Polycarbonate resin composition and molded article comprising the same

Abstract

To provide a polycarbonate resin composition that has high surface hardness and excels in wear resistance, heat resistance, transparency, low water absorption, and flowability; and a molded article comprising the same.SOLUTION: A polycarbonate resin composition comprises 0.01 to 10 pts.wt. of a fatty acid ester (B) relative to 100 pts.wt. of a polycarbonate resin (A) that contains 70 mol% or more of a structural unit (a) represented by formula (1) and a structural unit (b) represented by formula (2) based on all structural units.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a polycarbonate resin composition having high surface hardness and excellent abrasion resistance, heat resistance, transparency, low water absorbency and flowability, and to a molded article made of the same. [Background technology]

[0002] Polycarbonate resin has excellent transparency, impact resistance, heat resistance, and dimensional stability, and is therefore used as an engineering plastic in a wide range of fields, such as the housings of electrical and electronic devices, interior and exterior parts of automobiles, building materials, furniture, musical instruments, miscellaneous goods, etc. Furthermore, compared to inorganic glass, it has a lower specific gravity, allowing for weight reduction, and is highly manufacturable, so it is used for windows in automobiles, etc.

[0003] Furthermore, sheets and films using polycarbonate resins are widely used as various display devices and protective parts for automobile interiors by subjecting them to additional secondary processing such as coating, lamination, and surface modification.

[0004] However, polycarbonate resin that has not been subjected to a coating treatment has a pencil hardness of only about 2B when measured in accordance with JIS K5600-5-4, General test methods for paints - Part 5: Mechanical properties of coatings - Section 4: Scratch hardness (pencil method), and as an uncoated material, it has the problem that its surface is easily scratched.

[0005] Therefore, it is known to use a copolymer polycarbonate resin with high surface hardness (for example, Patent Document 1). Also, a method of producing a polycarbonate or copolycarbonate having 2,2-bis(4-hydroxy-3-methylphenyl)propane as a structural unit has been described (for example, Patent Documents 2 to 6). Although the polycarbonate resin has improved surface hardness, it has a problem in that it has inferior heat resistance compared to polycarbonate resin.

[0006] Furthermore, Patent Document 7 describes that a polycarbonate resin having 2-phenyl-3,3-bis(p-hydroxyphenyl)phthalimidine as a structural unit has excellent abrasion resistance as a binder resin for an electrophotographic photoreceptor. However, when a structural unit having a rigid structure is introduced to increase scratch resistance, there is a problem that the glass transition temperature increases and the fluidity decreases.

[0007] As a method for improving the fluidity of polycarbonate resin, a method of adding a fatty acid ester to the polycarbonate resin can be mentioned (for example, Patent Documents 8 to 11). According to Patent Document 12, adding a fatty acid ester to a polycarbonate resin having high surface hardness improves not only the fluidity but also the abrasion resistance. However, the glass transition temperature of the polycarbonate resin composition is significantly decreased by adding a fatty acid ester. Therefore, it may not be possible to use the polycarbonate resin as a material for automobile interior parts. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 5173803 [Patent Document 2] Japanese Patent Application Publication No. 64-069625 [Patent Document 3] Japanese Patent Application Publication No. 08-183852 [Patent Document 4] Japanese Patent Application Publication No. 08-034846 [Patent Document 5] JP 2002-117580 A [Patent Document 6] Patent No. 3768903 [Patent Document 7] Patent No. 3297469 [Patent Document 8] JP 2009-292962 A [Patent Document 9] JP 2011-80059 A [Patent Document 10] Special Publication No. 2012-516792 [Patent Document 11] Special Publication No. 2019-516837 [Patent Document 12] JP 2020-175550 A Summary of the Invention [Problem to be solved by the invention]

[0009] As described above, there is a demand for polycarbonate resin compositions having high surface hardness and excellent abrasion resistance, heat resistance, transparency, low water absorbency and flowability, and for molded articles made of the same.

[0010] Therefore, an object of the present invention is to provide a polycarbonate resin composition having high surface hardness and excellent abrasion resistance, heat resistance, transparency, low water absorbency and flowability, and a molded article made of the same. [Means for solving the problem]

[0011] As a result of intensive research conducted by the present inventors to achieve the above object, it was found that a polycarbonate resin composition comprising a polycarbonate resin having a specific structural unit and a fatty acid ester, and a molded article comprising the same, can solve the above problems, and the present invention was completed. That is, according to the present invention, the following items 1 to 15 are provided.

[0012] 1. A structural unit (a) represented by the following formula (1), and [ka] (In formula (1), R1, R2, and R3 each independently represent a hydrogen atom, a halogen atom, or an alkyl group having 1 to 3 carbon atoms; R4 represents an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an aryl-substituted alkyl group having 7 to 13 carbon atoms; and n and m each independently represent an integer of 1 to 4.) A structural unit (b) represented by the following formula (2): [ka] (In formula (2), R5 and R6 each independently represent a hydrogen atom, a halogen atom, or an alkyl group having 1 to 3 carbon atoms, o and p each independently represent an integer of 1 to 4, and X is a single bond or at least one group selected from the group consisting of the following formula (3): [ka] (In formula (3), R7, R8, R9, R 10 , R 11 , R 12 , R 13 and R 14 each independently represents at least one group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an aryl group having 6 to 14 carbon atoms, and an aralkyl group having 7 to 20 carbon atoms; R 15 and R 16 each independently represents at least one group selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group having 1 to 18 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a cycloalkyl group having 6 to 20 carbon atoms, a cycloalkoxy group having 6 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an aryl group having 6 to 14 carbon atoms, an aryloxy group having 6 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an aralkyloxy group having 7 to 20 carbon atoms, a nitro group, an aldehyde group, a cyano group, and a carboxyl group, and when there are a plurality of groups, they may be the same or different, a is an integer from 1 to 10, and b is an integer from 4 to 7. A polycarbonate resin composition comprising 100 parts by weight of a polycarbonate resin (A) containing 70 mol % or more of the above based on all structural units, and 0.01 to 10 parts by weight of a fatty acid ester (B).

[0013] 2. The polycarbonate resin composition according to item 1 above, wherein the content of the structural unit (a) is 10 mol % or more based on all structural units. 3. The polycarbonate resin composition according to item 1 or 2 above, wherein the structural unit (a) is a structural unit derived from 2-phenyl-3,3-bis(4-hydroxyphenyl)phthalimidine or 2-phenyl-3,3-bis(4-hydroxy-3-methylphenyl)phthalimidine. 4. The polycarbonate resin composition according to any one of items 1 to 3 above, wherein the fatty acid ester (B) has 80 or less carbon atoms. 5. The polycarbonate resin composition according to any one of items 1 to 4 above, wherein the fatty acid ester (B) is a fatty acid ester derived from a monocarboxylic acid having 30 or less carbon atoms. 6. The polycarbonate resin composition according to any one of items 1 to 5 above, wherein the fatty acid ester (B) is a fatty acid ester derived from an alcohol having 30 or less carbon atoms. 7. The polycarbonate resin composition according to any one of items 1 to 6 above, which has a pencil hardness of H or more as measured in accordance with JIS K5600. 8. The polycarbonate resin composition according to any one of items 1 to 7 above, which has a glass transition temperature of 140 to 300°C. 9. The melt volume rate (300°C, 1.2kgf (11.8N)) measured in accordance with ISO1133 is 3 to 50cm 3 9. The polycarbonate resin composition according to any one of items 1 to 8 above, wherein the viscosity is 100 / 10 min. 10. The polycarbonate resin composition according to any one of items 1 to 9 above, which has a haze value of 1.50% or less as measured on a molded plate having a thickness of 10.2 mm. 11. The polycarbonate resin composition according to any one of items 1 to 10 above, which has a saturated water absorption of 1.0% or less as measured in accordance with JIS K7209:2000. 12. The polycarbonate resin composition according to any one of items 1 to 11 above, wherein the gloss change rate measured by the following method is 75% or less. Measurement method: Using a rubbing tester IMC-1507 manufactured by Imoto Manufacturing Co., Ltd., the test was carried out under the conditions of using polishing paper 261X manufactured by 3M Japan Ltd. as the abrasive paper, a load of 9N, a reciprocating speed of 30 reciprocations / min, and a number of reciprocations of 5 times. After that, a handy gloss meter manufactured by Nippon Denshoku Industries Co., Ltd. was used to evaluate the change in reflectance at 20°. 13. A molded article obtained by injection molding the polycarbonate resin composition according to any one of items 1 to 12 above. 14. A sheet or film obtained by extrusion molding the polycarbonate resin composition according to any one of items 1 to 12 above. 15. An automobile interior part using the molded product described in the preceding paragraph 13 or the sheet or film described in the preceding paragraph 14. Effect of the Invention

[0014] The polycarbonate resin composition of the present invention and the molded article made of the same are excellent in surface hardness, abrasion resistance, heat resistance, transparency, low water absorption and flowability, and therefore are particularly suitable for use as automobile interior parts, and therefore the industrial effects thereof are exceptional. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] The present invention will be described in detail below.

[0016] <Polycarbonate resin composition> The polycarbonate resin composition of the present invention comprises a structural unit (a) represented by the following formula (1), and

[0017] [ka]

[0018] (In formula (1), R1, R2, and R3 each independently represent a hydrogen atom, a halogen atom, or an alkyl group having 1 to 3 carbon atoms; R4 represents an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an aryl-substituted alkyl group having 7 to 13 carbon atoms; and n and m each independently represent an integer of 1 to 4.) A structural unit (b) represented by the following formula (2):

[0019] [ka]

[0020] (In formula (2), R5 and R6 each independently represent a hydrogen atom, a halogen atom, or an alkyl group having 1 to 3 carbon atoms, o and p each independently represent an integer of 1 to 4, and X is a single bond or at least one group selected from the group consisting of the following formula (3):

[0021] [ka]

[0022] (In formula (3), R7, R8, R9, R 10 , R 11 , R 12 , R 13 and R 14 each independently represents at least one group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an aryl group having 6 to 14 carbon atoms, and an aralkyl group having 7 to 20 carbon atoms; R 15 and R 16 each independently represents at least one group selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group having 1 to 18 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a cycloalkyl group having 6 to 20 carbon atoms, a cycloalkoxy group having 6 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an aryl group having 6 to 14 carbon atoms, an aryloxy group having 6 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an aralkyloxy group having 7 to 20 carbon atoms, a nitro group, an aldehyde group, a cyano group, and a carboxyl group, and when there are a plurality of groups, they may be the same or different, a is an integer from 1 to 10, and b is an integer from 4 to 7. The polycarbonate resin composition contains 100 parts by weight of a polycarbonate resin (A) containing 70 mol % or more of the above based on all structural units, and 0.01 to 10 parts by weight of a fatty acid ester (B).

[0023] <Polycarbonate resin (A)> Of all the structural units in the polycarbonate resin (A), the structural units (a) and (b) account for 70 mol % or more, preferably 80 mol % or more, and more preferably 90 mol % or more.

[0024] In the polycarbonate resin (A), the content of the structural unit (a) represented by the formula (1) is preferably 10 mol % or more, more preferably 10 to 75 mol %, even more preferably 15 to 60 mol % or more, and particularly preferably 20 to 50 mol % or more, based on 100 mol % of all structural units excluding the terminals. If it is less than the lower limit, the pencil hardness and glass transition temperature may be low, and if it exceeds the upper limit, the glass transition temperature may be high and the flowability may be reduced.

[0025] The ratio of the structural unit (a) may be achieved by a polycarbonate copolymer or by mixing polycarbonate resins having different composition ratios (polycarbonate blend).

[0026] In the structural unit (a), R1, R2 and R3 are each independently a hydrogen atom, a halogen atom or an alkyl group having 1 to 3 carbon atoms, preferably a hydrogen atom or an alkyl group having 1 to 3 carbon atoms, and more preferably a hydrogen atom or a methyl group. R4 is an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an aryl-substituted alkyl group having 7 to 13 carbon atoms, preferably an alkyl group having 1 to 12 carbon atoms or an aryl group having 6 to 12 carbon atoms, more preferably an aryl group having 6 to 12 carbon atoms, and most preferably a phenyl group.

[0027] Examples of dihydric phenols from which the structural unit (a) is derived include 2-phenyl-3,3-bis(4-hydroxyphenyl)phthalimidine, 2-phenyl-3,3-bis(4-hydroxy-3-methylphenyl)phthalimidine, 2-phenyl-3,3-bis(4-hydroxy-3,5-dimethylphenyl)phthalimidine, 2-phenyl-3,3-bis(4-hydroxy-3-isopropylphenyl)phthalimidine, etc. Preferred are 2-phenyl-3,3-bis(4-hydroxyphenyl)phthalimidine and 2-phenyl-3,3-bis(4-hydroxy-3-methylphenyl)phthalimidine, and the most preferred dihydric phenol is 2-phenyl-3,3-bis(4-hydroxyphenyl)phthalimidine.

[0028] In the structural unit (b) represented by the formula (2), R5 and R6 each independently represent a hydrogen atom, a halogen atom, or an alkyl group having 1 to 3 carbon atoms, preferably a hydrogen atom, a methyl group, an ethyl group, or an n-propyl group, and more preferably a hydrogen atom or a methyl group. In addition, the bonding positions of R5 and R6 in the formula (2) are preferably the 5-position relative to X.

[0029] In the formula (3), R7, R8, R9, R 10 , R 11 , R 12 , R 13 and R 14 each independently represents at least one group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an aryl group having 6 to 14 carbon atoms, and an aralkyl group having 7 to 20 carbon atoms, preferably a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, and particularly preferably a hydrogen atom or a methyl group.

[0030] In addition, in the formula (3), R 15 and R 16each independently represents at least one group selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group having 1 to 18 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a cycloalkyl group having 6 to 20 carbon atoms, a cycloalkoxy group having 6 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an aryl group having 6 to 14 carbon atoms, an aryloxy group having 6 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an aralkyloxy group having 7 to 20 carbon atoms, a nitro group, an aldehyde group, a cyano group, and a carboxyl group, and is preferably a hydrogen atom or an alkyl group having 1 to 18 carbon atoms, and particularly preferably a hydrogen atom or a methyl group.

[0031] In the formula (3), a is an integer of 1 to 10, preferably an integer of 1 to 4, and more preferably an integer of 1. b is an integer of 4 to 7, and preferably an integer of 5. In the above formula (3), an isopropylidene group, a cyclohexylidene group, a methyl-substituted cyclohexylidene group, and a fluorene group are preferred, with an isopropylidene group being particularly preferred.

[0032] Examples of dihydric phenols from which the structural unit (b) represented by the formula (2) is derived include 4,4'-bis(2,6-dimethyl)diphenol, 2,2-bis(4-hydroxy-3-methylphenyl)propane (hereinafter sometimes referred to as bisphenol C), 2,2-bis(2,3-dimethyl-4-hydroxyphenyl)propane, 1,1-bis(3-methyl-4-hydroxyphenyl)decane, 1,1-bis(2,3-dimethyl-4-hydroxyphenyl)decane, α,α'-bis(4-hydroxy-3-methylphenyl)-o-diisopropylbenzene, α,α'-bis(4-hydroxy-3-methylphenyl)-m-diisopropylbenzene, α,α'-bis(4-hydroxy-3-methylphenyl)-p-diisopropylbenzene, and 1,1-bis(4-hydroxy-3-methylphenyl)-3,3,5 -trimethylcyclohexane (hereinafter sometimes referred to as bisphenol OCTMC), 1,1-bis(4-hydroxy-3-methylphenyl)cyclohexane (hereinafter sometimes referred to as bisphenol OCZ), 9,9-bis(4-hydroxy-3-methylphenyl)fluorene, 4,4'-dihydroxy-3,3'-dimethylbenzophenone, 4,4'-dihydroxy-3,3'-dimethyldiphenyl ether, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfone, 2,4'-dihydroxy-3,3'-dimethyldiphenyl sulfone, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfoxide, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfide, 4-hydroxy-3-methylphenyl-4-hydroxy-3-methylbenzoate, and the like.

[0033] Among the above dihydric phenols, bisphenol C, bisphenol OCTMC, bisphenol OCZ, and 9,9-bis(4-hydroxy-3-methylphenyl)fluorene are preferred, and bisphenol C is most preferred.

[0034] In the polycarbonate resin of the present invention, the ratio of the structural unit (b) to 100 mol % of all structural units excluding the terminals is preferably 25 to 90 mol %, more preferably 40 to 85 mol %, and most preferably 50 to 80 mol %. When the ratio of the structural unit (b) is within the above range, it is preferable because it provides an excellent balance of surface hardness, abrasion resistance, heat resistance, transparency, low water absorbency, and flowability.

[0035] The polycarbonate resin of the present invention may further contain other copolymerization units in an amount of 30 mol % or less, preferably 20 mol % or less, more preferably 10 mol % or less, and even more preferably 5 mol % or less of all structural units, as long as the effects of the present invention are not impaired.

[0036] Other dihydroxy compounds which may lead to copolymerization units include hydroquinone, resorcinol, orcinol, 2,2-bis(4-hydroxyphenyl)norbornene, 1,3-bis(4-hydroxyphenyl)adamantane; 2,2-bis(4-hydroxyphenyl)adamantane; 1,3-bis(4-hydroxyphenyl)-5,7-dimethyladamantane, 10,10-bis(4-hydroxyphenyl)-9-anthrone, 1,5-bis(4-hydroxyphenylthio)-2,3-dioxapentaenebisphenoxyethanolfluorene, and the like.

[0037] Other diol compounds that can be used to derive copolymerization units include isosorbide:1,4:3,6-dianhydro-D-sorbitol, tricyclodecane dimethanol (TCDDM), 4,8-bis(hydroxymethyl)tricyclodecane, tetramethylcyclobutanediol (TMCBD), 2,2,4,4-tetramethylcyclobutane-1,3-diol, mixed isomers, cis / trans-1,4-cyclohexanedimethanol (CHDM), cis / trans-1,4-bis(hydroxymethyl)cyclohexane, and cyclohex-1,4-yl ether. Examples of such cyclohexanedimethanol include trans-1,4-cyclohexanedimethanol (tCHDM), trans-1,4-bis(hydroxymethyl)cyclohexane, cis-1,4-cyclohexanedimethanol (cCHDM), cis-1,4-bis(hydroxymethyl)cyclohexane, cis-1,2-cyclohexanedimethanol, 1,1'-bi(cyclohexyl)-4,4'-diol, spiroglycol, dicyclohexyl-4,4'-diol, 4,4'-dihydroxybicyclohexyl, and poly(ethylene glycol).

[0038] <Fatty acid ester (B)> From the viewpoints of fluidity and abrasion resistance, the fatty acid ester (B) used in the polycarbonate resin composition of the present invention is preferably a fatty acid ester having 80 or less carbon atoms, more preferably a fatty acid ester having 50 or less carbon atoms, still more preferably a fatty acid ester having 10 to 50 carbon atoms, particularly preferably a fatty acid ester having 20 to 45 carbon atoms, and most preferably a fatty acid ester having 25 to 45 carbon atoms.

[0039] On the other hand, from the viewpoint of compatibility with polycarbonate resins, the monocarboxylic acid from which the fatty acid ester is derived is preferably a monocarboxylic acid having 30 or less carbon atoms, and more preferably a monocarboxylic acid having 10 to 25 carbon atoms. From the same viewpoint, the alcohol from which the fatty acid ester is derived is preferably an alcohol having 30 or less carbon atoms, more preferably an alcohol having 2 to 25 carbon atoms, and particularly preferably an alcohol having 10 to 25 carbon atoms. The alcohol is preferably a monohydric alcohol, a dihydric alcohol, or a tetrahydric alcohol, more preferably a monohydric alcohol or a dihydric alcohol, and particularly preferably a monohydric alcohol.

[0040] Specific examples of fatty acid esters include cetyl myristate (e.g., Sperm Acetate, manufactured by NOF Corp.), stearyl stearate (e.g., Unistar M-9676, manufactured by NOF Corp.), behenyl behenate (e.g., Unistar M-2222SL, manufactured by NOF Corp.), ethyl stearate (e.g., Unistar E-275, manufactured by NOF Corp.), lignoceryl behenate, behenyl lignocerate, pentaerythritol distearate (e.g., Unistar H-476D, manufactured by NOF Corp.), and pentaerythritol tetrastearate (e.g., Unistar H-476, manufactured by NOF Corp.).

[0041] The amount of the fatty acid ester to be added is in the range of 0.01 to 10 parts by weight, preferably 0.1 to 5 parts by weight, more preferably 0.3 to 3 parts by weight, and further preferably 0.5 to 2 parts by weight, per 100 parts by weight of the polycarbonate resin (A).

[0042] <Production method of polycarbonate resin> The raw material monomer of the polycarbonate resin (A) used in the polycarbonate resin composition of the present invention is a dihydric phenol represented by the following formula (4) and

[0043] [ka]

[0044] (In formula (4), R1, R2, and R3 each independently represent a hydrogen atom, a halogen atom, or an alkyl group having 1 to 3 carbon atoms; R4 represents an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an aryl-substituted alkyl group having 7 to 13 carbon atoms; and n and m each independently represent an integer of 1 to 4.) A dihydric phenol represented by the following formula (5):

[0045] [ka]

[0046] (In formula (5), R5 and R6 each independently represent a hydrogen atom, a halogen atom, or an alkyl group having 1 to 3 carbon atoms, o and p each independently represent an integer of 1 to 4, and X is a single bond or at least one group selected from the group consisting of the following formula (3):

[0047] [ka]

[0048] (In formula (3), R7, R8, R9, R 10 , R 11 , R 12 , R 13 and R 14 each independently represents at least one group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an aryl group having 6 to 14 carbon atoms, and an aralkyl group having 7 to 20 carbon atoms; R 15 and R 16each independently represents at least one group selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group having 1 to 18 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a cycloalkyl group having 6 to 20 carbon atoms, a cycloalkoxy group having 6 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an aryl group having 6 to 14 carbon atoms, an aryloxy group having 6 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an aralkyloxy group having 7 to 20 carbon atoms, a nitro group, an aldehyde group, a cyano group, and a carboxyl group, and when there are a plurality of groups, they may be the same or different, a is an integer from 1 to 10, and b is an integer from 4 to 7. Includes.

[0049] The dihydric phenol represented by the above formula (4) includes the dihydric phenol that derives the above-mentioned structural unit (a). The dihydric phenol represented by the above formula (5) includes the dihydric phenol that derives the above-mentioned structural unit (b).

[0050] The polycarbonate resin (A) used in the polycarbonate resin composition of the present invention may be further copolymerized with other dihydroxy compounds or diol compounds to the extent that the properties of the polycarbonate resin composition are not impaired. Examples of other dihydroxy compounds include the dihydroxy compounds and diol compounds that derive the above-mentioned other copolymerization units.

[0051] The polycarbonate resin (A) used in the polycarbonate resin composition of the present invention is obtained by reacting the dihydric phenol compound with a carbonate precursor. The reaction method may include an interfacial polycondensation method, a melt transesterification method, a solid-phase transesterification method of a carbonate prepolymer, and a ring-opening polymerization method of a cyclic carbonate compound. In the case of interfacial polycondensation, a terminal terminator of a monohydric phenol is usually used.

[0052] The polycarbonate resin (A) used in the polycarbonate resin composition includes polyester carbonate copolymerized with aromatic or aliphatic (including alicyclic) difunctional carboxylic acids. The aliphatic difunctional carboxylic acids are preferably α,ω-dicarboxylic acids. Examples of the aliphatic difunctional carboxylic acids include linear saturated aliphatic dicarboxylic acids such as sebacic acid (decanedioic acid), dodecanedioic acid, tetradecanedioic acid, octadecanedioic acid, and icosane diacid, and alicyclic dicarboxylic acids such as cyclohexane dicarboxylic acid. These carboxylic acids may be copolymerized to the extent that the purpose is not hindered. In addition, the polycarbonate copolymer may also be copolymerized with a structural unit containing a polyorganosiloxane unit as necessary.

[0053] The polycarbonate resin (A) used in the polycarbonate resin composition can also be made into a branched polycarbonate by copolymerizing a structural unit containing a trifunctional or higher polyfunctional aromatic compound, if necessary.

[0054] Suitable examples of trifunctional or higher polyfunctional aromatic compounds used in branched polycarbonates include 4,6-dimethyl-2,4,6-tris(4-hydroxyphenyl)heptene-2, 2,4,6-trimethyl-2,4,6-tris(4-hydroxyphenyl)heptane, 1,3,5-tris(4-hydroxyphenyl)benzene, 1,1,1-tris(4-hydroxyphenyl)ethane, 1,1,1-tris(3,5-dimethyl-4-hydroxyphenyl)ethane, 2,6-bis(2-hydroxy-5-methylbenzyl)-4-methylphenol, and trisphenols such as 4-{4-[1,1-bis(4-hydroxyphenyl)ethyl]benzene}-α,α-dimethylbenzylphenol. Among these, 1,1,1-tris(4-hydroxyphenyl)ethane is preferred. The content of the structural units derived from such polyfunctional aromatic compounds is preferably 0.03 to 1.5 mol %, more preferably 0.1 to 1.2 mol %, and particularly preferably 0.2 to 1.0 mol %, of a total of 100 mol % including the structural units derived from other dihydric phenol components.

[0055] The branched structural unit may be derived not only from a polyfunctional aromatic compound, but also from a side reaction occurring during a polymerization reaction by a melt transesterification method without using a polyfunctional aromatic compound. 1 It can be calculated by H-NMR measurement.

[0056] In a reaction using, for example, phosgene as a carbonate precursor, the reaction is usually carried out in the presence of an acid binder and a solvent. As the acid binder, for example, an alkali metal hydroxide such as sodium hydroxide or potassium hydroxide, or an amine compound such as pyridine, is used. As the solvent, for example, a halogenated hydrocarbon such as methylene chloride or chlorobenzene is used. In addition, a catalyst such as a tertiary amine or a quaternary ammonium salt can be used to promote the reaction. In this case, the reaction temperature is usually 0 to 40°C, and the reaction time is several minutes to 5 hours.

[0057] The transesterification reaction using, for example, a carbonic acid diester as a carbonate precursor is carried out by a method in which a predetermined ratio of aromatic dihydroxy components is heated and stirred with a carbonic acid diester under an inert gas atmosphere, and the alcohol or phenols produced are distilled off. The reaction temperature varies depending on the boiling point of the alcohol or phenols produced, but is usually in the range of 120 to 300°C. The reaction is completed by reducing the pressure from the beginning of the reaction and distilling off the alcohol or phenols produced. In order to promote the reaction, a catalyst usually used in transesterification reactions can also be used. Examples of the carbonic acid diester used in the transesterification reaction include diphenyl carbonate, dinaphthyl carbonate, bis(diphenyl)carbonate, dimethyl carbonate, diethyl carbonate, and dibutyl carbonate. Among these, diphenyl carbonate is particularly preferred.

[0058] Monofunctional phenols that are commonly used as end terminators can be used. In particular, in the case of a reaction using phosgene as a carbonate precursor, monofunctional phenols are generally used as end terminators to adjust molecular weight, and the obtained polycarbonate copolymer has excellent thermal stability compared to those that are not, since the ends are blocked by groups based on monofunctional phenols. Specific examples of the monofunctional phenols include phenol, 3-methylphenol, 4-methylphenol, 3-propylphenol, 4-propylphenol, 1-phenylphenol, 2-phenylphenol, p-tert-butylphenol, p-cumylphenol, isooctylphenol, 4-octylphenol, 4-nonylphenol, 4-dodecylphenol, 4-pentadecylphenol, and 3-pentadecylphenol.

[0059] <Method for producing polycarbonate resin composition> The polycarbonate resin composition of the present invention is preferably prepared by blending the polycarbonate resin and the fatty acid ester in a molten state. As a method for blending in a molten state, an extruder is generally used, and the mixture is kneaded at a molten resin temperature of 200 to 400°C and pelletized. This provides a polycarbonate resin composition in which the polycarbonate resin and the fatty acid ester are uniformly blended. The configuration of the extruder, the configuration of the screw, etc. are not particularly limited.

[0060] (Other Ingredients) The polycarbonate resin composition of the present invention may contain, as additives other than the fatty acid ester (B), heat stabilizers, ultraviolet absorbers, bluing agents, antistatic agents, flame retardants, heat shielding agents, fluorescent dyes (including fluorescent brighteners), pigments, light diffusing agents, reinforcing fillers, other resins, elastomers, etc.

[0061] Examples of the heat stabilizer include phosphorus-based heat stabilizers, sulfur-based heat stabilizers, and hindered phenol-based heat stabilizers. Examples of the phosphorus-based heat stabilizer include phosphorous acid, phosphoric acid, phosphonous acid, phosphonic acid, and esters thereof. Specific examples of the heat stabilizer include bis(2,4-dicumylphenyl)pentaerythritol diphosphite, tris(2,4-di-tert-butylphenyl)phosphite, tris(2,6-di-tert-butylphenyl)phosphite, 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate stearyl, [1,1-biphenyl]-4,4-diylbis[bis(2,4-di-tert-butylphenoxy)phosphine], 3,9-bis(2,6-di-tert-butylphenyl)propionate, ... butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane is preferred, and tris(2,4-di-tert-butylphenyl)phosphite, 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate stearyl, and 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane are more preferred.

[0062] The amount of the heat stabilizer to be added is preferably in the range of 0.001 to 0.5 parts by weight, more preferably in the range of 0.005 to 0.4 parts by weight, and further preferably in the range of 0.01 to 0.3 parts by weight, relative to 100 parts by weight of the polycarbonate resin.

[0063] (viscosity average molecular weight) The viscosity average molecular weight of the polycarbonate resin composition in the present invention is preferably 6,000 to 30,000, more preferably 8,000 to 28,000, and further preferably 10,000 to 25,000. A molecular weight within the above range is preferred in terms of excellent mechanical properties, productivity, and processability.

[0064] The viscosity average molecular weight of the polycarbonate resin composition in the present invention is calculated by first calculating the specific viscosity (η SP ) was measured at 20°C using an Ostwald viscometer from a solution of 0.7 g of resin in 100 ml of methylene chloride. Specific viscosity (η SP )=(t-t0) / t0 [t0 is the number of seconds that methylene chloride falls, and t is the number of seconds that the sample solution falls] The specific viscosity (η SP ) and the viscosity average molecular weight Mv was calculated using the following formula: η SP / c=[η]+0.45×[η] 2 c (where [η] is the intrinsic viscosity) [η]=1.23×10 -4 Mv 0.83 c=0.7

[0065] (Glass transition temperature: Tg) The glass transition temperature (Tg) of the polycarbonate resin composition in the present invention is preferably in the range of 140 to 300°C, more preferably 140 to 250°C, and further preferably 140 to 200°C. Within the above range, the composition is preferable in terms of excellent heat resistance and flowability. The glass transition temperature (Tg) is measured using a 2910-type DSC manufactured by TA Instruments Japan Co., Ltd. at a heating rate of 20°C / min.

[0066] (Melt Volume Rate: MVR) The melt volume rate (300° C., 1.2 kgf (11.8 N)) of the polycarbonate resin composition in the present invention is not particularly limited, but is preferably 3 to 50 cm 3 / 10min, more preferably 5 to 40cm 3 / 10 min, and more preferably 7 to 30 cm 3 / 10min. Resins with a melt volume rate below the lower limit above may have poor fluidity during injection molding. On the other hand, if the melt volume rate exceeds the upper limit above, good mechanical properties may not be obtained. The melt volume rate is also called "MVR" and is measured in accordance with ISO1133.

[0067] (Pencil hardness) The pencil hardness of the polycarbonate resin composition of the present invention is preferably H or more, more preferably 2H or more, and even more preferably 3H or more. The pencil hardness is a hardness at which no scratch marks remain when the polycarbonate resin composition of the present invention is rubbed with a pencil having a specific pencil hardness, and it is preferable to use the pencil hardness used in the surface hardness test of a coating film that can be measured according to JIS K-5600 as an index. The pencil hardness becomes softer in the order of 9H, 8H, 7H, 6H, 5H, 4H, 3H, 2H, H, F, HB, B, 2B, 3B, 4B, 5B, and 6B, with the hardest being 9H and the softest being 6B.

[0068] (Abrasion resistance (gloss change rate)) The abrasion resistance (glossiness change rate) of the polycarbonate resin composition in the present invention is preferably 75% or less, more preferably 70% or less, even more preferably 65% ​​or less, and particularly preferably 60% or less. Within the above range, the glossiness change rate is small and the abrasion resistance is excellent. The abrasion resistance (glossiness change rate) was tested using a rubbing tester IMC-1507 manufactured by Imoto Manufacturing Co., Ltd., under the conditions of polishing paper 261X manufactured by 3M Japan Ltd., a load of 9N, a reciprocating speed of 30 reciprocations / min, and a reciprocating number of 5 times. After the test, the change in reflectance at 20° was evaluated using a handy gloss meter manufactured by Nippon Denshoku Kogyo Co., Ltd.

[0069] (Transparency (Haze value)) The transparency (haze value) of the polycarbonate resin composition of the present invention is not particularly limited, but is preferably 1.50% or less, more preferably 1.00% or less, and further preferably 0.90% or less. If the transparency (haze value) is within the above range, the compatibility of the resin and the fatty acid ester is high, and therefore the transparency is high and is preferable.

[0070] (saturated water absorption rate) The saturated water absorption of the polycarbonate resin composition of the present invention is measured in accordance with JIS K7209:2000 and is preferably 1.0% or less, more preferably 0.8% or less, even more preferably 0.7% or less, and particularly preferably 0.6% or less. The lower limit of the saturated water absorption is not particularly limited, but 0.1% or more is sufficient. If the saturated water absorption is within the above range, the dimensional change due to water absorption is small, and the moldability such as excellent dimensional stability is good.

[0071] (Molding method and molded product) As a method for molding the polycarbonate resin composition in the present invention, a general molding method for polycarbonate resin compositions can be used, such as injection molding, extrusion molding, compression molding, solution cast molding, etc. In particular, a method for molding a molded product by injection molding or a method for molding a sheet or film by extrusion molding is preferably used.

[0072] The polycarbonate resin composition of the present invention and molded articles made thereof have excellent surface hardness, abrasion resistance, heat resistance, transparency, low water absorbency and flowability, and are therefore particularly suitable for automobile interior parts such as lamp lenses for interior lighting, display meter covers, meter dial plates, various switch covers, display covers, heat control panels, instrument panels, center clusters, center panels, room lamp lenses, various display devices such as head-up displays, protective parts, and light-transmitting parts. EXAMPLES

[0073] The present invention will be described in more detail below with reference to examples, but the present invention is not limited thereto. The evaluation was performed according to the following methods. (1) Composition ratio 40 mg of the sample was dissolved in 0.6 mL of deuterated chloroform, and the polymer composition ratio (molar ratio) was calculated from the integral ratio of each structural unit by proton NMR using a JNM-AL400 manufactured by JEOL Ltd.

[0074] (2) Viscosity average molecular weight The specific viscosity (η SP) was measured at 20°C using an Ostwald viscometer from a solution of 0.7 g of sample dissolved in 100 ml of methylene chloride. Specific viscosity (η SP )=(t-t0) / t0 [t0 is the number of seconds that methylene chloride falls, and t is the number of seconds that the sample solution falls] The specific viscosity (η SP ) and the viscosity average molecular weight Mv was calculated using the following formula: η SP / c=[η]+0.45×[η] 2 c (where [η] is the intrinsic viscosity) [η]=1.23×10 -4 Mv 0.83 c=0.7

[0075] (3) Glass transition temperature (Tg) Using 8 mg of sample, measurements were performed using a thermal analysis system DSC-2910 manufactured by TA Instruments Co., Ltd. under conditions of nitrogen atmosphere (nitrogen flow rate: 40 ml / min) and heating rate: 20°C / min in accordance with JIS K7121.

[0076] (4) Mel Volume Rate (MVR) The melt volume rate was measured under conditions of 300°C and 1.2 kgf (11.8 N) in accordance with ISO1133.

[0077] (5) Pencil hardness Measurements were performed using a resin plate according to JIS K5600 under conditions of load: 750 g, measurement speed: 50 mm / min, measurement distance: 7 mm, and pencil: Mitsubishi Pencil's Hi-uni, and the surface condition was visually evaluated.

[0078] (6) Abrasion resistance (gloss change rate) The test was carried out using a resin plate and a rubbing tester IMC-1507 manufactured by Imoto Manufacturing Co., Ltd., under the following conditions: polishing paper 261X manufactured by 3M Japan Ltd., load 9N, reciprocation speed 30 reciprocations / min, and number of reciprocations 5 times. After the test, the change in reflectance at 20° was evaluated using a handy gloss meter manufactured by Nippon Denshoku Industries Co., Ltd.

[0079] (7) Transparency (haze value) The transparency (haze value) of the resin plate at a 2 mm thickness was evaluated using a color and turbidity simultaneous measurement meter COH400 manufactured by Nippon Denshoku Industries Co., Ltd.

[0080] (8) Saturated water absorption rate In accordance with JIS K7209:2000, a test piece was prepared by cutting a 2.2 cm x 2.5 cm square from a 2 mm thick portion of a resin plate, and after drying at 50°C for 24 hours, it was immersed in water at 25°C and then weighed. The water absorption rate was calculated using the following formula. Water absorption rate (%) = {(resin weight after water absorption - resin weight before water absorption) / resin weight before water absorption} x 100 The water absorption rate was measured over time, and the water absorption rate at which the equilibrium value was reached was determined as the saturated water absorption rate.

[0081] [Example 1] <Production of polycarbonate resin> In a reactor equipped with a thermometer, a stirrer, and a reflux condenser, 17508 parts by weight of ion-exchanged water and 10475 parts by weight of 25% aqueous sodium hydroxide solution were placed under a nitrogen atmosphere, and 2573 parts by weight of 2-phenyl-3,3-bis(p-hydroxyphenyl)phthalimidine (manufactured by Shanxi Liuqing ▲ Anger Industry ▼, hereinafter referred to as PPPBP) as a dihydric phenol, 3113 parts by weight of 2,2-bis(4-hydroxy-3-methylphenyl)propane (manufactured by Honshu Chemical, hereinafter referred to as BPC) and 11.37 parts by weight of hydrosulfite (manufactured by Fuji Film Wako Pure Chemical) were dissolved, and then 20670 parts by weight of methylene chloride was added, and 2500 parts by weight of phosgene was blown in for 70 minutes at 18 to 20 ° C. under stirring. Then, 1496 parts by weight of 25% aqueous sodium hydroxide solution and 89.79 parts by weight of p-tert-butylphenol (manufactured by DIC, hereinafter referred to as PTBP) were added and stirred. During the reaction, 4.723 parts by weight of triethylamine (manufactured by Fujifilm Wako Pure Chemical Industries, Ltd.) was added, and the reaction was terminated after stirring at 25-30°C for 1.5 hours. After the reaction was completed, the organic phase was separated, diluted with methylene chloride, and repeatedly washed with ion-exchanged water. When the washing liquid became neutral, it was washed with acidic hydrochloric acid water. After that, it was repeatedly washed with ion-exchanged water, and when the conductivity of the aqueous phase became almost the same as that of the ion-exchanged water, it was dropped into warm water kept at 50-80°C, and the solvent was evaporated and removed to obtain a flaky solid. The obtained solid was filtered and dried at 120°C for 24 hours to obtain a white flaky polycarbonate resin. <Production of polycarbonate resin composition> To 100 parts by weight of the obtained polycarbonate resin, 2.0 parts by weight of Sperm Acetate (manufactured by NOF Corp., cetyl myristate) was added as a fatty acid ester, 0.05 parts by weight of Irganox1076 (manufactured by BASF, hindered phenol-based antioxidant) and 0.05 parts by weight of Irgafos168 (manufactured by BASF, phosphorus-based stabilizer) were added as heat stabilizers. Then, the mixture was melt-kneaded at a cylinder and die temperature of 290°C using a vented twin-screw extruder (KZW15-25MG manufactured by Technobel Co., Ltd.) to obtain a polycarbonate resin composition. The obtained polycarbonate resin composition was dried at 120°C for 12 hours or more, and then a resin plate for evaluation was molded using an injection molding machine. The evaluation results are shown in Table 1.

[0082] [Example 2] <Production of polycarbonate resin> It was produced in the same manner as in Example 1. <Production of polycarbonate resin composition> The production was carried out in the same manner as in Example 1, except that 2.0 parts by weight of M-B96R (manufactured by NOF Corporation, fatty acid monoester) was used as the fatty acid ester. The evaluation results are shown in Table 1.

[0083] [Example 3] <Production of polycarbonate resin> It was produced in the same manner as in Example 1. <Production of polycarbonate resin composition> The product was produced in the same manner as in Example 1, except that 2.0 parts by weight of M-9676 (stearyl stearate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 1.

[0084] [Example 4] <Production of polycarbonate resin> It was produced in the same manner as in Example 1. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 1, except that 2.0 parts by weight of M-2222SL (behenyl behenate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 1.

[0085] [Example 5] <Production of polycarbonate resin> It was produced in the same manner as in Example 1. <Production of polycarbonate resin composition> The product was produced in the same manner as in Example 1, except that 2.0 parts by weight of E-275 (glycol distearate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 1.

[0086] [Example 6] <Production of polycarbonate resin> It was produced in the same manner as in Example 1. <Production of polycarbonate resin composition> The product was produced in the same manner as in Example 1, except that 2.0 parts by weight of H-476D (pentaerythritol distearate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 1.

[0087] [Example 7] <Production of polycarbonate resin> It was produced in the same manner as in Example 1. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 1, except that 2.0 parts by weight of H-476 (pentaerythritol tetrastearate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 1.

[0088] [Example 8] <Production of polycarbonate resin> It was produced in the same manner as in Example 1. <Production of polycarbonate resin composition> The preparation was carried out in the same manner as in Example 1, except that 0.5 parts by weight of M-9676 (stearyl stearate, manufactured by NOF Corp.) was used as the fatty acid ester. The evaluation results are shown in Table 1.

[0089] [Example 9] <Production of polycarbonate resin> It was produced in the same manner as in Example 1. <Production of polycarbonate resin composition> The product was produced in the same manner as in Example 1, except that 1.0 part by weight of M-9676 (stearyl stearate, manufactured by NOF Corp.) was used as the fatty acid ester. The evaluation results are shown in Table 1.

[0090] [Example 10] <Production of polycarbonate resin> In a reactor equipped with a thermometer, a stirrer, and a reflux condenser, 17508 parts by weight of ion-exchanged water and 8145 parts by weight of 25% sodium hydroxide solution were placed under a nitrogen atmosphere, and 2000 parts by weight of PPPBP, 2420 parts by weight of BPC, and 8.842 parts by weight of hydrosulfite were dissolved as dihydric phenols. Then, 16072 parts by weight of methylene chloride was added, and 1800 parts by weight of phosgene was blown in over 80 minutes at 18-20°C while stirring. Then, 1163 parts by weight of 25% sodium hydroxide solution and 121.95 parts by weight of 4-dodecylphenol (Sigma-Aldrich, hereinafter referred to as 4DDP) were added and stirred. During the reaction, 3.67 parts by weight of triethylamine was added, and the reaction was terminated after stirring for 1.5 hours at 25-30°C. After the reaction was completed, the organic phase was separated, diluted with methylene chloride, and repeatedly washed with ion-exchanged water. When the washing liquid became neutral, it was washed with acidic hydrochloric acid water. After that, it was repeatedly washed with ion-exchanged water, and when the conductivity of the aqueous phase became almost the same as that of the ion-exchanged water, it was dropped into warm water kept at 50 to 80°C, and the solvent was evaporated and removed to obtain a flaky solid. The obtained solid was filtered and dried at 120°C for 24 hours to obtain a white flaky polycarbonate resin. <Production of polycarbonate resin composition> To 100 parts by weight of the obtained polycarbonate resin, 2.0 parts by weight of Sperm Acetate (manufactured by NOF Corp., cetyl myristate) was added as a fatty acid ester, 0.05 parts by weight of Irganox1076 (manufactured by BASF, hindered phenol-based antioxidant) and 0.05 parts by weight of Irgafos168 (manufactured by BASF, phosphorus-based stabilizer) were added as heat stabilizers. Then, the mixture was melt-kneaded at a cylinder and die temperature of 290°C using a vented twin-screw extruder (KZW15-25MG manufactured by Technobel Co., Ltd.) to obtain a polycarbonate resin composition. The obtained polycarbonate resin composition was dried at 120°C for 12 hours or more, and then a resin plate for evaluation was molded using an injection molding machine. The evaluation results are shown in Table 2.

[0091] [Example 11] <Production of polycarbonate resin> It was produced in the same manner as in Example 10. <Production of polycarbonate resin composition> The production was carried out in the same manner as in Example 10, except that 2.0 parts by weight of M-B96R (manufactured by NOF Corporation, fatty acid monoester) was used as the fatty acid ester. The evaluation results are shown in Table 2.

[0092] [Example 12] <Production of polycarbonate resin> It was produced in the same manner as in Example 10. <Production of polycarbonate resin composition> The product was produced in the same manner as in Example 10, except that 2.0 parts by weight of M-9676 (stearyl stearate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 2.

[0093] [Example 13] <Production of polycarbonate resin> It was produced in the same manner as in Example 10. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 10, except that 2.0 parts by weight of M-2222SL (behenyl behenate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 2.

[0094] [Example 14] <Production of polycarbonate resin> It was produced in the same manner as in Example 10. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 10, except that 2.0 parts by weight of E-275 (manufactured by NOF Corporation, glycol distearate) was used as the fatty acid ester. The evaluation results are shown in Table 2.

[0095] [Example 15] <Production of polycarbonate resin> It was produced in the same manner as in Example 10. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 10, except that 2.0 parts by weight of H-476D (pentaerythritol distearate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 2.

[0096] [Example 16] <Production of polycarbonate resin> It was produced in the same manner as in Example 10. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 10, except that 2.0 parts by weight of H-476 (pentaerythritol tetrastearate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 2.

[0097] [Example 17] <Production of polycarbonate resin> It was produced in the same manner as in Example 10. <Production of polycarbonate resin composition> The product was produced in the same manner as in Example 10, except that 0.5 parts by weight of M-9676 (stearyl stearate, manufactured by NOF Corp.) was used as the fatty acid ester. The evaluation results are shown in Table 2.

[0098] [Example 18] <Production of polycarbonate resin> It was produced in the same manner as in Example 10. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 10, except that 1.0 part by weight of M-9676 (stearyl stearate, manufactured by NOF Corp.) was used as the fatty acid ester. The evaluation results are shown in Table 2.

[0099] [Example 19] <Production of polycarbonate resin> In a reactor equipped with a thermometer, a stirrer, and a reflux condenser, 17508 parts by weight of ion-exchanged water and 8145 parts by weight of 25% aqueous sodium hydroxide solution were placed under a nitrogen atmosphere, and 2000 parts by weight of PPPBP, 2420 parts by weight of BPC, and 8.842 parts by weight of hydrosulfite were dissolved as dihydric phenols. Then, 16072 parts by weight of methylene chloride was added, and 1800 parts by weight of phosgene was blown in for 80 minutes at 18 to 20°C while stirring. Then, 1163 parts by weight of 25% aqueous sodium hydroxide solution and 141.96 parts by weight of 3-pentadecylphenol (manufactured by Tokyo Chemical Industry Co., Ltd., hereinafter referred to as 3PDP) were added and stirred. During the reaction, 3.67 parts by weight of triethylamine were added, and the reaction was terminated when stirring was continued for 1.5 hours at 25 to 30°C. After the reaction was completed, the organic phase was separated, diluted with methylene chloride, and repeatedly washed with ion-exchanged water. When the washing liquid became neutral, it was washed with hydrochloric acid acid water. After that, it was repeatedly washed with ion-exchanged water, and when the conductivity of the aqueous phase became almost the same as that of the ion-exchanged water, it was dropped into warm water kept at 50 to 80°C to evaporate and remove the solvent, and a flaky solid was obtained. The obtained solid was filtered and dried at 120°C for 24 hours, and a white flaky polycarbonate resin was obtained. <Production of polycarbonate resin composition> To 100 parts by weight of the obtained polycarbonate resin, 2.0 parts by weight of Sperm Acetate (manufactured by NOF Corp., cetyl myristate) was added as a fatty acid ester, 0.05 parts by weight of Irganox1076 (manufactured by BASF, hindered phenol-based antioxidant) and 0.05 parts by weight of Irgafos168 (manufactured by BASF, phosphorus-based stabilizer) were added as heat stabilizers. Then, the mixture was melt-kneaded at a cylinder and die temperature of 290°C using a vented twin-screw extruder (KZW15-25MG manufactured by Technobel Co., Ltd.) to obtain a polycarbonate resin composition. The obtained polycarbonate resin composition was dried at 120°C for 12 hours or more, and then a resin plate for evaluation was molded using an injection molding machine. The evaluation results are shown in Table 3.

[0100] [Example 20] <Production of polycarbonate resin> Produced in the same manner as in Example 19. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 19, except that 2.0 parts by weight of M-B96R (manufactured by NOF Corporation, fatty acid monoester) was used as the fatty acid ester. The evaluation results are shown in Table 3.

[0101] [Example 21] <Production of polycarbonate resin> Produced in the same manner as in Example 19. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 19, except that 2.0 parts by weight of M-9676 (stearyl stearate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 3.

[0102] [Example 22] <Production of polycarbonate resin> Produced in the same manner as in Example 19. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 19, except that 2.0 parts by weight of M-2222SL (behenyl behenate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 3.

[0103] [Example 23] <Production of polycarbonate resin> Produced in the same manner as in Example 19. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 19, except that 2.0 parts by weight of E-275 (manufactured by NOF Corporation, glycol distearate) was used as the fatty acid ester. The evaluation results are shown in Table 3.

[0104] [Example 24] <Production of polycarbonate resin> Produced in the same manner as in Example 19. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 19, except that 2.0 parts by weight of H-476D (pentaerythritol distearate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 3.

[0105] [Example 25] <Production of polycarbonate resin> Produced in the same manner as in Example 19. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 19, except that 2.0 parts by weight of H-476 (pentaerythritol tetrastearate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 3.

[0106] [Example 26] <Production of polycarbonate resin> Produced in the same manner as in Example 19. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 19, except that 0.5 parts by weight of M-9676 (stearyl stearate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 3.

[0107] [Example 27] <Production of polycarbonate resin> Produced in the same manner as in Example 19. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 19, except that 1.0 part by weight of M-9676 (stearyl stearate, manufactured by NOF Corp.) was used as the fatty acid ester. The evaluation results are shown in Table 3.

[0108] [Example 28] <Production of polycarbonate resin> In a reactor equipped with a thermometer, a stirrer, and a reflux condenser, 13091 parts by weight of ion-exchanged water and 7832 parts by weight of 25% aqueous sodium hydroxide solution were placed under a nitrogen atmosphere, and 1374 parts by weight of PPPBP, 2685 parts by weight of BPC, and 8.119 parts by weight of hydrosulfite were dissolved as dihydric phenols. Then, 15455 parts by weight of methylene chloride was added, and 1800 parts by weight of phosgene was blown in at 18-20°C under stirring for 80 minutes. Then, 1119 parts by weight of 25% aqueous sodium hydroxide solution and 67.13 parts by weight of PTBP were added and stirred. During the reaction, 3.531 parts by weight of triethylamine were added, and the reaction was terminated when stirring was continued for 1.5 hours at 25-30°C. After the reaction was completed, the organic phase was separated, diluted with methylene chloride, and repeatedly washed with ion-exchanged water. When the washing liquid became neutral, it was washed with hydrochloric acid acid water. After that, it was repeatedly washed with ion-exchanged water, and when the conductivity of the aqueous phase became almost the same as that of the ion-exchanged water, it was dropped into warm water kept at 50 to 80°C to evaporate and remove the solvent, and a flaky solid was obtained. The obtained solid was filtered and dried at 120°C for 24 hours, and a white flaky polycarbonate resin was obtained. <Production of polycarbonate resin composition> To 100 parts by weight of the obtained polycarbonate resin, 2.0 parts by weight of M-9676 (made by NOF Corp., stearyl stearate) as a fatty acid ester, 0.05 parts by weight of Irganox1076 (made by BASF, hindered phenol-based antioxidant) as a heat stabilizer, and 0.05 parts by weight of Irgafos168 (made by BASF, phosphorus-based stabilizer) were added. Then, the mixture was melt-kneaded at a cylinder and die temperature of 290 ° C. using a vented twin-screw extruder (KZW15-25MG made by Technobel Co., Ltd.) to obtain a polycarbonate resin composition. The obtained polycarbonate resin composition was dried at 120 ° C. for 12 hours or more, and then a resin plate for evaluation was molded using an injection molding machine. The evaluation results are shown in Table 4.

[0109] [Example 29] <Production of polycarbonate resin> Produced in the same manner as in Example 28. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 28, except that 0.5 parts by weight of M-9676 (stearyl stearate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 4.

[0110] [Example 30] <Production of polycarbonate resin> Produced in the same manner as in Example 28. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 28, except that 1.0 part by weight of M-9676 (stearyl stearate, manufactured by NOF Corp.) was used as the fatty acid ester. The evaluation results are shown in Table 4.

[0111] [Example 31] <Production of polycarbonate resin> It was produced in the same manner as in Example 28, except that 117.3 parts by weight of 4DDP was used instead of 67.13 parts by weight of PTBP. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 28. The evaluation results are shown in Table 4.

[0112] [Example 32] <Production of polycarbonate resin> Produced in the same manner as in Example 31. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 31, except that 0.5 parts by weight of M-9676 (stearyl stearate, manufactured by NOF Corp.) was used as the fatty acid ester. The evaluation results are shown in Table 4.

[0113] [Example 33] <Production of polycarbonate resin> Produced in the same manner as in Example 31. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 31, except that 1.0 part by weight of M-9676 (stearyl stearate, manufactured by NOF Corp.) was used as the fatty acid ester. The evaluation results are shown in Table 4.

[0114] [Example 34] <Production of polycarbonate resin> This was produced in the same manner as in Example 28, except that 136.5 parts by weight of 3PDP was used instead of 67.13 parts by weight of PTBP. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 28. The evaluation results are shown in Table 4.

[0115] [Example 35] <Production of polycarbonate resin> Produced in the same manner as in Example 34. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 34, except that 0.5 parts by weight of M-9676 (stearyl stearate, manufactured by NOF Corp.) was used as the fatty acid ester. The evaluation results are shown in Table 4.

[0116] [Example 36] <Production of polycarbonate resin> Produced in the same manner as in Example 34. <Production of polycarbonate resin composition> It was produced in the same manner as in Example 34, except that 1.0 part by weight of M-9676 (stearyl stearate, manufactured by NOF Corp.) was used as the fatty acid ester. The evaluation results are shown in Table 4.

[0117] [Reference example 1] <Production of polycarbonate resin> It was produced in the same manner as in Example 1. <Production of polycarbonate resin composition> To 100 parts by weight of the obtained polycarbonate resin, 0.05 parts by weight of Irganox1076 (BASF, hindered phenol-based antioxidant) and 0.05 parts by weight of Irgafos168 (BASF, phosphorus-based stabilizer) were added as heat stabilizers. Then, the mixture was melt-kneaded at a cylinder and die temperature of 290°C using a vented twin-screw extruder (KZW15-25MG, Technobel Co., Ltd.) to obtain a polycarbonate resin composition. The obtained polycarbonate resin composition was dried at 120°C for 12 hours or more, and then a resin plate for evaluation was molded using an injection molding machine. The evaluation results are shown in Table 1.

[0118] [Reference example 2] <Production of polycarbonate resin> It was produced in the same manner as in Example 10. <Production of polycarbonate resin composition> To 100 parts by weight of the obtained polycarbonate resin, 0.05 parts by weight of Irganox1076 (BASF, hindered phenol-based antioxidant) and 0.05 parts by weight of Irgafos168 (BASF, phosphorus-based stabilizer) were added as heat stabilizers. Then, the mixture was melt-kneaded at a cylinder and die temperature of 290°C using a vented twin-screw extruder (KZW15-25MG, Technobel Co., Ltd.) to obtain a polycarbonate resin composition. The obtained polycarbonate resin composition was dried at 120°C for 12 hours or more, and then a resin plate for evaluation was molded using an injection molding machine. The evaluation results are shown in Table 2.

[0119] [Reference example 3] <Production of polycarbonate resin> Produced in the same manner as in Example 19. <Production of polycarbonate resin composition> To 100 parts by weight of the obtained polycarbonate resin, 0.05 parts by weight of Irganox1076 (manufactured by BASF, hindered phenol-based antioxidant) and 0.05 parts by weight of Irgafos168 (manufactured by BASF, phosphorus-based stabilizer) were added as heat stabilizers. Then, the mixture was melt-kneaded at a cylinder and die temperature of 290°C using a vented twin-screw extruder (KZW15-25MG manufactured by Technobel Co., Ltd.) to obtain a polycarbonate resin composition. The obtained polycarbonate resin composition was dried at 120°C for 12 hours or more, and then a resin plate for evaluation was molded using an injection molding machine. The evaluation results are shown in Table 3.

[0120] [Reference example 4] <Production of polycarbonate resin> Produced in the same manner as in Example 28. <Production of polycarbonate resin composition> To 100 parts by weight of the obtained polycarbonate resin, 0.05 parts by weight of Irganox1076 (BASF, hindered phenol-based antioxidant) and 0.05 parts by weight of Irgafos168 (BASF, phosphorus-based stabilizer) were added as heat stabilizers. Then, the mixture was melt-kneaded at a cylinder and die temperature of 290°C using a vented twin-screw extruder (KZW15-25MG, Technobel Co., Ltd.) to obtain a polycarbonate resin composition. The obtained polycarbonate resin composition was dried at 120°C for 12 hours or more, and then a resin plate for evaluation was molded using an injection molding machine. The evaluation results are shown in Table 4.

[0121] [Reference example 5] <Production of polycarbonate resin> Produced in the same manner as in Example 31. <Production of polycarbonate resin composition> To 100 parts by weight of the obtained polycarbonate resin, 0.05 parts by weight of Irganox1076 (BASF, hindered phenol-based antioxidant) and 0.05 parts by weight of Irgafos168 (BASF, phosphorus-based stabilizer) were added as heat stabilizers. Then, the mixture was melt-kneaded at a cylinder and die temperature of 290°C using a vented twin-screw extruder (KZW15-25MG, Technobel Co., Ltd.) to obtain a polycarbonate resin composition. The obtained polycarbonate resin composition was dried at 120°C for 12 hours or more, and then a resin plate for evaluation was molded using an injection molding machine. The evaluation results are shown in Table 4.

[0122] [Reference example 6] <Production of polycarbonate resin> Produced in the same manner as in Example 34. <Production of polycarbonate resin composition> To 100 parts by weight of the obtained polycarbonate resin, 0.05 parts by weight of Irganox1076 (BASF, hindered phenol-based antioxidant) and 0.05 parts by weight of Irgafos168 (BASF, phosphorus-based stabilizer) were added as heat stabilizers. Then, the mixture was melt-kneaded at a cylinder and die temperature of 290°C using a vented twin-screw extruder (KZW15-25MG, Technobel Co., Ltd.) to obtain a polycarbonate resin composition. The obtained polycarbonate resin composition was dried at 120°C for 12 hours or more, and then a resin plate for evaluation was molded using an injection molding machine. The evaluation results are shown in Table 4.

[0123] [Comparative Example 1] <Production of polycarbonate resin> In a reactor equipped with a thermometer, a stirrer, and a reflux condenser, 13295 parts by weight of ion-exchanged water and 6818 parts by weight of 25% sodium hydroxide aqueous solution were placed under a nitrogen atmosphere, and 2753 parts by weight of 2,2-bis(4-hydroxyphenyl)propane (manufactured by Nippon Steel Chemical & Material, hereinafter referred to as BPA) as a dihydric phenol, 545 parts by weight of BPC, and 9.895 parts by weight of hydrosulfite were dissolved. Then, 12074 parts by weight of methylene chloride was added, and 1800 parts by weight of phosgene was blown in at 18 to 20°C under stirring for 80 minutes. Then, 1136 parts by weight of 25% sodium hydroxide aqueous solution and 68.18 parts by weight of PTBP were added and stirred. During the reaction, 3.587 parts by weight of triethylamine was added, and the reaction was terminated after stirring for 1.5 hours at 25 to 30°C. After the reaction was completed, the organic phase was separated, diluted with methylene chloride, and repeatedly washed with ion-exchanged water. When the washing liquid became neutral, it was washed with acidic hydrochloric acid water. After that, it was repeatedly washed with ion-exchanged water, and when the conductivity of the aqueous phase became almost the same as that of the ion-exchanged water, it was dropped into warm water kept at 50 to 80°C, and the solvent was evaporated and removed to obtain a flaky solid. The obtained solid was filtered and dried at 120°C for 24 hours to obtain a white flaky polycarbonate resin. <Production of polycarbonate resin composition> To 100 parts by weight of the obtained polycarbonate resin, 2.0 parts by weight of M-9676 (made by NOF Corp., stearyl stearate) as a fatty acid ester, 0.1 parts by weight of Irganox1076 (made by BASF, hindered phenol-based antioxidant) and 0.03 parts by weight of Irgafos168 (made by BASF, phosphorus-based stabilizer) as a heat stabilizer were added. Then, the mixture was melt-kneaded at a cylinder and die temperature of 290 ° C. using a vented twin-screw extruder (KZW15-25MG made by Technobel Co., Ltd.) to obtain a polycarbonate resin composition. The obtained polycarbonate resin composition was dried at 120 ° C. for 12 hours or more, and then a resin plate for evaluation was molded using an injection molding machine. The evaluation results are shown in Table 5.

[0124] [Comparative Example 2] <Production of polycarbonate resin> It was produced in the same manner as in Comparative Example 1. <Production of polycarbonate resin composition> It was produced in the same manner as in Comparative Example 1, except that 2.0 parts by weight of M-2222SL (behenyl behenate, manufactured by NOF Corporation) was used as the fatty acid ester. The evaluation results are shown in Table 5.

[0125] [Comparative Example 3] <Production of polycarbonate resin> In a reactor equipped with a thermometer, a stirrer, and a reflux condenser, 13295 parts by weight of ion-exchanged water and 6818 parts by weight of 25% sodium hydroxide solution were placed under a nitrogen atmosphere, and 2105 parts by weight of BPA, 1273 parts by weight of BPC, and 10.13 parts by weight of hydrosulfite were dissolved as dihydric phenols. Then, 12074 parts by weight of methylene chloride was added, and 1800 parts by weight of phosgene was blown in at 18 to 20°C under stirring for 80 minutes. Then, 1136 parts by weight of 25% sodium hydroxide solution and 68.18 parts by weight of PTBP were added and stirred. During the reaction, 3.587 parts by weight of triethylamine were added, and the reaction was terminated when stirring was continued for 1.5 hours at 25 to 30°C. After the reaction was completed, the organic phase was separated, diluted with methylene chloride, and repeatedly washed with ion-exchanged water. When the washing liquid became neutral, it was washed with hydrochloric acid acid water. After that, it was repeatedly washed with ion-exchanged water, and when the conductivity of the aqueous phase became almost the same as that of the ion-exchanged water, it was dropped into warm water kept at 50 to 80°C to evaporate and remove the solvent, and a flaky solid was obtained. The obtained solid was filtered and dried at 120°C for 24 hours, and a white flaky polycarbonate resin was obtained. <Production of polycarbonate resin composition> To 100 parts by weight of the obtained polycarbonate resin, 2.0 parts by weight of M-2222SL (NOF Corp., behenyl behenate) was added as a fatty acid ester, 0.1 parts by weight of Irganox1076 (BASF, hindered phenol-based antioxidant) and 0.03 parts by weight of Irgafos168 (BASF, phosphorus-based stabilizer) were added as heat stabilizers. Then, the mixture was melt-kneaded at a cylinder and die temperature of 290°C using a vented twin-screw extruder (KZW15-25MG, Technovel Corp.) to obtain a polycarbonate resin composition. The obtained polycarbonate resin composition was dried at 120°C for 12 hours or more, and then a resin plate for evaluation was molded using an injection molding machine. The evaluation results are shown in Table 5.

[0126] [Comparative Example 4] <Production of polycarbonate resin> It was produced in the same manner as in Comparative Example 1. <Production of polycarbonate resin composition> 0.1 parts by weight of Irganox1076 (BASF, hindered phenol-based antioxidant) and 0.03 parts by weight of Irgafos168 (BASF, phosphorus-based stabilizer) were added as heat stabilizers to 100 parts by weight of the obtained polycarbonate resin. Then, the mixture was melt-kneaded at a cylinder and die temperature of 290°C using a vented twin-screw extruder (KZW15-25MG, Technobel Co., Ltd.) to obtain a polycarbonate resin composition. The obtained polycarbonate resin composition was dried at 120°C for 12 hours or more, and then a resin plate for evaluation was molded using an injection molding machine. The evaluation results are shown in Table 5.

[0127] [Table 1]

[0128] [Table 2]

[0129] [Table 3]

[0130] [Table 4]

[0131] [Table 5] [Industrial Applicability]

[0132] The polycarbonate resin composition of the present invention and molded articles made thereof have excellent surface hardness, abrasion resistance, heat resistance, transparency, low water absorbency and flowability, and therefore do not require a coating treatment. They can be used for automobile interior parts, such as lamp lenses for interior lighting, display meter covers, meter dial plates, various switch covers, display covers, heat control panels, instrument panels, center clusters, center panels, room lamp lenses, various display devices such as head-up displays, protective parts, and light-transmitting parts.

Claims

1. A structural unit (a) represented by the following formula (1), and 【Chemistry 1】 (In formula (1), R １ , R ２ and R ３ each independently represents a hydrogen atom, a halogen atom, or an alkyl group having 1 to 3 carbon atoms; R ４ represents an alkyl group having 1 to 12 carbon atoms, an aryl group having 6 to 12 carbon atoms, or an aryl-substituted alkyl group having 7 to 13 carbon atoms, and n and m each independently represent an integer of 1 to 4. A structural unit (b) represented by the following formula (2): 【Chemistry 2】 (In formula (2), R ５ and R ６ each independently represents a hydrogen atom, a halogen atom, or an alkyl group having 1 to 3 carbon atoms, o and p each independently represent an integer of 1 to 4, and X is a single bond or at least one group selected from the group consisting of the following formula (3): 【Chemistry 3】 (In formula (3), R ７ , R ８ , R ９ , R １０ , R １１ , R １２ , R １３ and R １４ each independently represents at least one group selected from the group consisting of a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an aryl group having 6 to 14 carbon atoms, and an aralkyl group having 7 to 20 carbon atoms; R １５ and R １６ each independently represents at least one group selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group having 1 to 18 carbon atoms, an alkoxy group having 1 to 10 carbon atoms, a cycloalkyl group having 6 to 20 carbon atoms, a cycloalkoxy group having 6 to 20 carbon atoms, an alkenyl group having 2 to 10 carbon atoms, an aryl group having 6 to 14 carbon atoms, an aryloxy group having 6 to 10 carbon atoms, an aralkyl group having 7 to 20 carbon atoms, an aralkyloxy group having 7 to 20 carbon atoms, a nitro group, an aldehyde group, a cyano group, and a carboxyl group, and when there are a plurality of groups, they may be the same or different, a is an integer from 1 to 10, and b is an integer from 4 to 7. The polycarbonate resin composition contains 100 parts by weight of a polycarbonate resin (A) containing 70 mol % or more of the above based on all structural units, and 0.01 to 10 parts by weight of a fatty acid ester (B).

2. 2. The polycarbonate resin composition according to claim 1, wherein the content of the structural unit (a) is 10 mol % or more based on all structural units.

3. 2. The polycarbonate resin composition according to claim 1, wherein the structural unit (a) is a structural unit derived from 2-phenyl-3,3-bis(4-hydroxyphenyl)phthalimidine or 2-phenyl-3,3-bis(4-hydroxy-3-methylphenyl)phthalimidine.

4. 2. The polycarbonate resin composition according to claim 1, wherein the fatty acid ester (B) has 80 or less carbon atoms.

5. 2. The polycarbonate resin composition according to claim 1, wherein the fatty acid ester (B) is a fatty acid ester derived from a monocarboxylic acid having 30 or less carbon atoms.

6. 2. The polycarbonate resin composition according to claim 1, wherein the fatty acid ester (B) is a fatty acid ester derived from an alcohol having 30 or less carbon atoms.

7. 2. The polycarbonate resin composition according to claim 1, which has a pencil hardness of H or more as measured in accordance with JIS K5600.

8. The polycarbonate resin composition according to claim 1, which has a glass transition temperature of 140 to 300°C.

9. The melt volume rate (300°C, 1.2 kgf (11.8 N)) measured in accordance with ISO 1133 is 3 to 50 cm ３ 2. The polycarbonate resin composition according to claim 1, wherein the heat treatment is carried out at a rate of 1000° C. / 10 min.

10. 2. The polycarbonate resin composition according to claim 1, which has a haze value of 1.50% or less as measured on a molded plate having a thickness of 2 mm.

11. 2. The polycarbonate resin composition according to claim 1, which has a saturated water absorption of 1.0% or less as measured in accordance with JIS K7209:2000.

12. 2. The polycarbonate resin composition according to claim 1, which has a gloss change rate of 75% or less as measured by the following method: Measurement method: Using a rubbing tester IMC-1507 manufactured by Imoto Manufacturing Co., Ltd., the test was carried out under the conditions of using polishing paper 261X manufactured by 3M Japan Ltd. as the abrasive paper, a load of 9 N, a reciprocating speed of 30 reciprocations / min, and a number of reciprocations of 5 times, and then using a handy gloss meter manufactured by Nippon Denshoku Industries Co., Ltd., the change in reflectance at 20° was evaluated.

13. A molded article obtained by injection molding the polycarbonate resin composition according to any one of claims 1 to 12.

14. A sheet or film obtained by extrusion molding the polycarbonate resin composition according to any one of claims 1 to 12.

15. An automobile interior part using the molded article according to claim 13 or the sheet or film according to claim 14.

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