Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
  • C08K5/005—Stabilisers against oxidation, heat, light, ozone
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/13—Phenols; Phenolates
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/04—Oxygen-containing compounds
  • C08K5/15—Heterocyclic compounds having oxygen in the ring
  • C08K5/151—Heterocyclic compounds having oxygen in the ring having one oxygen atom in the ring
  • C08K5/1515—Three-membered rings
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/49—Phosphorus-containing compounds
  • C08K5/51—Phosphorus bound to oxygen
  • C08K5/52—Phosphorus bound to oxygen only
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
  • C08K5/00—Use of organic ingredients
  • C08K5/49—Phosphorus-containing compounds
  • C08K5/51—Phosphorus bound to oxygen
  • C08K5/52—Phosphorus bound to oxygen only
  • C08K5/524—Esters of phosphorous acids, e.g. of H3PO3
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
  • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
  • C08L71/02—Polyalkylene oxides
• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
  • G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics

Definitions

• 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, they are conventionally used for molded articles such as light guide plates, various lenses and name plates.
• Patent Document 1 discloses an aromatic polycarbonate resin composition for a light guide plate in which a stabilizer and a release agent are blended in an aromatic polycarbonate resin having a specific molecular weight and a specific molecular weight distribution.
• Patent Document 2 discloses a polycarbonate resin composition for an optical molded product, in which a fluorescent whitening agent is blended in a resin component prepared by blending a specific amount of bead-like crosslinked acrylic resin of a specific diameter into a polycarbonate resin.
• Patent Documents 3 to 6 various proposals have been made for resin compositions in which a polycarbonate resin and another material are used in combination in order to obtain excellent light transmittance and improve the brightness of the optical member. It is done.
• the polycarbonate resin compositions disclosed in Patent Documents 3 to 6 are required as materials for light guide plates in recent years (in particular, there is a demand such that there is no decrease in light transmittance even when molded at high temperatures because thin molding is performed) ) 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 characteristics such as heat resistance and mechanical strength originally possessed by polycarbonate resin are not impaired, the heat stability is excellent, the light transmittance is high, and the thin molded product having a thickness of about 0.3 mm is formed.
• an aromatic polycarbonate resin composition which is less likely to cause a decrease in transparency (it is less likely to cause clouding and coloring) when an article (for example, a light guide plate) is exposed to a high temperature due to light irradiation or the like for a very long period of time.
• the polycarbonate resin composition is excellent in heat stability, has high light transmittance, and has a thin thickness of about 0.3 mm which has been molded without impairing the characteristics such as heat resistance and mechanical strength which polycarbonate resin originally has. Even when the product (light guide plate) is exposed for a long time under high temperature conditions by light source irradiation or the like, it is found that the decrease in transparency is small (it is difficult to cause clouding or coloring), and the present invention was completed.
• the present invention is an aromatic polycarbonate resin composition
• 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)
• an aromatic polycarbonate resin composition containing less than 20% by weight and an optical molded article formed by molding the same.
• 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 (it is difficult to cause clouding or coloring).
• the aromatic polycarbonate resin composition according to the embodiment of the present invention comprises 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.
• the “aromatic polycarbonate resin (A)” is a polycarbonate resin based on an aromatic compound, and is particularly limited as long as an aromatic polycarbonate resin composition targeted by the present invention can be obtained. There is nothing to do.
• 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.
• Representative examples include polycarbonate resins made from 2,2-bis (4-hydroxyphenyl) propane (bisphenol A).
• dihydroxy diaryl 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, Bis (hydroxyaryl) cycloalkanes such as -bis (4-hydroxyphenyl) cyclopentane and 1,1-bis (4-hydroxyphenyl) cyclohexan
• dihydroxy diaryl compound may be used in combination with, for example, a trivalent or higher aromatic compound shown below.
• Examples of the trivalent or higher phenolic compounds 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 etc. 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.
• a molecular weight modifier, a catalyst, etc. can be used as needed.
• the polyether derivative (B) is a derivative of a polyether compound and is not particularly limited as long as the aromatic polycarbonate resin composition targeted 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 (Y-O) 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 C2-5 straight-chain alkylene group or branched alkylene group is shown, X and Y may be same or different, m and n respectively independently show 3-60, m + n is 6 to 120 are shown.)
• the weight average molecular weight of the polyether derivative represented by the formula (1) is preferably 500 to 8,000, and more preferably 1,000 to 4,000.
• 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 (Y-O) 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, Y represents And m and n each independently represent 3 to 60, and m + n represents 8 to 90.)
• the weight average molecular weight of the polyether derivative represented by the formula (1-1) is preferably 500 to 8,000, and more preferably 1,000 to 4,000.
• the polyether derivative represented by the formula (1-1) commercially available products can be used.
• the polyether derivative represented by the formula (1) is Following formula (1-2): RO- (X-O) m (Y-O) 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, Y represents 5 represents a linear alkylene group of 5 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 8,000, and more preferably 1,000 to 4,000.
• a commercial item can be used for the polyether derivative represented by Formula (1-2).
• the polyether derivative represented by the formula (1) is Following formula (1-3): RO- (X-O) m (Y-O) 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 branched alkylene group having 2 to 4 carbon atoms, and Y represents 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 8,000, and more preferably 1,000 to 4,000.
• a commercial item can be used for the polyether derivative represented by Formula (1-3).
• the polyether derivative represented by the formula (1) is 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), Polyether derivative represented by formula (5), polyether derivative represented by formula (6), polyether derivative represented by formula (7), polyether derivative represented by formula (8), formula (5) It is preferable to include at least one selected from the group including the polyether derivative represented by 9) and the polyether derivative represented by the formula (10).
• the polyether derivative represented by the formula (1-1) is a polyether derivative represented by the following formula (2), a polyether derivative represented by the formula (3), 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 Formula (5) and a polyether derivative represented by Formula (6).
• the polyether derivative represented by the formula (1-2) includes at least one selected from the group including 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 including the polyether derivative represented by the formula (9) and the polyether derivative represented by the formula (10) Is preferred.
• the modified glycol containing 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) etc. can be used.
• the weight average molecular weight of the polyether derivative represented by the formula (2) is preferably 500 to 8,000, and more preferably 1,000 to 4,000.
• a modified glycol containing a tetramethylene glycol unit and a 2-methyltetramethylene glycol unit is preferable.
• a commercially available product can be used as such a polyether derivative, 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 used.
• the weight average molecular weight of the polyether derivative represented by the formula (3) is preferably 500 to 8,000, and more preferably 1,000 to 4,000.
• the modified glycol containing 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 Corporation made, Unilobe 50DE-25 (weight average molecular weight 1750), Unilobe 75DE-25 (weight average molecular weight 1400) etc. are used. it can.
• the weight average molecular weight of the polyether derivative represented by the formula (4) is preferably 500 to 8,000, and more preferably 1,000 to 4,000.
• 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.)
• polyether derivative represented by the formula (5) a modified glycol of one end butyl group or one end stearyl group containing a tetramethylene glycol unit and a propylene glycol unit is preferable.
• 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) Groups, weight average molecular weight 1000), etc. can be used.
• the weight average molecular weight of the polyether derivative represented by the formula (5) is preferably 500 to 8,000, and more preferably 1,000 to 4,000.
• 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.)
• the polyether derivative represented by the formula (6) a modified glycol of one end butyl group or one end stearyl group containing ethylene glycol unit and propylene glycol unit 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) Groups, weight average molecular weight 2000), unilobe 50 MB-72 (one end butyl group, weight average molecular weight 3000), unilobe 10 MS-250 KB (one end stearyl group, weight average molecular weight 2000), etc. can be used.
• the weight average molecular weight of the polyether derivative represented by the formula (6) is preferably 500 to 8,000, and more preferably 1,000 to 4,000.
• the modified glycol which contains 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.
• the weight average molecular weight of the polyether derivative represented by the formula (7) is preferably 500 to 8,000, and more preferably 1,000 to 4,000.
• polytetramethylene glycol is preferable.
• a commercial item can be used as such a polyether derivative, For example, PTG-650SN (weight average molecular weight 650) by Hodogaya Chemical Industry Co., Ltd., PTG-850SN (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.
• the weight average molecular weight of the polyether derivative (polytetramethylene glycol) represented by the formula (8) is preferably 500 to 8,000, and more preferably 1,000 to 4,000.
• Formula (9) Formula: HO- (CH (CH 3) CH 2 O) q-H (In the formula, q represents 7 to 120.)
• a polypropylene glycol is preferable.
• commercially available products can be used, for example, Polyglycol P2000P (weight average molecular weight 2000) manufactured by Dow Chemical, Uniol D-1000 (weight average molecular weight 1000) manufactured by NOF Corporation.
• Uniol D-2000 (weight average molecular weight 2000), Uniol D-4000 (weight average molecular weight 4000) and the like can be used.
• the weight average molecular weight of the polyether derivative (polypropylene glycol) represented by the formula (9) is preferably 500 to 8,000, and more preferably 1,000 to 4,000.
• polybutylene glycol 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) etc. can be used.
• the weight average molecular weight of the polyether derivative (polybutylene glycol) represented by the formula (10) is preferably 500 to 8,000, and more preferably 1,000 to 4,000.
• the polyether derivative represented by the general formula (1) is generally high in heat resistance, and a molded article obtained by molding an aromatic polycarbonate resin composition containing the polyether derivative at a high temperature has high luminance and light transmittance.
• Each of the polyether derivatives represented by the above formulas (1) to (10) can be produced according to the respective formulas as long as the aromatic polycarbonate resin composition and the optical molded article aimed by the present invention can be obtained.
• Repeating units other than repeating units can be included.
• a repeating unit for example, repeating units based on impurities which may be contained in starting materials of polyether derivatives, repeating units based on an initiator (polymerization initiator) used in polymerization, etc. it can.
• a polymerization initiator When a polymerization initiator is used, the following compounds can be illustrated as a polymerization initiator, for example. Hydrogenated bisphenol A, bisphenol A, isosorbide, glycerin, pentaerythritol, sorbitol, glucose and the like can be exemplified. As a polyether derivative containing a repeating unit based on such a polymerization initiator, for example, polyserine 60DB-2000H (manufactured by NOF Corporation), which may fall under the above-mentioned formula (2), can be exemplified (formula 2- 2).
• the weight average molecular weight of the polyether derivative represented by the formula (2-2) is preferably 500 to 8,000, and more preferably 1,000 to 4,000.
• the polyether derivative (B) used in the present invention has appropriate lipophilicity and is also excellent in compatibility with the aromatic polycarbonate resin (A), the polyether derivative (B) is used as the polyether derivative (B).
• the transparency can be maintained without reducing the transparency of the molded article obtained from the blended aromatic polycarbonate resin composition.
• the weight average molecular weight of such a polyether derivative (B) is preferably 500 to 8,000, and more preferably 1,000 to 4,000.
• CPR unit: dimensionless
• Controlled Polymerization Rate of polyether derivative (B) used in the present invention Index indicating the amount of basic substance in polyether derivative: in accordance with JIS K1557-4 It is preferable that it is 2.0 or less, and it is more preferable that it is 1.0 or less.
• the polyether derivative (B) is excellent in compatibility with the polycarbonate resin, and the decomposition and deterioration are suppressed, and the storage stability is excellent, and the hue of the polycarbonate resin composition obtained Hard to adversely affect
• the CPR of polyserine DCB-2000 corresponding to the polyether derivative (B) represented by the above-mentioned formula (2) is less than 1.0
• the CPR of polyserine 60DB-2000H (manufactured by NOF Corporation) corresponding to B) is less than 1.0
• PTG-1000SN corresponding to the polyether derivative (B) represented by the above-mentioned formula (8)
• the CPR of Hodogaya Chemical Industry Co., Ltd. is less than 1.0.
• the pH of the polyether derivative (B) used in the present invention is preferably 5.0 or more and less than 7.5, and 6. More preferably, it is 0 or more and less than 7.0.
• the pH of the polyether derivative (B) is 5.0 or more and less than 7.5, the decomposition and deterioration are suppressed, the storage stability is excellent, and the hue of the polycarbonate resin composition obtained is unlikely to be adversely affected. .
• the pH of polyserine DCB-2000 corresponding to the polyether derivative (B) represented by the above-mentioned formula (2) is 6.7
• the polyether derivative represented by the above-mentioned formula (2) (B
• the pH of the polyserine 60DB-2000H (manufactured by NOF Corporation), which corresponds to the above) is 6.8, and PTG-1000SN (Hodoya) corresponding to the polyether derivative (B) represented by the above formula (8)
• the pH of Chemical Industry Co., Ltd. is 6.7.
• the temperature (or the temperature at which the weight reduction rate becomes 10%) (measured by thermogravimetric measurement according to JIS K 7120) at which the weight of the polyether derivative (B) used in the present invention is 90% It is preferable that it is 300 degreeC or more, and it is more preferable that it is 330 degreeC or more.
• the temperature to be 90% by weight of the polyether derivative (B) is 300 ° C. or higher, decomposition and deterioration are suppressed, the storage stability is excellent, and the hue of the obtained polycarbonate resin composition is hardly adversely affected.
• the temperature at which the weight of polyserine DCB-2000 corresponding to the polyether derivative (B) represented by the above formula (2) is 90% is 330 ° C.
• the poly represented by the above formula (2) The temperature at which the weight of polyserine 60DB-2000H (manufactured by NOF Corporation) corresponding to the ether derivative (B) is 90% by weight is 400.degree.
• the amount of the polyether derivative is 0.1 to 2.0 parts by weight, preferably 0.3 to 1.8 parts by weight with respect to 100 parts by weight of the aromatic polycarbonate resin (A).
• 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.
• 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, together with the polyether derivative (B), an aromatic compound (C) of the following formula as an essential component.
• 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.
• thermal deterioration due to light irradiation of an optical molded product molded from an aromatic polycarbonate resin composition by a light source (such as an LED light source) for a long 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.
• 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 for a conventional optical molded product is impaired, White turbidity or coloring (light to dark coloring) may occur on the surface of the product.
• the specific aromatic compound (C) of the following formula is particularly effective as a compound that suppresses the deterioration of the polyether derivative (B).
• the polyether derivative (B) is obtained by adding the specific aromatic compound (C) to the polyether derivative (B) in advance or by adding it before melt-kneading to obtain an aromatic polycarbonate resin composition.
• the present invention was completed on the idea that it is possible to suppress the deterioration of (3) to reduce or alleviate the clouding or coloring (light to dark coloring) phenomenon.
• the amount of the aromatic compound (C) used in the embodiment of the present invention is 0.0001 to 0.05 parts by weight with respect to 100 parts by weight of the aromatic polycarbonate resin (A), 0.0005 weight More than part 0.003 weight part is preferred.
• 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.
• 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).
• a phosphorus-based antioxidant D
• 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. .
• the aromatic polycarbonate resin composition of the embodiment of the present invention is characterized in that the phosphorus-based antioxidant (D) is a phosphite compound represented by the following formula (11); It is preferable to include at least one or more compounds selected from phosphoric acid ester compounds, phosphorous acid ester compounds represented by the following formula (13), and phosphorous acid ester compounds represented by the following formula (14).
• D phosphorus-based antioxidant
• the phosphorus-based antioxidant (D) preferably contains, for example, a compound represented by the following formula (11).
• Formula (11) (Wherein, R 1 represents an alkyl group having 1 to 20 carbon atoms, and a represents an integer of 0 to 3)
• R 1 is an alkyl group having 1 to 20 carbon atoms, and more preferably an alkyl group having 1 to 10 carbon atoms.
• Examples of the compound represented by the formula (11) include triphenyl phosphite, tricresyl phosphite, tris (2,4-di-t-butylphenyl) phosphite, trisnonylphenyl phosphite and the like. .
• tris (2,4-di-t-butylphenyl) phosphite is particularly preferable, and, for example, Irgafos 168 ("Irgafos" is a registered trademark of BSF Societas Europe) manufactured by BASF Corp. is commercially available. Are available.
• the phosphorus-based antioxidant (D) preferably contains, for example, a compound represented by the following 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 12 carbon atoms
• 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 a formula: -CHR.
• 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 a 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 And one of Y and Z is a hydroxyl group, an alkohol having 1 to 8 carbon atoms.
• x is a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
• 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 represents an alkyl cycloalkyl group, an aralkyl group having 7 to 12 carbon atoms, or a phenyl group.
• alkyl group having 1 to 8 carbon atoms for example, methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, sec-butyl group, t-butyl group Groups, t-pentyl group, i-octyl group, t-octyl group, 2-ethylhexyl group and the like.
• the cycloalkyl group having 5 to 8 carbon atoms include a cyclopentyl group, a cyclohexyl group, a cycloheptyl group and a cyclooctyl group.
• alkyl cycloalkyl group having 6 to 12 carbon atoms examples include 1-methylcyclopentyl group, 1-methylcyclohexyl group, 1-methyl-4-i-propylcyclohexyl group and the like.
• aralkyl group having 7 to 12 carbon atoms examples include benzyl group, ⁇ -methylbenzyl group, ⁇ , ⁇ -dimethylbenzyl group and the like.
• 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.
• 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.
• R 3 is a carbon number such as methyl group, ethyl group, n-propyl group, i-propyl group, n-butyl group, i-butyl group, sec-butyl group, t-butyl group, t-pentyl group, etc. 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 More preferably, it is an alkyl group having 1 to 5 carbon atoms such as n-butyl group, i-butyl group, sec-butyl group, t-butyl group, t-pentyl group and the like.
• R 4 represents a hydrogen atom or an alkyl group having 1 to 8 carbon atoms.
• alkyl group having 1 to 8 carbon atoms include the alkyl groups exemplified in the description of the aforementioned R 2 , R 3 , R 5 and R 6 .
• 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.
• X represents a single bond, a sulfur atom or a group represented by the formula: —CHR 7 —.
• R 7 in the formula: —CHR 7 — represents a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, or a cycloalkyl group having 5 to 8 carbon atoms.
• Examples of the alkyl group having 1 to 8 carbon atoms and the cycloalkyl group having 5 to 8 carbon atoms include, for example, the alkyl group and the cycloalkyl group exemplified in the description of R 2 , R 3 , R 5 and R 6 respectively.
• X is a methylene group substituted by a single bond, a methylene group, or a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, an n-butyl group, an i-butyl group, a t-butyl group or the like. Is preferably, and more preferably a single bond.
• A is an alkylene group, or a group represented by formula having 1 to 8 carbon atoms: * - COR 8 - a group represented by.
• an alkylene group having 1 to 8 carbon atoms for example, methylene group, ethylene group, propylene group, butylene group, pentamethylene group, hexamethylene group, octamethylene group, 2,2-dimethyl-1,3-propylene group, etc. And preferably is a propylene group.
• R 8 in the formula: * -COR 8- represents a single bond or an alkylene group having 1 to 8 carbon atoms.
• Examples of the alkylene group having 1 to 8 carbon atoms representing R 8 include the alkylene groups exemplified in the description of the above A.
• R 8 is preferably a single bond or an ethylene group.
• * in the formula: * -COR 8- is a bond at the oxygen side, and indicates that a carbonyl group is bonded to an oxygen atom of a phosphite group.
• 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
• Examples of the aralkyloxy group having 7 to 12 carbon atoms include benzyloxy, ⁇ -methylbenzyloxy, ⁇ , ⁇ -dimethylbenzyloxy and the like.
• Examples of the alkyl group having 1 to 8 carbon atoms include the alkyl groups exemplified in the description of the aforementioned R 2 , R 3 , R 5 and R 6 .
• the phosphorus-based antioxidant (D) preferably contains, for example, a compound represented by the following formula (13).
• 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; 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, phenyl bisphenol A pentaerythritol diphosphite and the like.
• Bis (2,4-di-tert-butylphenyl) pentaerythritol diphosphite is commercially available under the trade name “Adecastab PEP-24G” manufactured by Adeka.
• Adekastab PEP-36 (“Adekastab" is a registered trademark) manufactured by ADEKA CO., LTD. Is commercially available.
• the phosphorus-based antioxidant (D) preferably contains, for example, a compound represented by the following formula (14).
• 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 each independently represent
• X 1 to X 4 each independently represent a single bond or a carbon atom
• X 1 to X 4 are a single bond, of R 11 to R 22 ,
• the functional group linked to the single bond is excluded from the general formula (14).
• the compound represented by the formula (14) include, for example, 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 B.) Containing propoxy] dibenzo [d, f] [1,3,2] dioxaphosphepine;
• 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, 9-Diphosphaspiro [5,5] undecane; and the phosphite compound represented by the above-mentioned formula (14) contains bis (2,4
• 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).
• an ultraviolet absorber which is a component for further improving the weather resistance of the resulting aromatic polycarbonate resin composition
• an aromatic polycarbonate resin It can be suitably used according to the use of the molded article obtained by shape
• 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.
• 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.
• benzotriazole compounds include 2- (2-hydroxy-5-t-octylphenyl) benzotriazole and 2- (3-tert-butyl-2-hydroxy-5-methylphenyl) as benzotriazole compounds.
• 2- (2-hydroxy-5-t-octylphenyl) benzotriazole and the like are particularly preferable, and, for example, TINUVIN 329 (TINUVIN is a registered trademark) manufactured by BASF, and Seasorb manufactured by Shipro Kasei Co., Ltd. C. 709, Chemisorb 79 manufactured by Chemi-Pro Chemical Co., Ltd., etc. are commercially available.
• triazine compounds examples 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 etc. are mentioned, For example, TINUVIN 1577 made from BASF, etc. are commercially available.
• oxalic acid anilide type compound for example, Sanduvor VSU manufactured by Clariant Japan Co., Ltd. and the like are commercially available.
• benzophenone compounds include 2,4-dihydroxybenzophenone, 2-hydroxy-4-n-octoxybenzophenone and the like.
• the amount of the UV absorber is 0 to 1.0 parts by weight, preferably 0 to 0.5 parts by weight, per 100 parts by weight of the aromatic polycarbonate resin (A). 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).
• an 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) has at least one epoxy group in the molecule, and is not particularly limited as long as an aromatic polycarbonate resin composition targeted by the present invention can be obtained.
• the epoxy compound (E) is, for example, 3 ′, 4′-epoxycyclohexylmethyl-3,4-epoxycyclohexanecarboxylate, epoxidized soybean oil, ⁇ -caprolactone modified 3 ′, 4′-epoxycyclohexylmethyl 3,4- Epoxy cyclohexane carboxylate, acrylic group-containing acrylic / styrene-based polymer, 2,2-bis (4-hydroxycyclohexyl) propane-diglycidyl ether, etc. 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 include .002 to 0.1 parts by mass, and it is particularly preferable to include 0.005 to 0.05 parts by mass.
• the aromatic polycarbonate resin composition of the embodiment of the present invention is an optical molded article when it 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). 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 Etc. can be prevented.
• the aromatic polycarbonate resin composition according to the embodiment is, for example, a heat stabilizer, another antioxidant, a colorant, a release agent, a softener, or an antistatic agent as long as the effects of the present invention are not impaired.
• Additives, various additives such as impact modifiers, polymers other than the aromatic polycarbonate resin (A), etc. may be appropriately blended.
• the aromatic polycarbonate resin composition according to the embodiment of the present invention is a mixture of 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), the said various additives, and 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 there are no particular limitations on the shape and size of the pellets of the aromatic polycarbonate resin composition obtained as described above, and any shape and size possessed by general resin pellets may be used.
• 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
• the diameter of the cross-sectional circle is preferably about 1 to 6 mm.
• 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.
• optical molded article of the embodiment of the present invention can be obtained by molding the above-mentioned aromatic polycarbonate resin composition.
• the production method of the optical molded article is not particularly limited as long as the optical molded article aimed by the present invention can be obtained, and for example, an aromatic polycarbonate resin composition by a known injection molding method, compression molding method or the like And the like.
• the optical molded article according to the present invention is suitable, for example, as a light guide plate, a surface light emitter material, a light guide film, a light guide for a vehicle, a name plate, and the like.
• the embodiment has been described as an example of the present invention.
• 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.
• Aromatic polycarbonate resin (A) Polycarbonate resin synthesized from bisphenol A and carbonyl chloride Viscosity average molecular weight: 15,000, SD Polyca 200-80 (trade name) manufactured by Sumika Polycarbonate Co., Ltd., "SD Polyca” is a registered trademark of Sumika Polycarbonate Co., Ltd. , Hereinafter also referred to as "PC” or (A1)
• 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)
• 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)
• Modified glycol of one terminal butyl group consisting of tetramethylene glycol unit and propylene glycol unit Weight average molecular weight: 1000, Polythelin BC-1000 (trade name) manufactured by NOF Corporation, also referred to below (B4)
• Modified glycol consisting of ethylene glycol unit and propylene glycol unit (random copolymerization) Weight average molecular weight: 1750, Unilobe 50 DE-25 (trade name) manufactured by NOF Corporation, hereinafter referred to as (B5)
• Modified glycol consisting of tetramethylene glycol unit and 2-methyltetramethylene glycol unit (random copolymerization) Weight average molecular weight: 2000, PTG-L2000 (trade name) manufactured by Hodogaya Chemical Industry Co., Ltd., hereinafter also referred to as (B9)
• Aromatic compound (C) 3,5-Di-t-butyl-4-hydroxytoluene (Wako Pure Chemical Industries, Ltd., hereinafter also referred to as (C1))
• Epoxy compound (E) 3 ', 4'-Epoxycyclohexylmethyl-3,4-epoxycyclohexylcarboxylate [Celloxide 2021 P (trade name) manufactured by Daicel Chemical Industries, Ltd., hereinafter referred to as (E1)]
• Examples 1 to 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 (TEX30 ⁇ 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 1 to 33 and Comparative Examples 1 and 2. However, about Example 7, after mixing a compound (C) and a compound (B) beforehand, it mixed with the other raw material, and obtained the pellet of the aromatic polycarbonate resin composition of Example 7.
• the pellets obtained in the Examples and Comparative Examples are each substantially elliptic cylinder, and the aggregate consisting of 100 pellets has an average length of about 5.1 mm to about 5.4 mm, and an elliptical cross section.
• the average value of the major axis of the diamond 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.
• the obtained pellets are dried at 120 ° C. for 4 hours or more, and then, using an injection molding machine (manufactured by FANUC Co., Ltd., ROBOSHOT S2000i 100A), JIS K 7139 “Plastic- 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).
• 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 ⁇ With 2.8 mm, the spectral transmittance of each of the test pieces in the wavelength range of 380 to 780 nm was measured in the full length direction of the test pieces at 1 nm intervals. 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 ⁇ in the table), and less than 25,000 as defective (indicated as x in the table).
• each yellowness (hereinafter, YI) was determined using a standard light source D65 in a 10 ° field of view.
• YI yellowness
• Tables 1 to 4 show the raw materials, blending ratios, and evaluation results of the respective Examples and Comparative Examples.
• the aromatic polycarbonate resin compositions of Examples 1 to 33 contain an aromatic polycarbonate resin (A), a polyether derivative (B) and a specific aromatic compound (C), and if necessary, a phosphorus-based antioxidant (D) Etc., each at a specific rate. 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.
• molded such an aromatic polycarbonate resin composition has small yellowness, is excellent in a hue, and also has almost no deterioration after a heating test.
• the aromatic polycarbonate resin compositions of Comparative Examples 1 and 2 contain a large amount of the polyether derivative (Compound B1), the integrated transmittance is low and the degree of yellowness is large.
• molded the aromatic polycarbonate resin composition of the comparative example 1 is inferior to a brightness
• 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 exemplify the above technology. 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.
• the aromatic polycarbonate resin composition of the present invention is not impaired in the properties such as heat resistance and mechanical strength originally possessed by the polycarbonate resin, and is excellent in thermal stability and weatherability, and further, the aromatic polycarbonate resin of the present invention Even when the molded article containing the composition is heated, it has excellent appearance and optical properties. Therefore, for example, even when used for applications where heating is continued by long-term irradiation of the light guide plate surface of a thin light guide light source having a thickness of about 0.3 mm, the hue of the obtained light guide plate changes and the appearance And industrial properties are extremely high without deterioration of optical characteristics.
• Related Application is based on the Paris Convention No. 4 based on Application No. 2018-1641 41 filed in Japan on January 26, 2018 and Application No. 2018-156195 filed in Japan on August 23, 2018. Claim a priority based on the Article. The contents of these basic applications are incorporated herein by reference.

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