Polycarbonate resin composition and molding of the same

The present invention relates to a polycarbonate resin composition and a molded product thereof. More specifically, the present invention relates to a polycarbonate resin composition which does not exhibit layered peeling after molding, is excellent in impact resistance, bending strength, fluidity, etc., and has high chemical resistance, and a molded product thereof.

Polycarbonate resin is used as an important material for electronic, information, electrical parts, mechanical parts, etc. because it has excellent mechanical strength such as heat resistance and impact resistance, and transparency. However, it also has weaknesses such as low fluidity and poor chemical resistance. Therefore, alloying of polycarbonate with polyolefin has been studied in order to improve fluidity and impart excellent chemical resistance.

Japanese Patent Application Laid-Open No. 63-215749 (Patent Document 1) discloses that a polycarbonate composition having an aliphatic hydroxyl group terminal is produced by copolymerization, and then polypropylene, glycidyl methacrylate-modified polypropylene, or the like is used to obtain a polycarbonate composition. ing. However, such an aliphatic hydroxyl group-terminated polycarbonate has poor thermal stability and causes a cleavage reaction of the carbonate bond of the polycarbonate in the extruder, so that only a material having low elongation and impact strength can be obtained. Further, Japanese Patent Application Laid-Open No. 63-215750 (Patent Document 2) discloses that a polycarbonate having a carboxyl group terminal is prepared by copolymerization and mixed with a polypropylene having an epoxy group to obtain a desired composition. However, in this case as well, since the polycarbonate contains a carboxyl group, it is difficult to produce the polycarbonate, and as in the case of the polycarbonate having a hydroxyl group at the terminal described above, the carbonate bond of the polycarbonate is cleaved in the extruder. It is easy, and the obtained polycarbonate also has a carboxyl group remaining, so that the durability becomes inferior. Therefore, it has not been possible to obtain a polycarbonate resin composition having excellent fluidity and chemical resistance while maintaining the mechanical strength characteristic of the polycarbonate resin.

On the other hand, alloying of polycarbonate with a polycarbonate, a polyolefin-based resin having an epoxy group and / or a polyolefin-based elastomer, and a polyolefin has also been performed (Patent Documents 3 to 5). As a result, a polycarbonate resin that maintains mechanical strength such as heat resistance and impact resistance and is also excellent in fluidity and chemical resistance has been obtained. However, further thinning of the product is required, and when such a thin-walled molded product is obtained, the resin compositions described in Patent Documents 3 to 5 are subject to high shear depending on the vicinity of the gate shape and molding conditions. May peel off, and further improvement of the resin composition is required.

<p><patcit num="1"><text>Japanese Unexamined Patent Publication No. 63-215749</text></patcit><patcit num="2"><text>Japanese Patent Application Laid-Open No. 63-215750</text></patcit><patcit num="3"><text>Japanese Unexamined Patent Publication No. 2009-275131</text></patcit><patcit num="4"><text>Japanese Unexamined Patent Publication No. 2009-298993</text></patcit><patcit num="5"><text>Japanese Unexamined Patent Publication No. 2010-24368</text></patcit></p>

<p> The present invention compensates for the shortcomings of aromatic polycarbonate resin, has excellent impact resistance, bending strength, fluidity, etc., has high chemical resistance, and does not exhibit layered peeling even in a thin-walled molded product after molding. In particular, it is an object of the present invention to provide a polycarbonate resin composition and a molded product thereof so that peeling does not occur in the vicinity of the gate when a thin-walled molded product is molded by a film gate, a pin gate, or the like.</p>

<p> As a result of diligent research to achieve the above object, the present inventors have made a resin component containing an aromatic polycarbonate resin, a polyolefin-based resin and / or a polyolefin-based elastomer containing an epoxy group or a glycidyl group, and a polyolefin-based resin. It was found that the above object was achieved by adding a phosphine compound to a polycarbonate resin composition and melt-kneading it to obtain a polycarbonate resin composition, and completed the present invention.</p><p> That is, the present invention provides the following polycarbonate resin composition and a molded product thereof. 1. (A) 50 to 94% by mass of aromatic polycarbonate resin, (B) 1 to 30% by mass of polyolefin-based resin and / or polyolefin-based elastomer containing an epoxy group or glycidyl group, and (C) polyolefin-based resin [ingredients] (Excluding the polyolefin resin of (B)] A polycarbonate resin composition containing 0.005 to 0.3 parts by mass of the (D) phosphine compound and melt-kneading with respect to 100 parts by mass of the resin component consisting of 3 to 40% by mass. 2. Selected from the group of (E) aliphatic amine salt, aromatic amine salt, ammonium hydroxide, hydroxylamine salt, and quaternary phosphonium salt with respect to 100 parts by mass of the resin component consisting of (A) to (C). The polycarbonate resin composition according to 1 above, which comprises 0.0001 to 1 part by mass of at least one kind. 3. (A) The polycarbonate resin composition according to 1 or 2 above, wherein the aromatic polycarbonate resin has a viscosity average molecular weight of 16000 to 35000. Four. (B) The polycarbonate resin composition according to any one of 1 to 3 above, wherein the content of the epoxy group or glycidyl group in the polyolefin resin and / or the polyolefin elastomer containing an epoxy group or glycidyl group is 1 to 20% by mass. Stuff. 5. The polycarbonate resin composition according to any one of 1 to 4 above, wherein the (C) polyolefin resin [excluding the polyolefin resin of the component (B)] has a melt index (MI) of 0.01 to 60 g / 10 minutes. 6. Any of the above 1 to 5 characterized by containing 3 to 40 parts by mass of the (F) phosphorus-based and / or halogen-based flame retardant with respect to 100 parts by mass of the resin component composed of (A) to (C). The polycarbonate resin composition described in Crab. 7. The polycarbonate resin according to any one of 1 to 6 above, which contains 0.05 to 5 parts by mass of the (G) fluorine-containing polymer with respect to 100 parts by mass of the resin component consisting of (A) to (C). Composition. 8. The polycarbonate resin according to any one of 1 to 7 above, which contains 0.01 to 1 part by mass of the (H) antioxidant with respect to 100 parts by mass of the resin component consisting of (A) to (C). Composition. 9. A molded product obtained by injection molding the polycarbonate resin composition according to any one of 1 to 8 above.</p>

<p> According to the present invention, by adding a phosphine compound, the compatibility between the polycarbonate resin and the polyolefin-based resin is enhanced, the peel strength is improved even in a thin-walled molded product, and the fluidity, impact resistance and bending strength are excellent. , A polycarbonate resin composition having high chemical resistance can be provided, and by using this, a molded product that does not exhibit layered peeling after molding can be provided.</p>

The polycarbonate resin composition of the present invention comprises (A) an aromatic polycarbonate resin, (B) a polyolefin resin containing an epoxy group or a glycidyl group and / or a polyolefin-based elastomer, and (C) a polyolefin-based resin [component (B). Polyolefin-based resin is excluded], and (D) a polycarbonate resin composition containing a phosphine compound. Hereinafter, each component used in the polycarbonate resin composition of the present invention will be described.

[(A) Aromatic Polycarbonate Resin] As the aromatic polycarbonate resin which is the component (A) in the present invention, various aromatic polycarbonates produced by the reaction of divalent phenol and the carbonate precursor can be used.

Various divalent phenols can be mentioned, but in particular, 2,2-bis (4-hydroxyphenyl) propane [bisphenol A], bis (4-hydroxyphenyl) methane, and 1,1-bis (4-hydroxyphenyl) methane. Hydroxyphenyl) ethane, 2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane, 4,4'-dihydroxydiphenyl, bis (4-hydroxyphenyl) cycloalkane, bis (4-hydroxyphenyl) ether , Bis (4-hydroxyphenyl) sulfide, bis (4-hydroxyphenyl) sulfone, bis (4-hydroxyphenyl) sulfoxide and bis (4-hydroxyphenyl) ketone and the like. These divalent phenols may be used alone or in combination of two or more. In particular, preferred divalent phenols are bis (hydroxyphenyl) alkanes, particularly bisphenol A or bisphenol A as the main raw material.

Examples of the carbonate precursor include carbonyl halide, carbonyl ester and haloformate, and specific examples thereof include phosgene, dihalohomet of divalent phenol, diphenyl carbonate, dimethyl carbonate and diethyl carbonate.

In addition, the aromatic polycarbonate may have a branched structure, and examples of the branched agent include 1,1,1-tris (4-hydroxyphenyl) ethane, α, α', α -tris (4-tris). Bidroxyphenyl) -1,3,5-triisopropylbenzene, fluoroglycine, trimellitic acid and isatinbis (o-cresol) can be mentioned.

The aromatic polycarbonate resin of the component (A) in the present invention preferably has a viscosity average molecular weight of 16000 to 35000, more preferably 17000 to 32000, and further preferably 18000 to 30000. If the viscosity average molecular weight is less than 16000, the impact strength and tensile strength are insufficient, and the solvent resistance tends to be deteriorated. If the viscosity average molecular weight is more than 35,000, the moldability is deteriorated and it becomes difficult to mold a thin part. Layer peeling of the molded product may occur and the tensile elongation may decrease.

The viscosity average molecular weight of component (A) in the present invention is 100 cm methylene chloride.³Specific viscosity (η) measured using a Ubbelohde viscous meter in a solution prepared by dissolving about 0.7 g of aromatic polycarbonate resin at 20 ° C._sp) Is inserted into the following equation. (η_sp) / C = [η] +0.45 × [η]²C [η] = 1.23 × 10^-5M^0.83 (However, [η] is the ultimate viscosity and C is the polymer concentration.)

The blending amount of the component (A) in the present invention is 50 to 94% by mass based on the total amount of the components (A) to (C). If it is less than 50% by mass, the tensile strength and elastic modulus will decrease, and if it exceeds 94% by mass, the improvement effects such as fluidity and chemical resistance may be insufficient. The blending amount is preferably 65 to 92% by mass, and more preferably 70 to 90% by mass.

The aromatic polycarbonate resin of the component (A) used here includes those having a hydroxyl group as the terminal group of the molecular chain, and depending on the amount of the terminal hydroxyl group, the aliphatic amines which are the components (E) described later, It can be determined whether or not aromatic amines, ammonium hydroxides, hydroxylamine salts, quaternary phosphonium salts, etc. are blended.

That is, when the content of the terminal hydroxyl group with respect to all the terminal groups of the aromatic polycarbonate resin is 10 to 80 mol%, it is not necessary to add an amine salt or the like, but the content of the terminal hydroxyl group of the aromatic polycarbonate resin is contained. When the amount is less than 30 mol%, it is preferable to add at least one compound obtained from the group of aliphatic amines, aromatic amines, ammonium hydroxides, hydroxylamine salts and quaternary phosphonium salts. Of course, even if the content of the terminal hydroxyl group is 10 mol% or more, an amine salt or the like may be blended, and conversely, even if the content of the terminal hydroxyl group is less than 30 mol%, the amine may be blended. There is no problem even if salt is not added.

The amount of terminal hydroxyl groups (OH terminal fraction) with respect to all terminal groups of the polycarbonate resin is¹It can be determined from the integral value of the peak derived from the terminal hydroxyl group by measuring H-NMR.

[(B) Polyolefin-based resin and / or polyolefin-based elastomer containing an epoxy group or glycidyl group] The polyolefin-based resin in the component (B) is, for example, a homopolymer of an olefin having an epoxy group or a glycidyl group, a copolymer of an olefin and an unsaturated monomer having an epoxy group or a glycidyl group, and an olefin polymer. It may be a copolymer of an unsaturated monomer having an epoxy group or a glycidyl group, and such a copolymer may be a graft copolymer, a random copolymer, or a block copolymer. Good.

Further, for example, an unsaturated bond existing at the terminal of an olefin polymer, a copolymer of an olefin and another unsaturated monomer, or a composite thereof is formed by, for example, hydrogen peroxide or an organic peracid. An epoxy group may be introduced by oxidizing with benzoic acid, performic acid, peracetic acid or the like. That is, any of the olefin-based polymers in which an epoxy group or a glycidyl group is introduced may be used.

The polyolefin-based elastomer in the component (B) contains an epoxy group or a glycidyl group, and has a low crystallinity or amorphous olefin-based copolymer having a crystallinity of 50% or less as measured by an X-ray diffraction method. It is a coalescence.

As olefins, ethylene, propylene, 1-butene, isobutylene, 2-butene, cyclobutene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 3-methyl-1-butene, 4-methyl-1- Butene, cyclopentene, 1-hexene, cyclohexene, 1-octene, 1-decene, 1-dodecene and the like can be mentioned. These may be used alone or in combination of two or more.

Examples of unsaturated monomers having an epoxy group or a glycidyl group include glycidyl acrylate, glycidyl methacrylate, vinyl glycidyl ether, allyl glycidyl ether, methacryl glycidyl ether, 2-methylpropenyl glycidyl ether, styrene-p-glycidyl ether, and glycidyl cinna. Examples include mate, glycidyl ester of itaconic acid, and N- [4- (2,3-epoxypropoxy) -3,5-dimethylbenzyl] methacrylicamide. These may be used alone or in combination of two or more, and together with these unsaturated monomers having an epoxy group or a glycidyl group, such as alkyl acrylates and alkyl methacrylates. It contains a group such as acrylic acid ester or methacrylic acid ester in addition to the glycidyl group, which is obtained by copolymerizing these with an unsaturated monomer having no epoxy group or glycidyl group. May be good.

The epoxy group or glycidyl group contained in the polyolefin-based resin and / or the polyolefin-based elastomer which is the component (B) in the present invention is preferably contained in an amount of 1 to 20% by mass. If the content is less than 1% by mass, the effect of improving the compatibility between the component (A) and the component (C) is not exhibited, the tensile elongation and impact resistance are lowered, and the layer of the molded product is peeled off. I have something to do. Further, if it exceeds 20% by mass, self-crosslinking may occur, the tensile elongation and impact resistance may decrease, and layer peeling of the molded product may occur. From this point of view, the content of the epoxy group or the glycidyl group is more preferably 2 to 18% by mass, further preferably 4 to 15% by mass.

The weight average molecular weight of the component (B) is preferably about 50,000 to 500,000. Within this range, layer peeling can be prevented, and good tensile elongation and high impact resistance can be obtained. The weight average molecular weight can be determined by using a gel permeation chromatography (GPC) method.

In the present invention, as the component (B), one or more polyolefin-based resins having an epoxy group or glycidyl group may be used, or one or more polyolefin-based elastomers having an epoxy group or glycidyl group may be used. Further, one or more of the above-mentioned polyolefin-based resins and one or more kinds of polyolefin-based elastomers may be used in combination.

The blending amount of the component (B) in the present invention is 1 to 30% by mass based on the total amount of the components (A) to (C). If it is less than 1% by mass, it cannot be said that the compatibility between the component (A) and the component (C) is sufficiently improved, the tensile elongation and impact resistance are lowered, and the layer of the molded product may be peeled off. .. If it exceeds 30% by mass, self-crosslinking is likely to occur, tensile strength and impact resistance are lowered, elastic modulus is also lowered, and layer peeling of the molded product may occur in some cases. From this point of view, the blending amount is more preferably 2 to 20% by mass, and further preferably 3 to 10% by mass.

[(C) Polyolefin resin] The polyolefin-based resin which is the component (C) in the present invention is a polyolefin-based resin other than the polyolefin-based resin having the epoxy group or the glycidyl group of the component (B), and the polyolefin-based resin includes the above-mentioned ethylene and propylene. Examples thereof include those obtained by independently polymerizing olefins such as butene and polymers obtained by copolymerizing them.

For example, the polyethylene-based resin may be one obtained by polymerizing ethylene alone or copolymerized mainly by ethylene, and may be high-density polyethylene, medium-density polyethylene, low-density polyethylene, or linear resin. Examples thereof include polyethylene-based resins such as low-density polyethylene, ethylene-α-olefin copolymer, ethylene-ethylacrylate copolymer, and ethylene-methacrylate copolymer. Examples of the ethylene-α-olefin copolymer include a copolymer of propylene and ethylene, and may be any of a graft copolymer, a random copolymer, and a block copolymer. Among these, high-density polyethylene is particularly preferable from the viewpoint of chemical resistance.

The melt index (MI) of these polyethylene-based resins is preferably about 0.01 to 50 g / 10 minutes, more preferably 0.02 to 30 g / 10 minutes. If the MI is less than 0.01 g / 10 minutes, the desired effect of improving the fluidity becomes small, and if it exceeds 50 g / 10 minutes, layer peeling of the injection molded product tends to occur easily. The MI in the case of polyethylene-based resin was determined by a measurement method based on ASTM D 1238, and was measured at a resin temperature of 190 ° C and a load of 21.18 N.

Further, the propylene-based resin may be one obtained by polymerizing propylene alone or may be one obtained by copolymerizing mainly propylene. For example, it may be an isotactic propylene homopolymer or a syndiotactic propylene homopolymer. Further, the copolymer includes, for example, a copolymer of propylene and ethylene, and may be any of a graft copolymer, a random copolymer, and a block copolymer.

The melt index (MI) of such a propylene-based resin is preferably about 0.1 to 60 g / 10 minutes, and more preferably 0.1 to 50 g / 10 minutes. If the MI is 0.1 g / 10 minutes or more, the effect of improving the fluidity can be sufficiently exerted, and if the MI is 60 g / 10 minutes or less, the layer peeling of the molded product is less likely to occur. The MI of this propylene resin was determined by a measurement method based on ASTM D 1238, and was measured at a resin temperature of 230 ° C and a load of 21.18 N.

In addition to the above polyethylene-based resin or polypropylene-based resin, any polyolefin-based resin having a melt index (MI) of about 0.01 to 60/10 minutes (230 ° C, 21.18N) can be used in the same manner. ..

In the present invention, as the component (C), one kind of the above-mentioned polyolefin resin may be used, or two or more kinds may be used in combination. The blending amount of the component (C) in the present invention is 3 to 40% by mass, more preferably 5 to 35% by mass, and 7 to 30% by mass in the total amount of the components (A) to (C). Is more preferable. If it is less than 3% by mass, the effect of improving fluidity and chemical resistance cannot be sufficiently exhibited, and if it exceeds 40% by mass, the tensile elongation, elastic modulus, and impact resistance decrease, and in some cases, layer peeling of the molded product occurs. It tends to be easier.

[(D) Phosphine compound] The phosphine compound used as the component (D) of the present invention enhances the reactivity of the polyolefin-based resin and / or the polyolefin-based elastomer containing the epoxy group or the glycidyl group of the component (B), and increases the amount produced as a so-called compatibilizer. By increasing the amount, the compatibility of the resins of the components (A) to (C) is enhanced, and the mechanical strength and the peeling strength are improved. Organic phosphine compounds are preferable, and heat stability is particularly preferable. Aromatic phosphine compounds are preferably used because they have excellent properties and are difficult to decompose.

Examples of such aromatic phosphine compounds include triphenylphosphine, tri-p-tolylphosphine, tris (4-methoxyphenyl) phosphine, tri-2,5-kisilylphosphine, and tri-m-tolylphosphine. , Tris (p-tert-butoxyphenyl) phosphine, tris (2,6-dimethoxyphenyl) phosphine, diphenylcyclohexylphosphine, diphenylpropylphosphine, ethyldiphenylphosphine, isopropyldiphenylphosphine, methyldiphenylphosphine and other aryl groups Although those are exemplified, among them, triarylphosphine is preferable in that it enhances compatibility, and such a phosphine compound may be used alone or in combination of two or more.

The blending amount of the component (D) in the present invention is 0.005 to 0.3 parts by mass, preferably 0.01 to 0.2 parts by mass, based on 100 parts by mass of the total amount of the components (A) to (C). If it is less than 0.005 parts by mass, the improvement of the peel strength is insufficient, and if it exceeds 0.3 parts by mass, and if it is too much, the strength and chemical resistance are lowered.

In addition to the above components (A) to (D), the polycarbonate resin composition of the present invention also contains (E) an aliphatic amine salt, an aromatic amine salt, an ammonium hydroxide, and a hydroxylamine salt, if necessary. , At least one selected from the group of quaternary phosphonium salts, (F) phosphorus-based and / or halogen-based flame retardants and (G) fluorine-containing polymers for improving flame retardancy, or durability and peeling resistance. To improve, (H) phosphorus-based antioxidants can be added.

[(E) Aliphatic amine salts, aromatic amine salts, ammonium hydroxides, hydroxylamine salts, and quaternary phosphonium salts] The component (E) in the present invention is at least one selected from the group of aliphatic amine salts, aromatic amine salts, ammonium hydroxides, hydroxylamine salts, and quaternary phosphonium salts. Aliphatic amine salts and aromatic amine salts are, for example, the general formula R.¹R²R³N 1 / nA¹Can be represented by R when it is an aliphatic amine salt¹~ R³Independently indicate a hydrogen atom or an aliphatic group (although not all are hydrogen atoms at the same time). R for aromatic amine salts¹~ R³Independently indicate a hydrogen atom or an aromatic group (although not all are hydrogen atoms at the same time). A¹Represents an acid, such as hydrochloric acid, sulfuric acid, nitric acid, chloric acid, perchloric acid, acetic acid, monoalkylsulfuric acid, sulfonic acid compounds and the like. n is acid A¹It is the valence of the anion of, for example, n = 1 in the case of hydrochloric acid and n = 2 in the case of sulfuric acid.

Ammonium hydroxide is used, for example, in the general formula R.⁴R⁵R⁶R⁷N⁺ OH^-Can be represented by. R⁴~ R⁷Indicates, for example, a hydrogen atom independently or a linear or branched alkyl group having 1 to 5 carbon atoms (however, not all are hydrogen atoms at the same time).

Specific examples of this ammonium hydroxide include tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetra-n-propylammonium hydroxide, tetraisopropylammonium hydroxide and the like.

On the other hand, as the hydroxylamine salt, for example, the general formula R⁸R⁹NOH 1 / mA²Can be represented by R⁸And R⁹Indicates, for example, a hydrogen atom independently or a linear or branched alkyl group having 1 to 5 carbon atoms (however, not all are hydrogen atoms at the same time). A²Indicates acid, m is acid A²The valence of the anion.

Examples of this hydroxylamine salt include methylhydroxylamine hydrochloride, ethylhydroxylamine hydrochloride, n-propylhydroxylamine hydrochloride, isopropylhydroxylamine hydrochloride, dimethylhydroxylamine hydrochloride, diethylhydroxylamine hydrochloride, and hydrochloric acid in these hydroxylamines. Examples thereof include hydroxylamines substituted with other acids such as sulfuric acid, nitric acid, acetic acid, monoalkyl sulfuric acid, and sulfonic acid compounds.

The quaternary phosphonium salt is not particularly limited, but for example, a compound represented by any of the following general formulas (I) to (III) can be used. (PR₄)⁺ (X²)^- (I) (PR₄)⁺₂ (Y²)^2- (II) [(PR₄)⁺O^-〕_n-P (= O) R _3-n (III) In the above general formulas (I) to (III), R represents an organic group, for example, an alkyl group such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, an octyl group or a cyclohexyl group, or a cycloalkyl group. It indicates an aryl group such as a group, a phenyl group, a trill group, a xsilyl group, a naphthyl group and a biphenyl group, an arylalkyl group such as a benzyl group and the like. At least one of the four Rs attached to the phosphorus atom must be an aryl group. Further, the four Rs may be the same or different from each other, and the two Rs may be combined to form a ring structure.

In the above general formula (I), X²Is a halogen atom, a hydroxyl group, an alkyloxy group, an aryloxy group, an alkylcarbonyloxy group, an arylcarbonyloxy group, HCO₃Or BR'₄Indicates a monovalent counter anion such as. Here, R'represents a hydrogen atom or a hydrocarbon group such as an alkyl group or an aryl group, and the four R's may be the same or different from each other. In the above general formula (II), Y²Is CO₃Indicates a divalent counter anion such as (including the case of two monovalent counter anions). In the above general formula (III), R "represents a hydrocarbon group, an alkyloxy group, an aryloxy group or a hydroxyl group, R" may be the same or different from each other, and n represents an integer of 1 to 3.

Specific examples of the quaternary phosphonium compound represented by the above general formula (I) include tetraphenylphosphonium hydroxide, biphenyltriphenylphosphonium hydroxide, methoxyphenyltriphenylphosphonium hydroxide, and phenoxyphenyltriphenylphosphonium hydroxide. , Naftylphenyltriphenylphosphonium hydroxide, tetraphenylphosphonium tetraphenylborate, biphenyltriphenylphosphonium tetraphenylborate, methoxyphenyltriphenylphosphonium tetraphenylborate, phenoxyphenyltriphenylphosphonium tetraphenylborate, naphthylphenyltriphenylphosphonium tetraphenylborate , Tetraphenylphosphonium phenoxide, biphenyltriphenylphosphonium phenoxide, methoxyphenyltriphenylphosphonium phenoxide, phenoxyphenyltriphenylphosphonium phenoxide, naphthylphenyltriphenylphosphonium phenoxide, tetraphenylphosphonium chloride, biphenyltriphenylphosphonium chloride, methoxyphenyltriphenylphosphonium chloride , Phenoxyphenyltriphenylphosphonium chloride or naphthylphenyltriphenylphosphonium chloride, cyclohexyltriphenylphosphonium tetraphenylborate and the like.

Specific examples of the quaternary phosphonium compound having a divalent counter anion as represented by the above general formula (II) include, for example, bis (tetraphenylphosphonium) carbonate, bis (biphenyltriphenylphosphonium) carbonate, and bis (naphthyl). Tertiary phosphonium salts such as triphenylphosphonium carbonate, and further, for example, bis-tetraphenylphosphonium salt of 2,2-bis (4-hydroxyphenyl) propane, ethylenebis (triphenylphosphonium) dibromid, trimethylenebis (trimethylenebis). Phenylphosphonium) -bis (tetraphenylborate) and the like can also be mentioned.

Specific examples of the quaternary phosphonium compound having a phosphate as represented by the above general formula (III) include tetraphenylphosphonium phosphate, tetraphenylphosphonium phenylphosphate, tetraphenylphosphonium diphenylphosphate and the like. Can be mentioned.

From the viewpoint of improving compatibility between polycarbonate and polyolefin and improving exfoliation, among these quaternary phosphonium salts, one or more aryl groups represented by the above general formula (I) and bonded to a phosphorus atom are present. Those having, more preferably, those having three or more are more preferable. The quaternary phosphonium salt may be used alone or in combination of two or more.

In the present invention, as described above, the component (E) depends on the ratio of the terminal hydroxyl group to the total terminal functional group of the aromatic polycarbonate resin of the component (A), that is, the terminal hydroxyl group to the terminal group. When the group content is less than 30 mol%, it is particularly preferable to add the group, and by adding the group, the mechanical strength, the peel strength and the like can be further improved. When blended, the blending amount of the component (E) is 0.0001 to 1 part by mass with respect to 100 parts by mass of the total amount of the components (A) to (C). If it is blended in excess of 1 part by mass, the molecular weight of the polycarbonate in the polycarbonate resin composition may decrease, the chemical resistance may decrease, and the tensile elongation and impact strength may decrease. From this point of view, the blending amount is more preferably 0.0005 to 0.5 parts by mass, and further preferably 0.001 to 0.4 parts by mass.

When the component (E) is blended, two or more kinds of the aliphatic amine salt, the aromatic amine salt, the ammonium hydroxide, the hydroxylamine salt, and the quaternary phosphonium of the component (E) may be used in combination, but in particular. From the viewpoint of improving compatibility and improving peeling, it is preferable to use a quaternary ammonium salt such as tetraalkylammonium hydroxide in combination with a quaternary phosphonium salt, and when used in combination, amines are used. It is preferable that the blending amount of the above is 0.1 to 50 times the blending amount of the quaternary phosphonium salt in terms of controlling the molecular weight of the finished polycarbonate and exhibiting chemical resistance and mechanical properties.

[(F) Phosphorus and / or Halogen Flame Retardants] The component (F) is a so-called flame retardant, and the flame retardants used include phosphorus-based flame retardants and halogen-based flame retardants. Among these, phosphorus-based flame retardants include red phosphorus and phosphoric acid ester-based flame retardants, and phosphoric acid ester-based flame retardants consist of phosphoric acid ester monomers, oligomers, polymers, or mixtures thereof. There are, specifically, trimethyl phosphate, triethyl phosphate, tributyl phosphate, trioctyl phosphate, tributoxyethyl phosphate, triphenyl phosphate, tricresyl phosphate, cresyldiphenyl phosphate, octyldiphenyl phosphate, tri (2-ethylhexyl). ) Phosphate, diisopropylphenyl phosphate, trixylenyl phosphate, tris (isopropylphenyl) phosphate, trinaphthyl phosphate, bisphenol A bisphosphate, hydroquinone bisphosphate, resorcin bisphosphate, resorcinol-diphenyl phosphate, trioxybenzene triphosphate, etc. Substitutes, condensates and the like can be mentioned.

Examples of commercially available phosphoric acid ester compounds that can be suitably used as phosphoric acid ester-based flame retardants include TPP [triphenyl phosphate], TXP [tricylenyl phosphate], and CR733S [manufactured by Daihachi Chemical Industry Co., Ltd. Resolsinol bis (diphenyl phosphate)], CR741 [bisphenol A bis (diphenyl phosphate)], PX200 [1,3-phenylene-tetrakis (2,6-dimethylphenyl) phosphate, PX201L [1,4-phenylene-tetrakis (2,, 6-Dimethylphenyl) phosphate, PX202 [4,4'-biphenylene-teslakis) 2,6-dimethylphenyl) phosphate and the like can be mentioned. The above-mentioned phosphoric acid ester flame retardant is obtained by reacting divalent phenols and monovalent phenols represented by Ar · OH with phosphorus oxychloride.

As the halogen-based flame retardant which is another component (F), tetrabromobisphenol A (TBA), ethylenebis (pentabromophenyl), ethylenebistetrabromophthalimide, dibromomethyl-dibromoscrohexane, tetrabromocyclooctane, etc. Hexabromocyclododecane, decabromodiphenyl oxide, tetradecabromodiphenyloxybenzene, (co) polymers of halogenated polycarbonate and halogenated polycarbonate, these oligomers (TBA carbonate oligomers), decabromodiphenyl ethers, TBA epoxy oligomers, halogenated Halogenated, halogen-containing acrylic resin [Halogenated polybenzyl (meth) acrylate-based resin, for example, brominated polybenzyl (meth) acrylate such as poly (pentabromobenzyl (meth) acrylate), poly (pentachlorobenzyl (meth) acrylate)) Halogenated benzyl (meth) acrylate alone or copolymer, etc.], Halogen-containing styrene resin [Halogenated polystyrene (halogenated polystyrene, chlorinated polystyrene, etc.) styrene resin, halogenated Styrene-based monomer alone or copolymer, etc.)], halogen-containing polycarbonate-based resin [bromineed polycarbonate, chlorinated polycarbonate, etc., halogenated polycarbonate, etc.], halogen-containing epoxy compound [bromine-containing epoxy resin (bromineed epoxy resin, etc.) Halogenated epoxy resin such as chlorinated epoxy resin [Halogenated epoxy resin etc.];Halogen-containing phenoxy resins (such as halogenated phenoxy resins) such as bromine-containing phenoxy resins [such as brominated phenoxy resins], halogen-containing phosphate esters [eg, tris (bromoethyl) phosphate, tris (mono or dibromopropyl) phosphate, etc. Tris (mono or dibromobutyl) phosphate, tris (mono to tribromoneopentyl) phosphate, bis (tribromoneopentyl) phenyl phosphate, bromine-containing phosphates such as tris (mono to tribromophenyl) phosphate, etc.], halogen Containing triazine compounds (eg, bromine-containing triazine compounds such as tris (tribromophenoxy) triazine), halogen-containing isocyanuric acid compounds [eg, tris (2,3-dibromopropyl) isocyanurate, tris (2,3,4-) Bromine-containing isocyanuric acid compounds such as tribromobutyl) isocyanurate, tris (pentabromobenzyl) isocyanurate], halogenated polyaryl ether compounds [eg, octa to decabromodiphenyl ether, octa to decachlorodiphenyl ether and other bis (halogen) Aryl) ethers (eg, bis (phenyl halide) ethers); halogen-containing polyphenylene oxide-based resins such as brominated polyphenylene ethers], halogenated aromatic imide compounds [eg, brominated ethylene bisbrominated phthalimides, etc.] Aromatic imide compounds (eg, bisimide compounds, etc.)], Bisaryl halides [eg, bis, such as diphenyl brominated (C, halogenated)Bromine-containing isocyanuric acid compounds such as 4-tribromobutyl) isocyanurate and tris (pentabromobenzyl) isocyanurate], polyaryl ether compounds halides [eg, bis such as octa-decabromodiphenyl ether and octa-decachlorodiphenyl ether] (Aryl halide ethers (eg, bis (phenyl halide) ethers, etc.); Halogen-containing polyphenylene oxide-based resins, such as brominated polyphenylene ethers], halogenated aromatic imide compounds [eg, ethylenebis brominated phthalimide, etc. Brominated aromatic imide compounds (eg, bisimide compounds, etc.)], bisaryl halogenated compounds [eg, bis (eg, diphenyl halide), etc.Bromine-containing isocyanuric acid compounds such as 4-tribromobutyl) isocyanurate and tris (pentabromobenzyl) isocyanurate], polyaryl ether compounds halides [eg, bis such as octa-decabromodiphenyl ether and octa-decachlorodiphenyl ether] (Aryl halide ethers (eg, bis (phenyl halide) ethers, etc.); Halogen-containing polyphenylene oxide-based resins, such as brominated polyphenylene ethers], halogenated aromatic imide compounds [eg, ethylenebis brominated phthalimide, etc. Brominated aromatic imide compounds (eg, bisimide compounds, etc.)], bisaryl halogenated compounds [eg, bis (eg, diphenyl halide), etc._6-10Aryl); bis (halogenated C) such as brominated diphenylmethane_6-10Aryl) C_1-4Alcan; Halogenated bisphenols such as brominated bisphenol A or derivatives thereof (such as brominated polyester obtained by polymerizing an ethylene oxide adduct of halogenated bisphenols), etc.], Halogenated alicyclic hydrocarbons [crosslinked cyclic saturated or unsaturated Halogenated alicyclic hydrocarbons, such as polycycloalkadiene halides such as dodecachloropentacyclooctadeca-7,15-diene] and the like.

The phosphorus-based and / or halogen-based flame retardants of these components (F) can be used alone or in combination of two or more, and the contents of these components (F) are the above-mentioned (A) to (). It is 3 to 40 parts by mass, preferably 5 to 25 parts by mass, and particularly preferably 6 to 20 parts by mass with respect to 100 parts by mass of the component composed of C). The desired flame retardancy can be obtained by blending 3 parts by mass or more, and deterioration of chemical resistance, heat resistance, tensile elongation, impact strength, etc. can be avoided by blending 40 parts by mass or less. However, by adding the flame retardant, the peeling resistance described later is lowered as compared with the case where the flame retardant is not added, and the flame retardant is required due to the balance between the flame retardancy and the mechanical properties required for the molded product. Needless to say, it is necessary to determine the blending amount of.

[(G) Fluorine-containing polymer] The fluorine-containing polymer as the component (G) is usually a polymer or copolymer containing a fluoroethylene structure, and is, for example, a difluoroethylene polymer, a tetrafluoroethylene polymer, or a tetrafluoroethylene-hexafluoropropylene copolymer. , A polymer of tetrafluoroethylene and an ethylene-based monomer containing no fluorine. It is preferably polytetrafluoroethylene (PTFE), and the number average molecular weight determined from the standard specific gravity is preferably 500,000 or more, and particularly preferably 500,000 to 10,000,000.

As the polytetrafluoroethylene that can be used in the present invention, all kinds currently known can be used. Of the polytetrafluoroethylene, those having the ability to form fibrils are preferable. Polytetrafluoroethylene (PTFE) having a fibril forming ability is not particularly limited, and examples thereof include those classified into type 3 in the ASTM standard. Specific examples thereof include Teflon 6-J [Mitsui / DuPont Fluorochemical Co., Ltd.], Polyflon D-1, Polyflon F-103, Polyflon F201 [Daikin Industries, Ltd.] and CD076 [Asahi Glass Co., Ltd.]. ) Made] and so on.

In addition to those classified into the above type 3, for example, Argoflon F5 (manufactured by Montefluos Co., Ltd.), Polyflon MPA and Polyflon FA-100 (manufactured by Daikin Industries, Ltd.) can be mentioned.

These polytetrafluoroethylene (PTFE) may be used alone or in combination of two or more.

The fluorine-containing polymer of the component (G) is added for further improvement of flame retardancy (for example, V-0, 5V), and the blending amount thereof is that of the components (A) to (C). The total amount is 0.05 to 5 parts by mass per 100 parts by mass. If the blending amount is less than 0.05 parts by mass, the drip-preventing property is inferior, and if it exceeds 5 parts by mass, the surface appearance and mechanical properties (impact strength) deteriorate. More preferably, it is in the range of 0.1 to 1 part by mass.

[(H) Antioxidant] The antioxidant which is the component (H) in the present invention preferably contains phosphorus, and examples of the phosphorus-containing antioxidant include phosphorous acid, phosphoric acid, phosphonic acid, phosphonic acid and esters thereof. For example, a phosphite-based antioxidant, a phosphonite-based antioxidant, and the like can be mentioned.

Specific examples of the phosphite-based antioxidant include triphenylphosphite, trisnonylphenylphosphite, tris (2,4-di-tert-butylphenyl) phosphite, tridecylphosphite, and trioctylphosphite. Trioctadecylphosphite, didecylmonophenylphosphite, dioctylmonophenylphosphite, diisopropylmonophenylphosphite, monobutyldiphenylphosphite, monodecyldiphenylphosphite, monooctyldiphenylphosphite, distearylpentaerythritol diphosphite, Bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, 2,2-methylenebis (4,6-di-tert-butylphenyl) octylphosphite, bis (nonylphenyl) penta Examples thereof include phosphite compounds such as erythritol diphosphite and bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite.

Specific examples of the phosphonite-based antioxidant include tetrakis (2,4-di-tert-butylphenyl) -4,4'-biphenylenediphosphonite and tetrakis (2,4-di-tert-butylphenyl). -4,3'-biphenylenediphosphonite, tetrakis (2,4-di-tert-butylphenyl) -3,3'-biphenylenediphosphonite, bis (2,4-di-tert-butylphenyl) -4 -Biphenylene phosphonite and the like.

Of these, distearyl pentaerythritol diphosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, monooctyldiphenylphosphite, and tridecylphosphite are preferred.

In addition, as other phosphate esters, tributyl phosphate, trimethyl phosphate, tricresyl phosphate, triphenyl phosphate, trichlorophenyl phosphate, triethyl phosphate, diphenyl cresyl phosphate, diphenyl monoorthoxenyl phosphate, tributoxyethyl phosphate, dibutyl phosphate, etc. Examples thereof include dioctyl phosphate and diisopropyl phosphate.

These phosphorus-containing antioxidants of the component (H) are added to further improve durability and peel resistance, and the blending amount thereof is the total amount of the components (A) to (C). On the other hand, it is in the range of 0.01 to 1 part by mass.

[Additive] Further, in the polycarbonate resin composition of the present invention, in addition to the above components (A) to (H), various additives can be blended within a range that does not impair the object of the present invention. Examples of the additive include an ultraviolet absorber, a light stabilizer, a flame retardant aid, a colorant, an antistatic agent, an antiblocking agent, a mold release agent and a lubricant.

[Polycarbonate resin composition and molded article] The polycarbonate resin composition of the present invention is prepared by blending the above components (A) to (D), components (E) to (H) used as necessary, and various additives by a conventional method, and melt-kneading them. Obtainable. More preferably, (A) aromatic polycarbonate resin, (E) amine salt of the component, (B) epoxy group or glycidyl group-containing polyolefin or polyolefin elastomer, (D) phosphine, (G) fluorine-containing polymer are used in the extruder. (C) Polyolefin, (F) Flame Retardant, and (H) Phosphorus Antioxidant are added and mixed on the downstream side of the vent port. Examples of the melt-kneader for melt-kneading include a Banbury mixer, a single-screw extruder, a twin-screw extruder, a conider, and a multi-screw screw extruder. The heating temperature in melt-kneading is usually 220 to 300 ° C, particularly about 250 ° C.

When melt-kneaded under the above conditions, the epoxy group or glycidyl group of the (B) component-containing polyolefin or polyolefin elastomer is activated by the phosphine of the (D) component to promote the formation of a compatible component. Thereby, in the polycarbonate resin composition obtained in the present invention, the aromatic polycarbonate resin of the component (A) is present in the matrix phase, and the polyolefin resin of the component (C) is present in the domain, and the polycarbonate and the epoxy group or the epoxy group are present at the interface thereof. There is a compatibilizing component due to the reaction product with the polyolefin containing the glycidyl group. Interposition of an appropriate amount of compatible components stabilizes the interface, improves the compatibility between polycarbonate and polyolefin, and has excellent mechanical properties such as impact resistance and bending strength, fluidity and chemical resistance, and is difficult to peel off. A resin composition can be obtained.

The polycarbonate resin composition of the present invention is molded by applying known molding methods such as hollow molding, injection molding, extrusion molding, vacuum molding, pneumatic molding, thermal bending molding, compression molding, calendar molding and rotary molding. It can be a body, and a molding method by injection molding is particularly preferable. Further, since the polycarbonate resin composition of the present invention is excellent in impact resistance, bending strength, fluidity and chemical resistance, it can be used as a housing for automobile parts, electronic devices and information devices in which these characteristics are required by injection molding. It is available.

The present invention will be described in more detail with reference to Examples, but the present invention is not limited thereto. In the following, GMA indicates glycidyl methacrylate and MI indicates melt index.

<p> The components (A) to (F) used in Examples and Comparative Examples are shown below. (A) Aromatic polycarbonate resin A-1: Tafflon FN3000A [manufactured by Idemitsu Kosan Co., Ltd., molecular weight 29300] OH terminal fraction 5 mol% A-2: Toughlon FN2600A [manufactured by Idemitsu Kosan Co., Ltd., molecular weight 25400] OH terminal fraction 4 mol% A-3: Toughlon FN2200A [manufactured by Idemitsu Kosan Co., Ltd., molecular weight 21500] OH terminal fraction 3 mol% A-4: PC manufactured by the melting method [Molecular weight 19,000] OH terminal fraction 40 mol% In an autoclave made of SUS316 with an internal volume of 30 liters, bisphenol A 4560 g (20 mol) and diphenyl carbonate 4450 g (20.8 mol) were charged, and tetramethylammonium hydroxide (TMAH) was used as a catalyst 2.5 × 10 with respect to bisphenol A.^-4Mol, tetraphenylphosphonium tetraphenyl borate (TPPK manufactured by Hokuko Chemical Industry Co., Ltd.) 1 x 10^-5Add moles, heat at 210 ° C for 30 minutes, then gradually raise the temperature to 240 ° C, 270 ° C, 290 ° C, gradually increase the degree of vacuum, and finally stir and mix at 0.4 mmHg for 2 hours. , The polycarbonate shown in A-4 above was obtained. The amount of terminal hydroxyl groups (OH terminal fraction) is determined after 70 mg of polycarbonate resin is dissolved in 0.6 mL of deuterated chloroform at room temperature.¹Measure H-NMR (¹H nuclear resonance frequency: 500MHz, observation frequency range: 10000Hz, number of integrations: 256), peak a (7.06, 7.05ppm) derived from the terminal hydroxyl group, hydrogen peak of phenyl at the terminal bisphenol A (6.67, 6.65ppm) And c (4.87ppm). (B) Polyolefin resins and / or polyolefin elastomers containing epoxy or glycidyl groups B-1: Ethylene-GMA copolymer [Sumitomo Chemical Co., Ltd., Bond First E, GMA content 12% by mass] B-2: Polypropylene-GMA graft copolymer [Polypropylene, GMA and organic peracid] After blending the products, they are melt-kneaded by batch kneading], GMA content 9% by mass] (C) Polyethylene resin C-1: Polypropylene homopolymer [manufactured by Prime Polymer Co., Ltd., J-3000GP, MI = 30g / 10 minutes] C-2: Polypropylene block polymer [manufactured by Prime Polymer Co., Ltd., J-785H, MI = 15g / 10 minutes] C-3: Polypropylene block polymer [Prime Polymer Co., Ltd., E-185G, MI = 0.35g / 10 minutes] C-4: High Density Polyethylene [Prime Polymer Co., Ltd., Hi-Zex 1300J, MI = 12g / 10 minutes] (D) Phosphine compound D-1: Triphenylphosphine [manufactured by Hokuko Chemical Industry Co., Ltd., TPP] D-2: Tri-p-tolylphosphine [manufactured by Hokuko Chemical Industry Co., Ltd., TPTP] D-3: Tris (4-methoxyphenyl) phosphine [manufactured by Hokukosan Chemical Industry Co., Ltd., TPAP] (E) Ammonium hydroxydos E-1: Tetramethylammonium hydroxide [manufactured by Wako Pure Chemical Industries, Ltd.] (F) Phosphorus flame retardant F-1: Aromatic condensed phosphoric acid ester flame retardant [manufactured by Daihachi Chemical Industry Co., Ltd., CR-741] (G) Fluorine-containing polymer G-1: Polytetrafluoroethylene [manufactured by Asahi Glass Co., Ltd., PTFE CD076] (H) Phosphorus-containing antioxidant H-1: Phosphite-based antioxidant ADEKA STAB C [manufactured by ADEKA Corporation]</p><p>&lt;Manufacturing method of test piece&gt; As an extruder, a twin-screw extruder with a vent [manufactured by Japan Steel Works, Ltd., TEX44] having two supply ports is used, the set temperature is set to 250 ° C, the screw rotation speed is 300 rpm, and the discharge rate is 100 kg / hour. The components A, B, D, E, and G shown in 1 were melt-kneaded, and the C component and, if necessary, the F and H components were added to the downstream side of the vent port to obtain the desired pellets. Then, a test piece was prepared as follows.</p><p> For Examples 1, 2, 5 and Comparative Examples 1 and 2, the obtained pellets were dried at 110 ° C. for 6 hours or more, and then the tensile test piece and the chemical resistance test piece (TP) were formed at a molding temperature of 260. Molded at ° C and mold temperature 60 ° C. A square plate with a thickness of 1.5 mm was molded at a molding temperature of 280 ° C and a mold temperature of 80 ° C. For Examples 3, 4, 6 and Comparative Examples 3 to 6, the obtained pellets were dried at 120 ° C. for 6 hours or more, and then the tensile test piece and the chemical resistance test piece (TP) had a molding temperature of 280. Molded at ° C and mold temperature 80 ° C. Square plates with a thickness of 1.5 mm and 1.2 mm were molded at a molding temperature of 280 ° C and a mold temperature of 80 ° C.</p><p>&lt;Evaluation method&gt; (1) Tensile strength, tensile elastic modulus, tensile elongation A tension dumbbell with a thickness of 3.2 mm was manufactured and evaluated in accordance with JIS K7162.</p><p>(2) Chemical resistance A 125 x 13 x 3.2 mm test piece is injection molded, subjected to 0.7% strain by a 3-point bending test method with a span distance of 80 mm, then covered with a cloth impregnated with Magiclin, and 168 at 23 ° C. After leaving it for a while, the change in appearance was confirmed. The test was conducted with a sample size of (n) 3, and evaluation was performed according to the following criteria. "" for all three with no change in appearance "" for those with even one minute crack If even one crack can be seen, "x"</p><p>(3) Peeling resistance (a) Evaluation of peelability (surface peeling) of the film gate Specimens of 150 × 150 mm square with thicknesses of 1.5 mm and 1.2 mm were molded with a film gate (width 50 mm, thickness 1 mm) filling time of 1.2 seconds, respectively. Then, a grid tape peeling test was conducted in accordance with JIS D0202-1988. 100 grids were made at 1 mm intervals 1 to 2 cm from the center of the gate of the obtained test piece, and cellophane tape ("CT24], manufactured by Nichiban Co., Ltd.) was used to bring them into close contact with the pad of the finger. After that, it was peeled off in the 90 ° direction. The judgment was expressed by the number of squares that did not peel off out of 100 squares, 100/100 when the surface layer did not peel off, and 0/100 when it was completely peeled off. In this surface peelability test, the system containing the flame retardant is thin and easy to peel off, and the system containing the flame retardant is difficult to peel off. However, in the system without flame retardant, no clear difference appeared in the evaluation of peelability at a thickness of 1.5 mm. Therefore, in the system containing no flame retardant, the thickness was reduced to 1.2 mm, and the peelability was evaluated under the condition that peeling was more likely to occur. (b) Peeling evaluation by bending test The tensile test piece was bent from the center until both ends were attached, and then bent in the same direction in the same direction. The peelability was evaluated by the number of times wrinkles were generated on the surface. 10 times or more was set to "10 &lt;". As the test piece at this time, a test piece having a thickness of 3.2 mm was used as in the tensile test.</p><p>(4) Flame retardant It was performed using a test piece of 125 x 12.5 x 1.5 mm in accordance with UL94.</p><p>[Examples 1 to 6 and Comparative Examples 1 to 6] The test pieces were prepared by the method described in the above-mentioned method for producing the test pieces at the blending ratios shown in Table 1, and the physical properties were evaluated by the above-mentioned method. The results obtained are shown in Table 1.</p><p><tables num="1"><img file="JP2012144604A_D0001.tif" /></tables></p><p> According to Table 1, it can be seen that even in the case of a thin-walled molded product having a film gate, a molded product having excellent surface peelability and not exhibiting layered peeling can be obtained.</p>

The polycarbonate resin composition of the present invention is excellent in fluidity and chemical resistance, and is also excellent in impact resistance and bending strength, and is therefore useful for housings of automobile parts, electronic devices, information devices, and the like.