KR101378865B1 - Polycarbonate resin composition having both good uninflammability and good impact resistance and molded article thereof - Google Patents

Abstract

The present invention relates to a polycarbonate resin composition and a molded article thereof having excellent flame retardancy and impact resistance, and more particularly, 40 to 98% by weight of polycarbonate resin, 1 to 30% by weight of styrene copolymer and rubber-styrene graft. It relates to a polycarbonate resin composition comprising 100 parts by weight of a base resin consisting of 1 to 30% by weight of copolymer, 1 to 20 parts by weight of a phosphorus flame retardant, 0.1 to 20 parts by weight of an inorganic filler and 0.1 to 5 parts by weight of a metal salt flame retardant, and molded articles thereof. .

Description

POLYCARBONATE RESIN COMPOSITION HAVING BOTH GOOD UNINFLAMMABILITY AND GOOD IMPACT RESISTANCE AND MOLDED ARTICLE THEREOF}

The present invention relates to a polycarbonate resin composition and a molded article thereof having excellent flame retardancy and impact resistance, and more particularly, 40 to 98% by weight of polycarbonate resin, 1 to 30% by weight of styrene copolymer and rubber-styrene graft. It relates to a polycarbonate resin composition comprising 100 parts by weight of a base resin consisting of 1 to 30% by weight of copolymer, 1 to 20 parts by weight of a phosphorus flame retardant, 0.1 to 20 parts by weight of an inorganic filler and 0.1 to 5 parts by weight of a metal salt flame retardant, and molded articles thereof. .

Since polycarbonate resins have excellent heat resistance and strength, particularly impact strength and transparency, they are widely used as electrical parts, mechanical parts, and industrial resins.

In their widespread use, especially in automotive applications, when applied as metal substitutes, it is necessary to improve the stiffness or impact resistance and reduce the degree of thermal expansion while maintaining good ductility and fluidity. On the other hand, its use is gradually being extended, so that the flame retardancy is also required to minimize the damage in the event of a fire related to them.

In order to impart flame retardancy to the polycarbonate composition, an inorganic additive and a phosphorus flame retardant have been commonly used together. However, these additives improve the flame retardancy, but have a very negative effect on mechanical properties such as impact resistance of the polycarbonate resin composition.

Therefore, there is a demand for the development of a polycarbonate resin composition which can improve mechanical properties such as impact resistance while showing excellent flame resistance using inorganic additives and phosphorus flame retardants.

The present invention is to solve the above problems of the prior art, even when adding an inorganic additive and a phosphorus flame retardant to the polycarbonate resin composition, while maintaining a high rigidity, excellent impact resistance, and also excellent flame retardancy polycarbonate resin It is a technical subject to provide a composition and its molded article.

The present invention to solve the above technical problem, polycarbonate resin 40 to 98% by weight, styrenic copolymer 1 to 30% by weight and rubber-styrene graft copolymer consisting of 1 to 30% by weight of the base resin, phosphorus-based It provides a polycarbonate resin composition comprising 1 to 20 parts by weight of a flame retardant, 0.1 to 20 parts by weight of an inorganic filler and 0.1 to 5 parts by weight of a metal salt flame retardant.

According to another aspect of the present invention, there is provided a molded article of the polycarbonate resin composition of the present invention.

Since the polycarbonate resin composition according to the present invention exhibits excellent flame resistance, heat resistance, thermal stability, as well as excellent mechanical strength (stiffness), impact resistance and dimensional stability, and shows excellent results in shortening the injection solidification time, Molded article), for example, it can be suitably used for various molded parts such as electronic material housing, automobile frame, etc., which require high rigidity, high impact resistance, flame retardancy, and high heat resistance.

Hereinafter, the resin composition of this invention is demonstrated more concretely by the component.

(a) polycarbonate resin

The resin composition of this invention contains a polycarbonate resin, More specifically, a thermoplastic aromatic polycarbonate resin. Thermoplastic aromatic polycarbonate resins can be produced from dihydric phenols, carbonate precursors, molecular weight modifiers to control molecular weight and the like. The dihydric phenols may be any substance derived from the structure of Formula 1, for example.

[Formula 1]

In Formula 1, X is a divalent organic group having or without functional groups such as alkyl group, sulfide, ether, sulfoxide, sulfone, ketone and the like. Preferably X represents a straight, branched or cyclic alkyl group, more preferably X represents a straight, branched or cyclic alkyl group containing 1 to 10 carbons. R ₁ and R ₂ represent hydrogen, a halogen atom, a straight, branched or cyclic alkyl group. On the other hand, n and m are independently integers of 0-4.

Non-limiting examples of the dihydric phenols include bis (4-hydroxyphenyl) methane, bis (4-hydroxyphenyl) phenylmethane, bis (4-hydroxyphenyl) naphthylmethane, bis (4-hydroxy Phenyl)-(4-isobutylphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, 1-ethyl-1,1-bis (4-hydroxyphenyl) propane, 1-phenyl-1, 1-bis (4-hydroxyphenyl) ethane, 1-naphthyl-1,1-bis (4-hydroxyphenyl) ethane, 1,2-bis (4-hydroxyphenyl) ethane, 1,10-bis (4-hydroxyphenyl) decane, 2-methyl-1,1-bis (4-hydroxyphenyl) propane, 2,2-bis (4-hydroxyphenyl) propane (bisphenol A) and the like. Representative of these is bisphenol A.

It is preferable to apply phosgene (carbonyl chloride) as said carbonate precursor as another monomer of polycarbonate resin. Other non-limiting examples of such carbonate precursors include carbonyl bromide, bis halo formate, diphenyl carbonate or dimethyl carbonate and the like.

The molecular weight modifier may use a monofunctional compound similar to the materials already known, that is, the monomers used to prepare the thermoplastic aromatic polycarbonate resin.

By way of non-limiting example, derivatives based on phenols (e.g., para-isopropylphenol, para-tert-butylphenol, para-cumylphenol, para-isooctylphenol, para-isononylphenol, etc.) In addition, various kinds of substances such as aliphatic alcohols can be used, and among them, para-tert-butylphenol (PTBP) is most preferably applied.

Examples of the aromatic polycarbonate resin prepared from such a dihydric phenol, a carbonate precursor and a molecular weight modifier include linear polycarbonate resins, branched polycarbonate resins, copolycarbonate resins and polyester carbonate resins .

In embodiments of the invention, it is suitable for the polycarbonate resin to comprise in particular branched polycarbonate resin. Branched polycarbonate resins are advantageous in achieving good flame retardancy and reducing the tendency of the specimen to drip during flame retardant tests due to the excellent melt strength and morphological stability of the resin itself.

The branched polycarbonate resin is preferably mixed at 10 to 50% by weight of the total polycarbonate resin. If the branched polycarbonate content is less than 10% by weight, the anti-dripping effect may be insignificant in the flame retardant test, and if the content exceeds 50% by weight, the resin may have problems in processing due to an increase in the melt viscosity. have.

On the other hand, in the embodiments of the present invention, the thermoplastic aromatic polycarbonate resin, the viscosity average molecular weight (M _v ) measured in the methylene chloride solution is preferably 17,000 to 40,000, more preferably 20,000 to 30,000. When the viscosity average molecular weight is less than 17,000, mechanical properties such as impact strength and tensile strength may be lowered, and when the viscosity average molecular weight exceeds 40,000, problems may occur in processing of the resin due to an increase in melt viscosity.

Such polycarbonate resin contains 40 to 98% by weight, preferably 60 to 96% by weight, more preferably 80 to 90% by weight in the base resin mixture. If the polycarbonate resin content in the base resin mixture is less than 40% by weight, the mechanical properties such as heat resistance and flexural strength may be lowered. If it exceeds 98% by weight, the impact strength is lowered and the melt viscosity is increased. There can be.

(b) Styrene-based  Copolymer

The resin composition of the present invention further contains a styrene copolymer resin as one component of the base resin.

In an exemplary embodiment, the styrenic copolymer resin includes (i) 50 to 95 wt% of styrene, α-methylstyrene, halogen or alkyl substituted styrene or mixtures thereof and (ii) acrylonitrile, methacrylonitrile Styrenic copolymers obtained by copolymerizing 5 to 50% by weight of C1-C8 methacrylic acid alkyl esters, C1-C8 acrylic acid alkyl esters, maleic anhydride, C1-C8 alkyl or phenyl N-substituted maleimides or mixtures thereof Or mixtures thereof.

C1-C8 methacrylic acid alkyl esters or C1-C8 acrylic acid alkyl esters used in the production of the styrene copolymer resin are monohydryls each containing 1 to 8 carbon atoms as esters of methacrylic acid or acrylic acid, respectively. Esters obtained from alcohols. Non-limiting examples thereof include methacrylic acid methyl ester, methacrylic acid ethyl ester, acrylic acid ethyl ester or methacrylic acid propyl ester.

In embodiments of the invention, preferred examples of styrenic copolymer resins are those prepared from monomer mixtures of styrene and acrylonitrile and optionally methacrylic acid methylester, or α-methylstyrene and acrylonitrile and optional And those prepared from monomer mixtures of methacrylic acid methyl esters.

The styrene / acrylonitrile copolymer can be produced by emulsion polymerization, suspension polymerization, solution polymerization, or bulk polymerization, and preferably has a weight average molecular weight of 15,000 to 300,000. When the weight average molecular weight of the styrene-based copolymer resin is less than 15,000, mechanical properties such as impact strength and tensile strength may be lowered. When the weight average molecular weight is over 300,000, problems may occur in processing of the resin due to an increase in melt viscosity.

In the embodiments of the present invention, the styrenic copolymer resin may be used alone or in the form of a mixture of two or more thereof, and may be 1 to 30% by weight, preferably 2 to 20% by weight, more preferably 5 in the basic resin mixture. It is used in the range of -10 wt%. If the styrene-based copolymer resin content in the base resin mixture is less than 1% by weight, the impact resistance may be insignificant, and in the case of more than 30% by weight, mechanical properties such as flexural modulus and heat resistance may be lowered. have.

The thermoplastic styrene-based copolymer resin may be produced as a by-product in the preparation of the rubber-modified vinyl-based graft copolymer described below. In particular, it is possible to produce more when grafting an excess monomer mixture to a small amount of rubbery polymer or when an excessive amount of a chain transfer agent used as a molecular weight control agent is used. The by-product of such a rubber-modified vinyl graft copolymer is not included in the content of the styrene-based copolymer resin in the basic resin mixture described herein.

(c) rubber-styrene Graft  Copolymer

The resin composition of the present invention contains a rubber-styrene graft copolymer which is a rubber-modified vinyl graft copolymer as one component of the base resin.

In an exemplary embodiment, the rubber-styrene graft copolymer comprises 50 to 95 weight percent of styrene, α-methylstyrene, halogen or alkyl substituted styrene, or mixtures thereof; And acrylonitrile, methacrylonitrile, C1-C8 methacrylic acid alkyl esters, C1-C8 acrylic acid alkyl esters, maleic anhydride, C1-C8 alkyl or phenyl N-substituted maleimides, or mixtures thereof. Monomer mixture (C.1) consisting of 5% by weight of butadiene rubber, acrylic rubber, ethylene / propylene rubber, styrene / butadiene rubber, acrylonitrile / butadiene rubber, isoprene rubber, ethylene-propylene-diene It can be obtained by graft copolymerization to 5 to 95 weights of at least one rubbery polymer (C.2) selected from the group consisting of copolymer (EPDM) and polyorganosiloxane / polyalkyl (meth) acrylate rubber composites.

C1-C8 methacrylic acid alkyl esters or C1-C8 acrylic acid alkyl esters used in the preparation of the rubber-styrene graft copolymer are monohydroxy containing 1 to 8 carbon atoms as esters of methacrylic acid or acrylic acid, respectively. Esters obtained from drill alcohols.

In embodiments of the present invention, it is preferable that the average particle diameter (d ₅₀ ) of the rubbery polymer (C.2) is from 0.05 to 4 ㎛ to improve the impact strength and the surface properties of the molding. Here, the average particle diameter d ₅₀ refers to the diameter in which 50% of the particles are present above and below the value, respectively. It is an ultra-centrifuge assay (eg, W. Scholtan et al. Kolloid-Z. und Z. Polymere 250 (1972), p. 782 to 796].

When the average particle diameter (d ₅₀ ) of the rubbery polymer is less than 0.05㎛ The improvement of impact resistance and mechanical properties is insignificant. Due to the deterioration of dispersibility and cohesiveness, even surface characteristics cannot be expected and the heat deformation temperature and mechanical properties of the resin composition are reduced.

The rubber-styrene graft copolymer may be prepared by a known method, and for example, may be prepared by emulsion polymerization, suspension polymerization, solution polymerization, bulk polymerization, and the like.

The content of the rubber-styrene graft copolymer in the base resin mixture used in the resin composition according to the present invention is 1 to 30% by weight, preferably 2 to 20% by weight, more preferably 5 to 10% by weight. When the content of the rubber-styrene graft copolymer in the base resin mixture is less than 1% by weight, the impact resistance may be insignificant. When the content of the rubber-styrene graft copolymer is more than 30% by weight, other mechanical properties such as heat resistance and surface formability may be deteriorated. May occur.

(d) Take over Flame retardant

The resin composition which concerns on this invention contains a phosphorus flame retardant. As the phosphorus flame retardant, a phosphate ester compound may be used. In a non-limiting example, the phosphate ester compound is preferably a phosphate ester compound represented by the following Chemical Formula 2.

(2)

In Formula 2, R ₁ , R ₂ , R ₃ and R ₄ are each independently of one another, optionally halogen substituted C ₁ -C ₈ Alkyl, preferably C ₁ -C ₄ alkyl or C ₅ -C ₆ cycloalkyl, C ₆ -C ₂₀ aryl or C ₇ -C ₂₀ aralkyl unsubstituted or substituted with halogen atoms. Particularly preferred aryl groups are cresyl, phenyl, xylenyl, propylphenyl or butylphenyl and their corresponding brominated or chlorinated derivatives. X is a C6-C30 mononuclear aromatic or polynuclear aromatic group, which may be substituted by diphenylphenol, bisphenol A, resorcinol or hydroquinone, or chlorinated or brominated derivatives thereof. n may be 0 or 1 independently of each other, preferably 1. N is 0-10 as an average value, Preferably it is 0.3-8, More preferably, it is 0.5-5.

In the present invention, as the phosphorus-based flame retardant, monophosphate, oligophosphate or a mixture thereof may be used. In a non-limiting example, preferred examples of phosphate ester compounds are selected from resorcinol bis (diphenyl phosphate), bisphenol-A bis (diphenyl phosphate), resorcinol bis (di 2,6-dimethylphenyl phosphate) It may include one or more.

In the resin composition according to the present invention, the phosphorus-based flame retardant is used in an amount of 1 to 20 parts by weight, preferably 5 to 15 parts by weight, and more preferably 8 to 13 parts by weight, based on 100 parts by weight of the base resin. If the amount of the phosphorus flame retardant is less than 1 part by weight with respect to 100 parts by weight of the base resin, the flame retardancy becomes poor, and if it exceeds 20 parts by weight, the mechanical strength and the heat resistance decrease.

(e) weapons filler

The resin composition according to the present invention contains an inorganic filler. As the inorganic filler, it is particularly desirable to increase the melt stability due to the thixotropy effect and to improve the flame retardancy of the molding composition.

The inorganic fillers include, average particle size (d ₅₀₎ is used 1 ~ 10㎛ size of single or mixed inorganic filler. Preferably, an average particle diameter (d ₅₀ ) of 1 to 4 μm can be used.

Here, as described above, the average particle diameter d ₅₀ refers to a diameter in which 50% of particles exist above and below the value, respectively, and the ultra-centrifuge measurement method (eg, W. Scholtan et al., Kolloid-Z. und Z. Polymere 250 (1972), p. 782 to 796].

The inorganic filler may be, for example, particulate, flake or fibrous. As a non-limiting example, mica, quartz powder, titanium dioxide, silicates, aluminosilicates can be used. Also, for example chalk, wollastonite, mica lamellar clay minerals, montmorillonite, especially montmorillonite in the form of ion exchange modified liporgano, talc, kaolin, zeolite, vermiculite, aluminum oxide, silica, magnesium hydroxide, aluminum hydroxide, Glass fibers, glass flakes and the like can be used. Mixtures of different inorganic materials can also be used, preferably. Talc or mica can be used.

The pure chemical composition of mica is 3MgO.4SiO ₂ .H ₂ O, MgO content 31.9% by weight, SiO ₂ content 63.4%, chemically bound water content 4.8% by weight. This is a silicate having a layered structure.

In the resin composition according to the present invention, the inorganic filler is used in an amount of 0.1 to 20 parts by weight, preferably 1 to 15 parts by weight, and more preferably 5 to 10 parts by weight, based on 100 parts by weight of the base resin. When the usage-amount of an inorganic filler is less than 0.1 weight part with respect to 100 weight part of base resins, flame retardance will become low, and when it exceeds 20 weight part, mechanical strength and heat resistance will fall.

Inorganic fillers may be added to the polycarbonate composition or blend to increase the stiffness, but our research results indicate that mechanical or physical properties are limited due to the addition of the inorganic filler itself. However, when inorganic fillers, particularly talc or mica, are contained in the polycarbonate composition, varying particle sizes of the inorganic fillers can not only provide improved rigidity and impact resistance than conventional polycarbonate blends, but also have excellent flame retardant properties. Can be.

In preferred embodiments of the present invention, polycarbonate resins, styrene copolymer resins, rubber-styrene graft copolymers as described above are used as the base resin of the thermoplastic resin composition, and thus the average particle diameter (d ₅₀ ) 1 to 1 By blending an inorganic filler of 10 μm, improved uniformity of impact strength along the injection flow direction could be suitably achieved with improved mechanical properties, impact resistance, dimensional accuracy (dimension stability), and the like.

(f) metal salts Flame retardant

The resin composition according to the present invention includes a metal salt flame retardant. As the metal salt flame retardant, an organic alkali metal salt or an organic alkaline earth metal salt may be used, and examples thereof include alkali metal salts or alkaline earth metal salts of organic acids or organic acid esters having at least one carbon atom. The organic acid or organic acid ester may include, for example, eutectic acid, organic carboxylic acid, polystyrene sulfonic acid, and the like, which may be substituted with halogen such as fluorine, chlorine and bromine. Alkali metals are sodium, potassium, lithium, cesium and the like, and alkaline earth metals are magnesium, calcium, strontium and barium. Of these, sodium, potassium and cesium salts are preferably used.

According to a preferred embodiment of the present invention, the potassium salt of 3- (phenylsulfonyl) benzenesulfonate, which is the potassium salt compound of formula 3, may be used as the metal salt flame retardant.

(3)

In the resin composition according to the present invention, the metal salt flame retardant is used in an amount of 0.1 to 5 parts by weight, preferably 0.2 to 4 parts by weight, and more preferably 0.5 to 3 parts by weight, based on 100 parts by weight of the base resin. When the amount of the metal salt flame retardant used is less than 0.1 part by weight with respect to 100 parts by weight of the base resin, the flame retardancy becomes poor, and when it exceeds 5 parts by weight, the mechanical properties are drastically lowered.

In addition to the above components, the resin composition according to the present invention may be used by adding conventional additives such as heat stabilizers, mold release agents, antioxidants, light stabilizers, ultraviolet absorbers, pigments, or dyes.

The polycarbonate resin composition according to the present invention can be produced into a molded article by a known molding method such as injection. Such molded products may exhibit high rigidity, high impact resistance, high dimensional accuracy, and good flame retardancy. Therefore, the frame of a device including optical housing units such as printers, copiers, and projector devices, as well as housings of small and high-tech IT equipment such as laptops and mobile phones, etc. It can be usefully used in the back.

Hereinafter, the present invention will be described in more detail with reference to non-limiting and exemplary embodiments, but the scope of the present invention is in no way limited by these examples.

[Examples 1-3 and Comparative Examples 1-4]

The compositions of Examples 1 to 3 and Comparative Examples 1 to 4 were prepared in the proportions shown in the following [Table 1]. That is, each component was premixed together in a high speed mixer with the corresponding composition and then mixed in a 250 ° C. extruder. After molding the prepared compositions, their physical properties were measured as described below. Specific details of such a physical property test are known to those skilled in the art and can be summarized as follows.

Property measurement

Impact resistance (notched Izod impact strength):

ASTM D-256. It was determined using molded Izod Notched Strength (INI) bars of 4 mm thickness. The joule energy used to break a specimen is defined as the value divided by the specimen area at the notch. The results are measured in kgfcm / cm.

Heat Deflection Temperature:

The load deflection temperature with increasing temperature was measured according to ASTM D-648. (Test Specimen Dimensions: Length 127mm x Width 12.7mm x Thickness 6.4mm)

-Flame Retardant:

Flame retardancy was performed by UL 94 V test. The material sample was 127 mm long x 12.7 mm wide, and was uniformly formed to a thickness of 0.8 mm, which was thinly formed at 1/2 level compared to 1/16 ”.

The specimen was mounted vertically so that the underside of the test material was in each case 305 mm above the strip of dressing material. Each test specimen was ignited individually by two successive ignition operations of 10 seconds duration, and the combustion characteristics were observed and the materials evaluated after each ignition operation. The material was burned using a burner with a blue flame of 3.73 × 10 4 kJ / m ³ (1000 BTU per square foot) of natural gas located at a height of 100 mm (3.8 inches).

The UL 94 V-0 classification includes the following properties of materials tested according to the UL 94 V method. This type of molding composition did not include any samples that burned for longer than 10 seconds after each exposure to the test flame. They should not exceed 50 seconds total burn time when all the sparks are exposed to each sample set. In addition, these are considered failures if the lights do not go out for more than 30 seconds after the test flame has been removed.

A different UL 94 classification means that thinner samples at the same flame retardant class (V-0) have better self-extinguishing. As V-1 and V-2 go down to a lower vertical combustion rating, which means poor flame retardancy. Table 1 shows the test results.

[Table 1]

1) Bisphenol A polycarbonate Mw (g-mol) = 20,000

2) ABS graft polymer comprising polybutadiene, styrene, acrylonitrile

3) Styrene-acrylonitrile copolymer containing acrylonitrile

4) Talc: Talc having an average particle diameter of 2.5 mu m

5) Metal salt flame retardant: potassium salt of 3- (phenylsulfonyl) benzenesulfonate (Potassium 3- (phenylsulfonyl) benzenesulfonate)

6) Additives: heat stabilizer, wax, anti-driping agent

7) The time that the fire on the specimen is extinguished. The shorter the better the flame retardancy.

As can be seen from Table 1, by using a small amount of metal salt flame retardant in combination with a phosphorus-based flame retardant + inorganic filler, it was possible to obtain the highest level of flame retardancy without the excessive prescription of the phosphorus-based flame retardant, the molding composition is notch impact strength and thermal deformation It showed very good mechanical properties even at temperature. As a result, it is possible to secure a high level of flame retardancy and heat resistance within the range of no loss of impact strength, and the main mechanical properties are satisfied at the same time.

Claims (11)

100 parts by weight of the base resin consisting of 40 to 98% by weight of polycarbonate resin, 1 to 30% by weight of styrene copolymer and 1 to 30% by weight of rubber-styrene graft copolymer, 8 to 13 parts by weight of phosphorus flame retardant, inorganic filler 5 To 10 parts by weight and 0.5 to 3 parts by weight of a metal salt flame retardant,
The phosphorus flame retardant is a phosphate ester compound represented by the following [Formula 2],
The metal salt flame retardant is a potassium salt of 3- (phenylsulfonyl) benzenesulfonate of the following [Formula 3],
Polycarbonate resin composition:
(2)

(In Formula 2, R ₁ , R ₂ , R ₃ and R ₄ are each independently of each other, optionally halogenated C ₁ -C ₈ alkyl, C ₆ -C ₂₀ aryl or C ₇ -C ₂₀ aralkyl. , n is 0 or 1 independently of each other, N is 0 to 10, X is a mononuclear aromatic or polynuclear aromatic group having 6 to 30 carbon atoms;
(3)

. The polycarbonate resin composition according to claim 1, wherein 10 to 50% by weight of the polycarbonate resin branched in the whole polycarbonate resin is contained. The method of claim 1, wherein the styrenic copolymer resin is 50 to 95% by weight of styrene, α-methylstyrene, halogen or alkyl substituted styrene or mixtures thereof; And acrylonitrile, methacrylonitrile, C1-C8 methacrylic acid alkyl esters, C1-C8 acrylic acid alkyl esters, maleic anhydride, C1-C8 alkyl or phenyl N-substituted maleimides or mixtures thereof Polystyrene resin composition characterized in that the copolymerized styrene-based copolymer. The method of claim 1 wherein the rubber-styrene graft copolymer
50 to 95% by weight of styrene, α-methylstyrene, halogen or alkyl substituted styrene or mixtures thereof; And acrylonitrile, methacrylonitrile, C1-C8 methacrylic acid alkyl esters, C1-C8 acrylic acid alkyl esters, maleic anhydride, C1-C8 alkyl or phenyl N-substituted maleimides or mixtures thereof 5 to 95 parts by weight of the monomer mixture consisting of;
Butadiene rubber, acrylic rubber, ethylene / propylene rubber, styrene / butadiene rubber, acrylonitrile / butadiene rubber, isoprene rubber, ethylene-propylene-diene terpolymer (EPDM) and polyorganosiloxane / polyalkyl (meth) acrylate 5 to 95 parts by weight of one or more rubbery polymers selected from the group consisting of rubber composites
Polycarbonate resin composition characterized in that the graft copolymer rubber-styrene graft copolymer. The polycarbonate resin composition according to claim 4, wherein the average particle diameter (d ₅₀ ) of the rubbery polymer component is 0.05 to 4 mu m. delete The polycarbonate resin composition according to claim 1, wherein the average particle diameter d ₅₀ of the inorganic filler is 1 to 10 µm. The polycarbonate resin composition according to claim 1, wherein the inorganic filler is talc or mica. delete delete A molded article of the polycarbonate resin composition according to any one of claims 1 to 5, 7 and 8.