TWI706991B - Aromatic polycarbonate resin composition and optical molded product - Google Patents

Abstract

The present invention provides a polycarbonate resin that does not impair the original characteristics of heat resistance, mechanical strength, etc., has excellent thermal stability, high light transmittance, and excellent light transmittance even when the obtained molded product is heated The aromatic polycarbonate resin composition. The aromatic polycarbonate resin composition of the present invention is characterized in that it contains an aromatic polycarbonate resin (A), a polysiloxane compound (B), a fatty acid ester (C), and a specific aromatic compound (D). ), and relative to 100 parts by weight of the aromatic polycarbonate resin (A), containing 0.01 to 1.0 parts by weight of the polysiloxane compound (B), 0.01 to 0.7 parts by weight of the fatty acid ester (C), and 0.0001 Part by weight or more and less than 0.05 part by weight of the specific aromatic compound (D).

Description

Aromatic polycarbonate resin composition and optical molded product

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

Polycarbonate resin is excellent in impact resistance, heat resistance, and transparency, so it has been used in molded products such as light guide plates, various lenses, and nameplates.

For example, Patent Document 1 discloses an aromatic polycarbonate resin composition for light guide plates 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 specific amount of a particulate cross-linked acrylic resin of a specific diameter is blended into a polycarbonate resin and a fluorescent whitening agent is blended into the resin component .

In addition, for example, as disclosed in Patent Document 3 or Patent Document 4, various resin compositions in which polycarbonate resin is used in combination with other materials in order to obtain excellent light transmittance and improve the brightness of optical parts have been proposed. [Prior Technical Literature] [Patent Literature]

[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. 2013-234233

[The problem to be solved by the invention]

However, the polycarbonate resin composition disclosed in Patent Document 3 or Patent Document 4 cannot sufficiently meet the recent requirements as a material for light guide plates (especially when the thin-walled molding is performed at a high temperature for molding processing). The light rate will not decrease and other requirements). Furthermore, in recent years, it has gradually been required that even when thin molded products (such as light guide plates) of about 0.3 mm obtained by molding processing are exposed to high temperature conditions such as light irradiation for an extremely long time, there is less reduction in transparency (white turbidity or Less coloring) materials.

Furthermore, for example, materials for light guides for vehicles such as vehicles and Shinkansen are gradually required. Vehicle light guides are, for example, light guides for daytime lighting installed near headlights and other vehicle headlights, fog lights and other auxiliary headlights, or daytime running lights and other vehicle lamps, and are used as a guide A lighting fixture with high visibility by lighting up the LED and other light sources provided near the light.

In recent years, lighting has been maintained during the bright hours of the day to make oncoming cars or pedestrians aware of their existence, or dress up and light the lights. For this reason, daylighting has continued to develop. Especially in vehicles such as automobiles or locomotives equipped with daylight lamps near the headlights and/or rear lights, a large number of such demands appeared earlier than Japan, centered on the Nordic countries. The daylight lamp includes a light guide and a light source such as an LED installed in the vicinity thereof. For example, a lamp disclosed in Patent Document 5 is known.

Regarding this application, polymethyl methacrylate (hereinafter referred to as PMMA), which is an acrylic resin, has been used as a resin for light guides. However, in terms of high heat resistance and high mechanical strength, PMMA has gradually changed Replace polycarbonate resin. Compared with PMMA, polycarbonate resin has excellent mechanical, thermal, and electrical properties, but its light transmittance is slightly inferior. Therefore, the light guide made of polycarbonate resin has the problem of low brightness compared with the light guide made of PMMA. However, as described above, the resin composition disclosed in Patent Document 2 or Patent Document 4 cannot sufficiently meet the requirements of materials for light guides in recent years, and it is gradually required that molded products after molding are even exposed to high temperatures such as light irradiation. When exposed to the conditions for a long time, the transparency of the material is less reduced (white turbidity or less coloring).

The purpose of the present invention is to provide a thin molded product with a thickness of about 0.3 mm that does not impair the original characteristics of polycarbonate resin such as heat resistance and mechanical strength, has excellent thermal stability, high light transmittance, and is even after molding. For example, when the light guide plate is exposed to a high temperature such as light irradiation for an extremely long time, it is not easy to produce an aromatic polycarbonate resin composition with reduced transparency (not easy to produce white turbidity and coloring); to make the aromatic polycarbonate Optical molded products (light guide plates, light guides for vehicles, etc.) formed by molding a resin composition. [Technical means to solve the problem]

The inventors of the present invention conducted intensive research to solve this problem and found that each specific amount of aromatic polycarbonate resin (A), polysiloxane compound (B), fatty acid ester (C) and the following formula The aromatic polycarbonate resin composition of the aromatic compound (D) does not impair the original properties of the polycarbonate resin such as heat resistance and mechanical strength, has excellent thermal stability, high light transmittance, and is obtained even after molding When the thin molded product (light guide plate) with a thickness of about 0.3 mm is exposed to high temperature conditions such as light source irradiation for a long time, the transparency is less reduced (white turbidity or coloring is not easy to occur), thus completing the present invention.

[發明之效果] That is, the present invention provides an aromatic polycarbonate resin composition, and optical molded products (light guide plates, vehicle light guides, etc.) formed by molding the aromatic polycarbonate resin composition. : It contains aromatic polycarbonate resin (A), polysiloxane compound (B), fatty acid ester (C) and aromatic compound (D) represented by the following formula, and is relative to aromatic poly Carbonate resin (A) 100 parts by weight, containing 0.01-1.0 parts by weight of polysiloxane compound (B), 0.01-0.7 parts by weight of fatty acid ester (C), and 0.0001 parts by weight or more but less than 0.05 parts by weight Aromatic compound (D). Formula: [化1]

[Effects of Invention]

The polycarbonate resin composition of the present invention (optical molded products, such as light guide plates and light guides for vehicles, etc.) does not impair the heat resistance, mechanical strength and other properties inherent in polycarbonate resin, has excellent thermal stability, and transmits light Even if the obtained molded product is exposed to a hot weather environment and/or high temperature conditions such as light source irradiation for a long time, the transparency is not easy to decrease (it is not easy to produce white turbidity or coloring). Therefore, for example, regardless of the thickness of the thin molded product (light guide plate) or vehicle light guide, etc., the hue is not easy to change, and it is not easy to cause appearance degradation (deterioration), even if it is caused by the external environment or light source. In the case of prolonged exposure under high temperature conditions, it is not easy to produce a decrease in transparency (not easy to produce white turbidity or coloring), and the industrial use value is extremely high.

The embodiment is described in detail below. Among them, there are cases where excessive detailed description is omitted. For example, there may be cases where detailed descriptions of known items are omitted or repeated descriptions of substantially the same configuration. The reason is to avoid making the following explanations unnecessarily lengthy and easy for the industry to understand.

Furthermore, the inventors of the present invention provide the following description for the purpose of allowing the industry to fully understand the present invention, and do not intend to limit the subject matter described in the scope of the invention application by these.

The aromatic polycarbonate resin composition of the embodiment of the present invention contains an aromatic polycarbonate resin (A), a polysiloxane compound (B), a fatty acid ester (C), and a specific aromatic compound (D), It may also contain other components such as phosphorus antioxidant (E) and/or epoxy compound (F) as needed.

In the embodiment of the present invention, the aromatic polycarbonate resin (A) is a polycarbonate resin based on an aromatic compound. As long as the target aromatic polycarbonate resin composition of the present invention can be obtained, there is no particular limitation. As such an aromatic polycarbonate resin, for example, the phosgene method by reacting various dihydroxydiaryl compounds with phosgene, or the reaction of dihydroxydiaryl compounds with carbonates such as diphenyl carbonate can be exemplified. Polymer obtained by transesterification method. Representative examples include polycarbonate resins made from 2,2-bis(4-hydroxyphenyl)propane (bisphenol A).

As the above-mentioned dihydroxydiaryl compound, in addition to bisphenol A, for example, bis(4-hydroxyphenyl)methane, 1,1-bis(4-hydroxyphenyl)ethane, 2,2-bisphenol A (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(4-hydroxyphenyl)cyclopentane, 1,1-bis(4-hydroxyphenyl)cyclohexane and other bis(hydroxyaryl)cycloalkanes; 4,4'-dihydroxydiphenyl ether, Dihydroxy diaryl ethers such as 4,4'-dihydroxy-3,3'-dimethyldiphenyl ether; dihydroxy diaryl sulfides such as 4,4'-dihydroxydiphenyl sulfide; 4 ,4'-dihydroxydiphenyl sulfene, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulfene and other dihydroxy diaryl sulfenes; 4,4'-dihydroxy Dihydroxydiaryl sulphate, 4,4'-dihydroxy-3,3'-dimethyldiphenyl sulphate, etc. These can be used alone or in combination. In addition to these, piperidine, dipiperidylhydroquinone, resorcinol, 4,4'-dihydroxybiphenyl, etc. can also be used in combination.

Furthermore, the above-mentioned dihydroxydiaryl compound can be used in combination with, for example, an aromatic compound having a valence of three or more shown below.

As the above-mentioned trivalent or higher phenolic compound, for example, phloroglucinol, 4,6-dimethyl-2,4,6-tris-(4-hydroxyphenyl)-heptene, 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 10,000 to 100,000, more preferably 12,000 to 30,000. Furthermore, when manufacturing such an aromatic polycarbonate resin (A), a molecular weight regulator, a catalyst, etc. may be used as needed.

In the embodiment of the present invention, the polysiloxane compound (B) is generally understood as a compound of a polysiloxane compound, and there is no particular limitation as long as the target resin composition of the present invention can be obtained. The polysiloxane compound (B) preferably contains at least one group selected from the group consisting of an alkoxy group, a vinyl group and a phenyl group. For example, it is preferable to introduce a methoxy group, a vinyl group, and a phenyl group into the silicone compound. At least one reactive silicone compound (organopolysiloxane, etc.), etc. The polysiloxane compound (B) can lower the melt viscosity when the polycarbonate resin composition is pelletized to further suppress yellowing, and can further prevent appearance defects such as silver bars during molding. As the polysiloxane compound, for example, compounds such as polydimethylsiloxane, polymethylethylsiloxane, polymethylphenylsiloxane, etc. can be used. The silicon atom has a carbon number of 1 ~12 hydrocarbon-based polysiloxane compounds.

In addition, pure silicone oil can also be used as the silicone compound (B). Pure polysiloxane oil is a polysiloxane compound in which the organic group bonded to the silicon atom is a methyl group, a phenyl group or a hydrogen atom. As a specific example of pure polysiloxane oil, one can exemplify: dimethyl polysiloxane oil in which the side chain and ends of polysiloxane are both methyl groups, and a part of the side chain of polysiloxane is phenyl Methyl phenyl polysiloxane oil and methylhydrosiloxane oil in which a part of the side chain of polysiloxane is hydrogen atom. Modified silicone oil can also be used. It is a polysiloxane compound with an organic group introduced into the side chain or end of pure polysiloxane oil. According to the introduction position of the organic group, it is classified into side chain type, two end cap type, single end type and side chain Two-end type. Examples of organic groups introduced into the modified silicone oil include hydrogen atoms, alkyl groups, aryl groups, aralkyl groups, fluoroalkyl groups, amino groups, amide groups, epoxy groups, mercapto groups, carboxyl groups, and polyether groups. , Hydroxy, alkoxy, aryloxy, polyoxyalkylene, vinyl, acryl, methacryl, etc.

As the polysiloxane compound (B), commercially available products can be used. More specifically, for example, an organopolysiloxane having a phenyl group, a methoxy group, and a vinyl group (manufactured by Shin-Etsu Chemical Co., Ltd., trade name KR511), and alkoxy-containing methyl phenyl polysiloxane Methylphenylsiloxane (trade name KR213), methylphenylsiloxane (manufactured by Toray Dow Corning Silicone, trade name PH1560), methylphenylsiloxane (manufactured by Toray Dow Corning Silicone, trade name SH556), methyl Phenylsiloxane (manufactured by Toray Dow Corning Silicone, trade name SH710) and the like.

The amount of the polysiloxane compound (B) is 0.01 to 1.0 part by weight, preferably 0.02 to 0.5 part by weight, and more preferably 0.04 to 0.3 part by weight relative to 100 parts by weight of the polycarbonate resin (A). When the blending amount of the polysiloxane compound (B) is 0.01 part by weight or more and 1.0 part by weight or less, the transmittance and hue of the aromatic polycarbonate resin composition can be further improved, and the aromatic polycarbonate resin The hue and transmittance of the composition are better.

The resin composition of the embodiment of the present invention may contain fatty acid ester (C). The fatty acid ester (C) functions together with the polysiloxane (B) and the specific aromatic compound (D) described later, and does not impair the heat resistance and mechanical strength of the obtained polycarbonate resin composition It has excellent thermal stability and high light transmittance, and it can be used even when the thin molded product (light guide plate) with a thickness of about 0.3 mm obtained by the molding process is exposed to high temperature conditions such as light source irradiation for a long time. Components with less transparency reduction (not easy to produce white turbidity or coloring).

For example, it is possible to effectively prevent thermal deterioration (white turbidity or coloration) of an optical molded product molded from an aromatic polycarbonate resin composition due to long-term light irradiation from a light source (LED light source, etc.). If the optical molded product is exposed to severe conditions such as hot weather and/or continuously exposed to light for a long time, the surface temperature of the molded product may increase. The aromatic polycarbonate contained in the aromatic polycarbonate resin composition The ester resin (A) may gradually undergo thermal deterioration. Furthermore, the fatty acid ester (C) present in the resin composition may be gradually modified, impairing the transparency (brightness or permeability) expected from the aromatic polycarbonate resin composition used in ordinary optical molded products. It may cause white turbidity or coloration (light to dark coloration) on the surface of the molded product.

In view of this subject, the inventors have made intensive research and found that as a compound that inhibits degradation such as modification of fatty acid ester (C) or the resulting coloration, a specific aromatic compound (D) is particularly effective. Adding the specific aromatic compound (D) before the aromatic polycarbonate resin composition is melt-kneaded can inhibit the deterioration of the fatty acid ester (C) in the molded product, and can reduce or alleviate the phenomenon of white turbidity or coloring (light to dark coloring) , Thereby completing the present invention.

In the embodiment of the present invention, a general condensation compound of aliphatic carboxylic acid and alcohol can be used as the fatty acid ester (C), and there is no particular limitation as long as the target resin composition of the present invention can be obtained.

As said aliphatic carboxylic acid, saturated or unsaturated monocarboxylic acid, dicarboxylic acid, tricarboxylic acid, etc. are mentioned. Furthermore, the aliphatic carboxylic acid also includes alicyclic carboxylic acid. Among these, monocarboxylic acid and dicarboxylic acid having 6 to 36 carbon atoms are preferred, and saturated monocarboxylic acid having 6 to 36 carbon atoms is more preferred.

Specific examples of the aforementioned aliphatic carboxylic acids include, for example, palmitic acid, stearic acid, valeric acid, caproic acid, capric acid, lauric acid, arachidic acid, behenic acid, tetracosonic acid, ceric acid, and beeswax. Acid, tritetradecanoic acid, montanic acid, glutaric acid, adipic acid, azelaic acid, etc.

Examples of the above alcohol include saturated or unsaturated monohydric alcohols and polyhydric alcohols, and these alcohols may have substituents such as fluorine atoms, chlorine atoms, bromine atoms, and aryl groups. Among them, saturated alcohols with carbon number 30 or less are preferred, and aliphatic saturated monohydric alcohols and aliphatic saturated polyols with carbon number 30 or less are more preferred. Furthermore, aliphatic alcohols also include alicyclic alcohols.

As specific examples of the above alcohols, for example, octanol, decyl alcohol, dodecanol, tetradecanol, stearyl alcohol, behenyl alcohol, ethylene glycol, diethylene glycol, glycerin, pentaerythritol, 2, 2-Dihydroxyperfluoropropanol, neopentyl glycol, di-trimethylolpropane, dipentaerythritol, etc.

Specific examples of fatty acid esters (C) include, for example, behenyl behenate, octyl lauryl behenate, stearyl stearate, glycerol monopalmitate, and glycerol monostearate. Ester, glycerol monooleate, glyceryl distearate, glycerol tristearate, pentaerythritol monopalmitate, pentaerythritol monostearate, pentaerythritol distearate, pentaerythritol tristearate, pentaerythritol Tetrastearate, etc., can be used alone or in combination of two or more kinds. Among them, stearates such as glycerol monostearate, pentaerythritol stearate, and pentaerythritol distearate are preferred. For example, RIKEMAL S-100A manufactured by Riken Vitamin Co., Ltd. is commercially available. Trade name) or Unistar H476DP ("Unistar" is a registered trademark) manufactured by NOF Corporation, and Loxiol VPG861 (trade name, manufactured by Cognis).

The amount of the fatty acid ester (C) can be, for example, 0.01 to 0.7 parts by weight, preferably 0.03 to 0.5 parts by weight, and more preferably 0.05 to 0.2 parts by weight relative to 100 parts by weight of the polycarbonate resin (A). When the amount of fatty acid ester (C) is 0.01 to 0.7 parts by weight, yellowing can be further suppressed, and the hue can be further improved.

Relative to 100 parts by weight of the aromatic polycarbonate resin (A), the amount of the specific aromatic compound (D) used in the embodiment of the present invention is 0.0001 parts by weight or more and less than 0.05 parts by weight, preferably 0.0005 parts by weight Above 0.003 parts by weight or less. When the amount of the aromatic compound (D) is 0.0001 to 0.05 parts by weight, white turbidity or coloring can be further suppressed, and the high level of light transmittance and hue required for the optical molded body can be further achieved.

In the embodiment of the present invention, as described above, a phosphorus-based antioxidant (E) can be further contained as needed. As long as the target aromatic polycarbonate resin composition of the present invention can be obtained, the phosphorus antioxidant (E) in the embodiment of the present invention is not particularly limited, and preferably contains phosphorous acid having the following phosphite structure Ester compound. [化2]

The aromatic polycarbonate resin composition of the embodiment of the present invention preferably contains a phosphorus antioxidant (E) selected from phosphite compounds represented by the following formula (1) and those represented by the following formula (2) At least one compound of a phosphite compound, a phosphite compound represented by the following formula (3), and a phosphite compound represented by the following formula (4). Phosphorus antioxidants (E) function together with fatty acid esters (C) and specific aromatic compounds (D) described later, and do not impair the heat resistance, heat resistance, etc. originally possessed by the obtained polycarbonate resin composition. Mechanical strength and other characteristics, excellent thermal stability, high light transmittance, and even when the thin molded product (light guide plate) with a thickness of about 0.3 mm obtained by the molding process is exposed to high temperature conditions such as light source irradiation for a long time, it Ingredients that reduce the transparency (not easy to produce white turbidity or color).

The phosphorus antioxidant (E) preferably contains, for example, a compound represented by the following formula (1).

(式中，R ¹表示碳數1～20之烷基，a表示0～3之整數) Formula (1): [化3]

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

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

As the compound represented by the formula (1), for example, triphenyl phosphite, tricresyl phosphite, tris(2,4-di-tert-butylphenyl) phosphite, tris(nonyl phosphite) Phenyl) esters and the like. Among them, tris(2,4-di-tert-butylphenyl) phosphite is particularly preferred. For example, Irgafos 168 manufactured by BASF Corporation ("Irgafos" is a registered trademark of BASF Societas・Europaea) is commercially available. .

The phosphorus antioxidant (E) preferably contains, for example, a compound represented by the following formula (2).

(式中，R ⁹及R ¹⁰分別獨立地表示碳數1～20之烷基或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 (2): [化4]

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

Examples of the compound represented by the formula (2) include bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite, phenyl bisphenol A pentaerythritol diphosphite, and the like. Bis(2,4-di-tert-butylphenyl) pentaerythritol diphosphite is commercially available under the trade name "Adekastab PEP-24G" manufactured by ADEKA. Commercially, you can start with Adekastab PEP-36 ("Adekastab" is a registered trademark) manufactured by ADEKA (Stock). The phosphorus antioxidant (E) preferably contains a compound represented by the following formula (3), for example.

(式中，R ²、R ³、R ⁵及R ⁶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；R ⁴表示氫原子或碳數1～8之烷基；X表示單鍵、硫原子或式:-CHR ⁷-(此處，R ⁷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:＊-COR ⁸-(此處，R ⁸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 (3): [化5]

(In the formula, R ² , R ³ , R ⁵ and R ⁶ each 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 having 7 to 12 carbons or phenyl group; R ⁴ represents a hydrogen atom or an alkyl group having 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 having 1 to 8 carbons or a cycloalkyl group having 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, and * represents a group represented by the bonding bond on the oxygen side); any one of Y and Z represents a hydroxyl group and an alkane with 1 to 8 carbons An oxy group or an aralkyloxy group having 7 to 12 carbons, the other represents a hydrogen atom or an alkyl group having 1 to 8 carbons)

In formula (3), R ² , R ³ , R ⁵ and R ⁶ each independently represent a hydrogen atom, an alkyl group with 1 to 8 carbons, a cycloalkyl group with 5 to 8 carbons, and an alkane with 6 to 12 carbons. Cycloalkyl, C7-12 aralkyl 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, tertiary butyl, and first Tripentyl, isooctyl, tertiary octyl, 2-ethylhexyl, etc. Examples of the cycloalkyl group having 5 to 8 carbon atoms include cyclopentyl, cyclohexyl, cycloheptyl, and cyclooctyl. Examples of the alkylcycloalkyl group having 6 to 12 carbon atoms include 1-methylcyclopentyl, 1-methylcyclohexyl, and 1-methyl-4-isopropylcyclohexyl. Examples of the aralkyl group having 7 to 12 carbon atoms include benzyl, α-methylbenzyl, α,α-dimethylbenzyl, and the like.

Preferably, R ² , R ³ and R ⁵ are each independently an alkyl group having 1 to 8 carbon atoms, a cycloalkyl group having 5 to 8 carbon atoms, or an alkylcycloalkyl group having 6 to 12 carbon atoms. Particularly preferably, R ² and R ⁵ are each independently a tertiary alkyl group such as tertiary butyl, tertiary pentyl, and tertiary octyl, cyclohexyl, or 1-methylcyclohexyl. Particularly preferably, R ³ is an alkane with 1 to 5 carbon atoms such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, second butyl, tertiary butyl, tertiary pentyl, etc. The group is more preferably methyl, tertiary butyl or tertiary pentyl.

The above-mentioned R ^{6 is} preferably a hydrogen atom, an alkyl group having 1 to 8 carbons or a cycloalkyl group having 5 to 8 carbons, and more preferably a hydrogen atom, methyl, ethyl, n-propyl, isopropyl, n- C1-C5 alkyl groups such as butyl, isobutyl, second butyl, tertiary butyl, and tertiary pentyl.

In the formula (3), R ⁴ represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms. 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. It is particularly preferable that R ⁴ is 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 (3), 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 groups and cycloalkyl groups exemplified in the above description of R ² , R ³ , R ⁵ and R ⁶ , respectively. In particular, X is preferably a single bond, a methylene group, or a methylene group substituted with methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tertiary butyl, etc., and more Best is a single key.

In the formula (3), 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, ethylene, propylene, butylene, pentamethylene, hexamethylene, octamethylene, 2,2- Dimethyl-1,3-propylene and the like are preferably propylene. 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. In addition, the * in the formula: *-COR ⁸ -is a bonding bond on the oxygen side, indicating that the carbonyl group is bonded to the oxygen atom of the phosphite group.

In formula (3), any one of Y and Z represents a hydroxyl group, an alkoxy group having 1 to 8 carbons or an aralkoxy group having 7 to 12 carbons, and the other represents a hydrogen atom or a carbon number of 1-8之alkyl. Examples of the alkoxy group having 1 to 8 carbon atoms include a methoxy group, an ethoxy group, a propoxy group, a tertiary butoxy group, and a pentyloxy group. Examples of the aralkyloxy group having 7 to 12 carbon atoms include benzyloxy group, α-methylbenzyloxy group, α,α-dimethylbenzyloxy group, 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 the compound represented by the formula (3), for example, 2,4,8,10-tetra-tert-butyl-6-[3-(3-methyl-4-hydroxy-5-tert-butylbenzene) Yl)propoxy]dibenzo[d,f][1,3,2]dioxaphosphole, 6-[3-(3,5-di-tert-butyl-4-hydroxybenzene Yl)propoxy]-2,4,8,10-tetra-tert-butyldibenzo[d,f][1,3,2]dioxaphosphole, 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] Dioxaphosphatane, 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]dioxaphosphate, etc. Among them, especially in the case of using the obtained aromatic polycarbonate resin composition 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]dioxaphosphene, such as commercial On the other hand, Sumilizer GP ("Sumilizer" is a registered trademark) manufactured by Sumitomo Chemical Co., Ltd. can be obtained.

The phosphorus antioxidant (E) preferably contains a compound represented by the following formula (4), for example.

Formula (4): [化6]

(In the formula, R ¹¹ to R ¹⁸ each independently represent an alkyl group 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 may mutually be Bonded to form a ring; R ¹⁹ to R ²² each independently represent a hydrogen atom or an alkyl group with 1 to 20 carbons; d to g are each independently an integer of 0 to 5; X ¹ to X ⁴ each independently represent a 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 not included in the general formula (4))

As a specific example of the compound represented by formula (4), for example, bis(2,4-dicumylphenyl) pentaerythritol diphosphite may be mentioned. Commercially, it can obtain the trade name "Doverphos (registered trademark) S-9228" manufactured by Dover Chemical, and the trade name "Adekastab PEP-45" manufactured by ADEKA (bis(2,4-dicumylphenyl) ) Pentaerythritol diphosphite).

The amount of the phosphorus antioxidant (E) is, for example, 0.01 to 0.3 parts by weight, preferably 0.01 to 0.1 parts by weight, more preferably 0.04 to 0.1 parts by weight, relative to 100 parts by weight of the aromatic polycarbonate resin (A), More preferably, it is 0.04 to 0.08 parts by weight. When the amount of the phosphorus antioxidant (E) is 0.01 to 0.3 parts by weight, the light transmittance and hue can be further improved.

In addition to the above components, the aromatic polycarbonate resin composition of the embodiment of the present invention may further contain an epoxy compound (F). When the aromatic polycarbonate resin composition further contains the epoxy compound (F), the excellent optical characteristics required for optical molded products can be maintained and improved, and the obtained aromatic polycarbonate resin is not included The initial optical properties of the molded product of the composition are degraded, and the deterioration due to the use condition or the deterioration of aging can be prevented.

The epoxy compound (F) has at least one epoxy group in the molecule, and is not particularly limited as long as the aromatic polycarbonate resin composition of the present invention can be obtained. The epoxy compound (F) may contain, for example, 3,4-epoxycyclohexanecarboxylic acid 3',4'-epoxycyclohexyl methyl ester, epoxidized soybean oil, and ε-caprolactone modified 3,4-ring Oxycyclohexanecarboxylic acid 3',4'-epoxycyclohexyl methyl ester, epoxy-containing acrylic acid-styrene polymer, 2,2-bis(4-hydroxycyclohexyl)propane-diglycidyl ether Wait. The epoxy compound (F) preferably contains 3',4'-epoxycyclohexyl methyl 3,4-epoxycyclohexanecarboxylic acid.

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 (F) relative to 100 parts by mass of the aromatic polycarbonate resin (A), and more preferably contains 0.002 to 0.1 parts by mass, particularly preferably 0.005 to 0.05 parts by mass.

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 (F) relative to 100 parts by mass of the aromatic polycarbonate resin (A), the Excellent optical properties required for optical molded products, and improve the initial optical properties (cumulative transmittance and yellowness) of molded products containing the obtained aromatic polycarbonate resin composition to prevent deterioration or aging due to use conditions Deterioration such as deterioration.

In addition to the above components, the aromatic polycarbonate resin composition of the embodiment of the present invention may further contain acrylic resin (G). In the embodiment of the present invention, the acrylic resin (G) is generally understood as the resin of the acrylic resin, and as long as the target resin composition of the present invention can be obtained, there is no particular limitation. When the aromatic polycarbonate resin composition further contains acrylic resin (G), it can maintain excellent optical characteristics such as improving the total light transmittance required for optical molded products, and not include the obtained aromatic The initial optical properties of the molded product of the polycarbonate resin composition are deteriorated, and deterioration such as deterioration or aging deterioration due to use conditions is prevented. Acrylic resin refers to a polymer in which monomer units of acrylic acid, acrylate, acrylonitrile and their derivatives are used as repeating units, and refers to homopolymers or copolymers with styrene, butadiene, etc. Specifically, it is polyacrylic acid, polymethyl methacrylate (PMMA), polyacrylonitrile, ethyl acrylate-acrylic acid-2-chloroethyl copolymer, n-butyl acrylate acrylonitrile copolymer, acrylonitrile-styrene Copolymer, acrylonitrile-butadiene copolymer, acrylonitrile-butadiene-styrene copolymer, etc. Among these, polymethyl methacrylate (PMMA) can be used particularly preferably. The polymethyl methacrylate (PMMA) may be known, but it is preferably produced by bulk polymerization of a methyl methacrylate monomer in the presence of a peroxide or an azo polymerization initiator.

The weight average molecular weight of the acrylic resin (G) is preferably 2 to 100,000, more preferably 20,000 to 60,000. If the weight average molecular weight is within the above-mentioned range, the phase separation between the polycarbonate resin and the acrylic resin is less likely to occur during molding, and there is less fear of adverse effects on the light guide when the light guide plate is made. In the case of containing acrylic resin (G), relative to 100 parts by mass of polycarbonate resin (A), preferably 0.01 to 0.5 parts by mass, more preferably 0.02 to 0.4 parts by mass, and particularly preferably 0.03 to 0.15 parts by mass Copies.

In addition to the above components, in the aromatic polycarbonate resin composition of the embodiment, for example, the aromatic polycarbonate obtained by molding the aromatic polycarbonate resin composition can be appropriately used according to the use of the molded article obtained by molding the aromatic polycarbonate resin composition. The weather resistance component of the ester resin composition is the ultraviolet absorber.

As the ultraviolet absorber, for example, benzotriazole-based compounds, triazole-based compounds, benzophenone-based compounds, oxaniline-based compounds and other polycarbonate resins that are usually formulated in polycarbonate resins can be used alone or in combination. Absorbent.

Examples of benzotriazole-based compounds include 2-(2-hydroxy-5-tert-octylphenyl) benzotriazole, 2-(3-tert-butyl-2-hydroxy-5-methyl) Phenyl)-5-chloro-2H-benzotriazole, 2-(3,5-di-thirdpentyl-2-hydroxyphenyl)-2H-benzotriazole, 2-(2H-benzo Triazol-2-yl)-4-methyl-6-(3,4,5,6-tetrahydrophthaliminomethyl)phenol, 2-(2-hydroxy-4-octyloxy) Phenyl)-2H-benzotriazole, 2-(2-hydroxy-5-third octylphenyl)-2H-benzotriazole, 2-[2'-hydroxy-3,5-bis(1 ,1-Dimethylbenzyl)phenyl]-2H-benzotriazole, 2,2'-methylenebis[6-(2H-benzotriazol-2-yl)4-(1,1, 3,3-Tetramethylbutyl)phenol] etc. Among them, 2-(2-hydroxy-5-tertiary octylphenyl)benzotriazole is particularly preferred. For example, TINUVIN 329 (TINUVIN is a registered trademark) manufactured by BASF and Shipro Kasei (shares) are commercially available. Seesorb 709 manufactured by Chemipro, Chemisorb 79 manufactured by Chemipro Chemical Co., Ltd., etc.

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

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

As a benzophenone type compound, 2, 4- dihydroxy benzophenone, 2-hydroxy-4-n-octyloxy benzophenone, etc. are mentioned, for example.

The amount of the ultraviolet absorber is 0 to 1.0 part by weight, preferably 0 to 0.5 part by weight with respect to 100 parts by weight of the aromatic polycarbonate resin (A). When the amount of the ultraviolet absorber exceeds 1.0 part by weight, the initial hue of the obtained aromatic polycarbonate resin composition may decrease. Moreover, 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 can be greatly exhibited.

Furthermore, within the range that does not impair the effects of the present invention, the aromatic polycarbonate resin composition of the embodiment may be appropriately blended with heat stabilizers, other antioxidants, colorants, mold release agents, softeners, and antistatic agents. Various additives such as additives, impact modifiers, polymers other than aromatic polycarbonate resin (A), etc.

The aromatic polycarbonate resin composition of the embodiment of the present invention can be exemplified by adding aromatic polycarbonate resin (A), polysiloxane (B), fatty acid ester (C) and specific aromatic compound (D) Mix, and if necessary mix the phosphorus antioxidant (E), epoxy compound (F), the above various additives, and polymers such as acrylic resin (G) other than aromatic polycarbonate resin (A), etc. The manufacturing method. As long as the target aromatic polycarbonate resin composition of the present invention can be obtained, its production method is not particularly limited, and the type and amount of each component can be appropriately adjusted. The mixing method of the components is also not particularly limited. For example, a method of mixing with a known mixer such as a drum and a belt mixer, or a method of melting and kneading with an extruder can be exemplified. By these methods, particles of the aromatic polycarbonate resin composition can be easily obtained. The specific aromatic compound (D) may be mixed before melt kneading, or may be added or mixed in advance to the fatty acid ester (C).

The shape and size of the particles of the aromatic polycarbonate resin composition obtained in the above manner are not particularly limited, as long as they are the shape and size of general resin particles. For example, as the shape of the particles, elliptical columnar shape, cylindrical shape, etc. can be cited. As the size of the particles, the length is preferably about 2-8 mm. In the case of an elliptical cylinder, the long diameter of the cross-sectional ellipse is preferably about 2-8 mm, and the short diameter is about 1-4 mm. In this case, the diameter of the cross-sectional circle is preferably about 1 to 6 mm. Furthermore, each particle obtained may be of this size, all particles forming the particle aggregate may be of this size, or the average value of the particle aggregate may be of this size, and there is no particular limitation.

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

As long as the target optical molded product of the present invention (such as a light guide plate and a light guide for a vehicle, etc.) can be obtained, the manufacturing method of the optical molded product is not particularly limited. For example, a known injection molding method, a compression molding method, etc. And the method of shaping the aromatic polycarbonate resin composition.

The optical molded article of the present invention is suitable as, for example, light guide plates, surface light-emitting body materials, light guide films, light guides for vehicles, name plates, and the like. Especially preferred are light guide plates and vehicle light guides (e.g., including headlights and other vehicle headlights and auxiliary headlights such as fog lights, and daytime running lights and other vehicle lamps and other light guides for daytime lighting Pieces).

As described above, the embodiments are described as examples of the present invention. However, the technology of the present invention is not limited to this, and can also be applied to embodiments with appropriate changes, substitutions, additions, and omissions. [Example]

Hereinafter, the present invention will be explained in detail through examples, but the present invention is not limited to these examples. Furthermore, unless otherwise specified, "parts" and "%" are based on weight.

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

2. Polysiloxane compound (B) 2-1. Organopolysiloxane with phenyl group, methoxy group and vinyl group, manufactured by Shin-Etsu Chemical Co., Ltd., trade name KR511, also referred to as "B1" below

2-2. Methylphenyl polysiloxane, manufactured by Toray Dow Corning Silicone, trade name SH556, also referred to as "B2" below

2-3. Methylphenyl polysiloxane, manufactured by Toray Dow Corning Silicone, trade name PH1560, also referred to as "B3" below

2-4. Alkoxy-containing methylphenyl polysiloxane, manufactured by Shin-Etsu Chemical Co., Ltd., trade name KR213, also referred to as "B4" below

3. Fatty acid ester (C): Glycerol monostearate, manufactured by Riken Vitamin Co., Ltd., trade name RIKEMAL S-100A, also referred to as "C" below

4. Aromatic compound (D): 3,5-Di-tert-butyl-4-hydroxytoluene [Manufactured by Wako Pure Chemical Industries Co., Ltd., also referred to as (D1) below]

[BASF公司製造之Irgafos168(商品名)、以下亦稱為(E1)] 5. Phosphorus antioxidant (E): 5-1. Tris (2,4-di-tert-butylphenyl) phosphite represented by the following formula [Chemical Formula 7]

[Irgafos168 (trade name) manufactured by BASF, also referred to as (E1) below]

[ADEKA製造之Adekastab PEP-36(商品名)、以下亦稱為(E2)] 5-2. Bis(2,4-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite represented by the following formula (IUPAC name: 3,9-bis(2,6-di Tributyl-4-methylphenoxy)-2,4,8,10-tetraoxa-3,9-diphosphaspiro[5,5]undecane) [Chemical 8]

[Adekastab PEP-36 (trade name) manufactured by ADEKA, also referred to as (E2) below]

6. Epoxy compound (F) 3,4-epoxycyclohexane carboxylic acid 3',4'-epoxycyclohexyl methyl ester [Celloxide 2021P (trade name) manufactured by Daicel Chemical Industry Co., Ltd., also referred to as (F1) below]

7. Acrylic resin (G) Polymethyl methacrylate (PMMA) [Dianal BR83 (trade name) manufactured by Mitsubishi Chemical Corporation, also referred to as (G1) below]

(Examples 1 to 13 and Comparative Examples 1 to 6) Put the above-mentioned raw materials into the drum at the ratio shown in Table 1 to Table 3, and dry-mix for 10 minutes, then use a twin-screw extruder (manufactured by Nippon Steel Co., Ltd., TEX30α) at a melting temperature of 220°C Melt and kneaded to obtain pellets of each aromatic polycarbonate resin composition of Examples 1 to 11 and Comparative Examples 1 to 6. Furthermore, the particles obtained in the examples and comparative examples are all roughly elliptical cylinders, the average length of each aggregate containing 100 particles is about 5.1 mm to about 5.4 mm, and the average length of the cross-sectional ellipse is About 4.1 mm to about 4.3 mm, the average value of the short diameter is about 2.2 mm to about 2.3 mm.

Using the obtained pellets, each evaluation test piece was prepared in accordance with the following method, and used for evaluation. The results are shown in Tables 1-2.

(How to make the test piece) After drying the obtained pellets at 120°C for 4 hours or more, use an injection molding machine (manufactured by FANUC Co., Ltd., ROBOSHOT S2000i100A) to produce JIS K 7139 "Plastic-Test Pieces" at a molding temperature of 280°C and a mold temperature of 80°C "The specified multi-purpose test piece type A (full length 168 mm×thickness 4 mm). Cut the end face of the test piece. For the cut end face, use a resin plate end face mirror machine (manufactured by MEGARO TECHNICA (stock), Pla-Beauty PB-500) for mirror processing.

(Evaluation method of cumulative transmittance) Set up a long optical path measurement accessory device on the spectrophotometer (manufactured by Hitachi, Ltd., UH4150), use a 50 W halogen lamp as the light source, and use the light source front shield 5.6 mm×2.8 mm, and the sample front shield 6.0 mm ×2.8 mm, in this state, in the wavelength range of 380 to 780 nm, measure the spectral transmittance of each 1 nm of the test piece over the entire length of the test piece. By accumulating the measured spectral transmittance and rounding to the nearest hundred, each accumulated transmittance is calculated. In addition, the cumulative transmittance is 32000 or more as good (indicated by ◎ in the table), 30000 or more and less than 32000 as usable (indicated by ○ in the table), and less than 30000 as bad (in the table) Expressed by ×).

(Yellowness evaluation method) Regarding the evaluation method of cumulative transmittance, based on the measured spectral transmittance, the standard light source D65 is used to obtain the yellowness (hereinafter referred to as YI) under a 10-degree field of view. In addition, YI of 12 or less is regarded as good (indicated by ◎ in the table), more than 12 and less than 15 as usable (indicated by ○ in the table), and more than 15 as bad (indicated by × in the table) ).

(Evaluation of heating test of molded products) The test piece produced above was set in a non-oxidizing oven IPHH-201M manufactured by Espec, and a heating test was performed at 200°C for 72 hours. Next, visually observe the surface of each test piece. According to the following criteria, evaluate the state after the heating test. The results are shown in Tables 1 to 3. ◎: Colorless and transparent. ○: Transparent and usable, but slightly colored. ×: White turbidity or darker coloration.

Tables 1 to 3 show the raw materials, blending ratios, and evaluation results of the respective examples and comparative examples.

[Table 1] Example 1 2 3 4 5 6 7 8 9 (A) (A1) 100 100 100 100 100 100 100 100 100 (B) (B1) 0.04 0.1 0.3 0.04 0.04 0.04 0.04 0.04 0.04 (C) (C1) 0.05 0.05 0.2 0.05 0.05 0.05 0.05 0.05 0.05 (D) (D1) 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 0.002 (E) (E1) 0.05 0.04 0.05 (E2) 0.05 0.05 0.05 (F) (F1) 0.02 0.02 0.02 Cumulative transmittance 31100 30400 30100 31100 31500 31800 30500 31100 31200 ○ ○ ○ ○ ○ ○ ○ ○ ○ Yellowness YI 14.4 14.5 14.9 13.8 13.6 13.4 14.9 13.4 14.7 ○ ○ ○ ○ ○ ○ ○ ○ ○ Heating test ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎ ◎

[Table 2] Example 10 11 12 13 (A) (A1) 100 100 100 100 (B) (B1) 0.1 (B2) 0.5 (B3) 0.04 (B4) 0.04 (C) (C1) 0.03 0.05 0.05 0.05 (D) (D1) 0.002 0.002 0.002 0.002 (E) (E1) 0.02 0.02 (E2) 0.05 0.02 0.02 (F) (F1) 0.03 (G) (G1) 0.1 Cumulative transmittance 32100 31200 30300 30500 Evaluation ◎ ○ ○ ○ Yellowness 11.9 13.5 14.9 14.7 Evaluation ◎ ○ ○ ○ Heating test ◎ ◎ ◎ ◎

[table 3] Comparative example 1 2 3 4 5 (A) (A1) 100 100 100 100 100 (B) (B1) 0.005 1.5 0.04 0.04 0.04 (C) (C1) 0.05 0.05 0.005 1 0.05 (D) (D1) 0.002 0.002 0.002 0.002 1 Cumulative transmittance 29800 23800 30200 31000 28700 Evaluation × × ○ ○ × Yellowness YI 15.2 48.9 15.6 13.6 19.2 Evaluation × × × ○ × Heating test ○ - ◎ × ×

The aromatic polycarbonate resin composition of Examples 1-13 includes aromatic polycarbonate resin (A), polysiloxane (B), fatty acid ester (C) and specific aromatic compound (D), as required Phosphorus antioxidant (E), epoxy compound (F), and acrylic resin (G) are contained in specific ratios. Therefore, the test piece formed from the aromatic polycarbonate resin composition has a high cumulative transmittance, low yellowness, and almost no deterioration after the heating test.

In addition, the molded article obtained by molding the aromatic polycarbonate resin composition has a low yellowness, an excellent hue, and there is almost no deterioration after a heating test.

In contrast, the molded article obtained by molding the aromatic polycarbonate resin composition of Comparative Examples 1 to 5 had at least any one of brightness, hue, and results after the heating test deteriorated.

The embodiment is described as above as an example of the technique in the present invention. To this end, provide detailed instructions.

Therefore, the constituent elements described in the detailed description include not only constituent elements necessary to solve the problem, but also constituent elements that are not necessary to solve the problem in order to illustrate the above-mentioned technology. Therefore, it should not be considered that since these non-essential components are recorded in the detailed description, these non-essential components are directly deemed necessary.

In addition, the above-mentioned embodiment is for exemplifying the technology of the present invention, so various changes, substitutions, additions, omissions, etc. can be made within the scope of the invention application or its equivalent scope. [Industrial availability]

The aromatic polycarbonate resin composition of the present invention (and the molded product for optical use formed by molding it) does not impair the heat resistance, mechanical strength and other properties inherent in polycarbonate resin, and has excellent thermal stability and weather resistance. And even when the molded article containing the aromatic polycarbonate resin composition of the present invention is heated, the appearance and optical properties are excellent. Therefore, for example, it is used for applications 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 is continued, and for example, when it is used for a light guide for vehicles, etc. The hue of the light guide plate and the light guide for vehicles will not change, and the appearance or optical characteristics will not be reduced. The industrial use value is extremely high.

Claims (14)

An aromatic polycarbonate resin composition, characterized in that it contains aromatic polycarbonate resin (A), polysiloxane compound (B), fatty acid ester (C), and an aromatic compound represented by the following formula Group compound (D), and relative to 100 parts by weight of aromatic polycarbonate resin (A), containing 0.01 to 1.0 parts by weight of polysiloxane compound (B) and 0.01 to 0.7 parts by weight of fatty acid ester (C ) And more than 0.0001 parts by weight and less than 0.05 parts by weight of the aromatic compound (D); formula: [化1]

. The aromatic polycarbonate resin composition of claim 1, wherein the polysiloxane compound (B) is a polysiloxane compound containing at least one group selected from the group consisting of alkoxy, vinyl, and phenyl. The aromatic polycarbonate resin composition of claim 1, wherein the polysiloxane compound (B) is an organopolysiloxane having a phenyl group, a methoxy group, and a vinyl group. The aromatic polycarbonate resin composition of claim 1, wherein the fatty acid ester (C) is a condensation compound of an aliphatic carboxylic acid and an alcohol. The aromatic polycarbonate resin composition of claim 1, wherein the fatty acid ester (C) is glycerol monostearate or pentaerythritol stearate. The aromatic polycarbonate resin composition of claim 1, which further contains 0.01 to 0.3 parts by mass of a phosphorus-based antioxidant having the following phosphite structure based on 100 parts by weight of the above-mentioned aromatic polycarbonate resin (A) Oxidant (E); [化2]

. The aromatic polycarbonate resin composition of claim 1, which further contains 0.001 to 0.2 parts by mass of the epoxy compound (F) based on 100 parts by weight of the above-mentioned aromatic polycarbonate resin (A). The aromatic polycarbonate resin composition of claim 7, wherein the above-mentioned epoxy compound (F) contains 3',4'-epoxycyclohexyl methyl 3,4-epoxycyclohexanecarboxylic acid. The aromatic polycarbonate resin composition according to claim 1, which further contains 0.01 to 0.5 parts by mass of acrylic resin (G) based on 100 parts by weight of the above-mentioned aromatic polycarbonate resin (A). The aromatic polycarbonate resin composition according to claim 9, wherein the acrylic resin (G) is polymethyl methacrylate. The aromatic polycarbonate resin composition according to any one of claims 1 to 10, which further contains a heat stabilizer, an antioxidant, a coloring agent, a release agent, a softener, an antistatic agent, and an impact modifier At least one of the group consisting of. An optical molded product containing the aromatic polycarbonate resin composition according to any one of claims 1 to 10. The optical molded product of claim 12, wherein the optical molded product contains a molded product selected from a light guide film, a light guide for a vehicle, and a nameplate. A method for manufacturing an optical molded product, which comprises molding an aromatic polycarbonate resin composition according to any one of claims 1 to 10.