JP6553314B1 - Aromatic polycarbonate resin composition and molded article for optics - Google Patents

Abstract

Disclosed is a polycarbonate resin that does not lose its inherent heat resistance, mechanical strength, and other properties, has excellent thermal stability, high light transmittance, and has high light transmittance even when the resulting molded product is heated. An excellent aromatic polycarbonate resin composition is provided. SOLUTION: A polycarbonate-based resin composition containing an aromatic polycarbonate resin (A), a polyether derivative (B) and a specific aromatic compound (C), which is added to 100 parts by weight of the aromatic polycarbonate resin (A). On the other hand, 0.1 to 2.0 parts by weight of the polyether derivative (B) and 0.0001 or more and less than 0.05 parts by weight of the aromatic compound (C) are contained, and the epoxy compound (E). Is contained in an amount of 0.001 to 0.2 parts by mass. [Selection figure] None

Description

  The present invention relates to an aromatic polycarbonate resin composition and a molded article for optics.

  Polycarbonate resins are excellent in impact resistance, heat resistance, transparency, and the like, and are conventionally used for molded products such as light guide plates, various lenses, and nameplates.

  For example, Patent Document 1 discloses an aromatic polycarbonate resin composition for a light guide plate in which a stabilizer and a release agent are blended with an aromatic polycarbonate resin having a specific molecular weight and a specific molecular weight distribution.

  Patent Document 2 discloses a polycarbonate resin composition for optical molded articles in which a fluorescent whitening agent is blended with a resin component in which a specific amount of a bead-shaped crosslinked acrylic resin having a specific diameter is blended with a polycarbonate resin.

  In addition, for example, as disclosed in Patent Documents 3 to 6, various proposals have been made on resin compositions using polycarbonate resin and other materials in combination to obtain excellent light transmittance and improve the brightness of optical members. It is done.

JP 2007-204737 A Japanese Patent Application Laid-Open No. 09-020860 JP, 2011-133647, A JP-A-11-158364 JP 2001-215336 A JP 2004-051700 A

However, the polycarbonate resin composition disclosed in Patent Documents 3 to 6 is a recent requirement as a light guide plate material (particularly a requirement that there is no decrease in light transmittance even when molding is performed at a high temperature for thin-wall molding). ) Is not fully satisfactory.
Furthermore, in the case where a thin molded product (for example, a light guide plate) of about 0.3 mm which has been molded and processed in recent years is exposed for a very long time under high temperature conditions such as light irradiation, the decrease in transparency is small ( Whitening or coloring small) materials are being sought.

  The present invention does not impair the properties such as heat resistance and mechanical strength inherent to the polycarbonate resin, is excellent in thermal stability, has high light transmittance, and is molded as thin as about 0.3 mm. To provide an aromatic polycarbonate resin composition that is less likely to cause a decrease in transparency (i.e., less susceptible to white turbidity and coloring) even when a product (for example, a light guide plate) is exposed to a high temperature due to light irradiation or the like for an extremely long period of time. With the goal.

  As a result of intensive studies in order to solve such problems, the present inventors have found that an aromatic polycarbonate resin (A), a polyether derivative (B), and a specific aromatic compound (C) are contained in a predetermined amount. The polycarbonate resin composition is excellent in thermal stability, high light transmittance, and thin molding of about 0.3 mm that is molded without impairing the heat resistance, mechanical strength, etc. inherent to the polycarbonate resin. Even when the product (light guide plate) was exposed for a long time under high temperature conditions such as light source irradiation, it was found that there was little decrease in transparency (it is difficult to cause white turbidity or coloring), and the present invention was completed.

That is, the present invention is 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, which is an aromatic polycarbonate resin (A) 0.1 to 2.0 parts by weight of the polyether derivative (B) per 100 parts by weight of the polyether derivative (B) and 0.0001 to 0.05 parts by weight of the aromatic compound (C) Provided are an aromatic polycarbonate resin composition containing less than 20% by weight and an optical molded article formed by molding the same.
formula:

  The polycarbonate resin composition of the present invention does not lose the properties such as heat resistance and mechanical strength originally possessed by the polycarbonate resin, is excellent in heat stability, has a high light transmittance, and has a molded product obtained. Even when exposed for a long period of time under high temperature conditions such as environment and / or light source irradiation, the transparency is unlikely to be reduced (i.e., hardly cloudy or colored). Therefore, even if it is a thin molded product (light guide plate) having a thickness of about 0.3 mm, for example, it is difficult for the hue to change and the appearance to be deteriorated (deteriorated), and the high temperature conditions resulting from the external environment and the light source Even when exposed to a long period of time, it is difficult to cause a decrease in transparency (it is difficult to cause clouding or coloring), and the industrial value is extremely high.

  The embodiment will be described in detail below. However, more detailed description than necessary may be omitted. For example, detailed description of already well-known matters and redundant description of substantially the same configuration may be omitted. This is to avoid unnecessary redundancy in the following description 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 aromatic polycarbonate resin composition of the embodiment of the present invention includes an aromatic polycarbonate resin (A), a polyether derivative (B), and a specific aromatic compound (C), and if necessary, a phosphorus-based antioxidant. (D), an epoxy compound (E), and / or other components can be included.

  In the embodiment of the present invention, the “aromatic polycarbonate resin (A)” is a polycarbonate resin based on an aromatic compound, and is particularly limited as long as the target aromatic polycarbonate resin composition can be obtained. There is nothing to do. As such an aromatic polycarbonate resin, for example, polymers obtained by the phosgene method in which various dihydroxy diaryl compounds and phosgene are reacted, or the transesterification method in which dihydroxy diaryl compounds and carbonic esters such as diphenyl carbonate are reacted are exemplified. it can. A representative example includes a polycarbonate resin made 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 Bis (hydroxyaryl) alkanes such as (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, Dihydroxydiaryl ethers such as 3'-dimethyl diphenyl ether; dihydroxy diaryl sulfides such as 4,4'-dihydroxy diphenyl sulfide; 4,4'-dihydroxy diphenyl sulfoxide, 4,4'-dihydroxy-3,3'-dimethyl diphenyl Dihydroxydiarylsulfoxides such as sulfoxide; dihydroxydiarylsulfones such as 4,4'-dihydroxydiphenylsulfone and 4,4'-dihydroxy-3,3'-dimethyldiphenylsulfone Kill. These can be used alone or in combination. Besides these, piperazine, dipiperidyl hydroquinone, resorcin, 4,4'-dihydroxydiphenyl, and the like can be used in combination.

  Furthermore, you may use it combining the said dihydroxy diaryl compound and the aromatic compound more than trivalent shown, for example below.

  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 can be exemplified.

  The viscosity average molecular weight of the aromatic polycarbonate resin (A) is preferably 10,000 to 100,000, and more preferably 12,000 to 30,000. In addition, when manufacturing such an aromatic polycarbonate resin (A), a molecular weight modifier, a catalyst, etc. can 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 aromatic polycarbonate resin composition intended by the present invention can be obtained. Absent. Such polyether derivatives include, as a representative example, polyether derivatives represented by the following formula (1).

Formula (1):
RO- (X-O) m (YO) n-R '
(Wherein, R and R ′ each independently represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, X represents a linear alkylene group having 2 to 4 carbon atoms or a branched alkylene group, and Y represents A linear alkylene group having 2 to 5 carbon atoms or a branched alkylene group; X and Y may be the same or different; m and n each independently represent 3 to 60; 6 to 120 are shown.)
It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (1), it is more preferable that it is 1000-4000.
A commercial item can be used for the polyether derivative represented by Formula (1).

The polyether derivative represented by the formula (1) is
Following formula (1-1):
RO- (X-O) m (YO) n-R '
(Wherein, R and R ′ each independently represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, X represents a linear alkylene group having 2 to 4 carbon atoms, and Y represents 2 to 2 carbon atoms And m and n each independently represent 3 to 60, and m + n represents 8 to 90.)
It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (1-1), it is more preferable that it is 1000-4000.
A commercial item can be used for the polyether derivative represented by Formula (1-1).

The polyether derivative represented by the formula (1) is
Following formula (1-2):
RO- (X-O) m (YO) n-R '
(Wherein, R and R ′ each independently represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, X represents a linear alkylene group having 2 to 4 carbon atoms, and Y represents 2 to 2 carbon atoms 5 represents a linear alkylene group, and X and Y may be the same or different, and m and n each independently represent 3 to 60, and m + n represents 6 to 100.)
The weight average molecular weight of the polyether derivative represented by the formula (1-2) is preferably 500 to 8000, and more preferably 1000 to 4000.
A commercial item can be used for the polyether derivative represented by Formula (1-2).

The polyether derivative represented by the formula (1) is
The following formula (1-3):
RO- (X-O) m (YO) n-R '
(Wherein R and R ′ each independently represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, X is a branched alkylene group having 2 to 4 carbon atoms, and Y is 2 to 5 carbon atoms And X and Y may be the same or different, m and n each independently represent 3 to 60, and m + n represents 6 to 120.)
The weight average molecular weight of the polyether derivative represented by the formula (1-3) is preferably 500 to 8000, and more preferably 1000 to 4000.
A commercial item can be used for the polyether derivative represented by Formula (1-3).

  The polyether derivative represented by the formula (1) includes 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), A polyether derivative represented by formula (5), a polyether derivative represented by formula (6), a polyether derivative represented by formula (7), a polyether derivative represented by formula (8), a formula ( It is preferable that at least 1 sort (s) selected from the group containing the polyether derivative represented by 9) and the polyether derivative represented by Formula (10) is included.

  The polyether derivative represented by the formula (1-1) includes a polyether derivative represented by the following formula (2), a polyether derivative represented by the formula (3), and a polyether represented by the formula (4). It is preferable to include at least one selected from the group comprising a derivative, a polyether derivative represented by the formula (5), and a polyether derivative represented by the formula (6).

  The polyether derivative represented by the formula (1-2) includes at least one selected from the group comprising the polyether derivative represented by the formula (7) and the polyether derivative represented by the formula (8). Is preferred.

  The polyether derivative represented by the formula (1-3) includes at least one selected from the group comprising the polyether derivative represented by the formula (9) and the polyether derivative represented by the formula (10). Is preferred.

Formula (2):
_{HO- (CH 2 CH 2 CH 2} CH 2 O) m (CH (CH 3) CH 2 O) n-H
(In the formula, m and n each independently represent 3 to 60, and m + n represents 8 to 90.)

As a polyether derivative represented by Formula (2), the modified glycol which consists of a tetramethylene glycol unit and a propylene glycol unit is suitable. A commercial item can be used as such a polyether derivative, For example, NOF Corporation Co., Ltd. product polyserine DCB-1000 (weight average molecular weight 1000), polyserine DCB-2000 (weight average molecular weight 2000), polyserine DCB -4000 (weight average molecular weight 4000) can be used.
It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (2), it is more preferable that it is 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) n-H
(In the formula, m and n each independently represent 3 to 60, and m + n represents 8 to 90.)

As the polyether derivative represented by the formula (3), a modified glycol composed of a tetramethylene glycol unit and a 2-methyltetramethylene glycol unit is preferable. As such a polyether derivative, a commercial item can be used, for example, PTG-L1000 (weight average molecular weight 1000), PTG-L2000 (weight average molecular weight 2000) manufactured by Hodogaya Chemical Industry Co., Ltd., or PTG -L3000 (weight average molecular weight 3000) etc. can be utilized.
It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (3), it is more preferable that it is 1000-4000.

Formula (4):
_{HO- (CH 2 CH 2 O)} m (CH (CH 3) CH 2 O) n-H
(In the formula, m and n each independently represent 3 to 60, and m + n represents 8 to 90.)

As the polyether derivative represented by the formula (4), a modified glycol composed of an ethylene glycol unit and a propylene glycol unit is preferable. A commercial item can be used as such a polyether derivative, For example, NOF Co., Ltd. product Unilobe 50DE-25 (weight average molecular weight 1750), Unilobe 75DE-25 (weight average molecular weight 1400) etc. are used. it can.
It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (4), it is more preferable that it is 1000-4000.

Formula (5):
_{RO- (CH 2 CH 2 CH 2} CH 2 O) m (CH (CH 3) CH 2 O) n-H
(In the formula, R represents an alkyl group having 1 to 30 carbon atoms, m and n each independently represent 3 to 60, and m + n represents 8 to 90.)

As a polyether derivative represented by Formula (5), it consists of a tetramethylene glycol unit and a propylene glycol unit, and the modified | denatured glycol of one end butyl group or one end stearyl group is suitable. A commercial item can be used as such a polyether derivative, For example, NOF Corporation Co., Ltd. product polyserine BC-1000 (one end butyl group, the weight average molecular weight 1000), polyserine SC-1000 (one end stearyl) Group, weight average molecular weight 1000) and the like.
The weight average molecular weight of the polyether derivative represented by the formula (5) is preferably 500 to 8000, more preferably 1000 to 4000.

Formula (6):
_{RO- (CH 2 CH 2 O)} m (CH (CH 3) CH 2 O) n-H
(In the formula, R represents an alkyl group having 1 to 30 carbon atoms, m and n each independently represent 3 to 60, and m + n represents 8 to 90.)

As the polyether derivative represented by the formula (6), a modified glycol having an ethylene glycol unit and a propylene glycol unit and having one terminal butyl group or one terminal stearyl group is preferable. A commercial item can be used as such a polyether derivative, For example, NOF Co., Ltd. product Unilobe 50 MB-11 (one end butyl group, the weight average molecular weight 1000), Unilobe 50 MB-26 (one end butyl) Group, weight average molecular weight 2000), Unilube 50MB-72 (one-end butyl group, weight-average molecular weight 3000), Unilube 10MS-250KB (one-end stearyl group, weight-average molecular weight 2000), and the like can be used.
It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (6), it is more preferable that it is 1000-4000.

Formula (7):
_{HO- (CH 2 CH 2 CH 2} CH 2 O) m (CH 2 CH 2 O) n-H
(In the formula, m and n each independently represent 3 to 60, and m + n represents 8 to 90.)

As the polyether derivative represented by the formula (7), a modified glycol composed of a tetramethylene glycol unit and an ethylene glycol unit is preferable. A commercial item can be used as such a polyether derivative, For example, NOF Corporation Co., Ltd. product polyserine DC3000E (weight average molecular weight 3000), polyserine DC1800E (weight average molecular weight 1800) etc. can be used.
It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative represented by Formula (7), it is more preferable that it is 1000-4000.

Formula (8):
_{HO- (CH 2 CH 2 CH 2} CH 2 O) p-H
(In the formula, p represents 6 to 100.)

As a polyether derivative represented by Formula (8), polytetramethylene glycol is preferable. A commercial item can be used as such a polyether derivative, For example, PTG-650SN (The weight average molecular weight 650) by Hodogaya Chemical Industry Co., Ltd., PTG-850SN (the weight average molecular weight 850), PTG- 1000 SN (weight average molecular weight 1000), PTG-1400 SN (weight average molecular weight 1400), PTG-2000 SN (weight average molecular weight 2000), or PTG-2900 (weight average molecular weight 2900) can be used.
It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative (polytetramethylene glycol) represented by Formula (8), it is more preferable that it is 1000-4000.

Formula (9):
_{Formula: HO- (CH (CH 3)} CH 2 O) q-H
(In the formula, q represents 7 to 120.)

As a polyether derivative represented by Formula (9), a polypropylene glycol is preferable. As such a polyether derivative, a commercially available product can be used. For example, Polyglycol P2000P (weight average molecular weight 2000) manufactured by Dow Chemical, manufactured by NOF Corporation, Uniol D-1000 (weight average molecular weight 1000), Uniol D-2000 (weight average molecular weight 2000), Uniol D-4000 (weight average molecular weight 4000), etc. can be used.
It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative (polypropylene glycol) represented by Formula (9), it is more preferable that it is 1000-4000.

Formula (10):
_{HO- (CH (C 2 H 5} ) CH 2 O) r-H
(In the formula, r represents 6 to 100.)

As a polyether derivative represented by Formula (10), polybutylene glycol is preferable. A commercial item can be used as such a polyether derivative, For example, NOF Corporation make, Uniol PB-500 (weight average molecular weight 500), Uniol PB-1000 (weight average molecular weight 1000), Uniol PB -2000 (weight average molecular weight 2000) or the like can be used.
It is preferable that it is 500-8000, and, as for the weight average molecular weight of the polyether derivative (polybutylene glycol) represented by Formula (10), it is more preferable that it is 1000-4000.

  The polyether derivative represented by the general formula (1) generally has high heat resistance, and a molded product obtained by molding an aromatic polycarbonate resin composition containing the polyether derivative at a high temperature has high luminance and light transmittance.

  In addition, since the polyether derivative (B) used in the present invention has an appropriate lipophilicity, it is excellent in compatibility with the aromatic polycarbonate resin (A). Transparency can be maintained without deteriorating the transparency of a molded product obtained from the blended aromatic polycarbonate resin composition. 500-8000 are preferable and, as for the weight average molecular weight of such a polyether derivative (B), 1000-4000 are more preferable.

  The quantity of a polyether derivative is 0.1-2.0 weight part with respect to 100 weight part of aromatic polycarbonate resin (A), and 0.3-1.8 weight part is preferable. When the amount of the polyether derivative is less than 0.1 parts by weight, the effect of improving the light transmittance and the hue may be insufficient. Conversely, when the amount of the polyether derivative exceeds 2.0 parts by weight, the clouding rate may increase and the light transmittance may decrease.

  The aromatic polycarbonate resin composition of the embodiment of the present invention contains an aromatic compound (C) of the following formula as an essential component together with the polyether derivative (B). As described above, by using the polyether derivative (B) and the aromatic compound (C) in combination, it is composed of the aromatic polycarbonate resin composition obtained while maintaining the excellent optical properties required for the optical molded article. It is possible to prevent deterioration such as deterioration due to the usage condition of the molded article or aging deterioration.

  For example, thermal deterioration (white turbidity or coloring) due to light irradiation of an optical molded article formed from an aromatic polycarbonate resin composition with a light source (such as an LED light source) for a long period of time is effectively prevented. An optical molded article may have an increase in temperature on the surface of the molded article under severe conditions such as heat and / or when exposed to light for a long time, and the aromatic polycarbonate contained in the aromatic polycarbonate resin composition Thermal degradation of the resin (A) may proceed little by little. Furthermore, the polyether derivative (B) in the resin composition can be modified, and the transparency (brightness or light transmittance) expected for an aromatic polycarbonate resin composition used in ordinary optical molded articles is impaired, and molding is performed. White turbidity or coloring (light to dark coloring) may occur on the surface of the product.

As a result of intensive investigations in view of this problem, the inventors of the present invention have found that the specific aromatic compound (C) of the following formula is particularly effective as a compound that suppresses the deterioration of the polyether derivative (B). By adding the specific aromatic compound (C) to the polyether derivative (B) in advance or before melt-kneading to obtain the aromatic polycarbonate resin composition, the polyether derivative (B The present invention has been completed with the idea that the phenomenon of white turbidity or coloring (light to deep coloring) can be reduced or alleviated by suppressing deterioration of
formula:

  The amount of the aromatic compound (C) used in the embodiment of the present invention is 0.0001 or more and less than 0.05 part by weight with respect to 100 parts by weight of the aromatic polycarbonate resin (A). More than part 0.003 weight part is preferred. When the amount of the aromatic compound (C) is less than 0.0001 parts by weight, the effect of suppressing white turbidity or coloring is insufficient. Conversely, when the amount of the aromatic compound (C) is 0.05 parts by weight or more, it is not desirable because the high level of light transmittance and hue required for the optical molded article may not be achieved.

  The aromatic polycarbonate resin composition of the embodiment of the present invention can further contain a phosphorus-based antioxidant (D). Thus, when the aromatic polycarbonate resin composition simultaneously contains the polyether derivative (B), the specific aromatic compound (C) and the phosphorus-based antioxidant (D), the excellent optical properties required for an optical molded article In particular, it is possible to prevent deterioration such as deterioration due to usage conditions and aging deterioration without deteriorating the initial optical characteristics of the molded article made of the obtained aromatic polycarbonate resin composition while maintaining and improving the characteristics. .

The phosphorus-based antioxidant is not particularly limited as long as the aromatic polycarbonate resin composition targeted by the present invention can be obtained, but it is preferable to include a phosphite compound having the following phosphite structure. .

  In the aromatic polycarbonate resin composition according to the embodiment of the present invention, the phosphorus antioxidant (D) is a phosphite compound represented by the following formula (11) and a phosphite compound represented by the following formula (12). It is preferable to include at least one compound selected from a phosphoric acid ester compound, a phosphorous acid ester compound represented by the following formula (13), and a phosphorous acid ester compound represented by the following formula (14).

  It is preferable that a phosphorus antioxidant (D) contains the compound represented, for example by following formula (11).

（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） Formula (11):

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

In the 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.

  Examples of the compound represented by the formula (11) include triphenyl phosphite, tricresyl phosphite, tris (2,4-di-t-butylphenyl) phosphite, trisnonylphenyl phosphite and the like. . 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.

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

（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。） Formula (12):

(Wherein, R ² , R ³ , R ⁵ and R ⁶ each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, or 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- (here, 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) A represents an alkyl group having 1 to 8 carbon atoms. alkylene group or the formula: * - COR 8 - ^(wherein, R ⁸ represents a single bond or an alkylene group having 1 to 8 carbon atoms, * indicates a bond to the oxygen side) are represented by Y and Z are either a hydroxyl group or an alcohol having 1 to 8 carbon atoms. And the other represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.

In formula (12), R ² , R ³ , R ⁵ and R ⁶ each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, or 6 to 6 carbon atoms. 12 alkylcycloalkyl group, a C7-C12 aralkyl group, or a phenyl group.

  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.

Each of R ² , R ³ and R ⁵ is preferably independently an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms or an alkyl cycloalkyl 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 methyl, ethyl, n-propyl, i-propyl, n-butyl, i-butyl, sec-butyl, t-butyl, t-pentyl and the like It is preferably an alkyl group of 1 to 5, and 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, and 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 Formula (12), 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 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 the formula (12), X represents a single bond, a sulfur atom or the formula: -CHR ⁷ - represents a group represented by. 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 of 1 to 8 carbon atoms and the cycloalkyl group of 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. Be 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 formula (12), 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. Further, the formula: * - COR ⁸ - ^{R 8} in the 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 formula (12), one of Y and Z is 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 8 carbon atoms Represents an alkyl group of 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 said R < ² >, R < ³ >, R < ⁵ > and R < ⁶ > is mentioned, for example.

  Examples of the compound represented by the formula (12) include 2,4,8,10-tetra-tert-butyl-6- [3- (3-methyl-4-hydroxy-5-tert-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-2,1 - 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) is used when the obtained aromatic polycarbonate resin composition is used particularly in fields where optical properties are required. -4-Hydroxy-5-t-butylphenyl) propoxy] dibenzo [d, f] [1,3,2] dioxaphosphine is suitable, and for example, Sumitizer GP (" “Smilizer” is commercially available as a registered trademark.

  The phosphorus-based antioxidant (D) preferably includes, for example, a compound represented by the following formula (13).

（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。） Formula (13):

(Wherein, R ⁹ and R ¹⁰ each independently represent an alkyl group having 1 to 20 carbon atoms or an aryl group which may be substituted with an alkyl group, and b and c each independently represent 0 Indicates an integer of ~ 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 from ADEKA under the trade name “ADK STAB PEP-24G”. ADK STAB PEP-36 ("ADEKA STAB" is a registered trademark) manufactured by ADEKA Corporation is commercially available.

  The phosphorus-based antioxidant (D) preferably contains, for example, a compound represented by the following formula (14).

Formula (14):

(Wherein, R ^{11 to} R ¹⁸ each independently represent an alkyl group having 1 to 3 carbon atoms or an alkenyl group. R ¹¹ and R ¹² , R ¹³ and R ¹⁴ , R ¹⁵ and R ¹⁶ , and R ¹⁷ R ¹⁸ may be bonded to each other to form a ring R ^{19 to} R ²² each independently represent a hydrogen atom or an alkyl group having 1 to 20 carbon atoms d to g are each independently And X ^{1 to} X ⁴ each independently represent a single bond or a carbon atom, in the case where X ^{1 to} X ⁴ are single bonds, among R ^{11 to} R ²² , The functional group linked to the single bond is excluded from the general formula (14))

  Specific examples of the compound represented by the formula (14) include bis (2,4-dicumylphenyl) pentaerythritol diphosphite. This is manufactured by Dover Chemical, trade name "Doverphos (registered trademark) S-9228", manufactured by ADEKA, trade name "Adecastab PEP-45" (bis (2,4-dicumylphenyl) pentaerythritol diphosphite) It is commercially available as

The above-mentioned aromatic polycarbonate resin composition satisfying at least one selected from the following is preferred:
The phosphite compound represented by the formula (11) contains tris (2,4-di-t-butylphenyl) phosphite;
The phosphite compound represented by the above formula (12) is 2,4,8,10-tetra-t-butyl-6- [3- (3-methyl-4-hydroxy-5-t-butylphenyl ) Propoxy] dibenzo [d, f] [1,3,2] dioxaphosphine;
The phosphite compound represented by the above formula (13) is 3,9-bis (2,6-di-tert-butyl-4-methylphenoxy) -2,4,8,10-tetraoxa-3, Containing 9-diphosphaspiro [5,5] undecane; and the phosphite compound represented by the formula (14) containing bis (2,4-dicumylphenyl) pentaerythritol diphosphite.

  The amount of the phosphorus-based antioxidant (D) is preferably up to 0.5 parts by weight and more preferably 0.02 to 0.2 parts by weight with respect to 100 parts by weight of the aromatic polycarbonate resin (A).

  In addition to the above components, the aromatic polycarbonate resin composition according to the embodiment includes, for example, an ultraviolet absorber that is a component that further improves the weather resistance of the obtained aromatic polycarbonate resin composition. It can be suitably used according to the use of the molded article obtained by shape | molding a composition.

  As an ultraviolet absorber, for example, ultraviolet absorbers usually compounded to polycarbonate resins, such as benzotriazole compounds, triazine compounds, benzophenone compounds, oxalic acid anilide compounds, alone or in combination of two or more It can be used.

  As a benzotriazole compound, for example, as a benzotriazole compound, 2- (2-hydroxy-5-t-octylphenyl) benzotriazole, 2- (3-tert-butyl-2-hydroxy-5-methylphenyl) -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-based compounds include 2,4-dihydroxybenzobenzone and 2-hydroxy-4-n-octoxybenzone.

  The quantity of a ultraviolet absorber is 0-1.0 weight part with respect to 100 weight part of aromatic polycarbonate resin (A), and it is preferable that it is 0-0.5 weight part. If the amount of the ultraviolet absorber exceeds 1.0 parts by weight, the initial hue of the resulting aromatic polycarbonate resin composition may be reduced. When the amount of the ultraviolet absorber is 0.1 parts by weight or more, the effect of further improving the weather resistance of the aromatic polycarbonate resin composition is particularly exhibited.

  The aromatic polycarbonate resin composition of the embodiment of the present invention can contain an epoxy compound (E). Thus, when the aromatic polycarbonate resin composition simultaneously contains the polyether derivative (B), the specific aromatic compound (C) and the epoxy compound (E), the excellent optical properties required for the optical molded article are maintained It is possible to prevent the deterioration such as the deterioration due to the use condition and the aging deterioration without deteriorating the initial optical properties of the molded article made of the obtained aromatic polycarbonate resin composition while improving it.

  The epoxy compound (E) is not particularly limited as long as the epoxy compound (E) has at least one epoxy group in the molecule and an aromatic polycarbonate resin composition intended by the present invention can be obtained. The epoxy compound (E) is, for example, 3 ′, 4′-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate, epoxidized soybean oil, ε-caprolactone modified 3 ′, 4′-epoxycyclohexylmethyl 3,4- An epoxy cyclohexanecarboxylate, an epoxy group-containing acrylic / styrene polymer, 2,2-bis (4-hydroxycyclohexyl) propane-diglycidyl ether, and the like can be included. The epoxy compound (E) preferably contains 3 ', 4'-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate.

The aromatic polycarbonate resin composition of 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). It is more preferable to contain 0.002-0.1 mass part, and it is especially preferable to contain 0.005-0.05 mass part.
When the aromatic polycarbonate resin composition of the embodiment of the present invention 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), an optical molded product Improve the initial optical properties (integrated transmittance and yellowness) of the molded article made of the resulting aromatic polycarbonate resin composition while maintaining and improving the excellent optical properties required for the It is possible to prevent such deterioration.

  Furthermore, the aromatic polycarbonate resin composition according to the embodiment includes, for example, a heat stabilizer, other antioxidants, a colorant, a release agent, a softener, and an antistatic agent, as long as the effects in the present invention are not impaired. Various additives such as an agent and impact modifier, and polymers other than the aromatic polycarbonate resin (A) may be appropriately blended.

  The aromatic polycarbonate resin composition of the embodiment of the present invention is a mixture of the aromatic polycarbonate resin (A), the polyether derivative (B) and the specific aromatic compound (C), and if necessary, a phosphorus-based antioxidant. (D), the epoxy compound (E), the said various additives, the manufacturing method which mixes polymers other than aromatic polycarbonate resin (A), etc. can be illustrated. The production method is not particularly limited as long as the aromatic polycarbonate resin composition targeted by the present invention can be obtained, and the type and amount of each component can be appropriately adjusted. The method of mixing the components is also not particularly limited, and examples thereof include a method of mixing with a known mixer such as a tumbler and a ribbon blender, and a method of melt-kneading with 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 may be previously added to or mixed with the polyether derivative (B).

  The shape and size of the pellets of the aromatic 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, as a shape of a pellet, an elliptic cylindrical shape, a cylindrical shape, etc. are mentioned. The size of the pellet is preferably about 2 to 8 mm in length, and in the case of an elliptical column, it is preferable that the major axis of the cross-sectional ellipse is about 2 to 8 mm and the minor axis is 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. In addition, each obtained pellet may have such a size, or all the pellets forming the pellet assembly may have such a size, and the average value of the pellet assembly is this It may be of such a size, and there is no particular limitation.

  The molded article for optics of the embodiment of the present invention can be obtained by molding the above aromatic polycarbonate resin composition.

  The production method of the optical molded product is not particularly limited as long as the objective optical molded product of the present invention can be obtained. For example, the aromatic polycarbonate resin composition by a known injection molding method, compression molding method or the like. The method of shape | molding is mentioned.

  The optical molded product according to the present invention is suitable as, for example, a light guide plate, a surface light emitter material, a light guide film, a vehicle light guide, a name plate, and the like.

  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 be applied to an embodiment in which changes, replacements, additions, omissions, and the like are appropriately made.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. In the following description, "parts" and "%" are based on weight unless otherwise specified.

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: 15,000, SD polycarbonate 200-80 (trade name) manufactured by Sumika Polycarbonate Co., Ltd., "SD polycarbonate" is a registered trademark of Sumika Polycarbonate Co., Ltd. , Hereinafter also referred to as “PC” or (A1)

2. Polyether derivative (B):
2-1. Modified glycol composed of tetramethylene glycol unit and propylene glycol unit (random copolymerization)
Weight average molecular weight: 2000, pH: 6.7 (JIS K1557-5), Polythene DCB-2000 (trade name) manufactured by NOF Corporation, also referred to as (B1) below

2-2. Modified glycol composed of tetramethylene glycol unit and propylene glycol unit (random copolymerization)
Weight average molecular weight: 1000, pH: 6.8 (JIS K1557-5), Polythene DCB-1000 (trade name) manufactured by NOF Corporation, also referred to below (B2)

2-3. Modified glycol consisting of tetramethylene glycol unit and ethylene glycol unit (random copolymerization)
Weight average molecular weight: 3000, Polythene DC-3000E (trade name) manufactured by NOF Corporation, also referred to below (B3)

2-4. Modified glycol of one terminal butyl group (random copolymerization) consisting of tetramethylene glycol unit and propylene glycol unit
Weight average molecular weight: 1000, polyserine BC-1000 (trade name) manufactured by NOF Corporation, hereinafter also referred to as (B4)

2-5. Modified glycol consisting of ethylene glycol unit and propylene glycol unit (random copolymerization)
Weight average molecular weight: 1750, NOF Corporation Unilube 50DE-25 (trade name), hereinafter referred to as (B5)

2-6. Modified ethylene glycol unit and propylene glycol unit, modified butyl group at one terminal butyl group (random copolymerization)
Weight average molecular weight: 2000, NOF Corporation Unilube 50MB-26 (trade name), hereinafter also referred to as (B6)

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

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

2-9. Modified glycol (random copolymer) consisting of tetramethylene glycol unit and 2-methyltetramethylene glycol unit
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-t-butyl-4-hydroxytoluene [Wako Pure Chemical Industries, Ltd. product, hereinafter referred to as (C1)]

［ＢＡＳＦ社製のイルガフォス１６８（商品名）、以下（Ｄ１）ともいう］ 4. Phosphorus antioxidant (D):
4-1. Tris (2,4-di-t-butylphenyl) phosphite represented by the following formula

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

［住友化学（株）製のスミライザーＧＰ（商品名）、以下（Ｄ２）ともいう］ 4-2. 2,4,8,10-tetra-t-butyl-6- [3- (3-methyl-4-hydroxy-5-t-butylphenyl) propoxy] dibenzo [d, f represented by the following formula ] [1, 3, 2] Dioxaphosphepine

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

［Ｄｏｖｅｒ Ｃｈｅｍｉｃａｌ社製のＤｏｖｅｒｐｈｏｓ Ｓ−９２２８（商品名）、以下（Ｄ３）ともいう］ 4-3. Bis (2,4-dicumylphenyl) pentaerythritol diphosphite (IUPAC name: 3,9-bis [2,4-bis (α, α-dimethylbenzyl) phenoxy] -2 represented by the following formula: , 4,8,10-Tetraoxa-3,9-diphosphaspiro [5.5] undecane)

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

［ＡＤＥＫＡ製のアデカスタブＰＥＰ−３６（商品名）、以下（Ｄ４）ともいう］ 4-4. Bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite (IUPAC name: 3,9-bis (2,6-di-tert-butyl-) represented by the following formula: 4-methylphenoxy) -2,4,8,10-tetraoxa-3,9-diphosphaspiro [5,5] undecane)

[Adekastab PEP-36 (trade name) made by Adeka, hereinafter referred to as (D4)]

5. Epoxy compound (E)
3 ′, 4′-epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylate [Celoxide 2021P (trade name) manufactured by Daicel Chemical Industries, Ltd., hereinafter also referred to as (E1)]

(Example (or Reference Example) 1-33 and Comparative Examples 1 and 2)
The above raw materials are collectively introduced into the tumbler at a ratio shown in Tables 1 to 4 and dry mixed for 10 minutes, and then melted using a twin-screw extruder (TEX30α, manufactured by Japan Steel Works, Ltd.) The mixture was melt-kneaded at a temperature of 220 ° C. to obtain pellets of each of the aromatic polycarbonate resin compositions of Examples (or Reference Examples) 1 to 33 and Comparative Examples 1 and 2.
However, for Reference Example 7 , the compound (C) and the compound (B) were mixed in advance and then mixed with other raw materials to obtain pellets of the aromatic polycarbonate resin composition of Reference Example 7 .
The pellets obtained in the examples (or reference examples) and the comparative examples are almost elliptical cylinders, and the aggregates of 100 pellets each have an average length of about 5.1 mm to about 5 mm. The average value of the major axis of the .4 mm cross-sectional ellipse was about 4.1 mm to about 4.3 mm, and the average value of the minor axis was about 2.2 mm to about 2.3 mm.

  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 1-4.

(Method of preparing test piece)
The obtained pellets are dried at 120 ° C. for 4 hours or more, and JIS K 7139 “Plastic— at a molding temperature of 360 ° C. and a mold temperature of 80 ° C. using an injection molding machine (ROBOS HOT S2000i 100A, manufactured by FANUC Co., Ltd.). The multipurpose test piece A (total length 168 mm × thickness 4 mm) specified in “Test piece” was prepared. The end face of this test piece was cut, and the cut end face was mirror-finished using a resin plate end face mirror surface machine (Megaro Technica Co., Ltd. product, PRECABILITY PB-500).

(Evaluation method of integrated transmittance)
The long light path measurement accessory device is installed in a spectrophotometer (UH4150, manufactured by Hitachi, Ltd.), and a 50 W halogen lamp is used as a light source, light source front mask 5.6 mm × 2.8 mm, sample front mask 6.0 mm × The spectral transmittance of each of the test pieces in a wavelength range of 380 to 780 nm was measured along the entire length direction of the test piece while using 2.8 mm. The measured spectral transmittances were integrated, and each integrated transmittance was determined by rounding off the tens digit. The integrated transmittance was 31,000 or more as good (indicated by ◎ in the table), less than 31000 as usable (indicated as 中 in the table), and less than 25,000 as defective (indicated as x in the table).

(How to evaluate yellowness)
Based on the spectral transmittance measured in the integrated transmittance evaluation method, each yellowness (hereinafter, YI) was determined using a standard light source D65 in a 10 ° field of view. In addition, when YI is 15 or less good (indicated by ◎ in the table), can be used more than 15 and 30 or less (indicated by 中 in the table), and exceeds 30 is considered defective (indicated by x in the table) .

(Heating test evaluation of molded articles)
The test piece prepared above was placed in an inert oven IPHH-201M manufactured by Espec, and a heating test was performed at 200 ° C. for 72 hours.
Next, the surface of each test piece was visually observed. The conditions after the heating test were evaluated according to the following criteria. The results are shown in Tables 1 to 4.
◎: colorless and transparent
○: Transparent, usable but slightly colored
X: Opaque or dark colored.

In Table 1-Table 4, the raw material of each Example (or reference example) and a comparative example, a mixture ratio, and evaluation result are shown collectively.

The aromatic polycarbonate resin compositions of Examples 14 to 16, 19 to 22, 25 to 27, 30, and 32 to 33 are aromatic polycarbonate resin (A), polyether derivative (B), and specific aromatic compound (C). And a phosphorus-based antioxidant (D) or the like as necessary at a specific ratio. Therefore, a test piece molded from the aromatic polycarbonate resin composition has a high integrated transmittance, a small yellowness, and almost no deterioration after the heating test.

  And the molded article which shape | molded such an aromatic polycarbonate resin composition has small yellowness, it is excellent in a hue, and also there is almost no deterioration after a heat test.

  In contrast, since the aromatic polycarbonate resin compositions of Comparative Examples 1 and 2 have a large amount of the polyether derivative (Compound B1), the integrated transmittance is low and the yellowness is large. Thus, the molded article which shape | molded the aromatic polycarbonate resin composition of the comparative example 1 is inferior to a brightness | luminance and a hue. And it was inferior also to the result after a heating test.

  As described above, the embodiment has been described as an example of the technique in the present invention. A detailed explanation was provided for that purpose.

  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, as those non-essential components are described in the detailed description, it should not be immediately recognized that those non-essential components are essential.

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

  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, is excellent in thermal stability and weather resistance, and furthermore, the aromatic polycarbonate resin of the present invention. Even when a molded article containing the composition is heated, the appearance and optical properties are excellent. Therefore, for example, even when the thin light guide light source having a thickness of about 0.3 mm is used for an application in which the heating state is continued by long-term irradiation to the surface of the light guide plate, the hue of the obtained light guide plate changes and the appearance And industrial properties are extremely high without deterioration of optical characteristics.

Claims (11)

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,
0.1 parts by weight or more and 2.0 parts by weight or less of the polyether derivative (B) with respect to 100 parts by weight of the aromatic polycarbonate resin (A), and 0.0001 parts by weight or more of the aromatic compound (C). Less than 05 parts by weight,
formula:

The polyether derivative (B) is represented by the following formula (1), and includes a polyether derivative having a weight average molecular weight of 500 to 8000,
Formula (1):
RO- (X-O) m (YO) n-R '
(Wherein, R and R ′ each independently represent a hydrogen atom or an alkyl group having 1 to 30 carbon atoms, X represents a linear alkylene group having 2 to 4 carbon atoms or a branched alkylene group, and Y represents Represents a linear alkylene group having 2 to 5 carbon atoms or a branched alkylene group, X and Y may be the same or different, m and n each independently represent 3 to 60, and m + n Shows 6 to 120.)
The polyether derivative represented by the formula (1) is a polyether derivative represented by the formula (4), a polyether derivative represented by the formula (8), a polyether derivative represented by the formula (9), and a formula The aromatic polycarbonate resin composition containing at least 1 sort (s) selected from the polyether derivative represented by (10).
Formula (4):
_{HO- (CH 2 CH 2 O)} m (CH (CH 3) CH 2 O) n-H
(Wherein, m and n each independently represent 3 to 60, and m + n represents 8 to 90);
Formula (8):
_{HO- (CH 2 CH 2 CH 2} CH 2 O) p-H
(Wherein p represents 6 to 100);
Formula (9):
_{HO- (CH (CH 3) CH} 2 O) q-H
(Wherein q represents 7 to 120);
And Formula (10):
_{HO- (CH (C 2 H 5} ) CH 2 O) r-H
(In the formula, r represents 6 to 100.) The polyether derivative represented by the formula (1) further includes a polyether derivative represented by the following formula (2), a polyether derivative represented by the formula (3), and a polyether represented by the formula (5) The aromatic polycarbonate resin composition according to claim 1, comprising at least one selected from a derivative, a polyether derivative represented by Formula (6) and a polyether derivative represented by Formula (7).
Formula (2):
_{HO- (CH 2 CH 2 CH 2} CH 2 O) m (CH (CH 3) CH 2 O) n-H
(Wherein, m and n each independently represent 3 to 60, and m + n represents 8 to 90);
Formula (3):
_{HO- (CH 2 CH 2 CH 2} CH 2 O) m (CH 2 CH 2 CH (CH 3) CH 2 O) n-H
(Wherein, m and n each independently represent 3 to 60, and m + n represents 8 to 90);
Formula (5):
_{RO- (CH 2 CH 2 CH 2} CH 2 O) m (CH (CH 3) CH 2 O) n-H
(Wherein R represents an alkyl group having 1 to 30 carbon atoms, m and n each independently represent 3 to 60, and m + n represents 8 to 90).
Formula (6):
_{RO- (CH 2 CH 2 O)} m (CH (CH 3) CH 2 O) n-H
(Wherein R represents an alkyl group having 1 to 30 carbon atoms, m and n each independently represent 3 to 60, 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) n-H
(In the formula, m and n each independently represent 3 to 60, and m + n represents 8 to 90.)   The aromatic polycarbonate resin composition of Claim 1 or 2 which contains an aromatic compound (C) 0.0005 or more and less than 0.003 weight part with respect to 100 weight part of aromatic polycarbonate resin (A).   The aromatic polycarbonate resin according to any one of claims 1 to 3, further containing up to 0.5 parts by weight of a phosphorus-based antioxidant (D) with respect to 100 parts by weight of the aromatic polycarbonate resin (A). Composition. The aromatic polycarbonate resin composition according to claim 4, wherein the phosphorus-based antioxidant (D) contains a phosphite compound having the following phosphite structure.

The phosphorus-based antioxidant (D) contains at least one or more compounds selected from phosphite compounds represented by the following formulas (11), (12), (13) and (14): The aromatic polycarbonate resin composition according to claim 5.
Formula (11):

[Wherein, R ¹ represents an alkyl group having 1 to 20 carbon atoms or an aryl group optionally substituted with an alkyl group, and a represents an integer of 0 to 3. ]
Formula (12):

[Wherein, R ² , R ³ , R ⁵ and R ⁶ each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, or 6 to 12 carbon atoms] An alkylcycloalkyl group, an aralkyl group having 7 to 12 carbon atoms, or a phenyl group is shown. R ⁴ represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. X represents a single bond, a sulfur atom or the formula: -CHR ⁷ - (wherein, ^{R 7} is a hydrogen atom, an alkyl group or a cycloalkyl group having a carbon number of 5-8 of 1-8 carbon atoms) represented by Group is shown. A is an alkylene group, or a group represented by formula having 1 to 8 carbon atoms: * - COR ⁸ - (wherein, ^{R 8} represents a single bond or an alkylene group having 1 to 8 carbon atoms, * is the bond of the oxygen side A group represented by the following formula: 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 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. ]
Formula (13):

[Wherein, R ⁹ and R ^{10 each} represent an alkyl group having 1 to 20 carbon atoms, or an aryl group which may be substituted by an alkyl group, and b and c each independently represent an integer of 0 to 3. ]
Formula (14):

[In formula, R < ¹¹ > -R < ¹⁸ > shows a C1-C3 alkyl group or an alkenyl group each independently. R ¹¹ and R ¹² , R ¹³ and R ¹⁴ , R ¹⁵ and R ¹⁶ , and R ¹⁷ and R ¹⁸ may bond to each other to form a ring. R ^{19 to} R ²² each independently represent a hydrogen atom or an alkyl group having 1 to 20 carbon atoms. d to g are each independently an integer of 0 to 5; X ^{1 to} X ⁴ each independently represent a single bond or a carbon atom. If X ¹ to X ⁴ is a single ^bond, among the R 11 ^{to R 22,} the functional group linked to the single bond are excluded from the formula (14). ] The aromatic polycarbonate resin composition according to claim 6, satisfying at least one selected from the following.
The phosphite compound represented by the formula (11) contains tris (2,4-di-t-butylphenyl) phosphite;
The phosphite compound represented by the above formula (12) is 2,4,8,10-tetra-t-butyl-6- [3- (3-methyl-4-hydroxy-5-t-butylphenyl ) Propoxy] dibenzo [d, f] [1,3,2] dioxaphosphine;
The phosphite compound represented by the above formula (13) is 3,9-bis (2,6-di-tert-butyl-4-methylphenoxy) -2,4,8,10-tetraoxa-3, Containing 9-diphosphaspiro [5,5] undecane; and the phosphite compound represented by the formula (14) containing bis (2,4-dicumylphenyl) pentaerythritol diphosphite. The method according to any one of claims 1 to 7 , further comprising at least one selected from the group consisting of a heat stabilizer, an antioxidant, a colorant, a mold release agent, a softener, an antistatic agent, and an impact modifier. The aromatic polycarbonate resin composition described. Claim 1-8 optical molded article comprising an aromatic polycarbonate resin composition according to any one of. The optical molded article according to claim 9 , wherein the optical molded article includes a molded article selected from a light guide plate, a surface light emitter material, a light guide film, a light guide for a vehicle and a name plate. The manufacturing method of the molded article for optics including shape | molding the aromatic polycarbonate resin composition in any one of Claims 1-8 .