JP6670236B2 - 光学用樹脂組成物およびフィルム - Google Patents
光学用樹脂組成物およびフィルム Download PDFInfo
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- JP6670236B2 JP6670236B2 JP2016531104A JP2016531104A JP6670236B2 JP 6670236 B2 JP6670236 B2 JP 6670236B2 JP 2016531104 A JP2016531104 A JP 2016531104A JP 2016531104 A JP2016531104 A JP 2016531104A JP 6670236 B2 JP6670236 B2 JP 6670236B2
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- acrylate
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- 239000004925 Acrylic resin Substances 0.000 claims description 50
- 229920000178 Acrylic resin Polymers 0.000 claims description 50
- 239000002245 particle Substances 0.000 claims description 23
- 230000009477 glass transition Effects 0.000 claims description 21
- 125000000217 alkyl group Chemical group 0.000 claims description 13
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- 125000005250 alkyl acrylate group Chemical group 0.000 claims description 11
- 125000004432 carbon atom Chemical group C* 0.000 claims description 11
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- XFCMNSHQOZQILR-UHFFFAOYSA-N 2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOC(=O)C(C)=C XFCMNSHQOZQILR-UHFFFAOYSA-N 0.000 description 12
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- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 11
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 11
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- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 7
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 6
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 6
- INQDDHNZXOAFFD-UHFFFAOYSA-N 2-[2-(2-prop-2-enoyloxyethoxy)ethoxy]ethyl prop-2-enoate Chemical compound C=CC(=O)OCCOCCOCCOC(=O)C=C INQDDHNZXOAFFD-UHFFFAOYSA-N 0.000 description 6
- SOGAXMICEFXMKE-UHFFFAOYSA-N Butylmethacrylate Chemical compound CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 6
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 6
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 6
- 230000006870 function Effects 0.000 description 6
- 238000003475 lamination Methods 0.000 description 6
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
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- GOXQRTZXKQZDDN-UHFFFAOYSA-N 2-Ethylhexyl acrylate Chemical compound CCCCC(CC)COC(=O)C=C GOXQRTZXKQZDDN-UHFFFAOYSA-N 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 5
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical class ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 5
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 5
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000011790 ferrous sulphate Substances 0.000 description 5
- 235000003891 ferrous sulphate Nutrition 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 5
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 5
- 238000010030 laminating Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 5
- 230000000379 polymerizing effect Effects 0.000 description 5
- XWGJFPHUCFXLBL-UHFFFAOYSA-M rongalite Chemical compound [Na+].OCS([O-])=O XWGJFPHUCFXLBL-UHFFFAOYSA-M 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
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- BJELTSYBAHKXRW-UHFFFAOYSA-N 2,4,6-triallyloxy-1,3,5-triazine Chemical class C=CCOC1=NC(OCC=C)=NC(OCC=C)=N1 BJELTSYBAHKXRW-UHFFFAOYSA-N 0.000 description 4
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 4
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Chemical compound OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 4
- 239000004641 Diallyl-phthalate Chemical class 0.000 description 4
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 4
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 4
- 125000002339 acetoacetyl group Chemical group O=C([*])C([H])([H])C(=O)C([H])([H])[H] 0.000 description 4
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 4
- 125000005396 acrylic acid ester group Chemical group 0.000 description 4
- 229920000800 acrylic rubber Polymers 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- XYLMUPLGERFSHI-UHFFFAOYSA-N alpha-Methylstyrene Chemical compound CC(=C)C1=CC=CC=C1 XYLMUPLGERFSHI-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical class C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 4
- INLLPKCGLOXCIV-UHFFFAOYSA-N bromoethene Chemical compound BrC=C INLLPKCGLOXCIV-UHFFFAOYSA-N 0.000 description 4
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- 230000006866 deterioration Effects 0.000 description 4
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- 238000007720 emulsion polymerization reaction Methods 0.000 description 4
- 125000002768 hydroxyalkyl group Chemical group 0.000 description 4
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 4
- ANISOHQJBAQUQP-UHFFFAOYSA-N octyl prop-2-enoate Chemical compound CCCCCCCCOC(=O)C=C ANISOHQJBAQUQP-UHFFFAOYSA-N 0.000 description 4
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- 230000000704 physical effect Effects 0.000 description 4
- 229920000058 polyacrylate Polymers 0.000 description 4
- FBCQUCJYYPMKRO-UHFFFAOYSA-N prop-2-enyl 2-methylprop-2-enoate Chemical class CC(=C)C(=O)OCC=C FBCQUCJYYPMKRO-UHFFFAOYSA-N 0.000 description 4
- HJWLCRVIBGQPNF-UHFFFAOYSA-N prop-2-enylbenzene Chemical compound C=CCC1=CC=CC=C1 HJWLCRVIBGQPNF-UHFFFAOYSA-N 0.000 description 4
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 3
- UDRXWBKHYRRIHK-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene 2-prop-2-enoyloxyethyl prop-2-enoate Chemical compound C=Cc1ccccc1C=C.C=CC(=O)OCCOC(=O)C=C UDRXWBKHYRRIHK-UHFFFAOYSA-N 0.000 description 3
- YLQPPAFWBWFABJ-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;2-(2-methylprop-2-enoyloxy)ethyl 2-methylprop-2-enoate Chemical compound C=CC1=CC=CC=C1C=C.CC(=C)C(=O)OCCOC(=O)C(C)=C YLQPPAFWBWFABJ-UHFFFAOYSA-N 0.000 description 3
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 3
- PQUXFUBNSYCQAL-UHFFFAOYSA-N 1-(2,3-difluorophenyl)ethanone Chemical compound CC(=O)C1=CC=CC(F)=C1F PQUXFUBNSYCQAL-UHFFFAOYSA-N 0.000 description 3
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 3
- DPBJAVGHACCNRL-UHFFFAOYSA-N 2-(dimethylamino)ethyl prop-2-enoate Chemical compound CN(C)CCOC(=O)C=C DPBJAVGHACCNRL-UHFFFAOYSA-N 0.000 description 3
- HWSSEYVMGDIFMH-UHFFFAOYSA-N 2-[2-[2-(2-methylprop-2-enoyloxy)ethoxy]ethoxy]ethyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCOCCOCCOC(=O)C(C)=C HWSSEYVMGDIFMH-UHFFFAOYSA-N 0.000 description 3
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- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 3
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- AOJOEFVRHOZDFN-UHFFFAOYSA-N benzyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCC1=CC=CC=C1 AOJOEFVRHOZDFN-UHFFFAOYSA-N 0.000 description 3
- JZQAAQZDDMEFGZ-UHFFFAOYSA-N bis(ethenyl) hexanedioate Chemical compound C=COC(=O)CCCCC(=O)OC=C JZQAAQZDDMEFGZ-UHFFFAOYSA-N 0.000 description 3
- ZPOLOEWJWXZUSP-WAYWQWQTSA-N bis(prop-2-enyl) (z)-but-2-enedioate Chemical compound C=CCOC(=O)\C=C/C(=O)OCC=C ZPOLOEWJWXZUSP-WAYWQWQTSA-N 0.000 description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 3
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- OAKHANKSRIPFCE-UHFFFAOYSA-L calcium;2-methylprop-2-enoate Chemical compound [Ca+2].CC(=C)C([O-])=O.CC(=C)C([O-])=O OAKHANKSRIPFCE-UHFFFAOYSA-L 0.000 description 3
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- 239000008367 deionised water Substances 0.000 description 3
- 229910021641 deionized water Inorganic materials 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- GFJVXXWOPWLRNU-UHFFFAOYSA-N ethenyl formate Chemical compound C=COC=O GFJVXXWOPWLRNU-UHFFFAOYSA-N 0.000 description 3
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- 229910052943 magnesium sulfate Inorganic materials 0.000 description 3
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- 238000000926 separation method Methods 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 1
- 238000000807 solvent casting Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- CWERGRDVMFNCDR-UHFFFAOYSA-N thioglycolic acid Chemical class OC(=O)CS CWERGRDVMFNCDR-UHFFFAOYSA-N 0.000 description 1
- 239000013008 thixotropic agent Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000009816 wet lamination Methods 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 238000004383 yellowing Methods 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
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F265/00—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00
- C08F265/04—Macromolecular compounds obtained by polymerising monomers on to polymers of unsaturated monocarboxylic acids or derivatives thereof as defined in group C08F20/00 on to polymers of esters
- C08F265/06—Polymerisation of acrylate or methacrylate esters on to polymers thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F285/00—Macromolecular compounds obtained by polymerising monomers on to preformed graft polymers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
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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
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/04—Homopolymers or copolymers of esters
- C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
- C08L33/08—Homopolymers or copolymers of acrylic acid esters
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
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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
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
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- C08L2203/00—Applications
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- Laminated Bodies (AREA)
Description
アクリル系樹脂は、熱可塑性アクリル樹脂である限り特に限定されない。アクリル系樹脂とは、一般に(メタ)アクリル酸エステル単位および/または(メタ)アクリル酸単位を有する樹脂のことであり、(メタ)アクリル酸エステルまたは(メタ)アクリル酸の誘導体に由来する構成単位を有していてもよい。なお、本願において「(メタ)アクリル」とは、「メタクリルまたはアクリル」を指すものとする。アクリル系樹脂が有する全構成単位における、(メタ)アクリル酸エステル単位、(メタ)アクリル酸単位および上記誘導体に由来する構成単位の割合の合計は、通常50重量%以上であり、好ましくは60重量%以上、より好ましくは70重量%以上である。
(メタ)アクリル系多層構造グラフト共重合体は、アクリル系樹脂とアクリル系樹脂、またはアクリル系樹脂とアクリル系樹脂以外の樹脂とをグラフト重合反応させることによりできた重合体をいう。グラフト重合反応を2回以上行う場合は、多段重合によることが好ましい。
(メタ)アクリル系多層構造グラフト共重合体の最内層は、メタクリル酸エステルを主要モノマーとする重合体からなることが好ましい。本明細書において「主要モノマー」とは、重合体の構成単位全体のうち、50重量%以上を占めるモノマーをいう。
(メタ)アクリル系多層構造グラフト共重合体の中間層は、アルキル基の炭素数が4〜12のアクリル酸アルキルエステルを主要モノマーとする重合体からなることが好ましい。
(メタ)アクリル系多層構造グラフト共重合体の最外層は、メタクリル酸エステルを主要モノマーとする重合体からなることが好ましい。
また、本発明における(メタ)アクリル系多層構造グラフト共重合体の製造には、公知の重合開始剤を用いることができる。重合開始剤としては例えば、過硫酸カリウム、過硫酸アンモニウム、過硫酸アンモニウム等の過硫酸塩、過リン酸ナトリウム等の過リン酸塩、アゾビスイソブチロニトリル等の有機アゾ化合物、クメンハイドロパーオキサイド、ターシャリーブチルハイドロパーオキサイド、1,1ジメチル−2ヒドロキシエチルハイドロパーオキサイド、パラメンタンハイドロパーオキサイド等のハイドロパーオキサイド化合物、ターシャリーブチルイソプロピルオキシカーボネート、ターシャリーブチルパーオキシブチレート等のパーオキシエステル、パーオキシカーボネート類、ベンゾイルパーオキサイド、ジブチルパーオキサイド、ラウリルパーオキサイド等の有機パーオキシアシレート化合物などが挙げられるが、これに限定されるものではない。これらは熱分解型重合開始剤として使用してもよく、硫酸第一鉄などの触媒及びアスコルビン酸、ソジウムホルムアルデヒドスルホキシレート等の水溶性還元剤の存在下にレドックス型重合開始剤として使用しても良く、重合するべき単量体組成、層構造、重合温度条件等に応じて適宜選定すれば良い。
光学用樹脂組成物において、アクリル系樹脂と(メタ)アクリル系多層構造グラフト共重合体の合計を100重量%とした場合、アクリル系樹脂は、99〜50重量%含まれるよう配合されることが好ましい。
光学用樹脂組成物は、粒状のままで、または押出機によりペレット状としたのち、加熱しながら押出成形や射出成形、圧縮成形、ブロー成形、紡糸成形等により、用途に適した形状の成形品とすることができる。特にフィルムとして有用であり、例えば、通常の溶融押出法であるインフレーション法やTダイ押出法、あるいはカレンダー法、更には溶剤キャスト法等により良好に加工される。中でも、溶剤を使用しない溶融押出法を用いることが好ましい。溶融押出法によれば、製造コストや溶剤による地球環境や作業環境への負荷を低減することができる。
必要に応じて、フィルムを成形する際、フィルム両面をロールまたは金属ベルトに同時に接触させる(挟み込む)ことにより、特にガラス転移温度付近の温度に加熱したロールまたは金属ベルトに同時に接触させることにより、表面性のより優れたフィルムを得ることも可能である。また、目的に応じて、フィルムの積層成形や、二軸延伸によるフィルムの改質も可能である。
Rth=((nx+ny)/2−nz)×d
上記式中において、nx、ny、およびnzは、それぞれ、面内において伸張方向(ポリマー鎖の配向方向)をX軸、X軸に垂直な方向をY軸、フィルムの厚さ方向をZ軸とし、それぞれの軸方向の屈折率を表す。また、dはフィルムの厚さを表し、nx−nyは配向複屈折を表す。なお、溶融押出フィルムの場合は、MD方向がX軸、さらに延伸フィルムの場合は延伸方向がX軸となる。
には3N/25mm以上ある事がもっとも好ましい。
フィルムの膜厚は、デジマティックインジケーター(株式会社ミツトヨ製)を用いて測定した。
セイコーインスツルメンツ製の示差走査熱量分析装置(DSC)SSC−5200を用い、試料を一旦200℃まで25℃/分の速度で昇温した後10分間ホールドし、25℃/分の速度で50℃まで温度を下げる予備調整を経て、10℃/分の昇温速度で200℃まで昇温する間の測定を行い、得られたDSC曲線から積分値を求め(DDSC)、その極大点からガラス転移温度を求めた。
フィルムの全光線透過率、ヘイズ値は、(株)日本電色工業 NDH−300Aを用い、JIS K7105に記載の方法にて測定した。
上記のヘイズ値測定において、フィルムを純水につけた状態で測定した値を内部ヘイズ値とした。
(配向複屈折)
未延伸の膜厚100μmの原反フィルムから、18cm×18cmの試験片を切り出し、4辺全て保持してガラス転移温度+10℃にて5分保ち、2倍(100%に延伸とも言う)に120mm/分の速度で、同時に2軸方向に延伸する。その後、得られたフィルムを23℃に冷却し、サンプル中央部分をサンプリングし、自動複屈折計(王子計測株式会社製 KOBRA−WR)を用いて、温度23±2℃、湿度50±5%において、波長590nm、入射角0°にて複屈折(配向複屈折)を測定した。同時に、面内位相差Re、厚み方向位相差Rth(入射角40°)も測定した。(面内位相差Re、厚み方向位相差Rthに関しては、その詳細を後述する)。
実施例および比較例で得られた延伸フィルムから、40mm×40mmの試験片を切り出した。この試験片の面内位相差Reを、自動複屈折計(王子計測株式会社製 KOBRA−WR)を用いて、温度23±2℃、湿度50±5%において、波長590nm、入射角0゜で測定した。
(MITの評価)
フィルムの耐折り曲げ性は、(株)東洋精機製作所 MIT耐折疲労試験機を用い、JIS C5016の方法に従って行った。測定条件は、測定角度=135°、速度=175回/分、R=0.38、荷重100gとした。
得られたフィルムの鉛筆硬度を、JIS K5600−5−4に準じて測定した。
(コロナ放電処理)
上記で得られた(メタ)アクリル系保護フィルムの片側に、コロナ放電処理(コロナ放電電子照射量:77W/m2/min)を施した。
一液型水系ウレタン樹脂プライマー(荒川化学製、商品名:ユリアーノW321、固形分:34%)に対して純水を250重量部加え、コロナ放電処理を施した(メタ)アクリル系保護フィルムのコロナ放電処理面に、バーコーター(#3)で塗布した。その後、(メタ)アクリル系保護フィルムを熱風乾燥機(80℃)に投入し、ウレタン組成物を約5分乾燥させて、易接着層(0.2〜0.4μm)を形成した。
アセトアセチル基含有ポリビニルアルコール系樹脂(平均重合度:1200、ケン化度:98.5モル%,アセトアセチル基変性度:5モル%)100重量部に対し、メチロールメラミン20重量部を70℃の温度条件下で純水に溶解し、固形分濃度1.0%の水溶液を得た。得られた水溶液を接着剤組成物として、25℃の温度条件下で用いた。
易接着層を形成した(メタ)アクリル系保護フィルムの易接着層側に、乾燥後の厚みが50nmとなるように接着剤組成物を塗布した。その後、接着剤組成物を介して、日本合成化学製ポリビニルアルコールフィルムボブロンーEX(膜厚12μm)と(メタ)アクリル系保護フィルムを積層し、熱風乾燥機(100℃)に投入して5分間乾燥させて、積層体を得た。
JIS K 6854 に準じ、T型剥離試験を実施した。
得られたグラフト共重合体(多層構造粒子(E))2gをメチルエチルケトン50mlに溶解させ、遠心分離機(日立工機(株)製、CP60E)を用い、回転数30000rpmにて1時間遠心分離を行い、不溶分と可溶分とを分離した(遠心分離作業を合計3セット)。得られた不溶分を用いて、次式によりグラフト率を算出した。
なお、架橋重合体層の重量は、架橋重合体層を構成する単官能性単量体の仕込み重量である。
(メタ)アクリル系多層構造グラフト共重合体の最外層を除いた層までの平均粒子径(アクリル系ゴム粒子の平均粒子径)は、アクリル系ゴム粒子ラテックスの状態で測定した。測定装置として、株式会社 日立ハイテクノロジーズのU−5100形レシオビーム分光光度計を用いて、546nmの波長の光散乱を用いて求めた。
樹脂の屈折率は、それぞれの組成物をシート状に加工し、JIS K7142に準じて、アタゴ社製アッベ屈折計2Tを用いて、ナトリウムD線波長における屈折率(nD)を測定した。
まず、得られたスラリーの一部を採取・精秤し、それを熱風乾燥器中で120℃、1時間乾燥し、その乾燥後の重量を固形分量として精秤した。次に、乾燥前後の精秤結果の比率をスラリー中の固形成分比率として求めた。最後に、この固形成分比率を用いて、以下の計算式により重合転化率を算出した。なお、この数式1において、連鎖移動剤は仕込み単量体として取り扱った。
=〔(仕込み原料総重量×固形成分比率−水・単量体以外の原料総重量)/仕込み単量体重量〕×100
<グラフト共重合体(B1)の製造>
撹拌機付き8L重合装置に、以下の物質を仕込んだ。
脱イオン水 175部
ポリオキシエチレンラウリルエーテルリン酸 0.55部
ホウ酸 0.4725部
炭酸ナトリウム 0.04725部
<グラフト共重合体(B2)の製造>
撹拌機付き8L重合装置に、以下の物質を仕込んだ。
脱イオン水 175部
ポリオキシエチレンラウリルエーテルリン酸 0.55部
ホウ酸 0.4725部
炭酸ナトリウム 0.04725部
<グラフト共重合体(B3)の製造>
撹拌機付き8L重合装置に、以下の物質を仕込んだ。
脱イオン水 175部
ポリオキシエチレンラウリルエーテルリン酸 0.0104部
ホウ酸 0.4725部
炭酸ナトリウム 0.04725部
株式会社クラレ製 パラペットHR−Sをアクリル系樹脂(A1)として用いた。なお、ガラス転移温度は119℃であった。
直径40mmのフルフライトスクリューを用いた単軸押出機を用い、押出機の温度調整ゾーンの設定温度を255℃、スクリュー回転数を52rpmとし、表2に示すアクリル系樹脂(A)、および(メタ)アクリル系多層構造グラフト共重合体(B)の混合物を、10kg/hrの割合で供給した。押出機出口に設けられたダイスからストランドとして出てきた樹脂を水槽で冷却し、ペレタイザでペレット化した。
Claims (5)
- ガラス転移温度が110℃以上のアクリル系樹脂99〜50重量%と、
粒子状の(メタ)アクリル系多層構造グラフト共重合体1〜50重量%とを含む、光学用樹脂組成物であって、
前記(メタ)アクリル系多層構造グラフト共重合体が、メタクリル酸エステルを主要モノマーとする重合体からなる最内層、アルキル基の炭素数が4〜12のアクリル酸アルキルエステルを主要モノマーとする重合体からなる中間層、及び、メタクリル酸エステルを主要モノマーとする重合体からなる最外層を含み、グラフト率が120%以上である、光学用樹脂組成物。 - 前記アクリル系樹脂は、ガラス転移温度が115℃以上である、請求項1に記載の光学用樹脂組成物。
- 前記(メタ)アクリル系多層構造グラフト共重合体の最外層を構成するモノマーのうち、メタクリル酸エステルが90重量%以上を占める、請求項1又は2に記載の光学用樹脂組成物。
- 前記(メタ)アクリル系多層構造グラフト共重合体の最外層を除いた層までの平均粒子径が100nm以下である、請求項1〜3のいずれか1項に記載の光学用樹脂組成物。
- 請求項1〜4のいずれか1項に記載の光学用樹脂組成物からなるフィルム。
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