JP2013133362A - Aromatic polycarbonate resin composition and molded article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polycarbonate resin composition excellent in appearance, chemical resistance, impact resistance, hardness and self-tapping property.SOLUTION: There is disclosed an aromatic polycarbonate resin composition which includes, based on 100 pts.mass of an aromatic polycarbonate resin (A): 5 to 200 pts.mass of a resin (B) comprising (a) an alkyl(meth)acrylate monomer unit, (b) a vinyl cyanide monomer unit, (c) a conjugated diene monomer unit and (d) an aromatic vinyl monomer unit; 5 to 100 pts.mass of a polymethylmethacrylate (co)polymer (C) having pencil hardness of F or higher; and 5 to 60 pts.mass of a polyester resin (D).

Description

  The present invention relates to an aromatic polycarbonate resin composition and a molded article, and more particularly, to an aromatic polycarbonate resin composition excellent in appearance and excellent in chemical resistance, impact resistance and hardness, and a molded article comprising the same.

Conventionally, aromatic polycarbonate resin is excellent in transparency, impact resistance, heat resistance, etc., and the resulting molded product is also excellent in dimensional stability, etc. Widely used as automotive interior parts.
However, the molded product of the aromatic polycarbonate resin alone has a lower surface hardness than products made of metal or glass, so it is inferior in scratch resistance, and if it is wiped with cloth or handled roughly, For example, it has a drawback that it is easily scratched, and is particularly problematic in applications where a high-class feeling is required, such as housings for home appliances and portable terminal devices and automobile interior parts.

  On the other hand, a method for forming a coating film with high surface hardness on the surface of a product using an aromatic polycarbonate resin has been proposed, and as a film material, for example, a coating agent of silicone resin or acrylic resin is known. However, these have a problem in the adhesion of the coating film, and it is difficult to coat a product having a complicated shape, the price is expensive, and there is a limit to industrial use. In addition, a method of painting the product surface is also known, but this method, like coating, is difficult to obtain a uniform coating film depending on the product shape. If the coating film thickness is not thick, the effect of improving the surface hardness is low. Furthermore, there exists a fault which impairs an external appearance by peeling of a coating surface or a coating-film surface.

  A method of blending a polycarbonate resin with an inorganic compound having a high hardness is also known, but there is a concern that the addition of the inorganic compound may cause a decrease in the molecular weight of the polycarbonate resin and cause poor appearance due to poor dispersion or surface precipitation.

  On the other hand, in order to obtain an aromatic polycarbonate resin having excellent transparency and rigidity, a method of adding a compound selected from the group of biphenyl compounds, terphenyl compounds and polycaprolactones to aromatic polycarbonate resins has been proposed (for example, patents). References 1-3). However, according to the results of the study by the present inventors, it is difficult to satisfy the requirement for high scratch resistance, and this method is still insufficient for use in the above products.

In addition, many scratch-resistant compositions in which an aromatic polycarbonate resin is mixed with an acrylate such as methyl methacrylate or an ABS resin have been proposed.
For example, Patent Document 4 describes blending a vinyl cyanide compound-aromatic vinyl compound copolymer and a methyl methacrylate resin. Patent Document 5 describes a resin composition comprising a polyester resin and an ABS resin, a polycarbonate resin, and a polymethyl methacrylate resin. Furthermore, Patent Document 6 describes blending a copolymer composed of a vinyl monomer that is reactive with (meth) alkyl acrylate-aromatic vinyl-polycarbonate resin.

  However, these resin compositions are not satisfactory in appearance of molded products, and are not excellent resin compositions in terms of chemical resistance, hardness and impact resistance.

Japanese Patent Laid-Open No. 03-143950 Japanese Patent Laid-Open No. 05-257002 JP 2000-169695 A JP 2001-49072 A JP 2001-234040 A JP 2008-56798 A

  An object of the present invention is to provide an aromatic polycarbonate resin composition excellent in appearance, chemical resistance, impact resistance, hardness, and self-tapping property, and a molded product thereof in view of the above-mentioned problems of the prior art. There is.

As a result of intensive studies to achieve the above-mentioned problems, the present inventor has (a) an alkyl (meth) acrylate monomer unit, (b) a vinyl cyanide monomer unit, (c) a conjugated diene. A resin comprising a monomer unit and (d) an aromatic vinyl monomer unit, a polymethyl methacrylate (co) polymer having a specific hardness, and a polyester resin, respectively, to an aromatic polycarbonate resin It has been found that when a specific amount is blended, an aromatic polycarbonate resin composition excellent in appearance and excellent in chemical resistance, impact resistance, hardness and self-tapping property can be obtained, and the present invention has been completed.
According to the present invention, the following aromatic polycarbonate resin composition and molded article are provided.

[1] For 100 parts by mass of the aromatic polycarbonate resin (A), (a) an alkyl (meth) acrylate monomer unit, (b) a vinyl cyanide monomer unit, (c) a conjugated diene monomer 5 to 200 parts by mass of a resin (B) comprising a body unit and (d) an aromatic vinyl monomer unit, and 5 to 100 polymethyl methacrylate (co) polymer (C) having a pencil hardness higher than F. An aromatic polycarbonate resin composition comprising 5 parts by mass and 5 to 60 parts by mass of a polyester resin (D).
[2] The aromatic polycarbonate resin composition according to the above [1], wherein the content of the polymethyl methacrylate (co) polymer (C) is the same as or higher than the content of the resin (B).
[3] The aromatic polycarbonate resin composition according to the above [1] or [2], wherein the resin (B) is a resin comprising an alkyl methacrylate, butadiene, acrylonitrile and a styrene unit.
[4] The aromatic polycarbonate resin composition according to any one of [1] to [3], wherein the polyester resin (B) is polybutylene terephthalate.
[5] Any of [1] to [4] above, further comprising 2 to 40 parts by mass of the core / shell type graft copolymer elastomer (E) with respect to 100 parts by mass of the aromatic polycarbonate resin (A). The aromatic polycarbonate resin composition described in 1.
[6] A molded product obtained from the resin composition according to any one of [1] to [5].
[7] The molded product according to [6], wherein the molded product is a casing for a portable terminal or a car navigation system.
[8] The molded product according to the above [6], wherein the molded product is an automotive interior instrument panel part or a console box part.

  According to the aromatic polycarbonate resin composition of the present invention, a molded product comprising the same, and a method for producing the same, an aromatic polycarbonate resin composition having excellent appearance, chemical resistance, impact resistance, hardness, and self-tapping properties And a molded product comprising the same can be obtained.

Hereinafter, the contents of the present invention will be described in detail. The description of the constituent elements described below may be made based on typical embodiments and specific examples of the present invention, but the present invention is interpreted to be limited to such embodiments and specific examples. is not.
In addition, in the present specification, “to” is used in the sense of including numerical values described before and after it as a lower limit value and an upper limit value.

[1. Overview]
The aromatic polycarbonate resin composition of the present invention is based on 100 parts by mass of the aromatic polycarbonate resin (A), (a) an alkyl (meth) acrylate monomer unit, (b) a vinyl cyanide monomer unit, (C) 5 to 200 parts by mass of a resin (B) comprising a conjugated diene monomer unit and (d) an aromatic vinyl monomer unit, and a polymethyl methacrylate (co) heavy having a pencil hardness higher than F 5-100 mass parts of unification | combination (C) and 5-60 mass parts of polyester resins (D) are contained, It is characterized by the above-mentioned.

[2. Aromatic polycarbonate resin (A)]
The type of the aromatic polycarbonate resin used in the aromatic polycarbonate resin composition of the present invention is not limited, and only one type may be used, and two or more types are used in any combination and in any ratio. May be.
The aromatic polycarbonate resin is a polymer having a basic structure having a carbonic acid bond represented by a general formula — (— O—X ¹ —O—C (═O) —) —. In the formula, X ¹ is generally a hydrocarbon, but for imparting various properties, X ¹ into which a hetero atom or a hetero bond is introduced may be used.
The aromatic polycarbonate resin refers to a polycarbonate resin in which carbons directly bonded to carbonic acid bonds are aromatic carbons. Aromatic polycarbonate is excellent from the viewpoints of heat resistance, mechanical properties, electrical characteristics, etc., among various polycarbonates.

  Although there is no restriction | limiting in the specific kind of aromatic polycarbonate resin, For example, the aromatic polycarbonate polymer formed by making a dihydroxy compound and a carbonate precursor react is mentioned. At this time, in addition to the dihydroxy compound and the carbonate precursor, a polyhydroxy compound or the like may be reacted. Alternatively, a method of reacting carbon dioxide with a cyclic ether using a carbonate precursor may be used. The aromatic polycarbonate polymer may be linear or branched. Furthermore, the aromatic polycarbonate polymer may be a homopolymer composed of one type of repeating unit, or may be a copolymer having two or more types of repeating units. At this time, the copolymer can be selected from various copolymerization forms such as a random copolymer and a block copolymer. Normally, such an aromatic polycarbonate polymer is a thermoplastic resin.

  Examples of the aromatic dihydroxy compound among the monomers used as the raw material for the aromatic polycarbonate resin are as follows.

Dihydroxybenzenes such as 1,2-dihydroxybenzene, 1,3-dihydroxybenzene (ie, resorcinol), 1,4-dihydroxybenzene;
Dihydroxybiphenyls such as 2,5-dihydroxybiphenyl, 2,2′-dihydroxybiphenyl, 4,4′-dihydroxybiphenyl;

2,2′-dihydroxy-1,1′-binaphthyl, 1,2-dihydroxynaphthalene, 1,3-dihydroxynaphthalene, 2,3-dihydroxynaphthalene, 1,6-dihydroxynaphthalene, 2,6-dihydroxynaphthalene, , 7-dihydroxynaphthalene, dihydroxynaphthalene such as 2,7-dihydroxynaphthalene;

2,2′-dihydroxydiphenyl ether, 3,3′-dihydroxydiphenyl ether, 4,4′-dihydroxydiphenyl ether, 4,4′-dihydroxy-3,3′-dimethyldiphenyl ether, 1,4-bis (3-hydroxyphenoxy) Dihydroxy diaryl ethers such as benzene and 1,3-bis (4-hydroxyphenoxy) benzene;

2,2-bis (4-hydroxyphenyl) propane (ie, bisphenol A),
1,1-bis (4-hydroxyphenyl) propane,
2,2-bis (3-methyl-4-hydroxyphenyl) propane,
2,2-bis (3-methoxy-4-hydroxyphenyl) propane,
2- (4-hydroxyphenyl) -2- (3-methoxy-4-hydroxyphenyl) propane,
1,1-bis (3-tert-butyl-4-hydroxyphenyl) propane,
2,2-bis (4-hydroxy-3,5-dimethylphenyl) propane,
2,2-bis (3-cyclohexyl-4-hydroxyphenyl) propane,
2- (4-hydroxyphenyl) -2- (3-cyclohexyl-4-hydroxyphenyl) propane,
α, α′-bis (4-hydroxyphenyl) -1,4-diisopropylbenzene,
1,3-bis [2- (4-hydroxyphenyl) -2-propyl] benzene,
Bis (4-hydroxyphenyl) methane,
Bis (4-hydroxyphenyl) cyclohexylmethane,
Bis (4-hydroxyphenyl) phenylmethane,
Bis (4-hydroxyphenyl) (4-propenylphenyl) methane,
Bis (4-hydroxyphenyl) diphenylmethane,
Bis (4-hydroxyphenyl) naphthylmethane,
1,1-bis (4-hydroxyphenyl) ethane,
1,2-bis (4-hydroxyphenyl) ethane,
1,1-bis (4-hydroxyphenyl) -1-phenylethane,
1,1-bis (4-hydroxyphenyl) -1-naphthylethane,
1,1-bis (4-hydroxyphenyl) butane,
2,2-bis (4-hydroxyphenyl) butane,
2,2-bis (4-hydroxyphenyl) pentane,
1,1-bis (4-hydroxyphenyl) hexane,
2,2-bis (4-hydroxyphenyl) hexane,
1,1-bis (4-hydroxyphenyl) octane,
2,2-bis (4-hydroxyphenyl) octane,
4,4-bis (4-hydroxyphenyl) heptane,
2,2-bis (4-hydroxyphenyl) nonane,
1,10-bis (4-hydroxyphenyl) decane,
1,1-bis (4-hydroxyphenyl) dodecane,
Bis (hydroxyaryl) alkanes such as;

1,1-bis (4-hydroxyphenyl) cyclopentane,
1,1-bis (4-hydroxyphenyl) cyclohexane,
1,4-bis (4-hydroxyphenyl) cyclohexane,
1,1-bis (4-hydroxyphenyl) -3,3-dimethylcyclohexane,
1,1-bis (4-hydroxyphenyl) -3,4-dimethylcyclohexane,
1,1-bis (4-hydroxyphenyl) -3,5-dimethylcyclohexane,
1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane,
1,1-bis (4-hydroxy-3,5-dimethylphenyl) -3,3,5-trimethylcyclohexane,
1,1-bis (4-hydroxyphenyl) -3-propyl-5-methylcyclohexane, 1,1-bis (4-hydroxyphenyl) -3-tert-butyl-cyclohexane,
1,1-bis (4-hydroxyphenyl) -3-tert-butyl-cyclohexane,
1,1-bis (4-hydroxyphenyl) -3-phenylcyclohexane,
1,1-bis (4-hydroxyphenyl) -4-phenylcyclohexane,
Bis (hydroxyaryl) cycloalkanes such as;

Cardostructure-containing bisphenols such as 9,9-bis (4-hydroxyphenyl) fluorene, 9,9-bis (4-hydroxy-3-methylphenyl) fluorene;
Dihydroxy diaryl sulfides such as 4,4′-dihydroxydiphenyl sulfide, 4,4′-dihydroxy-3,3′-dimethyldiphenyl sulfide;
Dihydroxydiaryl sulfoxides such as 4,4′-dihydroxydiphenyl sulfoxide, 4,4′-dihydroxy-3,3′-dimethyldiphenyl sulfoxide;
And dihydroxydiaryl sulfones such as 4,4′-dihydroxydiphenyl sulfone and 4,4′-dihydroxy-3,3′-dimethyldiphenyl sulfone;

Of these, bis (hydroxyaryl) alkanes are preferable, and bis (4-hydroxyphenyl) alkanes are preferable, and 2,2-bis (4-hydroxyphenyl) propane is particularly preferable in terms of impact resistance and heat resistance. (Ie bisphenol A) is preferred.
In addition, 1 type may be used for an aromatic dihydroxy compound and it may use 2 or more types together by arbitrary combinations and a ratio.

Among the monomers used as the raw material for the aromatic polycarbonate resin, carbonyl halides, carbonate esters and the like are used as examples of the carbonate precursor. In addition, 1 type may be used for a carbonate precursor and it may use 2 or more types together by arbitrary combinations and a ratio.
Specific examples of carbonyl halides include phosgene; haloformates such as bischloroformate of dihydroxy compounds and monochloroformate of dihydroxy compounds.
Specific examples of the carbonate ester include diaryl carbonates such as diphenyl carbonate and ditolyl carbonate; dialkyl carbonates such as dimethyl carbonate and diethyl carbonate; biscarbonate bodies of dihydroxy compounds, monocarbonate bodies of dihydroxy compounds, and cyclic carbonates. And carbonate bodies of dihydroxy compounds such as

-Manufacturing method of aromatic polycarbonate resin The manufacturing method of aromatic polycarbonate resin is not specifically limited, Arbitrary methods are employable. Examples thereof include an interfacial polymerization method, a melt transesterification method, a pyridine method, a ring-opening polymerization method of a cyclic carbonate compound, and a solid phase transesterification method of a prepolymer. Hereinafter, a particularly preferable one of these methods will be specifically described.

.. Interfacial polymerization method First, the case of producing an aromatic polycarbonate resin by the interfacial polymerization method will be described. In the interfacial polymerization method, a dihydroxy compound and a carbonate precursor (preferably phosgene) are reacted in the presence of an organic solvent inert to the reaction and an aqueous alkaline solution, usually at a pH of 9 or higher. An aromatic polycarbonate resin is obtained by interfacial polymerization in the presence. In the reaction system, a molecular weight adjusting agent (terminal terminator) may be present as necessary, or an antioxidant may be present to prevent the oxidation of the dihydroxy compound.
The dihydroxy compound and the carbonate precursor are as described above. Of the carbonate precursors, phosgene is preferably used, and the method using phosgene is particularly called a phosgene method.

  Examples of the organic solvent inert to the reaction include chlorinated hydrocarbons such as dichloromethane, 1,2-dichloroethane, chloroform, monochlorobenzene and dichlorobenzene; aromatic hydrocarbons such as benzene, toluene and xylene; It is done. In addition, 1 type may be used for an organic solvent and it may use 2 or more types together by arbitrary combinations and a ratio.

Examples of the alkali compound contained in the alkaline aqueous solution include alkali metal compounds and alkaline earth metal compounds such as sodium hydroxide, potassium hydroxide, lithium hydroxide, and sodium hydrogen carbonate. Among them, sodium hydroxide and Potassium hydroxide is preferred. In addition, an alkali compound may use 1 type and may use 2 or more types together by arbitrary combinations and a ratio.
Although there is no restriction | limiting in the density | concentration of the alkali compound in alkaline aqueous solution, Usually, in order to control pH in the alkaline aqueous solution of reaction to 10-12, it is used at 5-10 mass%. For example, when phosgene is blown, the molar ratio of the bisphenol compound and the alkali compound is usually 1: 1.9 or more in order to control the pH of the aqueous phase to be 10 to 12, preferably 10 to 11. In particular, it is preferably set to 1: 2.0 or more, usually 1: 3.2 or less, and more preferably 1: 2.5 or less.

  Examples of the polymerization catalyst include aliphatic tertiary amines such as trimethylamine, triethylamine, tributylamine, tripropylamine, and trihexylamine; alicyclic rings such as N, N′-dimethylcyclohexylamine and N, N′-diethylcyclohexylamine. Formula tertiary amines; aromatic tertiary amines such as N, N′-dimethylaniline and N, N′-diethylaniline; quaternary ammonium salts such as trimethylbenzylammonium chloride, tetramethylammonium chloride, triethylbenzylammonium chloride, etc. Pyridine; guanine; guanidine salt; and the like. In addition, 1 type may be used for a polymerization catalyst and it may use 2 or more types together by arbitrary combinations and a ratio.

Examples of the molecular weight regulator include aromatic phenols having a monovalent phenolic hydroxyl group; aliphatic alcohols such as methanol and butanol; mercaptans; phthalimides, and the like. Among them, aromatic phenols are preferable. Specific examples of such aromatic phenols include alkyl groups such as m-methylphenol, p-methylphenol, m-propylphenol, p-propylphenol, p-tert-butylphenol, and p-long chain alkyl-substituted phenol. Examples thereof include substituted phenols; vinyl group-containing phenols such as isopropanyl phenol; epoxy group-containing phenols; carboxyl group-containing phenols such as o-oxinebenzoic acid and 2-methyl-6-hydroxyphenylacetic acid; In addition, a molecular weight regulator may use 1 type and may use 2 or more types together by arbitrary combinations and a ratio.
The usage-amount of a molecular weight regulator is 0.5 mol or more normally with respect to 100 mol of dihydroxy compounds, Preferably it is 1 mol or more, and is 50 mol or less normally, Preferably it is 30 mol or less. By making the usage-amount of a molecular weight modifier into this range, the thermal stability and hydrolysis resistance of an aromatic polycarbonate resin composition can be improved.

In the reaction, the order of mixing the reaction substrate, reaction medium, catalyst, additive and the like is arbitrary as long as the desired aromatic polycarbonate resin is obtained, and an appropriate order may be set arbitrarily. For example, when phosgene is used as the carbonate precursor, the molecular weight regulator can be mixed at any time as long as it is between the reaction (phosgenation) of the dihydroxy compound and phosgene and the start of the polymerization reaction.
In addition, reaction temperature is 0-40 degreeC normally, and reaction time is normally several minutes (for example, 10 minutes)-several hours (for example, 6 hours).

-Melt transesterification method Next, the case where an aromatic polycarbonate resin is manufactured by the melt transesterification method is demonstrated. In the melt transesterification method, for example, a transesterification reaction between a carbonic acid diester and a dihydroxy compound is performed.

The dihydroxy compound is as described above.
On the other hand, examples of the carbonic acid diester include dialkyl carbonate compounds such as dimethyl carbonate, diethyl carbonate, and di-tert-butyl carbonate; diphenyl carbonate; substituted diphenyl carbonate such as ditolyl carbonate, and the like. Of these, diphenyl carbonate and substituted diphenyl carbonate are preferable, and diphenyl carbonate is particularly preferable. In addition, 1 type may be used for carbonic acid diester, and it may use 2 or more types together by arbitrary combinations and a ratio.

  The ratio of the dihydroxy compound and the carbonic acid diester is arbitrary as long as the desired aromatic polycarbonate resin can be obtained, but it is preferable to use an equimolar amount or more of the carbonic acid diester with respect to 1 mol of the dihydroxy compound. It is more preferable to use the above. The upper limit is usually 1.30 mol or less. By setting it as such a range, the amount of terminal hydroxyl groups can be adjusted to a suitable range.

  In the aromatic polycarbonate resin, the amount of terminal hydroxyl groups tends to have a great influence on thermal stability, hydrolysis stability, color tone, and the like. For this reason, you may adjust the amount of terminal hydroxyl groups as needed by a well-known arbitrary method. In the transesterification reaction, an aromatic polycarbonate resin in which the terminal hydroxyl group amount is adjusted can be usually obtained by adjusting the mixing ratio of the carbonic acid diester and the aromatic dihydroxy compound, the degree of pressure reduction during the transesterification reaction, and the like. In addition, the molecular weight of the aromatic polycarbonate resin obtained can also be adjusted by this operation.

When adjusting the amount of terminal hydroxyl groups by adjusting the mixing ratio of the carbonic acid diester and the dihydroxy compound, the mixing ratio is as described above.
Further, as a more aggressive adjustment method, there may be mentioned a method in which a terminal terminator is mixed separately during the reaction. Examples of the terminal terminator at this time include monohydric phenols, monovalent carboxylic acids, carbonic acid diesters, and the like. In addition, 1 type may be used for a terminal terminator and it may use 2 or more types together by arbitrary combinations and a ratio.

  When producing an aromatic polycarbonate resin by the melt transesterification method, a transesterification catalyst is usually used. Any transesterification catalyst can be used. Among them, it is preferable to use, for example, an alkali metal compound and / or an alkaline earth metal compound. In addition, auxiliary compounds such as basic boron compounds, basic phosphorus compounds, basic ammonium compounds, and amine compounds may be used in combination. In addition, 1 type may be used for a transesterification catalyst and it may use 2 or more types together by arbitrary combinations and a ratio.

In the melt transesterification method, the reaction temperature is usually 100 to 320 ° C. The pressure during the reaction is usually a reduced pressure condition of 2 mmHg or less. As a specific operation, a melt polycondensation reaction may be performed under the above-mentioned conditions while removing a by-product such as an aromatic hydroxy compound.
The melt polycondensation reaction can be performed by either a batch method or a continuous method. When performing by a batch type, the order which mixes a reaction substrate, a reaction medium, a catalyst, an additive, etc. is arbitrary as long as a desired aromatic polycarbonate resin is obtained, What is necessary is just to set an appropriate order arbitrarily. However, in consideration of the stability of the aromatic polycarbonate resin and the aromatic polycarbonate resin composition, the melt polycondensation reaction is preferably carried out continuously.

In the melt transesterification method, a catalyst deactivator may be used as necessary. As the catalyst deactivator, a compound that neutralizes the transesterification catalyst can be arbitrarily used. Examples thereof include sulfur-containing acidic compounds and derivatives thereof. In addition, a catalyst deactivator may use 1 type and may use 2 or more types together by arbitrary combinations and a ratio.
The amount of the catalyst deactivator used is usually 0.5 equivalents or more, preferably 1 equivalent or more, and usually 10 equivalents or less, relative to the alkali metal or alkaline earth metal contained in the transesterification catalyst. Preferably it is 5 equivalents or less. Furthermore, it is 1 ppm or more normally with respect to aromatic polycarbonate resin, and is 100 ppm or less normally, Preferably it is 20 ppm or less.

  The molecular weight of the aromatic polycarbonate resin (A) used in the present invention is arbitrary and may be appropriately selected and determined. However, the viscosity average molecular weight [Mv] is preferably 10,000 to 40,000. When the viscosity average molecular weight is less than 10,000, the mechanical strength tends to be insufficient, and when the viscosity average molecular weight exceeds 40,000, the fluidity is poor and the moldability tends to be deteriorated. The viscosity average molecular weight is more preferably 16,000 to 40,000, still more preferably 18,000 to 30,000. The molecular weight can be adjusted to such a range by a known method such as controlling the amount of the molecular weight regulator as described later.

Here, the viscosity average molecular weight [Mv] is obtained by using methylene chloride as a solvent and obtaining an intrinsic viscosity [η] (unit dl / g) at a temperature of 20 ° C. using an Ubbelohde viscometer, Schnell's viscosity formula, That is, it means a value calculated from η = 1.23 × 10 ⁻⁴ Mv ^0.83 . The intrinsic viscosity [η] is a value calculated from the following equation by measuring the specific viscosity [ηsp] at each solution concentration [C] (g / dl).

Other matters regarding aromatic polycarbonate resin The terminal hydroxyl group concentration of the aromatic polycarbonate resin is arbitrary and may be appropriately selected and determined, but is usually 1,000 ppm or less, preferably 800 ppm or less, more preferably 600 ppm or less. . Thereby, the residence heat stability and color tone of the aromatic polycarbonate resin composition of the present invention can be further improved. The lower limit is usually 10 ppm or more, preferably 30 ppm or more, and more preferably 40 ppm or more, particularly in the case of an aromatic polycarbonate resin produced by the melt transesterification method. Thereby, the fall of molecular weight can be suppressed and the mechanical characteristic of the aromatic polycarbonate resin composition of this invention can be improved more.
The unit of the terminal hydroxyl group concentration is the weight of the terminal hydroxyl group expressed in ppm relative to the weight of the aromatic polycarbonate resin. The measuring method is performed by colorimetric determination (method described in Macromol. Chem. 88 215 (1965)) by a titanium tetrachloride / acetic acid method.

  In addition, aromatic polycarbonate resin (A) is not limited to the aspect containing only 1 type of aromatic polycarbonate resin, 2 or more types of aromatic polycarbonate resin from which a monomer composition, molecular weight, terminal hydroxyl group concentration, etc. differ is mixed. May be used. Moreover, you may use combining as an alloy (mixture) which mixed another thermoplastic resin with aromatic polycarbonate resin.

  Further, for example, for the purpose of further improving flame retardancy and impact resistance, an aromatic polycarbonate resin is a copolymer with an oligomer or polymer having a siloxane structure; for the purpose of further improving thermal oxidation stability and flame retardancy. Copolymer with monomer, oligomer or polymer having phosphorus atom; copolymer with monomer, oligomer or polymer having dihydroxyanthraquinone structure for the purpose of improving thermal oxidation stability; polystyrene to improve optical properties A copolymer with an oligomer or polymer having an olefinic structure such as; a copolymer with a polyester resin oligomer or polymer for the purpose of improving chemical resistance; May be.

  Further, in order to improve the appearance of the molded product and improve the fluidity, the polycarbonate resin may contain a polycarbonate oligomer. The viscosity average molecular weight [Mv] of this polycarbonate oligomer is usually 1,500 or more, preferably 2,000 or more, and usually 9,500 or less, preferably 9,000 or less. Furthermore, the polycarbonate ligomer contained is preferably 30% by mass or less of the polycarbonate resin (including the polycarbonate oligomer).

Further, the polycarbonate resin may be not only a virgin raw material but also a polycarbonate resin regenerated from a used product (so-called material-recycled polycarbonate resin). Examples of the used products include: optical recording media such as optical disks; light guide plates; vehicle window glass, vehicle headlamp lenses, windshields and other vehicle transparent members; water bottles and other containers; eyeglass lenses; Examples include architectural members such as glass windows and corrugated sheets. Also, non-conforming products, pulverized products obtained from sprues, runners, etc., or pellets obtained by melting them can be used.
However, the regenerated polycarbonate resin is preferably 80% by mass or less, more preferably 50% by mass or less, among the polycarbonate resins contained in the polycarbonate resin composition of the present invention. Recycled polycarbonate resin is likely to have undergone deterioration such as heat deterioration and aging deterioration, so when such polycarbonate resin is used more than the above range, hue and mechanical properties can be reduced. It is because there is sex.

[3. Resin (B)]
The aromatic polycarbonate resin composition of the present invention comprises (a) an alkyl (meth) acrylate monomer unit, (b) a vinyl cyanide monomer unit, (c) a conjugated diene monomer unit, and (d ) A resin (B) composed of an aromatic vinyl monomer unit (hereinafter sometimes referred to as a resin (B)) is contained in an amount of 5 to 200 parts by mass with respect to 100 parts by mass of the aromatic polycarbonate resin (A). To do.

The alkyl (meth) acrylate monomer for the (a) alkyl (meth) acrylate monomer unit in the resin (B) includes methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, amyl Alkyl methacrylates such as methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, octyl methacrylate, dodecyl methacrylate, octadecyl methacrylate, lauryl methacrylate, stearyl methacrylate, glycidyl methacrylate; methyl acrylate, ethyl acrylate, Propyl acrylate, butyl acrylate, amyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, octyl acrylate And alkyl acrylates such as dodecyl acrylate, octadecyl acrylate, lauryl acrylate, stearyl acrylate and glycidyl acrylate, and cyclic alkyl (meth) acrylates such as cyclohexyl acrylate and cyclohexyl methacrylate, preferably alkyl (meth) acrylates. The alcohol residue has preferably 1 to 12 carbon atoms, more preferably 1 to 8 carbon atoms, and particularly preferably methyl methacrylate.
These monomers can be used alone or in combination of two or more.

Examples of the vinyl cyanide monomer for the vinyl cyanide monomer unit (b) in the resin (B) include acrylonitrile and methacrylonitrile, and acrylonitrile is preferred.
Further, examples of the conjugated diene monomer for the (c) conjugated diene monomer unit include butadiene and isoprene, and butadiene is preferable.
These monomers can be used alone or in combination of two or more.

  Furthermore, (d) the aromatic vinyl monomer for the aromatic vinyl monomer unit in the resin (B) includes styrene, α-methylstyrene, vinyltoluene, o-ethylstyrene, and o, p-. Examples thereof include dichlorostyrene, and styrene and α-methylstyrene, particularly styrene are preferable from the viewpoint of rigidity and impact resistance. These monomers can be used not only alone but also in combination of two or more.

(A) alkyl (meth) acrylate monomer unit in resin (B), (b) vinyl cyanide monomer unit, (c) conjugated diene monomer unit, (d) aromatic vinyl monomer As the ratio of the monomer units, the total of these monomer units (a) to (d) is 100 parts by mass, and (a) the alkyl (meth) acrylate monomer unit is 10 to 65 parts by mass, (b 1) to 45 parts by mass of vinyl cyanide monomer units, 5 to 25 parts by mass of conjugated diene monomer units, and 15 to 65 parts by mass of (d) aromatic vinyl monomer units. It is preferable that Outside this range, the appearance of the aromatic polycarbonate resin (A) and the polymethyl methacrylate-based (co) polymer (C) described later are inferior, resulting in a loss of appearance, fluidity and impact resistance, and pencil hardness. There is a tendency to be unbalanced.
A more preferable ratio of (a) to (d) is (a) an alkyl (meth) acrylate monomer unit of 10 to 30 parts by mass, particularly 10 to 20 parts by mass, and (b) a vinyl cyanide monomer. The body unit is 10 to 40 parts by mass, particularly 15 to 35 parts by mass, (c) the conjugated diene monomer unit is 5 to 20 parts by mass, particularly 5 to 15 parts by mass, and (d) the aromatic vinyl type unit. The mass unit is 30 to 60 parts by mass, particularly 35 to 55 parts by mass.

The resin (B) may contain other copolymerizable monomer units other than the above monomer units (a) to (d). Examples of such other monomers include α- or maleimide, N-methylmaleimide, N-butylmaleimide, N- (p-methylphenyl) maleimide, N-phenylmaleimide, and N-cyclohexylmaleimide. Examples include β-unsaturated dicarboxylic acid imide compounds, unsaturated carboxylic acid amides such as acrylamide and methacrylamide, bifunctional monomers such as diallyl phthalate, triallyl cyanurate, and allyl methacrylate. It is not something. These monomers can be used not only alone but also in combination of two or more.
Such other copolymerizable monomer units are usually 20 parts by mass or less, preferably 10 parts by mass or less, particularly 100 parts by mass in total of the above-described monomer units (a) to (d). Is 10 parts by mass or less.

In addition, the resin (B) may be a random copolymer obtained by randomly copolymerizing the monomers (a) to (d) above, or a plurality of the monomers (a) to (d). It may be present in the form of a mixture of a seed copolymer and a copolymer of other monomers (a) to (d), and the monomer units (a) to (d) A copolymer partially in a block shape may be used, and at least one (co) polymer selected from the monomers (a) to (d) is added to the monomers (a) to (d). It may be a graft copolymer in which at least one of the monomers is grafted, or may be a mixture thereof.
Here, a copolymer, a block copolymer, and a graft copolymer are a copolymer, a block copolymer, or a graft copolymer in the meaning generally used in this industry, and are strictly used as a polymer compound. Does not mean a real copolymer, a real block copolymer, or a real graft copolymer in a simple sense, but at least one or more types selected from the monomers (a) to (d) ( Resin compositions in which the (co) polymer is composed of monomer units (a) to (d) formed by polymerization or mixing are also included.

Resin (B) is, as a particularly preferred resin, in the presence of (c) conjugated diene rubber polymer, (a) alkyl (meth) acrylate monomer, (b) vinyl cyanide monomer and (D) a resin component (B1) obtained by polymerizing two or more selected from aromatic vinyl monomers, (di) styrene monomers, (bi) acrylonitrile, and (ai) acrylic Examples thereof include a resin comprising a resin component (B2) comprising an acid ester.
The ratio of the resin component (B1) and the resin component (B2) is 95 to 5% by mass for the component (B1) and 5 to 95 for the component (B2) on the basis of 100% by mass in total of the components (B1) and (B2) Preferably, the component (B1) is 80 to 5% by mass, the component (B2) is 20 to 95% by mass, and further the component (B1) is 60 to 10% by mass, and the component (B2). ) Is preferably 40 to 90 mass.

  (C) In the presence of a conjugated diene rubber polymer, (a) an alkyl (meth) acrylate monomer, (b) a vinyl cyanide monomer, and (d) an aromatic vinyl monomer. The resin component (B1) obtained by polymerizing two or more selected ones can be obtained by a known polymerization method such as an emulsion polymerization method, a suspension polymerization method, a solution polymerization method, a bulk polymerization method and the like.

Moreover, the resin component (B2) which consists of (di) styrene-type monomer, (bi) acrylonitrile, and (ai) acrylate ester, for example, these monomers are used as radical initiators and If necessary, it can be produced by bulk polymerization, emulsion polymerization, solution polymerization or suspension polymerization in the presence of a polymerization degree regulator.
Examples of the radical initiator include potassium persulfate, sodium persulfate, ammonium persulfate and cumene hydroperoxide redox initiators, and any initiator may be used.

In this invention, by using resin (B), it can be set as the aromatic polycarbonate resin composition excellent in the external appearance, and it becomes possible to set it as the resin composition excellent also in impact resistance and hardness. The combination of the polymethyl methacrylate-based (co) polymer (C) and the aromatic polycarbonate resin (A), which will be described later, is likely to cause the appearance of the molded product to become a pearl color, which is likely to cause a poor appearance, but the resin (B) Works as a compatibilizing agent for the polymethylmethacrylate (co) polymer (C) and the aromatic polycarbonate resin (A), thereby making the composition extremely improved in appearance and having excellent hardness and impact resistance. be able to.
Content of resin (B) is 5-200 mass parts with respect to 100 mass parts of polycarbonate resin (A), Preferably it is 5-100 mass parts, Especially it is 5-50 mass parts. When the content is less than 5 parts by mass, the effect of improving the appearance and impact resistance of the polycarbonate resin cannot be sufficiently obtained, and when the use ratio exceeds 200 parts by mass, the hardness of the polycarbonate resin is lowered.

[4. Polymethylmethacrylate (co) polymer (C)]
The aromatic polycarbonate resin composition of the present invention contains 5 to 100 parts by mass of a polymethyl methacrylate (co) polymer (C) having a pencil hardness higher than F.
The polymethyl methacrylate-based (co) polymer (hereinafter sometimes referred to as polymer (C)) is a polymer or copolymer using a methyl methacrylate monomer, and the resin (B) described above. Can be used as long as the pencil hardness is higher than F.
The polymer (C) has a methyl methacrylate monomer unit as a main constituent unit, and specifically, a homopolymer of alkyl methacrylate having usually 1 to 18 carbon atoms in the alkyl group. Those obtained by copolymerizing a vinyl monomer copolymerizable with an alkyl methacrylate are preferred. When the alkyl group has 19 or more carbon atoms, the copolymerization reaction becomes difficult.

  Examples of such alkyl methacrylates include methyl methacrylate, ethyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, cyclohexyl methacrylate, and the like.

  Examples of vinyl monomers copolymerizable therewith include alkyl acrylates such as methyl acrylate, propyl acrylate, butyl acrylate, hexyl acrylate, and 2-ethylhexyl acrylate, styrene, α -Methylstyrene, acrylonitrile, vinyl acetate and the like. The preferable mixing ratio of the alkyl methacrylate and the vinyl monomer copolymerizable therewith is 0 to 30% by mass of another monomer copolymerizable with 70 to 100% by mass of the alkyl methacrylate. .

  In particular, the polymer (C) used in the present invention is preferably an alkyl methacrylate polymer having an alkyl group having 1 to 18 carbon atoms, particularly 1 to 8 carbon atoms, and particularly methyl methacrylate-methyl acrylate. Copolymer.

  The polymethyl methacrylate (co) polymer (C) is preferably a polyfunctional monomer having 2 or more non-conjugated double bonds per molecule that can be copolymerized with an alkyl methacrylate. May be added in an amount of about 0.1 to 20% by weight and may be a crosslinked type produced by copolymerization.

  The polyfunctional monomer having two or more non-conjugated double bonds is mainly used for crosslinking an elastic body component to obtain a crosslinked elastic body. Specific examples thereof include, for example, trimethylolpropane tri (meth) acrylate, allyl methacrylate, triallyl cyanurate, triallyl isocyanate, ethylene glycol dimethacrylate, propylene glycol diallyl ether, divinylbenzene, diethylene glycol dimethacrylate, 1,6-hexane. Examples include diol dimethacrylate. Of these, trimethylolpropane tri (meth) acrylate and the like are preferable.

  The polymethyl methacrylate (co) polymer (C) can be produced by suspension polymerization of the above-described monomers. For example, it can be obtained by suspending polyvinyl alcohol as a dispersant for polymerization, filtering, washing, sieving and drying.

In the present invention, the polymethylmethacrylate (co) polymer (C) having a surface hardness higher than "F" in pencil hardness is used. When the polymer (C) has a pencil hardness higher than F, when the resin composition of the present invention is used as a molded product, no scratch marks remain even if it is rubbed, and the molded product is excellent in scratch resistance. Here, the pencil hardness is as described above.
The pencil hardness of the polymer (C) is preferably F or more, more preferably H or more, further preferably 2H or more, and particularly preferably 3H or more.

  The polymer (C) having such hardness can be selected by appropriately adjusting the type of monomer to be used, its use ratio, molecular weight and the like, and can also be selected from commercially available products.

Content of a polymethylmethacrylate type (co) polymer (C) is 5-100 mass parts with respect to 100 mass parts of aromatic polycarbonate resin (A), Preferably it is 10-50 mass parts. When the use ratio of the polymer (C) is less than 5 parts by mass, the effect of improving the hardness and gloss of the polycarbonate resin cannot be sufficiently obtained. When the use ratio exceeds 70 parts by mass, the impact resistance of the polycarbonate resin It is not preferable since the aromatic polycarbonate resin (A) and the polymer (C) are easily peeled off in layers.
Moreover, it is preferable that content of a polymethylmethacrylate type | system | group (co) polymer (C) is the same as that or more than content of the said resin (B).

[5. Polyester resin (D)]
The polyester resin (D) used in the aromatic polycarbonate resin composition of the present invention is mainly composed of a dicarboxylic acid component comprising a dicarboxylic acid or a reactive derivative thereof and a diol component comprising a diol or an ester derivative thereof. A polymer or copolymer obtained by a condensation reaction comprising a component, preferably a heat obtained by polycondensation reaction with an aromatic dicarboxylic acid as a main acid component and an aliphatic diol as a main alcohol. A plastic polyester resin is used.

  Examples of aromatic dicarboxylic acids include terephthalic acid, isophthalic acid, orthophthalic acid, 1,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, 4,4′-biphenyldicarboxylic acid, and 4,4′-biphenyl ether. Dicarboxylic acid, 4,4′-biphenylmethane dicarboxylic acid, 4,4′-biphenylsulfone dicarboxylic acid, 4,4′-biphenylisopropylidenedicarboxylic acid, 1,2-bis (phenoxy) ethane-4,4′-dicarboxylic acid Acid, 2,5-anthracene dicarboxylic acid, 2,6-anthracene dicarboxylic acid, 4,4′-p-ter-phenylenedicarboxylic acid, 2,5-pyridinedicarboxylic acid, etc., and these substituted products (for example, Alkyl group-substituted products such as 5-methylisophthalic acid) and reactive derivatives (eg dimethyl terephthalate) Le, alkyl ester derivatives such as diethyl terephthalate) and the like can also be used.

  Of these, terephthalic acid, 2,6-naphthalenedicarboxylic acid and their alkyl ester derivatives are more preferred, and terephthalic acid and its alkyl ester derivatives are particularly preferred. These aromatic dicarboxylic acids may be used alone or in combination of two or more, and together with the aromatic dicarboxylic acid, an aliphatic dicarboxylic acid such as adipic acid, azelaic acid, sebacic acid, dodecanedioic acid, One or more alicyclic dicarboxylic acids such as cyclohexanedicarboxylic acid may be used in combination.

  Diols include ethylene glycol, diethylene glycol, 1,2-propylene glycol, 1,3-propanediol, triethylene glycol, 1,4-butanediol, neopentyl. Aliphatic glycols such as glycol, 1,5-pentanediol, 1,6-hexanediol, decamethylene glycol, 2,2-dimethyl-1,3-propanediol; 1 , 4-cyclohexanedimethanol, 1,3-cyclohexanedimethanol, cyclohexanediol, trans- or cis-2,2,4,4-tetramethyl-1,3-cyclobutanediol, etc. Alicyclic diols; p-xylene diol, bisphenol A, tetrabromobisphenol A, tetrabromobisphenol A-bis (2-hydroxyethyl ether), etc. Aromatic Geo - can be exemplified Le, and the like, can also be used these substituents.

  Among these, from the viewpoints of heat resistance, dimensional stability and the like, aliphatic diols are preferable, ethylene glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol are more preferable, ethylene Glycol is particularly preferred.

  Diols may be used alone or in combination of two or more. Further, as the diol component, one or more kinds of long chain diols having a molecular weight of 400 to 6,000, that is, polyethylene glycol, poly-1,3-propylene glycol, polytetramethylene glycol, etc. May be copolymerized in combination with the above diols.

  The polyester resin (D) can be copolymerized with a hydroxycarboxylic acid such as parahydroxybenzoic acid, other carboxylic acids, and alcohols other than the diol. In the present invention, such a copolymer resin is used. You can also. However, such a copolymer component is preferably a small amount, and 80% by mass or more, more preferably 90% by mass or more of the polyester resin (D) is a component from an aromatic dicarboxylic acid and an aliphatic diol. preferable. The aromatic dicarboxylic acid and the aliphatic diol each preferably occupy 80 mol% or more, more preferably 90 mol% or more, with one compound.

  Preferable specific examples of such a polyester resin include polybutylene terephthalate, polybutylene naphthalate, polycyclohexanedimethanol terephthalate, polyethylene terephthalate, and polyethylene naphthalate. These may contain a copolymerization component. In the present invention, among these, it is preferable to use polyethylene terephthalate (PET) or polybutylene terephthalate (PBT), and it is also preferable to use both in combination. When used in combination, the ratio is preferably PET: PBT = 1: 1 to 1: 8 (mass ratio).

  As the polymerization catalyst for producing polyethylene terephthalate, germanium compounds, antimony compounds, tin compounds, titanium compounds and the like are known. In the present invention, it is preferable to use a polymer obtained by polymerizing a germanium compound as a catalyst. When a polymer obtained by polymerization with another catalyst is used, the thermal stability and recyclability of the composition with the finally obtained polycarbonate resin tends to be lowered. Germanium compounds used as catalysts include germanium oxides such as germanium dioxide, germanium alkoxides such as germanium tetraethoxide, germanium tetraisopropoxide, germanium hydroxide and its alkali metal salts, germanium glycolate, germanium chloride, germanium acetate, etc. Is mentioned. These may be used alone or in combination of two or more. Of these, germanium dioxide is preferably used from the viewpoint of solvent resistance and thermal stability of the resulting polyethylene terephthalate.

  The germanium catalyst is preferably used so as to be 15 ppm to 40 ppm as germanium atoms in the polyethylene terephthalate to be produced. If it is less than 15 ppm, the polymerization reaction proceeds slowly, and if it exceeds 40 ppm, a side reaction may occur due to the germanium compound remaining in the resin.

  As polybutylene terephthalate, it is preferable to use a polymer obtained by polymerizing a titanium compound as a main catalyst and a group 1 metal compound or a group 2 metal compound as a cocatalyst. Examples of the titanium compound include inorganic titanium compounds such as titanium oxide and titanium tetrachloride; titanium alcoholates such as tetramethyl titanate, tetraisopropyl titanate and tetrabutyl titanate; titanium phenolates such as tetraphenyl titanate and the like. . Of these, titanium alcoholates are preferably used. Most preferred are tetraalkyl titanates, especially tetrabutyl titanate.

  The titanium compound is preferably used in the resulting polybutylene terephthalate so as to be 20 to 50 ppm, particularly 30 to 40 ppm in terms of titanium atoms. When the amount of the titanium compound used is too large, the color tone and hydrolysis resistance of the polybutylene terephthalate to be produced may decrease, or solution haze and foreign matter increase may occur due to the deactivation of the titanium catalyst. Conversely, if the amount is too small, the polymerizability of polybutylene terephthalate tends to decrease.

  The molecular weight of the polyester resin (D) is that the intrinsic viscosity (Iv) measured at 30 ° C. in a mixed solvent of phenol and tetrachloroethane (mass ratio = 50/50) is 0.4 to 2.0. preferable. If a material having an intrinsic viscosity of less than 0.4 is used, the mechanical strength of the resin composition is inferior. Conversely, if it has a viscosity exceeding 2.0, the moldability tends to decrease. The preferable intrinsic viscosity of the polyester resin is 0.6 to 1.2.

  As the polyester resin (D), not only virgin products but also those recycled from used products, so-called material-recycled ones can be used, and defective products, sprues, runners, etc. during molding It is also possible to use a recycled material, and it is also preferable to use such a recycled material for the polyester resin (D).

Content of a polyester resin (D) is 5-60 mass parts with respect to 100 mass parts of aromatic polycarbonate resin (A). When the content of the polyester resin (D) is less than 5 parts by mass, the effect of improving the chemical resistance, hardness and gloss of the polycarbonate resin cannot be sufficiently obtained, and when the content exceeds 60 parts by mass, the polycarbonate resin The impact resistance of the resin tends to decrease, and the aromatic polycarbonate resin (A) and the polymer (C) are easily peeled off in a layered manner, which is not preferable.
The upper limit of the content of the polyester resin (D) is preferably 50 parts by mass or less, more preferably 40 parts by mass or less, and particularly preferably 30 parts by mass or less. Further, the lower limit of the content is preferably 10 parts by mass or more, more preferably 13 parts by mass or more, and particularly preferably 15 parts by mass or more.

[6. Core / shell type graft copolymer elastomer (E)]
The aromatic polycarbonate resin composition of the present invention preferably contains a core / shell type graft copolymer elastomer (E).
Conventionally, diene rubber has often been used as an elastomer, but diene rubber is easily oxidized and discolored during molding. In the present invention, such a core / shell type elastomer (E) By using in combination with the resin (B), the polymer (C) and the polyester resin (D), an aromatic polycarbonate resin composition having excellent impact resistance while preventing poor appearance can be obtained.

  The core / shell type graft copolymer elastomer (E) is at least one rubber selected from butadiene-containing rubber, butyl acrylate-containing rubber, 2-ethylhexyl acrylate-containing rubber, and silicone rubber, among others. A core / shell comprising a polymer as a core layer and a shell layer formed by copolymerizing at least one monomer component selected from an acrylic ester, a methacrylic ester, and an aromatic vinyl compound around the polymer layer A type graft copolymer is particularly preferred. The core / shell type graft copolymer preferably contains 40% by mass or more of a rubber component, and more preferably contains 60% by mass or more. Moreover, what contains 10 mass% or more of (meth) acrylic acid is preferable.

  Preferred examples of these core / shell type graft copolymer elastomers (E) include methyl methacrylate-butadiene-styrene copolymer (MBS), methyl methacrylate-butadiene copolymer (MB), methyl methacrylate-acrylic rubber copolymer. Polymer (MA), methyl methacrylate-acrylic rubber-styrene copolymer (MAS), methyl methacrylate-acrylic butadiene rubber copolymer, methyl methacrylate-acrylic butadiene rubber-styrene copolymer, methyl methacrylate- (acrylic Silicone IPN rubber) copolymer and the like. Such rubbery polymers may be used alone or in combination of two or more.

  Examples of such a core / shell type graft copolymer-based elastomer include “Paraloid (registered trademark, hereinafter the same) EXL2602”, “Paraloid EXL2603”, “Paraloid EXL2633”, “Rohm and Haas Japan,” “Paraloid EXL2655”, “Paraloid EXL2311”, “Paraloid EXL2313”, “Paraloid EXL2315”, “Paraloid KM330”, “Paraloid KM336P”, “Paraloid KCZ201”, “Metabrene (registered trademark, hereinafter the same) C-M” manufactured by Mitsubishi Rayon Co., Ltd. "223A", "Metabrene E-901", "Metabrene S-2001", "Metabrene SRK-200", "Kaneace (registered trademark, the same shall apply hereinafter) M-511", "Kaneace M-600", "Kaneace M-600", " Mosquito Ace M-400 "," Kane Ace M-580 ", and" Kane Ace MR-01 ", and the like.

  The content of the core / shell type elastomer (E) is preferably 2 parts by mass or more, more preferably 3 parts by mass or more, and particularly preferably 4 parts by mass with respect to 100 parts by mass of the polycarbonate resin (A). That's it. Moreover, the upper limit becomes like this. Preferably it is 40 mass parts or less, More preferably, it is 35 mass parts or less, Most preferably, it is 30 mass parts or less, Especially, it is 20 mass parts or less. When the content of the core / shell type elastomer (E) is smaller than the lower limit value of the above range, the impact resistance improving effect tends to be insufficient, and when the content exceeds the upper limit value of the above range, the polycarbonate resin composition Deterioration of appearance and heat resistance of molded products that are molded products are likely to occur.

[7. UV absorber]
It is preferable to mix | blend a ultraviolet absorber with the composition of this invention. Examples of ultraviolet absorbers include inorganic ultraviolet absorbers such as cerium oxide and zinc oxide; organics such as benzotriazole compounds, benzophenone compounds, salicylate compounds, cyanoacrylate compounds, triazine compounds, oxanilide compounds, malonic ester compounds, and hindered amine compounds. Examples include ultraviolet absorbers. Of these, organic ultraviolet absorbers are preferred, and benzotriazole compounds are more preferred. By selecting the organic ultraviolet absorber, the polycarbonate resin composition of the present invention has good transparency and mechanical properties.

  Specific examples of the benzotriazole compound include, for example, 2- (2′-hydroxy-5′-methylphenyl) benzotriazole, 2- [2′-hydroxy-3 ′, 5′-bis (α, α-dimethylbenzyl). ) Phenyl] -benzotriazole, 2- (2′-hydroxy-3 ′, 5′-di-tert-butyl-phenyl) -benzotriazole, 2- (2′-hydroxy-3′-tert-butyl-5 ′) -Methylphenyl) -5-chlorobenzotriazole, 2- (2'-hydroxy-3 ', 5'-di-tert-butyl-phenyl) -5-chlorobenzotriazole), 2- (2'-hydroxy-3 ', 5'-di-tert-amyl) -benzotriazole, 2- (2'-hydroxy-5'-tert-octylphenyl) benzotriazole, 2,2′-methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2N-benzotriazol-2-yl) phenol] and the like, among others, 2- (2′- Hydroxy-5'-tert-octylphenyl) benzotriazole, 2,2'-methylenebis [4- (1,1,3,3-tetramethylbutyl) -6- (2N-benzotriazol-2-yl) phenol] And 2- (2′-hydroxy-5′-tert-octylphenyl) benzotriazole is particularly preferable.

  Specific examples of such benzotriazole compounds include “Seesorb 701”, “Seesorb 702”, “Seesorb 703”, “Seesorb 704”, and “Seesorb 705” manufactured by Sipro Kasei Co., Ltd. (trade names, the same applies hereinafter). , “Seasorb 709”, “Biosorb 520”, “Biosorb 580”, “Biosorb 582”, “Biosorb 583” manufactured by Kyodo Yakuhin Co., Ltd. “UV5411”, “LA-32”, “LA-38”, “LA-36”, “LA-34”, “LA-31”, manufactured by Adeka Corporation, “Tinuvin P”, “Cinuvin” manufactured by Ciba Specialty Chemicals 234 "," Tinubin 326 "," Tinubin 327 "," Tinubin 3 8 ", and the like.

The content of the ultraviolet absorber is preferably 0.1 parts by mass or more, more preferably 0.3 parts by mass or more with respect to 100 parts by mass of the aromatic polycarbonate resin (A), and the upper limit is preferably 1 part by mass or less, more preferably 0.5 part by mass or less.
If the content of the UV absorber is below the lower limit of the above range, the effect of improving the weather resistance may be insufficient, and if the content of the UV absorber exceeds the upper limit of the above range, the mold Debogit etc. may occur and cause mold contamination. In addition, 1 type may contain the ultraviolet absorber and 2 or more types may contain it by arbitrary combinations and a ratio.

[8. Other additives]
The polycarbonate resin composition of the present invention may further contain various additives as long as the effects of the present invention are not impaired. Such additives include stabilizers, antioxidants, mold release agents, dyes and pigments, fluorescent whitening agents, anti-dripping agents, antistatic agents, antifogging agents, lubricants, antiblocking agents, fluidity improvers, Examples include plasticizers, dispersants, antibacterial agents, flame retardants, and the like.

-Stabilizer As a stabilizer, a phosphorus compound is mentioned, for example. Any known phosphorous compound can be used. Specific examples include phosphorus oxo acids such as phosphoric acid, phosphonic acid, phosphorous acid, phosphinic acid, and polyphosphoric acid; acidic pyrophosphate metal salts such as acidic sodium pyrophosphate, acidic potassium pyrophosphate, and acidic calcium pyrophosphate; phosphoric acid Examples thereof include phosphates of Group 1 or Group 10 metals such as potassium, sodium phosphate, cesium phosphate, and zinc phosphate; organic phosphate compounds, organic phosphite compounds, and organic phosphonite compounds.

  Among them, triphenyl phosphite, tris (monononylphenyl) phosphite, tris (monononyl / dinonyl phenyl) phosphite, tris (2,4-di-tert-butylphenyl) phosphite, monooctyl diphenyl phosphite, Dioctyl monophenyl phosphite, monodecyl diphenyl phosphite, didecyl monophenyl phosphite, tridecyl phosphite, trilauryl phosphite, tristearyl phosphite, 2,2-methylenebis (4,6-di-tert-butylphenyl) ) Organic phosphites such as octyl phosphite are preferred.

  The content of the stabilizer is usually 0.001 parts by mass or more, preferably 0.01 parts by mass or more, more preferably 0.03 parts by mass or more with respect to 100 parts by mass of the polycarbonate resin (A). Usually, it is 1 mass part or less, Preferably it is 0.7 mass part or less, More preferably, it is 0.5 mass part or less. If the amount of the stabilizer is too small, the heat stabilizing effect may be insufficient. If the amount of the stabilizer is too large, the effect may reach a peak and may not be economical.

-Antioxidant As an antioxidant, a hindered phenolic antioxidant is mentioned, for example. Specific examples thereof include pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl). ) Propionate, thiodiethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], N, N′-hexane-1,6-diylbis [3- (3,5-di-) tert-butyl-4-hydroxyphenylpropionamide), 2,4-dimethyl-6- (1-methylpentadecyl) phenol, diethyl [[3,5-bis (1,1-dimethylethyl) -4-hydroxyphenyl ] Methyl] phosphoate, 3,3 ′, 3 ″, 5,5 ′, 5 ″ -hexa-tert-butyl-a, a ′, a ″-(mesi Tylene-2,4,6-triyl) tri-p-cresol, 4,6-bis (octylthiomethyl) -o-cresol, ethylenebis (oxyethylene) bis [3- (5-tert-butyl-4- Hydroxy-m-tolyl) propionate], hexamethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 1,3,5-tris (3,5-di-tert- Butyl-4-hydroxybenzyl) -1,3,5-triazine-2,4,6 (1H, 3H, 5H) -trione, 2,6-di-tert-butyl-4- (4,6-bis ( Octylthio) -1,3,5-triazin-2-ylamino) phenol and the like.

  Among them, pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate preferable.

  The content of the antioxidant is usually 0.001 part by mass or more, preferably 0.01 part by mass or more, and usually 1 part by mass or less, preferably 0 with respect to 100 parts by mass of the polycarbonate resin (A). .5 parts by mass or less. When the content of the antioxidant is less than or equal to the lower limit of the range, the effect as an antioxidant may be insufficient, and when the content of the antioxidant exceeds the upper limit of the range, There is a possibility that the effect reaches its peak and is not economical.

-Release agent Examples of the release agent include aliphatic carboxylic acids, esters of aliphatic carboxylic acids and alcohols, aliphatic hydrocarbon compounds having a number average molecular weight of 200 to 15,000, and polysiloxane silicone oils. It is done.

  Examples of the aliphatic carboxylic acid include saturated or unsaturated aliphatic monovalent, divalent or trivalent carboxylic acid. Here, the aliphatic carboxylic acid includes alicyclic carboxylic acid. Among these, preferable aliphatic carboxylic acids are monovalent or divalent carboxylic acids having 6 to 36 carbon atoms, and aliphatic saturated monovalent carboxylic acids having 6 to 36 carbon atoms are more preferable. Specific examples of such aliphatic carboxylic acids include palmitic acid, stearic acid, caproic acid, capric acid, lauric acid, arachidic acid, behenic acid, lignoceric acid, serotic acid, mellicic acid, tetrariacontanoic acid, montanic acid, adipine Examples include acids and azelaic acid.

  As aliphatic carboxylic acid in ester of aliphatic carboxylic acid and alcohol, the same thing as the said aliphatic carboxylic acid can be used, for example. On the other hand, examples of the alcohol include saturated or unsaturated monohydric or polyhydric alcohols. These alcohols may have a substituent such as a fluorine atom or an aryl group. Among these, a monovalent or polyvalent saturated alcohol having 30 or less carbon atoms is preferable, and an aliphatic or alicyclic saturated monohydric alcohol or aliphatic saturated polyhydric alcohol having 30 or less carbon atoms is more preferable.

  Specific examples of such alcohols include octanol, decanol, dodecanol, stearyl alcohol, behenyl alcohol, ethylene glycol, diethylene glycol, glycerin, pentaerythritol, 2,2-dihydroxyperfluoropropanol, neopentylene glycol, ditrimethylolpropane, dipentaerythritol, and the like. Is mentioned.

  Specific examples of esters of aliphatic carboxylic acids and alcohols include beeswax (a mixture based on myricyl palmitate), stearyl stearate, behenyl behenate, stearyl behenate, glycerin monopalmitate, glycerin monostearate Examples thereof include rate, glycerol distearate, glycerol tristearate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate, pentaerythritol tetrastearate and the like.

Examples of the aliphatic hydrocarbon having a number average molecular weight of 200 to 15,000 include liquid paraffin, paraffin wax, microwax, polyethylene wax, Fischer-Tropsch wax, and α-olefin oligomer having 3 to 12 carbon atoms. Here, the aliphatic hydrocarbon includes alicyclic hydrocarbons.
Among these, paraffin wax, polyethylene wax, or a partial oxide of polyethylene wax is preferable, and paraffin wax and polyethylene wax are more preferable.
The number average molecular weight of the aliphatic hydrocarbon is preferably 5,000 or less.

  The content of the release agent is usually 0.001 parts by mass or more, preferably 0.01 parts by mass or more, and usually 2 parts by mass or less, preferably 1 with respect to 100 parts by mass of the polycarbonate resin (A). It is below mass parts. When the content of the release agent is not more than the lower limit of the above range, the effect of releasability may not be sufficient, and when the content of the release agent exceeds the upper limit of the above range, hydrolysis resistance And mold contamination during injection molding may occur.

-Dye / pigment Examples of the dye / pigment include inorganic pigments, organic pigments, and organic dyes.
Examples of inorganic pigments include sulfide pigments such as carbon black, cadmium red, and cadmium yellow; silicate pigments such as ultramarine blue; titanium oxide, zinc white, petal, chromium oxide, iron black, titanium yellow, zinc- Oxide pigments such as iron brown, titanium cobalt green, cobalt green, cobalt blue, copper-chromium black and copper-iron black; chromic pigments such as chrome lead and molybdate orange; Examples include Russian pigments.

  Examples of organic pigments and organic dyes include phthalocyanine dyes such as copper phthalocyanine blue and copper phthalocyanine green; azo dyes such as nickel azo yellow; thioindigo, perinone, perylene, quinacridone, dioxazine, iso Examples thereof include condensed polycyclic dyes such as indolinone and quinophthalone; quinoline, anthraquinone, heterocyclic and methyl dyes.

Among these, titanium oxide, carbon black, cyanine-based, quinoline-based, anthraquinone-based, phthalocyanine-based dyes and the like are preferable from the viewpoint of thermal stability.
In addition, 1 type may contain the dye / pigment, and 2 or more types may contain it by arbitrary combinations and a ratio. In addition, dyes and pigments may be used as masterbatches with polystyrene resins, polycarbonate resins, and acrylic resins for the purpose of improving handling during extrusion and improving dispersibility in the resin composition. Good.

  The content of the dye / pigment is usually 5 parts by mass or less, preferably 3 parts by mass or less, more preferably 2 parts by mass or less with respect to 100 parts by mass of the aromatic polycarbonate resin (A). If the content of the dye / pigment is too large, the impact resistance may not be sufficient.

[9. Production method of polycarbonate resin composition]
There is no restriction | limiting in the manufacturing method of the aromatic polycarbonate resin composition of this invention, The manufacturing method of a well-known polycarbonate resin composition can be employ | adopted widely, Aromatic polycarbonate resin (A), resin (B), polymethylmethacrylate type | system | group ( Co) polymer (C) and polyester resin (D), and other components blended as necessary are premixed using various mixers such as a tumbler, Henschel mixer, super mixer, ribbon blender, etc. Then, a method of melt kneading with a mixer such as a Banbury mixer, a roll, a Brabender, a single screw kneading extruder, a twin screw kneading extruder, or a kneader can be mentioned. The temperature for melt kneading is not particularly limited, but is usually in the range of 240 to 320 ° C.

[10. Molding method]
The aromatic polycarbonate resin composition of the present invention can be produced by molding pelletized pellets by various molding methods. Further, the resin melt-kneaded by an extruder can be directly made into a sheet, a film, a profile extrusion-molded product, a blow-molded product, an injection-molded product or the like without going through pellets.
Examples of molding methods include injection molding methods, ultra-high speed injection molding methods, injection compression molding methods, two-color molding methods, hollow molding methods such as gas assist, molding methods using heat insulating molds, and rapid heating molds. Molding method used, foam molding (including supercritical fluid), insert molding, IMC (in-mold coating molding) molding method, extrusion molding method, sheet molding method, thermoforming method, rotational molding method, laminate molding method, press molding Law. A molding method using a hot runner method can also be used. There is no limitation on the shape, pattern, color, size, etc. of the molded product, and it may be set arbitrarily according to the application of the molded product.

[11. Molding]
A preferable molded article obtained by molding the composition of the present invention is excellent in appearance, and excellent in impact resistance and hardness. Therefore, the casing for portable terminals, car navigation and car audio, parts for instrument panels, parts for console boxes (knobs) (Including volume, etc.), automotive interior parts such as center clusters and meter clusters, flat display panels, personal computers, PDAs, televisions, videos, cameras, printers, FAX, etc. be able to.

  Hereinafter, the present invention will be described more specifically with reference to examples. However, the present invention is not construed as being limited to the following examples.

[Materials used]
The materials used in Examples and Comparative Examples are as follows.
The pencil hardness of each material used as the aromatic polycarbonate resin (A), the acrylic copolymer (C) and the polyester resin (D) is described later [3. [Surface hardness evaluation]

Aromatic polycarbonate resin (A):
Product name "Iupilon (registered trademark) S-3000" manufactured by Mitsubishi Engineering Plastics Co., Ltd.
Viscosity average molecular weight 22,000, pencil hardness 2B

-Resin (B):
Resin composition comprising methyl methacrylate-acrylonitrile-butadiene-styrene The respective ratios are 15: 28: 10: 47 (mass%) (hereinafter referred to as “B-1”).
Resin composition comprising methyl methacrylate-acrylonitrile-butadiene-styrene The respective ratios were 58: 4: 15: 23 (mass%) (hereinafter referred to as “B-2”).
・ Polymethyl methacrylate copolymer (C):
Methyl methacrylate-methyl acrylate copolymer:
Product name “Acrypet VH001” manufactured by Mitsubishi Rayon Co., Ltd.
Pencil hardness 2H

・ Polyester resin (D):
Polybutylene terephthalate resin, trade name “Novaduran (registered trademark) 5010L” manufactured by Mitsubishi Engineering Plastics Co., Ltd.,
Iv value = 1.00 (Phenol: tetrachloroethane = 1: 1 in a 30 ° C. atmosphere)
Pencil hardness 2B

-Core / shell type graft copolymer elastomer (E):
Core / shell type copolymer consisting of alkyl acrylate polymer (core) / alkyl methacrylate polymer (shell):
Product name "Paraloid EXL-2315" manufactured by Rohm and Haas Co., Ltd.

(F) Phosphorus heat stabilizer:
Tris (2,4-di-tert-butylphenyl) phosphite Product name “ADK STAB 2112” manufactured by Asahi Denka Kogyo Co., Ltd.
(G) Phenolic antioxidants:
Pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], manufactured by Ciba Specialty Chemicals, Inc., “trade name: Irganox 1010”
(H) Release agent:
Pentaerythritol tetrastearate Cognis Japan Co., Ltd. trade name “Roxyol VPG861”
(I) Colorant: Carbon Black Trade name “# 900” manufactured by Mitsubishi Chemical Corporation

Moreover, the following acrylonitrile-ethylenepropylene-styrene copolymer (AES) was used in the comparative example as resin which does not satisfy | fill the prescription | regulation of resin (B) of this invention.
Acrylonitrile-ethylenepropylene-styrene copolymer (J):
Product name “E700N” manufactured by UMG ABS Co., Ltd.

[Measurement and evaluation method]
The measurement / evaluation methods used in Examples and Comparative Examples are as follows.
[1. Appearance evaluation]
Surface appearance:
A 3 mm-thick flat plate test piece molded by the method described later was visually judged according to the following criteria, and the appearance was evaluated.
○: The surface of the molded product is good with no peeling (delamination, so-called “delamination”).
Δ: Delamination is slightly noticeable.
X: The occurrence of delamination is very conspicuous.

[2. Appearance evaluation after chemical resistance test]
A protective glaze for automobiles manufactured by US Armadoor Co., Ltd., trade name “Armor All Protectant” was sprayed on the surface of a flat plate test piece of 50 × 90 × 3 mm, which will be described later. The plate test piece was allowed to stand for a period of time, and the appearance of the subsequent flat plate test piece was determined according to the following criteria and visually evaluated.
○: Good with no change in appearance. Δ: White fogging is slightly observed on the surface.
X: White cloudiness is observed on the entire surface.

[3. Impact resistance evaluation]
Impact resistance (Charpy impact strength) (Unit: kJ / m ² )
Based on ISO 179-1 and 179-2, a Charpy impact strength (kJ / m ² ) was measured at a temperature of 23 ° C. for a notched and unnotched test piece having a thickness of 3 mm formed by the method described later. The larger the value, the better the impact resistance. In the table, “Charpy impact strength” is indicated. In the table, “NB” indicates that the tester did not break with a weighing scale of 15 J.

[4. Surface hardness evaluation]
Pencil hardness:
According to JIS K5400, a scratch test was performed 5 times on a 3 mm-thick flat plate test piece molded by the method described below to evaluate the hardness. In the table, it is expressed as “pencil hardness”.

[5. Self-tapping evaluation]
Test with a boss inner diameter of 2.44 mmφ and a boss hole outer diameter of 7.27 to 7.52 mmφ formed by a method described later, with a tapped screw (standard PM 3 × 6) having a thread diameter of 3.02 mm and a thread valley diameter of 2.17 mm Screwed into the boss (hook ratio: about 68%), the presence or absence of boss cracks was confirmed.

(Examples 1-10, Comparative Examples 1-10)
Each material described in Table 1 and Table 2 below was mixed in the content (all parts by mass) described in each table for 20 minutes with a tumbler, and then a twin-screw extruder manufactured by Nippon Steel Works Co., Ltd. equipped with 1 vent ( TEX30HSST), kneaded under the conditions of a screw speed of 200 rpm, a discharge rate of 20 kg / hour, and a barrel temperature of 260 ° C., the molten resin composition extruded in a strand form is rapidly cooled in a water tank, and pelletized using a pelletizer A pellet of polycarbonate resin composition was obtained.

[Molding specimen]
The obtained pellets are dried at 80 ° C. for 5 hours, and then injection molded on an injection molding machine (“J50EP” manufactured by Nippon Steel) under conditions of a cylinder temperature of 260 ° C., a mold temperature of 80 ° C., and a molding cycle of 50 seconds. Then, an impact resistance test piece having a thickness of 3 mm, a flat plate test piece having a thickness of 50 × 90 × 3 mm, and a self-tapping test boss were produced.
The measurement results for these test pieces are shown in Tables 1 and 2 below.

From the results of the examples and comparative examples, the following can be understood.
In Examples 1 to 10 (Table 1), the blending ratio of the component (B) to the component (I) is changed within the specified range of the present invention, but the comparative example in which the component (B) is not prescribed. 7, 8 and 10 (Table 2), or the comparative example 7 using the component (I) which is not the component (B) of the present invention, the appearance of the molded product is excellent, the impact strength is remarkably excellent, the hardness It can be seen that the self-tapping property is also excellent. Moreover, it turns out that the surface hardness is bad with B in the comparative examples 9 and 10 which did not use the (C) component of this invention.
Therefore, an aromatic polycarbonate resin composition and a molded article excellent in appearance, excellent in impact resistance, hardness, and self-tapping properties from the above examples and comparative examples are obtained for the first time by the configuration of the present invention. Was confirmed.

  The aromatic polycarbonate resin composition of the present invention is excellent in appearance, excellent in impact resistance and hardness, and excellent in self-tapping properties, and is therefore suitable for a molded product having a screw insertion portion. Products include car navigation and car audio enclosures, front panel and knob volumes, instrument panel parts, console box parts, door trims, center clusters, meter clusters and other automotive interior parts, flat display panels, personal computers It can be used in a wide range of fields such as PDA, TV, video, camera, printer, FAX and other electrical / electronic / OA equipment housings, and has very high industrial applicability.

Claims (8)

  (A) alkyl (meth) acrylate monomer unit, (b) vinyl cyanide monomer unit, (c) conjugated diene monomer unit and 100 parts by mass of aromatic polycarbonate resin (A) (D) 5 to 200 parts by mass of a resin (B) composed of an aromatic vinyl monomer unit, 5 to 100 parts by mass of a polymethyl methacrylate (co) polymer (C) having a pencil hardness higher than F, An aromatic polycarbonate resin composition comprising 5 to 60 parts by mass of a polyester resin (D).   2. The aromatic polycarbonate resin composition according to claim 1, wherein the content of the polymethyl methacrylate (co) polymer (C) is the same as or higher than the content of the resin (B).   The aromatic polycarbonate resin composition according to claim 1 or 2, wherein the resin (B) is a resin comprising an alkyl methacrylate, butadiene, acrylonitrile, and a styrene unit.   The aromatic polycarbonate resin composition according to any one of claims 1 to 3, wherein the polyester resin (B) is polybutylene terephthalate.   Furthermore, the aromatic polycarbonate in any one of Claims 1-4 which contains 2-40 mass parts of core / shell type graft copolymer system elastomer (E) with respect to 100 mass parts of aromatic polycarbonate resin (A). Resin composition.   The molded article obtained from the resin composition in any one of Claims 1-5.   The molded article according to claim 6, wherein the molded article is a casing for a portable terminal or a car navigation system.   The molded article according to claim 6, wherein the molded article is a part for an instrument panel for an automobile interior or a part for a console box.