JP7126926B2 - Polycarbonate resin composition and method for producing polycarbonate resin composition pellets - Google Patents

Description

TECHNICAL FIELD The present invention relates to a polycarbonate resin composition and a method for producing polycarbonate resin composition pellets, and more particularly, to a method for producing polycarbonate resin composition pellets with reduced odor while maintaining the excellent properties of a polycarbonate/styrene resin alloy. Regarding.

Polycarbonate resins are resins with excellent heat resistance, mechanical properties, and electrical properties, and are widely used, for example, in automobile materials, electrical and electronic equipment materials, housing materials, and other parts manufacturing materials in industrial fields. In addition, many polymer alloys have been developed by blending polycarbonate resin with other thermoplastic resins. Polymer alloys with styrenic resins reduce costs and improve moldability and impact resistance of polycarbonate resins. It is widely used as parts of electrical and electronic equipment such as various computers, personal computers, various mobile terminals, printers, copiers, and OA information equipment, and is also frequently used as automobile parts.

Particularly for automobile applications, an alloy obtained by blending a styrene-based resin, particularly an ABS resin, with a polycarbonate resin as a main component is used as an interior material for reasons such as ease of molding and weight reduction. However, the above alloys contain volatile organic compounds.

In the automotive field, there has been a demand for reducing volatile organic compounds (VOC) in the interior of automobiles. Recently, standards for air quality in passenger cars have become extremely sophisticated, and not only reduction of VOCs but also odor reduction is required, and odorlessness is particularly important.

Conventionally, it has been proposed to add various additives to improve the odor of thermoplastic resins. However, since polycarbonate resins have high melt viscosities, high temperatures are required for melt-molding. Therefore, resin compositions containing polycarbonate resins as a main component tend to cause problems of oxidation, deterioration, and odor. In addition, when adding additives to the polycarbonate resin composition, it is necessary not to contain compounds that deteriorate the excellent properties of the polycarbonate resin itself. It is required that there are no problems such as occurrence.

An object of the present invention is to provide a polycarbonate resin composition free from odor problems, in a resin alloy containing a polycarbonate resin as a main component and a styrene resin, while maintaining the excellent properties of the polycarbonate resin itself. ).

In order to achieve the above object, the present inventors have made intensive studies and found that a polycarbonate/styrenic resin composition containing an epoxy compound, a higher fatty acid metal salt and/or an alkylphosphonium salt in specific amounts, respectively, is the above object. The present invention has been achieved by finding a solution to the above.
The present invention relates to the following polycarbonate resin composition, a molded article thereof, and a method for producing polycarbonate resin composition pellets.

[1] Polycarbonate resin (A) 50% by mass to 95% by mass, styrene resin (B) less than 50% by mass and 5% by mass or more to 100 parts by mass of resin component, epoxy compound (C) 0.01 to 3 parts by mass, 0.005 to 2 parts by mass of a higher fatty acid metal salt (D) and/or 0.01 to 2 parts by mass of an alkylphosphonium salt (E).
[2] The polycarbonate resin composition according to [1] above, wherein the styrene resin (B) is an emulsion-polymerized styrene resin.
[3] The polycarbonate resin composition according to [1] or [2] above, wherein the styrene resin (B) contains an aromatic vinyl-diene-vinyl cyanide copolymer.
[4] The polycarbonate resin composition according to any one of [1] to [3] above, wherein the epoxy compound (C) is an alicyclic epoxy compound.
[5] The polycarbonate resin composition according to any one of [1] to [4] above, wherein the metal of the higher fatty acid metal salt (D) is at least one selected from zinc, magnesium, barium and calcium.
[6] The polycarbonate resin composition according to any one of [1] to [5] above, wherein the alkylphosphonium salt is a butylphosphonium salt.

[7] A molded article of the polycarbonate resin composition according to any one of [1] to [6] above.
[8] The polycarbonate resin composition according to any one of the above [1] to [6] is melt-kneaded with a vented twin-screw extruder, and then extruded from the exit of the extruder is extruded into a strand-like molten resin in a cooling water tank. A method for producing polycarbonate resin composition pellets obtained by cooling in water at, wherein the water quality of the cooling water tank satisfies the following conditions (1) and (2).
(1) Total organic carbon content (TOC) is 0.01 mg/l to 1.0 mg/l
(2) Electrical conductivity (EC) is 0.1 μS/cm to 10 μS/cm

The polycarbonate resin composition of the present invention maintains the excellent properties of the polycarbonate resin/styrenic resin alloy, has no odor problem, and is excellent in hue and mold deposit resistance.

FIG. 1 is a plan view for explaining the shape of a drop-shaped mold used for evaluation of mold contamination.

Hereinafter, the present invention will be described in detail with reference to embodiments, examples, and the like, but the present invention should not be construed as being limited to the embodiments, examples, and the like shown below.
In this specification, unless otherwise specified, the term "~" is used to include the numerical values before and after it as lower and upper limits.

Polycarbonate resin composition of the present invention, the epoxy compound ( C) 0.01 to 3 parts by mass, higher fatty acid metal salt (D) 0.005 to 2 parts by mass and/or alkylphosphonium salt (E) 0.01 to 2 parts by mass.

[Polycarbonate resin (A)]
The polycarbonate resin composition of the present invention contains a polycarbonate resin (A).
The polycarbonate resin (A) includes an aromatic polycarbonate resin, an aliphatic polycarbonate resin, and an aromatic-aliphatic polycarbonate resin, preferably an aromatic polycarbonate resin, specifically an aromatic dihydroxy compound. A thermoplastic aromatic polycarbonate polymer or copolymer obtained by reacting with phosgene or a diester of carbonic acid is used.

Aromatic dihydroxy compounds include 2,2-bis(4-hydroxyphenyl)propane (that is, bisphenol A), tetramethylbisphenol A, α,α'-bis(4-hydroxyphenyl)-p-diisopropylbenzene, hydroquinone. , resorcinol, 4,4′-dihydroxydiphenyl and the like. In addition, in order to improve flame retardancy, a compound in which one or more tetraalkylphosphonium sulfonates are bonded to the above-mentioned aromatic dihydroxy compound, a polymer containing phenolic OH groups at both ends having a siloxane structure, or an oligomer thereof is used. good too.

Preferred examples of the polycarbonate resin (A) include 2,2-bis(4-hydroxyphenyl)propane, ie, bisphenol A as a dihydroxy compound, or a polycarbonate resin in which bisphenol A is used in combination with another aromatic dihydroxy compound. .

The polycarbonate resin may be a homopolymer consisting of one kind of repeating unit, or a copolymer having two or more kinds of repeating units. At this time, the copolymer can be selected from various copolymerization forms such as random copolymers and block copolymers.

The molecular weight of the polycarbonate resin (A) is not limited, but the viscosity average molecular weight (Mv) is preferably 10,000 to 40,000, more preferably 14,000 to 32,000. When the viscosity-average molecular weight is within this range, the resulting resin composition has good moldability, and a molded product with high mechanical strength can be easily obtained. The most preferred range of viscosity-average molecular weight of the polycarbonate resin (A) is 16,000-30,000.

In the present invention, the viscosity average molecular weight (Mv) of the polycarbonate resin (A) is determined by measuring the viscosity of a methylene chloride solution of the polycarbonate resin at 25 ° C. using an Ubbelohde viscometer, and determining the intrinsic viscosity ([η]). is calculated from the following Schnell viscosity equation.
[η]=1.23×10 ⁻⁴ Mv ^0.83

The method for producing the polycarbonate resin (A) is not particularly limited, and polycarbonate resins produced by either the phosgene method (interfacial polymerization method) or the melting method (ester exchange method) can be used. Also preferred is a polycarbonate resin prepared by subjecting a polycarbonate resin produced by a melting method to a post-treatment for adjusting the amount of terminal OH groups.

Moreover, the polycarbonate resin (A) 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. Further, the content of the polycarbonate oligomer contained is preferably 30 mass % or less of the polycarbonate resin (including the polycarbonate oligomer).

As the polycarbonate resin (A), not only virgin raw materials but also aromatic polycarbonate resins recycled from used products, so-called material-recycled aromatic polycarbonate resins, can be used. Used products include optical recording media such as optical discs, light guide plates, automobile window glass and automobile headlamp lenses, vehicle transparent materials such as windshields, containers such as water bottles, eyeglass lenses, soundproof walls and glass windows, and corrugated plates. Construction members such as are preferably included. As the recycled polycarbonate resin, it is also possible to use crushed products obtained from nonconforming products, sprues, runners, or the like, or pellets obtained by melting them.

[Styrene resin (B)]
The polycarbonate resin composition of the present invention contains a styrene resin (B).
The content of the styrene resin (B) is less than 50% by mass and 5% by mass or more based on the total 100% by mass of (A) and (B), and the polycarbonate resin (A) is the main component and 50% by mass % and 95% by mass or less. If the amount of the styrene-based resin (B) is less than 5% by mass, the fluidity during molding is insufficient, resulting in deterioration in moldability. When the content of the styrene-based resin body (B) is 50% by mass or more, the mechanical strength and heat resistance are degraded. The amount of the styrene resin (B) is preferably 45% by mass or less, preferably 10% by mass or more, more preferably 15% by mass or more, still more preferably 20% by mass or more, especially 25% by mass or more, especially 30% by mass or more. It is preferably at least 35% by mass, particularly at least 35% by mass.

As the styrene resin (B), a graft copolymer consisting of a styrene monomer-vinyl cyanide monomer and/or alkyl (meth)acrylate monomer-rubber polymer is preferable.

Styrenic monomers include styrene, α-methylstyrene, o-methylstyrene, p-methylstyrene, vinylxylene, ethylstyrene, dimethylstyrene, p-tert-butylstyrene, vinylnaphthalene, methoxystyrene, monobromostyrene. , dibromostyrene, fluorostyrene, and tribromostyrene, and styrene is particularly preferred. These may be used individually by 1 type, and may be used in mixture of 2 or more types.

Other vinyl monomers copolymerizable with these styrene monomers preferably include vinyl cyanide monomers and/or alkyl (meth)acrylate monomers.
In addition, in this specification, "(meth)acrylate" refers to one or both of "acrylate" and "methacrylate". The same applies to "(meth)acryl" and "(meth)acrylo".

Vinyl cyanide monomers include acrylonitrile, methacrylonitrile, ethacrylonitrile and the like, and acrylonitrile is most preferably used. These can be used alone or in combination of two or more.

Alkyl (meth)acrylate monomers include alkyl esters of acrylic acid such as methyl acrylate, ethyl acrylate, propyl acrylate, butyl acrylate, amyl acrylate, hexyl acrylate, 2-ethylhexyl acrylate, octyl acrylate, cyclohexyl acrylate and dodecyl acrylate. ;
methacrylic acid aryl esters such as phenyl methacrylate and benzyl methacrylate; methacrylic acid alkyl esters such as methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, amyl methacrylate, hexyl methacrylate, 2-ethylhexyl methacrylate, octyl methacrylate, cyclohexyl methacrylate, and dodecyl methacrylate;
Epoxy group-containing methacrylic acid esters such as glycidyl methacrylate; and aryl esters of acrylic acid such as phenyl acrylate and benzyl acrylate.
These can be used alone or in combination of two or more.
Among these, acrylic acid alkyl esters and methacrylic acid alkyl esters are preferable.

Other copolymerizable vinyl monomers other than the above include maleimide-based monomers such as maleimide, N-methylmaleimide, N-phenylmaleimide, and N-cyclohexylmaleimide; acrylic acid, methacrylic acid, (meth)acrylic α,β-unsaturated carboxylic acids such as glycidyl acid, glycidyl itaconate, maleic acid, maleic anhydride, phthalic acid and itaconic acid, and their anhydrides.
These vinyl monomers may be used singly or in combination of two or more.

Rubber having a glass transition temperature of 10° C. or less is suitable as the rubbery polymer copolymerizable with the styrene monomer. Specific examples of such rubbery polymers include diene rubbers, acrylic rubbers, ethylene-propylene rubbers, silicone rubbers, and the like, preferably diene rubbers, acrylic rubbers, and the like.

Examples of diene rubbers include butadienes such as polybutadiene, styrene-butadiene random copolymers and block copolymers, acrylonitrile-butadiene copolymers, butyl acrylate-butadiene copolymers, and butadiene-methyl methacrylate copolymers. - Lower alkyl ester copolymers of (meth)acrylic acid, polyisoprene, ethylene-isoprene copolymers, butadiene-isoprene copolymers, ethylene-propylene-butadiene copolymers, ethylene-propylene-hexadiene copolymers, etc. Examples include ethylene/propylene/non-conjugated diene terpolymers and butadiene-styrene-(meth)acrylic acid lower alkyl ester copolymers.

Acrylic rubbers include, for example, acrylic acid alkyl ester rubbers, where the alkyl group preferably has 1 to 8 carbon atoms. Specific examples of acrylic acid alkyl esters include ethyl acrylate, butyl acrylate, and ethylhexyl acrylate. Ethylenically unsaturated monomers may optionally be used in the acrylic acid alkyl ester rubber. Specific examples of such compounds include di(meth)acrylate, divinylbenzene, trivinylbenzene, triallyl cyanurate, allyl (meth)acrylate, butadiene, isoprene, and the like. Acrylic rubbers further include core-shell type polymers having a crosslinked diene rubber as the core.

Preferred specific examples of the styrene resin (B) include acrylonitrile-butadiene-styrene copolymer (ABS resin), methyl methacrylate-butadiene rubber-styrene copolymer (MBS resin), methyl methacrylate-acrylonitrile-butadiene-styrene copolymer. Polymer (MABS resin), methyl methacrylate-butadiene rubber copolymer (MB resin), acrylonitrile-acrylic rubber-styrene copolymer (AAS resin), acrylonitrile-(ethylene/propylene/diene rubber)-styrene copolymer (AES resin), acrylonitrile-butadiene-styrene-α-methylstyrene copolymer, acrylonitrile-butadiene-styrene-N-phenylmaleimide copolymer, etc. Among these, acrylonitrile-butadiene-styrene copolymer (ABS resin), methyl methacrylate-butadiene rubber-styrene copolymer (MBS resin), and methyl methacrylate-acrylonitrile-butadiene-styrene copolymer (MABS resin) are suitable from the viewpoint of improving moist heat resistance and reducing mold contamination during molding. Especially preferred is acrylonitrile-butadiene-styrene copolymer (ABS resin).
The styrene resin (B) may be used alone or in combination of two or more.

As the styrene resin (B), for example, a styrene resin obtained by emulsion polymerization, or a styrene resin obtained by suspension polymerization or bulk polymerization can be used. is preferably used. A method for producing the styrene resin (B) by emulsion polymerization is known, and it may be produced by a known method, or a commercially available emulsion polymerized product may be used.

Taking an ABS resin as an example, a general method for producing the styrene resin (B) by emulsion polymerization is as follows.
As emulsifiers, rosin acid soaps, which are salts of abietic acid, and higher fatty acid soaps, which are salts of saturated or unsaturated fatty acids having 12 to 32 carbon atoms, are usually preferably used. and a water-soluble polymerization initiator such as potassium peroxodisulfate and α-cumyl hydroperoxide to obtain a polymer latex. Next, the polymer particles are polymerized with an aromatic vinyl monomer and a vinyl cyanide monomer in the presence of a further emulsifier to obtain a polymer latex, which is added with an inorganic acid, a divalent metal salt, or the like. coagulant is added to separate the ABS resin, washed and dried.

As described above, in the washing process, emulsifiers, chain transfer agents, polymerization initiators, etc. are not completely removed, ignoring economic efficiency. It is considered that the component remains and the component derived from the drug causes the odor of the polycarbonate resin composition.

In addition, oligomers remain in the styrene-based resin (B), and it is believed that the oligomer components cause mold contamination and gas generation. The oligomer is not particularly limited, but monomers for constituting the styrene-based resin (B) described above, such as styrene-based monomers, vinyl cyanide-based monomers, alkyl (meth) Examples include oligomers such as acrylate-based monomers.

[Epoxy compound (C)]
The polycarbonate resin composition of the present invention contains an epoxy compound (C).
By containing the epoxy compound (C) together with the higher fatty acid metal salt (D) and/or the alkylphosphonium salt (E), the problem of odor can be solved.

A compound having one or more epoxy groups in one molecule is used as the epoxy compound (C). Specifically, for example, phenyl glycidyl ether, allyl glycidyl ether, t-butylphenyl glycidyl ether, 3,4-epoxycyclohexylmethyl-3′,4′-epoxycyclohexylcarboxylate, 3,4-epoxy-6-methyl Cyclohexylmethyl-3',4'-epoxy-6'-methylcyclohexyl carboxylate, 2,3-epoxycyclohexylmethyl-3',4'-epoxycyclohexyl carboxylate, 4-(3,4-epoxy-5-methyl cyclohexyl)butyl-3',4'-epoxycyclohexyl carboxylate, 3,4-epoxycyclohexylethylene oxide, cyclohexylmethyl 3,4-epoxycyclohexyl carboxylate, 3,4-epoxy-6-methylcyclohexylmethyl-6'-methyl Cylohexyl carboxylate, bisphenol-A diglycidyl ether, tetrabromobisphenol-A glycidyl ether, diglycidyl ester of phthalic acid, diglycidyl ester of hexahydrophthalic acid, bis-epoxydicyclopentadienyl ether, bis-epoxyethylene Glycol, bis-epoxycyclohexyl adipate, butadiene diepoxide, tetraphenylethylene epoxide, octyl epoxytalate, epoxidized polybutadiene, 3,4-dimethyl-1,2-epoxycyclohexane, 3,5-dimethyl-1,2-epoxy Cyclohexane, 3-methyl-5-t-butyl-1,2-epoxycyclohexane, octadecyl-2,2-dimethyl-3,4-epoxycyclohexylcarboxylate, N-butyl-2,2-dimethyl-3,4- Epoxycyclohexyl carboxylate, cyclohexyl-2-methyl-3,4-epoxycyclohexyl carboxylate, N-butyl-2-isopropyl-3,4-epoxy-5-methylcyclohexyl carboxylate, octadecyl-3,4-epoxycyclohexyl carboxylate 2-ethylhexyl-3′,4′-epoxycyclohexyl carboxylate, 4,6-dimethyl-2,3-epoxycyclohexyl-3′,4′-epoxycyclohexyl carboxylate, 4,5-epoxy tetrahydrophthalic anhydride , 3-t-butyl-4,5-epoxy tetrahydrophthalic anhydride, diethyl 4,5-epoxy-cis-1,2-cyclohexyl dika Preferable examples include carboxylate, di-n-butyl-3-t-butyl-4,5-epoxy-cis-1,2-cyclohexyldicarboxylate and the like.
Epoxy compounds may be used alone or in combination of two or more.

As the epoxy compound (C), among the above, an alicyclic epoxy compound, that is, a compound having an epoxy group in which one oxygen atom is added to the ethylene bond in the alicyclic ring is preferable, and 3,4-epoxycyclohexyl is particularly preferable. Methyl-3',4'-epoxycyclohexyl carboxylate is preferred.

The content of the epoxy compound (C) is 0.01 to 3 parts by mass with respect to a total of 100 parts by mass of the polycarbonate resin (A) and the styrene resin (B). By combining the higher fatty acid metal salt (D) and/or the alkylphosphonium salt (E) in a content within such a range, it is possible to obtain a resin composition free from odor problems. If the content exceeds 3 parts by mass, the resin composition will increase in viscosity, resulting in poor moldability. The content of the epoxy compound (C) is preferably 0.05 parts by mass or more, more preferably 0.07 parts by mass or more, still more preferably 0.1 parts by mass or more, and preferably 2.5 parts by mass. Below, more preferably 2 parts by mass or less, still more preferably 1.5 parts by mass or less.

[Higher fatty acid metal salt (D)]
The polycarbonate resin composition of the present invention contains a higher fatty acid metal salt (D).
Since the higher fatty acid metal salt (D) acts as a ring-opening catalyst for the epoxy compound (C) and serves as an accelerator for reducing odor, the problem of odor can be solved by using it in combination.

As the higher fatty acid constituting the higher fatty acid metal salt (D), higher fatty acids preferably having 10 to 22 carbon atoms, such as capric acid, lauric acid, myristic acid, pentadecylic acid, palmitic acid, stearic acid, arachidic acid, behenic acid. Higher saturated fatty acids such as acids can be mentioned, among which lauric acid and stearic acid are preferred, and stearic acid is particularly preferred. A metal salt derived from a fatty acid having less than 10 carbon atoms is not preferable because the effect of the present invention is small.

As metals constituting these metal salts, metals of Groups IA and IB or Groups IIA and IIB of the periodic table are used. Preferred metals include alkali metals such as lithium, sodium and potassium, alkaline earth metals such as magnesium, calcium and barium, zinc and aluminum, and at least one selected from zinc, magnesium, barium and calcium. Preferably.

Specific examples of higher fatty acid metal salts (D) include zinc stearate, barium stearate, calcium stearate, aluminum stearate, magnesium stearate, zinc laurate, barium laurate, calcium laurate, aluminum laurate, and magnesium laurate. , calcium palmitate, magnesium palmitate, and barium palmitate.

The content of the higher fatty acid metal salt (D) is 0.005 to 2 parts by mass with respect to a total of 100 parts by mass of the polycarbonate resin (A) and the styrene resin (B). By combining with the epoxy compound (C) in a content within such a range, it is possible to obtain a resin composition free from the problem of odor. If the content exceeds 2 parts by mass, the decomposition of the resin composition progresses, resulting in deterioration of resistance to moisture and heat, which is not preferable. If the amount is less than 0.005 parts by mass, the odor prevention effect tends to be insufficient. The content of the higher fatty acid metal salt (D) is preferably 0.008 parts by mass or more, preferably 1.5 parts by mass or less, more preferably 1.3 parts by mass or less, and further Preferably, it is 1.0 parts by mass or less.

[Alkylphosphonium salt (E)]
The alkylphosphonium salt (E) is a compound represented by the general formula [PR ₄ ]X, where R is an alkyl group and X is a monovalent anion.

The alkyl group in the above general formula may be branched, linear or cyclic, but preferably branched or linear. R is preferably an alkyl group having 1 to 20 carbon atoms.
Examples of branched or linear alkyl groups include methyl, ethyl, propyl, isopropyl, n-butyl, s-butyl, t-butyl, isobutyl, amyl and isoamyl groups. , t-amyl group, hexyl group, heptyl group, isoheptyl group, t-heptyl group, n-octyl group, isooctyl group, 2-ethylhexyl group, t-octyl group, nonyl group, isononyl group, decyl group, isodecyl group, undecyl group, dodecyl group, tridecyl group, isotridecyl group, tetradecyl group, hexadecyl group, octadecyl group, icosyl group and the like. Cyclic alkyl groups include cyclopentyl, cyclohexyl, methylcyclohexyl, dimethylcyclohexyl, cycloheptyl, and cyclooctyl groups.

Examples of cationic compounds represented by [PR ₄ ] preferably include tetraalkylphosphonium cations, such as tetramethylphosphonium, tetraethylphosphonium, tetrapropylphosphonium, tetrabutylphosphonium, tetrapentylphosphonium, tetrahexylphosphonium, and tetraheptylphosphonium. , tetraoctylphosphonium, tetranonylphosphonium, tetradecylphosphonium, tetradodecylphosphonium, tributylmethylphosphonium, trihexyltetradecylphosphonium and the like.

In the present invention, since the alkylphosphonium salt (E) has the alkylphosphonium, it can capture the odor component of the resin composition, so the anion compound that is the anion of X is not particularly limited. Preferred examples of the anion compound include fluorine-containing anion compounds, sulfonic acid anion compounds, carboxylic acid anion compounds, and inorganic acid anion compounds.

Examples of fluorine-containing anion compounds include bis(perfluoroalkanesulfonyl)imide, perfluoroalkanesulfonic acid, perfluoroalkanecarboxylic acid, tetrafluoroboric acid, hexafluorophosphoric acid, alkanesulfonic acid, and hexafluorophosphate. , tetrafluoroborate, bis(trifluoromethanesulfonyl)imide, bis(pentafluoroethanesulfonyl)imide, (heptafluoropropanesulfonyl)imide, (nonafluorobutanesulfonyl)imide, [(trifluoromethanesulfonyl)(pentafluoroethanesulfonyl) ] Perfluoroalkylsulfonylimide such as imide, trifluoromethanesulfonic acid, pentafluoroethanesulfonic acid, heptafluoropropanesulfonic acid, nonafluorobutanesulfonic acid, heptadecafluorooctane sulfonic acid, trifluoroacetic acid, pentafluoropropionic acid, heptane Examples include anions of fluorobutanoic acid and pentadecafluorooctanoic acid.

Examples of sulfonic acid anion compounds include methanesulfonic acid, ethanesulfonic acid, butanesulfonic acid, octanesulfonic acid, p-toluenesulfonic acid, decylbenzenesulfonic acid, dodecylbenzenesulfonic acid, tetradecylbenzenesulfonic acid, and the like. be. Specific examples of carboxylic acid anion compounds include anions of formic acid, acetic acid, propionic acid, butanoic acid, octanoic acid, decanoic acid, benzoic acid, and salicylic acid. Examples of inorganic acid anion compounds include, for example, Examples include perchlorate anion, nitrate anion, sulfate anion, phosphate anion, borate anion, and the like. _Specifically , _{( CH3O} ) _2O2P , _{( C2H5O} ) _2S2P , _{CH3COO , ( CF3SO2} ) _2N , _{( C2F5SO2} ) _2N , (CF ₃ SO ₂ ) ₃ C, (CF ₃ SO ₂ ) ₃ C, CF ₃ SO ₃ , PF ₆ , BF ₄ , TaF ₆ , NO ₃ , CH ₃ SO ₄ , p-CH ₃ C ₆ H ₄ SO ₄ , _C8H17SO3 , SCN, _{CH3SO3 , CH3 ( CH2} ) _{8COO ,} N(CN) _{2 , CF3 (} CF2) _{7SO3 , CF3 (} CF2) _3SO3 , I, Br, Cl, AlCl ₄ , Al ₂ Cl ₇ and the like. In particular, it is preferable that the structure of the anion component is a structure containing fluorine or phosphorus in order to effectively develop the epoxy ring-opening. _A particularly preferred anionic component structure is that of _{( C2H5O} ) _{2S2P , CF3SO3 , CF3SO2} .

Further examples of preferred anionic compounds include dicyanamides, halogens, thiocyanates, alkylphosphorothioate compounds such as alkylphosphates, alkylphosphorodithioates, amino acids, etc. Among these, alkylphosphorothionate compounds are Especially preferred.

Specific examples of the alkylphosphonium salt (E) include the following.
trimethylhexylphosphonium bis(trifluoromethylsulfonyl)imide, trimethylhexylphosphonium bis(fluorosulfonyl)imide, trimethylhexylphosphonium dicyanamide, trimethyloctylphosphonium bis(trifluoromethylsulfonyl)imide, trimethyloctylphosphonium bis(fluoro sulfonyl) imide, trimethyloctylphosphonium dicyanamide

Triethylbutylphosphonium bis(trifluoromethylsulfonyl)imide, Triethylbutylphosphonium bis(fluorosulfonyl)imide, Triethylbutylphosphonium dicyanamide Triethylpentylphosphonium bis(trifluoromethylsulfonyl)imide, Triethylpentylphosphonium bis(fluorosulfonyl) ) imide, triethylpentylphosphonium dicyanamide

Triethyloctylphosphonium chloride, Triethyloctylphosphonium tetrafluoroborate, Triethyloctylphosphonium hexafluorophosphate, Triethyloctylphosphonium trifluoromethanesulfonate, Triethyloctylphosphonium methanesulfonate, Triethyloctylphosphonium trifluoroacetate, Triethyloctylphosphonium bis (trifluoromethylsulfonyl)imide, triethyloctylphosphonium bis(fluorosulfonyl)imide, triethyloctylphosphonium dicyanamide, triethyloctylphosphonium thiocyanate, triethyloctylphosphonium dimethyl phosphate

triethyldodecylphosphonium chloride, triethyldodecylphosphonium tetrafluoroborate, triethyldodecylphosphonium trifluoromethanesulfonate, triethyldodecylphosphonium bis(trifluoromethylsulfonyl)imide, triethyldodecylphosphonium bis(fluorosulfonyl)imide, triethyldodecylphosphonium Dicyanamide

Tributylmethylphosphonium chloride, tributylmethylphosphonium tetrafluoroborate, tributylmethylphosphonium trifluoromethanesulfonate, tributylmethylphosphonium bis(trifluoromethylsulfonyl)imide, tributylmethylphosphonium bis(fluorosulfonyl)imide, tributylmethylphosphonium Dicyanamide, tributylmethylphosphonium dimethyl phosphate

Tetrabutylphosphonium dimethyl phosphate, Tetrabutylphosphonium diethylphosphorodithioate, Tetrabutylphosphonium amino acid salt

tributyloctylphosphonium tetrafluoroborate, tributyloctylphosphonium trifluoromethanesulfonate, tributyloctylphosphonium methanesulfonate, tributyloctylphosphonium trifluoroacetate, tributyloctylphosphonium bis(trifluoromethylsulfonyl)imide, tributyloctylphosphonium bis ( fluorosulfonyl)imide, tributyloctylphosphonium dicyanamide, tributyloctylphosphonium thiocyanate, tributyloctylphosphonium dimethyl phosphate

Tributyldodecylphosphonium tetrafluoroborate, Tributyldodecylphosphonium trifluoromethanesulfonate, Tributyldodecylphosphonium bis(trifluoromethylsulfonyl)imide, Tributyldodecylphosphonium bis(fluorosulfonyl)imide, Tributyldodecylphosphonium dicyanamide

tributylhexadecylphosphonium trifluoromethanesulfonate, tributylhexadecylphosphonium bis(trifluoromethylsulfonyl)imide, tributylhexadecylphosphonium bis(fluorosulfonyl)imide, tributylhexadecylphosphonium dicyanamide

trihexylmethylphosphonium tetrafluoroborate, trihexylmethylphosphonium trifluoromethanesulfonate, trihexylmethylphosphonium bis(trifluoromethylsulfonyl)imide, trihexylmethylphosphonium bis(fluorosulfonyl)imide, trihexylmethylphosphonium thiocyanate , trihexylmethylphosphonium/dimethyl phosphate, trihexylmethylphosphonium/trifluoroacetate, trihexylmethylphosphonium/dicyanamide

trihexyltetradecylphosphonium tetrafluoroborate, trihexyltetradecylphosphonium trifluoromethanesulfonate, trihexyltetradecylphosphonium bis(trifluoromethylsulfonyl)imide, trihexyltetradecylphosphonium bis(fluorosulfonyl)imide, trihexyl Tetradecylphosphonium thiocyanate, trihexyltetradecylphosphonium dimethyl phosphate, trihexyltetradecylphosphonium trifluoroacetate, trihexyltetradecylphosphonium dicyanamide

trioctylmethylphosphonium tetrafluoroborate, trioctylmethylphosphonium trifluoromethanesulfonate, trioctylmethylphosphonium bis(trifluoromethylsulfonyl)imide, trioctylmethylphosphonium bis(fluorosulfonyl)imide, trioctylmethylphosphonium thiocyanate , trioctylmethylphosphonium dimethyl phosphate, trioctylmethylphosphonium trifluoroacetate, trioctylmethylphosphonium dicyanamide

trioctylethylphosphonium tetrafluoroborate, trioctylethylphosphonium trifluoromethanesulfonate, trioctylethylphosphonium bis(trifluoromethylsulfonyl)imide, trioctylethylphosphonium bis(fluorosulfonyl)imide, trioctylethylphosphonium thiocyanate , trioctylethylphosphonium dimethyl phosphate, trioctylethylphosphonium trifluoroacetate, trioctylethylphosphonium dicyanamide

The content of the alkylphosphonium salt (E) is 0.01 to 2 parts by mass with respect to a total of 100 parts by mass of the polycarbonate resin (A) and the styrenic resin (B). By combining with the epoxy compound (C) in a content within such a range, it is possible to obtain a resin composition free from the problem of odor. Even if the content exceeds 2 parts by mass, there is no particular problem in terms of physical properties, but from the viewpoint of economic costs, 2 parts by mass or less is sufficient. If the content is less than 0.01 parts by mass, the odor prevention effect tends to be insufficient. The content of the alkylphosphonium salt (E) is preferably 0.05 parts by mass or more, more preferably 0.07 parts by mass or more, and is preferably 1.5 parts by mass or less, more preferably 1.3 parts by mass. parts or less, more preferably 1.0 parts by mass or less.

[Antioxidants, stabilizers]
The polycarbonate resin composition of the present invention preferably contains an antioxidant and a stabilizer, preferably a phenol-based antioxidant and a phosphorus-based stabilizer.

<Phenolic antioxidant>
Examples of phenolic antioxidants include hindered phenolic antioxidants. Specific examples 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-hydroxyphenyl)propionamide], 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″-(mesitylene-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, 2-[1-(2-hydroxy-3,5-di-tert-pentylphenyl)ethyl]-4,6-di-tert-pentylphenyl acrylate and the like.

Among them, pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], stearyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, Octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate is preferred. Specific examples of such phenolic antioxidants include, for example, "Irganox 1010" and "Irganox 1076" manufactured by BASF, "ADEKA STAB AO-50" and "ADEKA STAB AO-60" manufactured by ADEKA. is mentioned.
One type of phenolic antioxidant may be contained, or two or more types may be contained in any combination and ratio.

The content of the phenolic antioxidant is usually 0.001 parts by mass or more, preferably 0.01 parts by mass or more, with respect to a total of 100 parts by mass of the polycarbonate resin (A) and the styrene resin (B), Also, it is usually 1 part by mass or less, preferably 0.5 parts by mass or less. If the content of the phenolic antioxidant is less than the lower limit of the range, the effect as a phenolic antioxidant may be insufficient, and the content of the phenolic antioxidant is the upper limit of the range. If the value is exceeded, the effect may reach a plateau and become uneconomical.

<Phosphorus stabilizer>
Any known phosphorus stabilizer can be used. Specific examples include phosphorus oxo acids such as phosphoric acid, phosphonic acid, phosphorous acid, phosphinic acid, and polyphosphoric acid; acid pyrophosphate metal salts such as sodium acid pyrophosphate, potassium acid pyrophosphate, and calcium acid pyrophosphate; phosphoric acid; phosphates of Group 1 or Group 2B metals such as potassium, sodium phosphate, cesium phosphate, zinc phosphate; Especially preferred.

Examples of organic phosphite compounds include triphenylphosphite, tris(monononylphenyl)phosphite, tris(monononyl/dinonylphenyl)phosphite, tris(2,4-di-tert-butylphenyl)phosphite, monooctyl Diphenylphosphite, dioctylmonophenylphosphite, monodecyldiphenylphosphite, didecylmonophenylphosphite, tridecylphosphite, trilaurylphosphite, tristearylphosphite, 2,2-methylenebis(4,6-di- tert-butylphenyl)octyl phosphite and the like.
Specific examples of such organic phosphite compounds include, for example, "ADEKA STAB 1178", "ADEKA STAB 2112", and "ADEKA STAB HP-10" manufactured by ADEKA Corporation, "JP-351" manufactured by Johoku Chemical Industry Co., Ltd., "JP-360","JP-3CP", and "Irgafos 168" manufactured by BASF.
One type of phosphorus-based stabilizer may be contained, or two or more types may be contained in any combination and ratio.

The content of the phosphorus stabilizer is usually 0.001 parts by mass or more, preferably 0.01 parts by mass or more, more preferably 100 parts by mass in total of the polycarbonate resin (A) and the styrene resin (B). It is 0.03 parts by mass or more, and usually 1 part by mass or less, preferably 0.7 parts by mass or less, and more preferably 0.5 parts by mass or less. If the content of the phosphorus stabilizer is less than the lower limit of the range, the thermal stabilization effect may be insufficient, and if the content of the phosphorus stabilizer exceeds the upper limit of the range, the effect may hit a plateau and become uneconomical.

[Release agent]
The polycarbonate resin composition of the present invention preferably contains a release agent.
As the release agent, at least one compound selected from the group consisting of 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-based silicone oils. It is preferably mentioned.

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

As the aliphatic carboxylic acid in the ester of aliphatic carboxylic acid and alcohol, the same aliphatic carboxylic acid as mentioned above can be used. On the other hand, alcohols include saturated or unsaturated monohydric or polyhydric alcohols. These alcohols may have substituents such as fluorine atoms and aryl groups. Among these, monohydric or polyhydric saturated alcohols having 30 or less carbon atoms are preferred, and saturated monohydric or polyhydric alcohols having 30 or less carbon atoms are more preferred. Here, the term "aliphatic" also includes alicyclic compounds. 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 containing myricyl palmitate as a main component), stearyl stearate, behenyl behenate, stearyl behenate, glycerin monopalmitate, glycerin monostea glycerin distearate, glycerin tristearate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate, pentaerythritol tetrastearate and the like.

Aliphatic hydrocarbons 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 oligomers having 3 to 12 carbon atoms. Here, the aliphatic hydrocarbons also include alicyclic hydrocarbons. Moreover, these hydrocarbon compounds may be partially oxidized. Among these, paraffin wax, polyethylene wax, or partial oxides of polyethylene wax are preferred, and paraffin wax and polyethylene wax are more preferred. The number average molecular weight is preferably 200-5000. These aliphatic hydrocarbons may be a single substance or a mixture of substances having various constituents and molecular weights, as long as the main component is within the above range.

Examples of polysiloxane-based silicone oils include dimethylsilicone oil, phenylmethylsilicone oil, diphenylsilicone oil, and fluorinated alkylsilicone. Two or more of these may be used in combination.

When a release agent is used, it is usually 0.05 to 2 parts by mass, preferably 0.1 to 1 part by mass, per 100 parts by mass of the polycarbonate resin (A) and the styrene resin (B). If the content of the release agent is at least the above lower limit, the effect of improving the release property can be sufficiently obtained, and if it is at most the above upper limit, the hydrolysis resistance is reduced due to excessive compounding of the release agent, and the injection Problems such as mold contamination during molding can be prevented.

[Other ingredients]
If necessary, the polycarbonate resin composition of the present invention may contain other components in addition to those mentioned above, as long as the desired physical properties are not significantly impaired. Examples of other components include resins other than those mentioned above and various resin additives. In addition, 1 type may be contained and 2 or more types may contain other components by arbitrary combinations and a ratio.

<Other resins>
Other resins include, for example, thermoplastic polyester resins such as polyethylene terephthalate resin, polytrimethylene terephthalate, and polybutylene terephthalate resin; polyolefin resins such as polyethylene resin and polypropylene resin; polyamide resin; polyimide resin; polyetherimide resin; Resin; polyphenylene ether resin; polyphenylene sulfide resin; polysulfone resin;
In addition, one type of other resin may be contained, or two or more types may be contained in any combination and ratio.

However, when containing other resins, the content is preferably 20 parts by mass or less with respect to a total of 100 parts by mass of the polycarbonate resin (A) and the styrene resin (B), and 10 parts by mass or less More preferably, it is 5 parts by mass or less, and particularly preferably 3 parts by mass or less.

<Resin additive>
Examples of resin additives include flame retardants, dyes and pigments (including carbon black), ultraviolet absorbers, antistatic agents, antifog agents, antiblocking agents, fluidity modifiers, plasticizers, dispersants, antibacterial agents, and the like. is mentioned. One resin additive may be contained, or two or more resin additives may be contained in any combination and ratio.

[Production of Polycarbonate Resin Composition]
The method for producing the polycarbonate resin composition of the present invention can widely adopt a known method for producing a polycarbonate resin composition, and the essential components (A) to (E) described above, and other ingredients that are blended as necessary. The components are premixed using various mixers such as tumblers and Henschel mixers, and then mixed with mixers such as Banbury mixers, rolls, Brabenders, single-screw extruders, twin-screw extruders, kneaders, and more preferably two vented mixers. A method of melt-kneading with a screw extruder can be mentioned. The melt-kneading temperature is not particularly limited, but is usually in the range of 240 to 320°C.

[Production of polycarbonate resin composition pellets]
As a method for producing pellets of the polycarbonate resin composition of the present invention, the following method is preferred.
That is, each component of the polycarbonate resin composition is melt-kneaded in a vented twin-screw extruder, and then the strand-shaped molten resin extruded from the extruder outlet is cooled in water in a cooling water tank. The water quality of the cooling water tank preferably satisfies the following conditions (1) and (2).
(1) Total organic carbon content (TOC) is 0.01 mg/l to 1.0 mg/l
(2) Electrical conductivity (EC) is 0.1 μS/cm to 10 μS/cm

The above conditions (1) and (2) were determined by measuring the TOC and EC after treating 20 kg of strands of the resin composition in a cooling water tank of 0.12 m ³ with a water volume of 40 liters/hour. The electrical conductivity is measured using a conductivity meter at a measurement temperature of 25°C.

The electrical conductivity of the raw water used in the cooling water tank is preferably 1 µS/cm or less, more preferably 0.7 µS/cm or less, still more preferably 0.5 µS/cm or less, and particularly preferably 0.3 µS/cm or less.
As the strands are cooled, the water stored in the cooling water tank increases in TOC and EC. 05 mg/l to 0.5 mg/l, with an EC ranging from 0.1 μS/cm to 10 μS/cm, preferably from 0.5 μS/cm to 5 μS/cm.

The cooled strands are sent to a pelletizer by take-up rollers and cut into pellets.

[Molded body]
The polycarbonate resin composition of the present invention can be molded by various molding methods such as injection molding, ultra-high-speed injection molding, injection compression molding, two-color molding, gas-assisted hollow molding, and molding using an insulated mold. method, molding method using rapid heating mold, 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 , lamination molding, press molding, or the like to form a molded product.

Examples of molded articles include electrical and electronic equipment, OA equipment, information terminal equipment, machine parts, household appliances, vehicle parts, construction parts, various containers, parts of lighting equipment and the like. Among these, it is particularly suitable for various parts of vehicle parts, electrical and electronic equipment, and OA equipment.

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to Examples. However, the present invention is not limited to the following examples, and can be arbitrarily modified without departing from the gist of the present invention.

Each component used in the following examples and comparative examples is as shown in Table 1 below.

(Examples 1 , 2, 4, Reference Examples 3 , 5, Comparative Examples 1 to 5)
Each component shown in Table 1 above was blended in the ratio (all parts by mass) shown in Table 2 below, mixed in a tumbler for 20 minutes, and then a twin-screw extruder manufactured by Toshiba Machine Co., Ltd. (TEM37BS) equipped with a cylinder. L/D = 40.5), melt-kneaded under the conditions of a screw rotation speed of 400 rpm, a discharge rate of 40 kg/hour, and a barrel temperature of 260°C, and extruded into a strand shape. and pelletized using a pelletizer to obtain pellets of a polycarbonate resin composition.
The total organic carbon content (TOC) of the industrial water introduced into the cooling water tank as cooling water during pelletization was 1.2 mg/l, and the electrical conductivity (EC) was 215 μS/cm. The volume of the cooling water tank was 0.12 m ³ , and water flowed at a rate of 40 liters/hour while overflowing, and the operation was continued until 20 kg of strand was treated. Table 2 shows the TOC and EC of the water tank after operation.

The polycarbonate resin composition pellets obtained above were evaluated as follows.
[Damp heat resistance]
The wet heat resistance was evaluated by the rate of increase in the MFR value of the resin composition pellets before and after the wet heat treatment. The pellets obtained by the above-described manufacturing method were subjected to wet heat treatment for 200 hours in an environment with a temperature of 90 ° C. and a relative humidity of 95%, and the MFR before and after the wet heat treatment (cylinder temperature 260 ° C., load 2.16 kg ) was measured (unit: g/10 minutes), and the MFR increase rate after wet heat treatment (unit: %) was determined by the following formula.
MFR increase rate after wet heat treatment (%) =
{(MFR after wet heat treatment) / (MFR before wet heat treatment)} × 100-100 (%)
It means that the smaller the MFR increase rate (%) after wet heat treatment, the better the wet heat resistance.

[Flow value (Q value)]
The flow value (Q value) of the resin composition pellets was measured using a CFT-500A flow tester manufactured by Shimadzu Corporation, in accordance with JIS (1999 version) K7210 Annex C, at 260 ° C. and 160 kgf / cm ² . The measurement was performed using an orifice of 1 mmφ×10 mm under the conditions with a preheating time of 7 minutes.
The Q value is an index of melt viscosity, and unlike MFR (melt flow rate), represents the melt viscosity in a high shear rate region close to actual injection molding. A higher Q value indicates better fluidity and higher moldability.

[Viscosity average molecular weight of THF soluble part]
After concentrating and solidifying the THF (tetrahydrofuran) soluble portion of the resin composition pellets, it is dissolved in methylene chloride and using an Ubbelohde viscometer (manufactured by Moritomo Rika Kogyo Co., Ltd.), the intrinsic viscosity (intrinsic viscosity) of the methylene chloride solution at 20 ° C. [η] (unit: dL/g) was determined and calculated from Schnell's viscosity formula, η=1.23×10 ⁻⁴ Mv ^0.83 .
The numerical value of Comparative Example 1 was used as an index for the presence or absence of decomposition, and it was determined that decomposition had occurred when the value decreased.

[Evaluation of mold adhesion (mold deposit)]
The obtained resin composition pellets are continuously molded for 100 shots at a molding temperature of 260° C. using an SE7M injection molding machine manufactured by Sumitomo Heavy Industries, Ltd. using a drop-shaped mold having the shape shown in FIG. The presence or absence of deposits on the post-mold was observed and evaluated according to the following criteria.
◯: Few deposits on the mold.
Δ: Deposits on the mold are slightly observed.
x: A lot of deposits on the mold.
The drop-shaped mold shown in FIG. 1 is a mold designed so that the resin composition is introduced from the gate G and the generated gas is likely to accumulate in the tip P portion. The gate G has a width of 1 mm and a thickness of 1 mm. In FIG. 1, the width h1 is 14.5 mm, the length h2 is 7 mm, the length h3 is 27 mm, and the thickness of the molded portion is 3 mm.

[Charpy impact value with notch (unit: kJ/m ² )]
After drying the resin composition pellets at 100 ° C. for 5 hours or more, using a J55-60H injection molding machine manufactured by Japan Steel Works, Ltd., the cylinder temperature is 260 ° C., the mold temperature is 60 ° C., the injection time is 2.0 sec, Injection molding is performed under the conditions of a molding cycle of 40 seconds to prepare an ISO multi-purpose test piece (4 mm thick), cut into a predetermined shape by cutting based on the ISO179-1 standard, and at 23 ° C. based on the ISO179-2 standard. Charpy impact test (with notch) was performed to determine the impact resistance value.

[Color tone]
After drying the resin composition pellets at 100 ° C. for 5 hours or more, using a NEX80-9E injection molding machine manufactured by Nissei Plastic Industry Co., Ltd., a cylinder temperature of 260 ° C., a mold temperature of 60 ° C., and a molding cycle of 50 seconds. A flat plate test piece (2 mm thick) was prepared, and L ^* and YI were measured using a spectral color difference meter SE6000 manufactured by Nippon Denshoku Industries Co., Ltd.
The larger the value of L ^* , the stronger the whiteness, and the larger the value of YI, the stronger the yellowness.

[Odor evaluation]
1) Pellet Odor The resin composition pellets were placed in a 100 ml glass bottle and sealed, and after 24 hours at room temperature, the odor intensity was evaluated and graded by five panelists.
2) Molded product odor After drying the resin composition pellets at 100 ° C. for 5 hours or more, using a NEX80-9E injection molding machine manufactured by Nissei Plastic Industry Co., Ltd., molding at a cylinder temperature of 260 ° C. and a mold temperature of 80 ° C. Injection molding was performed at a cycle of 30 seconds to prepare a 100 mm square plate (thickness of 3 mm), which was subjected to the recommendations of the Federation of Automobile Manufacturers (VDA) dated October 1992 regarding the measurement of odor characteristics of materials for automotive interior parts (odor test. VDA 270 C3).
The odor intensity was rated according to the following VDA 270 for both pellets and molded articles.
1: Odor is not perceived at all.
2: Perceivable but not unpleasant.
3: Clearly perceived, but still not unpleasant.
4: It has an unpleasant smell.
5: Very unpleasant odor.
6: I can't stand it.

The above evaluation results are shown in Table 2 below.

(Examples 6 and 7)
Example 1 and Example 4 except that industrial water was treated with an activated carbon adsorption device and an ion exchange resin device (TOC and EC after treatment are as shown in Table 3) and used as cooling water for a cooling water tank. In the same manner as in Example 1 and Example 4, pellets of the resin composition were obtained. The TOC and EC of the aquarium after processing 20 kg strands are shown in Table 3.
The odor intensity of the obtained resin composition pellets and molded articles thereof is shown in Table 3 below.

The polycarbonate resin composition of the present invention, while maintaining the excellent properties of the polycarbonate/styrene resin alloy, has no odor problem and is excellent in color and mold deposit resistance. , machine parts, home electric appliances, vehicle parts, building materials, various containers, lighting equipment, etc., and some of them have high industrial applicability.

Claims (6)

Polycarbonate resin (A) 50% by mass to 95% by mass, styrene resin (B) less than 50% by mass and 5% by mass or more to 100 parts by mass of the resin component, alicyclic epoxy compound (C) 0.01 to 3 parts by mass, further, 0.005 to 2 parts by mass of a higher fatty acid metal salt (D) having 10 to 22 carbon atoms, or 0.005 to 2 parts by mass of a higher fatty acid metal salt (D) having 10 to 22 carbon atoms and an alkyl A polycarbonate resin composition characterized by containing 0.01 to 2 parts by mass of a phosphonium salt (E). 2. The polycarbonate resin composition according to claim 1, wherein the styrene resin (B) is an emulsion-polymerized styrene resin. 3. The polycarbonate resin composition according to claim 1, wherein the styrene resin (B) comprises an aromatic vinyl-diene-vinyl cyanide copolymer. 4. The polycarbonate resin composition according to any one of claims 1 to 3 , wherein the metal of the higher fatty acid metal salt (D) is at least one selected from zinc, magnesium, barium and calcium. The polycarbonate resin composition according to any one of claims 1 to 4 , wherein the alkylphosphonium salt is a butylphosphonium salt. A molded article of the polycarbonate resin composition according to any one of claims 1 to 5 .

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