JP2007326938A - Aromatic polycarbonate resin composition and resin molded product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an aromatic polycarbonate resin composition excellent in transparency, stiffness, and scratch resistance. <P>SOLUTION: The aromatic polycarbonate resin composition comprises 100 pts.wt. of an aromatic polycarbonate resin having a viscosity-average molecular weight of 10,000 to 40,000 and a structural viscosity index N of 1.2 or more and 0.01 to 40 pts.wt. of an antiplasticizer. A resin molded product is obtained by molding the aromatic polycarbonate resin composition. In a preferred embodiment, the resin molded product is subjected to annealing treatment under a temperature condition of 40°C or higher and lower than the glass transition temperature of the aromatic polycarbonate resin composition. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an aromatic polycarbonate resin composition and a resin molded body, and more specifically, for transparency, high rigidity, particularly excellent scratch resistance, and for the manufacture of housings, covers, keyboards, buttons, and switches for electrical and electronic devices. The present invention relates to a suitable aromatic polycarbonate resin composition and resin molding.

  Conventionally, aromatic polycarbonate resins have excellent transparency, impact resistance, heat resistance, etc., and the resulting molded products are also excellent in dimensional stability, etc., so housings for electrical and electronic equipment, automotive parts, etc. It is widely used as a raw material resin for manufacturing precision molded products such as optical disc-related parts. In particular, in electronic device housings, camera bodies, toiletry products, etc., products with high commercial value can be obtained by taking advantage of their beautiful appearance.

  Molded products made of aromatic polycarbonate resin alone have lower surface hardness than products made of metal, glass, etc., so they are inferior in scratch resistance, and if they are wiped with cloth or handled roughly, the surface will be scratched. Easy to stick. For example, there is a problem particularly in parts such as mobile phone buttons that are directly touched by human nails.

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

  Further, a method of blending a polycarbonate resin with a high hardness inorganic compound is also known, but this method has a slight effect of improving the surface hardness, and when an inorganic compound is added, the refractive index of the additive and Since the refractive index of the aromatic polycarbonate resin is different, there is a drawback that transparency, which is a major characteristic of the aromatic polycarbonate resin, is impaired.

  On the other hand, in order to obtain an aromatic polycarbonate resin excellent in transparency and rigidity, a method of adding at least one selected from the group of biphenyl compounds, terphenyl compounds and polycaprolactones to aromatic polycarbonate resins has been proposed ( For example, see Patent Documents 1 to 3). However, according to the results of the study by the present inventors, this method cannot satisfy the requirement for high scratch resistance and is still insufficient for use in the above-mentioned industrial products.

  In addition, in order to obtain an aromatic polycarbonate resin composition having excellent transparency and slidability, glass flakes having a relatively small refractive index difference from the aromatic polycarbonate resin are added to the aromatic polycarbonate resin together with polycaprolactone. A method is known (see, for example, Patent Document 4). However, this method cannot satisfy the high transparency required from the viewpoint of design.

JP 2004-295997 A JP 2000-354131 A JP 2000-239513 A JP 2000-63653 A

  An object of the present invention is to provide an aromatic polycarbonate resin composition and a resin molded article that eliminate the above-mentioned drawbacks of the prior art and are excellent in transparency, rigidity, and scratch resistance.

  As a result of intensive studies, the present inventors have determined that if an antiplasticizer is contained in an aromatic polycarbonate resin having a structural viscosity index N of a certain value or more, that is, an aromatic polycarbonate resin having a certain degree of branching or more, The knowledge that transparency, rigidity, and scratch resistance were improved was obtained. Moreover, the knowledge that the abrasion resistance was further improved by annealing the resin molded body made of this aromatic polycarbonate resin composition was obtained.

  That is, the first gist of the present invention consists of 100 parts by weight of an aromatic polycarbonate resin having a viscosity average molecular weight of 10,000 to 40,000 and a structural viscosity index N of 1.2 or more, and 0.01 to 40 parts by weight of an antiplasticizer. It exists in the aromatic polycarbonate resin composition characterized by the above-mentioned.

  The second gist of the present invention resides in a resin molded product obtained by molding the above aromatic polycarbonate resin composition.

  And in the preferable aspect of this invention, said resin molded object is annealed on the temperature conditions below 40 degreeC and the glass transition temperature of an aromatic polycarbonate resin composition.

  ADVANTAGE OF THE INVENTION According to this invention, the aromatic polycarbonate resin composition and resin molding which were excellent in transparency, rigidity, and abrasion resistance are provided.

  Hereinafter, the present invention will be described in detail. In the present specification, the “group” of various compounds may have a substituent without departing from the gist of the present invention.

  The aromatic polycarbonate resin used in the present invention can be obtained, for example, by reacting an aromatic dihydroxy compound with a carbonate precursor. At this time, a small amount of a polyhydroxy compound or the like can be used in combination. Examples of the production method include an interfacial polymerization method, a melt transesterification method, a pyridine method, a ring-opening polymerization method of a cyclic carbonate compound, and a solid phase transesterification method of a prepolymer.

  Examples of the aromatic dihydroxy compound include 2,2-bis (4-hydroxyphenyl) propane (also known as bisphenol A), 2,2-bis (3,5-dibromo-4-hydroxyphenyl) propane (also known as tetra). Bromobisphenol A), bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, 2,2-bis (4-hydroxyphenyl) butane, 2,2-bis (4 -Hydroxyphenyl) octane, 2,2-bis (4-hydroxy-3-methylphenyl) propane, 1,1-bis (3-tert-butyl-4-hydroxyphenyl) propane, 2,2-bis (4- Hydroxy-3,5-dimethylphenyl) propane, 2,2-bis (3-bromo-4-hydroxyphenyl) propane, 2,2-bis (3 -Dichloro-4-hydroxyphenyl) propane, 2,2-bis (3-phenyl-4-hydroxyphenyl) propane, 2,2-bis (3-cyclohexyl-4-hydroxyphenyl) propane, 1,1-bis ( 4-hydroxyphenyl) -1-phenylethane, bis (4-hydroxyphenyl) diphenylmethane, 2,2-bis (4-hydroxyphenyl) -1,1,1-trichloropropane, 2,2-bis (4-hydroxy) Bis (hydroxy) such as phenyl) -1,1,1,3,3,3-hexachloropropane and 2,2-bis (4-hydroxyphenyl) -1,1,1,3,3,3-hexafluoropropane Aryl) alkanes; 1,1-bis (4-hydroxyphenyl) cyclopentane, 1,1-bis (4-hydroxyphenyl) silane Bis (hydroxyaryl) cycloalkanes such as rhohexane and 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane; 9,9-bis (4-hydroxyphenyl) fluorene, Cardiostructure-containing bisphenols such as 9-bis (4-hydroxy-3-methylphenyl) fluorene; 4,4′-dihydroxydiphenyl ether, 4,4′-dihydroxy-3,3′-dimethyldiphenyl ether Dihydroxydiaryl ethers such as ter; dihydroxydiaryl sulfides such as 4,4′-dihydroxydiphenyl sulfide and 4,4′-dihydroxy-3,3′-dimethyldiphenyl sulfide; -Dihydroxydiphenyl sulfoxide, 4,4'-dihydroxy-3,3'-dimethyldiphenyl Dihydroxydiaryl sulfoxides such as sulfoxide; dihydroxydiaryl sulfones such as 4,4′-dihydroxydiphenylsulfone, 4,4′-dihydroxy-3,3′-dimethyldiphenylsulfone; hydroquinone, resorcin, 4, 4′-dihydroxydiphenyl and the like can be mentioned.

  Among the above, bis (4-hydroxyphenyl) alkanes are preferable, and 2,2-bis (4-hydroxyphenyl) propane, that is, bisphenol A is particularly preferable from the viewpoint of impact resistance. The above aromatic dihydroxy compounds may be used in combination of two or more.

  Examples of the carbonate precursor to be reacted with the aromatic dihydroxy compound include carbonyl halide, carbonate ester, haloformate, etc., specifically, phosgene; diphenyl carbonate, ditolyl carbonate. And dialkyl carbonates such as dimethyl carbonate and diethyl carbonate; and dihaloformates of divalent phenol. These carbonate precursors may also be used in combination of two or more.

  Examples of the trifunctional or higher polyfunctional aromatic compound used for imparting a branched structure include phloroglucin, 4,6-dimethyl-2,4,6-tri (4-hydroxyphenyl) heptene-2, 4 , 6-Dimethyl-2,4,6-tri (4-hydroxyphenyl) heptane, 2,6-dimethyl-2,4,6-tri (4-hydroxyphenyl) heptene-3, 1,3,5-tri Polyhydroxy compounds such as (4-hydroxyphenyl) benzene, 1,1,1-tri (4-hydroxyphenyl) ethane, 3,3-bis (4-hydroxyaryl) oxyindole (also known as Isa Chin bisphenol), 5-chloroisatin, 5,7-dichloroisatin, 5-bromoisatin and the like. Of these, 1,1,1-tri (4-hydroxyphenyl) ethane is preferred. The polyfunctional aromatic compound can be used by substituting a part of the aromatic dihydroxy compound, and the amount used thereof is usually 0.01 to 10 mol%, preferably 0.8%, based on the aromatic dihydroxy compound. 1 to 2 mol%.

  Next, a method for producing an aromatic polycarbonate resin by an interfacial polymerization method will be described. In this production method, the polymerization reaction is carried out in an organic solvent inert to the reaction, in the presence of an aqueous alkaline solution, usually at a pH of 9 or higher, an aromatic dihydroxy compound, and, if necessary, a molecular weight modifier (terminal terminator). And an antioxidant for preventing oxidation of the aromatic dihydroxy compound, and after reacting with phosgene, a polymerization catalyst such as tertiary amine and quaternary ammonium salt is added to carry out interfacial polymerization to carry out the polymerization. -Get a bone. The addition of the molecular weight regulator is not particularly limited as long as it is from the time of phosgenation to the start of the polymerization reaction. The reaction temperature is, for example, 0 to 40 ° C., and the reaction time is, for example, several minutes to several hours.

  Examples of the organic solvent inert to the reaction include chlorinated hydrocarbons such as dichloromethane, 1,2-dichloroethane, chloroform, monochlorobenzene and dichlorobenzene, and aromatic hydrocarbons such as benzene, toluene and xylene. Moreover, as an alkali compound used for preparation of aqueous alkali solution, alkali metal hydroxides, such as sodium hydroxide and potassium hydroxide, are mentioned.

  Examples of the molecular weight regulator include compounds having a monovalent phenolic hydroxyl group. Specifically, m-methylphenol, p-methylphenol, m-propylphenol, p-propylphenol, p-tert-butylphenol, p-long chain alkyl-substituted phenol, etc. Can be mentioned. The usage-amount of a molecular weight regulator is 50-0.5 mol normally with respect to 100 mol of aromatic dihydroxy compounds, Preferably it is 30-1 mol.

  As a polymerization catalyst, tertiary amines such as trimethylamine, triethylamine, tributylamine, tripropylamine, trihexylamine and pyridine: quaternary ammonium salts such as trimethylbenzylammonium chloride, tetramethylammonium chloride, triethylbenzylammonium chloride Etc.

  Next, the manufacturing method of aromatic polycarbonate resin by the melt transesterification method is demonstrated. The polymerization reaction in this production method is a transesterification reaction between a carbonic acid diester and an aromatic dihydroxy compound. Examples of the carbonic acid diester include dialkyl carbonate compounds such as dimethyl carbonate, diethyl carbonate, and di-tert-butyl carbonate, and substituted diphenyls such as diphenyl carbonate and ditolyl carbonate. Examples thereof include a carbonate. Among these, diphenyl carbonate or substituted diphenyl carbonate is preferable, and diphenyl carbonate is particularly preferable.

  In the aromatic polycarbonate resin, the amount of terminal hydroxyl groups greatly affects the thermal stability, hydrolysis stability, color tone, etc. of the product polycarbonate. Therefore, the terminal hydroxyl group amount may be appropriately adjusted by any conventionally known method. In the melt transesterification reaction, an aromatic polycarbonate having a desired molecular weight and terminal hydroxyl group content is usually obtained by adjusting the mixing ratio of the carbonic diester and the aromatic dihydroxy compound, the degree of pressure reduction during the transesterification reaction, and the like. I can do it.

  The amount of carbonic acid diester used is usually an equimolar amount or more with respect to 1 mol of the aromatic dihydroxy compound, but is preferably 1.01-1.30 mol. As a more proactive method for adjusting the amount of terminal hydroxyl groups, there may be mentioned a method in which a terminal terminator is separately added during the reaction. Examples of the terminator include monohydric phenols, monovalent carboxylic acids, carbonic acid diesters. Is mentioned.

  Usually, a transesterification catalyst is used in the melt transesterification process. The type of transesterification catalyst is not particularly limited, but an alkali metal compound and / or an alkaline earth metal compound is preferable. In addition, auxiliary compounds such as basic boron compounds, basic phosphorus compounds, basic ammonium compounds, and amine compounds may be used in combination.

  In the transesterification reaction, the pressure is adjusted at 100 to 320 ° C. to finally reduce the pressure to 2 mmHg or less, and the melt polycondensation reaction is performed while removing by-products such as aromatic hydroxy compounds. The reaction method can be carried out by either a batch method or a continuous method, but a continuous method is preferred.

  Examples of the catalyst deactivator used in the melt transesterification method include compounds that neutralize the transesterification reaction catalyst, such as sulfur-containing acidic compounds or derivatives formed therefrom. The amount of the catalyst deactivator used is usually 0.5 to 10 equivalents, preferably 1 to 5 equivalents with respect to the alkali metal contained in the catalyst, and is usually 1 to 100 ppm, preferably 1 to 20 ppm with respect to the polycarbonate. It is a range.

  The molecular weight of the aromatic polycarbonate resin used in the present invention is usually 10,000 to 40,000, preferably 16,000 to 40,000, more preferably 20,000, as a viscosity average molecular weight [Mv] converted from the solution viscosity. 000 to 40,000, particularly preferably 25,000 to 40,000, more preferably 25,000 to 30,000. When the viscosity average molecular weight is 10,000 or more, it is suitable for applications requiring high mechanical strength, and when the viscosity average molecular weight is 40000 or less, molding processing becomes easy. Two or more aromatic polycarbonate resins having different viscosity average molecular weights may be mixed.

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

  The aromatic polycarbonate resin used in the present invention is an aromatic polycarbonate resin having a structural viscosity index N of 1.2 or more, which means that the polycarbonate resin has a branched chain.

The melting characteristics of polycarbonates are expressed by the formula: Q = K · PN (where Q is the flow rate of the molten resin (mL / sec), K is a constant, P is the pressure (kg / cm ² ), and N is the structural viscosity index) Can be displayed. In the above formula, when N = 1, Newtonian fluidity is shown, and the non-Newtonian fluidity increases as the value of N increases. That is, the flow characteristics of the melt are evaluated by the magnitude of N. In the past, attempts have been made to introduce an appropriate amount of a branched structure into a polycarbonate molecule as a means for appropriately increasing the value of N and realizing a suitable structural viscosity. An aromatic polycarbonate resin having a structural viscosity index (N) of 1.36 or more and a viscosity average molecular weight in the above range is proposed by, for example, WO 00/63275.

  Further, for example, JP-A-2004-2831 discloses a detailed description including a branched structure regarding an aromatic polycarbonate resin by a melting method (transesterification method). By selecting the conditions, the aromatic polycarbonate resin used in the present invention can be obtained.

  Examples of the branched structure contained in the aromatic polycarbonate resin obtained by the melting method (transesterification method) include the structures of the following general formulas (1) to (4).

In general formulas (1) to (4), X is a single bond, an alkylene group having 1 to 8 carbon atoms, an alkylidene group having 2 to 8 carbon atoms, a cycloalkylene group having 5 to 15 carbon atoms, or 5 to 15 carbon atoms. Or a linking group selected from the group consisting of divalent groups represented by —O—, —S—, —CO—, —SO—, —SO ₂ —.

  An aromatic polycarbonate resin having a structural viscosity index N of 1.2 or more can also be produced by a method using a branching agent when produced by a phosgene method or a melting method (a transesterification method) according to a conventional method. .

  Specific examples of the branching agent include phloroglucin, 4,6-dimethyl-2,4,6-tris (4-hydroxyphenyl) heptene-2, 4,6-dimethyl-2,4,6-tris (4-hydroxy). In addition to polyhydroxy compounds such as phenyl) heptane, 2,6-dimethyl-2,4,6-tris (4-hydroxyphenylheptene-3,1,3,5-tris (4-hydroxyphenyl) ethane, 3 , 3-bis (4-hydroxyaryl) oxindole (also known as isatin bisphenol), 5-chloruisatin bisphenol, 5,7-dichloroisatin bisphenol, 5-bromoisatin bisphenol, etc. Use of branching agent The amount is usually 0.01 to 10 mol%, preferably 0.1 to 3 mol%, based on the aromatic dihydroxy compound.

  The terminal hydroxyl group concentration of the aromatic polycarbonate resin used in the present invention is usually 1000 ppm or less, preferably 800 ppm or less, more preferably 600 ppm or less. In addition, the lower limit is usually 10 ppm, preferably 30 ppm, more preferably 40 ppm, particularly for aromatic polycarbonate resins produced by a transesterification method.

  By setting the terminal hydroxyl group concentration to 10 ppm or more, a decrease in molecular weight can be suppressed, and the mechanical properties of the resin composition tend to be further improved. Moreover, it exists in the tendency which the residence heat stability and color tone of a resin composition improve more by making terminal group hydroxyl group concentration 1000 ppm or less.

  The unit of terminal hydroxyl group concentration is the weight of the terminal hydroxyl group expressed in ppm relative to the weight of the aromatic polycarbonate resin, and the measuring method is colorimetric determination (Macromol. Chem. 88 215) by the titanium tetrachloride / acetic acid method. (Method of (1965)).

  In addition, the aromatic polycarbonate resin used in the present invention may contain an aromatic polycarbonate oligomer in order to improve the appearance of the molded product and the fluidity. The aromatic polycarbonate oligomer has a viscosity average molecular weight [Mv] of usually 1,500 to 9,500, preferably 2,000 to 9,000. The amount of the aromatic polycarbonate oligomer used is usually 30% by weight or less based on the aromatic polycarbonate resin.

  Furthermore, the aromatic polycarbonate resin used in the present invention may contain an aromatic polycarbonate resin regenerated from a used product, that is, a so-called material recycled aromatic polycarbonate resin.

  Used products include optical recording media such as optical discs, light guide plates, vehicle transparent parts such as automobile window glass, automobile headlamp lenses, and windshields, containers such as water bottles, eyeglass lenses, soundproof walls, glass windows, and waves. Examples include building materials such as plates. Also, non-conforming products, pulverized products obtained from sprues, runners, etc., or pellets obtained by melting them can be used. The ratio of the regenerated aromatic polycarbonate resin to be used is usually 80% by weight or less, preferably 50% by weight or less based on the novel aromatic polycarbonate resin.

  The antiplasticizer used in the present invention is different from a “plasticizer” generally known as a resin additive, and is blended with a resin so that it is normal plastic in a high temperature state (molten state). This is a general term for a substance that exerts a lubricating effect between molecular chains and functions like a filler in a low temperature state. Specifically, “JOURNAL OF APPLIED POLYMER SCIENCE VOL. ", PP.227-244", "POLYMER ENGINEERING AND SCIENCE, MID-NOVEMBER 1994, Vol. 34, NO. 21, PP 1613-1618".

  The antiplasticizer used in the present invention is not particularly limited as long as it functions as described above, and specific examples include compounds represented by general formulas (5) to (11). .

In formula (5), R ^{11 to} R ¹³ each independently represent a substituent, p and r each independently represent an integer of 0 to 5, q represents an integer of 0 to 4, and n Represents an integer of 0 to 5. When n is 2 or more, the n R ¹² , q, and phenylene substitutions may each be different.

N of the compound represented by the formula (5) is selected from 0 to 5. Here, when n is 0, the compound corresponds to a biphenyl compound, and when n is 1, the compound corresponds to a terphenyl compound. When n is 1 or more, the bond between benzene rings may be any of ortho, meta, and para. Furthermore, it can prevent that the heat resistance of an aromatic polycarbonate resin composition runs short by making n into 5 or less. Each phenyl group may independently have substituents R ^{11 to} R ¹³ . Preferred examples of the substituents R ^{11 to} R ¹³ include a halogen atom, an alkyl group having 1 to 3 carbon atoms, and an alkoxy group having 1 to 3 carbon atoms (for example, a methoxy group). When there are a plurality of the substituents corresponding to the substituents R ^{11 to} R ¹³ , these may be the same or different. Moreover, you may have a substituent. Furthermore, when n is 2 or more, the n R ¹² , q, and phenylene substitutions may each be different. That is, as for each unit, the same thing may connect and a different thing may connect. Furthermore, the bond between the benzene rings may be any of ortho, para, and meta. Moreover, the addition amount of the compound represented by Formula (5) is 0.01-40 weight part normally with respect to an aromatic polycarbonate, Preferably it is 2.0-10.0 weight part.

In formula (6), R ^{21 to} R ²³ each independently represent a substituent, p and r each independently represent an integer of 0 to 5, q represents an integer of 0 to 4, m And n each independently represents an integer of 1 to 5. When n is 2 or more, the n R ²² , q, and phenylene substitutions may each be different. When n and / or m is 2 or more, the respective methylene groups and phenylene groups are in no particular order.

In the compound represented by formula (6), m and n are selected between 1 and 5. By setting n and m to 5 or less, it is possible to prevent the aromatic polycarbonate resin composition from being insufficient in heat resistance. Each phenyl group may have substituents R ^{21 to} R ²³ independently. Preferred examples of the substituents R ^{21 to} R ²³ include a halogen atom, an alkyl group having 1 to 3 carbon atoms, and an alkoxy group having 1 to 3 carbon atoms (for example, a methoxy group). When there are a plurality of the substituents corresponding to the substituents R ^{21 to} R ²³ , these may be the same or different. Moreover, you may have a substituent. When n is 2 or more, the n R ²² , q ² and phenylene substitutions may each be different. That is, as for each unit, the same thing may connect and a different thing may connect. Furthermore, the bond between the benzene rings may be any of ortho, para, and meta. When n and / or m is 2 or more, the repeating units are in no particular order. That is, the unit enclosed by n and the unit enclosed by m may be connected in random order. For example, a form in which both units are alternately connected, or a form in which a unit bundled with m exists between units bundled with n may be used. Further, these linkages may be bonded to any of ortho, para, and meta. The amount of the compound represented by formula (6) is usually 0.01 to 40 parts by weight, preferably 2.0 to 10.0 parts by weight with respect to the aromatic polycarbonate.

  Further, as an antiplasticizer, for example, industrially available biphenyl compounds and / or terphenyl compounds can be employed.

  The biphenyl compound is a compound in which two benzene rings are bonded, and may have a substituent such as a chlorine atom, and is preferably a compound represented by the following general formula (7). The terphenyl compound is a compound in which three benzene rings are bonded, and may have a substituent such as a chlorine atom, preferably an orthoterphenyl compound represented by the following general formula (8): Examples thereof include a metaterphenyl compound represented by the formula (9) and a paraterphenyl compound represented by the following general formula (10).

In formula (7), R ³¹ and R ³² each independently represent a substituent, and p and q each independently represent an integer of 0 to 5.

Wherein ^{(8), R} 41 ~R ⁴³ each independently represents a substituent, p and q are each independently an integer of 0 to 5, r is an integer of 0-4.

In formula (9), R ^{51 to} R ⁵³ each independently represent a substituent, p and r each independently represent an integer of 0 to 5, and q represents an integer of 0 to 4.

In Formula (10), R ^{61 to} R ⁶³ each independently represent a substituent, p and r each independently represent an integer of 0 to 5, and q represents an integer of 0 to 4.

In the formulas (7) to (10), for example, a chlorine atom can be independently employed as a substituent for R ^{31 to} R ⁶³ . Further, it may be unsubstituted.

  Among the above, diphenyl compounds and terphenyl compounds are preferable because parabenzylbiphenyl, orthoterphenyl, and metaterphenyl are industrially easily available and have no environmental problems because they do not substantially contain halogen. In particular, metaterphenyl is more preferable because it exhibits a specific effect.

  As the polycaprolactone represented by the formula (11), a polymer of ε-caprolactone can be used. Although some of the hydrogen atoms of the methylene chain of polycaprolactone may be substituted with a halogen atom or the like, it is preferable to use polycaprolactone represented by the formula (11). The end of the polycaprolactone of formula (11) may be end-treated by esterification or the like. The average molecular weight of the polycaprolactone used in the present invention is usually 5,000 to 300,000, preferably 5,000 to 50,000, more preferably 5,000 to 30,000, particularly preferably 16,000 to 40,000, Remarkably preferably, it is 18000-30000.

  In addition, the above-mentioned polycaprolactone may be a mixture of two or more kinds of polymers and / or copolymers having different raw material components as long as the effects of the present invention are not impaired. For example, for the purpose of further improving the heat resistance, a polymer or oligomer having a polybutylene terephthalate structure can be copolymerized.

  Two or more kinds of the compounds represented by the general formulas (5) to (11) may be used in combination. Furthermore, you may use together with another plasticizer.

  The addition amount of the antiplasticizer is usually 0.01 to 40 parts by weight, preferably 2.0 to 20.0 parts by weight (as the total amount in the case of using plural kinds) with respect to 100 parts by weight of the aromatic polycarbonate resin. Parts, more preferably 2.0 to 10 parts by weight. When the anti-plasticizer component is less than 0.01 parts by weight, the rigidity and scratch resistance are not sufficient, and when it exceeds 40 parts by weight, the mechanical properties are lowered and the amount of gas generated during the molding process increases. , The moldability becomes worse.

  The aromatic polycarbonate resin composition of the present invention may contain other resins and various resin additives as long as the purpose of the present invention is not impaired. Examples of other resins include thermoplastic polyester resins such as polyethylene terephthalate resin, polytrimethylene terephthalate, polybutylene terephthalate resin; polystyrene resin, high impact polystyrene resin (HIPS), acrylonitrile-styrene copolymer (AS resin), Styrene resins such as acrylonitrile-butadiene-styrene copolymer (ABS resin), acrylonitrile-styrene-acrylic rubber copolymer (ASA resin), acrylonitrile-ethylenepropylene rubber-styrene copolymer (AES resin); polyethylene resin Polyamide resins; Polyimide resins; Polyetherimide resins; Polyurethane resins; Polyphenylene ether resins; Polyphenylene sulfide trees ; Polysulfone resins; and polymethacrylate resins and the like, which may be used in combination of two or more.

  In addition, as various resin additives, heat stabilizers, antioxidants, mold release agents, ultraviolet absorbers, dyes and pigments, flame retardants, antistatic agents, antifogging agents, lubricants / antiblocking agents, fluidity improvers, Plasticizers, dispersants, antibacterial agents and the like can be mentioned. Two or more of these may be used in combination. Hereinafter, an example of an additive suitable for the thermoplastic resin composition of the present invention will be specifically described.

  Examples of the heat stabilizer include phosphorus compounds. As the phosphorus compound, any conventionally known compound can be used. Specifically, phosphorus oxo acids such as phosphoric acid, phosphonic acid, phosphorous acid, phosphinic acid, polyphosphoric acid, acidic pyrophosphate metal salts such as acidic sodium pyrophosphate, acidic potassium pyrophosphate, acidic calcium pyrophosphate, potassium phosphate , Sodium phosphate, cesium phosphate, zinc phosphate group 1 or group 2B metal phosphates, organic phosphate compounds, organic phosphite compounds, organic phosphonite compounds, and the like. In these, the organic phosphate compound represented by the following general formula (12) and / or the organic phosphite compound represented by the following general formula (13) are preferable.

  In formula (12), R is an alkyl group or an aryl group, and may be the same or different. m is an integer of 0-2.

  In formula (13), R 'is an alkyl group or an aryl group, and may be the same or different.

  In formula (12), R is an alkyl group having 1 to 30 carbon atoms or an aryl group having 6 to 30 carbon atoms, and preferably an alkyl group having 2 to 25 carbon atoms. M is 1 or 2. In Formula (13), R ′ is an alkyl group having 1 to 30 carbon atoms or an aryl group having 6 to 30 carbon atoms.

  Specific examples of the phosphite represented by the formula (13) include distearyl pentaerythritol diphosphite, bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite, bis (2,6- And di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite.

  The content of the phosphorus compound is usually 0.001 to 1 part by weight, preferably 0.01 to 0.7 part by weight, more preferably 100 parts by weight in total of the aromatic polycarbonate resin and the antiplasticizer. 0.03 to 0.5 parts by weight.

  Examples of the antioxidant include hindered phenol antioxidants. Specific examples thereof include pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl). ) Propionate, thiodiethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], N, N′-hexane-1,6-diylbis [3- (3,5-di-) tert-butyl-4-hydroxyphenylpropionamide), 2,4-dimethyl-6- (1-methylpentadecyl) phenol, diethyl [[3,5-bis (1,1-dimethylethyl) -4-hydroxyphenyl ] Methyl] phosphoate, 3,3 ′, 3 ″, 5,5 ′, 5 ″ -hexa-tert-butyl-a, a ′, ''-(Mesitylene-2,4,6-triyl) tri-p-cresol, 4,6-bis (octylthiomethyl) -o-cresol, ethylenebis (oxyethylene) bis [3- (5-tert- Butyl-4-hydroxy-m-tolyl) propionate], hexamethylenebis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 1,3,5-tris (3,5- Di-tert-butyl-4-hydroxybenzyl) -1,3,5-triazine-2,4,6 (1H, 3H, 5H) -trione, 2,6-di-tert-butyl-4- (4 6-bis (octylthio) -1,3,5-triazin-2-ylamino) phenol and the like. Two or more of these may be used in combination.

  Among the above, pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], octadecyl-3- (3,5-di-tert-butyl-4-hydroxyphenyl) Propionate is preferred. These two phenolic antioxidants are commercially available from Ciba Specialty Chemicals under the names “Irganox 1010” and “Irganox 1076”.

  The content of the antioxidant is usually 0.001 to 1 part by weight, preferably 0.01 to 0.5 part by weight, based on 100 parts by weight of the total of the aromatic polycarbonate resin and the antiplasticizer. When the content of the antioxidant is less than 0.001 part by weight, the effect as an antioxidant is insufficient, and when it exceeds 1 part by weight, the effect reaches a peak and is not economical.

  The release agent includes at least one compound selected from the group consisting of aliphatic carboxylic acids, esters of aliphatic carboxylic acids and alcohols, aliphatic hydrocarbon compounds having a number average molecular weight of 200 to 15000, and polysiloxane silicone oil. Can be mentioned.

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

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

  Specific examples of the alcohol include octanol, decanol, dodecanol, stearyl alcohol, behenyl alcohol, ethylene glycol, diethylene glycol, glycerin, pentaerythritol, 2,2-dihydroxyperfluoropropanol, neopentylene glycol, ditrimethylolpropane, dipentaerythritol. Etc.

  In addition, said ester compound may contain aliphatic carboxylic acid and / or alcohol as an impurity, and may be a mixture of a some compound.

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

  Examples of the aliphatic hydrocarbon having a number average molecular weight of 200 to 15000 include liquid paraffin, paraffin wax, microwax, polyethylene wax, Fischer-Tropsch wax, and α-olefin oligomer having 3 to 12 carbon atoms. Here, as the aliphatic hydrocarbon, alicyclic hydrocarbon is also included. Moreover, these hydrocarbon compounds may be partially oxidized. Among these, paraffin wax, polyethylene wax, or a partial oxide of polyethylene wax is preferable, and paraffin wax and polyethylene wax are more preferable. The number average molecular weight of the aliphatic hydrocarbon is preferably 200 to 5,000. These aliphatic hydrocarbons may be a single substance or a mixture of various constituent components and molecular weights as long as the main component is within the above range.

  Examples of the polysiloxane silicone oil include dimethyl silicone oil, phenylmethyl silicone oil, diphenyl silicone oil, and fluorinated alkyl silicone. Two or more of these may be used in combination.

  Content of a mold release agent is 0.001-2 weight part normally with respect to a total of 100 weight part of aromatic polycarbonate resin and an antiplasticizer, Preferably it is 0.01-1 weight part. When the content of the release agent is less than 0.001 part by weight, the effect of the release property may not be sufficient. When the content exceeds 2 parts by weight, the hydrolysis resistance is deteriorated and the mold is contaminated during injection molding. There are problems such as.

  Specific examples of the ultraviolet absorber include organic ultraviolet absorbers such as benzotriazole compounds, benzophenone compounds, and triazine compounds in addition to inorganic ultraviolet absorbers such as cerium oxide and zinc oxide. Of these, organic ultraviolet absorbers are preferred. In particular, benzotriazole compounds, 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-[(hexyl) oxy] -phenol, 2- [4,6-bis (2, 4-Dimethylphenyl) -1,3,5-triazin-2-yl] -5- (octyloxy) phenol, 2,2 ′-(1,4-phenylene) bis [4H-3,1-benzoxazine-4- ON], [(4-methoxyphenyl) -methylene] -propanedioic acid-dimethyl ester is preferred.

  Specific examples of the benzotriazole compound include condensates of methyl-3- [3-tert-butyl-5- (2H-benzotriazol-2-yl) -4-hydroxyphenyl] propionate-polyethylene glycol. Specific examples of other benzotriazole compounds include 2-bis (5-methyl-2-hydroxyphenyl) benzotriazole, 2- (3,5-di-tert-butyl-2-hydroxyphenyl) benzotriazole, 2- (3 ′, 5′-di-tert-butyl-2′-hydroxyphenyl) -5-chlorobenzotriazole, 2- (3-tert-butyl-5-methyl-2-hydroxyphenyl) -5-chloro Benzotriazole, 2- (2′-hydroxy-5′-tert-octylphenyl) benzotriazole, 2- (3,5-di-tert-amyl-2-hydroxyphenyl) benzotriazole, 2- [2-hydroxy- 3,5-bis (α, α-dimethylbenzyl) phenyl] -2H-benzotriazole, 2,2′-methyl Ren-bis [4- (1,1,3,3-tetramethylbutyl) -6- (2N-benzotriazol-2-yl) phenol] [methyl-3- [3-tert-butyl-5- (2H- Benzotriazol-2-yl) -4-hydroxyphenyl] propionate-polyethylene glycol] condensate. Two or more of these may be used in combination.

  Of the above, preferably 2- (2′-hydroxy-5′-tert-octylphenyl) benzotriazole, 2- [2-hydroxy-3,5-bis (α, α-dimethylbenzyl) phenyl]- 2H-benzotriazole, 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-[(hexyl) oxy] -phenol, 2- [4,6-bis (2,4 -Dimethylphenyl) -1,3,5-triazin-2-yl] -5- (octyloxy) phenol, 2,2'-methylene-bis [4- (1,1,3,3-tetramethylbutyl)- 6- (2N-benzotriazol-2-yl) phenol].

  Content of a ultraviolet absorber is 0.01-3 weight part normally with respect to a total of 100 weight part of aromatic polycarbonate resin and an antiplasticizer, Preferably it is 0.1-1 weight part. When the content of the ultraviolet absorber is less than 0.01 parts by weight, the effect of improving weather resistance may be insufficient, and when it exceeds 3 parts by weight, problems such as mold deposit may occur.

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

  Examples of organic pigments and organic dyes include phthalocyanine dyes such as copper phthalocyanine blue and copper phthalocyanine green; azo dyes such as nickel azo yellow; thioindigo, perinone, perylene, quinacridone, dioxazine, and isoindolinone. And condensed polycyclic dyes such as quinophthalone; anthraquinone, heterocyclic, and methyl dyes and the like. Two or more of these may be used in combination. Of these, titanium oxide, carbon black, cyanine-based, quinoline-based, anthraquinone-based, and phthalocyanine-based compounds are preferable from the viewpoint of thermal stability.

  The content of the dye / pigment is usually 5 parts by weight or less, preferably 3 parts by weight or less, more preferably 2 parts by weight or less with respect to 100 parts by weight of the total of the aromatic polycarbonate resin and the antiplasticizer. When the content of the dye / pigment exceeds 5 parts by weight, the impact resistance may not be sufficient.

  Examples of the flame retardant include halogenated bisphenol A polycarbonate, brominated bisphenol epoxy resin, brominated bisphenol phenoxy resin, halogenated flame retardant such as brominated polystyrene, phosphate ester based flame retardant, diphenylsulfone-3,3 ′. -Organic metal salt flame retardants such as dipotassium disulfonate, potassium diphenylsulfone-3-sulfonate, potassium perfluorobutane sulfonate, and polyorganosiloxane flame retardants are preferable, but phosphate ester flame retardants are preferred.

  Specific examples of phosphate ester flame retardants include triphenyl phosphate, resorcinol bis (dixylenyl phosphate), hydroquinone bis (dixylenyl phosphate), and 4,4′-biphenol bis. (Dixylenyl phosphate), bisphenol A bis (dixylenyl phosphate), resorcinol bis (diphenyl phosphate), hydroquinone bis (diphenyl phosphate), 4,4'-biphenol bis (Diphenyl phosphate), bisphenol A bis (diphenyl phosphate) and the like. Two or more of these may be used in combination. Of these, resorcinol bis (dixylenyl phosphate) and bisphenol A bis (diphenyl phosphate) are preferred.

  The content of the flame retardant is usually 1 to 30 parts by weight, preferably 3 to 25 parts by weight, and more preferably 5 to 20 parts by weight with respect to 100 parts by weight of the total of the aromatic polycarbonate resin and the antiplasticizer. When the content of the flame retardant is less than 1 part by weight, the flame retardancy may not be sufficient, and when it exceeds 30 parts by weight, the heat resistance may decrease.

  The aromatic polycarbonate resin composition of the present invention can be produced by, for example, mixing each of the above components using a mixer and then melt-kneading. As the mixer, a Banbury mixer, a roll, a brabender, or the like is used, and for melt kneading, a single-screw kneading extruder, a twin-screw kneading extruder, a kneader, or the like is used. Further, it is possible to employ a method in which each component is not mixed in advance, or only a part of the components is mixed in advance and fed to an extruder with a feeder and melt kneaded. In particular, a method in which the antiplasticizer component is supplied to an extruder with a feeder without mixing other components and melt kneaded is preferable in terms of extrusion workability because deterioration of the working environment due to gas generation can be reduced.

  The method for producing a resin molded body from the aromatic polycarbonate resin composition of the present invention is not particularly limited, and a molding method generally employed for thermoplastic resins can also be employed. For example, general injection molding methods, ultra-high-speed injection molding methods, injection compression molding methods, two-color molding methods, hollow molding methods such as gas assist, molding methods using heat insulating molds, molding using rapid heating molds Method, foam molding (including supercritical fluid), insert molding, IMC (in-mold coating molding) molding method, extrusion molding method, sheet molding method, thermoforming method, rotational molding method, laminate molding method And a press molding method. A molding method using a hot runner method can also be adopted.

  In addition, in the present invention, from the viewpoint of reducing environmental burden such as waste reduction and cost reduction, when manufacturing a resin molded body from a resin composition, such as non-conforming product, sprue, runner, used product, etc. Recycled raw materials can be mixed with virgin materials for recycling (so-called material recycling). At this time, it is preferable to pulverize and use the recycled raw material because it can reduce problems in manufacturing a molded product. The content ratio of the recycled material is usually 70% by weight or less, preferably 50% by weight or less, and more preferably 30% by weight or less with respect to the total amount of the recycled material and the virgin material.

  In a preferred embodiment of the present invention, the resin molded body is annealed under a temperature condition of 40 ° C. or higher and lower than the glass transition temperature (Tg) of the aromatic polycarbonate resin composition. The annealing temperature is less than the above Tg, preferably 60 ° C. or higher, more preferably 70 ° C. or higher. When the annealing temperature is less than 40 ° C., the effect of improving the surface hardness cannot be expected. When the annealing temperature is Tg or more, the resin melts, which is not essential. The treatment time is usually 5 min to 200 hr, preferably 1 to 100 hr, more preferably 2 to 48 hr. When the treatment time is less than 5 min, the effect of improving the surface hardness by annealing treatment cannot be expected, and when it exceeds 200 hr, the mechanical properties of the aromatic polycarbonate resin composition are lowered. The method for the annealing treatment is not particularly limited, and a treatment method using far infrared rays can be adopted in addition to the hot air dryer adopted for the thermoplastic resin. During the annealing treatment, the resin molded body may be left standing, may be flowed in a line, or the treatment temperature may be changed in the middle.

  The aromatic polycarbonate resin composition of the present invention is characterized by transparency, high rigidity, and excellent resistance. The aromatic polycarbonate resin composition of the present invention having such features can be used in a wide range of fields. Electric / electronic devices and parts thereof, OA equipment, information terminal equipment, machine parts, home appliances, vehicles It is useful for various applications such as parts, building materials, various containers, leisure goods / miscellaneous goods, lighting equipment, etc., especially electrical / electronic equipment, OA equipment, information terminal equipment, housings for home appliances, covers, keyboards, buttons, switches. Application to components and vehicle interior parts can be expected.

  As housings, covers, keyboards, buttons, and switch members for electrical / electronic devices, OA devices, information terminal devices, display devices such as personal computers, game machines, and televisions, printers, copiers, scanners, fax machines, electronic notebooks and PDAs, Electronic desk calculator, electronic dictionary, camera, video camera, mobile phone, drive and reader for recording media, mouse, numeric keypad, CD player, MD player, portable radio, portable audio player housing, cover, keyboard, button, A switch member is mentioned.

  Examples of vehicle exterior / skin parts include headlamps and helmet shields. Examples of vehicle interior parts include an inner door handle, a center panel, an instrument panel, a console box, a luggage floor board, and a display housing for car navigation.

  EXAMPLES Hereinafter, although an Example demonstrates this invention still in detail, this invention is not limited to a following example, unless the meaning is exceeded. The raw materials used in the following examples and comparative examples are as shown in Table 1 below. The adopted evaluation methods are as follows (1) to (7).

(1) Molecular weight:
Using an Ubbelohde viscometer, the intrinsic viscosity [η] (unit dl / g) at a temperature of 20 ° C. of a solution containing methylene chloride was determined, and the Schnell viscosity formula (η = 1.23 × 10 ⁻⁴ M ^{0). .83} ).

(2) Structural viscosity index N:
A pellet of aromatic polycarbonate resin is charged into a Koka type flow tester (manufactured by Shimadzu Corporation) cylinder; nozzle diameter 1 mm, nozzle length 10 mm), the temperature is kept constant at 280 ° C., and the applied pressure P (100 to 200 kg / cm ² ) Then, the amount Q (mL / sec) of the molten resin was measured, and the respective values were obtained from the slope of the regression line obtained by plotting the logarithmic graph.

(3) Haze measurement:
In accordance with JIS K-7105, a 3 mm-thick flat plate was used as a test piece and measured with a haze meter (“NDH-2000 type” manufactured by Nippon Denshoku Industries Co., Ltd.).

(4) Flexural modulus:
Measured according to ASTM D-638.

(5) Vickers surface hardness:
A 3 mm-thick flat plate was used as a test piece, and a microhardness tester (“HM-124” manufactured by Akashi) was used, and measurement was performed under the conditions of test force: 9.807 N and time: 10 sec. For the Vickers surface hardness, a test force F was applied to the sample with a diamond indenter having a square angle of 136 °, and the test force was divided by the surface area S of the indentation obtained from the average value d of the diagonal lengths of the indentations. The value is obtained by F / S, and is given by the unit HV in the following formula (1).

In the formula (1), HV: Vickers hardness, k: constant _{(k = 1 / g n =} 1 / 9.806650 ≒ 0.102), F: test force (N), S: depression of the surface area (mm2) , D: mean of diagonal lengths in two directions of depression (mm), θ: diagonal angle of diamond indenter (136 °), g _n : standard gravity acceleration, respectively.

Examples 1-3:
Aromatic polycarbonate resin (1) 94.97 parts by weight, anti-plasticizer 5 parts by weight, heat stabilizer 0.03 parts by weight were weighed and mixed for 20 minutes by a tumbler, and then a 40 mmφ single screw extruder (made by Isuzu) A single “SV-40EXT”) was melted and kneaded at a cylinder temperature of 290 ° C., and the strand discharged from the die of the extruder was cooled and pelletized. The obtained pellets are used as raw materials, the cylinder temperature is set to 290 ° C. by an injection molding machine, and various test pieces having a thickness of 3.0 mm (total light transmittance measuring plate, surface hardness measuring plate, bending elasticity in accordance with the standard) The test piece for rate measurement) was molded and evaluated.

Examples 4 and 5:
The same procedure as in Examples 1 to 3 was performed, except that the surface hardness measurement plate and the flexural modulus measurement test piece obtained by molding were annealed. The annealing process was performed in a hot air oven at 100 ° C. for 24 hours.

Comparative Example 1:
The same procedure as in Examples 1 to 3 was performed except that no antiplasticizer was added.

Comparative Examples 2-3:
It carried out by the same method as Examples 1-3 except having used aromatic polycarbonate (2) as an aromatic polycarbonate.

  From Table 2, the following is clear.

(1) The aromatic polycarbonate resin composition obtained in Examples 1 to 3 has a higher elastic modulus than that of Comparative Example 1, and is more elastic in Examples 4 and 5 subjected to annealing treatment. The rate has improved.

(2) When comparing Comparative Examples 2 and 3, the surface hardness was improved in Comparative Example 3 due to the addition of the anti-plasticizer, and even when Examples 1 to 3 and Comparative Example 1 were compared, the anti-plasticizer In Examples 1 to 3 to which is added, the surface hardness is improved, but the effects of Examples 1 to 3 using an aromatic polycarbonate having a specific degree of branching with a structural viscosity index N of 1.2 or more are used. Can be seen to be large.

(3) In Examples 4 and 5, the resin molded bodies shown in Examples 2 and 3 were annealed. In any case, the surface hardness was dramatically improved. I understand.

Claims (7)

  An aromatic polycarbonate resin composition comprising 100 parts by weight of an aromatic polycarbonate resin having a viscosity average molecular weight of 10,000 to 40,000 and a structural viscosity index N of 1.2 or more, and 0.01 to 40 parts by weight of an antiplasticizer. .   The aromatic polycarbonate resin composition according to claim 1, wherein the aromatic polycarbonate resin is obtained by polymerizing an aromatic dihydroxy compound and a carbonic acid diester by transesterification.   The aromatic polycarbonate resin composition according to claim 1 or 2, wherein the antiplasticizer is at least one selected from the group consisting of a biphenyl compound, a terphenyl compound, and polycaprolactone.   A resin molded article obtained by molding the aromatic polycarbonate resin composition according to any one of claims 1 to 3.   The resin molded body according to claim 4, wherein the haze in the plate-shaped molded body having a thickness of 3 mm is less than 10%.   The resin molded article according to claim 4 or 5, wherein the resin molded article is annealed under a temperature condition of 40 ° C or higher and lower than a glass transition temperature of the aromatic polycarbonate resin composition.   The resin molded body according to any one of claims 4 to 6, which is a keyboard part, a button part, or a switch part for an electric / electronic device.