WO2019026784A1 - 芳香族ポリカーボネート樹脂組成物及び光学成形品 - Google Patents
芳香族ポリカーボネート樹脂組成物及び光学成形品 Download PDFInfo
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- WO2019026784A1 WO2019026784A1 PCT/JP2018/028227 JP2018028227W WO2019026784A1 WO 2019026784 A1 WO2019026784 A1 WO 2019026784A1 JP 2018028227 W JP2018028227 W JP 2018028227W WO 2019026784 A1 WO2019026784 A1 WO 2019026784A1
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- polycarbonate resin
- aromatic polycarbonate
- resin composition
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- 0 CC(Oc1ccc(*c(cc2)ccc2OC)cc1)=O Chemical compound CC(Oc1ccc(*c(cc2)ccc2OC)cc1)=O 0.000 description 2
- ULPDSNLBZMHGPI-UHFFFAOYSA-N CC1CC2OC2CC1 Chemical compound CC1CC2OC2CC1 ULPDSNLBZMHGPI-UHFFFAOYSA-N 0.000 description 2
- SLJFKNONPLNAPF-UHFFFAOYSA-N C=CC1CC2OC2CC1 Chemical compound C=CC1CC2OC2CC1 SLJFKNONPLNAPF-UHFFFAOYSA-N 0.000 description 1
- JAJOMHTWKUQATA-UHFFFAOYSA-N CC1C(C2)OC2CC1 Chemical compound CC1C(C2)OC2CC1 JAJOMHTWKUQATA-UHFFFAOYSA-N 0.000 description 1
- LLKNNNQHBVPROI-UHFFFAOYSA-N O=NNC1CC2OC2CC1 Chemical compound O=NNC1CC2OC2CC1 LLKNNNQHBVPROI-UHFFFAOYSA-N 0.000 description 1
- VHWVOVYJBYPGSE-UHFFFAOYSA-N O=[O]C1CC2OC2CC1 Chemical compound O=[O]C1CC2OC2CC1 VHWVOVYJBYPGSE-UHFFFAOYSA-N 0.000 description 1
Classifications
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- 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
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/04—Aromatic polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/04—Aromatic polycarbonates
- C08G64/045—Aromatic polycarbonates containing aliphatic unsaturation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
-
- 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
- C08K5/10—Esters; Ether-esters
- C08K5/101—Esters; Ether-esters of monocarboxylic acids
- C08K5/103—Esters; Ether-esters of monocarboxylic acids with polyalcohols
-
- 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
- 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
- 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
- C08K5/526—Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
-
- 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
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- 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
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- 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
- G02B1/045—Light guides
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0065—Manufacturing aspects; Material aspects
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- 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
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
Definitions
- the present invention relates to an aromatic polycarbonate resin composition and an optical molded article. Specifically, an aromatic polycarbonate resin composition containing an aromatic polycarbonate resin, excellent in initial YI value at molding, long-term heat resistance, and long-term heat and humidity resistance, and useful for producing an optical molded article such as a light guide plate
- the present invention relates to an optical molded product molded using the same.
- Aromatic polycarbonate resins are excellent in transparency, mechanical properties, thermal properties, electrical properties, weatherability and the like, and are used for optical molded articles such as light guide plates, lenses and optical fibers by taking advantage of the properties.
- polycarbonate resins including aromatic polycarbonate resins are colored due to the influence of thermal deterioration during molding and the influence of oxidative deterioration when exposed to high temperatures for a long time, and the color tone is deteriorated, and machines such as impact resistance etc.
- phosphorus compounds are usually added as antioxidants.
- Patent Document 1 discloses that long-term heat resistance and long-term heat and humidity resistance are improved by containing a specific amount of aryl phosphine and a specific amount of a cycloaliphatic epoxy compound.
- Patent document 2 is excellent in long-term heat resistance by containing a specific diphosphite compound and an alicyclic epoxy compound with respect to an aromatic polycarbonate resin, and is cracked even when exposed to a high temperature and high humidity environment for a long time. It is disclosed that a molded article such as a light guide plate or the like which does not occur is obtained.
- Patent Document 3 even if molding is performed in a wide temperature range, the optical characteristics are deteriorated due to deterioration at molding, by containing a specific amount of a phosphorus compound having an aryl group and a polyether compound with respect to the aromatic polycarbonate resin. No polycarbonate resin composition is disclosed.
- Patent Documents 1 to 3 further improvement is required for lowering the initial YI value at the time of molding at a high temperature of 320 ° C. Moreover, for example, for a long time of 3000 hours, a material having excellent heat resistance and moisture and heat resistance has been required.
- the present invention is excellent in initial YI value, long-term heat resistance, and long-term heat and humidity resistance, and is an aromatic polycarbonate resin composition which can be suitably used for optical components such as a light guide plate for vehicles used particularly under severe environment An object and an optical component molded therefrom are provided.
- the present inventors found that, in the resin composition containing the aromatic polycarbonate resin, the alicyclic epoxy compound, the polyether compound having a polyoxyalkylene structure, and the phosphorus compound are contained in specific amounts.
- the present invention has been accomplished by finding that the above object can be achieved by That is, the present invention provides the following aromatic polycarbonate resin composition and an optical molded article.
- aromatic polycarbonate resin composition comprising: ⁇ 0.6 parts by mass, and 0.005 to 1 parts by mass of a phosphorus compound (D), The difference between the YI value and the initial YI value after 3000 hours in an environment of 85 ° C. and 85% humidity of a molded article of 5 mm thickness obtained by molding the aromatic polycarbonate resin composition at 320 ° C. is 3.0 or less There is an aromatic polycarbonate resin composition.
- the alicyclic epoxy compound (B) is one of 3,4-epoxycyclohexylmethyl-3 ′, 4′-epoxycyclohexanecarboxylate and / or 2,2-bis (hydroxymethyl) -1-butanol
- R C1 O groups a plurality of R C1 are identical to each other) It may be an alkylene group or an alkylene group having different carbon numbers, and in the n R C2 O groups, a plurality of R C2 may be the same alkylene group as each other, or may be an alkylene group having different carbon numbers .
- the R C1 and R C2 is ethylene group, a propylene group, an alkylene group selected from tetramethylene group, and at least one of R C1 and R C2 are either ethylene group and propylene group
- the aromatic polycarbonate resin composition according to the above [5], which is [7] Any one of the above [1] to [6], wherein the polyether compound (C) is at least one selected from polyethylene glycol, polypropylene glycol, and polyoxyethylene glycol-polyoxypropylene glycol The aromatic polycarbonate resin composition as described in 1).
- the phosphorus compound having a phosphite structure is bis (2,4-dicumylphenyl) pentaerythritol diphosphite, bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphate
- the aromatic polycarbonate resin composition according to the above [9] which is at least one selected from phosphite and tris (2,4-di-tert-butylphenyl) phosphite.
- the molded object which consists of an aromatic polycarbonate resin composition of this invention is excellent in initial stage YI value, long-term heat resistance, and long-term moisture-heat resistance.
- the said molded object is suitable as optical molded articles, such as a light guide component for vehicles, and various light guide plates.
- the aromatic polycarbonate resin composition of the present invention is a poly having a polyoxyalkylene structure and 0.01 to 0.1 parts by mass of an alicyclic epoxy compound (B) with respect to 100 parts by mass of an aromatic polycarbonate resin (A).
- An aromatic polycarbonate resin composition comprising 0.2 to 0.6 parts by mass of an ether compound (C) and 0.005 to 1 parts by mass of a phosphorus compound (D), wherein the aromatic polycarbonate resin is The difference between the YI value and the initial YI value after 3000 hours under an environment of 85 ° C. and 85% humidity of a 5 mm-thick molded article obtained by molding the composition at 320 ° C. is 3.0 or less.
- the aromatic polycarbonate resin composition and the optical molded article of the present invention will be described in detail. In the present specification, the definition considered to be preferable can be arbitrarily adopted, and a combination of preferable ones is more preferable.
- the aromatic polycarbonate resin composition of the present invention contains an aromatic polycarbonate resin (A).
- the aromatic polycarbonate resin (A) is not particularly limited, and those produced by known methods can be used. For example, one prepared by solution method (interfacial polycondensation method) or melting method (ester exchange method) of dihydric phenol and carbonate precursor, ie, reaction of dihydric phenol with phosgene in the presence of a termination agent What is manufactured by making it react by the transesterification method of dihydric phenol, a diphenyl carbonate, etc. in presence of the interfacial polycondensation method to make or the end terminator, etc. can be used.
- 2,2-bis (4-hydroxyphenyl) propane [bisphenol A], bis (4-hydroxyphenyl) methane, 1,1-bis (4-hydroxyphenyl) ethane, 2,2-bis (4-hydroxy-) 3,5-Dimethylphenyl) propane, 4,4'-dihydroxydiphenyl, bis (4-hydroxyphenyl) cycloalkane, bis (4-hydroxyphenyl) oxide, bis (4-hydroxyphenyl) sulfide, bis (4-hydroxy) Examples include phenyl) sulfone, bis (4-hydroxyphenyl) sulfoxide and bis (4-hydroxyphenyl) ketone.
- hydroquinone, resorcin and catechol can also be mentioned. Each of these may be used alone, or two or more of these may be used in combination. Among these, those of bis (hydroxyphenyl) alkane type are preferable, and bisphenol A is particularly preferable.
- bisphenol A as dihydric phenol, a polycarbonate resin having a bisphenol A structure can be obtained.
- the carbonate precursor is a carbonyl halide, a carbonyl ester, a haloformate or the like, and specifically phosgene, a dihaloformate of dihydric phenol, diphenyl carbonate, dimethyl carbonate, diethyl carbonate or the like.
- Component (A) in the present invention may have a branched structure.
- 1,1,1-tris (4-hydroxyphenyl) ethane, ⁇ , ⁇ ′, ⁇ ′ ′-tris (4-hydroxyphenyl) -1,3,5-triisopropylbenzene, fluoroglycine examples thereof include trimellitic acid and 1,3-bis (o-cresol).
- a monovalent carboxylic acid and its derivative, and a monovalent phenol can be used.
- the aromatic polycarbonate resin (A) is preferably a polycarbonate resin having a repeating unit whose main chain is represented by the following general formula (I).
- R A1 and R A2 each independently represent an alkyl group having 1 to 6 carbon atoms or an alkoxy group having 1 to 6 carbon atoms
- X represents a single bond, an alkylene group having 1 to 8 carbon atoms, or the carbon number 2 to 8 alkylidene, cycloalkyl having 5 to 15 carbon atoms, cycloalkylidene having 5 to 15 carbon atoms, -S-, -SO-, -SO 2- , -O- or -CO- a and b each independently represent an integer of 0 to 4.
- Examples of the alkyl group represented by R A1 and R A2 include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, and various butyl groups ("various” includes linear and any branched ones. And the same applies hereinafter), various pentyl groups and various hexyl groups.
- As an alkoxy group shown by RA1 and RA2 the case where an alkyl group site
- Each of R A1 and R A2 is preferably an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.
- Examples of the alkylene group represented by X include a methylene group, ethylene group, trimethylene group, tetramethylene group, hexamethylene group and the like, and an alkylene group having 1 to 5 carbon atoms is preferable.
- Examples of the alkylidene group represented by X include ethylidene group, isopropylidene group and the like.
- Examples of the cycloalkylene group represented by X include a cyclopentadiyl group, a cyclohexanediyl group, a cyclooctanediyl group and the like, and a cycloalkylene group having a carbon number of 5 to 10 is preferable.
- Examples of the cycloalkylidene group represented by X include a cyclohexylidene group, 3,5,5-trimethylcyclohexylidene group, 2-adamantylidene group and the like, and a cycloalkylidene group having a carbon number of 5 to 10 is Preferably, a cycloalkylidene group having 5 to 8 carbon atoms is more preferable.
- a and b each independently represent an integer of 0 to 4, preferably 0 to 2, more preferably 0 or 1.
- the aromatic polycarbonate resin (A) preferably contains a polycarbonate resin having a bisphenol A structure, from the viewpoints of transparency, mechanical properties, thermal properties and the like of the resulting molded article.
- Specific examples of the polycarbonate resin having a bisphenol A structure include those in which X is an isopropylidene group in the general formula (I).
- the content of the polycarbonate resin having a bisphenol A structure in the aromatic polycarbonate resin (A) is preferably 50 to 100% by mass, more preferably 75 to 100% by mass, and still more preferably 85 to 100% by mass.
- the viscosity average molecular weight (Mv) of the aromatic polycarbonate resin (A) is usually 10,000 to 50,000, preferably 13,000 to 35,000, more preferably 14,000 to 20,000. is there.
- the viscosity average molecular weight (Mv) is obtained by measuring the viscosity of a methylene chloride solution at 20 ° C. using an Ubbelohde viscometer, determining the intrinsic viscosity [ ⁇ ], and calculating it by the following equation It is.
- the aromatic polycarbonate resin composition of the invention contains a cycloaliphatic epoxy compound (B).
- the alicyclic epoxy compound (B) has an action as an acid scavenger.
- the following problems occur when the aromatic polycarbonate resin composition is exposed to a high temperature environment for a long time or to a high humidity and high temperature environment for a long time.
- An acidic compound is generated under the influence of components derived from each component contained in the aromatic polycarbonate resin composition or components derived from impurities of each component.
- the generated acidic compound deteriorates the color tone of the aromatic polycarbonate resin composition and reduces the transparency. Such an adverse effect can be avoided because the alicyclic epoxy compound (B) captures generated acidic compounds.
- the alicyclic epoxy compound (B) is a cyclic aliphatic compound having an epoxy group by addition of one oxygen atom to an ethylene bond in an aliphatic ring, and more specifically, it is represented by the following formula (1)
- the compounds exemplified in the formula (10) can be used.
- the alicyclic epoxy compound (B) may be used alone or in combination of two or more.
- compounds represented by Formula (1), Formula (7) and Formula (10) are preferable, and in particular 3,4-epoxycyclohexylmethyl-3 ′, 4′-epoxycyclohexanecarboxy (Commercially available, for example, Celoxide 2021 P, trade name of Daicel Chemical Industries, Ltd.), 1,2-epoxy-4- (2-oxiranyl) cyclohexane of 2,2-bis (hydroxymethyl) -1-butanol Additives (as commercial products, for example, trade name EHPE 3150 manufactured by Daicel Chemical Industries, Ltd.), and mixtures of these two (as commercial products, for example, trade name EHPE 3150 CE, manufactured by Daicel Chemical Industries, Ltd.) It is suitable.
- the content of the alicyclic epoxy compound (B) is 0.01 to 0.1 parts by mass, preferably 0.01 to 0.08 parts by mass with respect to 100 parts by mass of the aromatic polycarbonate resin (A). And more preferably 0.02 to 0.05 parts by mass. If the amount is less than 0.01 parts by mass, the YI value of the molded article becomes high when held at high temperature or when held at high humidity, and the color tone of the polycarbonate resin composition decreases. If it is 0.01 parts by mass or more, the YI value of the molded article is low even when held at high temperature or after being held at high humidity, and the color tone of the polycarbonate resin composition becomes excellent. Preferably it is more than 0.02 mass part, More preferably, it is 0.03 mass part or more.
- the content of the alicyclic epoxy compound (B) is preferably 0.1 parts by mass or less, more preferably 0.08 parts by mass or less, and still more preferably 0.05 parts by mass or less.
- a cycloaliphatic epoxy compound (B) relative to 100 parts by mass of the aromatic polycarbonate resin (A) as a range capable of maintaining a particularly excellent color tone even when held at high temperature and also at high humidity It is preferable to set the content of H to 0.03 to 0.08 parts by mass. It is not preferable to produce an optical molded article such as a light guide plate using an aromatic polycarbonate resin composition having a reduced color tone, since this adversely affects the transparency of the molded article.
- the aromatic polycarbonate resin composition of the invention contains a polyether compound (C) having a polyoxyalkylene structure.
- the polyether compound (C) is used to improve the initial color tone upon molding of the aromatic polycarbonate resin composition.
- the polyether compound (C) having the polyoxyalkylene structure preferably has a polyoxyalkylene structure represented by (R C1 O) m and a polyoxyalkylene structure represented by (R C2 O) n .
- R C1 and R C2 each independently represent an alkylene group having 1 or more carbon atoms.
- m + n is 5 or more and less than 300, preferably 10 to 200, more preferably 20 to 100.
- Examples of the alkylene group represented by R C1 and R C2 include methylene group, ethylene group, trimethylene group, propylene group, tetramethylene group, hexamethylene group and the like, and an alkylene group having 1 to 5 carbon atoms is preferable.
- m R C1 O groups a plurality of R C1 may be the same alkylene group as each other, or may be alkylene groups having different carbon numbers.
- the polyoxyalkylene group represented by (R C1 O) m is not limited to one having a single oxyalkylene unit such as a polyoxyethylene group or a polyoxypropylene group as a repeating unit, and an oxyethylene unit and It may have a plurality of oxyalkylene units having different carbon numbers such as an oxypropylene unit as a repeating unit.
- R C2 is also the same as R C1 , and in the n R C2 O groups, a plurality of R C2 may be the same alkylene group as each other, or may be an alkylene group having different carbon numbers.
- R C1 and R C2 are alkylene groups selected from ethylene group, propylene group and tetramethylene group, and at least at least one of R C1 and R C2 One of them is preferably an ethylene group or a propylene group from the viewpoint of improving the initial color tone.
- the polyether compound (C) is a compound (C-1) represented by the following general formula (II), an alkylene oxide adduct of polyhydric alcohol and an ester (C-2) thereof, and a cyclic polyether compound (C-) It is preferably at least one selected from the group consisting of 3).
- R C3 O- (R C1 O) m -A- (R C2 O) n -R C4 (II) (Wherein, R C1 and R C2 each independently represent an alkylene group having a carbon number of 1 or more, and m + n is 5 or more and less than 300.
- R C3 and R C4 each independently represent a hydrogen atom, a carbon number of 1 to 30 hydrocarbon groups, an alkanoyl group having 1 to 30 carbon atoms, an alkenoyl group having 2 to 30 carbon atoms, or a glycidyl group are shown.
- A represents a single bond or a divalent organic group.
- the alkylene group represented by R C1 and R C2 is as described above.
- the polyoxyalkylene structure represented by (R C1 O) m and the polyoxyalkylene structure represented by (R C2 O) n are also as described above.
- the hydrocarbon group having 1 to 30 carbon atoms represented by R C3 and R C4 is an alkyl group having 1 to 30 carbon atoms, an alkenyl group having 2 to 30 carbon atoms, an aryl group having 6 to 30 carbon atoms, or 7 carbon atoms There may be mentioned an aralkyl group of -30.
- the alkyl group and the alkenyl group may be linear, branched or cyclic, and examples thereof include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, various butyl groups, various pentyl groups and various hexyl groups.
- octyl groups cyclopentyl groups, cyclohexyl groups, allyl groups, propenyl groups, various butenyl groups, various hexenyl groups, various octenyl groups, cyclopentenyl groups, cyclohexenyl groups and the like.
- aryl group a phenyl group, a tolyl group, xylyl group etc. are mentioned, for example.
- aralkyl group a benzyl group, a phenethyl group, a methyl benzyl group etc. are mentioned, for example.
- the C 1 -C 30 alkanoyl group represented by R C3 and R C4 may be linear or branched, and may be, for example, methanoyl group, ethanoyl group, n-propanoyl group, isopropanoyl group, n-butanoyl group, tert. And -butanoyl group, n-hexanoyl group, n-octanoyl group, n-decanoyl group, n-dodecanoyl group, benzoyl group and the like. Among them, an alkanoyl group having 1 to 20 carbon atoms is preferable from the viewpoint of compatibility, thermal stability and ease of production.
- the C 2-30 alkenoyl group represented by R C3 and R C4 may be linear or branched, and may be, for example, ethenoyl group, n-propenoyl group, isopropenoyl group, n-butenoyl group, tert-butenoyl group, n And -hexenoyl group, n-octenoyl group, n-decenoyl group, n-dodecenoyl group and the like.
- an alkenoyl group having 2 to 10 carbon atoms is preferable, and an alkenoyl group having 2 to 6 carbon atoms is more preferable, from the viewpoint of achieving low molecular weight, compatibility and solubility, and easiness of production.
- Examples of the divalent organic group represented by A include groups represented by the following formula (a).
- Specific examples of the compound (C-1) represented by the above general formula (II) include polyethylene glycol, polypropylene glycol, polytetramethylene glycol, polyoxytetramethylene polyoxyethylene glycol, polyoxyethylene polyoxypropylene glycol, Polyoxyethylene monomethyl ether, polyoxyethylene dimethyl ether, polyoxyethylene-bisphenol A ether, polyoxypropylene-bisphenol A ether, polyoxyethylene-polyoxypropylene-bisphenol A ether, polyethylene glycol-allyl ether, polyethylene glycol-diallyl ether , Polypropylene glycol-allyl ether, polypropylene glycol-diallyl ether, polyethylene glycol Call - polypropylene glycol - allyl ether, polyethylene glycol dimethacrylate, polypropylene glycol dimethacrylate, polypropylene glycol distearate, and the like.
- polyhydric alcohol in the alkylene oxide adduct of polyhydric alcohol and ester (C-2) thereof examples include glycerin, diglyceryl ether, sorbitol and the like.
- cyclic polyether compound (C-3) examples include 18 crown 6, dibenzo 18 crown 6 and the like.
- the polyether compound (C) it is preferable to use at least one selected from polyethylene glycol, polypropylene glycol, and polyoxyethylene glycol-polyoxypropylene glycol.
- the number average molecular weight of the polyether compound (C) is not particularly limited, but is preferably 200 to 10,000, more preferably 500 to 8,000, and still more preferably 1,000 to 5,000.
- the content of the polyether compound (C) is 0.2 to 0.6 parts by mass, preferably 0.2 to 0.5 parts by mass with respect to 100 parts by mass of the aromatic polycarbonate resin (A). And more preferably 0.3 to 0.5 parts by mass.
- the content of the polyether compound (C) is less than 0.2 parts by mass, the initial YI value of the molded article of the aromatic polycarbonate resin composition decreases.
- the content of the polyether compound (C) exceeds 0.6 parts by mass, the YI of the molded article formed of the aromatic polycarbonate resin composition is maintained at a high temperature or when maintained at a high humidity. The value increases and the color tone decreases. Therefore, in the case of optical molded article applications such as a light guide plate, the transparency is adversely affected, which is not preferable.
- the aromatic polycarbonate resin composition of the invention contains a phosphorus-based compound (D).
- a phosphorus type compound (D) By containing a phosphorus type compound (D), the initial stage YI value of the aromatic polycarbonate resin composition of this invention, a long-term heat resistance, and a long-term high wet heat resistance can be made favorable. Therefore, the color tone of a resin composition becomes favorable and optical molded articles, such as a light-guide plate which has the outstanding transparency, can be obtained.
- a phosphorus compound (D) the well-known phosphorus compound currently used as an antioxidant in polycarbonate resin can be used. By selecting a phosphorus-based compound having a phosphite structure among these known phosphorus-based compounds, it is possible to obtain a molded article having a small change in color tone and excellent in transparency.
- the phosphorus compound having a phosphite structure is a trivalent phosphorus compound represented by the general formula: P (OR d ) 3 , and R d represents a monovalent or divalent organic group.
- a phosphite compound for example, triphenyl phosphite, tris (monononylphenyl) phosphite, tris (monononyl / dinonyl phenyl) phosphite, tris (2,4-di-tert-butylphenyl) phosphite
- Phyto monooctyl diphenyl phosphite, dioctyl monophenyl phosphite, monodecyl diphenyl phosphite, didecyl monophenyl phosphite, tridecyl phosphite, trilauryl phosphite, tristearyl phosphite,
- an aromatic phosphite compound represented by the following formula (2) or (3) can further improve the color tone of the aromatic polycarbonate resin composition of the present invention, More preferable.
- R 1 , R 2 and R 3 may be the same or different, and represent an aryl group having 6 to 30 carbon atoms. ]
- R 4 and R 5 may be the same or different, and represent an aryl group having 6 to 30 carbon atoms.
- the phosphite compound represented by the above formula (2) is preferably triphenyl phosphite, tris (monononylphenyl) phosphite, tris (2,4-di-tert-butylphenyl) phosphite, etc. More preferred is 2,4-di-tert-butylphenyl) phosphite.
- organic phosphite compounds specifically, for example, “ADEKA Stub 1178” manufactured by ADEKA, “SUMILIZER TNP” manufactured by SUMITOMO CHEMICAL, “JP-351” manufactured by Shirokita Chemical Co., Ltd., “ADEKA Stub 2112 manufactured by ADEKA” “AS,“ IRGAFOS 168 ”manufactured by BASF,“ JP-650 ”manufactured by Johoku Chemical Industry Co., Ltd., and the like.
- phosphite compound represented by the above formula (3) bis (2,4-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, bis (2,6-di-tert-butyl- Particularly preferred are those having a pentaerythritol diphosphite structure such as 4-methylphenyl) pentaerythritol diphosphite and bis (2,4-dicumylphenyl) pentaerythritol diphosphite.
- organic phosphite compounds preferably include “Adekastab PEP-24G”, “Adekastab PEP-36” manufactured by ADEKA, “Doverphos S-9228” manufactured by Doverchemical, and the like.
- phosphine compounds such as triphenylphosphine can be used.
- JC263 manufactured by Johoku Chemical Co., Ltd. can be mentioned.
- the phosphorus compounds mentioned above are bis (2,4-dicumylphenyl) pentaerythritol diphosphite, bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, and tris (2) More preferably, it is at least one selected from 2,4-di-tert-butylphenyl) phosphite.
- the phosphorus-based compound may contain one type, or two or more types may be contained in any combination.
- the content of the phosphorus compound (D) is 0.005 to 1 part by mass, preferably 0.01 to 0.5 parts by mass, with respect to 100 parts by mass of the aromatic polycarbonate resin (A). Preferably, it is 0.02 to 0.3 parts by mass. If the amount is less than 0.005 parts by mass, the initial YI value of the molded article decreases, and if it exceeds 1 part by mass, the long-term heat resistance and the long-term heat and humidity resistance decrease, which is not preferable.
- the aromatic polycarbonate resin composition of the present invention may contain various additives as long as the transparency and the color tone are not adversely affected.
- additives include ultraviolet light absorbers, light stabilizers, lubricants, antistatic agents, and flame retardants.
- UV absorbers such as benzophenone type, benzotriazol type, hydroxyphenyl triazine type, cyclic imino ester type and cyanoacrylate type can be used.
- benzophenone-based UV absorbers include 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, 2-hydroxy-4-octoxybenzophenone, 2-hydroxy-4-benzyloxybenzophenone, 2-hydroxy- 4-methoxy-5-sulfoxybenzophenone, 2-hydroxy-4-methoxy-5-sulfoxytrihydridobenzophenone, 2,2'-dihydroxy-4-methoxybenzophenone, 2,2 ', 4,4'-tetrahydroxy Benzophenone, 2,2'-dihydroxy-4,4'-dimethoxybenzophenone, 2,2'-dihydroxy-4,4'-dimethoxy-5-sodium sulfoxybenzophenone, bis (5-benzoyl-4-hydroxy
- benzotriazole-based UV absorbers examples include 2- (2-hydroxy-5-methylphenyl) benzotriazole, 2- (2-hydroxy-5-tert-octylphenyl) benzotriazole, 2- (2- (2-hydroxy-5-tert-octylphenyl) benzotriazole).
- hydroxyphenyl triazine type ultraviolet absorber for example, 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-hexyloxyphenol, 2- (4,6-diphenyl-1) , 3,5-Triazin-2-yl) -5-methyloxyphenol, 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-ethyloxyphenol, 2- (4 , 6-Diphenyl-1,3,5-triazin-2-yl) -5-propyloxyphenol, and 2- (4,6-diphenyl-1,3,5-triazin-2-yl) -5-butyl An oxyphenol etc. are illustrated.
- the phenyl group of the above exemplified compounds such as 2- (4,6-bis (2,4-dimethylphenyl) -1,3,5-triazin-2-yl) -5-hexyloxyphenol is 2,4-dimethyl
- 2- (4,6-bis (2,4-dimethylphenyl) -1,3,5-triazin-2-yl) -5-hexyloxyphenol is 2,4-dimethyl
- a cyclic imino ester type ultraviolet absorber for example, 2,2′-p-phenylenebis (3,1-benzoxazin-4-one), 2,2′-m-phenylenebis (3,1-benzoxazine) And 4-one), and 2,2'-p, p'-diphenylene bis (3,1-benzoxazin-4-one) and the like.
- cyanoacrylate-based UV absorbers examples include 1,3-bis-[(2′-cyano-3 ′, 3′-diphenylacryloyl) oxy] -2,2-bis [(2-cyano-3,3-) Diphenyl acryloyl) oxy] methyl propane, and 1,3-bis-[(2-cyano-3, 3-diphenyl acryloyl) oxy] benzene and the like can be mentioned.
- the ultraviolet absorber is a polymer type ultraviolet absorber having a structure of a monomer compound capable of radical polymerization and copolymerizing such an ultraviolet absorbing monomer with a monomer such as alkyl (meth) acrylate It may be.
- a compound containing a benzotriazole skeleton, a benzophenone skeleton, a triazine skeleton, a cyclic imino ester skeleton, and a cyanoacrylate skeleton in an ester substituent of (meth) acrylic acid ester is preferable. is there.
- a ultraviolet absorber may be used individually by 1 type, and may be used in combination of 2 or more types.
- the UV absorber it is preferable to use a benzophenone-based UV absorber and a benzotriazole-based UV absorber, and the benzophenone-based UV absorber and the benzotriazole-based UV absorber may be used alone or in combination. preferable.
- the various UV absorbers it is particularly preferable to use 2,2′-p, p′-diphenylene bis (3,1-benzoxazin-4-one).
- Examples of the lubricant include compounds selected from the group of compounds such as aliphatic hydrocarbons, polyolefin waxes, higher carboxylic acids, higher carboxylic acid metal salts, fatty acid amides, fatty acid esters, and higher alcohols.
- Examples of aliphatic hydrocarbons include ligroin, paraffin oil, mineral oil, liquid paraffin and the like.
- Examples of polyolefin waxes include paraffin wax, polyethylene wax, polypropylene wax, ethylene / vinyl acetate copolymer wax, and polyolefin ionomer wax.
- higher carboxylic acids examples include stearic acid, valeric acid, caproic acid, capric acid, capric acid, lauric acid, myristic acid, palmitic acid, arachic acid, behenic acid, lignoceric acid, cerotic acid, mellic acid, tetratriacontanic acid, glutar Acid, adipic acid, azelaic acid, naphthenic acid, rosin acid, oleic acid, linoleic acid, linolenic acid and the like can be mentioned.
- higher carboxylic acid metal salts include alkali metal stearates, calcium stearate, zinc stearate, magnesium stearate, lead stearate and the like.
- fatty acid amides examples include stearic acid amide, oleic acid amide, erucic acid amide, ethylenebisstearic acid amide, methylenebisstearic acid amide, ethylenebisoleic acid amide and the like.
- fatty acid esters include esters of higher carboxylic acids such as butyl stearate and monohydric alcohols, ethylene glycol monostearate, glycerin monostearate, trimethylolpropane monostearate, pentaerythritol monostearate, pentaerythritol monolaurate Rate, pentaerythritol distearate, glycerin dilaurate, glycerin tristearate, trimethylolpropane distearate, glycerin distearate, glycerin tribehenate, pentaerythritol tristearate, trimethylolpropane tricaprate, trimethylolpropanedio And esters of higher carboxylic acids such as pentaerythritol tetrastearate with polyhydric alcohols.
- esters of higher carboxylic acids such as pentaerythritol tetrastearate with polyhydr
- the polycarbonate resin composition of the present invention preferably contains glycerin monostearate.
- glycerin monostearate When glycerin monostearate is used, the releasability at the time of molding becomes excellent.
- the content of glycerin monostearate is preferably 0.01 to 0.05 parts by mass with respect to 100 parts by mass of the aromatic polycarbonate resin (A). Even when the thickness of the molded body is 1 mm or more when the content is 0.01 parts by mass or more, the molded body surface can be removed from the mold without cracks or the like.
- it when glycerin monostearate is added, the long-term heat resistance tends to decrease. Therefore, it is preferably 0.05 parts by mass or less, more preferably 0.04 parts by mass or less, and 0.03 parts by mass from the viewpoint of maintaining the color tone even when held for a long time by raising the temperature. It is more preferable that it is the following.
- antistatic agent examples include organic sulfonic acid phosphonium salts such as arylsulfonic acid phosphonium salts and alkylsulfonic acid phosphonium salts represented by dodecylbenzenesulfonic acid phosphonium salts, and boric acid phosphonium salts such as tetrafluoroborate phosphonium salts Can be mentioned.
- organic sulfonate alkalis earths such as lithium organic sulfonate, sodium organic sulfonate, potassium organic sulfonate, cesium organic sulfonate, rubidium organic sulfonate, calcium organic sulfonate, magnesium organic sulfonate and barium organic sulfonate (earths) And the like
- metal salts earths such as lithium organic sulfonate, sodium organic sulfonate, potassium organic sulfonate, cesium organic sulfonate, rubidium organic sulfonate, calcium organic sulfonate, magnesium organic sulfonate and barium organic sulfonate (earths) And the like
- the flame retardant is not particularly limited as long as it does not adversely affect the transparency of the aromatic polycarbonate resin composition of the present invention containing the aromatic polycarbonate resin (A) or the color tone under high temperature and high humidity environment. I will not.
- the flame retardant for example, known materials such as organic metal salt compounds, inorganic silicic acid and silicate compounds thereof, phosphoric acid ester compounds, bromine compounds, triazine compounds, polyorganosiloxane compounds can be used.
- Teflon resin registered trademark
- Teflon resin registered trademark
- the polycarbonate resin composition of the present invention is a molded article having a thickness of 5 mm obtained by molding the aromatic polycarbonate resin composition at 320 ° C., YI value and initial YI after 3000 hours under an environment of 85 ° C. and humidity 85%.
- the difference with the value must be 3.0 or less. That is, it is excellent in long-term moisture and heat resistance. Further details are given in the section of the molded article.
- melt-kneaded and cooled it can be obtained as particles such as pellets.
- Melt-kneading may be carried out by a commonly used method, for example, using a ribbon blender, a Henschel mixer, a Banbury mixer, a drum tumbler, a single screw extruder, a twin screw extruder, a conedader, a multiscrew screw extruder, etc. Can.
- the heating temperature at the time of melt-kneading is appropriately selected usually in the range of about 220 to 300.degree.
- known molding methods such as hollow molding method, injection molding method, injection compression molding method, extrusion molding method, vacuum molding method, blow molding method, press molding method Using a molding method such as pressure molding method, foam molding method, thermal bending method, compression molding method, calendar molding method and rotational molding method to obtain a molded article of the aromatic polycarbonate resin composition of the present invention it can.
- the aromatic polycarbonate resin composition of the present invention is excellent in heat resistance and can withstand molding at a high temperature of about 320 ° C., so a molding method such as an injection molding method in which high fluidity is required for molding materials Preferred.
- the molded product obtained by molding the aromatic polycarbonate resin composition of the present invention can have an initial YI value of 1.1 or less for a molded product having a thickness of 5 mm molded at 320 ° C., and is excellent in transparency and color tone .
- the initial YI value of the molded product having a thickness of 5 mm is 1.2, the difference is only 0.1, but when used as a light guide plate, for example, a large difference occurs as follows. Light may be transmitted through a length of 10 to 15 cm in the light guide plate. For example, even if the difference in thickness of 5 mm is 0.1, if the thickness is as thick as 10 to 15 cm, the transparency and the color tone are greatly affected.
- a molded article having a thickness of 5 mm obtained by molding the aromatic polycarbonate resin composition of the present invention at 320 ° C. has a YI value and an initial YI value after 3000 hours under an environment of 85 ° C. and 85% humidity.
- the color tone change (.DELTA.YI) is as low as 3.0 or less, and it has excellent long-term moisture and heat resistance.
- the ⁇ YI of the molded product of 5 mm in thickness molded at 320 ° C. is preferably 2.9 or less, more preferably 2.8 or less.
- the initial YI value of the molded product having a thickness of 5 mm molded at 320 ° C. is compared to 4.0 or less.
- it can be suitably used as an optical molded article, in particular, an optical molded article such as a light guide plate used in a high temperature and high humidity environment, a lens and the like.
- it is suitably used as a light guide plate and lens for vehicles such as automobiles, railways, and motor bikes used in high temperature and high humidity environments.
- a molded product obtained by molding the aromatic polycarbonate resin composition of the present invention is preferable, particularly in a molded product having a thickness of 1 mm or more, because an excellent effect can be obtained.
- the thickness of the molded body is more preferably 3 mm or more, still more preferably 5 mm or more.
- a molded article having a thickness of 1 mm or more refers to a thickness of a plate-like molded article when the molded article is a flat plate, a corrugated plate, or a plate-like article having irregularities or curves.
- the volume of the molded product divided by the projected area of the injection direction during injection molding to the mold is the average thickness of the molded product.
- the upper limit of the thickness of the molded article having a thickness of 1 mm or more is usually 20 cm or less, preferably 15 cm or less, more preferably 100 mm or less, and still more preferably 70 mm or less.
- the measurement of the initial YI value of a molded product having a thickness of 5 mm was carried out using a spectroaltimeter ("U-4100" manufactured by Hitachi High-Technologies Corporation) for a flat test piece with a thickness of 5 mm, C light source, 2 degrees It is obtained by measuring the YI value under the conditions of the visual field.
- (A2): “TAFLON FN1700” (manufactured by FORMOS A IDEMITSU PETROCHEMICAL CORP., Bisphenol A polycarbonate resin, viscosity average molecular weight (Mv) 17,700)
- Polyether compound having polyoxyalkylene structure (C) (C1): PEG-PPG "Unileub 50 DE-25” (manufactured by NOF Corporation, polyoxyethylene glycol-polyoxypropylene glycol) (C2): PEG-PTMG "Polyserine DC-1100" (manufactured by NOF Corporation, polyoxytetramethylene glycol-polyoxyethylene glycol) (C3): PEG "PEG # 1000” (manufactured by NOF Corporation, polyethylene glycol) (C4): PPG "Uniol D-1000" (manufactured by NOF Corporation, polypropylene glycol)
- D1 “Doverphos S-9228PC” (manufactured by Dover Chemical, bis (2,4-dicumylphenyl) pentaerythritol diphosphite)
- D2 “ADEKA Stub PEP-36” (manufactured by ADEKA Co., Ltd., bis (2,6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite)
- D3 "ADEKA Stub 2112” (manufactured by ADEKA Co., Ltd., tris (2,4-di-tert-butylphenyl) phosphite)
- D4 "JC263” (manufactured by Johoku Chemical Industry Co., Ltd., triphenylphosphine)
- the acceptance criterion is that YI 1 is 1.1 or less.
- cases where YI 1 is 1.1 or less and over 1.0 are indicated as B, cases where 1.0 or less are indicated as A, and cases where 1.1 are exceeded are indicated as X.
- a and B show excellent YI values satisfying the acceptance criteria, and X show YI values not satisfying the acceptance criteria.
- B is given when ⁇ YI (YI 2 -YI 1 ) is 4.0 or less and 3.0 or more, A is given when it is less than 3.0, and X is given when it is greater than 4.0. .
- a and B indicate excellent ⁇ YI meeting the acceptance criteria, and X indicate ⁇ YI not meeting the acceptance criteria.
- cases where ⁇ YI (YI 3 -YI 1 ) is 3.0 or less and 2.0 or more are indicated as B
- cases where ⁇ YI (YI 3 -YI 1 ) is less than 2.0 are indicated as A
- cases where 3.0 is exceeded are indicated as X.
- a and B indicate excellent ⁇ YI meeting the acceptance criteria
- X indicate ⁇ YI not meeting the acceptance criteria.
- the molded product having a thickness of 5 mm obtained by molding the aromatic polycarbonate resin composition of the present invention at 320 ° C. has an initial YI value (YI 1 ) of 1.1 or less and an initial color tone It is shown to be excellent. Also, 120 ° C., YI value after 3000hr and (YI 2), the initial YI value (YI 1) the difference between the ⁇ YI (YI 2 -YI 1) is not less than 4.0, to be excellent in heat resistance It is shown.
- the molded object which consists of an aromatic polycarbonate resin composition of this invention is excellent in the initial stage YI value, long-term heat resistance, and long-term heat-and-moisture resistance after shaping
- the said molded object is suitable as optical molded articles, such as a light guide component for vehicles, and various light guide plates.
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Abstract
Description
特許文献1では、特定量のアリールホスフィン及び特定量の脂環式エポキシ化合物を含有させることにより、長期耐熱性及び長期耐湿熱性を向上させることが開示されている。特許文献2には、芳香族ポリカーボネート樹脂に対して、特定のジホスファイト化合物、脂環式エポキシ化合物を含有させることにより、長期耐熱性に優れ、高温高湿環境下に長時間さらされても、クラックが発生しない導光板等の成形品が得られることが開示されている。特許文献3には、芳香族ポリカーボネート樹脂に対して、アリール基を有するリン系化合物、ポリエーテル化合物を特定量含むことにより、幅広い温度域で成形しても、成形時の劣化による光学特性の低下のないポリカーボネート樹脂組成物が開示されている。
本発明は、初期YI値、長期耐熱性、かつ長期耐湿熱性に優れ、特に厳しい環境下で使用される車載用の導光板、レンズ等の光学部品に好適に用いることのできる芳香族ポリカーボネート樹脂組成物、及びそれから成形された光学部品を提供するものである。
すなわち、本発明は、下記の芳香族ポリカーボネート樹脂組成物及び光学成形品を提供するものである。
前記芳香族ポリカーボネート樹脂組成物を320℃で成形した厚み5mmの成形体の、85℃、湿度85%の環境下で3000時間経過後のYI値と初期YI値との差が3.0以下である、芳香族ポリカーボネート樹脂組成物。
[2]前記芳香族ポリカーボネート樹脂(A)が、主鎖が下記一般式(I)で表される繰り返し単位を有するポリカーボネートである、上記[1]に記載の芳香族ポリカーボネート樹脂組成物。
(式中、RA1及びRA2はそれぞれ独立に、炭素数1~6のアルキル基又は炭素数1~6のアルコキシ基を示し、Xは単結合、炭素数1~8のアルキレン基、炭素数2~8のアルキリデン基、炭素数5~15のシクロアルキレン基、炭素数5~15のシクロアルキリデン基、-S-、-SO-、-SO2-、-O-又は-CO-を示し、a及びbはそれぞれ独立に、0~4の整数を示す。)
[3]前記芳香族ポリカーボネート樹脂(A)の粘度平均分子量が、10,000~50,000である、上記[1]又は[2]に記載の芳香族ポリカーボネート樹脂組成物。
[4]前記脂環式エポキシ化合物(B)が、3,4-エポキシシクロヘキシルメチル-3’,4’-エポキシシクロヘキサンカルボキシレート及び/又は2,2-ビス(ヒドロキシメチル)-1-ブタノールの1,2-エポキシ-4-(2-オキシラニル)シクロヘキサン付加物である、上記[1]~[3]のいずれか1つに記載の芳香族ポリカーボネート樹脂組成物。
[5]前記ポリエーテル化合物(C)が、(RC1O)mで表されるポリオキシアルキレン構造及び(RC2O)nで表されるポリオキシアルキレン構造を含む、上記[1]~[4]のいずれか1つに記載の芳香族ポリカーボネート樹脂組成物。
(式中、RC1及びRC2はそれぞれ独立に、炭素数1以上のアルキレン基を示す。m+nは5以上300未満である。m個のRC1O基において、複数のRC1は互いに同一のアルキレン基でもよく、炭素数の異なるアルキレン基であってもよい。n個のRC2O基において、複数のRC2は互いに同一のアルキレン基でもよく、炭素数の異なるアルキレン基であってもよい。)
[6]前記RC1及びRC2が、エチレン基、プロピレン基、テトラメチレン基から選択されるアルキレン基であり、かつ、RC1及びRC2の少なくとも1つは、エチレン基及びプロピレン基のいずれかである、上記[5]に記載の芳香族ポリカーボネート樹脂組成物。
[7]前記ポリエーテル化合物(C)が、ポリエチレングリコール、ポリプロピレングリコール、及びポリオキシエチレングリコール-ポリオキシプロピレングリコールから選択される少なくとも1種である、上記[1]~[6]のいずれか1つに記載の芳香族ポリカーボネート樹脂組成物。
[8]前記ポリエーテル化合物(C)の数平均分子量が200~10,000である、上記[1]~[7]のいずれか1つに記載の芳香族ポリカーボネート樹脂組成物。
[9]前記リン系化合物(D)が、ホスファイト構造を有するリン系化合物である、上記[1]~[8]のいずれか1つに記載の芳香族ポリカーボネート樹脂組成物。
[10]前記ホスファイト構造を有するリン系化合物が、ビス(2,4-ジクミルフェニル)ペンタエリスリトールジホスファイト、ビス(2,6-ジ-tert-ブチル-4-メチルフェニル)ペンタエリスリトールジホスファイト、及びトリス(2,4-ジ-tert-ブチルフェニル)ホスファイトから選択される少なくとも1種である、上記[9]に記載の芳香族ポリカーボネート樹脂組成物。
[11]320℃で成形した厚み5mmの成形体の初期YI値が1.1以下である、上記[1]~[10]のいずれか1つに記載の芳香族ポリカーボネート樹脂組成物。
[12]320℃で成形した厚み5mmの成形体の、120℃で3000時間経過後のYI値と初期YI値との差が4.0以下である、上記[1]~[11]のいずれか1つに記載の芳香族ポリカーボネート樹脂組成物。
[13]前記芳香族ポリカーボネート樹脂(A)100質量部に対して、脂環式エポキシ化合物(B)0.02~0.05質量部、ポリオキシアルキレン構造を有するポリエーテル化合物(C)0.2~0.5質量部、及びリン系化合物(D)0.02~0.3質量部を含有してなる、上記[1]~[12]のいずれか1つに記載の芳香族ポリカーボネート樹脂組成物。
[14]前記芳香族ポリカーボネート樹脂(A)100質量部に対して、脂環式エポキシ化合物(B)を0.03~0.08質量部含有する、上記[1]~[13]のいずれか1つに記載の芳香族ポリカーボネート樹脂組成物。
[15]前記芳香族ポリカーボネート樹脂(A)100質量部に対して、0.01~0.05質量部のグリセリンモノステアレートをさらに含む、上記[1]~[14]のいずれか1つに記載の芳香族ポリカーボネート樹脂組成物。
[16]上記[1]~[15]のいずれか1つに記載の芳香族ポリカーボネート樹脂組成物を成形してなる光学成形品。
[17]光学成形品が導光板である、上記[16]に記載の光学成形品。
[18]厚さが1~70mmである、上記[16]または[17]に記載の光学成形品。
以下、本発明の芳香族ポリカーボネート樹脂組成物及び光学成形品について詳細に説明する。本明細書において、好ましいとされている規定は任意に採用することができ、好ましいもの同士の組み合わせはより好ましい。
<(A)芳香族ポリカーボネート樹脂>
本発明の芳香族ポリカーボネート樹脂組成物は、芳香族ポリカーボネート樹脂(A)を含有する。芳香族ポリカーボネート樹脂(A)としては、特に制限なく、公知の方法により製造されたものを用いることができる。
例えば、二価フェノールとカーボネート前駆体とを溶液法(界面重縮合法)又は溶融法(エステル交換法)により製造したもの、すなわち、末端停止剤の存在下に、二価フェノールとホスゲンとを反応させる界面重縮合法、又は末端停止剤の存在下に、二価フェノールとジフェニルカーボネート等とのエステル交換法等により反応させて製造されたものを用いることができる。
本発明において成分(A)は、分岐構造を有していてもよい。分岐剤としては、1,1,1-トリス(4-ヒドロキシフェニル)エタン、α,α’,α’’-トリス(4-ヒドロキシフェニル)-1,3,5-トリイソプロピルベンゼン、フロログリシン、トリメリット酸及び1,3-ビス(o-クレゾール)等を挙げることができる。
RA1及びRA2としては、いずれも、好ましくは炭素数1~4のアルキル基又は炭素数1~4のアルコキシ基である。
a及びbは、それぞれ独立に0~4の整数を示し、好ましくは0~2、より好ましくは0又は1である。
本発明において、この粘度平均分子量(Mv)は、ウベローデ型粘度計を用いて、20℃における塩化メチレン溶液の粘度を測定し、これより極限粘度[η]を求め、次式にて算出するものである。
発明の芳香族ポリカーボネート樹脂組成物は、脂環式エポキシ化合物(B)を含有する。脂環式エポキシ化合物(B)は、酸補捉剤としての作用を有する。芳香族ポリカーボネート樹脂組成物が高温環境に長時間暴露されたり、高湿度高温環境に長時間暴露されたりした場合に以下の問題が生じる。芳香族ポリカーボネート樹脂組成物に含まれる各成分由来又は各成分の不純物に由来する成分の影響により酸性化合物が発生する。発生した酸性化合物は芳香族ポリカーボネート樹脂組成物の色調を悪化させ、透明性を低下させる。脂環式エポキシ化合物(B)は発生した酸性化合物を捕捉するため、このような悪影響を回避することができる。本発明において、脂環式エポキシ化合物(B)とは、脂肪族環内のエチレン結合に酸素1原子が付加しエポキシ基を有する環状脂肪族化合物をいい、具体的には下記式(1)~式(10)で例示した化合物を用いることができる。脂環式エポキシ化合物(B)は、一種を単独で用いてもよく、二種以上を組み合わせて用いてもよい。
発明の芳香族ポリカーボネート樹脂組成物は、ポリオキシアルキレン構造を有するポリエーテル化合物(C)を含有する。ポリエーテル化合物(C)は、芳香族ポリカーボネート樹脂組成物の成形時の初期色調を改善するために用いられる。当該ポリオキシアルキレン構造を有するポリエーテル化合物(C)は、(RC1O)mで表されるポリオキシアルキレン構造及び(RC2O)nで表されるポリオキシアルキレン構造を有することが好ましい。ここで、RC1及びRC2はそれぞれ独立に、炭素数1以上のアルキレン基を示す。m+nは5以上300未満であり、好ましくは10~200、より好ましくは20~100である。
m個のRC1O基において、複数のRC1は互いに同一のアルキレン基でもよく、炭素数の異なるアルキレン基であってもよい。すなわち、(RC1O)mで表されるポリオキシアルキレン基は、ポリオキシエチレン基やポリオキシプロピレン基等の単一のオキシアルキレン単位を繰り返し単位として有するものに限定されず、オキシエチレン単位及びオキシプロピレン単位など炭素数の異なる複数のオキシアルキレン単位を繰り返し単位として有するものであってもよい。
RC2もRC1と同様であり、n個のRC2O基において、複数のRC2は互いに同一のアルキレン基でもよく、炭素数の異なるアルキレン基であってもよい。
上記RC1及びRC2で示されるアルキレン基の中でも、特に、RC1及びRC2が、エチレン基、プロピレン基、テトラメチレン基から選択されたアルキレン基であり、かつ、RC1及びRC2の少なくとも1つは、エチレン基又はプロピレン基のいずれかであることが、初期色調を改善する観点から好ましい。
RC3O-(RC1O)m-A-(RC2O)n-RC4 (II)
(式中、RC1及びRC2はそれぞれ独立に、炭素数1以上のアルキレン基を示す。m+nは5以上300未満である。RC3及びRC4はそれぞれ独立に、水素原子、炭素数1~30の炭化水素基、炭素数1~30のアルカノイル基、炭素数2~30のアルケノイル基、又はグリシジル基を示す。Aは、単結合又は2価の有機基を示す。)
アルキル基及びアルケニル基は、直鎖状、分岐状、環状のいずれであってもよく、例えば、メチル基、エチル基、n-プロピル基、イソプロピル基、各種ブチル基、各種ペンチル基、各種ヘキシル基、各種オクチル基、シクロペンチル基、シクロヘキシル基、アリル基、プロペニル基、各種ブテニル基、各種ヘキセニル基、各種オクテニル基、シクロペンテニル基、シクロヘキセニル基等が挙げられる。アリール基としては、例えばフェニル基、トリル基、キシリル基等が挙げられる。アラルキル基としては、例えばベンジル基、フェネチル基、メチルベンジル基等が挙げられる。
RC3及びRC4で示される炭素数2~30のアルケノイル基は直鎖状でも分岐鎖状でもよく、例えばエテノイル基、n-プロペノイル基、イソプロペノイル基、n-ブテノイル基、tert-ブテノイル基、n-ヘキセノイル基、n-オクテノイル基、n-デセノイル基、n-ドデセノイル基等が挙げられる。中でも、低分子量とする観点、相溶性や溶解性の観点及び製造容易性の観点から、炭素数2~10のアルケノイル基が好ましく、炭素数2~6のアルケノイル基がより好ましい。
環状ポリエーテル化合物(C-3)の具体例としては、18クラウン6、ジベンゾ18クラウン6等が挙げられる。
前記ポリエーテル化合物(C)としては、ポリエチレングリコール、ポリプロピレングリコール、及びポリオキシエチレングリコール-ポリオキシプロピレングリコールから選択された少なくとも1種を用いることが好ましい。
発明の芳香族ポリカーボネート樹脂組成物は、リン系化合物(D)を含有する。リン系化合物(D)を含有することで、本発明の芳香族ポリカーボネート樹脂組成物の初期YI値、長期耐熱性及び長期高湿熱性を良好なものとすることができる。そのため、樹脂組成物の色調が良好となり、優れた透明性を有する導光板等の光学成形品を得ることができる。
リン系化合物(D)としては、ポリカーボネート樹脂に酸化防止剤として使用されている公知のリン系化合物を用いることができる。これらの公知のリン系化合物の中でも、ホスファイト構造を有するリン系化合物を選択することで、色調の変化が少なく、透明性に優れた成形品を得ることができる。
このようなホスファイト化合物としては、例えば、トリフェニルホスファイト、トリス(モノノニルフェニル)ホスファイト、トリス(モノノニル/ジノニル・フェニル)ホスファイト、トリス(2,4-ジ-tert-ブチルフェニル)ホスファイト、モノオクチルジフェニルホスファイト、ジオクチルモノフェニルホスファイト、モノデシルジフェニルホスファイト、ジデシルモノフェニルホスファイト、トリデシルホスファイト、トリラウリルホスファイト、トリステアリルホスファイト、ジステアリルペンタエリスリトールジホスファイト、ビス(2,4-ジ-tert-ブチル-4-メチルフェニル)ペンタエリスリトールホスファイト、ビス(2,6-ジ-tert-ブチルフェニル)オクチルホスファイト、2,2-メチレンビス(4,6-ジ-tert-ブチルフェニル)オクチルホスファイト、テトラキス(2,4-ジ-tert-ブチルフェニル)-4,4’-ビフェニレン-ジホスファイト、6-[3-(3-tert-ブチル-ヒドロキシ-5-メチルフェニル)プロポキシ]-2,4,8,10-テトラ-tert-ブチルジベンゾ[d,f][1,3,2]-ジオキサホスフェピン等が挙げられる。
その他リン系化合物としては、ホスフィン化合物、例えばトリフェニルホスフィンを用いることができる。具体的には、城北化学株式会社製の「JC263」を挙げることができる。
上述したリン系化合物が、ビス(2,4-ジクミルフェニル)ペンタエリスリトールジホスファイト、ビス(2,6-ジ-tert-ブチル-4-メチルフェニル)ペンタエリスリトールジホスファイト、及びトリス(2,4-ジ-tert-ブチルフェニル)ホスファイトから選択される少なくとも1種であることがさらに好ましい。
リン系化合物は、1種が含有されていてもよく、2種以上が任意の組み合わせで含有されていても良い。
本発明の芳香族ポリカーボネート樹脂組成物には、上述の成分(A)~(D)の他に、透明性や色調に悪影響を与えない範囲で、各種の添加剤を含有させることができる。これらの添加剤として、例えば、紫外線吸収剤、光安定剤、滑剤、帯電防止剤、難燃剤等を挙げることができる。
シアノアクリレート系紫外線吸収剤としては、例えば1,3-ビス-[(2’-シアノ-3’,3’-ジフェニルアクリロイル)オキシ]-2,2-ビス[(2-シアノ-3,3-ジフェニルアクリロイル)オキシ]メチルプロパン、および1,3-ビス-[(2-シアノ-3,3-ジフェニルアクリロイル)オキシ]ベンゼンなどを挙げることができる。
上記各種の紫外線吸収剤の中でも、2,2’-p,p’-ジフェニレンビス(3,1-ベンゾオキサジン-4-オン)が用いることが特に好ましい。
特に、本発明のポリカーボネート樹脂組成物は、グリセリンモノステアレートを含むことが好ましい。グリセリンモノステアレートを用いると成形時の離型性に優れたものとなる。グリセリンモノステアレートの含有量は、芳香族ポリカーボネート樹脂(A)100質量部に対して、0.01~0.05質量部であることが好ましい。含有量が0.01質量部以上であると成形体の厚みが1mm以上である場合でも、成形体表面にクラック等が入ることなく金型から外すことができる。一方で、グリセリンモノステアレートを添加した場合、長期耐熱性は低下する傾向がある。よって高温化で長時間保持された際にも色調を維持するとの観点から、0.05質量部以下であることが好ましく、0.04質量部以下であることがより好ましく、0.03質量部以下であることがさらに好ましい。
本発明のポリカーボネート系樹脂組成物は、該芳香族ポリカーボネート樹脂組成物を320℃で成形した厚み5mmの成形体の、85℃、湿度85%の環境下で3000時間経過後のYI値と初期YI値との差が3.0以下であることを要する。すなわち、長期耐湿熱性に優れる。成形品の部分でさらに詳述する。
本発明の芳香族ポリカーボネート樹脂組成物は、前記芳香族ポリカーボネート樹脂(A)に対して、所定量の前記(B)~(D)の各成分と、必要に応じて配合される各種の添加剤を配合し、溶融混練して冷却した後、ペレット等の粒子として得ることができる。溶融混練は、通常用いられている方法、例えば、リボンブレンダー、ヘンシェルミキサー、バンバリーミキサー、ドラムタンブラー、単軸スクリュー押出機、二軸スクリュー押出機、コニーダ、多軸スクリュー押出機等を用いて行うことができる。溶融混練に際しての加熱温度は、通常220~300℃程度の範囲で適宜選定される。
本発明の芳香族ポリカーボネート樹脂組成物は、耐熱性に優れており、320℃程度の高温での成形にも耐え得ることから、射出成形法など、成形材料に高い流動性が要求される成形法に好適である。一方、押出成形法を採用すると、220~280℃程度の低温で成形するために、より透明性が高く、黄変のない、高い光学特性のシート又はフィルム等の光学成形品を得ることができる。
本発明の芳香族ポリカーボネート樹脂組成物を成形して得られる成形体は、320℃で成形した厚み5mmの成形体の初期YI値が1.1以下とすることができ、透明性及び色調に優れる。厚み5mmの成形体の初期YI値1.2となると、その差は僅か0.1であるが、例えば導光板として用いた際に以下のように大きな差を生じる。光は導光板内の10~15cmの長さを透過することがある。例え、厚み5mmにおける差が0.1であっても、厚みが10~15cmと厚くなれば、透明性及び色調に大きな影響を及ぼす。上述した通り、本発明の芳香族ポリカーボネート樹脂組成物を320℃で成形した厚み5mmの成形体は、85℃、湿度85%の環境下で3000時間経過した後のYI値と、初期YI値とを比較した色調変化(ΔYI)が3.0以下と低く、長期耐湿熱性に優れる特性を有する。該320℃で成形した厚み5mmの成形体の、上記ΔYIは好ましくは2.9以下であり、より好ましくは2.8以下である。
また、320℃で成形した厚み5mmの成形体の、120℃で3000時間経過した後のYI値と、初期YI値とを比較した色調変化(ΔYI)を4.0以下に抑えることができる。このような特性を活かして、光学成形品、特に、高温、高湿環境で使用される導光板、レンズ等の光学成形品として好適に使用することができる。さらに高温、高湿環境で使用される自動車、鉄道、原動機付自転車等の車両用の導光板、レンズとして好適に用いられる。
本発明の芳香族ポリカーボネート樹脂組成物を成形して得られる成形体は、特に厚み1mm以上の成形体において、優れた効果を得ることができるため好ましい。成形体の厚みはより好ましくは3mm以上であり、さらに好ましくは5mm以上である。
本発明において、「厚みが1mm以上を有する成形品」とは、成形品が平板状、波板状、あるいは凹凸や湾曲等を有する板状成形品である場合は、その板状成形品の厚みを示し、成形品が板状でない、例えば丸棒状や複雑な形状を有する場合、成形品の体積を射出成形時の射出方向の金型への投影面積で割った値を成形品の平均の厚みを示す。厚みが1mm以上を有する成形品の厚みの上限値は、通常20cm以下、好ましくは15cm以下、さらに好ましくは100mm以下、さらにより好ましくは70mm以下である。
(A1):「タフロン FN1500」(FORMOSA IDEMITSU PETROCHEMICAL CORP.製、ビスフェノールAポリカーボネート樹脂、粘度平均分子量(Mv)=14,200)
(A2):「タフロン FN1700」(FORMOSA IDEMITSU PETROCHEMICAL CORP.製、ビスフェノールAポリカーボネート樹脂、粘度平均分子量(Mv)=17,700)
(A3):「タフロン FN1200」(FORMOSA IDEMITSU PETROCHEMICAL CORP.製、ビスフェノールAポリカーボネート樹脂、粘度平均分子量(Mv)=11,500)
(B1):「セロキサイド2021P」(ダイセル化学工業(株)製、3,4-エポキシシクロヘキシルメチル-3’,4’-エポキシシクロヘキサンカルボキシレート)
(C1):PEG-PPG「ユニルーブ 50DE-25」(日油(株)製、ポリオキシエチレングリコール-ポリオキシプロピレングリコール)
(C2):PEG-PTMG「ポリセリン DC-1100」(日油(株)製、ポリオキシテトラメチレングリコール-ポリオキシエチレングリコール)
(C3):PEG「PEG#1000」(日油(株)製、ポリエチレングリコール)
(C4):PPG「ユニオール D-1000」(日油(株)製、ポリプロピレングリコール)
(D1):「Doverphos S-9228PC」(Dover Chemical社製、ビス(2,4-ジクミルフェニル)ペンタエリスリトールジホスファイト)
(D2):「アデカスタブ PEP-36」((株)ADEKA製、ビス(2,6-ジ-tert-ブチル-4-メチルフェニル)ペンタエリスリトールジホスファイト)
(D3):「アデカスタブ 2112」((株)ADEKA製、トリス(2,4-ジ-tert-ブチルフェニル)ホスファイト)
(D4):「JC263」(城北化学工業(株)製、トリフェニルホスフィン)
グリセリンモノステアレート:(理研ビタミン(株)製、リケマール S-100A)
表1又は表2に示す割合で各成分を混合し後、スクリュー径40mmのベント付単軸押出機(田辺プラスチックス機械(株)製「VS-40」)を使用して、シリンダー温度250℃で溶融混練し、ストランドカットによりペレットを得た。得られたペレットを110℃で5時間乾燥した後、下記方法で成形体の作製及び各種評価を行った。
上記乾燥後のペレットを、射出成形機(日精樹脂工業(株)社製「ES1000」)を用いて、射出成形法により、シリンダー温度320℃、金型温度80℃、サイクル時間50秒にて、50mm×90mm×厚さ5mmの平板状試験片(成形体(1))を成形した。
得られた試験片について、分光光度計((株)日立ハイテクノロジーズ製「U-4100」)を用い、C光源、2度視野の条件でYI値(初期YI値:YI1)を測定した。結果を表1及び2に示す。合格基準は、YI1が1.1以下である。評価として、YI1が1.1以下であり1.0超である場合をB、1.0以下である場合をA、1.1を超えた場合をXとして示した。A及びBは合格基準を満たす優れたYI値であることを示し、Xは合格基準を満たさないYI値であることを示す。
YI1測定後の上記平板状試験片を、温度120℃に調整したギアーオーブン(TABAI社製「GPS-222」)内に3,000時間入れた。試験後の試験片について上記と同様にYI値(YI2)を測定し、ΔYI(YI2-YI1)を求めた。結果を表1及び2に示す。耐熱試験の合格基準は、ΔYI(YI2-YI1)が4.0以下である。評価として、ΔYI(YI2-YI1)が4.0以下であり3.0以上である場合をB、3.0未満である場合をA、4.0を超えた場合をXとして示した。A及びBは合格基準を満たす優れたΔYIであることを示し、Xは合格基準を満たさないΔYIであることを示す。
YI1測定後の上記平板状試験片を温度85℃、相対湿度85%に設定した恒温恒湿槽(ナガノサイエンス(株)社製「LH33-12P」)に3,000時間入れた。試験後の試験片について上記と同様にYI値(YI3)を測定し、ΔYI(YI3-YI1)を求めた。結果を表1及び2に示す。耐湿熱試験の合格基準は、ΔYI(YI3-YI1)が3.0以下である。評価として、ΔYI(YI3-YI1)が3.0以下であり2.0以上ある場合をB、2.0未満である場合をA、3.0を超えた場合をXとして示した。A及びBは合格基準を満たす優れたΔYIであることを示し、Xは合格基準を満たさないΔYIであることを示す。
Claims (18)
- 芳香族ポリカーボネート樹脂(A)100質量部に対して、脂環式エポキシ化合物(B)0.01~0.1質量部、ポリオキシアルキレン構造を有するポリエーテル化合物(C)0.2~0.6質量部、及びリン系化合物(D)0.005~1質量部を含有してなる、芳香族ポリカーボネート樹脂組成物であって、
前記芳香族ポリカーボネート樹脂組成物を320℃で成形した厚み5mmの成形体の、85℃、湿度85%の環境下で3000時間経過後のYI値と初期YI値との差が3.0以下である、芳香族ポリカーボネート樹脂組成物。 - 前記芳香族ポリカーボネート樹脂(A)の粘度平均分子量が、10,000~50,000である、請求項1又は2に記載の芳香族ポリカーボネート樹脂組成物。
- 前記脂環式エポキシ化合物(B)が、3,4-エポキシシクロヘキシルメチル-3’,4’-エポキシシクロヘキサンカルボキシレート及び/又は2,2-ビス(ヒドロキシメチル)-1-ブタノールの1,2-エポキシ-4-(2-オキシラニル)シクロヘキサン付加物である、請求項1~3のいずれか一項に記載の芳香族ポリカーボネート樹脂組成物。
- 前記ポリエーテル化合物(C)が、(RC1O)mで表されるポリオキシアルキレン構造及び(RC2O)nで表されるポリオキシアルキレン構造を含む、請求項1~4のいずれか一項に記載の芳香族ポリカーボネート樹脂組成物。
(式中、RC1及びRC2はそれぞれ独立に、炭素数1以上のアルキレン基を示す。m+nは5以上300未満である。m個のRC1O基において、複数のRC1は互いに同一のアルキレン基でもよく、炭素数の異なるアルキレン基であってもよい。n個のRC2O基において、複数のRC2は互いに同一のアルキレン基でもよく、炭素数の異なるアルキレン基であってもよい。) - 前記RC1及びRC2が、エチレン基、プロピレン基、テトラメチレン基から選択されるアルキレン基であり、かつ、RC1及びRC2の少なくとも1つは、エチレン基及びプロピレン基のいずれかである、請求項5に記載の芳香族ポリカーボネート樹脂組成物。
- 前記ポリエーテル化合物(C)が、ポリエチレングリコール、ポリプロピレングリコール、及びポリオキシエチレングリコール-ポリオキシプロピレングリコールから選択される少なくとも1種である、請求項1~6のいずれか一項に記載の芳香族ポリカーボネート樹脂組成物。
- 前記ポリエーテル化合物(C)の数平均分子量が200~10,000である、請求項1~7のいずれか一項に記載の芳香族ポリカーボネート樹脂組成物。
- 前記リン系化合物(D)が、ホスファイト構造を有するリン系化合物である、請求項1~8のいずれか一項に記載の芳香族ポリカーボネート樹脂組成物。
- 前記ホスファイト構造を有するリン系化合物が、ビス(2,4-ジクミルフェニル)ペンタエリスリトールジホスファイト、ビス(2,6-ジ-tert-ブチル-4-メチルフェニル)ペンタエリスリトールジホスファイト、及びトリス(2,4-ジ-tert-ブチルフェニル)ホスファイトから選択される少なくとも1種である、請求項9に記載の芳香族ポリカーボネート樹脂組成物。
- 320℃で成形した厚み5mmの成形体の初期YI値が1.1以下である、請求項1~10のいずれか一項に記載の芳香族ポリカーボネート樹脂組成物。
- 320℃で成形した厚み5mmの成形体の、120℃で3000時間経過後のYI値と初期YI値との差が4.0以下である、請求項1~11のいずれか一項に記載の芳香族ポリカーボネート樹脂組成物。
- 前記芳香族ポリカーボネート樹脂(A)100質量部に対して、脂環式エポキシ化合物(B)0.02~0.05質量部、ポリオキシアルキレン構造を有するポリエーテル化合物(C)0.2~0.5質量部、及びリン系化合物(D)0.02~0.3質量部を含有してなる、請求項1~12のいずれか一項に記載の芳香族ポリカーボネート樹脂組成物。
- 前記芳香族ポリカーボネート樹脂(A)100質量部に対して、脂環式エポキシ化合物(B)を0.03~0.08質量部含有する、請求項1~13のいずれか一項に記載の芳香族ポリカーボネート樹脂組成物。
- 前記芳香族ポリカーボネート樹脂(A)100質量部に対して、0.01~0.05質量部のグリセリンモノステアレートをさらに含む、請求項1~14のいずれか一項に記載の芳香族ポリカーボネート樹脂組成物。
- 請求項1~15のいずれか一項に記載の芳香族ポリカーボネート樹脂組成物を成形してなる光学成形品。
- 光学成形品が導光板である、請求項16に記載の光学成形品。
- 厚さが1~70mmである、請求項16または17に記載の光学成形品。
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