JPH05222283A - Polycarbonate resin composition - Google Patents

Abstract

PURPOSE:To obtain a polycarbonate resin composition having high rigidity and giving a molding having excellent appearance by compounding a polycarbonate resin with an aromatic polyester resin, a rubbery elastomer, an inorganic filler and a phosphite antioxidant at specific ratios. CONSTITUTION:The objective composition is composed of (A) a polycarbonate resin, (B) an aromatic polyester resin, (C) a rubbery elastomer, (D) an inorganic filler such as talc and mica and (E) a phosphite-type antioxidant such as bis(2,6- di-t-butyl-4-methylphenyl)pentaerythritol diphosphite. The amounts of the components A, B, C and D are 10-50wt.%, 10-50wt.%, 0-50wt.% and 1-30wt.%, respectively, and the amount of the component E is 0.01-5 pts.wt. based on 100 pts.wt. of A+B+C+D.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polycarbonate resin composition, and more particularly, it relates to a polycarbonate resin composition capable of obtaining a molded article having high rigidity and good appearance.

[0002]

2. Description of the Related Art Polycarbonate resins are excellent in mechanical strength, electrical characteristics and transparency, and are widely used as engineering plastics in various fields such as automobile field, electric / electronic equipment field. There is. For example, for interior / exterior materials in the field of automobiles or housing materials in the field of electric / electronic devices, a polycarbonate resin having such characteristics is used.
Aromatic polyester resins and rubber-like elastic materials are blended, or these resin compositions are further blended with fine inorganic fillers such as talc and mica to obtain molded articles with high rigidity and good appearance. I have to. However, since these inorganic fillers are alkaline, the polycarbonate resin or the aromatic polyester resin is hydrolyzed during the molding process, which causes the deterioration of strength due to the decrease of the molecular weight. Further, due to this, the molded product causes yellowing or deterioration of smoothness due to surface roughening, which deteriorates the appearance.

[0003]

Therefore, the present inventors have
The inventors have conducted intensive studies to develop a polycarbonate resin composition that eliminates the drawbacks of the conventional method and can obtain a molded product having high rigidity and good appearance. As a result, they have found that a polycarbonate resin composition having desired properties can be obtained by adding a specific antioxidant to the polycarbonate resin composition. The present invention has been completed based on such findings. That is, the present invention is
A polycarbonate resin composition comprising (A) a polycarbonate resin, (B) an aromatic polyester resin, (C) a rubber-like elastic body, (D) an inorganic filler, and (E) a phosphite-based antioxidant, and (A) ) Polycarbonate resin 30 to 89% by weight, (B) Aromatic polyester resin 10
To 50% by weight, (C) rubber-like elastic body 0 to 50% by weight, and (D) inorganic filler 1 to 30% by weight, and (A), (B), (C) and (D) in total of 100. The present invention provides a polycarbonate resin composition characterized in that (E) is 0.01 to 5 parts by weight with respect to parts by weight.

First, in the present invention, the polycarbonate resin (PC) used as the component (A) is represented by the general formula (I).

[0005]

[Chemical 1]

[Wherein X is a hydrogen atom, a halogen atom (for example, chlorine, bromine, fluorine, iodine) or a carbon number of 1 to 8]
When the number of X is plural, they may be the same or different, and a and b
Are integers of 1 to 4, respectively. Y is a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, or -S-, -S
_{O -, - SO 2 -,} - O -, - CO- bond or general formula (II)

[0007]

[Chemical 2]

The bond represented by ] It is a polymer which has a repeating unit represented by the following formula. The polycarbonate resin may be various ones, but is usually represented by the general formula (III)

[0009]

[Chemical 3]

(Wherein X, a, b and Y have the same meanings as described above) and are easily produced by reacting a dihydric phenol with a carbonate precursor such as phosgene or a carbonate compound. be able to. That is, for example, in a solvent such as methylene chloride,
Produced by reaction of a dihydric phenol with a carbonate precursor such as phosgene in the presence of a known acid acceptor or molecular weight regulator, or by transesterification reaction of a dihydric phenol with a carbonate precursor such as diphenyl carbonate. To be done. As the dihydric phenol represented by the general formula (III), there are various ones.
2-bis (4-hydroxyphenyl) propane [bisphenol A] is preferred. As dihydric phenols other than bisphenol A, bis (4
-Hydroxyphenyl) alkane; 1,1- (4-hydroxyphenyl) methane; 1,1- (4-hydroxyphenyl) ethane; hydroquinone; 4,4'-dihydroxydiphenyl; bis (4-hydroxyphenyl) cycloalkane; Bis (4-hydroxyphenyl) oxide; Bis (4-hydroxyphenyl) sulfide; Bis (4-hydroxyphenyl) sulfone; Bis (4-hydroxyphenyl) sulfoxide; Bis (4-hydroxyphenyl) ether; Bis (4-hydroxy) Phenyl)
Examples thereof include ketones and the like, bis (3,5-dibromo-4-hydroxyphenyl) propane; halogenated bisphenols such as bis (3,5-dichloro-4-hydroxyphenyl) propane, and the like. These dihydric phenols may be used alone or in combination of two or more. Examples of the carbonic acid ester compound include diaryl carbonate such as diphenyl carbonate and dialkyl carbonate such as dimethyl carbonate and diethyl carbonate. The polycarbonate resin may be a homopolymer using one of these dihydric phenols or a copolymer using two or more thereof. Further, it may be a thermoplastic random branched polycarbonate resin obtained by using a polyfunctional aromatic compound in combination with the dihydric phenol. The polycarbonate resin used in the present invention has a viscosity average molecular weight of 1 from the viewpoint of mechanical strength and moldability.
It is preferably from 0,000 to 100,000, particularly 15,000.
Those of 00 to 40,000 are preferable.

Various aromatic polyester resins can be used as the component (B). For example,
A polyester resin obtained by polymerizing a bifunctional carboxylic acid and an alkylene glycol is particularly preferable. here,
Specific examples of the difunctional carboxylic acid include aromatic carboxylic acids such as terephthalic acid, isoterephthalic acid, and naphthalenedicarboxylic acid. Among these,
Terephthalic acid is preferable, and other difunctional carboxylic acids can be used in combination as long as the effects of the present invention are not impaired.
For example, aliphatic carboxylic acids such as oxalic acid, malonic acid, adipic acid, suberic acid, azelaic acid, sebacic acid or decanedicarboxylic acid, and ester-forming derivatives thereof. The blending ratio of these other dicarboxylic acids is
Generally, it is preferably within 20 mol% with respect to the total dicarboxylic acid. Next, the alkylene glycol is not particularly limited, and specifically, for example, ethylene glycol; propylene-1,2-glycol; propylene-1,3-glycol; butylene-1,4-glycol; butylene-
2,3-glycol; hexane-1,6-diol; octane-1,8-diol; aliphatic diol having 2 to 15 carbon atoms such as neopentyl glycol or decane-1,10-diol, polyethylene glycol and the like are used. be able to. Further, two or more glycol components may be copolymerized. Polyethylene terephthalate and polybutylene terephthalate are particularly preferable as the polyester resin obtained by polymerizing such a bifunctional carboxylic acid and alkylene glycol.

The aromatic polyester resin as the component (B) can be produced by a usual method in the presence or absence of a polycondensation catalyst containing titanium, germanium, antimony or the like. For example, polyethylene terephthalate is usually obtained by esterifying terephthalic acid and ethylene glycol, or transesterifying a lower alkyl ester of terephthalic acid such as dimethyl terephthalate and ethylene glycol to obtain a glycol ester of terephthalic acid and / or It is produced by a first-step reaction for producing the low-polymer, and then a second-step reaction for further polymerizing the glycol ester and / or the low-polymer to obtain a polymer having a high degree of polymerization, a so-called polymerization reaction. It

Various materials can be used as the rubber-like elastic body as the component (C). For example, (1)
Examples thereof include those obtained by polymerizing one or more vinyl-based monomers in the presence of a rubber-like polymer obtained from a monomer mainly containing alkyl acrylate or alkyl methacrylate. Here, the alkyl acrylate or alkyl methacrylate has 2 to 1 carbon atoms.
Those having an alkyl group of 0 are preferable. Specific examples include ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate, and n-octyl methacrylate. As a rubber-like elastic body obtained from a monomer mainly composed of these alkyl acrylates,
70% by weight or more of the alkyl acrylates and other vinyl monomers copolymerizable therewith, for example, methyl methacrylate, acrylonitrile, vinyl acetate, styrene, etc. 3
A polymer obtained by reacting with 0% by weight or less is mentioned. In this case, a polyfunctional monomer such as divinylbenzene, ethylene dimethacrylate, triallyl cyanurate, and triallyl isocyanurate may be appropriately added as a cross-linking agent and reacted. Examples of the vinyl-based monomer reacted in the presence of the rubber-like polymer include aromatic vinyl compounds such as styrene and α-methylstyrene, acrylic acid esters such as methyl acrylate and ethyl acrylate, and methyl methacrylate. , Methacrylic acid esters such as ethyl methacrylate, and the like.

These monomers may be used alone or in combination of two or more. Further, it may be copolymerized with other vinyl type monomers such as vinyl cyanide compounds such as acrylonitrile and methacrylonitrile, vinyl ester compounds such as vinyl acetate and vinyl propionate. This polymerization reaction can be carried out by various methods such as bulk polymerization, suspension polymerization and emulsion polymerization. In particular, the emulsion polymerization method is suitable. The rubber-like elastic body thus obtained preferably contains 20% by weight or more of the rubber component. Specific examples of such a rubber-like elastic body include MAS resin elastic bodies such as a graft copolymer of 60 to 80% by weight of n-butyl acrylate and styrene or methyl methacrylate. As the MAS resin elastic body, for example, "KM-33
0 "(trade name, manufactured by Rohm &Haas)," Metaprene W "
529 ”(trade name, manufactured by Mitsubishi Rayon Co., Ltd.) and the like.

As the rubber-like elastic material, (2) a copolymer obtained by copolymerizing an alkyl acrylate or alkyl methacrylate with a polyfunctional monomer having a conjugated diene type double bond, The thing obtained by polymerizing 1 type (s) or 2 or more types of a vinyl-type monomer is mentioned. Examples of the alkyl acrylate and alkyl methacrylate include those exemplified in the above (1). Further, as the polyfunctional monomer having a conjugated diene type double bond,
Examples thereof include conjugated diene compounds such as butadiene and isoprene, and compounds having a non-conjugated double bond in addition to the conjugated diene type double bond in one molecule. Examples of such a compound include 1-methyl-2-vinyl-4,6-
Heptadiene-1-ol; 7-methyl-3-methylene-1,6-octadiene; 1,3,7-octatriene and the like.

In copolymerizing the above-mentioned alkyl acrylate or alkyl methacrylate with a polyfunctional monomer having a conjugated diene type double bond, an aromatic vinyl compound such as styrene or α-methylstyrene may be used, if necessary. Add vinyl cyanide compounds such as acrylonitrile and methacrylonitrile, vinyl ester compounds such as vinyl acetate and vinyl propionate, vinyl ether compounds such as methyl vinyl ether, and vinyl monomers such as vinyl halide compounds such as vinyl chloride. You can Further, a crosslinking agent such as ethylene dimethacrylate or divinylbenzene may be added. When the copolymer is produced by copolymerizing the alkyl acrylate or alkyl methacrylate with a polyfunctional monomer having a conjugated diene type double bond, a polyfunctional monofunctional monomer having a conjugated diene type double bond is used. The content of the unit in the copolymer is 0.1 to 2 during the copolymerization.
It is desirable to use it in a proportion such that it is 0% by weight, preferably 1 to 10% by weight.

Examples of the vinyl-based monomer to be polymerized in the copolymer thus obtained include those exemplified in the above (1). These vinyl-based monomers may be used alone or in combination of two or more. The polymerization reaction can be carried out by various methods such as bulk polymerization, suspension polymerization and emulsion polymerization. In particular, the emulsion polymerization method is suitable. Preferred examples of such a rubber-like elastic body include, firstly, alkyl (meth) acrylates such as n-butyl acrylate, 2-ethylhexyl acrylate and methyl methacrylate, and butadiene, and crosslinking agents such as ethylene dimethacrylate and divinylbenzene. Grafts obtained by copolymerizing a small amount of styrene, acrylonitrile, vinyl chloride and other vinyl-based monomers as graft component monomers into the resulting latex and graft polymerizing by a conventional method. A copolymer is mentioned. And secondly, a latex obtained by copolymerizing the above-mentioned alkyl (meth) acrylate with a compound having a non-conjugated double bond in addition to a conjugated diene type double bond in one molecule by a conventional method. A graft copolymer obtained by adding the above vinyl-based monomer as a graft component monomer to and graft polymerizing the same by a conventional method. The graft polymerization may be carried out at once, or may be carried out in multiple stages by changing the constituents of the graft component monomer. As such a rubber-like elastic body,
Specifically, octyl acrylate and butadiene are used in a weight ratio of 7: 3, and styrene and methyl methacrylate are added to a rubber latex obtained by copolymerization,
M such as a graft copolymer obtained by graft polymerization
An ABS resin elastic polymer may be used.

In addition, as the rubber-like elastic material, two or more kinds of compounds selected from methacrylic ester monomers, vinyl cyanide monomers and aromatic vinyl monomers are copolymerized in the presence of rubber. Also obtained are those obtained. Here, there are various rubbers, and specifically, diene rubber or a mixture of diene rubbers such as butadiene rubber (BR), isoprene rubber (IR), chloroprene (CR), piperylene rubber, and styrene-butadiene copolymer Polymer rubber, styrene-butadiene block copolymer rubber, acrylonitrile-butadiene copolymer rubber (N
BR), ethylene-propylene rubber (EPR),
Examples thereof include a terpolymer (EPT) obtained by copolymerizing ethylene and propylene with a small amount of a diene, isobutylene-isoprene rubber (IIR), ethylene-vinyl acetate rubber, chlorinated polyethylene, and epichlorohydrin rubber. Among these, butadiene rubber (BR) and styrene-
Butadiene rubber (SBR) is preferred. In addition, various methacrylic ester monomers can be used. Examples thereof include methyl methacrylate, ethyl methacrylate, propylene methacrylate, isopropylene methacrylate, butyl methacrylate and the like. Of these, methyl methacrylate is particularly preferable. And
Examples of the vinyl cyanide monomer include acrylonitrile and methacrylonitrile. Further, specific examples of the aromatic vinyl monomer include styrene and α-
Methyl styrene, o-methyl styrene, m-methyl styrene, p-methyl styrene, dimethyl styrene, chloro styrene etc. are mentioned.

These other rubber-like elastic materials contain two or more compounds selected from these methacrylic ester monomers, vinyl cyanide monomers and aromatic vinyl monomers in the presence of the rubber. , A solution polymerization method, a bulk polymerization method, a bulk-suspension polymerization method, and an emulsion polymerization method. In particular, when producing a thermoplastic resin having a large amount of rubber component, it is preferable to produce it by emulsion graft polymerization. Specifically, for example, emulsion polymerization of a methacrylic acid ester monomer and an aromatic vinyl monomer is carried out on a polybutadiene latex, and the resulting polybutadiene copolymer latex is treated with an inorganic acid or an inorganic salt such as aluminum sulfate. It can be produced by solidifying. Among the products thus obtained, a thermoplastic resin obtained by copolymerizing styrene-methyl methacrylate or styrene-acrylonitrile, particularly in the presence of polybutadiene or a butadiene copolymer containing 30% by weight or more of butadiene. Is preferred. The styrene may be a part or all of which is replaced with α-methylstyrene. Specifically, for example, methyl methacrylate-butadiene-styrene resin (MBS resin) and acrylonitrile-butadiene-styrene resin (ABS resin) are preferable.

There are various inorganic fillers as the component (D), and the inorganic fillers having an average particle diameter of 0.2 to 30 μm are used. Specifically, for example, talc,
Whiskers, flakes or powders of mica, calcium carbonate, potassium titanate, calcium silicate and the like are suitable. Among these, talc, mica powder and potassium titanate whiskers are particularly preferable, and talc is most preferable. These inorganic fillers may be surface-treated in advance or may be untreated. Examples of the surface treatment agent include chemical treatments with various treatment agents such as silane coupling agent type, higher fatty acid type, fatty acid metal salt type, unsaturated organic acid type, organic titanate type, resin acid type and polyethylene glycol type. Alternatively, physical surface treatment may be mentioned.

Here, as the inorganic filler, preferred talc has an average particle size of 0.2 to 10 μm, preferably 0.2 to.
The average particle size of 5 μm and mica is 1 to 30 μm, preferably 2 to 30 μm. The method for producing these talc and mica is not particularly limited, and for example, they can be produced by the following method. That is, the rough stone is crushed by a tube mill, an impact crusher,
Grind with a device such as a micron mill type crusher or a centrifugal roller type Raymond mill. If fine pulverization is required, a micron mill, jet type pulverizer, jet
It may be dry or wet finely pulverized by an o-mizer, a micronizer, a jet palpelizer, a stirring mill (tower mill), a vibration mill, a colloid mill or the like. Then, these crushed talc and mica are treated with a device such as cyclone, multilon, micron separator, microplex, cyclone air separator, ultra separator, jet cron, kuraskurokon, rake classifier, hydrocyclone, hydraulic classifier, centrifugal classifier, etc. It can be obtained by performing dry or wet classification by repeating once or plural times and adjusting the physical properties.

Further, various compounds can be used as the phosphite type antioxidant as the component (E). Specifically, for example, general formula (IV) (R ¹ O) ₃ P (IV) [In the formula, R ¹ is hydrogen or an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms. To an alkaryl group, an aralkyl group having 7 to 30 carbon atoms, or a halo group, an alkylthio group (wherein the alkyl group has 1 to 30 carbon atoms) or a hydroxy substituent, and three R ^{1 s} may be the same or different. May be. ] It is a phosphite compound represented by these. In addition, the general formula (V)

[0023]

[Chemical 4]

(Wherein R ² has the same definition as R ¹ above, two R ^2's may be the same or different from each other, and Z is the number of carbon atoms with or without an ether bond. It is a phosphite compound represented by 1 to 20 tetravalent hydrocarbon residues.). Among the phosphite compounds represented by the general formula (V), the general formula (VI)

[0025]

[Chemical 5]

A pentaerythritol type phosphite compound represented by the following formula is particularly preferable. In the present invention,
The phosphite-based antioxidant as the component (E) is not limited to the structure of the general formula (IV) or (V) as long as it is a phosphite-based antioxidant. And the phosphite antioxidant is
You may use these phosphite compounds 1 type or in combination of 2 or more types. Examples of the phosphite compound represented by the general formula (IV) include tris (mixed mono and di-nonylphenyl) phosphite, trisnonylphenyl phosphite, tris (2,4-di-).
t-butylphenyl) phosphite and the like. Examples of the phosphite compound represented by the general formula (V) include bis (2,4-di-t-butylphenyl) pentaerythritol diphosphite and bis (2,2).
6-di-t-butyl-4-methylphenyl) pentaerythritol diphosphite, distearyl pentaerythritol diphosphite and the like.

In the present invention, each of the components (A), (B),
A polycarbonate resin composition comprising (C), (D) and (E), and each component of (A), (B), (C) and (D) has 30 to 89 weight of (A). %, Preferably 50-89% by weight, (B) 10-50
% By weight, preferably 15-40% by weight, (C) 0-5
0% by weight, preferably 0-30% by weight and (D) 1-3
It is blended in a proportion of 0% by weight, preferably 3 to 20% by weight. And (A), (B) consisting of the above blending ratio,
By adding 0.01 to 5 parts by weight, preferably 0.1 to 2.0 parts by weight of a phosphite antioxidant as the component (E) to 100 parts by weight of (C) and (D). The polycarbonate resin composition of the present invention can be obtained. If the addition rate of the phosphite-based antioxidant is less than 0.01 part by weight, the effect of addition will not be exhibited, and if it exceeds 5 parts by weight, the effect of addition will be leveled and it will not be added beyond this.

The polycarbonate resin composition of the present invention is
It comprises the above-mentioned components (A), (B), (C), (D) and (E), but if necessary, various additives, other synthetic resins, elastomers and the like can be used for the purpose of the present invention. It can also be blended within a range that does not hinder. For example, various additives include antioxidants such as hindered phenol-based, phosphite ester-based, phosphoric acid ester-based, and amine-based antioxidants, ultraviolet absorbers such as benzotriazole-based and benzophenone-based antioxidants, and hindered amine-based light absorbers. 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.
Then, in various moldings using the polycarbonate resin composition of the present invention, the mixing and kneading of the above-mentioned components are generally used, for example, 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 or the like can be used. The heating temperature during kneading is usually 25
It is selected in the range of 0 to 300 ° C. The polycarbonate resin composition thus obtained is subjected to various known molding methods such as injection molding, blow molding, extrusion molding, compression molding, calender molding, rotational molding, etc. It is possible to manufacture molded products in the field and molded products such as housing materials in the field of home appliances and OA.

[0029]

EXAMPLES Next, the present invention will be described in more detail with reference to Examples and Comparative Examples. The components used are as follows. (A) Polycarbonate resin: Tufflon A3000 [manufactured by Idemitsu Petrochemical Co., Ltd., viscosity average molecular weight 29000] (B-1) Polyethylene terephthalate: Diamondite MA523X [manufactured by Mitsubishi Rayon Co., Ltd.] (B-2) Polybutylene terephthalate : Toughpet N1000 (manufactured by Mitsubishi Rayon Co., Ltd.) (C) Rubber-like elastic polymer: Paraloid KM330
(Manufactured by Rohm & Haas) (D-1) Talc: FFR [manufactured by Asada Flour Milling Co., Ltd., average particle size 0.8 μm] (D-2) Mica: M325 [manufactured by Repco, average particle size 18]
μm] (E) (a) bis (2,6-di-t-butyl-4-methylphenyl) pentaerythritol diphosphite (E) (b) octadecyl 3- (3,5-di-t-butyl- 4-Hydroxyphenyl) propionate As the performance evaluation, the processing stability defined below was checked. Processing stability A resin composition prepared according to each compounding composition is melt-kneaded at a cylinder temperature of 270 ° C. by a single screw extruder with a 50φ vent to prepare pellets. The pellets thus obtained were retained in a capillary rheometer at 300 ° C. for 10 minutes, and then the appearance of the extruded strand was visually observed. Judgment ◯: No yellowing or rough skin ×: Yellowing or rough skin Also, the tensile strength and the flexural modulus were measured using injection-molded test pieces. Tensile strength (kg / cm ² ) ... JIS K-71
13 Flexural modulus (kg / cm ² ) ... JIS K-72
In accordance with the composition of Table 1, the amount of (A) and (B-1) is 12
After drying at 0 ° C. for 4 hours, a dry blend of (D-1) and (E) (a) was melt-kneaded at a cylinder temperature of 270 ° C. with a single screw extruder with a 50φ vent to obtain pellets. Place the resulting pellet in a capillary rheometer.
After staying at 00 ° C. for 10 minutes, the appearance of the extruded strand was visually observed, and no yellowing or roughening of the strand skin was observed. Comparative Example 1 Pellets were obtained in the same manner as in Example 1 except that (E) (b) was used as the antioxidant. When the obtained pellets were observed in the same manner as in Example 1, yellowing and deterioration of strand skin (surface roughening) were remarkable.

Example 2 and Comparative Examples 2 and 3 According to the blending composition shown in Table 1, the same operation as in Example 1 was carried out and the evaluation was made. In the examples, yellowing and strand skin roughness were not observed. On the other hand, in the comparative example, yellowing and deterioration of the skin were remarkable and the deterioration was remarkable. Example 3 and Comparative Example 4 According to the blending composition shown in Table 1, the same procedure as in Example 1 was carried out and evaluated. In the examples, yellowing and strand skin roughness were not observed. On the other hand, in the comparative example, yellowing and deterioration of the skin were remarkable and the deterioration was remarkable.

[0031]

[Table 1]

Example 4 and Comparative Example 5 According to the blending composition shown in Table 2, the aromatic polyester resin was (B-2) and the capillary rheometer was 280 ° C.
The evaluation was carried out in the same manner as in Example 1 except that the sample was retained for 10 minutes. In Examples, neither yellowing nor deterioration of strand skin was observed. On the other hand, in the comparative example, yellowing and deterioration of the skin were remarkable and the deterioration was remarkable.

[0033]

[Table 2]

Example 5 and Comparative Example 6 According to the blending composition shown in Table 3, the same operation as in Example 1 was carried out and the evaluation was made. In the examples, yellowing and strand skin roughness were not observed. On the other hand, in the comparative example, yellowing and deterioration of the skin were remarkable and the deterioration was remarkable. Example 6 and Comparative Example 7 According to the blending composition shown in Table 3, the same operation as in Example 1 was carried out and the evaluation was made. In the examples, yellowing and strand skin roughness were not observed. On the other hand, in the comparative example, yellowing and deterioration of the skin were remarkable and the deterioration was remarkable.

[0035]

[Table 3]

[0036]

As described above, according to the present invention, it is understood that the present invention is a polycarbonate resin composition capable of obtaining a molded article having a good appearance while having the original mechanical properties of polycarbonate. Therefore, the polycarbonate resin composition of the present invention can be effectively used as a material for various molded products that are widely used in interior / exterior materials in the field of automobiles or housing materials in the field of electric / electronic devices.

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Claims (1)

[Claims] 1. A polycarbonate resin composition comprising (A) a polycarbonate resin, (B) an aromatic polyester resin, (C) a rubber-like elastic material, (D) an inorganic filler, and (E) a phosphite antioxidant. And (A) polycarbonate resin 30 to 89% by weight, (B) aromatic polyester resin 10 to 50% by weight, (C) rubber-like elastic body 0 to 5
0% by weight and 1 to 30% by weight of (D) inorganic filler, and a total of 10 of (A), (B), (C) and (D)
A polycarbonate resin composition, wherein (E) is 0.01 to 5 parts by weight with respect to 0 parts by weight.