JP6472321B2 - Polycarbonate resin composition and molded article comprising the same - Google Patents

Description

  The present invention relates to a polycarbonate resin composition having a significantly improved slidability while maintaining the transparency inherent in the polycarbonate resin, and a molded product comprising the same.

  Polycarbonate resins are excellent in performance such as transparency, heat resistance, impact resistance and flame retardancy, and are therefore widely used in many products in the fields of electricity, electronics, IT and the like. In addition, in this field, there are many uses that require sliding properties, and materials that have these properties in a well-balanced manner are required in the market.

  As a technique for imparting slidability to a polycarbonate resin, a method (Patent Document 1) is proposed in which a silicone oil having a viscosity of 1000 to 20000 cp is blended with a polycarbonate resin.

  However, in the method of blending silicone oil, there is a problem that the appearance of the molded product is poor due to the bleeding of silicone oil, and further, it is not always sufficient in terms of maintaining long-term slidability. There was a need for improvement.

  Further, as a technique for imparting slidability, a resin composition in which a polytetrafluoroethylene resin is blended with a polycarbonate resin has been proposed (Patent Document 2). However, although the slidability is improved by blending the polytetrafluoroethylene resin, there is a problem that the transparency which is an advantage of the polycarbonate resin is greatly reduced and the impact resistance of the polycarbonate resin is impaired. Improvements were sought.

JP 2000-143965 A JP-A-1-259059

  It is an object of the present invention to provide a polycarbonate resin composition and a molded article comprising the polycarbonate resin composition having remarkably improved slidability while maintaining the transparency inherent in the polycarbonate resin.

  As a result of intensive studies to solve such problems, the present inventors have been surprised by including a specific amount of a specific polyether derivative, a phosphite compound, and a fatty acid ester in a polycarbonate resin. In addition, the present inventors have found that a polycarbonate resin fat composition having excellent slidability while maintaining transparency can be obtained.

（式中、Ｒ ^１ は、炭素数１〜２０のアルキル基を示し、ａは、０〜３の整数を示す） That is, the present invention is to provide a polycarbonate resin (A) 100 parts by weight of, 0.2 to 3.0 parts by weight of Po Rieteru derivative (B), phosphorous acid ester-based compound (C) 0.005 to 1 .0 parts by weight, and 0.5 to 1.0 part by weight having free fatty acid ester (D), polyether derivative (B) is a tetramethylene glycol derivative represented by the following general formula (2), The phosphite compound (C) is at least a compound represented by the following general formula (3), and the fatty acid ester (D) is glycerin monostearate or pentaerythritol tetrastearate. The present invention provides a polycarbonate resin composition and a molded product obtained by molding the polycarbonate resin composition.
General formula (2):
_{HO- (CH 2 CH 2 CH 2} CH 2 O) m (CH 2 CH (CH 3) O) n-H (2)
(In the formula, m and n each independently represent an integer of 3 to 60, and m + n represents an integer of 8 to 90.)
General formula (3):

(In the formula, R ¹ represents an alkyl group having 1 to 20 carbon atoms, and a represents an integer of 0 to 3)

  The polycarbonate resin composition of the present invention has excellent transparency and slidability without greatly impairing the thermal stability, impact strength, etc., which are the original properties of the polycarbonate resin. It can be suitably used for products that require light weight, thinning, designability, wearability, etc. in various fields such as IT, and has an extremely high industrial utility value.

  Hereinafter, embodiments will be described in detail. However, more detailed explanation than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  In addition, the inventors provide the following explanation for those skilled in the art to fully understand the present invention, and are not intended to limit the subject matter described in the claims.

  The polycarbonate resin composition used in the present invention contains a polycarbonate resin (A), a specific polyether derivative (B), a phosphite compound (C), and a fatty acid ester (D). Is. In addition, you may mix | blend another component with the polycarbonate resin composition used by this invention as needed.

  The polycarbonate resin (A) used in the present invention is obtained by a phosgene method in which various dihydroxydiaryl compounds and phosgene are reacted or a transesterification method obtained by reacting a dihydroxydiaryl compound and a carbonate such as diphenyl carbonate. It is a coalescence. A typical example is a polycarbonate resin produced from 2,2-bis (4-hydroxyphenyl) propane (bisphenol A).

  As the dihydroxydiaryl compound, in addition to bisphenol A, for example, bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, 2,2-bis (4-hydroxyphenyl) butane, 2,2-bis (4-hydroxyphenyl) octane, bis (4-hydroxyphenyl) phenylmethane, 2,2-bis (4-hydroxyphenyl-3-methylphenyl) propane, 1,1-bis (4-hydroxy) -3-tert-butylphenyl) propane, 2,2-bis (4-hydroxy-3-bromophenyl) propane, 2,2-bis (4-hydroxy-3,5-dibromophenyl) propane, 2,2- Bis (hydroxyaryl) alkanes such as bis (4-hydroxy-3,5-dichlorophenyl) propane; -Bis (hydroxyaryl) cycloalkanes such as bis (4-hydroxyphenyl) cyclopentane and 1,1-bis (4-hydroxyphenyl) cyclohexane; 4,4'-dihydroxydiphenyl ether, 4,4'-dihydroxy-3 Dihydroxy diaryl ethers such as 4,3'-dimethyldiphenyl ether; dihydroxy diaryl sulfides such as 4,4'-dihydroxydiphenyl sulfide; 4,4'-dihydroxydiphenyl sulfoxide, 4,4'-dihydroxy-3,3'-dimethyl Dihydroxy diaryl sulfoxides such as diphenyl sulfoxide; dihydroxy diaryl sulfones such as 4,4′-dihydroxydiphenyl sulfone and 4,4′-dihydroxy-3,3′-dimethyldiphenyl sulfone; These may be used alone or in admixture of two or more. In addition to these, piperazine, dipiperidyl hydroquinone, resorcin, 4,4′-dihydroxydiphenyl, and the like may be mixed and used.

  Furthermore, you may mix and use the said dihydroxy diaryl compound and the trivalent or more phenol compound shown below, for example.

  Examples of the trivalent or higher phenol compound include phloroglucin, 4,6-dimethyl-2,4,6-tri- (4-hydroxyphenyl) -heptene, 2,4,6-dimethyl-2,4,6. -Tri- (4-hydroxyphenyl) -heptane, 1,3,5-tri- (4-hydroxyphenyl) -benzol, 1,1,1-tri- (4-hydroxyphenyl) -ethane and 2,2- Bis- [4,4- (4,4′-dihydroxydiphenyl) -cyclohexyl] -propane and the like.

  The viscosity average molecular weight of the polycarbonate resin (A) is preferably 10,000 to 100,000, more preferably 12,000 to 30,000. In addition, when manufacturing such a polycarbonate resin (A), a molecular weight regulator, a catalyst, etc. can be used as needed.

The polyether derivative (B) used in the present invention is represented by the following general formula (1).
General formula (1):
RO- (X-O) m (YO) n-R '(1)
(In the formula, R and R ′ each independently represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, X represents an alkylene group having 2 to 4 carbon atoms, and Y represents an alkyl group having 3 to 5 carbon atoms. In the branched alkylene group, m and n each independently represents an integer of 3 to 60, and m + n represents an integer of 8 to 90.)

Among such polyether derivatives, a tetramethylene glycol derivative is preferable, and a polyoxytetramethylene-polyoxypropylene-glycol represented by the following general formula (2) is more preferable.
General formula (2):
_{HO- (CH 2 CH 2 CH 2} CH 2 O) m (CH 2 CH (CH 3) O) n-H (2)
(In the formula, m and n each independently represent an integer of 3 to 60, and m + n represents an integer of 8 to 90.)

As the tetramethylene glycol derivative, in addition to polyoxytetramethylene-polyoxypropylene-glycol, polyoxytetramethylene-polyoxybutylene-glycol, modified tetramethylene glycol unit and 2-methyltetramethylene glycol unit modified tetra A methylene glycol derivative (for example, HO— (CH ₂ CH ₂ CH ₂ CH ₂ O) ₂₂ (CH ₂ CH ₂ CH (CH ₃ ) CH ₂ O) ₅ —H, etc.) is preferable. As a commercially available polyether derivative, as polyoxytetramethylene-polyoxypropylene-glycol, for example, polyserine DCB-2000 (weight average molecular weight 2000), polyserine DCB-1000 (manufactured by NOF Corporation) ("Polyserine" is a registered trademark), polyoxytetramethylene-polyoxybutylene-glycol, polyserine DCD-2000 (weight average molecular weight 2000), modified tetramethylene manufactured by NOF Corporation Examples of the glycol derivative include PTG-L1000, PTG-L2000, or PTG-L3000 manufactured by Hodogaya Chemical Co., Ltd. Among them, in particular, polyserine DCB-2000, polyserine DCB-1000, and the like can be suitably used.

  The weight average molecular weight of the polyether derivative (B) used in the present invention is preferably 1000 to 4000, more preferably 2000 to 3000. When the weight average molecular weight of the polyether derivative is less than 1000, there is a fear that sufficient effect of improving the light transmittance may not be expected. Conversely, when the weight average molecular weight exceeds 4000, the clouding rate increases and the light transmission is increased. The rate may decrease.

  The amount of the polyether derivative is 0.2 to 3.0 parts by weight, and more preferably 0.5 to 2.0 parts by weight with respect to 100 parts by weight of the polycarbonate resin (A). When the amount of the polyether derivative is less than 0.2 parts by weight, the effect of improving light transmittance and slidability is insufficient. On the other hand, when the amount of the polyether derivative exceeds 3.0 parts by weight, the clouding rate increases and the light transmittance decreases.

  In the polycarbonate resin composition of the present invention, a phosphite compound (C) and a fatty acid ester (D) are blended together with a specific polyether derivative (B). The combined use of these three components is beneficial for improving transparency and slidability.

As the phosphite compound (C) used in the present invention, for example, a compound represented by the following general formula (3) is particularly suitable.
General formula (3):

（式中、Ｒ^１は、炭素数１〜２０のアルキル基を示し、ａは、０〜３の整数を示す。）

(In the formula, R ¹ represents an alkyl group having 1 to 20 carbon atoms, and a represents an integer of 0 to 3)

In the general formula (3), R ¹ is an alkyl group having 1 to 20 carbon atoms, and more preferably an alkyl group having 1 to 10 carbon atoms.

  Examples of the compound represented by the general formula (3) include triphenyl phosphite, tricresyl phosphite, tris (2,4-di-t-butylphenyl) phosphite, and trisnonylphenyl phosphite. It is done. Among these, tris (2,4-di-t-butylphenyl) phosphite is particularly suitable. For example, Irgafos 168 manufactured by BASF ("Irgafos" is a registered trademark of BASF Societas Europea) is commercially available. Is available.

Examples of the phosphite compound (C) include compounds represented by the following general formula (4) in addition to the compounds represented by the general formula (3).
General formula (4):

（式中、Ｒ^２、Ｒ^３、Ｒ^５及びＲ^６は、それぞれ独立して、水素原子、炭素数１〜８のアルキル基、炭素数５〜８のシクロアルキル基、炭素数６〜１２のアルキルシクロアルキル基、炭素数７〜１２のアラルキル基又はフェニル基を示す。Ｒ^４は、水素原子又は炭素数１〜８のアルキル基を示す。Ｘは、単結合、硫黄原子又は式：−ＣＨＲ^７−（ここで、Ｒ^７は、水素原子、炭素数１〜８のアルキル基又は炭素数５〜８のシクロアルキル基を示す）で表される基を示す。Ａは、炭素数１〜８のアルキレン基又は式：＊−ＣＯＲ^８−（ここで、Ｒ^８は、単結合又は炭素数１〜８のアルキレン基を示し、＊は、酸素側の結合手であることを示す）で表される基を示す。Ｙ及びＺは、いずれか一方がヒドロキシル基、炭素数１〜８のアルコキシ基又は炭素数７〜１２のアラルキルオキシ基を示し、もう一方が水素原子又は炭素数１〜８のアルキル基を示す）。

(In the formula, R ² , R ³ , R ⁵ and R ⁶ are each independently a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, or an alkyl group having 6 to 12 carbon atoms. An alkylcycloalkyl group, an aralkyl group having 7 to 12 carbon atoms, or a phenyl group, R ⁴ represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms, X is a single bond, a sulfur atom, or a formula: —CHR; ^7- (wherein R ⁷ represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms), and A represents a group having 1 to 8 carbon atoms. Or an alkylene group of the formula: * —COR ⁸ — (wherein R ⁸ represents a single bond or an alkylene group having 1 to 8 carbon atoms, and * represents a bond on the oxygen side). Y and Z are either a hydroxyl group or an alcohol having 1 to 8 carbon atoms. A xyl group or an aralkyloxy group having 7 to 12 carbon atoms, and the other represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms).

In General formula (4), R < ² >, R < ³ >, R < ⁵ > and R < ⁶ > are respectively independently a hydrogen atom, a C1-C8 alkyl group, a C5-C8 cycloalkyl group, and C6. -12 alkylcycloalkyl group, a C7-12 aralkyl group, or a phenyl group is shown.

  Here, examples of the alkyl group having 1 to 8 carbon atoms include methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, sec-butyl group, and t-butyl. Group, t-pentyl group, i-octyl group, t-octyl group, 2-ethylhexyl group and the like. Examples of the cycloalkyl group having 5 to 8 carbon atoms include a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, and a cyclooctyl group. Examples of the alkylcycloalkyl group having 6 to 12 carbon atoms include 1-methylcyclopentyl group, 1-methylcyclohexyl group, 1-methyl-4-i-propylcyclohexyl group and the like. Examples of the aralkyl group having 7 to 12 carbon atoms include benzyl group, α-methylbenzyl group, α, α-dimethylbenzyl group and the like.

R ² , R ³ and R ⁵ are each independently preferably an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms or an alkylcycloalkyl group having 6 to 12 carbon atoms. . In particular, R ² and R ⁵ are preferably each independently a t-alkyl group such as a t-butyl group, a t-pentyl group, or a t-octyl group, a cyclohexyl group, or a 1-methylcyclohexyl group. In particular, R ³ is a carbon number such as a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, a sec-butyl group, a t-butyl group, or a t-pentyl group. It is preferably an alkyl group of 1 to 5, more preferably a methyl group, a t-butyl group or a t-pentyl group.

R ⁶ is preferably a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms, a hydrogen atom, a methyl group, an ethyl group, an n-propyl group, or an i-propyl group. , An n-butyl group, an i-butyl group, a sec-butyl group, a t-butyl group, a t-pentyl group, or the like, more preferably an alkyl group having 1 to 5 carbon atoms.

In the general formula (4), ^{R 4} represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. As a C1-C8 alkyl group, the alkyl group illustrated by description of the said R < ² >, R < ³ >, R < ⁵ > and R < ⁶ > is mentioned, for example. In particular, R ⁴ is preferably a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and more preferably a hydrogen atom or a methyl group.

In General Formula (4), X represents a single bond, a sulfur atom or a group represented by the formula: —CHR ⁷ —. Here, R ⁷ in the formula: —CHR ⁷ — represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms. Examples of the alkyl group having 1 to 8 carbon atoms and the cycloalkyl group having 5 to 8 carbon atoms include the alkyl groups and cycloalkyl groups exemplified in the description of R ² , R ³ , R ⁵ and R ⁶ , respectively. It is done. In particular, X is a single bond, a methylene group, or a methylene group substituted with a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an i-butyl group, a t-butyl group, or the like. It is preferably a single bond, and more preferably a single bond.

In the general formula (4), A represents an alkylene group having 1 to 8 carbon atoms or a group represented by the formula: * —COR ⁸ —. Examples of the alkylene group having 1 to 8 carbon atoms include a methylene group, an ethylene group, a propylene group, a butylene group, a pentamethylene group, a hexamethylene group, an octamethylene group, and a 2,2-dimethyl-1,3-propylene group. And is preferably a propylene group. R ⁸ in the formula: * —COR ⁸ — represents a single bond or an alkylene group having 1 to 8 carbon atoms. Examples of the alkylene group having 1 to 8 carbon atoms which indicates the R ^8, for example, alkylene groups exemplified in the description of the A. R ⁸ is preferably a single bond or an ethylene group. Further, * in the formula: * —COR ⁸ — is a bond on the oxygen side and indicates that the carbonyl group is bonded to the oxygen atom of the phosphite group.

In General Formula (4), one of Y and Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbon atoms, or an aralkyloxy group having 7 to 12 carbon atoms, and the other is a hydrogen atom or 1 to 1 carbon atoms. 8 represents an alkyl group. As a C1-C8 alkoxy group, a methoxy group, an ethoxy group, a propoxy group, t-butoxy group, a pentyloxy group etc. are mentioned, for example. Examples of the aralkyloxy group having 7 to 12 carbon atoms include benzyloxy group, α-methylbenzyloxy group, α, α-dimethylbenzyloxy group and the like. As a C1-C8 alkyl group, the alkyl group illustrated by description of the said R < ² >, R < ³ >, R < ⁵ > and R < ⁶ > is mentioned, for example.

  Examples of the compound represented by the general formula (4) include 2,4,8,10-tetra-t-butyl-6- [3- (3-methyl-4-hydroxy-5-t-butylphenyl). Propoxy] dibenzo [d, f] [1,3,2] dioxaphosphine, 6- [3- (3,5-di-t-butyl-4-hydroxyphenyl) propoxy] -2,4,8 , 10-Tetra-t-butyldibenzo [d, f] [1,3,2] dioxaphosphine, 6- [3- (3,5-di-t-butyl-4-hydroxyphenyl) propoxy] -4,8-di-t-butyl-2,10-dimethyl-12H-dibenzo [d, g] [1,3,2] dioxaphosphocin, 6- [3- (3,5-di-t -Butyl-4-hydroxyphenyl) propionyloxy] -4,8-di-t-butyl-2, 0-dimethyl -12H- dibenzo [d, g] [1,3,2] dioxaphosphocin, and the like. Among these, 2,4,8,10-tetra-t-butyl-6- [3- (3-methyl-4) is particularly used when the obtained polycarbonate resin composition is used in a field where optical properties are required. -Hydroxy-5-t-butylphenyl) propoxy] dibenzo [d, f] [1,3,2] dioxaphosphine is suitable, for example, Sumitizer GP ("Smilizer") manufactured by Sumitomo Chemical Co., Ltd. Is commercially available as a registered trademark.

Examples of the phosphite compound (C) include, in addition to the compound represented by the general formula (3) and the compound represented by the general formula (4), for example, represented by the general formula (5). The compound to be used can be preferably used.
General formula (5):

（式中、Ｒ^９及びＲ^１０は、それぞれ独立して、炭素数１〜２０のアルキル基又はアルキル基で置換されていてもよいアリール基を示し、ｂ及びｃは、それぞれ独立して、０〜３の整数を示す）

(Wherein R ⁹ and R ¹⁰ each independently represents an alkyl group having 1 to 20 carbon atoms or an aryl group optionally substituted with an alkyl group, and b and c each independently represents 0 Represents an integer of ~ 3)

  As the compound represented by the general formula (5), for example, ADEKA STAB PEP-36 (“ADEKA STAB” is a registered trademark) manufactured by ADEKA Corporation is commercially available.

  The amount of the phosphite ester compound (C) is 0.005 to 1.0 part by weight, 0.01 to 0.5 part by weight, and further 0.000 to 100 parts by weight of the polycarbonate resin (A). It is preferable that it is 02-0.1 weight part. When the amount of the phosphite compound (C) is less than 0.005 parts by weight, the effect of improving light transmittance and slidability is insufficient. Conversely, when the amount of the phosphite compound (C) exceeds 1.0 part by weight, the effect of improving the light transmittance and slidability is insufficient.

  As the fatty acid ester (D) used in the present invention, a usual condensation compound of an aliphatic carboxylic acid and an alcohol can be used.

  Examples of the aliphatic carboxylic acid include saturated or unsaturated monocarboxylic acid, dicarboxylic acid, and tricarboxylic acid. The aliphatic carboxylic acid includes alicyclic carboxylic acid. Among these, monocarboxylic acids and dicarboxylic acids having 6 to 36 carbon atoms are preferable, and saturated monocarboxylic acids having 6 to 36 carbon atoms are more preferable.

  Specific examples of the aliphatic carboxylic acid include, for example, palmitic acid, stearic acid, valeric acid, caproic acid, capric acid, lauric acid, arachidic acid, behenic acid, lignoceric acid, serotic acid, mellic acid, tetratriacontanoic acid , Montanic acid, glutaric acid, adipic acid, azelaic acid and the like.

  Examples of the alcohol include saturated or unsaturated monohydric alcohols and polyhydric alcohols, and these alcohols may have a substituent such as a fluorine atom, a chlorine atom, a bromine atom, or an aryl group. Among these, a saturated alcohol having 30 or less carbon atoms is preferable, and an aliphatic saturated monohydric alcohol and aliphatic saturated polyhydric alcohol having 30 or less carbon atoms are more preferable. Aliphatic alcohols include alicyclic alcohols.

  Specific examples of the alcohol include, for example, octanol, decanol, dodecanol, tetradecanol, stearyl alcohol, behenyl alcohol, ethylene glycol, diethylene glycol, glycerin, pentaerythritol, 2,2-dihydroxyperfluoropropanol, neopentylene glycol, ditrimethylol. Examples include propane and dipentaerythritol.

  Specific examples of the fatty acid ester (D) include, for example, behenyl behenate, octyldodecyl behenate, stearyl stearate, glycerol monopalmitate, glycerol monostearate, glycerol monooleate, glycerol distearate, glycerol tristearate. Rate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate, pentaerythritol tetrastearate, etc., which may be used alone or in combination of two or more. it can. Among these, stearic acid esters such as glycerin monostearate and pentaerythritol distearate, and pentaerythritol stearate are preferable. Unistar H476DP ("Unistar" is a registered trademark) manufactured by Co., Ltd., Roxyol VPG861 manufactured by Cognis, and the like are commercially available.

  The amount of fatty acid ester (D) used in the present invention is up to 1.0 part by weight per 100 parts by weight of the polycarbonate resin (A). Exceeding 1.0 part by weight is not preferable because physical properties such as permeability and impact characteristics are lowered.

  Moreover, it inject | emitted from the polycarbonate composition which mix | blended the polyether derivative (B), the phosphite compound (C), and the fatty acid ester (D) with respect to 100 weight part of polycarbonate resin (A) used for this invention. The light transmittance according to JIS K7361 of the molded piece having a thickness of 3 mm is preferably 80% or more, and more preferably 85%. If the light transmittance is less than 80%, the visibility of the molded product made of the polycarbonate resin composition may be hindered and the discovery of defects may be adversely affected.

  The fatty acid ester (D) used in the present invention acts together with the polyether derivative (B) and the phosphite compound (C), and suppresses yellowing of the obtained polycarbonate resin composition. It is a component that improves slidability.

  In addition to the above components, the polycarbonate resin composition according to the embodiment can be used, for example, depending on the use of a molded product that can obtain an ultraviolet absorber that is a component that further improves the weather resistance of the obtained polycarbonate resin composition. It can be used as appropriate.

  As the ultraviolet absorber, for example, an ultraviolet absorber usually compounded in a polycarbonate resin, such as a benzotriazole compound, a triazine compound, a benzophenone compound, or an oxalic acid anilide compound, may be used alone or in combination of two or more. Can be used.

  Examples of benzotriazole compounds include 2- (2-hydroxy-5-tert-octylphenyl) benzotriazole and 2- (3-tert-butyl-2-hydroxy-5-methylphenyl) as benzotriazole compounds. -5-chloro-2H-benzotriazole, 2- (3,5-di-tert-pentyl-2-hydroxyphenyl) -2H-benzotriazole, 2- (2H-benzotriazole-2-yl) -4-methyl-6- ( 3,4,5,6-tetrahydrophthalmylmethyl) phenol, 2- (2-hydroxy-4-octyloxyphenyl) -2H-benzotriazole, 2- (2- hydroxy-5-tert-octylphenyl) -2H-benzotriazole, 2- [2′-hydroxy-3,5-di (1,1-dimethylbenzyl) phenyl] -2H-benzotriazole, 2,2′-methylen [6] 2H-benzotriazol-2-yl) 4- (1,1,3,3-tetramethylbutyl) phenol] and the like. Of these, 2- (2-hydroxy-5-t-octylphenyl) benzotriazole and the like are particularly suitable. For example, TINUVIN 329 (TINUVIN is a registered trademark) manufactured by BASF, and Seasorb manufactured by Cypro Kasei Co., Ltd. 709, Chemisorb 79 manufactured by Chemipro Kasei Co., Ltd. and the like are commercially available.

  Examples of the triazine compound include 2,4-diphenyl-6- (2-hydroxyphenyl-4-hexyloxyphenyl) 1,3,5-triazine, 2- [4,6-bis (2,4-dimethyl). Phenyl) -1,3,5-triazin-2-yl] -5- (octyloxy) phenol, 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-[( Hexyl) oxy] phenol, and the like, for example, TINUVIN 1577 manufactured by BASF Corporation is commercially available.

  As the oxalic acid anilide compound, for example, Sanduvor VSU manufactured by Clariant Japan Co., Ltd. is commercially available.

  Examples of the benzophenone compounds include 2,4-dihydroxybenzobenzone, 2-hydroxy-4-n-octoxybenzone, and the like.

  The amount of the ultraviolet absorber (D) is 0 to 1.0 part by weight, preferably 0 to 0.5 part by weight, based on 100 parts by weight of the polycarbonate resin (A). When the amount of the ultraviolet absorber (D) exceeds 1.0 part by weight, the initial hue of the obtained polycarbonate resin composition may be lowered. Moreover, especially when the quantity of a ultraviolet absorber (D) is 0.1 weight part or more, the effect which improves the weather resistance of a polycarbonate resin composition more is show | played.

  Furthermore, the polycarbonate resin composition according to the embodiment includes, for example, other antioxidants, colorants, mold release agents, softeners, antistatic agents, impact modifiers, as long as the effects of the present invention are not impaired. Etc., polymers other than the polycarbonate resin (A), and the like may be appropriately blended.

  The production method of the polycarbonate resin composition is not particularly limited, and the polycarbonate resin (A), the specific polyether derivative (B), the phosphite compound (C), and the fatty acid ester (D), if necessary For the various additives and polymers other than the polycarbonate resin (A), the type and amount of each component are adjusted as appropriate, and these are mixed in a known mixer such as a tumbler or ribbon blender, or an extruder. And melt kneading. By these methods, pellets of the polycarbonate resin composition can be easily obtained.

  The shape and size of the pellets of the polycarbonate resin composition obtained as described above are not particularly limited, and may be any shape and size that general resin pellets have. For example, examples of the shape of the pellet include an elliptical columnar shape and a cylindrical shape. The size of the pellet is preferably about 2 to 8 mm in length, and in the case of an elliptical column, the major axis of the cross-sectional ellipse is about 2 to 8 mm and the minor axis is preferably about 1 to 4 mm. In the case of a columnar shape, the diameter of the cross-sectional circle is preferably about 1 to 6 mm. Each of the obtained pellets may be such a size, all the pellets forming the pellet aggregate may be such a size, and the average value of the pellet aggregate is this Such a size may be sufficient, and there is no limitation in particular.

  The polycarbonate resin composition of the present invention is formed by molding the polycarbonate resin composition obtained as described above.

  There is no limitation in the manufacturing method of the polycarbonate resin composition of this invention, For example, the method of shape | molding a polycarbonate resin composition by the well-known injection molding method, the compression molding method, etc. is mentioned.

  As described above, the embodiment has been described as an example of the present invention. However, the technology in the present invention is not limited to this, and can also be applied to embodiments in which changes, replacements, additions, omissions, etc. are made as appropriate.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. Unless otherwise specified, “parts” and “%” are based on weight.

The following were used as raw materials.
1. Polycarbonate resin (A):
Polycarbonate resin synthesized from bisphenol A and carbonyl chloride Caliber 200-80
(Trade name, manufactured by Sumika Stylon Polycarbonate Co., Ltd., “Caliver” is a registered trademark of Stylon Europ GmbH, viscosity average molecular weight: 15000, hereinafter referred to as “PC”)

2. Polyether derivative (B) (tetramethylene glycol derivative):
Polyoxytetramethylene polyoxypropylene glycol (random type)
Polyserine DCB-2000
(Trade name, manufactured by NOF Corporation, weight average molecular weight: 2000, hereinafter referred to as “compound B”)

3. Phosphite compound (C):
Tris (2,4-di-t-butylphenyl) phosphite represented by the following formula

イルガフォス１６８
（商品名、ＢＡＳＦ社製、以下「ＡＯ」という）

Irgaphos 168
(Product name, manufactured by BASF, hereinafter referred to as “AO”)

3. Fatty acid ester (D)
Glycerin monostearate Riquemar S-100A
(Trade name, manufactured by Riken Vitamin Co., Ltd., hereinafter referred to as “GMS”)
Pentaerythritol stearate Roxyol VPG861
(Product name, manufactured by Cognis, hereinafter abbreviated as “PETS”)

Examples 1-4 and Comparative Examples 1-4
The raw materials are collectively put into a tumbler at the ratios shown in Tables 1 and 2 and dry mixed for 10 minutes, and then melted using a twin-screw extruder (manufactured by Nippon Steel Works, TEX30α). Melt kneading was performed at a temperature of 220 ° C. to obtain pellets of a polycarbonate resin composition.

  Using the obtained pellet, according to the following method, each test specimen for evaluation was produced and used for evaluation. The results are shown in Tables 1 and 2.

(Slidability evaluation)
The pellets of the various resin compositions obtained above were dried at 120 ° C. for 4 hours or more, respectively, and then tested using an injection molding machine (manufactured by FANUC, ROBOSHOT S2000i100B) at a set temperature of 280 ° C. and an injection pressure of 60 MPa. A piece (63 × 63 × 3 mm) was prepared.
According to JIS K-7125, the obtained test piece was subjected to a load of 400 g, and the counterpart material measured the dynamic friction coefficient with respect to the polycarbonate resin.
The conditions for creating the counterpart material are as follows:
As the polycarbonate resin, a polycarbonate resin synthesized from bisphenol A and phosgene (Caliver 200-80, viscosity average molecular weight: 15000, manufactured by Sumika Stylon Polycarbonate Co., Ltd.) was used. After drying this at 125 ° C. for 4 hours or more, a counterpart material (150 × 90 × 3 mm) was prepared using an injection molding machine (manufactured by FANUC, ROBOSHOT S2000i100B) at a set temperature of 280 ° C. and an injection pressure of 60 MPa.

(Evaluation of transparency)
Using the test pieces of various resin compositions obtained above, the light transmittance of a test piece thickness of 3 mm was measured according to JIS K7361, and the light transmittance was determined to be 80% or more.

  When the polycarbonate resin composition satisfied the constituent requirements of the present invention (Examples 1 to 4), both the transparency and the sliding property were good.

  On the other hand, in the case where the polycarbonate resin composition does not satisfy the constituent requirements of the present invention, each case has some drawbacks.

In Comparative Example 1, the amount of the polyether derivative (Compound B) was less than the range defined by the present invention, and the slidability was poor.
In Comparative Example 2, the amount of the polyether derivative (Compound B) was larger than the range defined by the present invention, and the transparency was poor.
Comparative Example 3 was a case where the polyether derivative (Compound B) was not contained, and was inferior in slidability.
In Comparative Example 4, the amount of fatty acid ester (PETS) was larger than the range defined by the present invention, and the transparency was poor.

  As described above, the embodiment has been described as an example of the technique in the present invention. To that end, a detailed explanation was provided.

  Accordingly, the components described in the detailed description include not only components essential for solving the problem but also components not essential for solving the problem in order to illustrate the above technique. obtain. Therefore, it should not be immediately recognized that these non-essential components are essential as the non-essential components are described in the detailed description.

  Moreover, since the above-mentioned embodiment is for demonstrating the technique in this invention, a various change, substitution, addition, omission, etc. can be performed in a claim or its equivalent range.

  The polycarbonate resin composition of the present invention has excellent transparency and slidability without greatly impairing the thermal stability, impact strength, etc., which are the original properties of the polycarbonate resin. It can be suitably used for products that require light weight, thinning, designability, wearability, etc. in various fields such as IT, and has an extremely high industrial utility value.

Claims (4)

Of the polycarbonate resin (A) 100 parts by weight of, 0.2 to 3.0 parts by weight of Po Rieteru derivative (B), phosphorous acid ester-based compound (C) to 0.005-1.0 parts by weight, and and 0.5 to 1.0 part by weight containing organic fatty acid ester (D),
The polyether derivative (B) is a tetramethylene glycol derivative represented by the following general formula (2),
The phosphite compound (C) is a compound represented by at least the following general formula (3),
The polycarbonate resin composition, wherein the fatty acid ester (D) is glycerin monostearate or pentaerythritol tetrastearate .
General formula (2):
_{HO- (CH 2 CH 2 CH 2} CH 2 O) m (CH 2 CH (CH 3) O) n-H (2)
(In the formula, m and n each independently represent an integer of 3 to 60, and m + n represents an integer of 8 to 90.)
General formula (3):

(In the formula, R ¹ represents an alkyl group having 1 to 20 carbon atoms, and a represents an integer of 0 to 3) The compound represented by the general formula (3) is tris (2,4-di -t- butyl-phenyl) phosphite, claim 1 polycarbonate resin composition.   2. The polycarbonate resin composition according to claim 1, wherein a 3 mm thick molded piece injection-molded from the polycarbonate composition has a light transmittance of 80% or more based on JIS K7361. The molded article formed by shape | molding the polycarbonate resin composition of any one of Claims 1-3 .