TWI785194B - Aromatic polycarbonate resin composition and optical molded article - Google Patents

Abstract

The present invention provides an aromatic polycarbonate resin composition, which is a polycarbonate-based resin composition containing an aromatic polycarbonate resin (A), a polyether derivative (B) and a specific aromatic compound (C) , and containing 0.1 to 2.0 parts by weight of the polyether derivative (B) and 0.0001 to less than 0.05 parts by weight of the aromatic compound (C) relative to 100 parts by weight of the aromatic polycarbonate resin (A).

Description

Aromatic polycarbonate resin composition and optical molded article

The present invention relates to an aromatic polycarbonate resin composition and an optical molded article.

Polycarbonate resin has previously been used in molded products such as light guide plates, various lenses, and nameplates due to its excellent impact resistance, heat resistance, and transparency.

For example, Patent Document 1 discloses an aromatic polycarbonate resin composition for a light guide plate prepared by blending a stabilizer and a release agent into an aromatic polycarbonate resin having a specific molecular weight and a specific molecular weight distribution.

Patent Document 2 discloses a polycarbonate for optical moldings in which a fluorescent whitening agent is blended into a polycarbonate resin in which a specific amount of bead-shaped cross-linked acrylic resin with a specific diameter is blended. Ester resin composition.

In addition, as disclosed in Patent Documents 3 to 6, for example, various resin compositions in which polycarbonate resin is used in combination with other materials have been proposed in order to obtain excellent light transmittance and improve the brightness of optical members. [Prior Art Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open No. 2007-204737 [Patent Document 2] Japanese Patent Laid-Open No. 09-020860 [Patent Document 3] Japanese Patent Laid-Open No. 2011-133647 [Patent Document 4] Japanese Patent Laid-Open No. 11-158364 [Patent Document 5] Japanese Patent Laid-Open No. 2001-215336 [Patent Document 6] Japanese Patent Laid-Open No. 2004-051700

[Problem to be solved by the invention]

However, the polycarbonate resin compositions disclosed in Patent Documents 3 to 6 cannot sufficiently satisfy recent demands as materials for light guide plates (especially when molding is performed at a high temperature for thin-wall molding). There are also no requirements such as reduction of light transmittance). Furthermore, in recent years, there has been a demand for a material that has excellent transparency even when a thin molded product (such as a light guide plate) of about 0.3 mm after molding is exposed to high temperature conditions such as light irradiation for an extremely long period of time. Less reduction (white turbidity or less coloration).

The object of the present invention is to provide an aromatic polycarbonate resin composition, which does not impair the heat resistance, mechanical strength and other characteristics of polycarbonate resin, and has excellent thermal stability, high light transmittance, and can be processed by molding. Thin molded products of about 0.3 mm (such as light guide plates) are less prone to decrease in transparency (white turbidity and coloring) even when they are exposed to high temperatures caused by light irradiation for an extremely long period of time. [Technical means to solve the problem]

The inventors of the present invention conducted diligent research to solve this problem, and as a result, found that an aromatic polycarbonate resin containing a specific amount of aromatic polycarbonate resin (A), a polyether derivative (B) and a specific aromatic compound (C) The polycarbonate resin composition does not damage the original heat resistance and mechanical strength of polycarbonate resin, and has excellent thermal stability, high light transmittance, and a thin molded product (light guide plate) of about 0.3 mm after molding ) even when exposed to high temperature conditions due to light source irradiation for a long time, the decrease in transparency is less (it is less likely to cause white turbidity or coloring), and the present invention has been completed.

[發明之效果]That is, the present invention provides an aromatic polycarbonate resin composition containing an aromatic polycarbonate resin (A), a polyether-derived The substance (B) and the aromatic compound (C) represented by the following formula contain 0.1 to 2.0 parts by weight of a polyether derivative ( B), and 0.0001 to 0.05 parts by weight of the aromatic compound (C). Formula: [chemical 1]

[Effect of Invention]

The polycarbonate resin composition of the present invention does not impair the original heat resistance and mechanical strength of the polycarbonate resin, and has excellent thermal stability and high light transmittance. The transparency is not easy to decrease (it is not easy to produce white turbidity or coloring) in the case of high temperature conditions caused by the environment under the hot sun and/or light source irradiation. Therefore, even if it is a thin molded product (light guide plate) with a thickness of about 0.3 mm, it is not easy to change the hue and reduce the appearance (deterioration), even if it is exposed to high temperature conditions caused by the external environment or light source for a long time When used, it is not easy to reduce the transparency (it is not easy to produce white turbidity or coloring), and the industrial application value is extremely high.

The form of implementation will be described in detail below. However, there are cases where detailed descriptions more than necessary are omitted. For example, there are cases where detailed descriptions of well-understood matters are omitted or repeated descriptions of substantially the same components are omitted. The reason for this is to avoid unnecessarily redundant descriptions below and to facilitate the understanding of operators.

In addition, the inventors provide the following descriptions for the practitioners to fully understand the present invention, and do not intend to limit the subject matter described in the scope of claims by these.

The aromatic polycarbonate resin composition of the embodiment of the present invention may contain an aromatic polycarbonate resin (A), a polyether derivative (B) and a specific aromatic compound (C), and optionally contains a phosphorus-based antioxidant. Oxidizing agent (D), epoxy compound (E) and/or other components etc.

In the embodiment of the present invention, the "aromatic polycarbonate resin (A)" is a polycarbonate resin based on an aromatic compound, and there is no particular limitation as long as the aromatic polycarbonate resin composition of the present invention can be obtained. limit. Examples of such aromatic polycarbonate resins include, for example, a phosgene method in which various dihydroxydiaryl compounds are reacted with phosgene, or dihydroxydiaryl compounds are reacted with carbonates such as diphenyl carbonate. The polymer obtained by the transesterification method of the reaction. Representative examples include polycarbonate resins produced from 2,2-bis(4-hydroxyphenyl)propane (bisphenol A).

As the above-mentioned dihydroxydiaryl compound, in addition to bisphenol A, 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(hydroxyaryl)alkanes such as bis(4-hydroxy-3,5-dibromophenyl)propane and 2,2-bis(4-hydroxy-3,5-dichlorophenyl)propane; 1,1 -Bis(hydroxyaryl)cycloalkanes such as bis(4-hydroxyphenyl)cyclopentane and 1,1-bis(4-hydroxyphenyl)cyclohexane; 4,4'-dihydroxydiphenyl ether , 4,4'-dihydroxy-3,3'-dimethyl diphenyl ether and other dihydroxy diaryl ethers; 4,4'-dihydroxy diphenyl sulfide and other dihydroxy diaryl sulfides Classes; 4,4'-dihydroxydiphenylene, 4,4'-dihydroxy-3,3'-dimethyldiphenylene and other dihydroxydiaryloxides; 4,4' Dihydroxydiarylsulfones such as -dihydroxydiphenylphenone and 4,4'-dihydroxy-3,3'-dimethyldiphenylphenone. These can be used alone or in combination. In addition to these, piperidine, dipiperidylhydroquinone, resorcinol, 4,4'-dihydroxydiphenyl, etc. can be used in combination.

Furthermore, the above-mentioned dihydroxydiaryl compound and, for example, a trivalent or higher aromatic compound shown below can also be used in combination.

As the above-mentioned phenolic compound having a valence of 3 or more, for example, phloroglucinol, 4,6-dimethyl-2,4,6-tris-(4-hydroxyphenyl)-heptene, 2,4,6 -Dimethyl-2,4,6-tris-(4-hydroxyphenyl)-heptane, 1,3,5-tris-(4-hydroxyphenyl)-benzene, 1,1,1-tris- (4-hydroxyphenyl)-ethane and 2,2-bis-[4,4-(4,4'-dihydroxydiphenyl)-cyclohexyl]-propane, etc.

The viscosity average molecular weight of the aromatic polycarbonate resin (A) is preferably from 10,000 to 100,000, more preferably from 12,000 to 30,000. In addition, when producing such an aromatic polycarbonate resin (A), a molecular weight modifier, a catalyst, etc. may be used as needed.

In the embodiment of the present invention, the polyether derivative (B) is a derivative of a polyether compound, and is not particularly limited as long as the objective aromatic polycarbonate resin composition of the present invention can be obtained. Typical examples of such polyether derivatives include polyether derivatives represented by the following formula (1).

Formula 1): RO-(X-O)m(Y-O)n-R' (In the formula, R and R' independently represent a hydrogen atom or an alkyl group with 1 to 30 carbons, X represents a straight chain or branched chain with 2 to 4 carbons, and Y represents a group with 2 to 4 carbons. 5. Straight-chain or branched-chain alkylene, X and Y may be the same or different, m and n independently represent 3 to 60, m+n represents 6 to 120) The weight average molecular weight of the polyether derivative represented by formula (1) is preferably 500-8000, more preferably 1000-4000. The polyether derivative represented by formula (1) can use a commercial item.

The polyether derivative represented by formula (1) is The following formula (1-1): RO-(X-O)m(Y-O)n-R' (In the formula, R and R' independently represent a hydrogen atom or an alkyl group with 1 to 30 carbons, X represents a straight chain alkylene with 2 to 4 carbons, Y represents a branched chain chain with 2 to 5 carbons base, m and n independently represent 3 to 60, m+n represents 8 to 90) The weight average molecular weight of the polyether derivative represented by formula (1-1) is preferably 500-8000, more preferably 1000-4000. The polyether derivative represented by formula (1-1) can use a commercial item.

The polyether derivative represented by formula (1) is The following formula (1-2): RO-(X-O)m(Y-O)n-R' (In the formula, R and R' independently represent a hydrogen atom or an alkyl group with 1 to 30 carbons, X represents a straight chain alkylene with 2 to 4 carbons, Y represents a straight chain chain with 2 to 5 carbons base, X and Y can be the same or different, m and n independently represent 3 to 60, m+n represents 6 to 100) The weight average molecular weight of the polyether derivative represented by formula (1-2) is preferably 500-8000, more preferably 1000-4000. The polyether derivative represented by formula (1-2) can use a commercial item.

The polyether derivative represented by formula (1) is The following formula (1-3): RO-(X-O)m(Y-O)n-R' (In the formula, R and R' independently represent a hydrogen atom or an alkyl group with 1 to 30 carbons, X represents a branched chain alkylene with 2 to 4 carbons, Y represents a branched chain chain with 2 to 5 carbons base, X and Y can be the same or different, m and n independently represent 3-60, m+n represent 6-120) The weight average molecular weight of the polyether derivative represented by formula (1-3) is preferably 500-8000, more preferably 1000-4000. The polyether derivative represented by formula (1-3) can use a commercial item.

The polyether derivative represented by formula (1) is preferably selected from polyether derivatives represented by formula (2), polyether derivatives represented by formula (3), polyether derivatives represented by formula (4) Polyether derivatives represented by formula (5), polyether derivatives represented by formula (6), polyether derivatives represented by formula (7), polyether derivatives represented by formula (8) At least one selected from the group of ether derivatives, polyether derivatives represented by formula (9), and polyether derivatives represented by formula (10).

The polyether derivative represented by the formula (1-1) preferably comprises a polyether derivative represented by the following formula (2), a polyether derivative represented by the formula (3), a polyether derivative represented by the formula (4) At least one of the group of polyether derivatives represented by the above, polyether derivatives represented by the formula (5), and polyether derivatives represented by the formula (6).

The polyether derivative represented by the formula (1-2) preferably contains at least one selected from the group consisting of the polyether derivative represented by the formula (7) and the polyether derivative represented by the formula (8) .

The polyether derivative represented by the formula (1-3) preferably contains at least one selected from the group consisting of the polyether derivative represented by the formula (9) and the polyether derivative represented by the formula (10). .

Formula (2): HO-(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH (where m and n independently represent 3-60, m+n represent 8-90 )

As the polyether derivative represented by the formula (2), a modified diol including a 1,4-butanediol unit and a propylene glycol unit is preferable. As such polyether derivatives, commercially available products can be used, for example, POLYCERIN DCB-1000 (weight average molecular weight 1000), POLYCERIN DCB-2000 (weight average molecular weight 2000), POLYCERIN DCB-4000 manufactured by NOF Co., Ltd. (weight average molecular weight 4000) and so on. The weight average molecular weight of the polyether derivative represented by formula (2) is preferably 500-8000, more preferably 1000-4000.

Formula (3): HO-(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH ₂ CH ₂ CH(CH ₃ )CH ₂ O)nH (wherein, m and n independently represent 3 to 60, m+n Indicates 8~90)

The polyether derivative represented by formula (3) is preferably a modified diol containing a 1,4-butanediol unit and a 2-methyl-1,4-butanediol unit. As such polyether derivatives, commercially available products can be used, for example, PTG-L1000 (weight average molecular weight 1000), PTG-L2000 (weight average molecular weight 2000), or PTG-L3000 manufactured by Hodogaya Chemical Industry Co., Ltd. (weight average molecular weight 3000) and so on. The weight average molecular weight of the polyether derivative represented by formula (3) is preferably 500-8000, more preferably 1000-4000.

Formula (4): HO-(CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH (where m and n independently represent 3-60, m+n represent 8-90)

The polyether derivative represented by formula (4) is preferably a modified diol containing ethylene glycol units and propylene glycol units. As such a polyether derivative, a commercial item can be used, for example, Unilube 50DE-25 (weight average molecular weight 1750), Unilube 75DE-25 (weight average molecular weight 1400) etc. manufactured by NOF Co., Ltd. can be used. The weight average molecular weight of the polyether derivative represented by formula (4) is preferably 500-8000, more preferably 1000-4000.

Formula (5): RO-(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH (In the formula, R represents an alkyl group with 1 to 30 carbons, and m and n are independently Earth means 3~60, m+n means 8~90)

The polyether derivative represented by the formula (5) is preferably a modified diol containing a single-terminal butyl group or a single-terminal stearyl group of a 1,4-butanediol unit and a propylene glycol unit. As such polyether derivatives, commercially available products can be used, for example, POLYCERIN BC-1000 (single-end butyl group, weight average molecular weight 1000), POLYCERIN SC-1000 (single-end stearyl group) manufactured by NOF Co., Ltd. , weight average molecular weight 1000) etc. The weight average molecular weight of the polyether derivative represented by formula (5) is preferably 500-8000, more preferably 1000-4000.

Formula (6): RO-(CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH (In the formula, R represents an alkyl group with 1 to 30 carbon atoms, and m and n independently represent 3 to 30 60, m+n means 8~90)

The polyether derivative represented by the formula (6) is preferably a modified diol containing a single-terminal butyl group or a single-terminal stearyl group of an ethylene glycol unit and a propylene glycol unit. As such polyether derivatives, commercially available products can be used, for example, Unilube 50MB-11 (single-end butyl, weight average molecular weight 1000), Unilube 50MB-26 (single-end butyl, Weight average molecular weight 2000), Unilube 50MB-72 (single-end butyl, weight average molecular weight 3000), Unilube 10MS-250KB (single-end stearyl, weight average molecular weight 2000), etc. The weight average molecular weight of the polyether derivative represented by formula (6) is preferably 500-8000, more preferably 1000-4000.

Formula (7): HO-(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH ₂ CH ₂ O)nH (where m and n independently represent 3-60, m+n represent 8-90)

As the polyether derivative represented by the formula (7), a modified diol including a 1,4-butanediol unit and an ethylene glycol unit is preferable. As such a polyether derivative, a commercial item can be used, for example, POLYCERIN DC3000E (weight average molecular weight 3000), POLYCERIN DC1800E (weight average molecular weight 1800) etc. manufactured by NOF Corporation can be used. The weight average molecular weight of the polyether derivative represented by formula (7) is preferably 500-8000, more preferably 1000-4000.

Formula (8): HO-(CH ₂ CH ₂ CH ₂ CH ₂ O)pH (wherein, p represents 6 to 100)

As the polyether derivative represented by formula (8), poly-1,4-butylene glycol is preferable. As such polyether derivatives, commercially available products can be used, for example, PTG-650SN (weight average molecular weight 650), PTG-850SN (weight average molecular weight 850), PTG-1000SN ( Weight average molecular weight 1000), PTG-1400SN (weight average molecular weight 1400), PTG-2000SN (weight average molecular weight 2000), or PTG-2900 (weight average molecular weight 2900), etc. The weight average molecular weight of the polyether derivative (poly-1,4-butylene glycol) represented by formula (8) is preferably 500-8000, more preferably 1000-4000.

Formula (9): Formula: HO-(CH(CH ₃ )CH ₂ O)qH (wherein, q represents 7~120)

The polyether derivative represented by formula (9) is preferably polypropylene glycol. As such polyether derivatives, commercially available products can be used, for example, polyglycol P2000P (weight average molecular weight: 2,000) manufactured by Dow Chemical, UNIOL D-1000 (weight average molecular weight: 1,000) manufactured by NOF Co., Ltd., UNIOL D-2000 (weight average molecular weight 2000), UNIOL D-4000 (weight average molecular weight 4000), etc. The weight average molecular weight of the polyether derivative (polypropylene glycol) represented by formula (9) is preferably 500-8000, more preferably 1000-4000.

Formula (10): HO-(CH(C ₂ H ₅ )CH ₂ O)rH (wherein, r represents 6 to 100)

As the polyether derivative represented by the formula (10), polytetramethylene glycol is preferable. As such polyether derivatives, commercially available products can be used, for example, UNIOL PB-500 (weight average molecular weight 500), UNIOL PB-1000 (weight average molecular weight 1000), UNIOL PB-2000 manufactured by NOF Co., Ltd. (weight average molecular weight 2000) and so on. The weight average molecular weight of the polyether derivative (polytetramethylene glycol) represented by formula (10) is preferably 500-8000, more preferably 1000-4000.

The polyether derivative represented by the above-mentioned general formula (1) is a molded product obtained by molding an aromatic polycarbonate resin composition blended with the polyether derivative at a high temperature and having substantially high heat resistance. or higher light transmittance.

Furthermore, the polyether derivatives represented by the above formulas (1) to (10) may include those described in each formula as long as the objective aromatic polycarbonate resin composition and optical molded article of the present invention can be obtained. Repeating units other than repeating units. Such repeating units include, for example, repeating units based on impurities that may be contained in starting materials of polyether derivatives, repeating units based on an initiator (polymerization initiator) used for polymerization, and the like.

(式中，m1＋m2對應於式(2)之m，n1＋n2對應於式(2)之n) 式(2-2)所表示之聚醚衍生物之重量平均分子量較佳為500～8000，更佳為1000～4000。When using a polymerization initiator, as a polymerization initiator, the following compound can be illustrated, for example. Examples thereof include hydrogenated bisphenol A, bisphenol A, isosorbide, glycerin, pentaerythritol, sorbitol, and glucose. As a polyether derivative containing a repeating unit based on such a polymerization initiator, for example, POLYCERIN 60DB-2000H (manufactured by NOF Co., Ltd.) conforming to the above formula (2) can be exemplified (see formula 2-2). Formula (2-2): [chemical 2]

(In the formula, m1+m2 corresponds to m in formula (2), and n1+n2 corresponds to n in formula (2)) The weight average molecular weight of the polyether derivative represented by formula (2-2) is preferably 500-8000, more preferably 1000-4000.

In addition, the polyether derivative (B) used in the present invention has moderate lipophilicity, so it is also excellent in compatibility with the aromatic polycarbonate resin (A), so it does not cause the polyether derivative to be mixed with the polyether derivative. The transparency of the molded article obtained from the aromatic polycarbonate resin composition of (B) decreases, but transparency can be maintained. The weight average molecular weight of the polyether derivative (B) is preferably 500-8000, more preferably 1000-4000.

Furthermore, the CPR (unit: dimensionless) of the polyether derivative (B) used in the present invention (Controlled Polymerization Rate: index indicating the amount of basic substances in the polyether derivative: measured in accordance with JIS K1557-4) Preferably it is 2.0 or less, More preferably, it is 1.0 or less. When the CPR is 2.0 or less, the polyether derivative (B) has excellent compatibility with the polycarbonate resin, and the decomposition and deterioration are suppressed, the storage stability is excellent, and the obtained polycarbonate resin composition is not easily affected. The hue has adverse effects. For example, the CPR of POLYCERIN DCB-2000 conforming to the polyether derivative (B) represented by the above formula (2) is less than 1.0, while that of POLYCERIN 60DB conforming to the polyether derivative (B) represented by the above formula (2) - The CPR of 2000H (manufactured by NOF Co., Ltd.) is less than 1.0, and the CPR of PTG-1000SN (manufactured by Hodogaya Chemical Industry Co., Ltd.) corresponding to the polyether derivative (B) represented by the above formula (8) is less than 1.0 up to 1.0.

Furthermore, the pH (measured according to JIS K1557-5) of the polyether derivative (B) used in the present invention is preferably 5.0 or more and less than 7.5, more preferably 6.0 or more and less than 7.0. When the pH of the polyether derivative (B) is 5.0 or more and less than 7.5, decomposition and deterioration are suppressed, the storage stability is excellent, and the hue of the obtained polycarbonate resin composition is less likely to be adversely affected. For example, the pH value of POLYCERIN DCB-2000 conforming to the polyether derivative (B) represented by the above formula (2) is 6.7, and the pH value of POLYCERIN 60DB conforming to the polyether derivative (B) represented by the above formula (2) The pH value of -2000H (manufactured by NOF Co., Ltd.) is 6.8, which corresponds to the pH value of PTG-1000SN (manufactured by Hodogaya Chemical Industry Co., Ltd.) of the polyether derivative (B) represented by the above formula (8) is 6.7.

Furthermore, the temperature at which the polyether derivative (B) used in the present invention becomes 90% by weight (or the temperature at which the rate of weight loss becomes 10%) (measured by thermogravimetry according to JIS K7120) is preferably 300°C or higher , more preferably above 330°C. When the temperature at which 90% by weight of the polyether derivative (B) becomes 90% by weight is 300°C or higher, decomposition and deterioration are suppressed, the storage stability is excellent, and the hue of the obtained polycarbonate resin composition is less likely to be adversely affected . For example, the temperature at which 90% by weight of POLYCERIN DCB-2000 of the polyether derivative (B) represented by the above-mentioned formula (2) is 330°C, and that of the polyether derivative (B) represented by the above-mentioned formula (2) B) The temperature at which 90% by weight of POLYCERIN 60DB-2000H (manufactured by NOF Corporation) becomes 400°C.

The quantity of a polyether derivative is 0.1-2.0 weight part with respect to 100 weight part of aromatic polycarbonate resins (A), Preferably it is 0.3-1.8 weight part. When the amount of the polyether derivative is less than 0.1 parts by weight, the effect of improving light transmittance and hue may not be sufficient. On the contrary, when the amount of the polyether derivative exceeds 2.0 parts by weight, the haze increases and the light transmittance may decrease.

The aromatic polycarbonate resin composition of embodiment of this invention contains the aromatic compound (C) of a polyether derivative (B) and the following formula as an essential component. In this way, by using the polyether derivative (B) and the aromatic compound (C) in combination, it is possible to maintain the excellent optical characteristics required for optical molded articles, and to prevent molding of the obtained aromatic polycarbonate resin composition. The deterioration of the product caused by the condition of use or aging deterioration and other deterioration.

For example, it is effective to prevent thermal deterioration (white turbidity or coloring) caused by long-term light irradiation of an optical molded article molded from an aromatic polycarbonate resin composition by a light source (LED light source, etc.). If the molded article for optics is exposed to harsh conditions such as the hot sun and/or continuously exposed to light for a long period of time, the temperature of the surface of the molded article may rise. The aromatic polycarbonate contained in the aromatic polycarbonate resin composition The thermal deterioration of the carbonate resin (A) may proceed little by little. Furthermore, the polyether derivative (B) in the resin composition may be modified, which may impair the transparency (brightness or light transmittance) expected from the aromatic polycarbonate resin composition used in general optical moldings , White turbidity or coloring (deep to light coloring) occurs on the surface of the molded product.

The inventors of the present invention have studied diligently in view of this problem, and as a result, it has been conceived that the specific aromatic compound (C) of the following formula is particularly effective as a compound that suppresses deterioration such as modification of the polyether derivative (B). Adding the specific aromatic compound (C) to the polyether derivative (B), or adding it before melt-kneading to obtain an aromatic polycarbonate resin composition, suppresses the polyether derivative (B) in the molded product. ) to reduce or alleviate the phenomenon of white turbidity or coloring (dark to light coloring), thus completing the present invention. Formula: [chemical 3]

The amount of the aromatic compound (C) used in the embodiment of the present invention is 0.0001 to 0.05 parts by weight, preferably 0.0005 to 0.003 parts by weight relative to 100 parts by weight of the aromatic polycarbonate resin (A). parts by weight or less. When the amount of the aromatic compound (C) is less than 0.0001 parts by weight, the effect of suppressing cloudiness or coloration is insufficient. On the contrary, when the amount of the aromatic compound (C) is 0.05 parts by weight or more, the high-level light transmittance and hue required for optical moldings may not be achieved, which is not preferable.

The aromatic polycarbonate resin composition of embodiment of this invention can contain phosphorus antioxidant (D) further. In this way, when the aromatic polycarbonate resin composition contains the polyether derivative (B), the specific aromatic compound (C) and the phosphorus-based antioxidant (D) at the same time, it is possible to maintain the excellent performance required for improving the optical molded product. In particular, it does not degrade the initial optical properties of molded articles comprising the obtained aromatic polycarbonate resin composition, and can prevent deterioration caused by usage conditions or aging deterioration.

The phosphorus-based antioxidant is not particularly limited as long as the objective aromatic polycarbonate resin composition of the present invention can be obtained, but preferably contains a phosphite compound having the following phosphite structure. [chemical 4]

The above-mentioned phosphorus-based antioxidant (D) of the aromatic polycarbonate resin composition according to the embodiment of the present invention preferably contains a phosphite compound represented by the following formula (11) and a compound represented by the following formula (12). A compound of at least one of the phosphite compound represented, the phosphite compound represented by the following formula (13), and the phosphite compound represented by the following formula (14).

The phosphorus antioxidant (D) preferably contains, for example, a compound represented by the following formula (11).

(式中，R¹ 表示碳數1～20之烷基，a表示0～3之整數)Formula (11): [Chemical 5]

(In the formula, R1 represents an alkyl group with ¹ to 20 carbons, and a represents an integer of 0 to 3)

In the above formula (11), R ¹ is an alkyl group having 1 to 20 carbon atoms, more preferably an alkyl group having 1 to 10 carbon atoms.

As a compound represented by formula (11), for example, triphenyl phosphite, tricresyl phosphite, tris(2,4-di-tert-butylphenyl) phosphite, tris(nonylphosphite) phenyl esters), etc. Among these, especially preferred is tris(2,4-di-tert-butylphenyl)phosphite, which is commercially available, for example, as Irgafos 168 manufactured by BASF Corporation ("Irgafos" is a registered trademark of BASF Societas Europaea) Obtained sexually.

It is preferable that phosphorus antioxidant (D) contains the compound represented by following formula (12), for example.

(式中，R² 、R³ 、R⁵ 及R⁶ 分別獨立地表示氫原子、碳數1～8之烷基、碳數5～8之環烷基、碳數6～12之烷基環烷基、碳數7～12之芳烷基或苯基。R⁴ 表示氫原子或碳數1～8之烷基。X表示單鍵、硫原子或式：-CHR⁷ -(此處，R⁷ 表示氫原子、碳數1～8之烷基或碳數5～8之環烷基)所表示之基。A表示碳數1～8之伸烷基或式：﹡-COR⁸ -(此處，R⁸ 表示單鍵或碳數1～8之伸烷基，﹡表示氧側之鍵結鍵)所表示之基。Y及Z中之任一者表示羥基、碳數1～8之烷氧基或碳數7～12之芳烷氧基，另一者表示氫原子或碳數1～8之烷基)Formula (12): [Chemical 6]

(In the formula, R ² , R ³ , R ⁵ and R ⁶ independently represent a hydrogen atom, an alkyl group with 1 to 8 carbons, a cycloalkyl group with 5 to 8 carbons, and an alkyl ring with 6 to 12 carbons. Alkyl, aralkyl or phenyl with 7 to 12 carbons. R ⁴ represents a hydrogen atom or an alkyl with 1 to 8 carbons. X represents a single bond, a sulfur atom or the formula: -CHR ⁷ -(here, R ⁷ represents a hydrogen atom, an alkyl group with 1 to 8 carbons or a cycloalkyl group with 5 to 8 carbons). A represents an alkylene group with 1 to 8 carbons or the formula: *-COR ⁸ -(here where, R ⁸ represents a single bond or an alkylene group with 1 to 8 carbons, * represents the group represented by the bond on the oxygen side). Any one of Y and Z represents a hydroxyl group, an alkane with 1 to 8 carbons Oxygen or an aralkyloxy group with 7 to 12 carbons, the other represents a hydrogen atom or an alkyl group with 1 to 8 carbons)

In formula (12), R ² , R ³ , R ⁵ and R ⁶ independently represent a hydrogen atom, an alkyl group with 1 to 8 carbons, a cycloalkyl group with 5 to 8 carbons, a cycloalkyl group with 6 to 12 carbons, Alkylcycloalkyl, aralkyl having 7 to 12 carbons or phenyl.

Here, examples of the alkyl group having 1 to 8 carbon atoms include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, second-butyl, third-butyl, third-butyl Tripentyl, isooctyl, tertiary octyl, 2-ethylhexyl, etc. As a cycloalkyl group having 5-8 carbon atoms, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclooctyl group etc. are mentioned, for example. Examples of the alkylcycloalkyl group having 6 to 12 carbon atoms include 1-methylcyclopentyl, 1-methylcyclohexyl, 1-methyl-4-isopropylcyclohexyl 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.

The aforementioned R ² , R ³ and R ⁵ are preferably each independently an alkyl group having 1 to 8 carbons, a cycloalkyl group having 5 to 8 carbons, or an alkylcycloalkyl group having 6 to 12 carbons. In particular, R ² and R ⁵ are preferably each independently a tertiary butyl group, tertiary pentyl group, tertiary octyl group, cyclohexyl group or 1-methylcyclohexyl group. In particular, ^R3 is preferably methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, second butyl, third butyl, third pentyl and other alkyls with 1 to 5 carbons. group, more preferably a methyl group, a tertiary butyl group or a tertiary pentyl group.

The above ^- mentioned R6 is preferably a hydrogen atom, an alkyl group with 1 to 8 carbons or a cycloalkyl group with 5 to 8 carbons, more preferably a hydrogen atom, methyl, ethyl, n-propyl, isopropyl, n-propyl C1-5 alkyl groups such as butyl, isobutyl, second-butyl, third-butyl, and third-pentyl.

In formula (12), R ⁴ represents a hydrogen atom or an alkyl group having 1 to 8 carbons. Examples of the alkyl group having 1 to 8 carbon atoms include the alkyl groups exemplified in the description of R ² , R ³ , R ⁵ and R ⁶ above. In particular, R ⁴ is preferably a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, more preferably a hydrogen atom or a methyl group.

In formula (12), 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 carbons, or a cycloalkyl group having 5 to 8 carbons. Examples of the alkyl group having 1 to 8 carbon atoms and the cycloalkyl group having 5 to 8 carbon atoms include the alkyl group and cycloalkyl group exemplified in the description of R ² , R ³ , R ⁵ and R ⁶ above, respectively. In particular, X is preferably a single bond, methylene, or methylene substituted by methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, etc., and more preferably for a single key.

In formula (12), A represents an alkylene group having 1 to 8 carbon atoms or a group represented by the formula: *-COR ⁸ -. Examples of alkylene groups having 1 to 8 carbon atoms include methylene, ethylidene, propylidene, butylene, pentamethylene, hexamethylene, octamethylene, 2,2- Dimethyl-1,3-propylidene, etc., preferably propylidene. In addition, 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 representing R ⁸ include the alkylene groups exemplified in the description of A above. R ⁸ is preferably a single bond or an ethylene group. Also, in the formula: *-COR ⁸ -, the * is the bonding bond on the oxygen side, which means that the carbonyl group is bonded to the oxygen atom of the phosphite group.

In formula (12), any one of Y and Z represents a hydroxyl group, an alkoxy group with 1 to 8 carbons, or an aralkyloxy group with 7 to 12 carbons, and the other represents a hydrogen atom or a carbon number with 1 to 12 carbons. 8 alkyl. Examples of the alkoxy group having 1 to 8 carbon atoms include methoxy, ethoxy, propoxy, tert-butoxy, pentyloxy and the like. Examples of the aralkyloxy group having 7 to 12 carbon atoms include benzyloxy, α-methylbenzyloxy, α,α-dimethylbenzyloxy and the like. Examples of the alkyl group having 1 to 8 carbon atoms include the alkyl groups exemplified in the description of R ² , R ³ , R ⁵ and R ⁶ above.

As a compound represented by formula (12), for example, 2,4,8,10-tetra-tert-butyl-6-[3-(3-methyl-4-hydroxy-5-tert-butyl Phenyl)propoxy]dibenzo[d,f][1,3,2]dioxaphosphapane, 6-[3-(3,5-di-tert-butyl-4- hydroxyphenyl)propoxy]-2,4,8,10-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphapane, 6-[ 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propoxy]-4,8-di-tert-butyl-2,10-dimethyl-12H-dibenzo[ d,g][1,3,2]dioxaphosphooctacycline, 6-[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyloxy]-4,8 -Di-tert-butyl-2,10-dimethyl-12H-dibenzo[d,g][1,3,2]dioxaphosphacycline and the like. Among these, especially when the obtained aromatic polycarbonate resin composition is used in a field requiring optical properties, 2,4,8,10-tetra-tert-butyl-6-[ 3-(3-Methyl-4-hydroxy-5-tert-butylphenyl)propoxy]dibenzo[d,f][1,3,2]dioxaphosphopine, e.g. It is commercially available as Sumilizer GP ("Sumilizer" is a registered trademark) manufactured by Sumitomo Chemical Co., Ltd.

It is preferable that phosphorus antioxidant (D) contains the compound represented by following formula (13), for example.

(式中，R⁹ 及R¹⁰ 分別獨立地表示碳數1～20之烷基或亦可經烷基取代之芳基，b及c分別獨立地表示0～3之整數)Formula (13): [Chemical 7]

(In the formula, R ⁹ and R ¹⁰ each independently represent an alkyl group with 1 to 20 carbon atoms or an aryl group that may be substituted by an alkyl group, b and c each independently represent an integer of 0 to 3)

Examples of the compound represented by the formula (13) include bis(2,4-di-tert-butylphenyl)pentaerythritol diphosphite, phenylbisphenol A pentaerythritol diphosphite, and the like. Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite is commercially available as a brand name "Adekastab PEP-24G" manufactured by ADEKA Corporation. Adekastab PEP-36 ("Adekastab" is a registered trademark) manufactured by ADEKA Co., Ltd. is commercially available.

It is preferable that phosphorus antioxidant (D) contains the compound represented by following formula (14), for example.

Formula (14): [Chemical 8]

(In the formula, R ¹¹ to R ¹⁸ independently represent an alkyl or alkenyl group with 1 to 3 carbon atoms. R ¹¹ and R ¹² , R ¹³ and R ¹⁴ , R ¹⁵ and R ¹⁶ , R ¹⁷ and R ¹⁸ can also be are mutually bonded to form a ring. R ¹⁹ to R ²² each independently represent a hydrogen atom or an alkyl group having 1 to 20 carbons. d to g each independently represent an integer of 0 to 5. X ¹ to X ⁴ each independently represent Single bond or carbon atom. When X ¹ to X ⁴ are single bonds, among R ¹¹ to R ²² , the functional group connected to the single bond is excluded from general formula (14))

As a specific example of the compound represented by Formula (14), bis(2,4- dicumylphenyl) pentaerythritol diphosphite is mentioned, for example. It is available as the trade name "Doverphos (registered trademark) S-9228" manufactured by Dover Chemical Co., Ltd., and the trade name "Adekastab PEP-45" (bis(2,4-dicumylphenyl) pentaerythritol di Phosphites) are commercially available.

Preferably, the above-mentioned aromatic polycarbonate resin composition satisfying at least one selected from the following: The phosphite compound represented by the above formula (11) includes tris(2,4-di-tert-butylphenyl) phosphite; The phosphite compound represented by the above formula (12) includes 2,4,8,10-tetra-tert-butyl-6-[3-(3-methyl-4-hydroxyl-5-tert-butylbenzene base)propoxy]dibenzo[d,f][1,3,2]dioxaphosphapane; The phosphite compound represented by the above formula (13) includes 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa -3,9-diphosphaspiro[5,5]undecane; and The phosphite compound represented by the above-mentioned formula (14) includes bis(2,4-dicumylphenyl)pentaerythritol diphosphite.

The amount of the phosphorus antioxidant (D) is preferably at most 0.5 part by weight, more preferably 0.02 to 0.2 part by weight relative to 100 parts by weight of the aromatic polycarbonate resin (A).

In addition to the above-mentioned components, in the aromatic polycarbonate resin composition of the embodiment, according to the use of the molded article obtained by molding the aromatic polycarbonate resin composition, for example, as a further improvement of the aromatic polycarbonate resin composition obtained, it can be used appropriately. The ultraviolet absorber of the weather resistance component of polycarbonate resin composition.

As the ultraviolet absorber, for example, benzotriazole-based compounds, trioxane-based compounds, benzophenone-based compounds, oxalylaniline-based compounds, and other ultraviolet absorbers that are usually formulated in polycarbonate resins can be used alone or in combination of two or more And use.

Examples of benzotriazole-based compounds include 2-(2-hydroxy-5-tertoctylphenyl)benzotriazole, 2-(3-tert-butyl -2-Hydroxy-5-methylphenyl)-5-chloro-2H-benzotriazole (2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-5-chloro-2H-benzotriazole ), 2-(3,5-di-tert-pentyl-2-hydroxyphenyl)-2H-benzotriazole (2-(3,5-di-tert-pentyl-2-hydroxyphenyl)-2H- benzotriazole), 2-(2H-benzotriazol-2-yl)-4-methyl-6-(3,4,5,6-tetrahydrophthalimidomethyl)phenol (2 -(2H-benzotriazole-2-yl)-4-methyl-6-(3,4,5,6-tetrahydrophthalimidylmethyl)phenol), 2-(2-hydroxy-4-octyloxyphenyl)-2H-benzene Triazole (2-(2-hydroxy-4-octyloxyphenyl)-2H-benzotriazole), 2-(2-hydroxy-5-third octylphenyl)-2H-benzotriazole (2-(2- hydroxy-5-tert-octylphenyl)-2H-benzotriazole), 2-[2'-hydroxyl-3,5-bis(1,1-dimethylbenzyl)phenyl]-2H-benzotriazole (2 -[2'-hydroxy-3,5-di(1,1-dimethylbenzyl)phenyl]-2H-benzotriazole), 2,2'-methylenebis[6-(2H-benzotriazol-2-yl )4-(1,1,3,3-Tetramethylbutyl)phenol](2,2'-Methylenbis[6-(2H-benzotriazol-2-yl)4-(1,1,3,3- tetramethylbutyl)phenol]) etc. Among them, 2-(2-hydroxy-5-tertiary octylphenyl) benzotriazole and the like are particularly preferable. For example, TINUVIN 329 (TINUVIN is a registered trademark) manufactured by BASF Corporation and Shipro Kasei Co., Ltd. are commercially available. Seesorb 709 manufactured by Co., Ltd., Chemisorb 79 manufactured by Chemipro Kasei Co., Ltd., etc.

Examples of tristanoid-based compounds include: 2,4-diphenyl-6-(2-hydroxyphenyl-4-hexyloxyphenyl)1,3,5-tristannium, 2-[4,6 -bis(2,4-dimethylphenyl)-1,3,5-tris-2-yl]-5-(octyloxy)phenol, 2-(4,6-diphenyl-1, 3,5-Tri-(2-yl)-5-[(hexyl)oxy]phenol, etc., for example, TINUVIN 1577 manufactured by BASF Corporation, etc. are commercially available.

As the oxanilide-based compound, for example, Sanduvor VSU manufactured by Clariant Japan Co., Ltd. is commercially available.

Examples of benzophenone-based compounds include 2,4-dihydroxybenzophenone (2,4-dihydroxybenzophenone), 2-hydroxy-4-n-octyloxybenzophenone (2-hydroxy-4- n-octoxybenzophenone) and so on.

The quantity of an ultraviolet absorber is 0-1.0 weight part with respect to 100 weight part of aromatic polycarbonate resins (A), Preferably it is 0-0.5 weight part. When the quantity of a ultraviolet absorber exceeds 1.0 weight part, the initial stage hue of the aromatic polycarbonate resin composition obtained may fall. Moreover, when the quantity of an ultraviolet absorber is 0.1 weight part or more, especially the effect of further improving the weather resistance of an aromatic polycarbonate resin composition is exhibited largely.

The aromatic polycarbonate resin composition of embodiment of this invention may contain an epoxy compound (E). In this way, when the aromatic polycarbonate resin composition contains the polyether derivative (B), the specific aromatic compound (C) and the epoxy compound (E) at the same time, it is possible to maintain the excellent performance required for improving optical molded products. Optical properties, and does not degrade the initial optical properties of the molded article comprising the obtained aromatic polycarbonate resin composition, and prevents deterioration caused by use conditions or aging deterioration.

The epoxy compound (E) has at least one epoxy group in the molecule, and is not particularly limited as long as the objective aromatic polycarbonate resin composition of the present invention can be obtained. The epoxy compound (E) may include, for example, 3',4'-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate, epoxidized soybean oil, ε-caprolactone modified-3 ',4'-Epoxycyclohexylmethyl-3,4-epoxycyclohexane carboxylate, epoxy-containing acrylic-styrene polymer, 2,2-bis(4-hydroxycyclohexyl ) propane-diglycidyl ether, etc. The epoxy compound (E) preferably contains 3',4'-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate.

The aromatic polycarbonate resin composition according to the embodiment of the present invention preferably contains 0.001 to 0.2 parts by mass of the epoxy compound (E) with respect to 100 parts by mass of the aromatic polycarbonate resin (A), more preferably contains 0.002 to 0.1 parts by mass, preferably 0.005 to 0.05 parts by mass. When the aromatic polycarbonate resin composition according to the embodiment of the present invention contains 0.001 to 0.2 parts by mass of the epoxy compound (E) relative to 100 parts by mass of the aromatic polycarbonate resin (A), the improvement can be maintained. Excellent optical properties required for optical moldings, and improving the initial optical properties (cumulative transmittance and yellowness) of moldings containing the obtained aromatic polycarbonate resin composition, and preventing deterioration caused by usage conditions Or deterioration such as aging deterioration.

Further, in the aromatic polycarbonate resin composition of the embodiment, for example, heat stabilizers, other antioxidants, colorants, mold release agents, softeners, anti- Various additives such as static agents and impact modifiers, polymers other than aromatic polycarbonate resin (A), etc.

Regarding the aromatic polycarbonate resin composition according to the embodiment of the present invention, the following production method can be exemplified: mixing an aromatic polycarbonate resin (A), a polyether derivative (B) and a specific aromatic compound (C), A phosphorus-based antioxidant (D), an epoxy compound (E), the above-mentioned various additives, and polymers other than the aromatic polycarbonate resin (A) are mixed as necessary. The production method is not particularly limited as long as the objective aromatic polycarbonate resin composition of the present invention can be obtained, and the types and amounts of each component can be appropriately adjusted. The mixing method of the components is also not particularly limited, and examples thereof include a method of mixing using a known mixer such as a tumbler and a ribbon mixer, or a method of melt-kneading using an extruder. By these methods, pellets of the aromatic polycarbonate resin composition can be easily obtained. The specific aromatic compound (C) may be mixed before melt-kneading, or added or mixed in the polyether derivative (B) in advance.

The shape and size of the particles of the aromatic polycarbonate resin composition obtained as described above are not particularly limited as long as they have the shape and size of ordinary resin particles. For example, the shape of the particles includes an elliptical columnar shape, a cylindrical shape, and the like. The particle size is preferably about 2-8 mm in length. In the case of an elliptical column, it is preferable that the major diameter of the cross-sectional ellipse is about 2-8 mm, and the minor diameter is about 1-4 mm. In the case of a shape, the diameter of the cross-sectional circle is preferably about 1 to 6 mm. Furthermore, the size may be the same for each obtained particle, may be the same size for all the particles forming the particle aggregate, or may be the average value of the particle aggregate, and it is not particularly limited.

The optical molded article according to the embodiment of the present invention can be obtained by molding the above-mentioned aromatic polycarbonate resin composition.

The manufacturing method of the optical molded article is not particularly limited as long as the objective optical molded article of the present invention can be obtained, for example, a method of molding an aromatic polycarbonate resin composition by known injection molding method, compression molding method, etc. is mentioned.

The molded article for optics of the present invention is suitable, for example, as a light guide plate, a surface-emitting body material, a light guide film, a light guide member for vehicles, a nameplate, and the like.

As mentioned above, the form of implementation was demonstrated as an illustration of this invention. However, the technology of the present invention is not limited thereto, and can be applied to embodiments in which changes, substitutions, additions, omissions, etc. are appropriately performed. [Example]

The following examples illustrate the present invention in detail, but the present invention is not limited to these examples. In addition, unless otherwise specified, "part" and "%" are each based on weight.

The following were used as raw materials. 1. Aromatic polycarbonate resin (A): Polycarbonate resin synthesized from bisphenol A and carbonyl chloride Viscosity average molecular weight: 15000, SD Polyca 200-80 (trade name) manufactured by Sumika Polycarbonate Co., Ltd., "SD Polyca" is a registered trademark of Sumika Polycarbonate Co., Ltd., hereinafter also referred to as "PC" or (A1)

2. Polyether derivatives (B): 2-1. Modified diol containing 1,4-butanediol unit and propylene glycol unit (random copolymerization) Weight average molecular weight: 2000, pH value: 6.7 (JIS K1557-5), POLYCERIN DCB-2000 (trade name) manufactured by NOF Co., Ltd., hereinafter also referred to as (B1)

2-2. Modified diol containing 1,4-butanediol unit and propylene glycol unit (random copolymerization) Weight average molecular weight: 1000, pH value: 6.8 (JIS K1557-5), POLYCERIN DCB-1000 (trade name) manufactured by NOF Co., Ltd., hereinafter also referred to as (B2)

2-3. Modified diol containing 1,4-butanediol unit and ethylene glycol unit (random copolymerization) Weight average molecular weight: 3000, POLYCERIN DC-3000E (trade name) manufactured by NOF Co., Ltd., hereinafter also referred to as (B3)

2-4. Modified diol containing 1,4-butanediol unit and propylene glycol unit, single-terminal butyl group (random copolymerization) Weight average molecular weight: 1000, POLYCERIN BC-1000 (trade name) manufactured by NOF Co., Ltd., hereinafter also referred to as (B4)

2-5. Modified diol containing ethylene glycol unit and propylene glycol unit (random copolymerization) Weight average molecular weight: 1750, Unilube 50DE-25 (trade name) manufactured by NOF Co., Ltd., hereinafter referred to as (B5)

2-6. Modified diol containing ethylene glycol unit and propylene glycol unit, single-terminal butyl group (random copolymerization) Weight average molecular weight: 2000, Unilube 50MB-26 (trade name) manufactured by NOF Co., Ltd., hereinafter also referred to as (B6)

2-7. Polypropylene glycol Weight average molecular weight: 2000, polyglycol P2000P (trade name) manufactured by Dow Chemical, hereinafter also referred to as (B7)

2-8. Poly-1,4-butanediol Weight average molecular weight: 1000, PTG-1000SN (trade name) manufactured by Hodogaya Chemical Industry Co., Ltd., hereinafter also referred to as (B8)

2-9. Modified diol containing 1,4-butanediol unit and 2-methyl 1,4-butanediol unit (random copolymerization) Weight average molecular weight: 2000, PTG-L2000 (trade name) manufactured by Hodogaya Chemical Industry Co., Ltd., hereinafter also referred to as (B9)

3. Aromatic compound (C): 3,5-di-tert-butyl-4-hydroxytoluene [Manufactured by Wako Pure Chemical Industries, Ltd., hereinafter also referred to as (C1)]

[BASF公司製造之Irgafos168(商品名)，以下亦稱為(D1)]4. Phosphorous antioxidant (D): 4-1. Tris(2,4-di-tert-butylphenyl) phosphite represented by the following formula [Chem. 9]

[Irgafos 168 (trade name) manufactured by BASF Corporation, hereinafter also referred to as (D1)]

[住友化學股份有限公司製造之Sumilizer GP(商品名)，以下亦稱為(D2)]4-2. 2,4,8,10-tetra-tert-butyl-6-[3-(3-methyl-4-hydroxy-5-tert-butylphenyl)propane represented by the following formula Oxy]dibenzo[d,f][1,3,2]dioxaphosphapane[Chem. 10]

[Sumilizer GP (trade name) manufactured by Sumitomo Chemical Co., Ltd., hereinafter also referred to as (D2)]

[Dover Chemical公司製造之Doverphos S-9228(商品名)，以下亦稱為(D3)]4-3. Bis(2,4-dicumylphenyl)pentaerythritol diphosphite represented by the following formula (IUPAC name: 3,9-bis[2,4-bis(α,α-di Methylbenzyl)phenoxy]-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5.5]undecane) [Chem. 11]

[Doverphos S-9228 (trade name) manufactured by Dover Chemical Co., hereinafter also referred to as (D3)]

[ADEKA製造之Adekastab PEP-36(商品名)，以下亦稱為(D4)]4-4. Bis(2,6-di-tert-butyl-4-methylphenyl)pentaerythritol diphosphite represented by the following formula (IUPAC name: 3,9-bis(2,6-di -tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane) [Chem. 12]

[Adekastab PEP-36 (trade name) manufactured by ADEKA, hereinafter also referred to as (D4)]

5. Epoxy compound (E) 3',4'-Epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylate [Celloxide 2021P (trade name) manufactured by Diacel Chemical Industries Co., Ltd., hereinafter also referred to as (E1)]

(Examples 1 to 33 and Comparative Examples 1 and 2) The above-mentioned raw materials were put into the drum at the ratio shown in Table 1 to Table 4, and after 10 minutes of dry mixing, using a twin-screw extruder (manufactured by Nippon Steel Works Co., Ltd., TEX30α), at a melting temperature of 220 ° C Melt-kneading was carried out below to obtain pellets of the aromatic polycarbonate resin compositions of Examples 1-33 and Comparative Examples 1 and 2 respectively. Among them, regarding Example 7, the pellets of the aromatic polycarbonate resin composition of Example 7 were obtained by mixing the compound (C) and the compound (B) in advance, and then mixing with other raw materials. Furthermore, the particles obtained in the examples and comparative examples are all approximately elliptical columns, the average lengths of aggregates comprising 100 particles are about 5.1 mm to about 5.4 mm, and the average lengths of the major diameters of cross-sectional ellipses are About 4.1 mm to about 4.3 mm, and the average value of the short diameter is about 2.2 mm to about 2.3 mm.

Using the obtained pellets, according to the following method, each test piece for evaluation was produced and used for evaluation. The results are shown in Tables 1-4.

(How to make the test piece) After drying the obtained pellets at 120°C for more than 4 hours, use an injection molding machine (manufactured by FANUC Co., Ltd., ROBOSHOT S2000i100A) to produce JIS K 7139 "Plastic-Test Multi-purpose test piece type A (total length 168 mm×thickness 4 mm) specified in "Strip". The end face of the test piece was cut, and the cut end face was mirror-finished using a resin plate end face mirror machine (manufactured by Megaro Technica Co., Ltd., PLA-BEAUTY PB-500).

(Evaluation method of cumulative transmittance) Set up a long optical path measurement attachment on a spectrophotometer (manufactured by Hitachi, Ltd., UH4150), use a 50 W halogen lamp as a light source, and use a mask of 5.6 mm × 2.8 mm in front of the light source and a mask of 6.0 mm × in front of the sample In the state of 2.8 mm, measure the spectral transmittance of each 1 nm of the test piece in the wavelength range of 380-780 nm in the direction of the entire length of the test piece. Accumulate the measured spectral transmittance and round off the tens to obtain the cumulative transmittance of each. Furthermore, the cumulative transmittance of 31,000 or more was regarded as good (indicated by ⊙ in the table), that of less than 31,000 and more than 25,000 was regarded as usable (indicated by ○ in the table), and that of less than 25,000 was regarded as poor (indicated by ⊙ in the table). Indicated by ×).

(Evaluation method of yellowness) Based on the spectral transmittance measured in the cumulative transmittance evaluation method, the yellowness (hereinafter referred to as YI) of each was obtained in a 10-degree field of view using the standard light source D65. Furthermore, YI is 15 or less as good (indicated by ◎ in the table), more than 15 and 30 or less is regarded as usable (indicated by ○ in the table), and if it exceeds 30, it is regarded as poor (indicated by × in the table). express).

(Heating test evaluation of molded products) The test piece prepared above was placed in the non-oxidizing oven IPHH-201M manufactured by ESPEC, and a heating test was performed at 200°C for 72 hours. Then, the surface of each test piece was visually observed. The state after the heating test was evaluated according to the following criteria. The results are shown in Tables 1 to 4. ◎: Colorless and transparent. ○: Transparent, usable, slightly colored. X: Opaque or darkly colored.

In Tables 1 to 4, the raw materials, blending ratios, and evaluation results of each Example and Comparative Example are collectively shown.

a)：將(C1)與(B1)混合後，與其他原料混合。[Table 1]

a): (C1) and (B1) are mixed, and then mixed with other raw materials.

[Table 2]

b)：白濁。 c)：未進行試驗。[table 3]

b): cloudy. c): Not tested.

[Table 4]

The aromatic polycarbonate resin composition of Examples 1 to 33 contains an aromatic polycarbonate resin (A), a polyether derivative (B) and a specific aromatic compound (C), and contains phosphorus in a specific ratio if necessary. Department of antioxidants (D) and so on. Therefore, the test piece formed from the aromatic polycarbonate resin composition has a higher cumulative transmittance, less yellowness, and almost no deterioration after the heating test.

Moreover, the molded article obtained by molding such an aromatic polycarbonate resin composition has less yellowness, excellent hue, and almost no deterioration after a heating test.

On the other hand, the aromatic polycarbonate resin compositions of Comparative Examples 1 and 2 have low cumulative transmittance and high yellowness due to the large amount of polyether derivative (compound B1). Thus, the molded product obtained by molding the aromatic polycarbonate resin composition of Comparative Example 1 was poor in brightness and hue. Moreover, the results after the heating test were also poor.

As mentioned above, the form of implementation was demonstrated as an illustration of the technique of this invention. Therefore, a detailed description is provided.

Therefore, the constituent elements described in the detailed description may include not only constituent elements necessary for solving the problems but also constituent elements not essential for solving the problems in order to illustrate the above-mentioned technology. Therefore, these non-essential constituent elements should not be directly determined to be essential just because they are described in the detailed description.

In addition, the above-mentioned embodiments are for illustrative purposes of the technology of the present invention, and therefore various changes, substitutions, additions, omissions, etc. can be made within the scope of the claims or their equivalents. [Industrial availability]

The aromatic polycarbonate resin composition of the present invention does not impair the properties such as heat resistance and mechanical strength originally possessed by the polycarbonate resin, but has excellent thermal stability and weather resistance. When the molded article of the carbonate resin composition is heated, the appearance and optical properties are also excellent. Therefore, for example, even when it is used in the case where the surface of the light guide plate of a thin light guide light source with a thickness of about 0.3 mm is irradiated for a long time and the heating state continues, there is no change in the hue of the light guide plate obtained, which affects the appearance or optics. In the case of reduced characteristics, the industrial use value is extremely high. related application Furthermore, this application claims priority based on Article 4 of the Paris Treaty based on the application number 2018-11641 filed in Japan on January 26, 2018 and the application number 2018-156195 filed in Japan on August 23, 2018 . The contents of these basic applications are incorporated into this specification by reference.

Claims (20)

An aromatic polycarbonate resin composition comprising an aromatic polycarbonate resin (A), a polyether derivative (B) and an aromatic compound (C) represented by the following formula; 100 parts by weight of polycarbonate resin (A), including 0.1 to 2.0 parts by weight of polyether derivative (B), and 0.0001 to 0.003 parts by weight of aromatic compound (C);

Such as the aromatic polycarbonate resin composition of claim 1, wherein the above-mentioned polyether derivative (B) comprises a polyether derivative represented by the following formula (1) with a weight average molecular weight of 500 to 8000; formula (1) ): RO-(X-O)m(Y-O)n-R' (In the formula, R and R' independently represent a hydrogen atom or an alkyl group with 1 to 30 carbons, and X represents a straight chain extension with 2 to 4 carbons. Alkyl or branched chain alkyl, Y represents a straight chain or branched chain with 2 to 5 carbons, X and Y can be the same or different, m and n independently represent 3 to 60, m +n means 6~120). The aromatic polycarbonate resin composition as claimed in item 2, wherein the polyether derivative represented by the formula (1) comprises polyether derivatives represented by the following formula (2), polyether derivatives represented by the formula (3) Polyether derivatives, polyether derivatives represented by formula (4), polyether derivatives represented by formula (5), polyether derivatives represented by formula (6), polyether represented by formula (7) At least one of derivatives, polyether derivatives represented by formula (8), polyether derivatives represented by formula (9), and polyether derivatives represented by formula (10); formula (2): HO -(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH (wherein, m and n independently represent 3~60, m+n represent 8~90); formula ( 3): HO-(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH ₂ CH ₂ CH(CH ₃ )CH ₂ O)nH (where m and n independently represent 3~60, m+n represents 8~90); Formula (4): HO-(CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH (wherein, m and n independently represent 3~60, m+n represents 8~90); formula (5): RO-(CH ₂ CH ₂ CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH (in the formula, R represents an alkyl group with 1 to 30 carbons , m and n independently represent 3~60, m+n represent 8~90); formula (6): RO-(CH ₂ CH ₂ O)m(CH(CH ₃ )CH ₂ O)nH (where , R represents an alkyl group with a carbon number of 1 to 30, m and n represent 3 to 60 independently, and m+n represents 8 to 90); formula (7): HO-(CH ₂ CH ₂ CH ₂ CH ₂ O) m(CH ₂ CH ₂ O)nH (wherein, m and n independently represent 3~60, m+n represent 8~90); formula (8): HO-(CH ₂ CH ₂ CH ₂ CH ₂ O ) pH (wherein, p represents 6~100); formula (9): HO-(CH(CH ₃ )CH ₂ O)qH (wherein, q represents 7~120); and formula (10): HO- (CH(C ₂ H ₅ )CH ₂ O)rH (wherein, r represents 6~100). The aromatic polycarbonate resin composition according to any one of claims 1 to 3, wherein the CPR of the polyether derivative (B) measured in accordance with JIS K1557-4 is 2.0 or less. The aromatic polycarbonate resin composition according to any one of claims 1 to 3, wherein the pH of the polyether derivative (B) measured in accordance with JIS K1557-5 is 5.0 or more and less than 7.5. The aromatic polycarbonate resin composition according to any one of claims 1 to 3, wherein the temperature at which the polyether derivative (B) becomes 90% by weight (or weight reduction) measured by thermogravimetric measurement based on JIS K7120 The temperature at which the rate becomes 10%) is above 300°C. The aromatic polycarbonate resin composition according to any one of claims 1 to 3, wherein 0.0005 to less than 0.003 parts by weight is contained relative to 100 parts by weight of the aromatic polycarbonate resin (A) The aromatic compound (C). The aromatic polycarbonate resin composition according to any one of claims 1 to 3, wherein relative to 100 parts by weight of the aromatic polycarbonate resin (A), further containing at most 0.5 parts by weight of phosphorus-based antioxidant (D) . The aromatic polycarbonate resin composition according to claim 8, wherein the phosphorus-based antioxidant (D) comprises a phosphite compound having the following phosphite structure;

The aromatic polycarbonate resin composition according to Claim 9, wherein the above-mentioned phosphorus antioxidant (D) comprises a phosphite ester represented by the following formulas (11), (12), (13) and (14) At least one compound among the compounds;

[wherein, R ¹ represents an alkyl group with 1 to 20 carbon atoms or an aryl group that can also be substituted by an alkyl group, and a represents an integer of 0 to 3]; formula (12): [Chemical 4]

[In the formula, R ² , R ³ , R ⁵ and R ⁶ independently represent a hydrogen atom, an alkyl group with 1 to 8 carbons, a cycloalkyl group with 5 to 8 carbons, and an alkyl ring with 6 to 12 carbons. Alkyl group, aralkyl group or phenyl group with 7~12 carbons; R ⁴ represents a hydrogen atom or an alkyl group with 1~8 carbons; X represents a single bond, a sulfur atom or the formula: -CHR ⁷ -(here, R ⁷ represents a hydrogen atom, an alkyl group with 1 to 8 carbons, or a cycloalkyl group with 5 to 8 carbons); A represents an alkylene group with 1 to 8 carbons or the formula: * -COR ⁸ -(this where, R ⁸ represents a single bond or an alkylene group with 1 to 8 carbons, * represents the group represented by the bond on the oxygen side); any one of Y and Z represents a hydroxyl group, an alkane with 1 to 8 carbons Oxygen or an aralkyloxy group with 7 to 12 carbons, the other means a hydrogen atom or an alkyl group with 1 to 8 carbons];

[wherein, R ⁹ and R ¹⁰ represent an alkyl group with 1 to 20 carbon atoms, or an aryl group that may be substituted by an alkyl group, and b and c independently represent an integer of 0 to 3];

[In the formula, R ¹¹ ~R ¹⁸ independently represent an alkyl or alkenyl group with 1~3 carbons; R ¹¹ and R ¹² , R ¹³ and R ¹⁴ , R ¹⁵ and R ¹⁶ , R ¹⁷ and R ¹⁸ can also be are bonded to each other to form a ring; R ¹⁹ ~ R ²² independently represent a hydrogen atom or an alkyl group with 1 to 20 carbons; d ~ g are independently an integer of 0 to 5; X ¹ ~ X ⁴ independently represent A single bond or a carbon atom; when X ¹ to X ⁴ are single bonds, among R ¹¹ to R ²² , the functional group connected to the single bond is excluded from the formula (14)]. The aromatic polycarbonate resin composition according to claim 10, which satisfies at least one selected from the following: the phosphite compound represented by the above formula (11) contains tris(2,4-di-di-phosphite) Tributylphenyl) ester; the phosphite compound represented by the above formula (12) contains 2,4,8,10-tetra-tertiary butyl-6-[3-(3-methyl-4-hydroxy -5-tert-butylphenyl)propoxy]dibenzo[d,f][1,3,2]dioxaphosphapane; the phosphite compound represented by the above formula (13) Contains 3,9-bis(2,6-di-tert-butyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5, 5] Undecane; and the phosphite compound represented by the above formula (14) includes bis(2,4-dicumylphenyl)pentaerythritol diphosphite. The aromatic polycarbonate resin composition according to any one of claims 1 to 3, wherein relative to 100 parts by weight of the above-mentioned aromatic polycarbonate resin (A), 0.001 to 0.2 parts by mass of epoxy compound (E ). The aromatic polycarbonate resin composition as claimed in item 12, wherein the above-mentioned epoxy compound (E) Contains 3',4'-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate. The aromatic polycarbonate resin composition according to any one of Claims 1 to 3, which further contains a heat stabilizer, an antioxidant, a colorant, a release agent, a softener, an antistatic agent, and an impact modifier At least one of the group of agents. An optical molded article comprising the aromatic polycarbonate resin composition according to any one of claims 1 to 14. The optical molded article according to claim 15, wherein the optical molded article includes a molded article selected from a light guide plate, a surface light emitting body material, a light guide film, a vehicle light guide, and a nameplate. A method of manufacturing an optical molded article, comprising molding the aromatic polycarbonate resin composition according to any one of claims 1 to 14. A particle of the aromatic polycarbonate resin composition according to any one of claims 1 to 14. The pellet according to claim 18, which is used to obtain optical moldings. A method for producing a molded article for optics, comprising shaping the particles according to claim 19.