JPH0726149A - Glass fiber-reinforced polycarbonate-based resin composition - Google Patents

Abstract

PURPOSE:To obtain a polycarbonate-based resin composition excellent in mechanical strength such as flexural strength and tensile strength at break, visual appearance of the surface, impact strength and heat stability. CONSTITUTION:This polycarbonate-based resin composition is composed of (A) a polycarbonate-polyorganosiloxane copolymer, (B) a polycarbonate resin and (C) glass fiber treated with an epoxy resin-containing binder. The polyorganosiloxane in the component (A) is contained in a specified amount based on the total amount of the components (A) and (B).

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a glass fiber reinforced polycarbonate resin composition. More specifically, the present invention relates to a polycarbonate-based resin composition which is excellent in mechanical strength such as bending strength and tensile breaking strength and surface appearance, and is also excellent in impact resistance or impact resistance and thermal stability.

[0002]

2. Description of the Related Art Polycarbonate resins are excellent in mechanical strength, electrical characteristics, transparency, etc. and are widely used as engineering plastics in various fields such as electric / electronic equipment fields and automobile fields. Has been done. As a polycarbonate resin having such characteristics, a glass fiber reinforced polycarbonate resin containing glass fiber is known in order to improve impact resistance and dimensional stability. However, the polycarbonate resin can be added by adding glass fiber.
It has a drawback that the impact resistance is significantly reduced. Heretofore, various studies have been made on a method of improving the impact resistance which is lowered by adding the glass fiber to a polycarbonate resin. For example, JP-A-55-160052 and JP-A-2-173061 disclose methods for introducing a polycarbonate-polyorganosiloxane copolymer into a polycarbonate resin. The impact resistance is improved by introducing this polycarbonate-polyorganosiloxane copolymer. However, the effect of improving the impact resistance is not yet sufficient, and its improvement is desired.

[0003]

Therefore, the present inventors have
In view of the above situation, the drawbacks of the conventional method are solved, the bending strength,
In order to develop a polycarbonate-based resin composition having excellent mechanical strength such as tensile strength at break and surface appearance, as well as excellent impact resistance or impact resistance and thermal stability, intensive research was conducted. As a result, a polycarbonate-based resin composition containing a polycarbonate-polyorganosiloxane copolymer as an essential component and a specific glass fiber treated with a sizing agent containing an epoxy resin has desired properties. Found. The present invention has been completed based on such findings.

That is, the present invention was treated with a sizing agent containing (A) a polycarbonate-polyorganosiloxane copolymer of 5 to 95% by weight, (B) a polycarbonate resin of 0 to 90% by weight, and (C) an epoxy resin. It is composed of 5 to 60% by weight of glass fiber, and the proportion of the polyorganosiloxane part in the component (A) is 0.5 to 40% by weight based on the total amount of the components (A) and (B). The present invention provides a polycarbonate resin composition characterized by the following.

First, the polycarbonate-polyorganosiloxane copolymer (PC-PDMS copolymer) as the component (A) which constitutes the polycarbonate resin composition of the present invention.
Are various, but are preferably the general formula (I)

[0006]

[Chemical 1]

[Wherein R ¹ and R ² are each a halogen atom (eg, chlorine, bromine, fluorine, iodine) or an alkyl group having 1 to 8 carbon atoms (eg, methyl group, ethyl group,
Propyl group, n-butyl group, isobutyl group, amyl group,
Isoamyl group, hexyl group, etc.), which may be the same or different. m and n are
When each is an integer of 0 to 4 and m is 2 to 4,
R ¹ may be the same or different from each other, and when n is 2 to 4, R ² may be the same or different from each other. And Z has 1 to 1 carbon atoms.
8 alkylene group or C 2-8 alkylidene group (for example, methylene group, ethylene group, propylene group, butylene group, penterylene group, hexylene group, ethylidene group, isopropylidene group, etc.), cycloalkyl having 5 to 15 carbon atoms An alkylene group or a cycloalkylidene group having 5 to 15 carbon atoms (for example, a cyclopentylene group, a cyclohexylene group, a cyclopentylidene group, a cyclohexylidene group, etc.), or —SO ₂ —, —SO—, —S—, -O
-, -CO- bond or general formula (II) or (II ')

[0008]

[Chemical 2]

The bond represented by ] Polycarbonate part having a repeating unit represented by the general formula
(III)

[0010]

[Chemical 3]

[Wherein R ³ , R ⁴ and R ⁵ are each a hydrogen atom or an alkyl group having 1 to 5 carbon atoms (eg, methyl group, ethyl group, propyl group, n-butyl group, isobutyl group, etc.) Or a phenyl group, which may be the same or different. Further, p and q are each an integer of 0 or 1 or more. ] It consists of a polyorganosiloxane part having a repeating unit represented by the following formula. Here, the degree of polymerization of the polycarbonate part is
3 to 100 is preferable, and the degree of polymerization of the polyorganosiloxane part is preferably 2 to 500. PC-P above
The DMS copolymer comprises a polycarbonate part having a repeating unit represented by the general formula (I) and a general formula (II
A block copolymer comprising a polyorganosiloxane moiety having a repeating unit represented by I), having a viscosity average molecular weight of 10,000 to 40,000, preferably 12,000.
0 to 35,000, more preferably 14,000 to 35,000
It is 0.

Such a PC-PDMS copolymer may be prepared, for example, by a polycarbonate oligomer (PC oligomer) which constitutes a pre-manufactured polycarbonate part and a polyorgano having a reactive group at a terminal which constitutes a polyorganosiloxane part. Siloxane (for example, polydialkylsiloxane such as polydimethylsiloxane (PDMS), polydiethylsiloxane or polymethylphenylsiloxane) is dissolved in a solvent such as methylene chloride, chlorobenzene and chloroform, and an aqueous sodium hydroxide solution of bisphenol is added. The catalyst can be produced by an interfacial polycondensation reaction using triethylamine or trimethylbenzylammonium chloride as a catalyst. Further, a polycarbonate-polyorganosiloxane copolymer produced by the method described in JP-B-44-30105 or the method described in JP-B-45-20510 can also be used. Here, the PC oligomer having the repeating unit represented by the general formula (I) can be prepared by the general formula (IV) in the solvent method, that is, in the presence of a known acid acceptor and a molecular weight modifier in a solvent such as methylene chloride.

[0013]

[Chemical 4]

[In the formula, R ¹ , R ² , Z, m and n are the same as defined above. ] It can manufacture by the reaction of the dihydric phenol and carbonate precursor like phosgene represented by these, or the transesterification reaction of the dihydric phenol and carbonate precursor like diphenyl carbonate. Here, there are various dihydric phenols represented by the above general formula (IV), but 2,2-bis (4-hydroxyphenyl) propane [bisphenol A] is particularly preferable. Further, a part or all of bisphenol A may be replaced with another dihydric phenol. As dihydric phenols other than bisphenol A,
Bis (4-hydroxyphenyl) alkanes other than bisphenol A; 4,4'-dihydroxydiphenyl; bis (4-hydroxyphenyl) cycloalkane; bis (4-hydroxyphenyl) sulfide; bis (4-hydroxyphenyl) sulfone; bis (4-hydroxyphenyl) sulfoxide; bis (4-hydroxyphenyl) ether; compounds such as bis (4-hydroxyphenyl) ketone or bis (3,5-dibromo-4-hydroxyphenyl) bropane; bis (3,5 -Dichloro-
Examples thereof include halogenated bisphenols such as 4-hydroxyphenyl) bropan. In addition to these, examples of the dihydric phenol include hydroquinone.

In the present invention, the PC oligomer used for producing the PC-PDMS copolymer may be a homopolymer using one of the above dihydric phenols.
It may be a copolymer of two or more species. Further, it may be a thermoplastic random branched polycarbonate obtained by using a polyfunctional aromatic compound in combination with the dihydric phenol. The proportion of the polyorganosiloxane part in the component (A) is 0.5 to 40% by weight, preferably 0.8 to 35% by weight, based on the total amount of the components (A) and (B). , And more preferably 1.0 to 15% by weight. Here, if it is less than 0.5% by weight, the effect of improving impact resistance is not observed. On the other hand, if it exceeds 40% by weight, a copolymer having a sufficient molecular weight cannot be obtained.

Next, the polycarbonate resin (P) as the component (B) which constitutes the polycarbonate resin composition of the present invention.
C) can be easily produced by reacting a dihydric phenol with phosgene or a carbonate compound. That is, for example, by reacting a dihydric phenol with a carbonate precursor such as phosgene in a solvent such as methylene chloride in the presence of a known acid acceptor or a molecular weight regulator, or by reacting dihydric phenol with diphenyl carbonate. It is produced by a transesterification reaction with another carbonate precursor. Here, the dihydric phenol may be the same as or different from the compound represented by the general formula (IV) described above. Examples of the carbonic acid ester compound include diaryl carbonate such as diphenyl carbonate and dialkyl carbonate such as dimethyl carbonate and diethyl carbonate.

On the other hand, the PC-PDMS copolymer or PC
At the same time, as the glass fiber of the component (C) constituting the polycarbonate resin composition of the present invention, a glass fiber obtained by pre-focusing the glass fiber with a sizing agent containing an epoxy resin is used. Here, the glass fiber used for the focusing treatment with the sizing agent containing an epoxy resin may be any of alkali-containing glass, low-alkali glass and non-alkali glass. There are no particular restrictions on its form,
For example, any of roving, chopped strand, milled fiber and the like can be used. The average fiber diameter is 1 to 30 μm, preferably 5 to 2
It is 5 μm. The glass fiber in the present invention is, first,
Such a glass fiber is treated with a sizing agent containing an epoxy resin as a component, and is bundled into about 100 to 1,000 strands to form a strand. Then, a chopped strand obtained by cutting the obtained strand into an average fiber length of 1 to 8 mm, preferably about 3 to 6 mm is used. On the other hand, as the sizing agent containing the epoxy resin used for the sizing treatment of the glass fiber, the epoxy resin can be used alone, or various kinds of the epoxy resin and other resins can be used in combination. . There are various types of epoxy resins. For example, bisphenol / epichlorohydrin type epoxy resin, glycidyl ether type epoxy resin, tetraepoxy resin, novolac type epoxy resin,
Examples thereof include epoxy resins such as glycidyl amine, epoxy alkyl ester, and epoxidized unsaturated compound. And as another resin which can be used together with these epoxy resins, urethane resin is mentioned. Here, there are various urethane resins that can be used in combination with the epoxy resin, such as a polyaddition product of a polyether having a hydroxyl group at both ends with a diisocyanate (polyether type), or a polyester having a hydroxyl group at both ends. And a polyisocyanate of diisocyanate (polyester type) can be used. In the case of a polyether urethane resin, examples of the polyether include polypropylene glycol having a molecular weight of 1,000 to 2,000 and poly-1,4-butylene glycol. In the case of the polyester-based urethane resin, examples of the polyester include a condensation polymer of ethylene glycol and adipic acid. On the other hand, as the diisocyanate, 2,6-tolylene diisocyanate (TDI), diphenylmethane-4,4′-diisocyanate (MDI), hexamethylene diisocyanate or the like can be used. Then, when the epoxy resin and the urethane resin are used together, the use ratio of both resins is arbitrary and may be appropriately determined according to the situation etc.
Epoxy resin: urethane resin = 1 to 4: 5
1 (weight ratio). There is no particular limitation on the method for bundling the glass fibers using these sizing agents, and any conventionally used method, for example, dip coating, roller coating, spray coating, flow coating, spray coating, or any other method. Can be used.

In order to improve the affinity with the resin, the glass fiber is a silane type such as aminosilane type, epoxysilane type, vinylsilane type, methacrylsilane type, titanate type, aluminum type, chromium type, zirconium type or borane type. It may be surface-treated with the coupling agent. Among these, silane coupling agents and titanate coupling agents are preferable, and silane coupling agents are particularly preferable. As the above-mentioned suitable silane coupling agent, specifically, triethoxysilane, vinyltris (β-methoxyethoxy) silane,
γ-methacryloxypropyltrimethoxysilane, γ-
Glycidoxypropyltrimethoxysilane, β- (3,
4-epoxycyclohexyl) ethyltrimethoxysilane, N-β- (aminoethyl) -γ-aminopropylmethyldimethoxysilane, γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropylmethymethoxysilane, γ-mercapto Examples include propylmethymethoxysilane and γ-chloropropyltrimethoxysilane. Among these, γ-aminopropyltriethoxysilane and N-β- (aminoethyl) -γ-aminopropyltrimethoxysilane are preferably used. The method of surface-treating the glass fiber with the coupling agent is not particularly limited, and any conventionally used method such as an aqueous solution method, an organic solvent method, or a spray method may be used. it can. The amount of the sizing agent and the coupling agent used is not particularly limited, but the total amount thereof is usually 0.
It is used so as to be 1 to 1.5% by weight.

The polycarbonate resin composition of the present invention comprises the above-mentioned components (A), (B) and (C). The mixing ratio of these components is the polycarbonate-polyorganosiloxane which is the component (A). Copolymer 5-95
% By weight, preferably 10 to 90% by weight, 0 to 90% by weight of the component (B) polycarbonate resin, preferably 0
It is 5 to 60% by weight, preferably 10 to 50% by weight, of the glass fiber which has been subjected to the bundling treatment with a sizing agent containing -80% by weight and an epoxy resin as the component (C). Here, when the blending ratio of the glass fiber as the component (C) is less than 5% by weight, the dimensional stability is lowered, and at the same time, the effect of improving the rigidity is small and the desired mechanical strength cannot be obtained. On the other hand, if it exceeds 60% by weight, it is difficult or impossible to knead the resin, which is not preferable.

The resin composition of the present invention contains, in addition to the above-mentioned components (A), (B) and (C), if necessary,
As the component (D), various additives can be blended within a range that does not impair the object of the present invention. For example, various additives include antioxidants such as hindered phenol-based, phosphite-based, phosphate-based, and amine-based antioxidants, ultraviolet absorbers such as benzotriazole-based and benzophenone-based antioxidants, and hindered amine-based light-absorbing agents. Examples include stabilizers, external lubricants such as aliphatic carboxylic acid ester-based and paraffin-based lubricants, commonly used flame retardants, release agents, antistatic agents, and colorants.

The resin composition of the present invention can be obtained by mixing the above-mentioned components (A), (B) and (C) with the component (D), if necessary, and kneading. The compounding and kneading are methods commonly used, for example, a method using a ribbon blender, a Henschel mixer, a Banbury mixer, a drum tumbler, a single-screw extruder, a twin-screw extruder, a co-kneader, a multi-screw extruder. Can be done by. The heating temperature for kneading is usually selected in the range of 250 to 300 ° C.
The polycarbonate resin composition thus obtained can be applied by various known molding methods such as injection molding, blow molding, extrusion molding, compression molding, calender molding, rotational molding, and the like. It can be used to manufacture molded articles, molded articles for automobiles such as automobile glass and sunroofs, or molded articles for electric / electronic fields.

[0022]

The present invention will be further described in detail with reference to production examples, examples and comparative examples. Production Example 1-1 [Production of PC oligomer A] 5% by weight of 400 liters
60 kg of bisphenol A was dissolved in a sodium hydroxide aqueous solution to prepare a sodium hydroxide aqueous solution of bisphenol A. Then, the aqueous sodium hydroxide solution of bisphenol A kept at room temperature was passed through the orifice plate at a flow rate of 138 liters / hour and methylene chloride at a flow rate of 69 liters / hour through a tubular reactor having an inner diameter of 10 mm and a tube length of 10 m. It was introduced, and phosgene was co-currently flown thereinto and blown at a flow rate of 10.7 kg / hour to continuously react for 3 hours. The tubular reactor used here was a double tube, and cooling water was passed through the jacket to keep the discharge temperature of the reaction solution at 25 ° C. The pH of the discharged liquid is 10 to 11
Was adjusted so that The reaction liquid thus obtained was allowed to stand still to separate and remove the aqueous phase, and a methylene chloride phase (220 liters) was collected. To this, 170 liters of methylene chloride was further added and sufficiently stirred. This was designated as PC oligomer A (concentration: 317 g / liter). The degree of polymerization of the PC oligomer A obtained here is 3 to 4
Met.

Production Example 2-1 [Production of Reactive PDMS-A] 1,483 g of octamethylcyclotetrasiloxane, 96 g of 1,1,3,3-tetramethyldisiloxane and 35 g of 86% sulfuric acid were mixed. The mixture was stirred at room temperature for 17 hours. After that, the oil phase is separated and
5 g of sodium hydrogen carbonate was added and stirred for 1 hour. After filtration, vacuum distillation was performed at 150 ° C. and 3 torr to remove low-boiling substances to obtain oil. 60 g of 2-allylphenol and 0.0
To a mixture of 014 g of platinum chloride-platinum as an alcoholate complex, 294 g of the oil obtained above was added.
Added at a temperature of ° C. The mixture was stirred for 3 hours while maintaining the temperature of 90 to 115 ° C. The product was extracted with methylene chloride and washed 3 times with 80% aqueous methanol to remove excess 2-allylphenol. The product was dried over anhydrous sodium sulphate and evaporated in vacuo to a temperature of 115 ° C. The obtained terminal phenol PDMS is N
According to the measurement of MR, the number of repeating dimethylsilanooxy units was 30.

Production Example 2-2 [Synthesis of Reactive PDMS-B] In Production Example 2-1
The procedure of Production Example 2-1 was repeated, except that the amount of 1,1,3,3-tetramethyldisiloxane was changed to 18.1 g. In the obtained terminal phenol PDMS, the number of repeating dimethylsilanooxy units was 150 as measured by NMR.

Production Example 2-3 [Synthesis of Reactive PDMS-C] In Production Example 2-1
Example 1 was repeated except that the amount of 1,1,3,3-tetramethyldisiloxane was changed to 7.72 g. In the obtained terminal phenol PDMS, the number of repeating dimethylsilanooxy units was 350 as determined by NMR.

Production Example 3-1 [Production of PC-PDMS Copolymer A ₁ ] 160 g of the reactive PDMS-A obtained in Production Example 2-1 was mixed with methylene chloride 2
It was dissolved in 1 liter and 10 liters of the PC oligomer obtained in Production Example 1 was mixed. There sodium hydroxide 26
What melt | dissolved g in 1 liter of water and 5.7 cc of triethylamine were added, and it was made to react by stirring at 500 rpm for 1 hour at room temperature. After completion of the reaction, 600 g of bisphenol A dissolved in 5 liter of a 5.2 wt% sodium hydroxide aqueous solution, 8 liter of methylene chloride and 81 g of p-tert-butylphenol were added to the above reaction system,
The mixture was stirred and reacted at 0 rpm at room temperature for 1 hour. After the reaction
Add 5 liters of methylene chloride, wash with 5 liters of water, wash with 5 liters of 0.01N sodium hydroxide aqueous solution with alkali, wash with 5 liters of 0.1N hydrochloric acid, and wash with 5 liters of water. Finally, methylene chloride was removed to obtain a chip-shaped PC-PDMS copolymer.

Production Example 3-2 [Production of PC-PDMS Copolymer A ₂ ] Production Example 3-1 except that reactive PDMS-A was changed to reactive PDMS-B in Production Example 3-1. Similarly, chip PC
-PDMS copolymer was obtained.

Production Example 3-3 [Production of PC-PDMS Copolymer A ₃ ] Production Example 3-1 except that reactive PDMS-A was changed to reactive PDMS-C in Production Example 3-1. Similarly, chip PC
-PDMS copolymer was obtained.

Production Example 3-4 [Production of PC-PDMS Copolymer A ₄ ] In Production Example 3-1, 81 g of p-tert-butylphenol was 113 g.
A chip-like PC-PDMS copolymer was obtained in the same manner as in Production Example 3-1 except that the above was changed to.

Production Example 3-5 [Production of PC-PDMS Copolymer A ₅ ] In Production Example 3-1, 81 g of p-tert-butylphenol was 113 g.
To the reactive PDMS-A.
A chip-like PC-PDMS copolymer was obtained in the same manner as in Production Example 3-1, except that B was changed.

Production Example 3-6 [Production of PC-PDMS Copolymer A ₆ ] In Production Example 3-1, 160 g of reactive PDMS-A was changed to 320 g, and 81 g of p-tert-butylphenol was changed to 113 g.
A chip-like PC-PDMS copolymer was obtained in the same manner as in Production Example 3-1, except that g was changed to g.

PC-PDM obtained in Production Examples 3-1 to 6
Each of the S copolymers A _{1 to} A ₆ was dried at 120 ° C. for one day and then pelletized by an extruder at 280 ° C. Then, for each physical property, the PDMS chain length, PDMS content and viscosity average molecular weight were measured. The results are shown in Table 1.

[0033]

[Table 1]

The PDMS chain length, PDMS content and viscosity average molecular weight were measured as follows. 1: PDMS chain length (n: dimethylsilanooxane unit) The peak of the methyl group of dimethylsiloxane seen at ¹ ppm by ¹ HNMR and PC-P seen at 2.6 ppm.
It was determined from the intensity ratio with the methylene group peak of the DMS bond. 2: PDMS content It was calculated from the intensity ratio of the isopropyl methyl group peak of bisphenol A observed at 1.7 ppm in ¹ H NMR and the dimethylsiloxane methyl group peak observed at 0.2 ppm. 3: Viscosity average molecular weight (Mv) The viscosity of the methylene chloride solution at 20 ° C. was measured with an Ubbelohde type viscosity tube, and the intrinsic viscosity [η] was calculated from this, and then calculated by the following formula. [Η] = 1.23 × 10 ⁻⁵ × Mv ^0.83

Examples 1-10 and Comparative Examples 1-17 PC-PDMS copolymer A obtained in Production Examples 3-1-6
_{1 to} A ₆ and commercially available polycarbonate and glass fiber were mixed in the mixing ratio shown in Table 2, and were kneaded at a temperature of 300 ° C. by a vented twin-screw extruder [manufactured by Toshiba Machine Co., Ltd., TEM-35B]. Pelletized. The glass fiber was supplied from the downstream of the hopper supply position of the raw material resin of the extruder. The obtained pellets were each dried with hot air at 120 ° C. for 5 hours, and then the injection molding machine [Toshiba Machine Co., Ltd., I
S100EN], molding temperature of 300 ° C, 80 ° C
A test piece was produced by injection molding into the mold cavity at the mold temperature of. The quality of the obtained test pieces was evaluated by Izod impact strength, bending strength, tensile strength and surface appearance. Further, the thermal stability was evaluated by injection molding a raw material pellet in an injection molding machine [manufactured by Toshiba Machine Co., Ltd., IS25EP1A] at a cylinder temperature of 3
Color difference (color difference Δ ^* ab) between a molded product that has been molded by allowing it to stay at 20 ° C for 20 minutes and a molded product that has a normal cycle (retention for 40 seconds)
Was measured and evaluated. The results are shown in Table 3.

The commercially available polycarbonates are as follows. B _1: Tarflon A2200 [Idemitsu Petrochemical Co., Ltd., M
v = 21,000] B ₂ : Tufflon A1500 [manufactured by Idemitsu Petrochemical Co., Ltd., M
v = 15,000] Further, the glass fiber is as follows. C ₁ : Asahi Fiber Glass Co., Ltd. MA419 Coupling agent: Aminosilane sizing agent: Bisphenol type epoxy resin Type: Chopped strand (diameter 13 μm, length 3
mm) C ₂ : ECR glass coupling agent manufactured by Asahi Fiber Glass Co., Ltd .: Aminosilane sizing agent: Epoxy resin type: Chopped strand (diameter 23 μm, length 3)
mm) C _3: Asahi Fiber Glass Co., Ltd. FT121 coupling agent: aminosilane sizing agent: polyurethane and bisphenol type epoxy resin type: chopped strands (diameter 13 .mu.m, length 3
mm) C _4: Asahi Fiber Glass Co., Ltd. MA409C coupling agent: aminosilane sizing agent: polyurethane type: chopped strands (diameter 13 .mu.m, length 3 mm) C _5: Asahi Fiber Glass Co., Ltd. TA409C coupling agent: Aminosilane sizing agent: Urethane resin Type: Chopped strand (diameter 23 μm, length 3
mm) C ₆ : FT514 Coupling agent manufactured by Asahi Fiber Glass Co., Ltd .: Aminosilane sizing agent: Polyolefin resin Type: Chopped strands (diameter 13 μm, length 3)
mm)

[0037]

[Table 2]

[0038]

[Table 3]

[0039]

[Table 4]

[0040]

[Table 5]

Each measurement was performed as follows. 1: Izod impact strength It was measured according to JIS-K-7110. 2: Tensile strength Measured according to JIS-K-7203. 3: Bending strength Measured according to JIS-K-7113. 4: Surface appearance The visual evaluation and the tactile evaluation of the molded product were carried out and judged. 5: Color difference (Δ ^* ab) Measured according to JIS-K-7105.

[0042]

As described above, the polycarbonate resin composition of the present invention is excellent in mechanical strength such as bending strength and tensile rupture strength and surface appearance, and is also excellent in impact resistance.
It also has excellent thermal stability. Therefore, the polycarbonate resin composition of the present invention is effectively used as a raw material for various molded products, for example, various molded products widely used in the fields of electric / electronic devices, automobiles and the like.

Claims (2)

[Claims] 1. Glass fibers 5 treated with a sizing agent containing (A) a polycarbonate-polyorganosiloxane copolymer (5 to 95% by weight), (B) a polycarbonate resin (0 to 90% by weight) and (C) an epoxy resin. 60% by weight, and the proportion of the polyorganosiloxane part in the component (A) is 0.5 to 40% by weight based on the total amount of the components (A) and (B). And a polycarbonate resin composition. 2. The polycarbonate resin composition according to claim 1, wherein the component (C) is glass fiber treated with a sizing agent containing an epoxy resin and a urethane resin.