TW201412867A - Resin composition having light-guiding ability, and light guide plate and surface light source body comprising same - Google Patents

Abstract

The present invention provides a resin composition offering both a high level of light-guiding ability and high flowability, as well as a light guide plate and surface light source body comprising the same. The present invention is a resin composition having light-guiding ability, containing (A) a polycarbonate resin (A-component) and (B) a polycarbonate/polydiorganosiloxane copolymer resin (B-component), wherein the resin composition has a viscosity-average molecular weight in the range of 1.2104 to 1.3104, and the B-component is a polycarbonate/polydiorganosiloxane copolymer resin where a polydiorganosiloxane domain having a mean size of 0.5 to 40 nm is present in a matrix of polycarbonate polymer.

Description

Resin composition having light guiding property and light guide plate and surface light source body composed thereof

The present invention relates to a resin composition having light guiding properties, and a light guiding plate and a surface light source body comprising the same. More specifically, it relates to an optical element such as an optical lens or a light guide plate (light guide) which is excellent in transparency and light guiding property, and which is excellent in thermal stability and hue, or a display panel or a cover for illumination ( A resin composition having light guiding properties such as glass instead of use, and a light guide plate and a surface light source body comprising the same.

The light guide plate has a function of diffusing light entering from the side surface and exhibiting uniform light on the surface. When the light guide plate is used for a panel, the back surface does not require a light source to enter, and a thin and uniform panel can be produced. Therefore, it can be expected to be widely used for a liquid crystal display device such as a personal computer or a mobile phone, or a lighting fixture. Needless to say, the material for the light guide plate needs to have a property of less attenuation of light by the light source, that is, light guiding property. Among the transparent resins, the most suitable material is polymethyl methacrylate (hereinafter sometimes) Called "PMMA"). However, PMMA is not necessarily sufficient in terms of impact resistance, thermal stability, etc., and the use of the aforementioned uses is limited. point. Further, in order to develop a light-emitting diode (LED) of a light source from the viewpoint of long life and low power consumption, in addition to the above characteristics, the light guide plate is required to have heat resistance. Therefore, a technique for improving the light guiding property of a polycarbonate resin excellent in heat resistance and impact resistance has been attracting attention.

An example of improving the light guiding property of a polycarbonate, for example, an aromatic polycarbonate resin composition for a light guide plate in which a specific stabilizer and a releasing agent are blended in a polycarbonate resin having a viscosity average molecular weight of 13,000 to 15,000 (patent Document 1). However, although the light guiding property, that is, the brightness is improved, but for the hue improvement, only the improvement of the burnt yellowing is mentioned, and the in-plane color difference is not mentioned. Patent Documents 2 to 4 disclose a composition obtained by mixing an aromatic polycarbonate resin and an acrylic resin having higher transparency. However, this method cannot avoid white turbidity by adding an acrylic resin or a diffusing agent. Patent Document 5 discloses a composition of a mixed aromatic polycarbonate resin and a polyorganosiloxane having a branched siloxane structure. However, in this method, gas generation at the time of molding or agglomeration of a siloxane is considered, and a good light guide plate cannot be obtained.

Further, a resin composition containing a polycarbonate and a polycarbonate-polydiorganotoxime copolymerized resin, for example, a matrix having a mean area size of 20 to 45 nm or 20 to 40 nm is embedded in a matrix of a polycarbonate polymer. A thermoplastic resin composition in a siloxane region (Patent Document 6). However, Patent Document 6 does not describe light guiding properties at all.

In addition, in recent years, the display device including a television or a computer has a thinner and larger size, and the light guide plate and its peripheral components tend to be thinner and larger. For example, a liquid crystal display device used in a mobile phone, a smart phone, a tablet personal computer, or the like has a thickness of about 3 mm, and is assembled in The thickness of the light guide plate in these is also as small as 0.2 mm, and therefore a resin material having high fluidity and excellent light guiding performance is required.

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2007-204737

[Patent Document 2] Japanese Patent No. 3330498

[Patent Document 3] Japanese Patent No. 3516908

[Patent Document 4] Japanese Patent Laid-Open Publication No. 2006-201667

[Patent Document 5] Japanese Patent No. 4446668

[Patent Document 6] Japanese Patent Publication No. 2006-523243

[Disclosure of the Invention]

An object of the present invention is to provide a resin composition having both high light guiding performance and high fluidity, and a light guide plate and a surface light source body comprising the same.

As a result of intensive studies conducted by the inventors of the present invention to achieve the above object, it has been found that a specific viscosity average molecular weight of a polycarbonate-polydiorganosiloxane copolymerized resin having a specific polycarbonate resin and a specific polydiorganotoxioxane region is found. The resin composition is excellent in light guiding property, small in-plane chromatic aberration, excellent in hue, and excellent in high fluidity and formability, and the present invention has been completed.

In other words, according to the present invention, the following resin can be provided a composition, and a light guide plate and a surface light source body composed of the same.

A resin composition having light guiding properties, characterized by comprising (A) a polycarbonate resin (component A) and (b) a polycarbonate-polydiorganotoxioxane copolymer resin (component B) The composition wherein the resin composition has a viscosity average molecular weight of 1.2×10 ⁴ to 1.3×10 ⁴ , and the B component is a polydiorgano having an average size of 0.5 to 40 nm in a matrix of a polycarbonate polymer. Polycarbonate-polydiorganotoxime copolymerized resin in the oxane region.

2. The resin composition having light guiding properties according to the above item 1, wherein the component B is a polycarbonate block represented by the following formula [2] and a polydiorganotoxime represented by the following formula [4]. Polycarbonate-polydiorganotoxime copolymerized resin composed of segments

[In the above formula [2], R ¹ and R ² each independently represent an alkoxy group selected from a hydrogen atom, a halogen atom, an alkyl group having 1 to 18 carbon atoms, a carbon number of 1 to 18, and a carbon number of 6 a cycloalkyl group of ~20, a cycloalkoxy group having 6 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an aryl group having 3 to 14 carbon atoms, an aryloxy group having 3 to 14 carbon atoms, a group in which an aralkyl group having 7 to 20 carbon atoms, an aralkyloxy group having 7 to 20 carbon atoms, a nitro group, an aldehyde group, a cyano group, and a carboxyl group are each grouped, and each of them may be the same or Different from each other, e and f are each an integer of 1 to 4, and W is a single bond or at least one group selected from the group represented by the following formula [3].

(In the above formula [3], R ¹¹ , R ¹² , R ¹³ , R ¹⁴ , R ¹⁵ , R ¹⁶ , R ¹⁷ and R ¹⁸ each independently represent an alkyl group selected from a hydrogen atom and a carbon number of 1 to 18, a group in which an aryl group having 3 to 14 carbon atoms and an aralkyl group having 7 to 20 carbon atoms are grouped, and each of R ¹⁹ and R ²⁰ is independently selected from a hydrogen atom, a halogen atom, and a carbon number of 1 to 18. Alkyl group, alkoxy group having 1 to 10 carbon atoms, cycloalkyl group having 6 to 20 carbon atoms, cycloalkoxy group having 6 to 20 carbon atoms, alkenyl group having 2 to 10 carbon atoms, carbon atom An aryl group of 3 to 14, an aryloxy group having 6 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an aralkyloxy group having 7 to 20 carbon atoms, a nitro group, an aldehyde group, and a cyano group And the group in which the carboxyl group is grouped, when they have a complex number, they may be the same or different, and g is an integer of 1 to 10, and h is an integer of 4 to 7)]

(In the above formula [4], R ³ , R ⁴ , R ⁵ , R ⁶ , R ⁷ and R ⁸ each independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms or a substitution or absence of carbon number 6 to 12. The substituted aryl group, each of R ⁹ and R ¹⁰ is independently a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, p is a natural number, and q is 0 or For natural numbers, p+q is a natural number below 150. X is a divalent aliphatic group having a carbon number of 2-8.

3. The resin composition having light guiding properties according to the above item 1 or 2, which is contained in the above formula [4], which is represented by the following formula [5], based on the total weight of the resin composition. The content of the siloxane block is 0.001 to 1.0% by weight,

(In the above formula [5], R ²¹ , R ²² , R ²³ , R ²⁴ , R ²⁵ and R ²⁶ each independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms or a substitution or absence of carbon number 6 to 12. Substituted aryl, r is a natural number, s is 0 or a natural number, and r+s is a natural number below 150).

4. The resin composition having light guiding properties according to any one of the above items 1 to 3, which is represented by the above formula [5] based on the total weight of the resin composition, and is contained in the above formula [4]. The polydiorganotoxime block is contained in an amount of 0.01 to 0.5% by weight.

5. The resin composition having light guiding properties according to any one of items 1 to 4 above, wherein the component B is a polydiorganofluorene having an average size of 0.5 to 18 nm in a matrix of the polycarbonate polymer. Polycarbonate-polydiorganotoxime copolymerized resin in the oxane region.

6. The resin composition having light guiding properties according to any one of the above items 1 to 5, wherein (B) polycarbonate-poly is contained with respect to 100 parts by weight of the (A) polycarbonate resin (component A) The diorganotoxime copolymerized resin (component B) is 0.01 to 10 parts by weight.

7. The resin composition having light guiding properties according to any one of the above items 1 to 6, wherein (C) the following formula [1] is contained with respect to 100 parts by weight of the (A) polycarbonate resin (component A); ] The phosphorus-based stabilizer (component C) is 0.01 to 1.0 part by weight.

(In the formula [1], each of A ¹ and A ² is independently an aryl group or an alkyl group, and may be the same or different).

A light guide plate characterized in that the resin composition according to any one of items 1 to 7 above is molded.

9. The light guide plate of item 8, wherein the length of the light guide plate in the longitudinal direction is 50 to 130 mm.

10. The light guide plate of item 8 or 9, wherein the thickness of the area occupying at least 80% of the light guide plate is in the range of 0.2 to 0.4 mm.

The light guide plate according to any one of the items 8 to 10, wherein one of the light guide plates is provided with a meandering shape, and the opposite surface is given an arcuate convex or concave shape.

12. A surface light source body characterized by the aforementioned items 8 to 11 One of the light guide plates of any one of them is provided with a reflector.

The polycarbonate resin composition having a specific viscosity average molecular weight obtained in the present invention has a specific agglomerated structure in the polydiorganosiloxane region in the molded body, and is excellent in transparency, high fluidity, and formability. At the same time, it exhibits excellent light guiding properties, so it can be used for parts that have not been used in the past. Specific examples are widely used in the field of optical parts, electrical and electronic equipment, and automotive fields. More specifically, for example, various exterior molded articles and lens barrels, such as a lighting cover, a display diffuser or a light guide plate, a glass replacement use, various optical disks and related members such as a compact disk, and a battery exterior body. , memory card, speaker cone (cone), disk 匣, surface illuminator, micro-machine mechanism parts, molded products containing hinges or molded products for hinges, light-transmitting, light-guiding buttons, touch Panel parts, etc.

Fig. 1 is a schematic view showing a method of measuring light guiding properties (brightness and in-plane chromatic aberration) in the present invention.

[Best Mode for Carrying Out the Invention]

The invention is specifically described below.

(Component A: polycarbonate resin)

The polycarbonate resin used as the component A of the present invention is usually obtained by reacting a dihydroxy compound with a carbonate precursor by an interfacial polycondensation method or a melt transesterification method, for example, by using a carbonate prepolymer. The solid phase transesterification polymerizer or the cyclic carbonate compound is polymerized by a ring opening polymerization method. The dihydroxy component used herein is usually a user of a dihydroxy component as an aromatic polycarbonate, and may be a bisphenol or an aliphatic diol.

Bisphenols such as 4,4'-dihydroxybiphenyl, bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxyphenyl)ethane, 1,1-bis(4-hydroxybenzene) 1,-1-phenylethane, 2,2-bis(4-hydroxyphenyl)propane, 2,2-bis(4-hydroxy-3-methylphenyl)propane, 1,1-double (4 -hydroxyphenyl)-3,3,5-trimethylcyclohexane, 2,2-bis(4-hydroxy-3,3'-biphenyl)propane, 2,2-bis(4-hydroxy- 3-isopropylphenyl)propane, 2,2-bis(3-t-butyl-4-hydroxyphenyl)propane, 2,2-bis(4-hydroxyphenyl)butane, 2,2- Bis(4-hydroxyphenyl)octane, 2,2-bis(3-bromo-4-hydroxyphenyl)propane, 2,2-bis(3,5-dimethyl-4-hydroxyphenyl)propane , 2,2-bis(3-cyclohexyl-4-hydroxyphenyl)propane, 1,1-bis(3-cyclohexyl-4-hydroxyphenyl)cyclohexane, bis(4-hydroxyphenyl)di Phenylmethane, 9,9-bis(4-hydroxyphenyl)anthracene, 9,9-bis(4-hydroxy-3-methylphenyl)anthracene, 1,1-bis(4-hydroxyphenyl) ring Hexane, 1,1-bis(4-hydroxyphenyl)cyclopentane, 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxy-3,3'-dimethyldiphenyl Ether, 4,4'-sulfonyl diphenol, 4,4'-dihydroxydiphenyl sulfoxide, 4,4'-dihydroxydiphenyl sulfide, 2,2'-dimethyl -4,4'- Nonyldiphenol, 4,4'-dihydroxy-3,3'-dimethyldiphenylarylene, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfide (Sulfides , 2,2'-diphenyl-4,4'-sulfonyldiphenol, 4,4'-dihydroxy-3,3'-diphenyldiphenylarylene, 4,4'-di Hydroxy-3,3'-diphenyldiphenyl sulfide, 1,3-bis{2-(4-hydroxyphenyl)propyl}benzene, 1,4-bis{2-(4-hydroxyphenyl) Propyl}benzene, 1,4-bis(4-hydroxyphenyl)cyclohexane, 1,3-bis(4-hydroxyphenyl)cyclohexane, 4,8-bis(4-hydroxyphenyl) Tricyclo[5.2.1.0 ^2,6 ]decane, 4,4'-(1,3-adamantanyldiyl)diphenol, 1,3-bis(4-hydroxyphenyl)-5,7-dimethyl Fundaneane and so on.

Aliphatic diols such as 2,2-bis-(4-hydroxycyclohexyl)-propane, 1,14-tetradecanediol, Octaethylene glycol, 1,16-hexadecane Glycol, 4,4'-bis(2-hydroxyethoxy)biphenyl, bis{(2-hydroxyethoxy)phenyl}methane, 1,1-bis{(2-hydroxyethoxy)benzene Ethyl, 1,1-bis{(2-hydroxyethoxy)phenyl}-1-phenylethane, 2,2-bis{(2-hydroxyethoxy)phenyl}propane, 2 ,2-bis{(2-hydroxyethoxy)-3-methylphenyl}propane, 1,1-bis{(2-hydroxyethoxy)phenyl}-3,3,5-trimethyl Cyclohexane, 2,2-bis{4-(2-hydroxyethoxy)-3,3'-biphenyl}propane, 2,2-bis{(2-hydroxyethoxy)-3-iso Propylphenyl}propane, 2,2-bis{3-t-butyl-4-(2-hydroxyethoxy)phenyl}propane, 2,2-bis{(2-hydroxyethoxy)benzene Butane, 2,2-bis{(2-hydroxyethoxy)phenyl}-4-methylpentane, 2,2-bis{(2-hydroxyethoxy)phenyl}octane, 1,1-bis{(2-hydroxyethoxy)phenyl}decane, 2,2-bis{3-bromo-4-(2-hydroxyethoxy)phenyl}propane, 2,2-double {3,5-Dimethyl-4-(2-hydroxyethoxy)phenyl}propane, 2,2-bis{3-cyclohexyl-4-(2-hydroxyethoxy)phenyl}propane, 1,1-double {3- Hexyl-4-(2-hydroxyethoxy)phenyl}cyclohexane, bis{(2-hydroxyethoxy)phenyl}diphenylmethane, 9,9-bis{(2-hydroxyethoxy) Phenyl}fluorene, 9,9-bis{4-(2-hydroxyethoxy)-3-methylphenyl}indole, 1,1-bis{(2-hydroxyethoxy)phenyl} ring Hexane, 1,1-bis{(2-hydroxyethoxy)phenyl}cyclopentane, 4,4'-bis(2-hydroxyethoxy)diphenyl ether, 4,4'-bis ( 2-hydroxyethoxy)-3,3'-dimethyldiphenyl ether, 1,3-bis[2-{(2-hydroxyethoxy)phenyl}propyl]benzene, 1,4- Bis[2-{(2-hydroxyethoxy)phenyl}propyl]benzene, 1,4-bis{(2-hydroxyethoxy)phenyl}cyclohexane, 1,3-double {(2) -hydroxyethoxy)phenyl}cyclohexane, 4,8-bis{(2-hydroxyethoxy)phenyl}tricyclo[5.2.1.0 ^2,6 ]decane, 1,3-double {( 2-hydroxyethoxy)phenyl}-5,7-dimethyl adamantane, 3,9-bis(2-hydroxy-1,1-dimethylethyl)-2,4,8,10- Tetraoxaspiro (5,5) undecane, 1,4:3,6-dihydroanhydro-D-sorbitol (Isosorbide), 1,4:3 , 6-dihydro-D-mannitol (isomannitol ester), 1,4:3,6-dihydro-L-sorbitol (isosorbide), and the like.

Among these, aromatic bisphenols are preferred, of which 1,1-bis(4-hydroxyphenyl)-1-phenylethane and 2,2-bis(4-hydroxyphenyl)propane are preferred. , 2,2-bis(4-hydroxy-3-methylphenyl)propane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)-3 , 3,5-trimethylcyclohexane, 4,4'-sulfonyl diphenol, 2,2'-dimethyl-4,4'-sulfonyl diphenol, 9,9-bis (4 -hydroxy-3-methylphenyl)indole, 1,3-bis{2-(4-hydroxyphenyl)propyl}benzene, and 1,4-double {2-(4-hydroxyphenyl)propyl }Benzene, especially preferably 2,2-bis(4-hydroxyphenyl)propane, 1,1-bis(4-hydroxybenzene) Base) cyclohexane, 4,4'-sulfonyl diphenol, and 9,9-bis(4-hydroxy-3-methylphenyl)anthracene. Among them, 2,2-bis(4-hydroxyphenyl)propane having excellent strength and excellent durability is preferred. Further, these may be used alone or in combination of two or more.

The polycarbonate resin used as the component A of the present invention can be used as a branched polycarbonate resin by using a branching agent in combination with the above-mentioned dihydroxy compound. A trifunctional or higher polyfunctional aromatic compound used in the branched polycarbonate resin, for example, glycine, gluside, or 4,6-dimethyl-2,4,6 - tris(4-hydroxydiphenyl)heptene-2,2,4,6-trimethyl-2,4,6-tris(4-hydroxyphenyl)heptane, 1,3,5-tri ( 4-hydroxyphenyl)benzene, 1,1,1-tris(4-hydroxyphenyl)ethane, 1,1,1-tris(3,5-dimethyl-4-hydroxyphenyl)ethane, 2,6-bis(2-hydroxy-5-methylbenzyl)-4-methylphenol, 4-{4-[1,1-bis(4-hydroxyphenyl)ethyl]benzene}-α, Trisphenol such as α-dimethylbenzylphenol, tetrakis(4-hydroxyphenyl)methane, bis(2,4-dihydroxyphenyl)one, 1,4-bis(4,4-dihydroxytriphenyl) Methyl)benzene, or trimimellitic acid, pyromellitic acid, benzophenone tetracarboxylic acid, and the like, and preferably 1,1. 1-tris(4-hydroxyphenyl)ethane, 1,1,1-tris(3,5-dimethyl-4-hydroxyphenyl)ethane, particularly preferably 1,1,1-three (4 -Hydroxyphenyl)ethane.

These polycarbonate resins are produced by a reaction mechanism generally known in the art for producing an aromatic polycarbonate resin, for example, a method in which an aromatic dihydroxy component is reacted with a carbonate precursor such as phosgene or a carbonic acid diester. A brief description of the basic mechanism of the manufacturing method.

The reaction is carried out using a carbonate precursor, such as phosgene, usually in the presence of an acid binder and a solvent. As the acid binder, for example, an alkali metal hydroxide such as sodium hydroxide or potassium hydroxide or an amine compound such as pyridine can be used. As the solvent, a halogenated hydrocarbon such as dichloromethane or chlorobenzene can be used. Further, in order to promote the reaction, a catalyst such as a tertiary amine or a fourth-order ammonium salt can be used. At this time, the reaction temperature is usually from 0 to 40 ° C, and the reaction time is from several minutes to 5 hours.

The transesterification reaction system using a carbonic acid diester as a carbonate precursor is heated under an inert gas atmosphere at a predetermined ratio of an aromatic dihydroxy component and a carbonic acid diester, and then the resulting alcohol or phenol is distilled off. The way to proceed. The reaction temperature varies depending on the boiling point of the produced alcohol or phenol, and is usually in the range of 120 to 300 °C. The reaction system is depressurized at the initial stage to distill off the produced alcohol or phenol, and the reaction is terminated. Further, in order to promote the reaction, a catalyst used in a usual transesterification reaction can be used. The carbonic acid diester used in the above transesterification reaction, for example, diphenyl carbonate, dinaphthyl carbonate, bis(diphenyl) carbonate, dimethyl carbonate, diethyl carbonate, dibutyl carbonate Ester and the like. Among these, it is particularly preferred to be diphenyl carbonate.

In the present invention, a terminator is used in the polymerization reaction. The terminal terminator is used for molecular weight adjustment, and the resulting polycarbonate resin has its ends blocked, so that the thermal stability is superior to those in which the terminal is not blocked. The terminal terminator is, for example, a monofunctional phenol represented by the following formula [6].

Wherein A is a hydrogen atom, an alkyl group having 1 to 9 carbon atoms, an alkylphenyl group (having a carbon number of 1 to 9 in the alkyl moiety), a phenyl group, or a phenylalkyl group (carbon number of the alkyl moiety) 1~9), r is 1~5, preferably an integer of 1~3].

Specific examples of the monofunctional phenol represented by the above formula [6] include, for example, phenol, isopropylphenol, p-tert-butylphenol, p-cresol, p-cumylphenol, 2-phenyl group. Phenol, 4-phenylphenol and isooctylphenol. P-tert-butylphenol, p-cumylphenol or 2-phenylphenol is preferred. The terminal terminator of the monofunctional phenols is at least 5 mol%, preferably at least 10 mol%, introduced into the terminal end with respect to the entire terminal of the obtained polycarbonate resin, and the terminal terminator may be separately Use or mix two or more types.

The polycarbonate resin used as the component A of the present invention may be an aromatic dicarboxylic acid such as terephthalic acid, isophthalic acid or naphthalene dicarboxylic acid, within a range not impairing the technical features of the present invention. A polyester carbonate in which a derivative or a derivative thereof is copolymerized.

The viscosity average molecular weight of the polycarbonate resin used as the component A of the present invention is preferably in the range of 1.15 × 10 ⁴ to 1.35 × 10 ⁴ , more preferably in the range of 1.20 × 10 ⁴ to 1.30 × 10 ⁴ , and more preferably It is in the range of 1.22 × 10 ⁴ ~ 1.28 × 10 ⁴ . The resin composition may have a viscosity average molecular weight of 1.2 × 10 ⁴ to 1.3 × 10 ⁴ , and in this range, moldability (particularly, moldability at the time of molding a thin molded article) is excellent, and mechanical strength is also good. . Further, the viscosity average molecular weight of the present invention is first obtained by using a solution of 0.7 g of a polycarbonate resin dissolved in 100 ml of dichloromethane at 20 ° C, and using an Ostwald viscometer to obtain a specific viscosity calculated by the following formula. The specific viscosity is inserted into the following formula to obtain a viscosity average molecular weight M.

Specific viscosity (η _SP )=(tt ₀ )/t ₀

[t ₀ is the number of seconds of methylene chloride falling, t is the number of seconds of falling of the sample solution]

η _SP /c=[η]+0.45×[η] ² c (but [η] is the ultimate viscosity)

[η]=1.23×10 ^-4 M ^0.83

c=0.7

The polycarbonate resin used in the component A of the present invention has a total Cl (chlorine) content in the resin of preferably 0 to 200 ppm, more preferably 0 to 150 ppm. When the total amount of Cl in the polycarbonate resin is 200 ppm or less, the hue and heat stability are good, which is preferable.

(Component B: Polycarbonate-polydiorganotoxime copolymerized resin)

The polycarbonate-polydiorganotoxioxane copolymerized resin used as the component B of the present invention means that a polydiorganooxane region having an average size of 0.5 to 40 nm exists in a matrix of a polycarbonate polymer. Carbonate-polydiorganotoxime copolymerized resin. The average size of the polydiorganotoxime region is preferably from 0.5 to 30 nm, more preferably from 0.5 to 18 nm, still more preferably from 2.0 to 18 nm, most preferably from 5.0 to 18 nm. When the average size is less than 0.5 nm, there is no effect of improving the in-plane chromatic aberration and improving the light guiding property. When the thickness exceeds 40 nm, turbidity occurs, and the total light transmittance is lowered, and the light guiding property may not be obtained, which is not preferable. The average size of the polydiorganotoxime region is determined by the small angle X Light scattering method (Small Angel X-ray Scattering: SAXS) measurement.

Further, the small-angle X-ray scattering method is a method of measuring a diffuse scattering diffraction generated in a small-angle region in which the scattering angle (2θ) is less than 10°. This small-angle X-ray scattering method measures diffuse scattering of X-rays by a difference in electron density when a substance having a size different in electron density from 1 to 100 nm is used. Based on the scattering angle and the scattering intensity, the particle diameter of the object to be measured is obtained. When a polycarbonate-polydiorganosiloxane copolymerized resin having a polycondensation structure of a polydiorganotoxioxane region is dispersed in a matrix of a polycarbonate polymer, a polycarbonate matrix and a polydiorganophosphonium oxide are used. The electron density of the alkane region is poor, resulting in diffuse scattering of X-rays. The scattering intensity I in each scattering angle (2θ) in the range where the scattering angle (2θ) is less than 10° is measured, and the small-angle X-ray scattering profile is measured, and the polydiorganotoxime region is a spherical region, assuming existence When the particle size distribution is deviated, the average particle size of the polydiorganotoxioxane region is determined by simulating the particle size and the assumed particle size distribution model using a commercially available analytical software. According to the small angle X-ray scattering method, the average size of the polydiorganotoxioxane region dispersed in the matrix of the polycarbonate polymer which cannot be accurately determined by the transmission electron microscope can be measured with good precision, simplicity, and good reproducibility. .

The component B is preferably a polycarbonate-polydiorganotoxirane copolymer composed of a polycarbonate block represented by the following formula [2] and a polydiorganotoxioxane block represented by the following formula [4]. Resin.

[In the above formula [2], R ¹ and R ² each independently represent an alkoxy group selected from a hydrogen atom, a halogen atom, an alkyl group having 1 to 18 carbon atoms, a carbon number of 1 to 18, and a carbon number of 6 a cycloalkyl group of ~20, a cycloalkoxy group having 6 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an aryl group having 3 to 14 carbon atoms, an aryloxy group having 3 to 14 carbon atoms, a group in which an aralkyl group having 7 to 20 carbon atoms, an aralkyloxy group having 7 to 20 carbon atoms, a nitro group, an aldehyde group, a cyano group, and a carboxyl group are each grouped, and each of them may be the same or Different from each, e and f are each an integer of 1 to 4, and W is a single bond or at least one group selected from the group represented by the following formula [3].

(In the above formula [3], R ¹¹ , R ¹² , R ¹³ , R ¹⁴ , R ¹⁵ , R ¹⁶ , R ¹⁷ and R ¹⁸ each independently represent an alkyl group selected from a hydrogen atom and a carbon number of 1 to 18, a group in which an aryl group having 3 to 14 carbon atoms and an aralkyl group having 7 to 20 carbon atoms are grouped, and each of R ¹⁹ and R ²⁰ is independently selected from a hydrogen atom, a halogen atom, and a carbon number of 1 to 18. Alkyl group, alkoxy group having 1 to 10 carbon atoms, cycloalkyl group having 6 to 20 carbon atoms, cycloalkoxy group having 6 to 20 carbon atoms, alkenyl group having 2 to 10 carbon atoms, carbon atom An aryl group of 3 to 14, an aryloxy group having 6 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an aralkyloxy group having 7 to 20 carbon atoms, a nitro group, an aldehyde group, and a cyano group When a group in which a carboxyl group is a group has a complex number, they may be the same or different, and g is an integer of 1 to 10, and h is an integer of 4 to 7.)]

(In the above formula [4], R ³ , R ⁴ , R ⁵ , R ⁶ , R ⁷ and R ⁸ each independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms or a substitution or absence of carbon number 6 to 12. The substituted aryl group, each of R ⁹ and R ¹⁰ is independently a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, p is a natural number, and q is 0 or Natural number, p+q is a natural number below 150, and X is a divalent aliphatic group having a carbon number of 2-8.

The dihydric phenol (I) derived from the carbonate constituent unit represented by the above formula [2], for example, 4,4'-dihydroxybiphenyl, bis(4-hydroxyphenyl)methane, 1,1-bis(4- Hydroxyphenyl)ethane, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, 2,2-bis(4-hydroxyphenyl)propane, 2,2-bis(4-hydroxyl -3-methylphenyl)propane, 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane, 2,2-bis(4-hydroxy-3,3' -biphenyl)propane, 2,2-bis(4-hydroxy-3-isopropylphenyl)propane, 2,2-bis(3-t-butyl-4-hydroxyphenyl)propane, 2, 2-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)octane, 2,2-bis(3-bromo-4-hydroxyphenyl)propane, 2,2- Bis(3,5-dimethyl-4-hydroxyphenyl)propane, 2,2-bis(3-cyclohexyl-4-hydroxyphenyl)propane, 1,1-bis(3-cyclohexyl-4- Hydroxyphenyl)cyclohexane, bis(4-hydroxyphenyl)diphenylmethane, 9,9-bis(4-hydroxyphenyl)fluorene, 9,9-bis(4-hydroxy-3-methylbenzene茀, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)cyclopentane, 4,4'-dihydroxydiphenyl ether, 4, 4'-dihydroxy-3,3'-dimethyldiphenyl ether, 4,4'-sulfonyl diphenol, 4,4'-dihydroxydiphenylarylene (sulfoxide) ), 4,4'-dihydroxydiphenyl sulfide (Sulfides), 2,2'-dimethyl-4,4'-sulfonyl diphenol, 4,4'-dihydroxy-3,3' - dimethyldiphenylarylene, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfide, 2,2'-diphenyl-4,4'-sulfonyl Phenol, 4,4'-dihydroxy-3,3'-diphenyldiphenylarylene, 4,4'-dihydroxy-3,3'-diphenyldiphenyl sulfide, 1,3- Double {2-(4-hydroxyphenyl)propyl}benzene, 1,4-bis{2-(4-hydroxyphenyl)propyl}benzene, 1,4-bis(4-hydroxyphenyl)cyclohexane Alkane, 1,3-bis(4-hydroxyphenyl)cyclohexane, 4,8-bis(4-hydroxyphenyl)tricyclo[5.2.1.0 ^2,6 ]decane, 4,4'-(1 , 3-adamantandiyl)diphenol, 1,3-bis(4-hydroxyphenyl)-5,7-dimethyladamantane, and the like.

Among these, 1,1-bis(4-hydroxyphenyl)-1-phenylethane, 2,2-bis(4-hydroxyphenyl)propane, 2,2-bis(4-hydroxyl) are preferred. 3-methylphenyl)propane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)-3,3,5-trimethylcyclohexane Alkane, 4,4'-sulfonyl diphenol, 2,2'-dimethyl-4,4'-sulfonyl diphenol, 9,9-bis(4-hydroxy-3-methylphenyl) Bismuth, 1,3-bis{2-(4-hydroxyphenyl)propyl}benzene, and 1,4-bis{2-(4-hydroxyphenyl)propyl}benzene, particularly preferably 2,2- Bis(4-hydroxyphenyl)propane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 4,4'-sulfonyl diphenol, and 9,9-bis(4-hydroxy-3-methylphenyl)indole. Among them, 2,2-bis(4-hydroxyphenyl)propane having excellent strength and excellent durability is preferred. Further, these may be used alone or in combination of two or more.

In the carbonate structural unit represented by the above formula [4], R ³ , R ⁴ , R ⁵ , R ⁶ , R ⁷ and R ⁸ each independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms or a carbon number of 6~. The substituted or unsubstituted aryl group of 12 is preferably a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, or a substituted or unsubstituted aryl group having 6 to 12 carbon atoms, particularly preferably a hydrogen atom and a carbon number of 1~ 6 alkyl, or phenyl. R ⁹ and R ¹⁰ each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, preferably a hydrogen atom or an alkyl group having 1 to 10 carbon atoms. The base is particularly preferably a hydrogen atom or an alkyl group having 1 to 4 carbon atoms. The dihydroxyaryl terminal polydiorganooxane (II) derived from the carbonate constituent unit represented by the above formula [4] is preferably a compound represented by the following formula (I).

Indicates that the degree of polymerization of the diorganooxane is p, q is natural The number, p+q is a natural number below 150, preferably 4 to 120, more preferably 30 to 120, and most preferably 30 to 100.

The content of the polydiorganosiloxane component in the total weight of the polycarbonate-polydiorganotoxime copolymer resin used as the component B of the present invention is preferably 0.01 to 20.0% by weight, more preferably 0.01%. 10.0% by weight, more preferably 2.0 to 10.0% by weight, most preferably 2.0 to 8.0% by weight. When the content of the polydiorganotoxime component is less than 0.01% by weight, the effect of improving the in-plane color difference is insufficient. When the content is more than 20.0% by weight, the total light transmittance is lowered, and the light guiding performance may not be obtained. Further, the degree of polymerization of the diorganotoxioxane and the content of the polydiorganotoxime component can be calculated by ¹ H-NMR measurement.

Next, a method for producing the above preferred polycarbonate-polydiorganotoxioxane copolymer resin will be described below.

First, in the mixture of a water-insoluble organic solvent and an aqueous alkali solution, chloroformate formation by a dihydric phenol (I) and a phosgene of a phosgene or a dihydric phenol (I) The reaction of the compound prepares a mixed solution of a chloroformate compound containing a bisphenol (I) chloroformate and/or a terminal chloroformate-based dihydric phenol (I) carbonate oligomer. The chloroformate forming compound is preferably phosgene.

When the chloroformate compound is produced from the dihydric phenol (I), the total amount of the dihydric phenol (I) derived from the carbonate constituent unit represented by the above formula [1] may be once in the form of a chloroformate compound or one part thereof. As a post-addition monomer, it can be added as a reaction raw material in the post-stage polycondensation reaction. The post-addition single system is added to accelerate the polycondensation reaction in the latter stage, and it is not necessary to add it when it is not necessary.

The method for forming the chloroformate compound is not particularly limited, and it is usually carried out in a solvent in the presence of an acid binder. Further, if necessary, an antioxidant such as sodium sulfite or hydrosulfite may be added in a small amount, preferably added.

The ratio of use of the chloroformate-forming compound may be appropriately adjusted in consideration of the stoichiometric ratio (equivalent) of the reaction. Further, when a preferred chloroformate-forming compound, that is, phosgene, is used, a method of blowing a gasified phosgene into the reaction system is preferably employed.

As the acid binder, for example, an alkali metal hydroxide such as sodium hydroxide or potassium hydroxide, an alkali metal carbonate such as sodium carbonate or potassium carbonate, an organic base such as pyridine or the like, or a mixture thereof may be used.

The ratio of use of the acid binder is also the same as described above, and the chemical dose ratio (equivalent) of the reaction can be appropriately determined. Specifically, the dihydric phenol (I) 1 mol (usually 1 mol is equivalent to 2 equivalents) used for the formation of the bisphenol (I) chloroformate compound is preferably 2 equivalents or slightly. More than 2 equivalents of acid binder.

The solvent may be a solvent which is inert to various reactions such as a user of a known polycarbonate, and may be used alone or in combination. Representative examples include, for example, a hydrocarbon solvent such as xylene, and a halogenated hydrocarbon solvent such as dichloromethane and chlorobenzene. It is particularly preferred to use a halogenated hydrocarbon solvent such as dichloromethane.

The pressure in the formation reaction of the chloroformate compound is not particularly limited, and may be any of normal pressure, pressurization, or reduced pressure, and it is usually preferred to carry out the reaction under normal pressure. The reaction temperature can be selected from the range of -20 to 50 ° C, usually accompanied There are many cases of heat generation with the reaction, and it is preferred to perform water cooling or ice cooling. The reaction time is affected by other conditions and cannot be specified. It is usually carried out within 0.2 to 10 hours. The pH range in the formation reaction of the chloroformate compound can be determined by a known interface reaction condition, and the pH is usually adjusted to 10 or more.

In the production of a polycarbonate-polydiorganotoxioxane copolymer resin used as the component B of the present invention, as described above, a chloroformate containing a dihydric phenol (I) and a terminal chloroformate group are prepared. After the mixed solution of the chloroformate compound of the carbonate oligo of the dihydric phenol (I), the mixed solution is stirred while the dihydroxy aryl terminal polydimerization derived from the carbonate constituent unit represented by the formula [3] The organooxane (II), the amount of the dihydric phenol (I) to be charged when the mixed solution is prepared is added per 1 mol, at a rate of 0.01 mol/min or less, so that the dihydroxyaryl terminal is polymerized. The organic siloxane (II) is interfacially condensed with the chloroformate compound to obtain a polycarbonate-polydiorganotoxime copolymerized resin.

The polycarbonate-polydiorganotoxioxane copolymerized resin used as the component B of the present invention is a combination of a branching agent and a dihydric phenol compound to form a branched polycarbonate-polydiorganotoxime copolymerization. Resin. A trifunctional or higher polyfunctional aromatic compound used in the branched polycarbonate resin, for example, glycine, gluside or 4,6-dimethyl-2,4,6- Tris(4-hydroxydiphenyl)heptene-2,2,4,6-trimethyl-2,4,6-tris(4-hydroxyphenyl)heptane, 1,3,5-tri(4 -hydroxyphenyl)benzene, 1,1,1-tris(4-hydroxyphenyl)ethane, 1,1,1-tris(3,5-dimethyl-4-hydroxyphenyl)ethane, 2 ,6-bis(2-hydroxy-5-methylbenzyl)-4-methylphenol, 4-{4-[1,1-bis(4-hydroxyphenyl)ethyl] Triphenylphenol such as benzene}-α,α-dimethylbenzylphenol, tetrakis(4-hydroxyphenyl)methane, bis(2,4-dihydroxyphenyl)one, 1,4-bis(4,4) -dihydroxytriphenylmethyl)benzene, or trimellitic acid, pyromellitic acid, benzophenone tetracarboxylic acid, and the like, and the like, Preferred is 1,1,1-tris(4-hydroxyphenyl)ethane, 1,1,1-tris(3,5-dimethyl-4-hydroxyphenyl)ethane, particularly preferably 1,1 , 1-tris(4-hydroxyphenyl)ethane.

The method for producing the branched polycarbonate-polydiorganotoxioxane copolymer resin may be a method in which a branching agent is contained in a mixed solution in the formation reaction of a chloroformate compound, or a reaction may be carried out in the formation reaction. A method of adding a branching agent when the interface is subjected to a polycondensation reaction. The ratio of the branching agent-derived carbonate constituent unit is constituting the total amount of the copolymerized resin branched carbonate constituent unit, preferably 0.005 to 1.5 mol%, more preferably 0.01 to 1.2 mol%, and particularly preferably 0.05. 1.0 mole %. The amount of this branch structure can be calculated by ¹ H-NMR measurement.

The pressure in the system in the polycondensation reaction may be any of reduced pressure, normal pressure, or pressurization, and it is usually carried out smoothly under normal pressure or the degree of self-pressure of the reaction system. The reaction temperature is selected from the range of -20 to 50 ° C, and heat is often generated by polymerization, so that it is preferably water-cooled or ice-cooled. The reaction time varies depending on other conditions such as the reaction temperature, and cannot be specified, and is usually carried out in 0.5 to 10 hours.

The obtained polycarbonate-polydiorganotoxime copolymerized resin may be subjected to appropriate physical treatment (mixing, separation, etc.) and/or chemical treatment (polymer reaction, crosslinking treatment, partial decomposition treatment, etc.), A polycarbonate-polydiorganotoxime copolymerized resin having a desired reduction viscosity [η _SP /c] can be obtained.

The obtained reaction product (crude product) can be subjected to various post-treatments such as a known separation and purification method, and a polycarbonate-polydiorganotoxime copolymerized resin having a desired purity (purification degree) can be recovered.

The viscosity average molecular weight of the polycarbonate-polydiorganotoxioxane copolymer resin used as the component B of the present invention is preferably in the range of 1.2 × 10 ⁴ to 3.0 × 10 ⁴ , more preferably 1.3 × 10 ⁴ to 2.5. The range of ×10 ⁴ is more preferably in the range of 1.5 × 10 ⁴ to 2.5 × 10 ⁴ . The viscosity average molecular weight used as the resin composition is in the range of 1.2 × 10 ⁴ to 1.3 × 10 ⁴ , and in this range, moldability (particularly, moldability in forming a thin molded article) is excellent, and mechanical strength is also good. .

The viscosity average molecular weight of the polycarbonate-polydiorganotoxioxane copolymer resin used as the component B of the present invention is calculated in the following manner. First, 0.7 g of a polycarbonate-polydiorganotoxioxane copolymer resin was dissolved in 100 ml of dichloromethane at 20 ° C, and an specific viscosity (η _SP ) calculated by the following formula was obtained using an Ostwald viscometer. .

Specific viscosity (η _SP )=(tt ₀ )/t ₀

[t ₀ is the number of seconds of dropping of methylene chloride, and t is the number of seconds of falling of the sample solution] From the obtained specific viscosity (η _SP ), the viscosity average molecular weight Mv is obtained by the following formula.

η _SP /c=[η]+0.45×[η] ² c (but [η] is the ultimate viscosity)

[η]=1.23×10 ^-4 M ^0.83

c=0.7

The content of the polydiorganotoxioxane block represented by the following formula [5] contained in the following formula [4] contained in the component B is based on the total weight of the polycarbonate resin composition, preferably 0.001. It is preferably 1.0 to 0.8% by weight, more preferably 0.01 to 0.8% by weight, still more preferably 0.01 to 0.5% by weight, particularly preferably 0.01 to 0.3% by weight, most preferably 0.01 to 0.2% by weight. When the ratio is less than 0.001% by weight, the in-plane chromatic aberration improving effect cannot be exhibited, and when it exceeds 1.0% by weight, the total light transmittance is lowered, and the light guiding performance may not be obtained, which is not preferable.

(In the above formula [4], R ³ , R ⁴ , R ⁵ , R ⁶ , R ⁷ and R ⁸ each independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms or a substitution or absence of carbon number 6 to 12. The substituted aryl group, each of R ⁹ and R ¹⁰ is independently a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, p is a natural number, and q is 0 or For natural numbers, p+q is a natural number below 150. X is a divalent aliphatic group having a carbon number of 2-8.

(In the above formula [5], R ²¹ , R ²² , R ²³ , R ²⁴ , R ²⁵ and R ²⁶ each independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms or a substitution or absence of carbon number 6 to 12. Substituted aryl, r is a natural number, s is 0 or a natural number, and r+s is a natural number below 150).

The content of the component B is preferably 0.01 to 10 parts by weight, more preferably 0.01 to 8 parts by weight, still more preferably 0.01 to 5 parts by weight, based on 100 parts by weight of the polycarbonate resin (component A), particularly preferably 0.1 to 3 parts by weight, preferably 0.1 to 2 parts by weight. When the amount of the component B is less than 0.01 part by weight, there is no effect in improving the in-plane chromatic aberration and improving the light guiding property. When the amount is more than 10 parts by weight, the total light transmittance is lowered, and the light guiding property may not be obtained.

(resin composition)

The resin composition of the present invention contains (A) a polycarbonate resin (component A) and (B) a polycarbonate-polydiorganotoxioxane copolymer resin (component B).

The viscosity average molecular weight of the resin composition of the present invention is in the range of 1.2 × 10 ⁴ to 1.3 × 10 ⁴ , preferably in the range of 1.22 × 10 ⁴ to 1.28 × 10 ⁴ . When the viscosity average molecular weight exceeds 1.3 × 10 ⁴ , the formability (particularly, the formability at the time of forming a thin molded article) is poor, and when the viscosity average molecular weight is less than 1.2 × 10 ⁴ , the mechanical strength is poor. Further, in the viscosity average molecular weight of the present invention, a solution obtained by dissolving 0.7 g of a resin composition in 100 ml of dichloromethane at 20 ° C is used, and the specific viscosity calculated by the following formula is obtained by using an Ostwald viscometer, and the obtained viscosity is obtained. The specific viscosity M is determined by inserting the specific viscosity into the following formula.

Specific viscosity (η _SP )=(tt ₀ )/t ₀

[t ₀ is the number of seconds of methylene chloride falling, t is the number of seconds of falling of the sample solution]

η _SP /c=[η]+0.45×[η] ² c (but [η] is the ultimate viscosity)

[η]=1.23×10 ^-4 M ^0.83

c=0.7

(phosphorus stabilizer)

It is preferred that the resin composition of the present invention is formulated with a phosphorus-based stabilizer at such a degree that hydrolysis resistance is not promoted. The phosphorus-based stabilizer improves the thermal stability during production or molding, and improves mechanical properties, hue, and molding stability. Phosphorus stabilizers include, for example, phosphorous acid, phosphoric acid, phosphinic acid, phosphonic acid, and esters thereof, and tertiary phosphines.

In the present invention, a phosphorus-based stabilizer which is represented by the following formula [1] is preferably used in the phosphorus-based stabilizer.

(In the formula [1], A ¹ and A ² are each independently an aryl group or an alkyl group, and may be the same or different.)

In the formula [1], when A ¹ and A ² are an aryl group, an aryl group having 6 to 30 carbon atoms is preferred, an aryl group having 6 to 20 carbon atoms is more preferred, and a carbon number of 6 to 10 is more preferred. Aryl. Specifically, for example, there are dimercaptophenyl pentaerythritol diphosphite, bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, bis(2,4-di-tert-butyl) -6-methylphenyl)pentaerythritol diphosphite, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite, bis(2,6-di-tert- Butyl-4-ethylphenyl)pentaerythritol diphosphite, bis(2,4-dicumylphenyl)pentaerythritol diphosphite, etc., of which bis(2,4-di-tert-butyl is preferred Phenyl phenyl) pentaerythritol diphosphite, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite.

In the formula [1], when A ¹ and A ² are an alkyl group, it is preferably an alkyl group having 1 to 30 carbon atoms, more preferably an alkyl group having 6 to 30 carbon atoms, and still more preferably a carbon number of 6 to 20 carbon atoms. alkyl. Specific examples include dioctyl pentaerythritol diphosphite, dicyclohexyl pentaerythritol diphosphite, distearyl pentaerythritol diphosphite, and behenyl pentaerythritol diphosphite. Among these, distearate pentaerythritol diphosphite is preferably used. The stabilizer to be used as the component C of the present invention may be used singly or in combination of two or more.

The content of the phosphorus-based stabilizer (component C) is preferably 0.01 to 1.0 part by weight, more preferably 0.01 to 0.5 part by weight, still more preferably 0.01 to 0.3 by weight based on 100 parts by weight of the polycarbonate resin (component A). The parts by weight are particularly preferably 0.01 to 0.1 parts by weight, most preferably 0.01 to 0.05. When the content of the component C exceeds 1.0 part by weight, the coating material may be generated, which tends to be disadvantageous to the cost, and when it is less than 0.01 part by weight, the hue improving effect may be small.

(other additives)

In order to improve the flame retardancy, light diffusibility, oxidation resistance, light stability (ultraviolet stability), fluorescent whitening property, mold release property, and mold corrosion of the resin composition of the present invention, it is possible to use the improved one. Additives. These additives are specifically described below.

(I) flame retardant

The resin composition of the present invention can be formulated with various compounds known as flame retardants of polycarbonate resins. The compounding of this compound can improve flame retardancy, and, based on the properties of each compound, for example, antistatic property, fluidity, rigidity, thermal stability, and the like can be improved. Examples of the flame retardant include (i) an organic metal salt-based flame retardant (for example, an organic sulfonic acid alkali (earth) metal salt, an organic boric acid metal salt-based flame retardant, and an organic stannate metal-based flame retardant, etc.), (ii) an organophosphorus-based flame retardant (for example, a catalyst-containing compound, a phosphate oligomer compound, a Phosphonate oligomer compound, a phosphazene oligomer compound) And a phosphonium amide compound, etc.), (iii) a polyoxygenated flame retardant composed of a polyoxygenated compound, (iv) fibrillation PTFE, preferably an organic metal salt-based flame retardant , organic phosphorus based flame retardant.

(i) organometallic salt-based flame retardant

The organometallic salt compound is an alkali (earth) metal salt of an organic acid having 1 to 50 carbon atoms, preferably 1 to 40, preferably an organic sulfonic acid alkali (earth) metal. salt. The alkali metal salt of the organic sulfonic acid comprises a metal of a fluorine-substituted alkylsulfonic acid having a carbon atom number of 1 to 10, preferably 2 to 8, and a metal salt of an alkali metal or an alkaline earth metal. a salt, and a metal salt of an aromatic sulfonic acid having an alkyl group number of 7 to 50, preferably 7 to 40, and an alkali metal or an alkaline earth metal. The alkali metal constituting the metal salt may, for example, be lithium, sodium, potassium, rubidium or cesium, and the alkaline earth metals such as barium, magnesium, calcium, strontium and barium. More preferably, it is an alkali metal. Among the alkali metals, when higher transparency is required, ruthenium and osmium having a larger ionic radius are preferable, and such non-universal use is difficult to purify, and as a result, it may be disadvantageous in terms of cost. Further, a metal having a smaller ionic radius such as lithium or sodium may, in contrast, be inferior in flame retardancy. In consideration of this, the alkali metal in the alkali metal sulfonate may be used separately, but in any of the above, the potassium sulfonate having excellent balance of properties is preferable. An alkali metal sulfonate composed of the potassium salt and other alkali metals may be used in combination.

Specific examples of the alkali metal salt of perfluoroalkylsulfonic acid are potassium trifluoromethanesulfonate, potassium perfluorobutanesulfonate, potassium perfluorohexanesulfonate, potassium perfluorooctanesulfonate, and sodium pentafluoroethanesulfonate. , sodium perfluorobutane sulfonate, sodium perfluorooctane sulfonate, lithium trifluoromethane sulfonate, lithium perfluorobutane sulfonate, lithium perfluoroheptane sulfonate, cesium trifluoromethanesulfonate, perfluorobutane Barium alkanesulfonate, barium perfluorooctanesulfonate, barium perfluorohexanesulfonate, barium perfluorobutanesulfonate, barium perfluorohexanesulfonate, etc., these may be used alone or in combination the above.

The carbon number of the perfluoroalkyl group is preferably in the range of from 1 to 18, more preferably in the range of from 1 to 10, still more preferably in the range of from 1 to 8. Among these, potassium perfluorobutanesulfonate is particularly preferred. In the perfluoroalkylsulfonic acid alkali (earth) metal salt composed of an alkali metal, a large amount of fluoride ion (F-) is usually mixed. The presence of this fluoride ion may cause an important cause of a decrease in flame retardancy, and thus it is only possible to lower the preference. The ratio of this fluoride ion can be determined by ion chromatography. The content of the fluoride ion is preferably 100 ppm or less, more preferably 40 ppm or less, and particularly preferably 10 ppm or less. Further, the production efficiency is preferably 0.2 ppm or more. The perfluoroalkylsulfonic acid alkali (earth) metal salt having a reduced fluoride ion amount can be produced by the following production method, for example, by using a known production method, and reducing the content contained in the raw material for producing the fluorine-containing organometallic salt. a method of reducing the amount of fluoride ions, a method of removing hydrogen fluoride obtained by the reaction by heating a gas generated during the reaction, or a method of purifying the fluorine-containing organometallic salt by using recrystallization or reprecipitation at the time of production. Method of ion amount, etc. In particular, the organometallic salt-based flame retardant is relatively soluble in water, so ion-exchanged water is used, especially the resistance value is 18 MΩ. It is preferable to manufacture a water of cm or more, that is, a water having a conductivity of about 0.55 μS/cm or less, which is dissolved at a temperature higher than normal temperature, and then washed and then recrystallized.

Specific examples of the aromatic sulfonic acid alkali (earth) metal salt include, for example, diphenyl sulfide-4,4'-disulfonic acid disodium, diphenyl sulfide (sulfide)-4,4'-disulfonic acid. Dipotassium, potassium 5-sulfoisophthalate, sodium 5-sulfoisophthalate, polyethylene terephthalate polysulfonate polysodium, 1-methoxynaphthalene-4-sulfonate calcium, 4 - disodium lauryl phenyl ether disulfonate, poly(sodium poly( 2,6-dimethylphenyl oxide) polysulfonate, poly(1,3-phenylene ether) polysulfonate polysodium, Poly(1,4-phenylene ether) polysulfonic acid polysodium, poly(2,6-diphenylphenyl ether) polysulfonic acid potassium, poly(2-fluoro-6-butylphenyl ether) polysulfonate , sulfonate potassium sulfonate, sodium benzene sulfonate, bismuth benzene sulfonate, benzene Magnesium sulfonate, dipotassium p-benzenedisulfonate, dipotassium naphthalene-2,6-disulfonate, calcium biphenyl-3,3'-disulfonate, sodium diphenylsulfonium-3-sulfonate, Potassium diphenyl sulfonium-3-sulfonate, dipotassium diphenyl sulfonium-3,3'-disulfonate, dipotassium diphenyl sulfonium-3,4'-disulfonate, α,α,α-three Sodium fluoroacetophenone-4-sulfonate, dipotassium benzophenone-3,3'-disulfonate, disodium thiophene-2,5-disulfonate, dipotassium thiophene-2,5-disulfonate , thiophene-2,5-disulfonic acid calcium, sodium benzothiophene sulfonate, potassium sulfoxide-4-sulfonate, formalin condensate of sodium naphthalene sulfonate, and sulfonic acid Sodium formaldehyde condensate, etc. Among these aromatic sulfonic acid alkali (earth) metal salts, a potassium salt is particularly preferred. Among these aromatic sulfonic acid alkali (earth) metal salts, potassium diphenylsulfonium-3-sulfonate and dipotassium diphenylphosphonium-3,3'-disulfonate are preferred. The mixture (the former to the latter weight ratio is 15/85~30/70).

The organic metal salt other than the alkali metal salt of sulfonic acid is preferably an alkali (earth) metal salt of a sulfate and an alkali (earth) metal salt of an aromatic sulfonamide. a base metal salt of a sulfate, particularly a base (soil) metal salt of a sulfate of a monohydric and/or polyhydric alcohol, a sulfate of the monohydric and/or polyhydric alcohol, for example, methyl sulfate, B Sulfate, lauryl sulfate, cetyl sulfate, sulfate of polyoxyethylene alkyl phenyl ether, mono-, di-, tri-, tetra-sulphate of pentaerythritol, sulfate of glycerol monoglyceride (Glyceride) Sulfate of tetradecanoic acid monoglyceride, and sulfate of stearic acid monoglyceride. These sulfate base (earth) metal salts are preferably alkali metal (salt) salts of lauryl sulfate. Alkyl (earth) metal salts of aromatic sulfonamides, for example, saccharin, N-(p-methylsulfonyl)-p-toluenesulfonimide, N-(N'- A benzylaminocarbonylcarbonylsulfonylimine, and an alkali (earth) metal salt of N-(phenylcarboxy)sulfonylimine. The content of the organometallic salt-based flame retardant is preferably 0.001 to 1 part by weight, more preferably 0.005 to 0.5 part by weight, still more preferably 0.01 to 0.3 part by weight based on 100 parts by weight of the polycarbonate resin (component A). It is particularly preferably 0.03 to 0.15 parts by weight.

(ii) organophosphorus flame retardants

The organophosphorus-based flame retardant is preferably an aryl phosphate compound. Therefore, the phosphate compound is probably excellent in hue. Further, since the phosphate compound has a plasticizing effect, it is advantageous in improving the formability. As the phosphate compound, various known phosphate compounds can be used as a flame retardant. The compounding amount of the organophosphorus-based flame retardant is preferably 0.01 to 20 parts by weight, more preferably 2 to 10 parts by weight, still more preferably 2 to 7 parts by weight based on 100 parts by weight of the polycarbonate resin (component A). Share.

(iii) Polysilicone flame retardant

The polyasoxy compound used as the polyoxygen-based flame retardant is a person who improves the flame retardancy by a chemical reaction at the time of combustion. As the compound, various compounds which have been conventionally proposed as flame retardants for aromatic polycarbonate resins can be used. The polyoxymethylene compound imparts a flame retarding effect to the polycarbonate resin due to its own bonding or bonding to a structure derived from a resin, or a reduction reaction when the structure is formed. Therefore, it is preferred that the reaction contains a group having a high activity, and more specifically, a group containing at least one selected from the group consisting of an alkoxy group and a hydrogen group (i.e., a Si-H group) is preferable. The content ratio of the group (alkoxy group, Si-H group) is preferably in the range of 0.1 to 1.2 mol/100 g, more preferably in the range of 0.12 to 1 mol/100 g, still more preferably 0.15 to 0.6 mol/100 g. The scope. This ratio is obtained by measuring the amount of hydrogen or alcohol produced per unit weight of the polyfluorene oxide by an alkali decomposition method. Further, the alkoxy group is preferably an alkoxy group having 1 to 4 carbon atoms, particularly preferably a methoxy group. In general, the structure of the polyoxymethylene compound is constituted by arbitrarily combining four kinds of decaneoxy units shown below. In other words, M unit: (CH ₃ ) ₃ SiO _1/2 , H(CH ₃ ) ₂ SiO _1/2 , H ₂ (CH ₃ )SiO _1/2 , (CH ₃ ) ₂ (CH ₂ =CH) SiO _{1 1/2} , (CH ₃ ) ₂ (C ₆ H ₅ )SiO _1/2 , (CH ₃ )(C ₆ H ₅ )(CH ₂ =CH)SiO _1/2, etc. 1-functional decaneoxy unit, D unit :(CH ₃ ) ₂ SiO, H(CH ₃ )SiO, H ₂ SiO, H(C ₆ H ₅ )SiO, (CH ₃ )(CH ₂ =CH)SiO, (C ₆ H ₅ ) ₂ SiO, etc. Bifunctional decaneoxy unit, T unit: (CH ₃ )SiO _3/2 , (C ₃ H ₇ )SiO _3/2 , HSiO _3/2 , (CH ₂ =CH)SiO _3/2 , (C ₆ H ₅ ) a trifunctional decaneoxy unit such as SiO _3/2 or a Q unit: a tetrafunctional decaneoxy unit represented by SiO ₂ . Specific examples of the structure of the polyfluorene oxide compound used in the polyoxygenated flame retardant include Dn, Tp, MmDn, MmTp, MmQq, MmDnTp, MmDnQq, MmTpQq, MmDnTpQq, DnTp, and DnQq. , DnTpQq. The preferred structure of the polyoxymethylene compound is MmDn, MmTp, MmDnTp, MmDnQq, and a more preferable structure is MmDn or MmDnTp.

Here, the coefficients m, n, p, and q in the above formula represent an integer of 1 or more of the polymerization degree of each decaneoxy unit, and the total of the coefficients in the respective formulae is the average degree of polymerization of the polyoxonium compound. Average degree of polymerization Preferably, it is in the range of 3 to 150, more preferably in the range of 3 to 80, and more preferably in the range of 3 to 60, and particularly preferably in the range of 4 to 40. The more excellent it is, the more excellent the flame retardancy. As described later, the polyfluorene oxide compound containing a predetermined amount of the aromatic group is excellent in transparency or hue. As a result, good reflected light can be obtained. Further, when any of m, n, p, and q is a numerical value of 2 or more, the decaneoxy unit containing the coefficient may be a hydrogen atom or two or more kinds of decaneoxy units having different hydrogen atoms.

The polyoxyxene compound may be linear or have a branched structure. Further, the organic residue bonded to the ruthenium atom is preferably an organic residue having 1 to 30 carbon atoms, more preferably 1 to 20 carbon atoms. Specific examples of the organic residue include an alkyl group such as a methyl group, an ethyl group, a propyl group, a butyl group, a hexyl group and a decyl group, a cycloalkyl group of a cyclohexyl group, an aryl group of a phenyl group, and an aryl group of a tolyl group. base. More preferably, it is an alkyl group, an alkenyl group or an aryl group having 1 to 8 carbon atoms. The alkyl group is preferably an alkyl group having 1 to 4 carbon atoms such as a methyl group, an ethyl group, and a propyl group. Further, the polyfluorene oxide compound used as the polyoxygenated flame retardant preferably contains an aryl group. Further, the decane compound and the decane compound which are organic surface treatment agents for titanium dioxide pigments have a preferable effect from the fact that no aryl group is contained, and a preferred aspect thereof can be clearly distinguished from a polyfluorene-based flame retardant. The polyfluorene oxide compound used as the polyoxygenated flame retardant may contain a reactive group in addition to the Si—H group and the alkoxy group, and the reactive group may have, for example, an amine group, a carboxyl group, an epoxy group, a vinyl group, or a hydrogen group. Sulfur-based, methacryloxycarbonyl, and the like.

The blending amount of the polyoxygenated flame retardant is preferably 0.01 to 20 parts by weight, more preferably 0.5 to 10 parts by weight, still more preferably 1 to 5, based on 100 parts by weight of the polycarbonate resin (component A). Parts by weight.

(iv) Polytetrafluoroethylene (fibrous PTFE) with fiber forming ability

The fiberized PTFE may be a fiberized PTFE alone or a mixed form of fiberized PTFE, that is, a polytetrafluoroethylene mixture composed of a fiberized PTFE particle and an organic polymer. The fiberized PTFE has an extremely high molecular weight, and the PTFE is bonded to each other due to an external action such as shearing force, and tends to be fibrous. The number average molecular weight is in the range of 1.5 million to tens of millions. This lower limit is preferably 3 million. The number average molecular weight is calculated based on the melt viscosity of polytetrafluoroethylene at 380 ° C as disclosed in JP-A-6-145520. That is, the fiber-reinforced PTFE of the component B has a melt viscosity at 380 ° C measured in the manner described in the publication of the range of 107 to 1013 poise, preferably in the range of 108 to 1012 poise. In addition to the solid shape, the PTFE can also be used in the form of an aqueous dispersion. The fiberized PTFE provides dispersibility in the resin, and in order to obtain better flame retardancy and mechanical properties, a PTFE mixture in a mixed form with other resins may be used. Further, as disclosed in Japanese Laid-Open Patent Publication No. Hei 6-145520, it is preferable to use a structure having a fiber PTFE as a core and a low molecular weight polytetrafluoroethylene as a shell.

Commercial products of this fiberized PTFE, for example, Mitsui. Dupont Fluorochemicals (share) Teflon (registered trademark) 6J, Daikin Chemical Industry Co., Ltd. polyflon MPA FA500, F-201L and so on. The mixed form of the fiberized PTFE may be obtained by the following method, (1) mixing the aqueous dispersion of the PTFE PTFE with an aqueous dispersion or solution of the organic polymer, and coprecipitating to obtain a coaggregation mixture; (methods described in JP-A-60-258263, JP-A-63-154744, and the like), (2) a method of mixing an aqueous dispersion of a fiberized PTFE with an organic polymer particle after drying ( Japanese Laid-Open Patent Publication No. Hei-4-272957, (3) A method in which an aqueous dispersion of a fiberized PTFE is uniformly mixed with an organic polymer particle solution, thereby simultaneously removing the respective media in the mixture (Japanese Patent Application No. 06--) A method of polymerizing a monomer forming an organic polymer in an aqueous dispersion of a fiberized PTFE (4), and a method described in JP-A No. 9-95583 (Japanese Patent Application Laid-Open No. Hei 9-95583) The method described in the publication, and (5) a method in which a mixture of an aqueous dispersion of PTFE and an organic polymer dispersion is uniformly mixed, and then a vinyl monomer is polymerized in the mixed dispersion, and then a mixture is obtained (Japan) The method described in JP-A-11-29679 or the like). For the commercial products of the fiber-reinforced PTFE of such a mixed form, for example, "metablen A3000" (trade name) "metablen A3700" (trade name) of Mitsubishi Rayon Co., Ltd., and metatable A represented by "metablen A3800" (trade name) Series, SN3300B7 (trade name) of Shine Polymer Co., Ltd., and "BLENDEX B449" (trade name) manufactured by GE Specialty Chemicals Co., Ltd., etc.

The proportion of the fiberized PTFE in the mixed form is 100% by weight of the mixture, and the fiberized PTFE is preferably from 1% by weight to 95% by weight, more preferably from 10% by weight to 90% by weight, most preferably 20% by weight. 80% by weight.

The proportion of fibrillated PTFE in the mixed form is in this range At the same time, good dispersibility of the fiberized PTFE can be achieved. The blending amount of the PTFE is preferably 0.001 to 0.2 parts by weight, more preferably 0.01 to 0.2 parts by weight, still more preferably 0.01 to 0.18 parts by weight, per 100 parts by weight of the polycarbonate resin (component A). The parts by weight shown here are the weights of the entire mixture when the polytetrafluoroethylene is in a mixed form (mixture).

(II) Light diffusing agent

The resin composition of the present invention may contain various compounds known as light diffusing agents for polycarbonate resins. Further, the light diffusing agent may be any of organic fine particles and inorganic fine particles represented by polymer fine particles. Representative examples of the polymer fine particles include crosslinked particles obtained by polymerizing a non-crosslinkable monomer and a crosslinkable monomer. Further, other copolymerizable monomers other than the monomer may be used.

Among them, polymer microparticles are preferred, and crosslinked particles are particularly preferred. In the crosslinked particles, examples of the monomer to be used as the non-crosslinkable monomer include a non-crosslinkable vinyl monomer such as an acrylic monomer, a styrene monomer, and an acrylonitrile monomer, and an olefin system. Monomers, etc.

The acrylic monomer may be used alone or in combination of methacrylate, ethacrylate, propyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, ethyl methacrylate, and A. Propyl acrylate, butyl methacrylate, 2-ethylhexyl methacrylate, and phenyl methacrylate. Among them, methyl methacrylate is particularly preferred.

Moreover, the styrene monomer can make styrene, α-methylphenyl Alkyl styrene such as olefin, methyl styrene (vinyl toluene), and ethyl styrene, and halogenated styrene such as brominated styrene, particularly preferably styrene.

As the acrylonitrile-based monomer, acrylonitrile and methacrylonitrile can be used. Further, as the olefin monomer, ethylene and various norbornene-type compounds can be used.

Further, other monomers which can be copolymerized include, for example, glycidyl methacrylate, N-methyl maleimide, maleic anhydride and the like. The organic crosslinked particles of the present invention may, for example, have units such as N-methylglutarimide.

The crosslinkable monomer of the non-crosslinkable vinyl monomer is, for example, divinylbenzene, allyl methacrylate, triallyl cyanurate, triallyl isocyanate, or B. Diol (meth) acrylate, diethylene glycol di (meth) acrylate, propylene glycol (meth) acrylate, 1,6-hexanediol di(meth) acrylate, trimethylolpropane (meth) acrylate, pentaerythritol tetra (meth) acrylate, bisphenol A di (meth) acrylate, dicyclopentyl di (meth) acrylate, dicyclopentenyl di (meth) acrylate Ester, and N-methylol (meth) acrylamide and the like.

The average particle diameter of the light diffusing agent used in the present invention is preferably from 0.01 to 50 μm, more preferably from 1 to 30 μm, still more preferably from 2 to 30 μm. When the average particle diameter is less than 0.01 μm or exceeds 50 μm, the light diffusibility may be insufficient. This average particle diameter is represented by a 50% value (D50) of a cumulative distribution of particle sizes obtained by laser diffraction or scattering. The particle size distribution can be single or plural. It is possible to combine two or more kinds of light diffusing agents having different average particle diameters. However, a better light diffusing agent is one in which the particle size distribution is narrow. More preferably, it has a distribution of 70% by weight or more of the particles in the range of 2 μm after the average particle diameter. The shape of the light diffusing agent is preferably from a viewpoint of light diffusibility, and is closer to a spherical shape, and the closer to a true spherical shape, the better. This spherical shape includes an elliptical ball.

The refractive index of the light diffusing agent used in the present invention is usually preferably in the range of 1.30 to 1.80, more preferably 1.33 to 1.70, still more preferably in the range of 1.35 to 1.65. When these are blended in a resin composition, a sufficient light diffusing function can be exhibited.

The content of the light diffusing agent used in the present invention is preferably 0.005 to 10.0 parts by weight, more preferably 0.1 to 10.0 parts by weight, still more preferably 0.1 to 5.0, based on 100 parts by weight of the polycarbonate resin (component A). It is particularly preferably 0.1 to 2.0 parts by weight.

(III) Phosphorus stabilizer other than component C

The resin composition of the present invention can be adjusted to a phosphorus-based stabilizer other than the C component to the extent that the hydrolysis property is not promoted. The phosphorus-based stabilizer improves the thermal stability during production or molding, and improves mechanical properties, hue, and molding stability. Phosphorus stabilizers include, for example, phosphorous acid, phosphoric acid, phosphinic acid, phosphonic acid, and esters thereof, and tertiary phosphines.

Specifically, the phosphite compound is, for example, triphenylphosphite, tris(nonylphenyl)phosphite, tridecylphosphite, trioctylphosphite, or tris(octadecyl) Phosphate ester, dinonyl monophenyl phosphite, dioctyl monophenyl phosphite, diisopropyl monophenyl phosphite, monobutyl diphenyl phosphite, monodecyl diphenyl phosphoric acid Ester, monooctyl diphenyl phosphite, 2,2-methylenebis(4,6-di-tert-butylphenyl)octyl phosphite, tris(diethylphenyl)phosphoric acid Ester, tris(di-iso-propylphenyl)phosphite, tris(di-n-butylphenyl)phosphite, tris(2,4-di-tert-butylphenyl)phosphite The tris(2,6-di-tert-butylphenyl)phosphite and other phosphite compounds may also be used in the reaction with a dihydric phenol and have a cyclic structure. For example, there are 2,2'-methylenebis(4,6-di-tert-butylphenyl)(2,4-di-tert-butylphenyl)phosphite, 2,2'-methylene Bis(4,6-di-tert-butylphenyl)(2-tert-butyl-4-methylphenyl)phosphite, 2,2'-methylenebis(4-methyl- 6-tert-butylphenyl)(2-tert-butyl-4-methylphenyl)phosphite, 2,2'-ethylidene bis(4-methyl-6-tert- Butylphenyl) (2-tert-butyl-4-methylphenyl) phosphite, and the like.

Phosphate compounds are, for example, tributyl phosphate, trimethyl phosphate, cresyl phosphate, triphenyl phosphate, trichlorophenyl phosphate, triethyl phosphate, diphenyl cresyl Phosphate ester, mono-ortho-xenyl phosphate, tributoxyethyl phosphate, dibutyl phosphate, dioctyl phosphate, diisopropyl phosphate, etc. Preferred is triphenyl phosphate or trimethyl phosphate.

Phosphonite compounds are, for example, tetrakis(2,4-di-tert-butylphenyl)-4,4'-biphenylene diphosphinate, tetrakis(2,4-di-tert) -butylphenyl)-4,3'-biphenylene diphosphinate, tetrakis(2,4-di-tert-butylphenyl)-3,3'-biphenylene diphosphine Acid ester, tetrakis(2,6-di-tert-butylphenyl)-4,4'-biphenylene diphosphinate, tetrakis(2,6-di-tert-butylphenyl)- 4,3'-biphenylene diphosphinate, four (2,6-di-tert-butylphenyl)-3,3'-biphenylene diphosphinate, bis(2,4-di-tert-butylphenyl)-4-phenyl -phenylphosphonite, bis(2,4-di-tert-butylphenyl)-3-phenyl-phenylphosphinate, bis(2,6-di-n-butylphenyl) -3-phenyl-phenylphosphinate, bis(2,6-di-tert-butylphenyl)-4-phenyl-phenylphosphinate, bis(2,6-di- Tert-butylphenyl)-3-phenyl-phenylphosphinate, etc., preferably tetrakis(di-tert-butylphenyl)-biphenylene diphosphinate, bis(di- Tert-butylphenyl)-phenyl-phenylphosphinate, more preferably tetrakis(2,4-di-tert-butylphenyl)-biphenyldiphosphinate, double (2) , 4-di-tert-butylphenyl)-phenyl-phenylphosphinate. This phosphonite compound is preferably used in combination with the above-mentioned alkyl group as a phosphite compound having two or more substituted aryl groups.

The phosphonite compound may, for example, be a phosphonic acid dimethyl ester, a diethyl phosphonate, or a dipropyl phosphonate. The third stage phosphonic acid (PHOSPHINE) is, for example, triethylphosphonic acid, tripropylphosphonic acid, tributylphosphonic acid, trioctylphosphonic acid, tripentylphosphonic acid, dimethylphenylphosphonic acid, dibutyl. Phenylphosphonic acid, diphenylmethylphosphonic acid, diphenyloctylphosphonic acid, triphenylphosphonic acid, tri-p-tolylphosphonic acid, trinaphthylphosphonic acid, and diphenylbenzylphosphonic acid Wait. A particularly preferred grade 3 phosphonic acid is triphenylphosphonic acid. The phosphorus-based stabilizer may be used alone or in combination of two or more. Among the above phosphorus stabilizers, it is preferred to formulate an alkyl phosphate compound represented by trimethyl phosphate. Further, a combination of the alkyl phosphate compound and the phosphite compound and/or the phosphonite compound is also preferred.

(IV) hindered phenol stabilizer

A hindered phenol-based stabilizer can be further formulated in the resin composition of the present invention. This preparation can exert effects such as suppressing deterioration of hue during molding processing or deterioration of hue during use in a long period of time. Hindered phenolic stabilizers are, for example, vitamin E, butylhydroxytoluene, sinapyl alcohol, vitamin E, n-octadecyl-β-(4'-hydroxy-3', 5'-di-tert- Butyl phenyl) propionate, 2-tert-butyl-6-(3'-tert-butyl-5'-methyl-2'-hydroxybenzyl)-4-methylphenyl acrylate, 2,6-di-tert-butyl-4-(N,N-dimethylaminomethyl)phenol, 3,5-di-tert-butyl-4-hydroxybenzylphosphonate diethyl Ester, 2,2'-methylenebis(4-methyl-6-tert-butylphenol), 2,2'-methylenebis(4-ethyl-6-tert-butylphenol), 4,4'-methylenebis(2,6-di-tert-butylphenol), 2,2'-methylenebis(4-methyl-6-cyclohexylphenol), 2,2'- Dimethylene-bis(6-α-methyl-benzyl-p-cresol) 2,2'-butylene-bis(4,6-di-tert-butylphenol), 2,2'- Butylene-bis(4-methyl-6-tert-butylphenol), 4,4'-butylene bis(3-methyl-6-tert-butylphenol), triethylene glycol-N-double -3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate, 1,6-hexanediol bis[3-(3,5-di-tert-butyl-4 -hydroxyphenyl)propionate], bis[2-tert-butyl-4-methyl 6-(3-tert-butyl-5-methyl-2-hydroxybenzyl)phenyl]p-phenylene Formate, 3,9-bis{2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoxy]-1,1,-dimethylethyl }-2,4,8,10-tetraoxaspiro[5,5]undecane, 4,4'-thiobis(6-tert-butyl-m-cresol), 4,4'- Thiobis(3-methyl-6-tert-butylphenol), 2,2'-thiobis(4-methyl-6-tert-butylphenol), bis(3,5-di-tert -butyl-4-hydroxybenzyl) sulfide, 4,4'-di-thiobis(2,6-di-tert-butylphenol), 4,4'-tri-thiobis (2, 6-di-tert-butylphenol), 2,2-thiodiethylene Bis-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], 2,4-bis(n-octylthio)-6-(4-hydroxy-3 ',5'-di-tert-butylanilino)-1,3,5-triazine, N,N'-hexamethylenebis-(3,5-di-tert-butyl-4-hydroxyl Hydrogenated cinnamide, N,N'-bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanyl]hydrazine, 1,1, 3-tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane, 1,3,5-trimethyl-2,4,6-tris(3,5-di-tert -butyl-4-hydroxybenzyl)benzene, tris(3,5-di-tert-butyl-4-hydroxyphenyl)cyanate, tris(3,5-di-tert-butyl- 4-hydroxybenzyl) cyanurate, 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6-dimethylbenzyl) cyanurate, 1,3 , 5-tri-2[3(3,5-di-tert-butyl-4-hydroxyphenyl)propanoxy]ethylcyanurate, and tetrakis[methylene-3-(3) ',5'-di-tert-butyl-4-hydroxyphenyl)propionate]methane, and the like. These can be easily obtained. These hindered phenol-based stabilizers may be used singly or in combination of two or more.

The amount of the phosphorus-based stabilizer and the hindered phenol-based stabilizer is preferably 0.0001 to 1 part by weight, more preferably 0.001 to 0.5 part by weight, even more preferably 100 parts by weight based on the polycarbonate resin (component A). 0.005 to 0.3 parts by weight.

(V) Thermal stabilizer other than the aforementioned

In the resin composition of the present invention, a thermal stabilizer other than the phosphorus-based stabilizer and the hindered phenol-based stabilizer may be blended. The other heat stabilizer is preferably a lactone stabilizer represented by a reaction product of 3-hydroxy-5,7-di-tert-butyl-furan-2-one and o-xylene. Details of this stabilizer It is described in detail in Japanese Laid-Open Patent Publication No. Hei 7-233160. This compound is commercially available as Irganox HP-136 (trademark, manufactured by CIBA SPECIALTY CHEMICALS), and this compound can be used. A stabilizer which mixes the compound with various phosphite compounds and hindered phenol compounds is commercially available. Preferably, for example, Irganox HP-2921 manufactured by the aforementioned company is used. The amount of the lactone-based stabilizer is preferably 0.0005 to 0.05 parts by weight, more preferably 0.001 to 0.03 parts by weight, per 100 parts by weight of the polycarbonate resin (component A).

Further, other stabilizers include pentaerythritol tetrakis(3-hydrothiopropionate), pentaerythritol tetrakis(3-laurylthiopropionate), and glycerol-3-stearylthiopropionate. Sulfur-containing stabilizer. The amount of the sulfur-containing stabilizer is preferably 0.001 to 0.1 part by weight, more preferably 0.01 to 0.08 part by weight, per 100 parts by weight of the polycarbonate resin (component A).

In the resin composition of the present invention, an epoxy compound may be blended as necessary. This epoxy compound is formulated to suppress mold corrosion, and basically, those having an epoxy functional group can be applied. Specific examples of preferred epoxy compounds are 3,4-epoxycyclohexylmethyl-3',4'-epoxycyclohexylcarboxylate, 2,2-bis(hydroxymethyl)-1-butane. 1,2-Epoxy-4-(2-epoxyethyl)cyclooxane adduct of alcohol, copolymer of methyl methacrylate and glycidyl methacrylate, styrene and shrinkage a copolymer of glyceryl methacrylate or the like. The amount of the epoxy compound added is preferably 0.003 to 0.2 parts by weight, more preferably 0.004 to 0.15 parts by weight, still more preferably 0.005 to 0.1 part by weight, per 100 parts by weight of the polycarbonate resin (component A).

(VI) UV absorber

The resin composition of the present invention may contain an ultraviolet absorber in order to impart light resistance. Ultraviolet absorbers Specifically, benzophenones are, for example, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octyloxybiphenyl Methyl ketone, 2-hydroxy-4-benzyloxybenzophenone, 2-hydroxy-4-methoxy-5-sulfoxybenzophenone, 2,2'-dihydroxy-4-methoxy Benzophenone, 2,2',4,4'-tetrahydroxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2'-di Sodium hydroxy-4,4'-dimethoxy-5-sulfonate benzophenone, bis(5-benzylidene-4-hydroxy-2-methoxyphenyl)methane, 2-hydroxy-4 -n-dodecyloxybenzophenone and 2-hydroxy-4-methoxy-2'-carboxybenzophenone.

In particular, the benzotriazole is, for example, 2-(2-hydroxy-5-methylphenyl)benzotriazole, 2-(2-hydroxy-5-tert-octylphenyl)benzene. And triazole, 2-(2-hydroxy-3,5-dicumylphenyl)phenylbenzotriazole, 2-(2-hydroxy-3-tert-butyl-5-methylphenyl)- 5-Chlorobenzotriazole, 2,2'-methylenebis[4-(1,1,3,3-tetramethylbutyl)-6-(2H-benzotriazol-2-yl) Phenol], 2-(2-hydroxy-3,5-di-tert-butylphenyl)benzotriazole, 2-(2-hydroxy-3,5-di-tert-butylphenyl)-5 -Chlorobenzotriazole, 2-(2-hydroxy-3,5-di-tert-pentylphenyl)benzotriazole, 2-(2-hydroxy-5-tert-octylphenyl)benzo Triazole, 2-(2-hydroxy-5-tert-butylphenyl)benzotriazole, 2-(2-hydroxy-4-octyloxyphenyl)benzotriazole, 2,2'-Asia Methyl bis(4-pentyl-6-benzotriazolylphenyl), 2,2'-p-phenylphenylbis(1,3-oxazin-4-one), and 2-[2-hydroxyl -3-(3,4,5,6-tetrahydrogen Phthalimide methyl)-5-methylphenyl]benzotriazole, and 2-(2'-hydroxy-5-methylpropenyloxyethylphenyl)-2H - a copolymer of benzotriazole with a vinyl monomer copolymerizable with the monomer or 2-(2'-hydroxy-5-propenyloxyethylphenyl)-2H-benzotriazole A polymer having a 2-hydroxyphenyl-2H-benzotriazole skeleton, or the like, which is a copolymer of a vinyl monomer copolymerizable with the monomer.

The ultraviolet absorber specifically, a hydroxyphenyltriazine system, for example, 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-hexyloxyphenol, 2- (4,6-diphenyl-1,3,5-triazin-2-yl)-5-methoxyphenol, 2-(4,6-diphenyl-1,3,5-triazine- 2-yl)-5-ethoxyphenol, 2-(4,6-diphenyl-1,3,5-triazin-2-yl)-5-propoxyphenol, and 2-(4, 6-Diphenyl-1,3,5-triazin-2-yl)-5-butoxyphenol and the like. Further, for example, 2-(4,6-bis(2,4-dimethylphenyl)-1,3,5-triazin-2-yl)-5-hexoxyphenol or the like, the above-exemplified compound A compound in which a phenyl group is a 2,4-dimethylphenyl group.

Ultraviolet absorber Specifically, the cyclic imido ester is, for example, 2,2'-p-phenylphenylbis(3,1-oxazin-4-one), 2,2'-m-phenylene Bis(3,1-oxazin-4-one), and 2,2'-p,p'-diphenylene bis(3,1-oxazin-4-one) and the like.

Ultraviolet Absorber Specifically, the cyanoacrylate is, for example, 1,3-bis-[(2'-cyano-3',3'-diphenylpropenyl)oxy]-2,2-double [(2-Cyano-3,3-diphenylpropenyl)oxy]methyl)propane, and 1,3-bis-[(2-cyano-3,3-diphenylpropenyl) )oxy]benzene and the like.

The above ultraviolet absorber is a structure of a radically polymerizable monomer compound, and thus can be used for this ultraviolet absorbing monomer and/or light stabilizer A polymer type ultraviolet absorber in which a monomer is copolymerized with a monomer such as an alkyl (meth) acrylate. The ultraviolet absorbing monomer preferably has, for example, a (meth) acrylate ester substituent containing a benzotriazole skeleton, a benzophenone skeleton, a triazine skeleton, a cyclic imido ester skeleton, and a cyano group. A compound of an acrylate skeleton. In the above, from the viewpoint of ultraviolet absorption energy, a benzotriazole-based or hydroxyphenyltriazine-based system is preferred, and from the viewpoint of heat resistance or hue, a cyclic imido ester-based or cyanoacrylate-based system is preferred. . Specifically, for example, chemipro is converted into "Chemizorb 79". The ultraviolet absorber may be used singly or in combination of two or more. The amount of the ultraviolet absorber is preferably 0.01 to 2 parts by weight, more preferably 0.02 to 2 parts by weight, still more preferably 0.03 to 1 part by weight, based on 100 parts by weight of the polycarbonate resin (component A). It is preferably 0.05 to 0.5 parts by weight.

(VII) Fluorescent brightener

In the resin composition of the present invention, the fluorescent whitening agent is not particularly limited as long as it can be used to improve the color tone of a resin or the like to white or blue-white, and examples thereof include a stilbene-based or benzimidazole-based compound. A benzoxazole system, a naphthalimide system, a Rhodamine system, a coumarin system, an oxazine compound, and the like. Specifically, for example, CI Fluorescent Brightener 219:1 or EASTOBRITE OB-1 manufactured by Eastman Chemical Co., Ltd. or "HAKKOORU PSR" manufactured by HAKKOORU CHEMICAL Co., Ltd., or the like. Fluorescent whitening agents absorb the energy of the ultraviolet portion of the light and have the effect of radiating this energy to the visible portion. The amount of fluorescent whitening agent is relative to the polycarbonate tree The fat (component A) is 100 parts by weight, preferably 0.001 to 0.1 part by weight, more preferably 0.001 to 0.05 part by weight. Even if it exceeds 0.1 part by weight, the effect of improving the color tone of the composition is small.

(VIII) Other

In addition, in the resin composition of the present invention, in order to impart various functions or characteristics to the molded article, an additive known per se can be blended in a small proportion. These additives are generally formulated in amounts that do not detract from the object of the present invention. Examples of such additives include reinforcing fillers, slip agents (for example, PTFE particles), colorants, fluorescent dyes, inorganic phosphors (for example, phosphors using aluminate (Aluminate) as a mother crystal), antistatic agents, Crystal nucleating agent, inorganic and organic antibacterial agent, photocatalyst antifouling agent (for example, fine particle titanium oxide, fine particle zinc oxide), mold release agent, flow modifier, radical generator, infrared absorber (hot wire absorber), And photochromics (photochromics) and the like.

The resin composition of the present invention is formed into a pellet by a melt-kneading using a uniaxial extruder or a two-axis extruder. When the granule is produced, various flame retardants, reinforcing fillers, and additives described above can be blended. The resin composition of the present invention is usually injection-molded from the pellets produced as described above, and various articles can be produced. Further, the resin can be directly formed into a sheet, a film, a profiled extrusion molded article, a direct blow molded article, and an injection molded article without using a resin melted and kneaded by an extruder. This injection molding is not the only usual molding method, and injection molding, injection molding, and gas-assisted injection can be used for the purpose. Shape, foam forming (including supercritical fluid injector), insert molding, In-Mold Coating, thermal mold forming, rapid heating and cooling mold forming, two-color forming, sandwich forming A molded article is obtained by an injection molding method such as (sandwich molding) or ultra-high speed injection molding. The advantages of these various forming methods are well known. Further, any one of a cold runner method and a hot runner method can be selected for forming. The resin composition of the present invention can be used in the form of various shaped extruded articles, sheets, films, and the like by extrusion molding. Further, in the formation of a sheet or a film, an inflation method, a rolling method, a Casting method, or the like may be used. In addition, a heat shrinkable hollow tube (TUBE) can also be formed by applying a specific extension operation. The resin composition of the present invention can also be formed into a molded article by spin molding or blow molding.

(Manufacture of resin composition)

When the resin composition of the present invention is produced, any method can be employed. For example, the component A, the component B, and any other components are sufficiently mixed by using a mixing means such as a V-type mixer, a high-speed mixer (Henschel mixer), a mechanochemical apparatus, or an extrusion mixer, and if necessary, by extruding After granulation by a granulator or a briquetting machine (BRIQUETTING MACHINE), the melt kneader represented by a suction-type two-axis rudder (Ruder) is granulated by a machine such as melt-kneading and a pelletizer. Method.

(Manufacture of light guide plate)

When a light guide plate composed of the resin composition of the present invention is produced, any method can be employed. For example, the resin composition is kneaded by an extruder, a Banbury mixer, a roll, or the like, and then molded by a conventionally known method such as injection molding, extrusion molding, or compression molding to obtain a light guide plate. Moreover, a light source is disposed on at least one side surface of the light guide plate, and a reflector is disposed on one surface of the light guide plate to form a surface light source body. In addition to the fluorescent lamp, the light source of the light guide plate and the surface light source body can use a self-luminous body such as a cold cathode tube, an LED, a laser diode, or an organic EL. The light guide plate and the surface light source body of the present invention can be used for display parts of mobile phones, cameras, watches, personal computers, displays, illuminations, signals, automobile lamps, home appliances, optical machines, and the like. In particular, when the LED of the motor product is used as the light source, when the peripheral device requires flame retardancy or the like, the light guide plate and the surface light source body of the present invention are suitably used.

In the present invention, an aromatic polycarbonate resin composition having the above-described high light guiding performance and high fluidity is used, and a thin light guide plate, in particular, a light guide plate such as a mobile phone or a mobile terminal can be formed by an injection molding method. Specifically, a light guide plate having a length of 50 to 130 mm in the longitudinal direction of the light guide plate and a thickness of 0.2 to 0.4 mm in at least 80% of the light guide plate can be formed. Further, the single surface of the light guide plate may be provided with a meandering shape, and the opposite surface may be provided with an arcuate convex or concave shape. The light guide plate of the present invention is excellent in formability, product appearance, strength, brightness, and the like.

[Examples]

The embodiments are described below, but the invention is not limited to the embodiments. Evaluation is performed for the following items.

1. Evaluation of polycarbonate-polydiorganotoxime copolymerized resin (component B) (1) Viscosity average molecular weight (Mv)

A solution obtained by dissolving a polycarbonate-polydiorganotoxime copolymerized resin in 100 ml of dichloromethane at 20 ° C, and using an Ostwald viscometer, the specific viscosity (η _SP ) calculated by the following formula was obtained, and the specific viscosity ( η _SP )=(tt ₀ )/t ₀

[t ₀ is the number of seconds of methylene chloride falling, t is the number of seconds of falling of the sample solution]

From the obtained specific viscosity (? _SP ), the viscosity average molecular weight Mv was obtained by the following formula.

η _SP /c=[η]+0.45×[η] ² c (but [η] is the ultimate viscosity)

[η]=1.23×10 ^-4 M ^0.83

c=0.7

The viscosity average molecular weight (Mv) of the polycarbonate resin (component A) and the resin composition was also determined in the same manner.

(2) Polydiorganotoxime content

The ¹ H-NMR spectrum of the polycarbonate-polydiorganotoxioxane copolymerized resin was measured using JNM-AL400 manufactured by JEOL Ltd., by comparing the integral ratio of the peak derived from the dihydric phenol (I) with The integral ratio of the peaks of the hydroxyaryl-terminated polydiorganooxane (II) is calculated.

Content of polydiorganotoxime component (wt%) = [A / (A + B)] × 100

A: [integral ratio of the peak of ¹ H of one part of the dihydroxyaryl terminal polydiorganooxane (II)] × [molecular weight of the polydiorganotoxime moiety]

B: [integral ratio of the peak of one part of 1H of the dihydric phenol (I)] × [molecular weight of the dihydric phenol]

(3) Average size of polydiorganotoxime region

The polycarbonate-polydiorganotoxime copolymerized resin powder was granulated by kneading at a temperature of 260 ° C by a vent-type two-axis extruder (manufactured by Technoff Co., Ltd., KZW15-25MG). The obtained pellets were dried at 120 ° C for 5 hours with hot air, and then used an injection molding machine [Sumitomo Heavy Industries Co., Ltd. SG150U. SM IV], formed at a molding temperature of 280 ° C and a mold temperature of 80 ° C to form a width of 50 mm, a length of 90 mm, a thickness of the gate side of 3.0 mm (length 20 mm), 2.0 mm (length of 45 mm), and 1.0 mm (length of 25 mm). 3-stage metal plate (Plate). Using this three-stage metal plate, an X-ray diffraction device (RINT-TTRII, manufactured by Rigaku Co., Ltd.) was used to measure polydiorganoindene in an intersection of 5 mm from the end portion of the thickness of 1.0 mm and 5 mm from the side portion. The average size of the oxyalkylene region. The X-ray source used CuKα characteristic X-ray (wavelength 0.1541841 nm), tube voltage 50 kV, and tube current 300 mA. The small-angle scattering optical system is Slit: 1st 0.03 mm, HS 10 mm, SS 0.2 mm, and RS 0.1 mm. The measurement was carried out by asymmetric scanning (2θ scanning) with FT 0.01° STEP, 4 sec/step, and scanning range 0.06-3°. For the analysis of curve fitting, a small angle scattering analysis software NANO-Solver (Ver. 3.3) manufactured by Rigaku Co., Ltd. was used. The analytical system assumes that the polycarbonate polymer has agglomerated structure in which a spherical region of polydiorganotoxime is dispersed, and has a particle size distribution deviation, and the density of the polycarbonate matrix is 1.2 g/cm ³ . The density of the oxane region was 1.1 g/cm ³ , and the isolated particle model without interparticle interaction (interparticle interference) was analyzed.

2. Evaluation of resin composition (1) Hue

The pellets obtained from the respective compositions of the examples were dried at 120 ° C in a hot air circulating dryer for 5 hours, using an injection molding machine [Sumitomo Heavy Machinery Industry Co., Ltd. SG150U. S-M IV], a smooth flat plate having a width of 100 mm, a length of 100 mm, and a thickness of 5.0 mm was formed at a molding temperature of 320 ° C and a mold temperature of 80 ° C. The hue (YI value) of this smooth flat plate was measured using a Color-Eye 7000A manufactured by Gretag Macbeth.

(2) Average brightness

The pellets obtained from the respective compositions of the examples were dried at 120 ° C in a hot air circulating dryer for 5 hours, using an injection molding machine [Toshiba Machine (IS) EN150EN-5Y], a cylinder temperature of 300 ° C, and a mold temperature of 80 ° C. A light guide plate (100 mm × 70 mm × 4 mm) for evaluating the brightness was formed (the back surface was textured at intervals of 0.1 mm). The light guide plate was placed such that the back surface was on the lower side, and it was measured by BM-7 manufactured by Topcon Corporation. The edge of 70 mm × 4 mm causes light to enter, and the brightness of the illuminating light is generated by the surface of 100 mm × 70 mm. The average value was obtained by averaging the measured values of 9 in a total of 3 levels of the width 3 and the length of 3 levels. The incident light was used as a light source (consumption power of about 30 W) using NS2W150 (manufactured by Nichia Chemical Industry Co., Ltd.) as an LED at a pitch of 18 mm.

(3) In-plane color difference

The light guide plate was placed such that the back surface was on the lower side, and the chromaticity (x, y) of light emitted by the edge of 70 mm × 4 mm was measured by using the BM-7 of Topcon to measure the light incident from the edge of 70 mm × 4 mm. The in-plane color difference (Δ(x, y)) is evaluated by the value calculated by the following formula (1). The smaller the value, the smaller the in-plane color difference. The incident light was used as a light source (consumption power of about 30 W) using NS2W150 (manufactured by Nichia Chemical Industry Co., Ltd.) as an LED at a pitch of 18 mm.

△(x,y)=[(x ₂ -x ₁ )2+(y ₂ -y ₁ ) ² ] ^1/2 (1)

(x ₁ , y ₁ ) chromaticity at a distance of 80 mm from the light source

(x ₂ , y ₂ ) chromaticity at 20 mm from the light source

(4) Formability

The movable side of the mold is made of a nest made of steel with a short side of 65 mm/long side of 115 mm, and an arc-shaped concave type is provided on the fixed side of the mold opposite the nest to form a flat-shaped light guide plate having a thickness of 0.25 mm. .

The shape of the crucible is imparted by a mold having a width (or pitch) of 70 μm and a height (or depth) of 10 μm. The circular arc shape is a radius of 25 μm and a depth of 10 μm, and the dot interval from the light source side end surface of the short side of the light guide plate molded article to the (long side direction) 3/8 is 180 μm, and the same 3/8. The dot spacing up to ~5/8 is 120 μm, and the dot spacing from 5/8 to 7/8 is 80 μm, and the dot spacing from 7/8 to 8/8 is 60 μm.

The injection molding was formed by an injection molding machine [Toshiba Machine (IS) EN150EN-5Y] under the conditions of a cylinder temperature of 360 ° C and a mold temperature of 115 ° C.

The mold deposit, the formability, and the product strength at the time of molding the above-described molding conditions were evaluated in accordance with the following Table 1.

[Examples 1 to 17 and Comparative Examples 1 to 8]

The components A to C and various additives were mixed in a blender using the blending amounts shown in Tables 1 and 2, and then melted and kneaded using a suction type two-axis extruder to obtain pellets. The various additives used are pre-made with polycarbonate based on the concentration of 10 to 100 times of each compounding amount. After the mixture of the resin is prepared, the mixture is integrally mixed by a mixer. The suction type two-axis extruder is made of Nippon Steel Co., Ltd.: TEX30α (completely engaged, rotated in the same direction, and two screw screws). The ejecting conditions are a discharge amount of 25 kg/h, a screw rotation number of 200 rpm, a vacuum of suction of 4 kPa, and an extrusion temperature of 265 ° C from the first supply port to the second supply port, and a 285 ° C from the second supply port to the mold portion. . The evaluation results are shown in Table 2 and Table 3.

The ingredients used are as detailed below.

(component A) A-1: polycarbonate resin powder having a molecular weight of 12,500 obtained by the following method

In a reactor equipped with a thermometer, a stirrer, and a reflux condenser, 2340 parts of ion-exchanged water, 947 parts of a 25% sodium hydroxide solution, and 0.7 parts of sulfurous acid were added, and 2,2-bis(4-hydroxyphenyl) was dissolved under stirring. After propane (hereinafter sometimes referred to as "bisphenol A") 710 parts (bisphenol A solution), add 2299 parts of dichloromethane and 112 parts of 48.5% sodium hydroxide aqueous solution, and it will be 15 to 25 ° C for about 90 minutes. 354 parts of phosgene are blown in, and phosgenation is reversed. should. After the completion of phosgenation, 270 parts of a p-tert-butylphenol solution of 11% concentration in dichloromethane and 88 parts of a 48.5% sodium hydroxide aqueous solution were added, the stirring was stopped, and the mixture was allowed to stand for 10 minutes, and then emulsified for 5 minutes. Thereafter, a high emulsified dope was obtained by using a homogenizer (Special Machine Industry Co., Ltd.) at a number of revolutions of 1200 rpm and 35 passes. The high-emulsified dope was reacted in a polymerization tank (with a stirrer) at a temperature of 35 ° C for 3 hours without stirring to complete the polymerization. After the completion of the reaction, the organic phase is separated, diluted with dichloromethane, washed with water to form hydrochloric acid, washed with water until the conductivity of the aqueous phase is almost the same as that of the ion-exchanged water, and is put into a kneading machine filled with warm water, and stirred. The dichloromethane was evaporated to give a polycarbonate powder. After dehydration, it was dried at 120 ° C for 12 hours by a hot air circulation dryer to obtain a polycarbonate resin powder.

A-2: polycarbonate resin powder having a viscosity average molecular weight of 12,200 obtained by the following method

A polycarbonate resin powder was obtained in the same manner as in the production method of A-1 except that 275 parts of a p-tert-butylphenol methylene dichloride solution of 11% was changed.

A-3: polycarbonate resin powder having a viscosity average molecular weight of 12,800 obtained by the following method

A polycarbonate resin powder was obtained in the same manner as in the production method of A-1 except that it was changed to 264 parts of a p-tert-butylphenol solution of 11% strength.

A-4: polycarbonate resin powder having a viscosity average molecular weight of 13,200 obtained by the following method

A polycarbonate resin powder was obtained in the same manner as in the production method of A-1 except that 257 parts of a p-tert-butylphenol solution of p-tert-butylphenol was changed to 11%.

A-5: polycarbonate resin powder having a viscosity average molecular weight of 15,200 obtained by the following method

A polycarbonate resin powder was obtained in the same manner as in the production method of A-1 except that 225 parts of a p-tert-butylphenol solution of 11% strength was changed.

A-6: polycarbonate resin powder having a viscosity average molecular weight of 11,700 obtained by the following method

A polycarbonate resin powder was obtained in the same manner as in the production method of A-1 except that 285 parts of a p-tert-butylphenol solution of p-tert-butylphenol was changed to 11%.

(B component) B-1: Polycarbonate-polydiorganotoxime copolymerized resin powder having a viscosity average molecular weight of 19,100 obtained by the following method

In a reactor equipped with a thermometer, a stirrer, and a reflux condenser, 21591 parts of ion-exchanged water and 3674 parts of a 48.5% sodium hydroxide aqueous solution were added. The dihydroxy compound (I) constituting the carbonate structural unit represented by the above formula [2]: 3880 parts of 2,2-bis(4-hydroxyphenyl)propane (bisphenol A) and 7.6 parts of sulfurous acid are dissolved, 14565 parts of dichloromethane (14 mols with respect to the dihydroxy compound (I) 1 mol) was added, and 1900 parts of phosgene was blown in at 60 to 30 ° C for 60 minutes. Next, 1131 parts of 48.5% sodium hydroxide aqueous solution was added, and 108 parts of p-tert-butylphenol was dissolved in a solution of 800 parts of dichloromethane, and the dihydroxy aryl terminal polydiorganooxane (II) was stirred under stirring. The average number of repetitions of the dimethyl decane oxygen unit constituting the carbonate constituent unit represented by the above formula [4] is about 0.0008 mol/min in the amount of the dihydric phenol (I). a dihydroxyaryl terminal polydiorganooxane (II) of 37: a solution of 204 parts of a polydiorganotoxioxane compound represented by the following formula [10] dissolved in 1600 parts of methylene chloride, which is emulsified, and then re-formed Stir vigorously. Under the stirring, 4.3 parts of triethylamine was added to the reaction liquid at 26 ° C, and stirring was continued at a temperature of 26 to 31 ° C for 1 hour, and then the reaction was terminated. After the completion of the reaction, the organic phase is separated, diluted with dichloromethane, washed with water to form hydrochloric acid, washed with water until the conductivity of the aqueous phase is almost the same as that of the ion-exchanged water, and is put into a kneading machine filled with warm water, and stirred. The dichloromethane was evaporated to obtain a polycarbonate-polydiorganotoxime copolymerized resin powder. After dehydration, it was dried by a hot air circulating dryer at 120 ° C for 12 hours to obtain a polycarbonate-polydiorganotoxime copolymerized resin powder (polydiorganotoxime component content 4.1%, polydiorganotoxime) The average size of the region is 10 nm and the viscosity average molecular weight is 19,100)

B-2: Polycarbonate-polydiorganotoxime copolymerized resin powder having a viscosity average molecular weight of 19,400 obtained by the following method

A method for producing B-1, except that 430 parts of a dihydroxyaryl terminal polydiorganooxane having a repeating number of about 37 of a dimethyl decaneoxy unit constituting a polycarbonate constituent unit is used, and the stirring time is 45 minutes. In the same manner, a polycarbonate-polydiorganotoxime copolymerized resin powder (the polydiorganotoxime component content of 8.2%, the polydiorganotoxioxane region average size of 13 nm, and the viscosity average molecular weight of 19,400) was obtained.

B-3: Polycarbonate-polydiorganotoxirane copolymer resin powder having a viscosity average molecular weight of 19,200 obtained by the following method

A polycarbonate-polydiorganotoxioxane copolymer resin powder was obtained in the same manner as in the production method of B-1 except that the average number of repetitions of the dimethyl decaneoxy unit constituting the polycarbonate constituent unit was about 100. The polydiorganotoxime component content is 4.2%, the polydiorganotoxioxane region has an average size of 25 nm, and the viscosity average molecular weight is 19,200)

B-4: Polycarbonate-polydiorganotoxime copolymerized resin powder having a viscosity average molecular weight of 19,600 obtained by the following method

In addition to using a dimethyl decane oxygen unit constituting a polycarbonate constituent unit The average number of repetitions was about 150, and was carried out in the same manner as in the production method of B-1 to obtain a polycarbonate-polydiorganotoxime copolymerized resin powder (polydiorganotoxime component content 4.2%, polydiorganoindole) The average size of the oxane region is 38 nm and the viscosity average molecular weight is 19,600)

B-5: Polycarbonate-polydiorganotoxime copolymerized resin powder having a viscosity average molecular weight of 18,900 obtained by the following method

A polycarbonate-polydiorganotoxioxane copolymer resin powder was obtained in the same manner as in the production method of B-1 except that the average number of repetitions of the dimethyl decaneoxy unit constituting the polycarbonate constituent unit was about 13 ( The polydiorganotoxime component content is 4.2%, the polydiorganotoxioxane region has an average size of 1.0 nm, and the viscosity average molecular weight is 18,900.

B-6: Polycarbonate-polydiorganotoxime copolymerized resin powder having a viscosity average molecular weight of 19,200 obtained by the following method

A polycarbonate-poly is obtained in the same manner as in the production method of B-1 except that the average repeat number of the dimethyldecaneoxy unit constituting the polycarbonate constituent unit is 13 and the polydiorganosiloxane compound is 2 parts. Diorganotoxime copolymerized resin powder (polydiorganotoxime component content 0.04%, polydiorganotoxioxane region average size 0.3 nm, viscosity average molecular weight 19,200)

B-7: Polycarbonate-polydiorganotoxime copolymerized resin powder having a viscosity average molecular weight of 18,500 obtained by the following method

A polycarbonate-polydiorganotoxioxane copolymer resin powder was obtained in the same manner as in the production method of B-1 except that the average number of repetitions of the dimethyl decaneoxy unit constituting the polycarbonate constituent unit was about 200. The polydiorganotoxime component content is 4.2%, the polydiorganotoxioxane region has an average size of 48 nm, and the viscosity average molecular weight is 18,500)

(C component)

C-1: bis(2,6-di-t-butyl-4-methylphenyl)pentaerythritol diphosphite (manufactured by ADEKA: ADK STABPEP-36)

C-2: bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite (manufactured by ADEKA: ADK STAB PEP-24G)

(other ingredients)

D-1: Phosphate containing cresol bis[bis(2,6-dimethylphenyl)phosphate] as a main component (made by Daiba Chemical Industry Co., Ltd.: PX-200 (trade name))

D-2: Potassium perfluorobutane sulfonate (made by Dainippon Ink Chemicals Co., Ltd.: Megafac F-114P (trade name))

E-1: glyceryl monostearate (RicoMalS-100A (trade name): RikenMalS-100A (trade name))

F-1: hindered phenol-based antioxidant (manufactured by Ciba Specialty Chemical Co., Ltd.: Irganox 1076 (trade name))

G-1: UV absorber (chemipro chemical system: Chemizorb79 (trade name))

H-1: Fluorescent brightener (HAKKOORU CHEMICAL) System: HAKKOORU PSR (trade name))

[Industrial availability]

The resin composition of the present invention can be used as a light guide plate and a surface light source body.

Claims (12)

A resin composition having light guiding properties, characterized by comprising (A) a polycarbonate resin (component A) and (B) a polycarbonate-polydiorganotoxioxane copolymer resin (component B) resin composition Wherein the resin composition has a viscosity average molecular weight of 1.2×10 ⁴ to 1.3×10 ⁴ , and the B component is a polydiorganophosphonium having an average size of 0.5 to 40 nm in a matrix of the polycarbonate polymer. Polycarbonate-polydiorganotoxime copolymerized resin in the alkane region. A resin composition having light guiding properties according to the first aspect of the invention, wherein the component B is a polycarbonate block represented by the following formula [2] and a polydiorganotoxime represented by the following formula [4] Polycarbonate-polydiorganotoxime copolymerized resin composed of segments [In the above formula [2], R ¹ and R ² each independently represent an alkoxy group selected from a hydrogen atom, a halogen atom, an alkyl group having 1 to 18 carbon atoms, a carbon number of 1 to 18, and a carbon number of 6 a cycloalkyl group of ~20, a cycloalkoxy group having 6 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an aryl group having 3 to 14 carbon atoms, an aryloxy group having 3 to 14 carbon atoms, a group in which an aralkyl group having 7 to 20 carbon atoms, an aralkyloxy group having 7 to 20 carbon atoms, a nitro group, an aldehyde group, a cyano group, and a carboxyl group are each grouped, and each of them may be the same or Different from each other, e and f are each an integer of 1 to 4, and W is a single bond or at least one group selected from the group represented by the following formula [3]. (In the above formula [3], R ¹¹ , R ¹² , R ¹³ , R ¹⁴ , R ¹⁵ , R ¹⁶ , R ¹⁷ and R ¹⁸ each independently represent an alkyl group selected from a hydrogen atom and a carbon number of 1 to 18, a group in which an aryl group having 3 to 14 carbon atoms and an aralkyl group having 7 to 20 carbon atoms are grouped, and each of R ¹⁹ and R ²⁰ is independently selected from a hydrogen atom, a halogen atom, and a carbon number of 1 to 18. Alkyl group, alkoxy group having 1 to 10 carbon atoms, cycloalkyl group having 6 to 20 carbon atoms, cycloalkoxy group having 6 to 20 carbon atoms, alkenyl group having 2 to 10 carbon atoms, carbon atom An aryl group of 3 to 14, an aryloxy group having 6 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an aralkyloxy group having 7 to 20 carbon atoms, a nitro group, an aldehyde group, and a cyano group And the group in which the carboxyl group is grouped, when they have a complex number, they may be the same or different, and g is an integer of 1 to 10, and h is an integer of 4 to 7)] (In the above formula [4], R ³ , R ⁴ , R ⁵ , R ⁶ , R ⁷ and R ⁸ each independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms or a substitution or absence of carbon number 6 to 12. The substituted aryl group, each of R ⁹ and R ¹⁰ is independently a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, p is a natural number, and q is 0 or Natural number, p+q is a natural number below 150, and X is a divalent aliphatic group having a carbon number of 2-8. The resin composition having light guiding properties according to the first or second aspect of the patent application, which is based on the total weight of the resin composition, and is contained in the above formula [4] and is represented by the following formula [5]. The content of the siloxane block is 0.001 to 1.0% by weight, (In the above formula [5], R ²¹ , R ²² , R ²³ , R ²⁴ , R ²⁵ and R ²⁶ each independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms or a substitution or absence of carbon number 6 to 12. Substituted aryl, r is a natural number, s is 0 or a natural number, and r+s is a natural number below 150). The resin composition having light guiding properties according to any one of claims 1 to 3, which is represented by the above formula [5] based on the total weight of the resin composition, and is contained in the above formula [4]. The polydiorganotoxime block is contained in an amount of 0.01 to 0.5% by weight. The resin composition having light guiding properties according to any one of claims 1 to 4, wherein the component B is a polydiorganofluorene having an average size of 0.5 to 18 nm in a matrix of the polycarbonate polymer. Polycarbonate-polydiorganotoxime copolymerized resin in the oxane region. The resin composition having light guiding properties according to any one of claims 1 to 5, wherein (B) polycarbonate-poly is contained with respect to 100 parts by weight of (A) polycarbonate resin (component A) The diorganotoxime copolymerized resin (component B) is 0.01 to 10 parts by weight. The resin composition having light guiding properties according to any one of the items (1), wherein the (A) polycarbonate resin (component A) contains 100% by weight of (C) the following formula [1] ] The phosphorus-based stabilizer (component C) is 0.01 to 1.0 part by weight. (In the formula [1], each of A ¹ and A ² is independently an aryl group or an alkyl group, and may be the same or different). A light guide plate characterized by forming a resin composition according to any one of claims 1 to 7. For example, the light guide plate of the eighth application patent scope, wherein the length of the light guide plate in the longitudinal direction is 50 to 130 mm. The light guide plate of claim 8 or 9, wherein the thickness of the region occupying at least 80% of the light guide plate is in the range of 0.2 to 0.4 mm. The light guide plate according to any one of claims 8 to 10, wherein one of the light guide plates is provided with a serpentine shape, and the opposite surface is given an arcuate convex or concave shape. A surface light source body, which is characterized in that one of the light guide plates of any one of claims 8 to 11 is provided with a reflection plate.