JPH09227773A - Polycarbonate lubricant and polycarbonate composition containing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a lubricant for a polycarbonate, comprising specific purified stabilized rosin esters, excellent in color tone, malodor, thermal stability, etc., capable of maintaining mechanical properties and heat resistance of the polycarbonate and excellent in compatibility with the polycarbonate and properties of imparting the fluidity thereto. SOLUTION: This lubricant for a polycarbonate comprises purified and stabilized rosin esters (e.g. the one having <=2 Grardner color tone) prepared by reacting (A) purified and stabilized rosin esters (e.g. the ones prepared by distilling a disproportionated rosin, hydrogenated rosin or a dehydrogenated rosin and removing unsaponified materials or impurities), (B) an alcohol compound (e.g. the one having an aromatic ring, concretely a dihydric alcohol obtained by adding ethylene oxide or propylene oxide to bisphenol A) or an epoxy compound (e.g. the one having an aromatic ring, concretely resorcinol diglycidyl ether or phthalic anhydride diglycidyl ester).

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a lubricant for polycarbonate and a polycarbonate composition containing the same. More specifically, a lubricant capable of improving its fluidity and moldability while maintaining properties such as transparency, mechanical properties, heat resistance, and electrical properties of polycarbonate at a high level, and containing the lubricant. It relates to a polycarbonate composition.

[0002]

2. Description of the Related Art Polycarbonate has mechanical properties such as impact resistance, toughness and dimensional stability, transparency, heat resistance,
It is a molding material with excellent electrical properties. However, since polycarbonate generally has a high softening point and a high melt viscosity, it is necessary to raise the melting temperature at the time of injection molding and extrusion molding, and as a result, the obtained molded product is liable to be colored and the polymerization degree is lowered.

Therefore, various attempts have hitherto been made to add a plasticizer and a lubricant to polycarbonate to lower the softening point of the resin and improve the fluidity and moldability. However, in the case of phthalates such as dibutyl phthalate and dioctyl phthalate, phosphates such as tricresyl phosphate and diphenyl cresyl phosphate, and fatty acid esters such as butyl laurelate and butyl stearate, the flowability of polycarbonate and molding Although the effect of improving the properties is recognized, on the other hand, it is not always satisfactory in terms of compatibility and miscibility, and there are drawbacks such that the above-mentioned properties of the polycarbonate are significantly reduced.

[0004]

In view of the above-mentioned circumstances, the present invention does not reduce the excellent mechanical properties and heat resistance, which are the properties of polycarbonate, as much as possible, and is excellent in the effect of imparting compatibility and fluidity to polycarbonate. Another object of the present invention is to provide a lubricant for polycarbonate which is satisfactory in terms of the color tone of the lubricant itself, odor, heat stability and the like. Also,
An object of the present invention is to provide a polycarbonate composition having remarkably improved fluidity and moldability.

[0005]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems of the prior art, the present inventors have found that a specific rosin ester can serve as a lubricant that meets the above-mentioned object. It was found that a polycarbonate composition meeting the above purpose can be obtained by using it, and the present invention has been completed.

[0006] That is, the present invention relates to a lubricant for polycarbonate comprising purified stabilized rosin ester and purified stabilized rosin ester comprising alcohol compound and / or epoxy compound. Further, the present invention relates to a polycarbonate composition containing the above lubricant.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The lubricant of the present invention, as described above,
Excellent compatibility with polycarbonate, it is possible to impart fluidity without degrading the properties of the polycarbonate as much as possible, and moreover, it is selected from the viewpoint that it has good heating stability and is odorless. It consists of such specific rosin esters. The rosin esters are esterified products composed of purified and stabilized rosins and an alcohol compound and / or an epoxy compound. Preferably,
The color tone is Gardner 2 or less.

Specific examples of the rosin ester composed of the purified and stabilized rosin and an alcohol compound are disclosed in JP-A-63-186783, JP-A-3-277675, JP-A-5-171112 and JP-A-5-171112. 5-27
Various examples described in Japanese Patent Publication No. 9631, Japanese Patent Laid-Open No. 7-11194, etc. can be exemplified. Specific examples of the purified and stabilized rosin, which is a constituent of the esterified product of the purified and stabilized rosin and the epoxy compound, include disproportionated rosin such as disproportionated rosin, hydrogenated rosin, and dehydrogenated rosin. The purified and stabilized rosins obtained by removing the saponification products and impurities are applicable. More specifically, JP-A-64-8526
No. 5, JP-A-3-277675, JP-A-5-
2716222, JP-A-5-271621,
Various examples described in JP-A-6-329991 can be exemplified.

The alcohol compound which is a constituent of the rosin ester is not particularly limited, and various known polyhydric alcohols can be used. For example, ethylene glycol, diethylene glycol, triethylene glycol,
1,2-propanediol, 1,3-propanediol, 1,3-butanediol, 1,4-butanediol, neopentyl glycol, pentanediol, 3-
Various known saturated and unsaturated dihydric alcohols such as methyl-1,5-pentanediol, 1,6-hexanediol, octanediol, 1,4-butanediol, dipropylene glycol, bisphenol A and ethylene oxide or Dihydric alcohols obtained by adding propylene oxide; trihydric alcohols such as glycerin, trimethylolethane and trimethylolpropane; tetrahydric alcohols such as pentaerythritol and diglycerin; hexahydric alcohols such as dipentaerythritol. Alcohol; polyether polyols such as polymers and copolymers of ethylene oxide, propylene oxide, tetrahydrofuran and the like, which are initiated with aliphatic polyhydric alcohols such as ethylene glycol and glycerin, can be exemplified. These alcohol compounds may be used alone or in combination of two or more. Among these alcohol compounds, those having an aromatic ring are particularly preferable because the obtained rosin ester itself has good heating stability and extremely little deterioration in color tone, and further, mechanical properties and heat resistance of a polycarbonate composition containing the rosin ester. It is particularly preferable in terms of sex.

The epoxy compound which is a constituent of the rosin ester is not particularly limited, and various known monoepoxy compounds and polyepoxy compounds can be used. Examples of the monoepoxy compound include alkyl glycidyl ethers such as n-butyl glycidyl ether and 2-ethylhexyl glycidyl ether; aryl glycidyl ethers such as phenyl glycidyl ether; monocarboxylic acid glycidyl esters such as versatic acid glycidyl ester; Monocarboxylic acid glycidyl esters such as glycidyl ester; styrene oxide, cyclohexene oxide and the like can be mentioned. As the diepoxy compound, for example, ethylene glycol diglycidyl ether, diethylene glycol diglycidyl ether, triethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether,
Propylene glycol diglycidyl ether, dipropylene glycol diglycidyl ether, tripropylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, butanediol diglycidyl ether, neopentyl glycol diglycidyl ether, 1,6-hexanediol diglycidyl ether, etc. Acyclic aliphatic diglycidyl ethers; 2,2
-Bis (4-hydroxyphenyl) propane diglycidyl ether, bisphenol A high molecular weight epoxy resin, bis (4-hydroxyphenyl) methane diglycidyl ether, 1,1-bis (4-hydroxyphenyl)
Ethane diglycidyl ether, 2,2-bis (4-hydroxycyclohexyl) propane diglycidyl ether, 3,3 ′, 5,5′-tetramethyl-4,4′-dihydroxybiphenyl diglycidyl ether, 2,2-
Aromatic or cycloaliphatic diglycidyl ethers such as bis (4- (β-hydroxypropoxy) phenyl) propane diglycidyl ether, resorcinol diglycidyl ether, phthalic anhydride diglycidyl ester, hexahydrophthalic anhydride diglycidyl ester, etc. Aromatic or cycloaliphatic diglycidyl esters; 3,4
-Depoxy compounds such as cycloaliphatic cyclic oxiranes such as epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate and vinylcyclohexenedioxide. Examples of the triepoxy compound include trimethylolethane triglycidyl ether, trimethylolpropane triglycidyl ether, glycerin triglycidyl ether, trishydroxyethyl isocyanurate triglycidyl ether,
Examples thereof include trihydroxybiphenyl triglycidyl ether and trimellitic acid triglycidyl ester. Further, as the tetraepoxy compound, for example, 1,
1,2,2-tetra (4-hydroxyphenyl) ethane tetraglycidyl ether, bisresorcinol tetraglycidyl ether and the like can be mentioned. Examples of other polyepoxy compounds include sorbitol polyglycidyl ether and polyglycidyl ether of phenol novolac type resin. These epoxy compounds are 1
They may be used alone or in combination of two or more. Among these epoxy compounds, those having an aromatic ring are particularly preferable because the obtained rosin ester itself has good heating stability and extremely little deterioration in color tone, and further, the mechanical properties and heat resistance of the polycarbonate composition containing the rosin ester. It is particularly preferable in terms of sex.

The reaction between the alcohol compound and / or the epoxy compound and the purified and stabilized rosin is not particularly limited and can be easily carried out by adopting known reaction conditions. For example, the reaction between the alcohol compound and the purified and stabilized rosin is usually carried out in the equivalent ratio [-OH (eq) /-of the hydroxyl group of the alcohol compound and the carboxyl group of the rosin.
COOH (eq)] is adjusted to about 0.8 to 2.0, and then heated to about 150 ° C. to 280 ° C. under an inert gas stream, and known esterification is performed while distilling generated water out of the system. Esterification may be performed in the presence or absence of a catalyst. Further, as a specific example of the reaction between the epoxy compound and the rosin, OH (the total of the hydroxyl group and the hydroxyl group derived from the epoxy group) is defined as one epoxy group in the polyepoxy compound usually corresponding to two hydroxyl groups. / COOH ratio from 0.8 to
Within a range of 22, a predetermined amount of rosin and a polyepoxy compound are charged, and in the presence or absence of an epoxy ring-opening catalyst,
Usually, under a nitrogen stream, the reaction temperature is 120 to 200 ° C.
The ring-opening addition reaction is carried out to some extent. When the OH (hydroxyl group derived from epoxy group) / COOH ratio is smaller than 2, the reaction temperature is further raised to 230 to 260 ° C at the stage where the epoxy group is considered to be completely ring-opened, and the hydroxyl group (epoxy group The esterification reaction may be carried out until the acid value becomes 5 or less, preferably 3 or less by esterifying the rosin with the rosin generated by ring opening). The above reaction can be carried out in the presence or absence of a solvent. Examples of the solvent include aromatic hydrocarbons such as benzene, xylene and toluene. In the esterification step, if necessary, for example, various known stabilizers such as organic phosphorus compounds and esterification accelerators can be added.

The polycarbonate used in the present invention is not particularly limited, and various known ones can be used. Examples include homopolymers or copolymers obtained by reacting a dihydric phenol with a carbonate precursor, and mixtures thereof. The molecular weight of the resin is not particularly limited, but is usually 20,000 to 400.
A value of about 00 is suitable.

Examples of the dihydric phenol include, for example,
Bisphenol A [ie, 2,2-bis (4-hydroxyphenyl) -propane], bis (4-hydroxyphenyl) methane, 2,2-bis (4-hydroxy-3-methylphenyl) propane, 4,4- Bis (4-hydroxyphenyl) heptane, 2,2- (3,5,3 ', 5'
-Tetrabromo-4,4'-dihydroxydiphenyl)
Propane, 2,2- (3,5,3 ', 5'-tetrachloro-4,4'-dihydroxydiphenyl) propane,
(3,3′-dichloro-4,4′-dihydroxydiphenyl) methane and the like can be mentioned. Furthermore, for example, U.S. Pat. Nos. 2,999,835, 3,028,365, and 333.
The dihydric phenols described in the specification of No. 4154 and the like can also be used. These dihydric phenols may be used alone or in combination of two or more.

As the carbonate precursor, any of carbonyl halide, carbonate ester and haloformate can be used. Examples of the carbonyl halide include carbonyl chloride, carbonyl bromide, and a mixture thereof. Phosgene corresponds to the carbonyl chloride. Examples of the carbonate ester include diphenyl carbonate; di- (chlorophenyl) carbonate, di- (bromophenyl) carbonate, di- (trichlorophenyl) carbonate, and di- (halophenyl) carbonate such as di- (tribromophenyl) carbonate. Di- (alkylphenyl) carbonate such as di- (tolyl) carbonate; di- (naphthyl) carbonate, di- (chloronaphthyl) carbonate, phenyltolylcarbonate, chlorophenylchloronaphthylcarbonate, etc., each of which may be used alone. Or a mixture of two or more. Examples of the haloformate include bishaloformate of dihydric phenol such as bischloroformate of hydroquinone; and bishaloformate of glycol such as ethylene glycol, neopentyl glycol, and polyethylene glycol. They can be used alone or in combination of two or more. Other carbonate precursors include polymeric derivatives of dihydric phenols, dicarboxylic acids and carbonic acids (US Pat.
169121) can also be used.

The method for producing the polycarbonate used in the present invention is not particularly limited, and conventionally known methods can be adopted. For example, the dihydric phenol and the carbonate precursor may be polymerized in the presence of a molecular weight modifier, an acid acceptor and a catalyst. Examples of the molecular weight regulator include monohydric phenols such as phenol, p-tert-butylphenol and p-bromophenol;
Examples thereof include primary or secondary amines. Examples of the acid acceptor include organic tertiary amines such as pyridine, triethylamine, dimethylaniline and tributylamine, and hydroxides, carbonates, bicarbonates and phosphates of alkali or alkaline earth metals. . Further, the catalyst is not particularly limited as long as it enhances the polymerization reactivity of the dihydric phenol and the carbonate precursor, and specifically, triethylamine, tripropylamine, N, N-
Examples include tertiary amines such as dimethylaniline; quaternary ammonium compounds such as tetraethylammonium chloride, tetraethylammonium bromide and benzyltrimethylammonium chloride; quaternary phosphonium compounds such as n-butyltriphenylphosphonium.

The polycarbonate composition of the present invention will be described below. The composition of the present invention contains the polycarbonate and a lubricant containing the purified and stabilized rosin ester as essential components. The amount of the lubricant used cannot be unambiguously determined because it varies depending on the intended use of the molded article, but is usually about 0.1 to 67 parts, preferably 0.5 to 20 parts by weight per 100 parts by weight of the polycarbonate. Parts by weight. If the amount of the lubricant used is less than 0.1 part by weight, no improvement in fluidity is observed, and if it exceeds 67 parts, the mechanical properties and heat resistance deteriorate.

In the polycarbonate composition of the present invention, if necessary, a fibrous reinforcing agent, an inorganic filler, an antioxidant,
An ultraviolet absorber, an antistatic agent, a nucleating agent, a dispersant, a coloring agent and the like can be added.

As the fibrous reinforcing agent, glass fiber,
Inorganic fibers other than glass fibers, carbon fibers, heat resistant organic fibers and the like can be mentioned. Specifically, the fiber diameter is 1 to 20.
μm, chopped strands of glass fibers or carbon fibers having a fiber length of 10 mm or less, glass fiber milled fibers, pitch-based carbon fibers, aromatic polyamide fibers, aromatic polyimide fibers, aromatic polyamideimide fibers, and combinations thereof. Although useable, chopped strands of glass fiber are particularly preferred.

As the inorganic filler, talc, powdered feldspar, zinc oxide, magnesium oxide, calcium silicate,
Examples thereof include magnesium silicate, calcium sulfate, barium sulfate, calcium carbonate, powdered quartz, diatomaceous earth, kaolin and mica.

A preferred blending ratio of the polycarbonate composition of the present invention is 30 to 99.9 of polycarbonate.
% By weight, 0.1 to 20% by weight of the rosin ester lubricant, 0 to 50% by weight of fibrous reinforcing agent, and 0 of inorganic filler.
To 50% by weight. More preferably, the polycarbonate is 50 to 90% by weight, and the rosin ester lubricant is 0.1.
5 to 10% by weight, fibrous reinforcing agent 0.5 to 40% by weight and inorganic filler 0.5 to 40% by weight.

When blending the lubricant of the present invention with a polycarbonate, the mixing method is not particularly limited, and various known mixing methods can be adopted. That is, pellets, powder or crushed polycarbonate, the lubricant of the present invention and optionally a fibrous reinforcing agent, an inorganic filler and the like are blended in the above-mentioned use ratio, after uniformly mixing using a high-speed stirrer, etc., uniaxially or Examples thereof include a method of melt-kneading with a multi-screw extruder and a method of melt-kneading with a Banbury mixer or a rubber roll machine. The thus obtained polycarbonate composition of the present invention can be used by molding it into a desired shape such as various molded products such as sheets, fibrous materials and tubular materials.

[0022]

According to the present invention, it is possible to remarkably improve the fluidity of polycarbonate while maintaining the properties of polycarbonate at a high level.
Moreover, a lubricant that is odorless and has excellent heat stability can be provided. By blending the lubricant, a polycarbonate composition having excellent moldability can be provided. The composition can be used as an engineering plastic, for example, automobile parts, electronic / electrical equipment parts, and various molded products required to have rigidity, heat resistance, dimensional stability and the like.

[0023]

EXAMPLES The present invention will be described in more detail below with reference to production examples, examples and comparative examples, but the present invention is not limited to these examples. Below, unless otherwise specified
Parts and percentages are by weight.

Production Example 1 (Preparation of Purified and Stabilized Rosin) (1) Disproportionation Reaction Acid value of 172.5, softening point of 75 ° C., 1000 parts of unpurified Chinese-made gum rosin with color tone Gardner 6 and 5% palladium carbon as a catalyst (Water content of 50%) 0.3 part was added, and the mixture was stirred at 280 ° C. for 4 hours under a nitrogen blanket to carry out a disproportionation reaction. Acid value 157.3, softening point 77 ° C., color tone Gardner 8
Of disproportionated rosin was obtained. (2) Purification The disproportionated rosin was distilled under a nitrogen blanket under a reduced pressure of 3 mmHg to purify the main distillate shown in Table 1 having an acid value of 178.3, a softening point of 85 ° C. and a general constant of color Gardner 4. Disproportionate rosin. (3) Hydrogenation reaction 200 parts of the above-mentioned purified disproportionated rosin and 0.4 part of 5% palladium carbon (water content 50%) were charged into a shaking autoclave to remove oxygen in the system, and then the system was hydrogenated. At 1
Pressurize to 00 kg / cm ² and raise the temperature to 260 ℃,
Hydrogenation reaction is carried out for an hour, acid value 168.9, softening point 8
A purified and stabilized rosin (R1) having a color tone of Gardner 1 or less (Hazen color 50) at 6 ° C. was obtained.

Production Example 2 (Preparation of purified stabilized rosin) (1) Hydrogenation reaction Unpurified Chinese gum rosin 1000 described in Production Example 1 (1)
Parts and 2 parts of 5% palladium carbon (water content 50%) as a hydrogenation catalyst were charged into a shaking autoclave to remove oxygen in the system, and then 100 kg / cm ^{2 of} hydrogen in the system.
The mixture was heated to 260 ° C. with stirring, and hydrogenated at the same temperature for 3 hours to give an acid value of 167.2 and a softening point of 74.
C., an unpurified hydrogenated rosin having a color Gardner 5 was obtained. (2) Purification The above crude hydrogenated rosin was distilled under a nitrogen blanket under a reduced pressure of 3 mmHg to give an acid value of 175.2, a softening point of 83 ° C., and a main distillation fraction shown in Table 2 having a general constant of color Gardner 2. Was purified hydrogenated rosin. (3) Dehydrogenation reaction 200 parts of the above-mentioned purified hydrogenated rosin and 0.1 part of 5% palladium carbon (water content 50%) as a dehydrogenation catalyst were charged into a shaking autoclave, and the atmosphere was replaced with nitrogen. After removing the oxygen of the above, the temperature in the system was raised to 250 ° C., and the dehydrogenation reaction was performed at the same temperature for 3 hours to obtain an acid value of 172.6.
A purified and stabilized rosin (R2) having a softening point of 84 ° C. and a color tone of Gardner 1 or less (Hazen color 80) was obtained.

Example 1 (Preparation of Purified and Stabilized Rosin Ester) 500 parts of the purified disproportionated rosin obtained in Production Example 1 (2) was charged into a flask, heated to 180 ° C. under a nitrogen blanket, and melted and stirred. After adding 60 parts of glycerin at 200 ° C. to 280
The temperature is raised to 0 ° C, the esterification is performed at the same temperature, and the acid value is 2.
5, a softening point of 99 ° C., and a purified disproportionated rosin ester having a color tone of Gardner 5 were obtained. The rosin ester was hydrogenated under the same reaction conditions as in Production Example 1 (3) to give an acid value of 2.8.
A purified and stabilized rosin ester (RE1) having a softening point of 99 ° C. and a color tone of Gardner 1 or less (Hazen color 150) was obtained.

Example 2 (Preparation of purified stabilized rosin ester) 500 parts of the purified disproportionated rosin obtained in Preparation Example 1 (2) and 336 parts of bisphenol A propylene oxide 2 mol adduct (hydroxyl value 318) were added to a flask. And esterified under a nitrogen stream at 250 ° C to give an acid value of 2.0 and a softening point of 9
A purified disproportionated rosin ester having a color tone of Gardner 5 was obtained at 0 ° C. The rosin ester was hydrogenated under the same reaction conditions as in Production Example 1 (3) to give an acid value of 2.5, a softening point of 88 ° C.,
Color tone Gardner color 1 or less (Hazen color 100)
To obtain purified and stabilized rosin ester (RE2).

Example 3 (Preparation of purified and stabilized rosin ester) The purified and stabilized rosin (R2) 20 obtained in Production Example 2 (3)
0 part, 592.2 parts of high molecular weight bisphenol A type epoxy resin (epoxy equivalent 935.3) and 0.19 part of triphenylphosphine were charged into a flask and esterification was carried out at 160 ° C. under a nitrogen stream to obtain an acid value. 0.6, softening point 1
14 ° C, color tone Gardner 1 or less (Hazen color 22
The purified stabilized rosin ester (RE3) of 5) was obtained.

Comparative Example 1 The crude disproportionated rosin obtained in Production Example 1 (1) was used for esterification under the same esterification conditions as in Example 1, and then in Production Example 2 (1). Hydrogenation was performed under the same conditions as the hydrogenation conditions to obtain an unpurified stabilized rosin ester (RE4) having an acid value of 2.5, a softening point of 88 ° C. and a color Gardner 6.

Comparative Example 2 The same unpurified rosin used in Production Example 1 (1) was used, and this was subjected to esterification and hydrogenation under the same esterification conditions and hydrogenation conditions as in Example 1 to obtain an acid. A crude rosin ester (RE5) having a value of 2.0, a softening point of 84 ° C. and a color tone Gardner 7 was obtained.

(Preparation of Polycarbonate Composition) Aromatic polycarbonate having a molecular weight of 20,000 (2,2-bis-
(4-Hydroxyphenyl) -propane / phosgene polymer) 100 parts, various rosin esters obtained in the above Examples or Comparative Examples, and a fiber diameter of 13 μm and a fiber length of 3
mm glass fibers were mixed in the proportions shown in Table 3, respectively, and V
After mixing well in a mold blender, mix the mixture to a diameter of 30
mm single screw extruder and melt-mixed at a cylinder temperature of 290 ° C. to obtain pellets of a polycarbonate composition.
Cylinder temperature 290 ℃, mold temperature 8
A test piece was prepared by injection molding at 0 ° C.

(Performance Evaluation) The test pieces obtained above were used for impact strength, heat resistance and fluidity tests. The results of these evaluations are shown in Table 3. In addition, the odor and heat stability were evaluated using the rosin esters obtained in the above Examples and Comparative Examples. Table 4 shows the results.

(Impact Strength) The Izod impact strength (with notch and E method) of the test pieces having a thickness of 1/4 inch and 1/8 inch was measured according to ASTM D256. (Heat resistance) The deflection temperature under load (18.6 kg / cm ² load) was measured according to ASTM D648. (Fluidity) Flow rate 8m under constant pressure of 1500kgf / cm ^2.
m, flow path thickness 1mm, using Archimedes type spiral flow mold, mold temperature 80 ℃, cylinder temperature 280 ℃
And at 300 ° C. (Odor) Each rosin ester has an inner diameter of 1.5 cm and a height of 15 cm.
The test tube was put in a test tube of No. 2 and allowed to stand in a circulating air dryer at 200 ° C. without melting, and after melting, the odor was sniffed and judged according to the following criteria. ◯: No odor △: Slight odor ×: Strong odor (heating stability) Each rosin ester was put in a test tube with an inner diameter of 1.5 cm and a height of 15 cm, and allowed to stand in a circulating air dryer at 200 ° C. without a lid. Then, the change in color tone (Gardner) with time was observed.

[0034]

[Table 1]

[0035]

[Table 2]

[0036]

[Table 3]

[0037]

[Table 4]

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[Procedure amendment]

[Submission date] June 24, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Name of invention

[Correction method] Change

[Correction contents]

Title: Polycarbonate lubricant and polycarbonate composition containing the same

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location (C08L 69/00 93:04)

Claims (5)

[Claims] 1. A lubricant for polycarbonate comprising purified stabilized rosin ester and purified stabilized rosin ester comprising alcohol compound and / or epoxy compound. 2. The lubricant according to claim 1, wherein the purified and stabilized rosin ester has a Gardner color tone of 2 or less. 3. In a purified and stabilized rosin ester,
The lubricant according to claim 1 or 2, wherein the alcohol compound and the epoxy compound have an aromatic ring. 4. A polycarbonate composition containing the lubricant according to claim 1. 5. Polycarbonate 30 to 99.9% by weight, lubricants 0.1 to 20 according to claim 1.
A composition according to claim 4, which comprises 0% to 50% by weight of fibrous reinforcing agent and 0 to 50% by weight of inorganic filler.