Polycarbonate resin composition and molded body

Abstract

To provide a polycarbonate-based resin composition by which a molding with improved brightness difference between a highlight part and a shade part in a metallic appearance can be obtained while reduction of impact resistance is suppressed.SOLUTION: [1] A polycarbonate-based resin composition contains polycarbonate-based resin (S) that consists of polycarbonate-polyorganosiloxane copolymer (A) including a specific polycarbonate block (A-1) and a specific polyorganosiloxane block (A-2), and specific polycarbonate resin (A'), 0.10 pt. mass or more and 0.30 pt. mass or less of metal aluminum particle (B) and 0.10 pt. mass or more and 0.50 pt. mass or less of ultraviolet light absorber (C) with respect to 100 pts. mass of polycarbonate-based resin (S), where the copolymer (A) includes the polyorganosiloxane block (A-2) by 5.0 mass% or more and 7.0 mass% or less, and has specific viscosity-average molecular weight, the polycarbonate-based resin (S) includes the copolymer (A) by 55 mass% or more and 70 mass% or less, includes the polyorganosiloxane block (A-2) by 3.0 mass% or more and 4.0 mass% or less, and has specific viscosity-average molecular weight. [2] A molding consists of the polycarbonate-based resin composition.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a polycarbonate resin composition and a molded article. [Background technology]

[0002] Molded articles made of polycarbonate-based resin compositions (hereinafter also referred to as "polycarbonate-based resin molded articles" or "molded articles") have a good balance of, for example, transparency, heat resistance, and mechanical properties, and are therefore widely used as industrial transparent materials in the fields of electricity and electronics, machinery, and automobiles, and as optical materials such as lenses and optical disks. Furthermore, in order to improve the design of the molded product, attempts have been made to improve the product image by adding glossy particles or the like to the polycarbonate-based resin composition. For example, by adding glossy particles or the like to the polycarbonate-based resin composition, a metallic appearance can be obtained.

[0003] Techniques relating to polycarbonate resin compositions capable of imparting a metallic appearance include those described in, for example, Patent Documents 1 and 2.

[0004] Patent Document 1 describes that a polycarbonate resin composition containing 100 parts by mass of a glass fiber-containing resin component consisting of (A) 60 to 90% by mass of an aromatic polycarbonate resin, (B) 5 to 20% by mass of glass fiber having a refractive index difference of 0.02 or less from that of the aromatic polycarbonate resin, and (C) 5 to 25% by mass of a polymethyl methacrylate resin, (D) 0.005 to 1.5 parts by mass of (D-1) glossy particles having an average particle size of 10 μm or more and less than 60 μm, (D-2) 0.005 to 5 parts by mass of glossy particles having an average particle size of 60 to 300 μm, and (E) 0.05 to 0.4 parts by mass of titanium oxide having an average particle size of 0.05 to 3 μm, reduces the visibility of the fused weld line, makes it impossible to visually recognize the difference in brightness between the left and right of the weld line, and gives a molded article having a good metallic appearance or galaxy appearance, and has excellent heat resistance and mechanical properties.

[0005] Patent Document 2 describes a polycarbonate-polyorganosiloxane copolymer (A) containing a specific polycarbonate block (A-1) and a specific polyorganosiloxane block (A-2), a polycarbonate resin (S) composed of a specific polycarbonate resin (A'), and 0.01 to 0.05 parts by mass of metallic aluminum particles (B) and 0.1 to 0.5 parts by mass of an ultraviolet absorber (C) per 100 parts by mass of the polycarbonate resin (S), It is described that the polycarbonate-based resin composition (A) contains 5 to 7% by mass of a polyorganosiloxane block (A-2) and has a specific viscosity average molecular weight, and the polycarbonate-based resin (S) contains 55 to 70% by mass of the copolymer (A) and 3 to 4% by mass of a polyorganosiloxane block (A-2) and has a specific viscosity average molecular weight, and is capable of suppressing appearance defects such as black lines that may occur when aluminum particles are blended therein, and is also excellent in impact resistance. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2011-94070 A [Patent Document 2] JP 2020-84005 A Summary of the Invention [Problem to be solved by the invention]

[0007] In recent years, in order to further improve the design of polycarbonate-based resin molded articles, there has been a demand for improving the difference in luminance between highlight and shade areas in the metallic appearance while suppressing a decrease in impact resistance.

[0008] The present invention has been made in consideration of the above circumstances, and provides a polycarbonate-based resin composition that can give a molded article having an improved luminance difference between highlight and shade parts in a metallic appearance while suppressing a decrease in impact resistance. [Means for solving the problem]

[0009] The present inventors have found that a polycarbonate-based resin composition containing a polycarbonate-based resin containing specific copolymerization units, a specific amount of metallic aluminum particles, and a specific amount of an ultraviolet absorber can provide a molded article that has an improved difference in luminance between highlight and shade portions in a metallic appearance while suppressing a decrease in impact resistance.

[0010] That is, according to the present invention, there are provided the following polycarbonate resin composition and molded article.

[0011] [1] A polycarbonate-based resin (S) comprising a polycarbonate-polyorganosiloxane copolymer (A) including a polycarbonate block (A-1) having a repeating unit represented by the following general formula (I) and a polyorganosiloxane block (A-2) having a repeating unit represented by the following general formula (II) and having an average repeat number of 85 to 95, and a polycarbonate resin (A') having a repeating unit represented by the following general formula (III), The polycarbonate-based resin (S) contains 0.10 parts by mass or more and 0.30 parts by mass or less of metal aluminum particles (B) and 0.10 parts by mass or more and 0.50 parts by mass or less of an ultraviolet absorber (C) relative to 100 parts by mass of the polycarbonate-based resin (S), the polycarbonate-polyorganosiloxane copolymer (A) contains the polyorganosiloxane block (A-2) in an amount of 5.0% by mass or more and 7.0% by mass or less and has a viscosity average molecular weight of 16,000 or more and 18,000 or less; The polycarbonate-based resin (S) is a polycarbonate-based resin composition comprising the polycarbonate-polyorganosiloxane copolymer (A) in an amount of 55% by mass or more and 70% by mass or less, the polyorganosiloxane block (A-2) in an amount of 3.0% by mass or more and 4.0% by mass or less, and having a viscosity average molecular weight of 15,000 or more and 17,000 or less. [ka] [In the formula, R 1 and R 2 each independently represents a halogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms. X represents a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, a fluorenediyl group, an arylalkylene group having 7 to 15 carbon atoms, an arylalkylidene group having 7 to 15 carbon atoms, -S-, -SO-, -SO 2 R represents -, -O- or -CO-. 3 and R 4 each independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms. a and b each independently represent an integer of 0 to 4.] [ka] [In the formula, R 30 and R 31 each independently represents a halogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms. X' represents a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, -S-, -SO-, -SO 2 represents -, -O- or -CO-; and d and e each independently represent an integer of 0 to 4. [2] The polycarbonate-based resin composition according to the above [1], wherein the content of the metallic aluminum particles (B) is 0.20 parts by mass or more and 0.50 parts by mass or less per 100 parts by mass of the polycarbonate-polyorganosiloxane copolymer (A). [3] The polycarbonate-based resin composition according to the above [1] or [2], wherein the content of the polymethyl methacrylate resin is 5.0 parts by mass or less per 100 parts by mass of the polycarbonate-based resin (S). [4] The polycarbonate-based resin composition according to any one of the above [1] to [3], wherein the content of titanium oxide is 0.05 parts by mass or less per 100 parts by mass of the polycarbonate-based resin (S). [5] The polycarbonate-based resin composition according to any one of the above [1] to [4], wherein the content of the glass fiber is 5.0 parts by mass or less based on 100 parts by mass of the polycarbonate-based resin (S). [6] The polycarbonate-based resin composition according to any one of the above [1] to [5], wherein the content of the glossy particles other than the metallic aluminum particles (B) is 0.005 parts by mass or less per 100 parts by mass of the polycarbonate-based resin (S). [7] A molded article made of the polycarbonate resin composition according to any one of the above [1] to [6]. [8] The molded article according to [7] above, which is an automobile interior part. Effect of the Invention

[0012] According to the present invention, it is possible to provide a polycarbonate-based resin composition which can give a molded article having an improved difference in luminance between highlight portions and shade portions in a metallic appearance while suppressing a decrease in impact resistance. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The polycarbonate resin composition and its molded article of the present invention will be described in detail below. In this specification, the preferred definitions can be arbitrarily adopted, and it can be said that a combination of preferred definitions is more preferred. In this specification, the description "XX to YY" means "XX or more and YY or less."

[0014] 1. Polycarbonate resin composition The polycarbonate-based resin composition of the present invention comprises a polycarbonate-polyorganosiloxane copolymer (A) including a polycarbonate block (A-1) having a repeating unit represented by the following general formula (I) and a polyorganosiloxane block (A-2) having a repeating unit represented by the following general formula (II) and having an average repeat number of 85 to 95, and a polycarbonate resin (A') having a repeating unit represented by the following general formula (III), and a polycarbonate resin (S) including 0.10 parts by mass or more and 0.30 parts by mass or less of metallic aluminum per 100 parts by mass of the polycarbonate-based resin (S). The polycarbonate-polyorganosiloxane copolymer (A) contains 5.0% by mass or more and 7.0% by mass or less of polyorganosiloxane blocks (A-2) and has a viscosity average molecular weight of 16,000 or more and 18,000 or less, and the polycarbonate-based resin (S) contains 55% by mass or more and 70% by mass or less of polycarbonate-polyorganosiloxane copolymer (A), contains 3.0% by mass or more and 4.0% by mass or less of polyorganosiloxane blocks (A-2), and has a viscosity average molecular weight of 15,000 or more and 17,000 or less. According to the polycarbonate resin composition of the present invention, it is possible to obtain a molded article having an improved difference in luminance between highlight and shade portions in a metallic appearance while suppressing a decrease in impact resistance. In this specification, the term "highlight area" refers to an area that looks bright due to specular reflection of light, and the term "shade area" refers to an area that looks dark due to non-reflection of light. The luminance difference between the highlight area and the shade area can be quantitatively evaluated, for example, by the luminous reflectance Y described in the examples below.

[0015] [Polycarbonate resin (S)] The polycarbonate resin (S) comprises a polycarbonate-polyorganosiloxane copolymer (A) and a polycarbonate resin (A').

[0016] <Polycarbonate-polyorganosiloxane copolymer (A)> The polycarbonate-polyorganosiloxane copolymer (hereinafter sometimes abbreviated as "PC-POS copolymer") (A) contained in the polycarbonate resin (S) comprises a polycarbonate block (A-1) consisting of repeating units represented by the following general formula (I) and a polyorganosiloxane block (A-2) containing repeating units represented by the following general formula (II) and having an average repeat number of 85 or more and 95 or less.

[0017] [ka] [In the formula, R 1 and R 2 each independently represents a halogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms. X represents a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, a fluorenediyl group, an arylalkylene group having 7 to 15 carbon atoms, an arylalkylidene group having 7 to 15 carbon atoms, -S-, -SO-, -SO 2 R represents -, -O- or -CO-. 3 and R 4 each independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms. a and b each independently represent an integer of 0 to 4.]

[0018] In the above general formula (I), R 1 and R 2 Examples of the halogen atom each independently represent include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom. R 1 and R 2 Examples of the alkyl groups each independently represent include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, various butyl groups (the term "various" includes linear and all branched butyl groups. The same applies hereinafter in the specification), various pentyl groups, and various hexyl groups. 1 and R 2The alkoxy groups each independently represent include, for example, those having the above-mentioned alkyl group as the alkyl group moiety. R 1 and R 2 are each independently preferably an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms, more preferably an alkyl group having 1 to 6 carbon atoms, even more preferably an alkyl group having 1 to 3 carbon atoms, and even more preferably a methyl group.

[0019] Examples of the alkylene group represented by X include a methylene group, an ethylene group, a trimethylene group, a tetramethylene group, and a hexamethylene group, and an alkylene group having 1 to 5 carbon atoms is preferred. Examples of the alkylidene group represented by X include an ethylidene group and an isopropylidene group. Examples of the cycloalkylene group represented by X include a cyclopentanediyl group, a cyclohexanediyl group, and a cyclooctanediyl group, and a cycloalkylene group having 5 to 10 carbon atoms is preferred. Examples of the cycloalkylidene group represented by X include a cyclohexylidene group, a 3,5,5-trimethylcyclohexylidene group, and a 2-adamantylidene group. A cycloalkylidene group having 5 to 10 carbon atoms is preferable, and a cycloalkylidene group having 5 to 8 carbon atoms is more preferable. Examples of the aryl moiety of the arylalkylene group represented by X include aryl groups having 6 to 14 ring carbon atoms, such as a phenyl group, a naphthyl group, a biphenyl group, and an anthryl group, and examples of the alkylene group include the alkylene groups mentioned above. Examples of the aryl moiety of the arylalkylidene group represented by X include aryl groups having 6 to 14 ring carbon atoms, such as a phenyl group, a naphthyl group, a biphenyl group, and an anthryl group, and examples of the alkylidene group include the alkylidene groups mentioned above.

[0020] a and b each independently represent an integer of 0 to 4, preferably 0 to 2, more preferably 0 or 1, and even more preferably 0. Among these, it is preferable that a and b are 0 and X is a single bond or an alkylene group having 1 to 8 carbon atoms, or that a and b are 0 and X is an alkylene group having 3 carbon atoms, particularly an isopropylidene group.

[0021] In the above general formula (II), R 3 or R 4 Examples of the halogen atom represented by the formula (I) include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom. R 3 or R 4 Examples of the alkyl group represented by the formula (I) include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, various butyl groups, various pentyl groups, and various hexyl groups. R 3 or R 4 Examples of the alkoxy group represented by the formula: wherein the alkyl group moiety is the above-mentioned alkyl group. R 3 or R 4 Examples of the aryl group represented by the formula (I) include a phenyl group and a naphthyl group. R 3 and R 4 is preferably a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms, and more preferably a methyl group.

[0022] More specifically, the polyorganosiloxane block (A-2) containing the repeating unit represented by the above general formula (II) preferably has a unit represented by any one of the following general formulas (II-I) to (II-III).

[0023] [ka] [In the formula, R 3 ~R 6 each independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms; 3 ~R6 may be the same or different. Y is -R 7 O-, -R 7 COO-, -R 7 NH-, -R 7 NR 8 -, -COO-, -S-, -R 7 COO-R 9 -O- or R 7 OR 10 The R represents —O—, and a plurality of Y's may be the same or different. 7 R represents a single bond, a linear, branched or cyclic alkylene group, an aryl-substituted alkylene group, a substituted or unsubstituted arylene group, or a diarylylene group. 8 R represents an alkyl group, an alkenyl group, an aryl group, or an aralkyl group. 9 R represents a diarylene group. 10 represents a linear, branched or cyclic alkylene group, or a diarylene group; β represents a divalent group derived from a diisocyanate compound, or a divalent group derived from a dicarboxylic acid or a dicarboxylic acid halide; n represents the average chain length of the polyorganosiloxane; n-1, p and q each represent the average repeating number of polyorganosiloxane units, and are integers of 1 or more, and the sum of p and q is n-2.]

[0024] R 3 ~R 6 Examples of the halogen atom each independently represent include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom. R 3 ~R 6 Examples of the alkyl groups each independently represent include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, various butyl groups, various pentyl groups, and various hexyl groups. R 3 ~R 6 The alkoxy groups each independently represent include, for example, those in which the alkyl group moiety is the above-mentioned alkyl group. R 3 ~R 6Examples of the aryl group that each independently represents include a phenyl group and a naphthyl group. R 3 ~R 6 is preferably a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms, and more preferably a methyl group.

[0025] Y indicates -R 7 O-, -R 7 COO-, -R 7 NH-, -R 7 NR 8 -, -R 7 COO-R 9 -O- or R 7 OR 10 R in -O- 7 The linear or branched alkylene group represented by R is an alkylene group having 1 to 8 carbon atoms, preferably 1 to 5 carbon atoms. 7 The cyclic alkylene group represented by the formula (I) is a cycloalkylene group having 5 to 15 carbon atoms, preferably 5 to 10 carbon atoms.

[0026] R 7 The aryl-substituted alkylene group represented by may have a substituent such as an alkoxy group or an alkyl group on the aromatic ring, and its specific structure can be, for example, the structure of the following general formula (i) or (ii). 7 When represents an aryl-substituted alkylene group, the alkylene group is bonded to Si.

[0027] [ka] (In the formula, c represents a positive integer, and is usually an integer of 1 to 6.)

[0028] R 7 , R 9 and R 10 The diarylene group represented by the formula (I) is a group in which two arylene groups are linked directly or via a divalent organic group, and specifically, -Ar1 -W-Ar 2 - is a group having a structure represented by Ar 1 and Ar 2 represents an arylene group, and W represents a single bond or a divalent organic group. The divalent organic group represented by W is, for example, an isopropylidene group, a methylene group, a dimethylene group, or a trimethylene group. R 7 , Ar 1 and Ar 2 Examples of the arylene group represented by the formula (1) include arylene groups having 6 to 14 ring carbon atoms, such as a phenylene group, a naphthylene group, a biphenylene group, and an anthrylene group. These arylene groups may have any substituent, such as an alkoxy group or an alkyl group.

[0029] R 8 The alkyl group represented by the formula (I) is, for example, a straight-chain or branched-chain alkyl group having 1 to 8 carbon atoms, preferably 1 to 5 carbon atoms. R 8 The alkenyl group represented by the formula (I) includes, for example, straight-chain or branched-chain alkenyl groups having 2 to 8 carbon atoms, preferably 2 to 5 carbon atoms. R 8 Examples of the aryl group represented by the formula (I) include a phenyl group and a naphthyl group. R 8 Examples of the aralkyl group represented by the formula (I) include a phenylmethyl group and a phenylethyl group. R 10 The linear, branched or cyclic alkylene group represented by R 7 is the same as:

[0030] Y is preferably -R 7 O- and R 7 is an aryl-substituted alkylene group, particularly a residue of a phenolic compound having an alkyl group, and more preferably an organic residue derived from allylphenol or an organic residue derived from eugenol. With respect to p and q in formula (II-II), it is preferable that p=q. In addition, β represents a divalent group derived from a diisocyanate compound or a divalent group derived from a dicarboxylic acid or a dicarboxylic acid halide, and examples thereof include divalent groups represented by any of the following general formulas (iii) to (vii).

[0031] [ka]

[0032] The average repeat number of the polyorganosiloxane block (A-2) in the PC-POS copolymer (A) (the number represented by n-1, p and q in the above formula) is 85 or more and 95 or less. When the average repeat number is 85 or more, the impact resistance can be improved. On the other hand, when the average repeat number is 95 or less, the transparency can be improved. From the viewpoint of obtaining higher impact resistance, the average repeat number is preferably 86 or more, more preferably 87 or more, and preferably 93 or less, more preferably 90 or less. The average repeat number is calculated by nuclear magnetic resonance (NMR) measurement.

[0033] The PC-POS copolymer (A) contains 5.0% by mass or more and 7.0% by mass or less of the polyorganosiloxane block (A-2). When the amount of polyorganosiloxane in the PC-POS copolymer (A) is within the above range, the balance between impact resistance and transparency can be improved. The content of the polyorganosiloxane block (A-2) in the PC-POS copolymer (A) is preferably 5.5% by mass or more from the viewpoint of obtaining higher impact resistance, and is preferably less than 7.0% by mass, more preferably 6.5% by mass or less from the viewpoint of obtaining higher transparency. The content is calculated by nuclear magnetic resonance (NMR) measurement.

[0034] The PC-POS copolymer (A) has a viscosity average molecular weight (Mv) of 16,000 or more and 18,000 or less. When the viscosity average molecular weight of the PC-POS copolymer (A) is within the above range, the strength of the molded product is improved, and thermal deterioration during injection molding or extrusion molding can be suppressed. The viscosity average molecular weight can be adjusted to the above range by using a molecular weight regulator (terminal terminator) or the like.

[0035] The viscosity average molecular weight of the PC-POS copolymer (A) is preferably 16,500 or more from the viewpoint of obtaining a molded article having higher strength, and is preferably less than 18,000 from the viewpoint of further suppressing thermal deterioration during molding. The viscosity average molecular weight (Mv) is a value calculated from the intrinsic viscosity [η] of a methylene chloride solution at 20° C. using the Schnell formula below.

[0036]

number

[0037] The PC-POS copolymer (A) can be produced by known production methods such as an interfacial polymerization method (phosgene method), a pyridine method, and an ester exchange method. In particular, when the interfacial polymerization method is adopted, the separation process of the organic phase containing the PC-POS copolymer (A) and the aqueous phase containing unreacted materials and catalyst residues is easy, and the organic phase containing the PC-POS copolymer (A) and the aqueous phase are easily separated in each washing process such as alkali washing, acid washing, and pure water washing. Therefore, the PC-POS copolymer (A) can be obtained efficiently. As a method for producing the PC-POS copolymer (A), for example, the method described in JP-A-2014-80462 can be referred to.

[0038] Specifically, the polycarbonate oligomer and polyorganosiloxane, which have been previously prepared as described below, are dissolved in a non-water-soluble organic solvent (such as methylene chloride), an aqueous alkaline compound solution (such as an aqueous sodium hydroxide solution) of a dihydric phenol compound (such as bisphenol A) is added, and an interfacial polycondensation reaction is carried out in the presence of a terminal terminator (monohydric phenol such as p-tert-butylphenol) using a tertiary amine (such as triethylamine) or a quaternary ammonium salt (such as trimethylbenzylammonium chloride) as a polymerization catalyst. The PC-POS copolymer (A) can also be produced by copolymerizing a polyorganosiloxane, a dihydric phenol, and phosgene, a carbonate ester, or a chloroformate.

[0039] As the polyorganosiloxane raw material, those represented by the following general formula (1), (2) and / or (3) can be used.

[0040] [ka]

[0041] In the above formula, R 3 ~R 6 , Y, β, n-1, p and q are as described above, and specific examples and preferred ones are also as described above. Z represents a hydrogen atom or a halogen atom, and multiple Z's may be the same or different.

[0042] For example, examples of the polyorganosiloxane represented by general formula (1) include compounds represented by the following general formulas (1-1) to (1-11).

[0043] [ka]

[0044] In the above general formulas (1-1) to (1-11), R 3 ~R 6 , n-1 and R 8is as defined above, and the preferred values ​​are also the same. c represents a positive integer, and is usually an integer of 1 to 6. Among these, from the viewpoint of ease of polymerization, the phenol-modified polyorganosiloxane represented by the above general formula (1-1) is preferred. From the viewpoint of ease of availability, α,ω-bis[3-(o-hydroxyphenyl)propyl]polydimethylsiloxane, which is one of the compounds represented by the above general formula (1-2), and α,ω-bis[3-(4-hydroxy-3-methoxyphenyl)propyl]polydimethylsiloxane, which is one of the compounds represented by the above general formula (1-3), are preferred.

[0045] Alternatively, the polyorganosiloxane raw material may be one having the following general formula (4):

[0046] [ka]

[0047] In the above formula, R 3 and R 4 is the same as above. The average chain length of the polyorganosiloxane block represented by the general formula (4) is (r×m), and the range of (r×m) is the same as the above n. When the above (4) is used as the polyorganosiloxane raw material, the polyorganosiloxane block (A-2) preferably has a unit represented by the following general formula (II-IV).

[0048] [ka] [R in the formula 3 , R 4 , r and m are as defined above.]

[0049] The polyorganosiloxane block (A-2) may have a structure represented by the following general formula (II-V).

[0050] [ka] [In the formula, R 18 ~R 21 R is independently a hydrogen atom or an alkyl group having 1 to 13 carbon atoms. 22 Q is an alkyl group having 1 to 6 carbon atoms, a hydrogen atom, a halogen atom, a hydroxyl group, an alkoxy group having 1 to 6 carbon atoms, or an aryl group having 6 to 14 carbon atoms. 2 is a divalent aliphatic group having 1 to 10 carbon atoms. n-1 represents the number of repeating polyorganosiloxane blocks, and the range is as described above.]

[0051] In general formula (II-V), R 18 ~R 21 Examples of the alkyl group having 1 to 13 carbon atoms that each independently represents include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, various butyl groups, various pentyl groups, various hexyl groups, various heptyl groups, various octyl groups, a 2-ethylhexyl group, various nonyl groups, various decyl groups, various undecyl groups, various dodecyl groups, and various tridecyl groups. 18 ~R 21 is preferably a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and more preferably a methyl group.

[0052] R 22 Examples of the alkyl group having 1 to 6 carbon atoms represented by R include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, various butyl groups, various pentyl groups, and various hexyl groups. 22 Examples of the halogen atom represented by R include a fluorine atom, a chlorine atom, a bromine atom, and an iodine atom. 22 Examples of the alkoxy group having 1 to 6 carbon atoms represented by R include those in which the alkyl group moiety is the above-mentioned alkyl group. 22 Examples of the aryl group having 6 to 14 carbon atoms include a phenyl group, a toluyl group, a dimethylphenyl group, and a naphthyl group. Among the above, R 22is preferably a hydrogen atom or an alkoxy group having 1 to 6 carbon atoms, more preferably a hydrogen atom or an alkoxy group having 1 to 3 carbon atoms, and even more preferably a hydrogen atom.

[0053] Q 2 The divalent aliphatic group having 1 to 10 carbon atoms represented by is preferably a linear or branched divalent saturated aliphatic group having 1 to 10 carbon atoms. The number of carbon atoms in the saturated aliphatic group is preferably 1 to 8, more preferably 2 to 6, even more preferably 3 to 6, and still more preferably 4 to 6. The repeat number n-1 is as described above.

[0054] A preferred embodiment of the structural unit (II-V) is a structure represented by the following formula (II-VI).

[0055] [ka] [In the formula, n-1 is the same as above.]

[0056] The polyorganosiloxane block (A-2) represented by the above general formula (II-V) or (II-VI) can be obtained by using a polyorganosiloxane raw material represented by the following general formula (5) or (6).

[0057] [ka] [In the formula, R 18 ~R 22 , Q 2 , and n-1 are as defined above.]

[0058] [ka] [In the formula, n-1 is as defined above.]

[0059] The method for producing the polyorganosiloxane is not particularly limited.For example, according to the method described in JP-A-11-217390, cyclotrisiloxane and disiloxane are reacted in the presence of an acid catalyst to synthesize α,ω-dihydrogenorganopentasiloxane, and then, in the presence of a catalyst for hydrosilylation reaction, the α,ω-dihydrogenorganopentasiloxane is subjected to an addition reaction with a phenolic compound (e.g., 2-allylphenol, 4-allylphenol, eugenol, 2-propenylphenol, etc.), etc., to obtain crude polyorganosiloxane. According to the method described in Japanese Patent No. 2662310, octamethylcyclotetrasiloxane and tetramethyldisiloxane are reacted in the presence of sulfuric acid (acid catalyst), and the resulting α,ω-dihydrogenorganopolysiloxane is subjected to an addition reaction with a phenolic compound or the like in the presence of a hydrosilylation catalyst in the same manner as described above to obtain a crude polyorganosiloxane. The α,ω-dihydrogenorganopolysiloxane may be used by appropriately adjusting its chain length n depending on the polymerization conditions, or a commercially available α,ω-dihydrogenorganopolysiloxane may be used. Specifically, the hydrosilylation catalyst described in Japanese Patent Publication No. 2016-098292 may be used.

[0060] Polycarbonate oligomers can be produced by reacting a dihydric phenol with a carbonate precursor such as phosgene or triphosgene in an organic solvent such as methylene chloride, chlorobenzene, chloroform, etc. When producing polycarbonate oligomers using the transesterification method, they can also be produced by reacting a dihydric phenol with a carbonate precursor such as diphenyl carbonate.

[0061] As the dihydric phenol, it is preferable to use a dihydric phenol represented by the following general formula (viii).

[0062] [ka] [In the formula, R1 , R 2 , a, b and X are as defined above.]

[0063] Examples of the dihydric phenol represented by the general formula (viii) include bis(hydroxyphenyl)alkanes such as 2,2-bis(4-hydroxyphenyl)propane [bisphenol A], bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxyphenyl)ethane, and 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane, 4,4'-dihydroxydiphenyl, bis(4-hydroxyphenyl)cycloalkane, bis(4-hydroxyphenyl)oxide, bis(4-hydroxyphenyl)sulfide, bis(4-hydroxyphenyl)sulfone, bis(4-hydroxyphenyl)sulfoxide, and bis(4-hydroxyphenyl)ketone. These dihydric phenols may be used alone or in combination of two or more. Among these, bis(hydroxyphenyl)alkane-based dihydric phenols are preferred, and bisphenol A is more preferred. When bisphenol A is used as the dihydric phenol, the resulting PC-POS copolymer (A) is one in which X is an isopropylidene group and a=b=0 in the above general formula (i).

[0064] Examples of dihydric phenols other than bisphenol A include bis(hydroxyaryl)alkanes, bis(hydroxyaryl)cycloalkanes, dihydroxyaryl ethers, dihydroxydiaryl sulfides, dihydroxydiaryl sulfoxides, dihydroxydiaryl sulfones, dihydroxydiphenyls, dihydroxydiarylfluorenes, dihydroxydiaryladamantanes, etc. These dihydric phenols may be used alone or in combination of two or more.

[0065] Examples of bis(hydroxyaryl)alkanes include bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxyphenyl)ethane, 2,2-bis(4-hydroxyphenyl)butane, 2,2-bis(4-hydroxyphenyl)octane, bis(4-hydroxyphenyl)phenylmethane, bis(4-hydroxyphenyl)diphenylmethane, 2,2-bis(4-hydroxy-3-methylphenyl)propane, bis(4-hydroxyphenyl)naphthylmethane, 1,1-bis(4-hydroxy-3-tert-butylphenyl)propane, 2,2-bis(4-hydroxy-3-bromophenyl)propane, 2,2-bis(4-hydroxy-3,5-dimethylphenyl)propane, 2,2-bis(4-hydroxy-3-chlorophenyl)propane, 2,2-bis(4-hydroxy-3,5-dichlorophenyl)propane, and 2,2-bis(4-hydroxy-3,5-dibromophenyl)propane.

[0066] Examples of bis(hydroxyaryl)cycloalkanes include 1,1-bis(4-hydroxyphenyl)cyclopentane, 1,1-bis(4-hydroxyphenyl)cyclohexane, 1,1-bis(4-hydroxyphenyl)-3,5,5-trimethylcyclohexane, 2,2-bis(4-hydroxyphenyl)norbornane, 1,1-bis(4-hydroxyphenyl)cyclododecane, etc. Examples of dihydroxyaryl ethers include 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxy-3,3'-dimethylphenyl ether, etc.

[0067] Examples of dihydroxydiaryl sulfides include 4,4'-dihydroxydiphenyl sulfide, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfide, etc. Examples of dihydroxydiaryl sulfoxides include 4,4'-dihydroxydiphenyl sulfoxide, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfoxide, etc. Examples of dihydroxydiaryl sulfones include 4,4'-dihydroxydiphenyl sulfone, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfone, etc.

[0068] Examples of dihydroxydiphenyls include 4,4'-dihydroxydiphenyl, etc. Examples of dihydroxydiarylfluorenes include 9,9-bis(4-hydroxyphenyl)fluorene, 9,9-bis(4-hydroxy-3-methylphenyl)fluorene, etc. Examples of dihydroxydiaryladamantanes include 1,3-bis(4-hydroxyphenyl)adamantane, 2,2-bis(4-hydroxyphenyl)adamantane, 1,3-bis(4-hydroxyphenyl)-5,7-dimethyladamantane, etc.

[0069] Examples of dihydric phenols other than those mentioned above include 4,4'-[1,3-phenylenebis(1-methylethylidene)]bisphenol, 10,10-bis(4-hydroxyphenyl)-9-anthrone, and 1,5-bis(4-hydroxyphenylthio)-2,3-dioxapentane.

[0070] In order to adjust the molecular weight of the resulting PC-POS copolymer (A), a terminal terminator (molecular weight regulator) can be used. Examples of the terminal terminator include monohydric phenols such as phenol, p-cresol, p-tert-butylphenol, p-tert-octylphenol, p-cumylphenol, p-nonylphenol, m-pentadecylphenol, and p-tert-amylphenol. These monohydric phenols may be used alone or in combination of two or more.

[0071] After the above-mentioned interfacial polycondensation reaction, the mixture is left to stand for an appropriate period to separate into an aqueous phase and an organic solvent phase [separation step], the organic solvent phase is washed (preferably with a basic aqueous solution, an acidic aqueous solution, and water in that order) [washing step], and the obtained organic phase is concentrated [concentration step] and dried [drying step], thereby obtaining the PC-POS copolymer (A) according to the present invention.

[0072] <Polycarbonate resin (A')> The polycarbonate resin (A') is a polycarbonate resin other than the PC-POS copolymer (A), and the main chain is composed of a repeating unit represented by the following general formula (III): The polycarbonate resin is not particularly limited, and various known polycarbonate resins can be used.

[0073] [ka] [In the formula, R 30 and R 31 each independently represents a halogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms. X' represents a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, -S-, -SO-, -SO 2 represents -, -O- or -CO-; and d and e each independently represent an integer of 0 to 4.

[0074] R 30 and R 31 Specific examples of the group represented by R 1 and R 2 The same things are listed as above, and the preferred ones are also the same. 30 and R 31 more preferably represents an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms. Specific examples of X' include the same as those of X, and the preferred examples are also the same. d and e are each independently preferably 0 to 2, more preferably 0 or 1, and even more preferably 0.

[0075] Specifically, the polycarbonate resin (A') may be one obtained by a conventional method for producing polycarbonates, such as an interfacial polymerization method in which a dihydric phenol compound and phosgene are reacted in the presence of an organic solvent inert to the reaction and an aqueous alkali solution, and then a polymerization catalyst such as a tertiary amine or a quaternary ammonium salt is added to polymerize the resulting product; or a pyridine method in which a dihydric phenol compound is dissolved in pyridine or a mixed solution of pyridine and an inert solvent, and phosgene is introduced to directly produce the product. In the above reaction, if necessary, a molecular weight regulator (terminal terminator), a branching agent, etc. are used. Examples of the dihydric phenol compound include those represented by the following general formula (III').

[0076] [ka] [In the formula, R 30 , R 31 , X', d and e are as defined above, and the preferred values ​​are also the same.]

[0077] Specific examples of the dihydric phenol compound include those described in the method for producing the PC-POS copolymer (A), and the preferred ones are the same. Among them, bis(hydroxyphenyl)alkane dihydric phenols are preferred, and bisphenol A is more preferred. The polycarbonate-based resin (A') may be used alone or in combination of two or more. The polycarbonate-based resin (A') does not have a polyorganosiloxane block as represented by formula (II) unlike the PC-POS copolymer (A), and may be, for example, a homopolycarbonate resin.

[0078] The polycarbonate resin (S) contains 55% by mass or more and 70% by mass or less of the PC-POS copolymer (A). When the amount of the PC-POS copolymer (A) in the polycarbonate resin (S) is 55% by mass or more, better impact resistance can be obtained. When the amount of the PC-POS copolymer (A) in the polycarbonate resin (S) is 70% by mass or less, the transparency of the resulting resin composition can be improved. From the viewpoint of obtaining better impact resistance and transparency, the amount is preferably 58% by mass or more, more preferably 60% by mass or more, and is preferably less than 70% by mass, more preferably 65% ​​by mass or less.

[0079] The content of the polycarbonate-based resin (A') in the polycarbonate-based resin (S) corresponds to the remainder obtained by subtracting the above-mentioned PC-POS copolymer (A) from 100% by mass of the polycarbonate-based resin (S).

[0080] The polycarbonate resin (S) contains 3.0% by mass or more and 4.0% by mass or less of the polyorganosiloxane block (A-2). When the content of the polyorganosiloxane block (A-2) in the polycarbonate resin (S) is within the above range, it is possible to achieve both better impact resistance and transparency. The content of the polyorganosiloxane block (A-2) in the polycarbonate resin (S) is preferably 3.3% by mass or more, more preferably 3.5% by mass or more, from the viewpoint of obtaining higher impact resistance, and is preferably 3.9% by mass or less, from the viewpoint of obtaining better transparency. The content is calculated by nuclear magnetic resonance (NMR) measurement.

[0081] The viscosity average molecular weight (Mv) of the polycarbonate resin (S) is 15,000 or more and 17,000 or less. If the viscosity average molecular weight of the polycarbonate resin (S) is within the above range, the strength of the molded body becomes good, or heat deterioration during injection molding or extrusion molding can be suppressed, which is preferable. The viscosity average molecular weight can be adjusted to the above range by using a molecular weight regulator (terminal terminator) or the like. The viscosity average molecular weight of the polycarbonate resin (S) is preferably 15,000 or more and 16,500 or less. If the viscosity average molecular weight is within the above range, the strength of the molded body becomes better, and heat deterioration during injection molding or extrusion molding is further suppressed. The viscosity average molecular weight of the polycarbonate resin (S) is more preferably 15,500 or more from the viewpoint of obtaining a molded body having higher strength, and more preferably less than 16,500 from the viewpoint of further suppressing heat deterioration during molding. The viscosity average molecular weight (Mv) is a value measured in the same manner as described for the PC-POS copolymer (A), that is, the intrinsic viscosity [η] of a methylene chloride solution at 20°C is measured and calculated from the following Schnell formula.

[0082]

number

[0083] [Metallic aluminum particles (B)] The polycarbonate resin composition according to the present invention contains 0.10 parts by mass or more and 0.30 parts by mass or less of metallic aluminum particles (B) based on 100 parts by mass of the polycarbonate resin (S). When the content of the metallic aluminum particles (B) is 0.10 parts by mass or more per 100 parts by mass of the polycarbonate resin (S), the luminance difference between the highlight and shade parts in the metallic appearance can be improved.When the content of the metallic aluminum particles (B) is 0.30 parts by mass or less, the decrease in impact resistance can be suppressed. Metallic aluminum particles (B) can be contained in the polycarbonate resin composition by blending the metal aluminum particles (B) or blending an aluminum paste containing the metal aluminum particles (B). The content of the metallic aluminum particles (B) in the polycarbonate resin composition according to the present invention can be measured by the ICP emission spectrometry described in the Examples.

[0084] The content of the metallic aluminum particles (B) is preferably 0.12 parts by mass or more, more preferably 0.14 parts by mass or more, even more preferably 0.18 parts by mass or more, and even more preferably 0.20 parts by mass or more, relative to 100 parts by mass of the polycarbonate-based resin (S), from the viewpoint of further improving the brightness difference between the highlight parts and the shade parts in the metallic appearance, and from the viewpoint of further suppressing the decrease in impact resistance, the content is preferably 0.28 parts by mass or less, more preferably 0.27 parts by mass or less, even more preferably 0.25 parts by mass or less, and even more preferably 0.24 parts by mass or less.

[0085] In addition, the content of the metal aluminum particles (B) is preferably 0.20 parts by mass or more, more preferably 0.25 parts by mass or more, even more preferably 0.27 parts by mass or more, even more preferably 0.30 parts by mass or more, and even more preferably 0.35 parts by mass or more, per 100 parts by mass of the polycarbonate-polyorganosiloxane copolymer (A), from the viewpoint of further improving the brightness difference between the highlight parts and the shade parts in the metallic appearance, and is preferably 0.50 parts by mass or less, more preferably 0.45 parts by mass or less, and even more preferably 0.40 parts by mass or less, from the viewpoint of further suppressing the decrease in impact resistance.

[0086] In this specification, the term "metallic aluminum particles" refers to particles made of at least one type of metallic aluminum selected from the group consisting of simple aluminum and aluminum alloys, and excludes particles made of aluminum compounds such as aluminum oxide, aluminum sulfide, aluminum hydroxide, and aluminum nitride. The content of the metallic aluminum particles (B) means the content of particles made of at least one type of metallic aluminum selected from the group consisting of simple aluminum and aluminum alloys. The polycarbonate-based resin composition according to the present invention may contain particles of an aluminum compound such as aluminum oxide, aluminum sulfide, aluminum hydroxide, or aluminum nitride to the extent that the effects of the present invention are not impaired. However, the content of the particles of the aluminum compound is preferably less than 0.30 parts by mass, more preferably less than 0.20 parts by mass, even more preferably less than 0.10 parts by mass, even more preferably less than 0.05 parts by mass, even more preferably less than 0.005 parts by mass, even more preferably less than 0.001 parts by mass, relative to 100 parts by mass of the polycarbonate-based resin composition, and it is even more preferable that the composition does not contain any particles of the aluminum compound. Metallic aluminum particles (B) and particles made of aluminum compounds such as aluminum oxide, aluminum sulfide, aluminum hydroxide, and aluminum nitride can be analyzed separately, for example, by an electron probe microanalyzer (EPMA).

[0087] [Ultraviolet absorber (C)] The polycarbonate resin composition of the present invention contains 0.10 parts by mass or more and 0.50 parts by mass or less of ultraviolet absorber (C) relative to 100 parts by mass of the polycarbonate resin (S). When the content of ultraviolet absorber (C) in the composition is 0.10 parts by mass or more, weather resistance can be improved. When the content of ultraviolet absorber (C) is 0.50 parts by mass or less, mold contamination during molding can be suppressed. The amount of ultraviolet absorber (C) is preferably 0.20 parts by mass or more and preferably 0.40 parts by mass or less relative to 100 parts by mass of the polycarbonate resin (S).

[0088] Examples of the ultraviolet absorber (C) include benzotriazole-based ultraviolet absorbers, benzoxazinone-based ultraviolet absorbers, salicylate-based ultraviolet absorbers, malonic acid ester-based ultraviolet absorbers, oxalyl alanide-based ultraviolet absorbers, triazine-based ultraviolet absorbers, benzophenone-based ultraviolet absorbers, and cyanoacrylate-based ultraviolet absorbers. These can be used alone or in combination of two or more. As the ultraviolet absorber (C), from the viewpoint of weather resistance, benzotriazole-based ultraviolet absorbers are preferred. The type and content of the ultraviolet absorber (C) in the polycarbonate resin composition according to the present invention can be measured by gas chromatography (GC or GC-MS).

[0089] Examples of the benzotriazole-based ultraviolet absorber include 2-(2'-hydroxy-5'-methylphenyl)benzotriazole, 2-(2'-hydroxy-5'-tert-butylphenyl)benzotriazole, 2-(2'-hydroxy-5'-tert-octylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-diamylphenyl)benzotriazole, Examples of the benzotriazole include 2-(2'-hydroxy-3'-dodecyl-5'-methylphenyl)benzotriazole, 2-(2'-hydroxy-3',5'-dicumylphenyl)benzotriazole, and 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol], and 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol] is preferred.

[0090] [Other additives] The polycarbonate resin composition according to the present invention may contain other components described below in addition to the polycarbonate resin (S), the metal aluminum particles (B), and the ultraviolet absorber (C) as long as they do not impair the effects of the present invention. Examples of other components include antioxidants, release agents, reinforcing materials, fillers other than the metal aluminum particles (B), elastomers for improving impact resistance, colorants other than the metal aluminum particles (B), antistatic agents, glossy particles other than the metal aluminum particles (B), and resins other than the polycarbonate resin. Some additives will be described in more detail below.

[0091] [Coloring agent] The colorant is preferably one that does not have a concealing property, and dyes and pigments can be used. Examples of dyes include methine dyes, pyrazolone dyes, perinone dyes, azo dyes, quinophthalone dyes, and anthraquinone dyes. Examples of pigments include inorganic pigments, organic pigments, mixtures of organic pigments having a complementary color relationship, mixtures of organic pigments of the three primary colors, and mixtures of organic pigments having a complementary color relationship. Examples of inorganic pigments include black pigments such as carbon black (grades MT, FT, SRF, GPF, FET, HAF, ISAF, SAF, MPC, etc.), metals such as chromium (Cr), nickel (Ni), copper (Cu), praseodymium (Pr), platinum, ruthenium, and titanium, or oxides thereof. Examples of white pigments include titanium oxide, zinc oxide, lithopone, zinc sulfide, and white lead.

[0092] Mixture of organic pigments of primary colors As the organic pigments of the three primary colors, for red (R), perylene pigments, lake pigments, azo pigments, quinacridone pigments, anthraquinone pigments, anthracene pigments, azo pigments, isoindoline pigments, isoindolinone pigments, etc. can be used alone or in a mixture of at least two or more kinds. For green (G), halogen-polysubstituted phthalocyanine pigments, halogen-polysubstituted copper phthalocyanine pigments, triphenylmethane basic dyes, azo pigments, isoindoline pigments, isoindolinone pigments, etc. can be used alone or in a mixture of at least two or more kinds. For blue (B), copper phthalocyanine pigments, indanthrone pigments, indophenol pigments, cyanine pigments, dioxazine pigments, etc. can be used alone or in a mixture of at least two or more kinds. These three primary colors can be used in a mixture.

[0093] Examples of the colors having a complementary color relationship in a mixture of organic pigments having a complementary color relationship with each other include combinations of red and cyanine, blue, green and magenta, purple, blue and yellow, etc. Specific examples of the individual colors include, in addition to the above-mentioned three primary colors, disazo pigments, isoindoline pigments, and isoindolinone pigments for yellow, and dioxandine pigments for purple, etc. These organic pigments having a complementary color relationship with each other are mixed and used.

[0094] In the polycarbonate-based resin composition according to the present invention, from the viewpoint of improving transparency and further increasing the difference in brightness between highlight and shade parts in the metallic appearance, the content of colorants other than the metallic aluminum particles (B) is preferably 0.05 parts by mass or less, more preferably 0.03 parts by mass or less, and even more preferably 0.02 parts by mass or less, per 100 parts by mass of the polycarbonate-based resin (S).

[0095] In the polycarbonate-based resin composition according to the present invention, from the viewpoint of improving transparency and further improving the difference in luminance between highlight and shade parts in metallic appearance, the content of titanium oxide is preferably 0.05 parts by mass or less, more preferably 0.03 parts by mass or less, even more preferably 0.01 parts by mass or less, and even more preferably 0.001 parts by mass or less, relative to 100 parts by mass of polycarbonate-based resin (S), and it is even more preferable that the polycarbonate-based resin composition according to the present invention does not contain titanium oxide.

[0096] [Filler] Examples of the filler include inorganic fillers, and for example, talc, mica, clay, wollastonite, bentonite, glass fiber, magnesium hydroxide, calcium hydroxide, aluminum hydroxide, hydrotalcite, magnesium oxide, calcium oxide, and calcium carbonate can be preferably used.

[0097] In the polycarbonate-based resin composition according to the present invention, from the viewpoint of further suppressing a decrease in impact resistance and elongation, the content of inorganic filler other than the metallic aluminum particles (B) is preferably 5.0 parts by mass or less, more preferably 1.0 part by mass or less, even more preferably 0.5 part by mass or less, and even more preferably 0.1 part by mass or less, relative to 100 parts by mass of the polycarbonate-based resin (S), and it is even more preferable that the polycarbonate-based resin composition according to the present invention does not contain inorganic filler other than the metallic aluminum particles (B). In this specification, the inorganic filler does not include those corresponding to the above-mentioned coloring agents and metallic aluminum particles (B).

[0098] In the polycarbonate-based resin composition according to the present invention, from the viewpoint of further suppressing a decrease in impact resistance and elongation, the content of the glass fiber is preferably 5.0 parts by mass or less, more preferably 1.0 part by mass or less, even more preferably 0.5 parts by mass or less, and even more preferably 0.1 part by mass or less, relative to 100 parts by mass of the polycarbonate-based resin (S), and it is even more preferable that the polycarbonate-based resin composition according to the present invention does not contain glass fiber.

[0099] [Antioxidants] As the antioxidant, a phenol-based antioxidant and a phosphorus-based antioxidant can be preferably used. Examples of phenol-based antioxidants include triethylene glycol-bis[3-(3-tert-butyl-5-methyl-4-hydroxyphenyl)propionate], 1,6-hexanediol-bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], pentaerythritol-tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate, 1,3,5-trimethyl-2,4,6-tris(3,5-di -tert-butyl-4-hydroxybenzyl)benzene, N,N-hexamethylenebis(3,5-di-tert-butyl-4-hydroxy-hydrocinnamide), 3,5-di-tert-butyl-4-hydroxybenzylphosphonate-diethyl ester, tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurate, 3,9-bis[1,1-dimethyl-2-[β-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy]ethyl]-2,4,8,10-tetraoxaspiro(5.5)undecane, and the like.

[0100] Examples of phosphorus-based antioxidants include triphenyl phosphite, trisnonylphenyl phosphite, tris(2,4-di-tert-butylphenyl)phosphite, tridecyl phosphite, trioctyl phosphite, trioctadecyl phosphite, didecyl monophenyl phosphite, dioctyl monophenyl phosphite, diisopropyl monophenyl phosphite, monobutyl diphenyl phosphite, monodecyl diphenyl phosphite, monooctyl diphenyl phosphite, bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite, 2,2-methylenebis(4,6-di-tert-butylphenyl)octyl phosphite, bis(nonylphenyl)pentaerythritol diphosphite, bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, distearyl pentaerythritol diphosphite, and the like. Of these, tris(2,4-di-tert-butylphenyl)phosphite is preferred. These antioxidants may be used alone or in combination of two or more. The amount of the antioxidant added is preferably 0.05 to 1.0 part by mass relative to 100 parts by mass of the polycarbonate resin (S). If the amount of the antioxidant is within the above range, higher flame retardancy can be obtained. From this viewpoint, the amount of the antioxidant added is more preferably 0.08 part by mass or more, more preferably 0.50 part by mass or less, even more preferably 0.30 part by mass or less, and even more preferably 0.15 part by mass or less.

[0101] [Glossy particles] In the polycarbonate-based resin composition according to the present invention, from the viewpoint of further improving the difference in brightness between highlight and shade areas in the metallic appearance while further suppressing the decrease in impact resistance, the content of glossy particles other than metallic aluminum particles (B) is preferably 0.005 parts by mass or less, and more preferably 0.001 parts by mass or less, per 100 parts by mass of polycarbonate-based resin (S), and it is even more preferable that the polycarbonate-based resin composition according to the present invention does not contain glossy particles other than metallic aluminum particles (B). In this specification, glossy particles other than the metallic aluminum particles (B) include mica, metal particles, metal sulfide particles, particles whose surfaces are coated with metals or metal oxides, and glass flakes whose surfaces are coated with metals or metal oxides. These may be used alone or in combination of two or more. Specific examples of metal particles include metal powders such as aluminum, gold, silver, copper, nickel, titanium, and stainless steel; specific examples of particles whose surfaces are coated with metals or metal oxides include metal oxide-coated mica-based particles such as mica titanium coated with titanium oxide and mica coated with bismuth trichloride; specific examples of metal sulfide particles include metal sulfide powders such as nickel sulfide, cobalt sulfide, and manganese sulfide; and metals used in glass flakes whose surfaces are coated with metals or metal oxides include gold, silver, platinum, palladium, nickel, copper, chromium, tin, titanium, and silicon. In this specification, the glossy particles exclude those corresponding to the above-mentioned colorants, inorganic fillers, and metallic aluminum particles (B).

[0102] [Polymethyl methacrylate resin] In the polycarbonate-based resin composition according to the present invention, from the viewpoint of further suppressing a decrease in impact resistance, the content of the polymethyl methacrylate resin is preferably 5.0 parts by mass or less, more preferably 1.0 part by mass or less, even more preferably 0.5 part by mass or less, and even more preferably 0.1 part by mass or less, relative to 100 parts by mass of the polycarbonate-based resin (S), and it is even more preferable that the polycarbonate-based resin composition according to the present invention does not contain a polymethyl methacrylate resin. In this specification, the polymethyl methacrylate resin refers to a homopolymer of methyl methacrylate or a copolymer having methyl methacrylate as the main component and copolymerized with one or more other vinyl monomers such as acrylic acid esters, other methacrylic acid esters, styrene, acrylonitrile, etc.

[0103] The polycarbonate resin composition according to the present invention can be obtained by blending and kneading the above-mentioned components in the above-mentioned ratios and various optional components used as necessary in appropriate ratios. In one embodiment of the present invention, the total content of the polycarbonate-based resin (S), the metal aluminum particles (B) and the ultraviolet absorber (C) is preferably 80 to 100 mass%, more preferably 95 to 100 mass%, even more preferably 97 to 100 mass%, even more preferably 98 to 100 mass%, and even more preferably 99 to 100 mass%, based on the total amount (100 mass%) of the polycarbonate-based resin composition.

[0104] The blending and kneading can be carried out by a method using a commonly used device. For example, the blending and kneading can be carried out by premixing with a ribbon blender, drum tumbler, etc., and then using a Henschel mixer, Banbury mixer, single screw extruder, twin screw extruder, multi-screw extruder, co-kneader, etc. The heating temperature during kneading is usually appropriately selected within the range of 240°C to 320°C. For this melt kneading, it is preferable to use an extruder, particularly a vent-type extruder.

[0105] 2. Molded body The molded article according to the present invention is made of the polycarbonate resin composition according to the present invention. The molded article according to the present invention can be produced by injection molding, injection compression molding, extrusion molding, blow molding, press molding, vacuum molding, foam molding, etc., using the melt-kneaded polycarbonate resin composition according to the present invention or pellets obtained after melt-kneading as a raw material. In particular, the polycarbonate resin composition according to the present invention can be suitably used for producing an injection-molded article by injection molding or injection compression molding, using the pellets obtained by melt-kneading.

[0106] In order to further improve the design of the molded article according to the present invention, it is possible to perform texturing, etc. For example, the above texturing can be performed by subjecting the molding surface of a mold used in injection molding to a texturing process that reproduces a texturing pattern (unevenness) by chemical etching, and then injecting a polycarbonate-based resin composition into the mold to transfer a three-dimensional texturing pattern onto the surface of the molded article. By applying an embossing process to the molded product of the present invention, light incident on the upper surface of the geometric grain is reflected in various directions by reflection and scattering at the uneven parts, so that the surface of the molded product becomes brighter overall and black lines become less visible, which is preferable. The height of the unevenness of the embossing is not particularly limited, but can be, for example, 5 μm or more and 700 μm or less. The height of the unevenness of the unevenness pattern is preferably within the above range, because it is easy to form a fine pattern with excellent visibility and rich design. More specifically, the height of the unevenness is more preferably 10 μm or more and 350 μm or less.

[0107] The molded article according to the present invention may be a two-color molded article. In that case, the polycarbonate-based resin composition according to the present invention is injected into at least one of the primary side and the secondary side. The molded article according to the present invention suppresses appearance defects such as black lines and has excellent impact resistance, and therefore can be suitably used as housings for electrical and electronic equipment parts, automobile and building material parts, etc., and can be more suitably used as automobile interior parts. EXAMPLES

[0108] The present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. The characteristic values ​​and evaluation results in each example were determined according to the following procedures.

[0109] (1) Polydimethylsiloxane chain length and content The ratio was calculated from the integral ratio of the methyl groups of polydimethylsiloxane measured by NMR. In this specification, polydimethylsiloxane may be abbreviated as PDMS. <Quantitative method for determining the chain length of polydimethylsiloxane> 1 H-NMR measurement conditions NMR device: JEOL RESONANCE ECA-500 Probe: 50TH5AT / FG2 Observation range: -5 to 15 ppm Observation center: 5 ppm Pulse repetition time: 9 seconds Pulse width: 45° NMR sample tube: 5φ Sample size: 30-40mg Solvent: deuterated chloroform Measurement temperature: 23℃ Number of times accumulated: 256 In the case of allylphenol-terminated polydimethylsiloxane A: The integral value of the methyl group of the dimethylsiloxane part observed around δ-0.02 to 0.5 B: Integral value of methylene group of allylphenol observed around δ2.50~2.75 Polydimethylsiloxane chain length = (A / 6) / (B / 4) In the case of eugenol-terminated polydimethylsiloxane A: The integral value of the methyl group of the dimethylsiloxane part observed around δ-0.02 to 0.5 B: Integral value of methylene group of eugenol observed around δ2.40~2.70 Polydimethylsiloxane chain length = (A / 6) / (B / 4)

[0110] <Method for quantifying polydimethylsiloxane content> Quantitative method for determining the amount of polydimethylsiloxane copolymerized in PTBP-terminated polycarbonate copolymerized with allylphenol-terminated polydimethylsiloxane NMR device: JEOL RESONANCE ECA-500 Probe: 50TH5AT / FG2 Observation range: -5 to 15 ppm Observation center: 5 ppm Pulse repetition time: 9 seconds Pulse width: 45° Number of times accumulated: 256 NMR sample tube: 5φ Sample size: 30-40mg Solvent: deuterated chloroform Measurement temperature: 23℃ A: Integral value of the methyl group of the BPA part observed around δ1.5-1.9 B: The integral value of the methyl group of the dimethylsiloxane part observed around δ-0.02 to 0.3 C: Integral value of the butyl group in the p-tert-butylphenyl moiety observed around δ1.2~1.4 a=A / 6 b=B / 6 c=C / 9 T=a+b+c f=a / T×100 g=b / T×100 h=c / T×100 TW=f×254+g×74.1+h×149 PDMS (wt%) = g × 74.1 / TW × 100

[0111] (2) Viscosity average molecular weight The viscosity average molecular weight (Mv) was calculated by the following formula (Schnell's formula) using the intrinsic viscosity [η] obtained by measuring the viscosity of a methylene chloride solution at 20° C. using an Ubbelohde viscometer.

[0112]

number

[0113] (3) Method for measuring the content of metallic aluminum particles (B) in a polycarbonate resin composition The content of the metallic aluminum particles (B) in the polycarbonate resin composition was measured by ICP emission spectrometry. The specific analysis method was as follows. 0.04g of the polycarbonate-based resin composition was placed in a platinum dish, and 0.2mL of sulfuric acid was added thereto. Next, the platinum dish was heated on a hot plate while gradually increasing the temperature from room temperature to 400°C, and the polycarbonate-based resin composition was carbonized. The polycarbonate-based resin composition was further incinerated in an electric furnace at 550°C for 12 hours, and then allowed to cool, and 0.5mL of hydrofluoric acid was added to the platinum dish. Next, a heating and dissolving treatment was performed on a hot plate to dissolve the residue, and then the mixture was heated to 300°C to perform a drying and solidifying treatment. After allowing to cool, 2mL of hydrochloric acid and about 2 to 5mL of ultrapure water were added, and the mixture was covered with a platinum lid and heated at 80°C for 30 to 60 minutes. Next, after cooling, the solution in the platinum dish was filled into a 10 mL volumetric flask, and the resulting solution was measured using an ICP emission spectrometer (Agilent Technologies, Agilent 5100 ICP-OES, software: ICP Expert) to quantify the amount of aluminum using a calibration curve method. The content of metallic aluminum particles (B) in the polycarbonate resin composition was calculated from the resulting amount of aluminum, and this value was recorded as the amount of metallic aluminum particles (B) in Table 1.

[0114] <Production Example: Production of Polycarbonate Oligomer> Sodium dithionite of 2000 ppm relative to bisphenol A (BPA) (to be dissolved later) was added to a 5.6% by mass aqueous solution of sodium hydroxide. BPA was dissolved in the solution so that the BPA concentration became 13.5% by mass, and an aqueous solution of sodium hydroxide for BPA was prepared. The aqueous sodium hydroxide solution of BPA was continuously passed through a tubular reactor with an inner diameter of 6 mm and a tube length of 30 m at a flow rate of 40 L / hr, methylene chloride at 15 L / hr, and phosgene at 4.0 kg / hr. The tubular reactor had a jacket, and cooling water was passed through the jacket to keep the temperature of the reaction liquid below 40°C. The reaction liquid leaving the tubular reactor was continuously introduced into a baffled tank reactor with an internal volume of 40 L and equipped with a swept-back blade, to which an aqueous sodium hydroxide solution of BPA was further added at a flow rate of 2.8 L / hr, a 25% by mass aqueous sodium hydroxide solution at 0.07 L / hr, water at 17 L / hr, and a 1% by mass aqueous triethylamine solution at 0.64 L / hr to carry out the reaction. The reaction liquid overflowing from the tank reactor was continuously withdrawn and allowed to stand to separate and remove the aqueous phase, and the methylene chloride phase was collected. The polycarbonate oligomer thus obtained had a concentration of 341 g / L and a chloroformate group concentration of 0.71 mol / L.

[0115] <Polycarbonate-polyorganosiloxane copolymer (A)> A 50 L tank-type reactor equipped with a baffle plate, a paddle-type stirring blade, and a cooling jacket was charged with 15 L of the polycarbonate oligomer solution produced in the above Production Example, 10.1 L of methylene chloride, 407 g of o-allylphenol-terminated polydimethylsiloxane (PDMS) in which the average chain length n of polydimethylsiloxane was 88, and 8.4 mL of triethylamine, and to this was added 1,065 g of an aqueous sodium hydroxide solution prepared by dissolving 85 g of sodium hydroxide in 980 mL of pure water under stirring, and the polycarbonate oligomer and the allylphenol-terminated PDMS were reacted for 20 minutes. To this polymerization liquid, a methylene chloride solution of p-tert-butylphenol (PTBP) (70.4 g of PTBP dissolved in 1.0 L of methylene chloride) and an aqueous sodium hydroxide solution of bisphenol A (1,093 g of bisphenol A dissolved in an aqueous solution of 618 g of sodium hydroxide and 2.1 g of sodium dithionite dissolved in 9.0 L of pure water) were added, and the polymerization reaction was carried out for 40 minutes. After adding 13 L of methylene chloride for dilution and stirring for 20 minutes, the mixture was separated into an organic phase containing polycarbonate-polydimethylsiloxane copolymer (PC-PDMS copolymer) and an aqueous phase containing excess bisphenol A and sodium hydroxide, and the organic phase was isolated. The methylene chloride solution of the PC-PDMS copolymer thus obtained was washed successively with a 15 volume% aqueous solution of 0.03 mol / L sodium hydroxide and 0.2 mol / L hydrochloric acid, and then repeatedly washed with pure water until the electrical conductivity of the aqueous phase after washing was 5 μS / cm or less. The methylene chloride solution of the PC-PDMS copolymer obtained by washing was concentrated and pulverized, and the obtained flakes were dried at 120°C under reduced pressure to produce PC-PDMS copolymer (A). The content of PDMS block moieties in the resulting PC-PDMS copolymer (A) was 6.0% by mass, the average number of repetitions of the PDMS block moieties was 90, and the viscosity average molecular weight Mv was 17,700, as determined by NMR.

[0116] <Polycarbonate resin (A')> Aromatic homopolycarbonate resin (A') [Idemitsu Kosan Co., Ltd., Toughlon FN1500 (product name), viscosity average molecular weight = 14,200] Aromatic homopolycarbonate resin (A'') [Idemitsu Kosan Co., Ltd., Toughlon FN1700 (product name), viscosity average molecular weight = 17,700] <Aluminum paste (B') containing metallic aluminum particles (B)> M-45 (Raw material code used within Sanyo Kako Co., Ltd., aluminum paste containing metallic aluminum particles consisting of a single aluminum component) <Ultraviolet absorber (C)> "LA-31RG (product name)" [2,2'-methylenebis[6-(2H-benzotriazol-2-yl)-4-(1,1,3,3-tetramethylbutyl)phenol], manufactured by ADEKA Corporation]

[0117] <Other ingredients> Antioxidant: "IRGAFOS 168 (trade name)" [tris(2,4-di-tert-butylphenyl)phosphite, manufactured by BASF Japan Ltd.]

[0118] Examples 1 to 2, Comparative Examples 1 to 3 The PC-PDMS copolymer (A), aromatic homopolycarbonate resin (A'), aromatic homopolycarbonate resin (A''), aluminum paste (B'), ultraviolet absorber (C), and antioxidant were mixed in the mixing ratio shown in Table 1. The aluminum paste (B') was mixed so that the metallic aluminum particles (B) reached the ratio shown in Table 1. Next, the mixture was melt-kneaded at a cylinder temperature of 260°C using a vented single-screw extruder with a screw diameter of 40 mm ("VS-40" manufactured by Tanabe Plastics Machinery Co., Ltd.), and pellets of the polycarbonate resin composition were obtained by strand cutting. Here, the units of the blending ratios in Table 1 are mass % for the PC-PDMS copolymer (A), aromatic homopolycarbonate resin (A'), and aromatic homopolycarbonate resin (A'') when the polycarbonate-based resin (S) is 100 mass %, and the units of the blending ratios are mass parts for the metal aluminum particles (B), ultraviolet absorber (C), and antioxidant when the polycarbonate-based resin (S) is 100 parts by mass.

[0119] [Table 1]

[0120] [Evaluation test] The pellets obtained above were dried at 100°C for 5 hours, and then injection molded using an injection molding machine at a cylinder temperature of 280°C and a mold temperature of 80°C to obtain the desired test pieces required for the following evaluations. The test pieces were used to evaluate the luminous reflectance Y highlight / shade and Charpy impact strength. The results are also shown in Table 1.

[0121] <Luminous reflectance Y highlight / shade> For the molded test pieces with a thickness of 3 mm, a three-dimensional spectrophotometer "DDC3000" (manufactured by Nippon Denshoku Industries Co., Ltd.) was used to measure the visual reflectance Y value at a light source incident angle of -45 degrees and a reflection angle of -40 to 70 degrees in accordance with JIS Z8701:1999. The difference between the Y value at a reflection angle of 30 degrees and the reflection angle of -30 degrees was taken as the Y highlight / shade. The Y value was measured after calibrating the value of the standard white plate to 100%. A Y highlight / shade of 25 or more was judged as "A", a Y highlight / shade of 20 or more but less than 25 was judged as "B", and a Y highlight / shade of less than 20 was judged as "C".

[0122] <Charpy impact strength> The pellets obtained were injection molded under the above-mentioned conditions to obtain Charpy test pieces (4 mm thick). The test pieces were then given a notch (r=0.25 mm±0.05 mm) by post-processing, and the Charpy impact strength at 23°C was measured using a Charpy impact tester (Toyo Seiki Seisakusho Co., Ltd., Charpy Impact Tester, Model 611) in accordance with ISO 179-1:2010. If the Charpy impact strength was 20 kJ / m 2 Above this, "A", 15kJ / m 2 More than 20kJ / m 2 "B" for less than 10 kJ / m 2 More than 15kJ / m 2 "C" for less than 10kJ / m 2 Cases where the score was less than this were rated as "D".

[0123] From Table 1, it can be seen that the polycarbonate-based resin molded bodies made of the polycarbonate-based resin compositions of the Examples have an improved balance between impact resistance and the difference in brightness between highlight and shade areas in the metallic appearance, compared to the molded bodies of the Comparative Examples. In this embodiment, a good balance between impact resistance and the difference in brightness between the highlight and shade areas in the metallic appearance means that the luminous reflectance Y (highlight / shade) and the Charpy impact strength are both rated "B" or higher.

Claims

1. A polycarbonate-based resin (S) comprising a polycarbonate block (A-1) having a repeating unit represented by the following general formula (I) and a polyorganosiloxane block (A-2) having a repeating unit represented by the following general formula (II) and having an average repeat number of 85 to 95; and a polycarbonate resin (A') having a repeating unit represented by the following general formula (III): the polycarbonate-based resin (S) contains 0.10 parts by mass or more and 0.30 parts by mass or less of metallic aluminum particles (B) and 0.10 parts by mass or more and 0.50 parts by mass or less of an ultraviolet absorber (C) relative to 100 parts by mass of the polycarbonate-based resin (S), and the content of glossy particles other than the metallic aluminum particles (B) is 0.005 parts by mass or less relative to 100 parts by mass of the polycarbonate-based resin (S); The polycarbonate-polyorganosiloxane copolymer (A) contains the polyorganosiloxane block (A-2) in an amount of 5.0% by mass or more and 7.0% by mass or less and has a viscosity average molecular weight of 16,000 or more and 18,000 or less, The polycarbonate-based resin (S) contains 55% by mass or more and 70% by mass or less of the polycarbonate-polyorganosiloxane copolymer (A), contains 3.0% by mass or more and 4.0% by mass or less of the polyorganosiloxane block (A-2), and has a viscosity average molecular weight of 15,000 or more and 17,000 or less. A polycarbonate-based resin composition. 【Chemistry 1】 [In the formula, R １ and R ２ each independently represents a halogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms. X represents a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, a fluorenediyl group, an arylalkylene group having 7 to 15 carbon atoms, an arylalkylidene group having 7 to 15 carbon atoms, -S-, -SO-, -SO ２ represents -, -O- or -CO-. ３ and R ４ each independently represents a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, or an aryl group having 6 to 12 carbon atoms. a and b each independently represent an integer of 0 to 4. 【Chemistry 2】 [In the formula, R ３０ and R ３１ each independently represents a halogen atom, an alkyl group having 1 to 6 carbon atoms, or an alkoxy group having 1 to 6 carbon atoms. X' represents a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, a cycloalkylidene group having 5 to 15 carbon atoms, -S-, -SO-, -SO ２ It represents --, --O-- or --CO--. d and e each independently represent an integer of 0 to 4.

2. 2. The polycarbonate-based resin composition according to claim 1, wherein the content of the metal aluminum particles (B) is 0.20 parts by mass or more and 0.50 parts by mass or less per 100 parts by mass of the polycarbonate-polyorganosiloxane copolymer (A).

3. A molded article comprising the polycarbonate resin composition according to claim 1 or 2.

4. The molded article according to claim 3 , which is an automobile interior part.

Images