WO2022138932A1 - 単層位相差膜の製造方法及び単層位相差膜形成用重合体組成物 - Google Patents
単層位相差膜の製造方法及び単層位相差膜形成用重合体組成物 Download PDFInfo
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- WO2022138932A1 WO2022138932A1 PCT/JP2021/048253 JP2021048253W WO2022138932A1 WO 2022138932 A1 WO2022138932 A1 WO 2022138932A1 JP 2021048253 W JP2021048253 W JP 2021048253W WO 2022138932 A1 WO2022138932 A1 WO 2022138932A1
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- MVUXVDIFQSGECB-UHFFFAOYSA-N ethyl n-(3-triethoxysilylpropyl)carbamate Chemical compound CCOC(=O)NCCC[Si](OCC)(OCC)OCC MVUXVDIFQSGECB-UHFFFAOYSA-N 0.000 description 1
- MHBPZEDIFIPGSX-UHFFFAOYSA-N ethyl n-(3-trimethoxysilylpropyl)carbamate Chemical compound CCOC(=O)NCCC[Si](OC)(OC)OC MHBPZEDIFIPGSX-UHFFFAOYSA-N 0.000 description 1
- 125000004672 ethylcarbonyl group Chemical group [H]C([H])([H])C([H])([H])C(*)=O 0.000 description 1
- 125000000816 ethylene group Chemical group [H]C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000006355 external stress Effects 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 125000001153 fluoro group Chemical group F* 0.000 description 1
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 1
- VZCYOOQTPOCHFL-OWOJBTEDSA-L fumarate(2-) Chemical class [O-]C(=O)\C=C\C([O-])=O VZCYOOQTPOCHFL-OWOJBTEDSA-L 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 150000002432 hydroperoxides Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 229940119545 isobornyl methacrylate Drugs 0.000 description 1
- 238000006317 isomerization reaction Methods 0.000 description 1
- 125000003253 isopropoxy group Chemical group [H]C([H])([H])C([H])(O*)C([H])([H])[H] 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 150000002688 maleic acid derivatives Chemical class 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000005397 methacrylic acid ester group Chemical group 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 1
- ZGYTYDNWEZVHEL-UHFFFAOYSA-N methyl 2-tert-butylperoxycarbonyl-4-(4-tert-butylperoxycarbonyl-3-methoxycarbonylbenzoyl)benzoate Chemical compound C1=C(C(=O)OOC(C)(C)C)C(C(=O)OC)=CC=C1C(=O)C1=CC=C(C(=O)OOC(C)(C)C)C(C(=O)OC)=C1 ZGYTYDNWEZVHEL-UHFFFAOYSA-N 0.000 description 1
- XJRBAMWJDBPFIM-UHFFFAOYSA-N methyl vinyl ether Chemical compound COC=C XJRBAMWJDBPFIM-UHFFFAOYSA-N 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- PHQOGHDTIVQXHL-UHFFFAOYSA-N n'-(3-trimethoxysilylpropyl)ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCN PHQOGHDTIVQXHL-UHFFFAOYSA-N 0.000 description 1
- VNRDAMBPFDPXSM-UHFFFAOYSA-N n'-[2-(3-triethoxysilylpropylamino)ethyl]ethane-1,2-diamine Chemical compound CCO[Si](OCC)(OCC)CCCNCCNCCN VNRDAMBPFDPXSM-UHFFFAOYSA-N 0.000 description 1
- NHBRUUFBSBSTHM-UHFFFAOYSA-N n'-[2-(3-trimethoxysilylpropylamino)ethyl]ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCNCCN NHBRUUFBSBSTHM-UHFFFAOYSA-N 0.000 description 1
- PEDQVKWUOILUIP-UHFFFAOYSA-N n'-[2-[2-(3-triethoxysilylpropylamino)ethylamino]ethyl]ethane-1,2-diamine Chemical compound CCO[Si](OCC)(OCC)CCCNCCNCCNCCN PEDQVKWUOILUIP-UHFFFAOYSA-N 0.000 description 1
- PYVZTWLMZLWKJC-UHFFFAOYSA-N n'-[2-[2-(3-trimethoxysilylpropylamino)ethylamino]ethyl]ethane-1,2-diamine Chemical compound CO[Si](OC)(OC)CCCNCCNCCNCCN PYVZTWLMZLWKJC-UHFFFAOYSA-N 0.000 description 1
- MQWFLKHKWJMCEN-UHFFFAOYSA-N n'-[3-[dimethoxy(methyl)silyl]propyl]ethane-1,2-diamine Chemical compound CO[Si](C)(OC)CCCNCCN MQWFLKHKWJMCEN-UHFFFAOYSA-N 0.000 description 1
- LIBWSLLLJZULCP-UHFFFAOYSA-N n-(3-triethoxysilylpropyl)aniline Chemical compound CCO[Si](OCC)(OCC)CCCNC1=CC=CC=C1 LIBWSLLLJZULCP-UHFFFAOYSA-N 0.000 description 1
- KBJFYLLAMSZSOG-UHFFFAOYSA-N n-(3-trimethoxysilylpropyl)aniline Chemical compound CO[Si](OC)(OC)CCCNC1=CC=CC=C1 KBJFYLLAMSZSOG-UHFFFAOYSA-N 0.000 description 1
- CLYWMXVFAMGARU-UHFFFAOYSA-N n-benzyl-3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCNCC1=CC=CC=C1 CLYWMXVFAMGARU-UHFFFAOYSA-N 0.000 description 1
- 125000006606 n-butoxy group Chemical group 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004676 n-butylcarbonyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C(*)=O 0.000 description 1
- SEEYREPSKCQBBF-UHFFFAOYSA-N n-methylmaleimide Chemical compound CN1C(=O)C=CC1=O SEEYREPSKCQBBF-UHFFFAOYSA-N 0.000 description 1
- 125000003935 n-pentoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- VBEGHXKAFSLLGE-UHFFFAOYSA-N n-phenylnitramide Chemical compound [O-][N+](=O)NC1=CC=CC=C1 VBEGHXKAFSLLGE-UHFFFAOYSA-N 0.000 description 1
- 125000003506 n-propoxy group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])O* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000006252 n-propylcarbonyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C(*)=O 0.000 description 1
- HVYCQBKSRWZZGX-UHFFFAOYSA-N naphthalen-1-yl 2-methylprop-2-enoate Chemical compound C1=CC=C2C(OC(=O)C(=C)C)=CC=CC2=C1 HVYCQBKSRWZZGX-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- FZUGPQWGEGAKET-UHFFFAOYSA-N parbenate Chemical compound CCOC(=O)C1=CC=C(N(C)C)C=C1 FZUGPQWGEGAKET-UHFFFAOYSA-N 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 238000005502 peroxidation Methods 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- JRKICGRDRMAZLK-UHFFFAOYSA-L persulfate group Chemical group S(=O)(=O)([O-])OOS(=O)(=O)[O-] JRKICGRDRMAZLK-UHFFFAOYSA-L 0.000 description 1
- QIWKUEJZZCOPFV-UHFFFAOYSA-N phenyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OC1=CC=CC=C1 QIWKUEJZZCOPFV-UHFFFAOYSA-N 0.000 description 1
- WRAQQYDMVSCOTE-UHFFFAOYSA-N phenyl prop-2-enoate Chemical compound C=CC(=O)OC1=CC=CC=C1 WRAQQYDMVSCOTE-UHFFFAOYSA-N 0.000 description 1
- 125000004351 phenylcyclohexyl group Chemical group C1(=CC=CC=C1)C1(CCCCC1)* 0.000 description 1
- 125000004193 piperazinyl group Chemical group 0.000 description 1
- 125000003386 piperidinyl group Chemical group 0.000 description 1
- 229920005575 poly(amic acid) Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920000193 polymethacrylate Polymers 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000012673 precipitation polymerization Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- BOQSSGDQNWEFSX-UHFFFAOYSA-N propan-2-yl 2-methylprop-2-enoate Chemical compound CC(C)OC(=O)C(C)=C BOQSSGDQNWEFSX-UHFFFAOYSA-N 0.000 description 1
- LYBIZMNPXTXVMV-UHFFFAOYSA-N propan-2-yl prop-2-enoate Chemical compound CC(C)OC(=O)C=C LYBIZMNPXTXVMV-UHFFFAOYSA-N 0.000 description 1
- ILVGAIQLOCKNQA-UHFFFAOYSA-N propyl 2-hydroxypropanoate Chemical compound CCCOC(=O)C(C)O ILVGAIQLOCKNQA-UHFFFAOYSA-N 0.000 description 1
- JCMFJIHDWDKYIL-UHFFFAOYSA-N propyl 3-methoxypropanoate Chemical compound CCCOC(=O)CCOC JCMFJIHDWDKYIL-UHFFFAOYSA-N 0.000 description 1
- 229940032159 propylene carbonate Drugs 0.000 description 1
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- 125000004076 pyridyl group Chemical group 0.000 description 1
- HNJBEVLQSNELDL-UHFFFAOYSA-N pyrrolidin-2-one Chemical compound O=C1CCCN1 HNJBEVLQSNELDL-UHFFFAOYSA-N 0.000 description 1
- 125000000719 pyrrolidinyl group Chemical group 0.000 description 1
- 125000000168 pyrrolyl group Chemical group 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000006462 rearrangement reaction Methods 0.000 description 1
- 238000001226 reprecipitation Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 150000003440 styrenes Chemical class 0.000 description 1
- 125000005504 styryl group Chemical group 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- MUTNCGKQJGXKEM-UHFFFAOYSA-N tamibarotene Chemical compound C=1C=C2C(C)(C)CCC(C)(C)C2=CC=1NC(=O)C1=CC=C(C(O)=O)C=C1 MUTNCGKQJGXKEM-UHFFFAOYSA-N 0.000 description 1
- DPPBKURCPGWRJU-UHFFFAOYSA-N tert-butyl 4-(4-tert-butylperoxycarbonylbenzoyl)benzenecarboperoxoate Chemical compound C1=CC(C(=O)OOC(C)(C)C)=CC=C1C(=O)C1=CC=C(C(=O)OOC(C)(C)C)C=C1 DPPBKURCPGWRJU-UHFFFAOYSA-N 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 1
- BSYVTEYKTMYBMK-UHFFFAOYSA-N tetrahydrofurfuryl alcohol Chemical compound OCC1CCCO1 BSYVTEYKTMYBMK-UHFFFAOYSA-N 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 125000003866 trichloromethyl group Chemical group ClC(Cl)(Cl)* 0.000 description 1
- QQQSFSZALRVCSZ-UHFFFAOYSA-N triethoxysilane Chemical compound CCO[SiH](OCC)OCC QQQSFSZALRVCSZ-UHFFFAOYSA-N 0.000 description 1
- 125000003258 trimethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3083—Birefringent or phase retarding elements
-
- 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
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
-
- 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
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
-
- 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
- C08F220/00—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 a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
Definitions
- the present invention relates to a method for producing a single-layer retardation film and a polymer composition for forming a single-layer retardation film.
- a circular polarizing plate is used for a display device such as a liquid crystal display device or an organic electroluminescence (EL) display device in order to suppress reflection of external light on the display surface in order to improve display quality. ing.
- Such a circular polarizing plate is known to be a combination of a retardation plate and a polarizing element.
- the retardation plate includes a 1/4 wave plate that converts linearly polarized light into circularly polarized light, a 1/2 wave plate that converts the polarized vibration plane of linearly polarized light by 90 °, and the like. These retardation plates can be accurately converted into a phase difference of 1/4 wavelength or 1/2 wavelength of the ray wavelength for a specific monochromatic light.
- the conventional retardation plate has a problem that the polarized light output through the retardation plate is converted into colored polarization. This is because the retardation plate has a positive wavelength dispersibility in which the phase difference decreases as the wavelength increases, and it is polarized for each wavelength with respect to white light, which is a synthetic wave in which light rays in the visible light region are mixed. Due to the distribution, it is not possible to accurately adjust the phase difference to 1/4 wavelength in all wavelength regions.
- the retardation plate having reverse wavelength dispersibility is mainly produced by applying a polymerizable composition containing a special small molecule polymerizable compound to a film substrate. Therefore, a small molecule polymerizable liquid crystal compound having a reverse wavelength dispersibility or a polymerizable composition using the same has been widely developed. However, these small molecule polymerizable liquid crystal compounds or polymerizable compositions have a problem in terms of cost because they are synthesized in multiple stages by making full use of a synthetic method using a very expensive reagent. Was there.
- Japanese Unexamined Patent Publication No. 10-68816 Japanese Unexamined Patent Publication No. 2002-267838 Japanese Unexamined Patent Publication No. 2005-289980.
- Japanese Unexamined Patent Publication No. 2007-86105 Japanese Unexamined Patent Publication No. 2011-42606 Japanese Unexamined Patent Publication No. 2013-164501
- the present invention has been made in view of the above problems, and it is possible to fabricate a single-layer retardation film exhibiting flatness or anti-wavelength dispersibility at low cost without using a low-molecular-weight polymerizable liquid crystal compound having anti-wavelength dispersibility. It is an object of the present invention to provide a production method thereof and a polymer composition for forming a single-layer retardation film used in the production method.
- the present inventors prepare a flat or single-layer retardation film having a flat or reverse wavelength dispersibility using a composition containing a polymer having a positive wavelength dispersibility.
- a composition containing a polymer having a positive wavelength dispersibility In order to use the polymer having a photoreactive site that photoreacts with ultraviolet rays (photodimerization, photoisomerization or photofleece rearrangement), the process of irradiating polarized ultraviolet rays from the same surface twice or more is performed.
- the present invention provides the following method for producing a single-layer retardation film and a polymer composition for forming a single-layer retardation film.
- 1. 1.
- (I) A step of applying a polymer composition for forming a single-layer retardation film containing a polymer having a photoreactive site that photoreacts with ultraviolet rays in a side chain onto a substrate and drying to form a coating film.
- (II) The first exposure step of irradiating the coating film with the first polarized ultraviolet rays, and (III) the same surface as the surface of the coating film irradiated with the polarized ultraviolet rays and further irradiated with the first polarized ultraviolet rays.
- a method for producing a single-layer retardation film comprising a second exposure step of irradiating a second polarized ultraviolet ray having a different polarization axis direction from the first polarized ultraviolet ray. 2.
- (IV) A method for producing a single-layer retardation film, which comprises a step of heating the coating film obtained in step (III). 3.
- n1 and n2 are 0, 1, 2 or 3, respectively.
- L is a single bond or an alkylene group having 1 to 12 carbon atoms, and a part or all of the hydrogen atom of the alkylene group may be substituted with a halogen atom.
- T 1 is a single bond or an alkylene group having 1 to 12 carbon atoms, and a part or all of the hydrogen atom of the alkylene group may be substituted with a halogen atom.
- T 1 is a single bond
- a 2 is also a single bond.
- Y 1 and Y 2 are a phenylene group or a naphthylene group, and a part or all of the hydrogen atoms of the phenylene group and the naphthylene group are a cyano group, a halogen atom, an alkyl group having 1 to 5 carbon atoms, and 2 to 2 carbon atoms.
- P 1 , Q 1 and Q 2 are independently single-bonded, phenylene groups or divalent alicyclic hydrocarbon groups having 5 to 8 carbon atoms, and some or all of the hydrogen atoms of the phenylene group are present.
- each Q 1 may be the same or different from each other, and when the number of Q 2 is 2, each Q 2 may be the same or different from each other.
- R is a hydrogen atom, a cyano group, a halogen atom, a carboxy group, an alkyl group having 1 to 5 carbon atoms, an alkylcarbonyl group having 2 to 6 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, or an alkyl group having 1 to 5 carbon atoms. It is an alkoxy group.
- each X 1 may be the same or different from each other, and when the number of X 2 is 2, each X 2 may be the same or different from each other.
- G 1 and G 2 are independently N or CH, respectively. The dashed line is the bond. ) 5.
- R 1 is -NO 2 , -CN, halogen atom, phenyl group, naphthyl group, biphenylyl group, furanyl group, monovalent nitrogen-containing heterocyclic group, monovalent alicyclic hydrocarbon group having 5 to 8 carbon atoms, and carbon. It is an alkyl group having a number of 1 to 12 or an alkoxy group having a number of carbons of 1 to 12.
- R 2 is a phenyl group, a naphthyl group, a biphenylyl group, a furanyl group, a monovalent nitrogen-containing heterocyclic group or a monovalent alicyclic hydrocarbon group having 5 to 8 carbon atoms, and is a part of hydrogen atoms of these groups.
- R 3 is a hydrogen atom, -NO 2 , -CN, halogen atom, phenyl group, naphthyl group, biphenylyl group, furanyl group, monovalent nitrogen-containing heterocyclic group, and monovalent alicyclic hydrocarbon having 5 to 8 carbon atoms.
- a is an integer of 1 to 12.
- k1 to k5 are independently integers of 0 to 2, but the total of k1 to k5 is 2 or more.
- k6 and k7 are independently integers of 0 to 2, the total of k6 and k7 is 1 or more.
- m1, m2 and m3 are independently integers of 1 to 3.
- n is 0 or 1.
- a part or all of the hydrogen atoms of the benzene ring and the naphthalene ring in the formula are a cyano group, a halogen atom, an alkyl group having 1 to 5 carbon atoms, an alkylcarbonyl group having 2 to 6 carbon atoms or 1 to 5 carbon atoms. It may be substituted with the alkoxy group of. ) 7.
- a polymer composition for forming a single-layer retardation film which comprises a polymer having a photoreactive moiety in the side chain that photoreacts with ultraviolet rays.
- the polymer composition for forming a single-layer retardation film in which the side chain having a photoreactive moiety that photoreacts with ultraviolet rays is represented by any of the following formulas (a1) to (a6).
- n1 and n2 are 0, 1, 2 or 3, respectively.
- L is a single bond or an alkylene group having 1 to 12 carbon atoms, and a part or all of the hydrogen atom of the alkylene group may be substituted with a halogen atom.
- T 1 is a single bond or an alkylene group having 1 to 12 carbon atoms, and a part or all of the hydrogen atom of the alkylene group may be substituted with a halogen atom.
- T 1 is a single bond
- a 2 is also a single bond.
- Y 1 and Y 2 are a phenylene group or a naphthylene group, and a part or all of the hydrogen atoms of the phenylene group and the naphthylene group are a cyano group, a halogen atom, an alkyl group having 1 to 5 carbon atoms, and 2 to 2 carbon atoms.
- P 1 , Q 1 and Q 2 are independently single-bonded, phenylene groups or divalent alicyclic hydrocarbon groups having 5 to 8 carbon atoms, and some or all of the hydrogen atoms of the phenylene group are present.
- each Q 1 may be the same or different from each other, and when the number of Q 2 is 2, each Q 2 may be the same or different from each other.
- R is a hydrogen atom, a cyano group, a halogen atom, a carboxy group, an alkyl group having 1 to 5 carbon atoms, an alkylcarbonyl group having 2 to 6 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, or an alkyl group having 1 to 5 carbon atoms. It is an alkoxy group.
- each X 1 may be the same or different from each other, and when the number of X 2 is 2, each X 2 may be the same or different from each other.
- G 1 and G 2 are independently N or CH, respectively. The dashed line is the bond. ) 9. 8.
- R 1 is -NO 2 , -CN, halogen atom, phenyl group, naphthyl group, biphenylyl group, furanyl group, monovalent nitrogen-containing heterocyclic group, monovalent alicyclic hydrocarbon group having 5 to 8 carbon atoms, and carbon. It is an alkyl group having a number of 1 to 12 or an alkoxy group having a number of carbons of 1 to 12.
- R 2 is a phenyl group, a naphthyl group, a biphenylyl group, a furanyl group, a monovalent nitrogen-containing heterocyclic group or a monovalent alicyclic hydrocarbon group having 5 to 8 carbon atoms, and is a part of hydrogen atoms of these groups.
- R 3 is a hydrogen atom, -NO 2 , -CN, halogen atom, phenyl group, naphthyl group, biphenylyl group, furanyl group, monovalent nitrogen-containing heterocyclic group, and monovalent alicyclic hydrocarbon having 5 to 8 carbon atoms.
- a is an integer of 1 to 12.
- k1 to k5 are independently integers of 0 to 2, but the total of k1 to k5 is 2 or more.
- k6 and k7 are independently integers of 0 to 2, the total of k6 and k7 is 1 or more.
- m1, m2 and m3 are independently integers of 1 to 3.
- n is 0 or 1.
- a part or all of the hydrogen atoms of the benzene ring and the naphthalene ring in the formula are a cyano group, a halogen atom, an alkyl group having 1 to 5 carbon atoms, an alkylcarbonyl group having 2 to 6 carbon atoms or 1 to 5 carbon atoms. It may be substituted with the alkoxy group of. )
- a composition containing a polymer having positive wavelength dispersibility is used, and a circular phase difference is easily exhibited at low cost, and a single layer showing flat or reverse wavelength dispersibility is exhibited.
- a retardation film can be manufactured.
- the single-layer retardation film can convert linearly polarized light into circularly polarized light in a wide band.
- the method for producing a single-layer retardation film of the present invention is as follows.
- (I) A step of applying a polymer composition for forming a single-layer retardation film onto a substrate and drying it to form a coating film.
- (II) The first exposure step of irradiating the coating film with the first polarized ultraviolet rays, and (III) the same surface as the surface of the coating film irradiated with the polarized ultraviolet rays and further irradiated with the first polarized ultraviolet rays. It is characterized by including a second exposure step of irradiating a second polarized ultraviolet ray having a different polarization axis direction from the first polarized ultraviolet ray.
- the polarization axis direction is synonymous with the vibration direction of the polarized ultraviolet rays.
- Step (I) is a step of applying the polymer composition for forming a single-layer retardation film onto a substrate and drying it to form a coating film. More specifically, the polymer composition is applied to a substrate (for example, a silicon / silicon dioxide coated substrate, a silicon nitride substrate, a substrate coated with a metal such as aluminum, molybdenum, chromium, etc., a glass substrate, a quartz substrate, etc.
- a substrate for example, a silicon / silicon dioxide coated substrate, a silicon nitride substrate, a substrate coated with a metal such as aluminum, molybdenum, chromium, etc., a glass substrate, a quartz substrate, etc.
- TAC triacetyl cellulose
- cycloolefin polymer film polyethylene terephthalate film
- resin film such as acrylic film
- a heating means such as a hot plate, a heat circulation type oven, or an IR (infrared) type oven to evaporate the solvent to obtain a coating film.
- the temperature is not particularly limited, but is preferably 30 to 200 ° C, more preferably 30 to 150 ° C.
- the polymer composition for forming a single-layer retardation film of the present invention contains a polymer having a photoreactive moiety that photoreacts with ultraviolet rays in the side chain, and specifically, it is photosensitive that can exhibit liquidity. It contains a sex side chain polymer or a mixed side chain polymer having a liquid crystal side chain polymer and a photosensitive side chain polymer individually (hereinafter, also simply referred to as a side chain polymer).
- the coating film obtained from the composition is also a film having a side chain type polymer containing liquid crystal and photosensitive.
- This coating film is not subjected to a rubbing treatment, but is subjected to an orientation treatment by polarization irradiation. Then, after irradiation with polarization, the side chain polymer film is heated to obtain a film (single-layer retardation film) to which optical anisotropy is imparted. At this time, the slight anisotropy developed by the polarization irradiation becomes the driving force, and the side chain polymer itself is efficiently reoriented by self-assembly. As a result, highly efficient orientation processing can be realized as a single-layer retardation film, and a single-layer retardation film with high optical anisotropy can be obtained.
- the photoreactivity is one of (A-1) photocrosslinking (photodimerization) reaction, (A-2) photoisomerization, or (A-3) photofries rearrangement reaction; or a plurality of reactions.
- the side chain polymer preferably has a side chain that causes a (A-1) photocrosslinking reaction or (A-2) photoisomerization reaction.
- the side chain polymer is (i) a polymer that exhibits liquid crystallinity in a predetermined temperature range and has a photoreactive side chain.
- the side chain polymer preferably reacts with light in the wavelength range of (ii) 200 nm to 400 nm, preferably 240 nm to 400 nm, and exhibits liquid crystallinity in the temperature range of 50 to 300 ° C.
- the side chain polymer preferably has (iii) a photoreactive side chain that reacts with light in the wavelength range of 200 nm to 400 nm, preferably 240 nm to 400 nm, particularly polarized ultraviolet light.
- the side chain polymer preferably has a mesogen group because it exhibits liquid crystallinity in the temperature range of (iv) 50 to 300 ° C.
- the side chain polymer has a photoreactive side chain having photoreactivity.
- the structure of the side chain is not particularly limited, but has a structure that causes the reaction shown in (A-1), (A-2) and / or (A-3), and in particular, (A-1) light. It is preferable to have a structure that causes a cross-linking reaction and / or a (A-2) photoisomerization reaction.
- the structure that causes the (A-1) photocrosslinking reaction is such that the structure after the reaction can stably maintain the orientation of the side chain polymer for a long period of time even when exposed to external stress such as heat. preferable.
- the structure that causes the (A-2) photoisomerization reaction enables alignment processing at a lower exposure rate compared to photocrosslinking and photofleece transition, and can improve production efficiency during retardation film production. preferable.
- the side chain structure of the side chain type polymer has a rigid mesogen component because the orientation of the liquid crystal is stable.
- the mesogen component include, but are not limited to, a biphenyl group, a terphenyl group, a phenylcyclohexyl group, and a phenylbenzoate group.
- side chain a As the side chain (hereinafter, also referred to as side chain a) having a photoreactive moiety that photoreacts with ultraviolet rays contained in the polymer, one represented by any of the following formulas (a1) to (a6) is used. preferable. From the viewpoint of solubility in a solvent, the number of benzene rings contained in one side chain a is preferably 3 or less.
- n1 and n2 are independently 0, 1, 2 or 3, respectively.
- L is a single bond or an alkylene group having 1 to 12 carbon atoms, and a part or all of the hydrogen atom of the alkylene group may be substituted with a halogen atom.
- T 1 is a single bond or an alkylene group having 1 to 12 carbon atoms, and a part or all of the hydrogen atom of the alkylene group may be substituted with a halogen atom.
- Y 1 and Y 2 are a phenylene group or a naphthylene group, and a part or all of the hydrogen atoms of the phenylene group and the naphthylene group are a cyano group, a halogen atom, an alkyl group having 1 to 5 carbon atoms, and 2 to 2 carbon atoms. It may be substituted with an alkylcarbonyl group of 6 or an alkoxy group having 1 to 5 carbon atoms.
- P 1 , Q 1 and Q 2 are independently single-bonded, phenylene groups or divalent alicyclic hydrocarbon groups having 5 to 8 carbon atoms, and some or all of the hydrogen atoms of the phenylene group are present.
- each Q 1 may be the same or different from each other, and when the number of Q 2 is 2, each Q 2 may be the same or different from each other.
- R is a hydrogen atom, a cyano group, a halogen atom, a carboxy group, an alkyl group having 1 to 5 carbon atoms, an alkylcarbonyl group having 2 to 6 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, or an alkyl group having 1 to 5 carbon atoms. It is an alkoxy group.
- each X 1 may be the same or different from each other, and when the number of X 2 is 2, each X 2 may be the same or different from each other.
- G 1 and G 2 are independently N or CH, respectively. The dashed line is the bond.
- the alkylene group having 1 to 12 carbon atoms may be linear, branched or cyclic, and specific examples thereof include a methylene group, an ethylene group, a propane-1,3-diyl group and a butane-1,4. -Diyl group, pentane-1,5-diyl group, hexane-1,6-diyl group, heptane-1,7-diyl group, octane-1,8-diyl group, nonan-1,9-diyl group, decane -1,10-diyl group and the like can be mentioned.
- halogen atom examples include a fluorine atom, a chlorine atom, a bromine atom, an iodine atom and the like.
- the alkyl group having 1 to 5 carbon atoms may be linear or branched, and specific examples thereof include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group and tert-butyl. Groups, n-pentyl groups and the like can be mentioned.
- alkylcarbonyl group having 2 to 6 carbon atoms include a methylcarbonyl (acetyl) group, an ethylcarbonyl group, an n-propylcarbonyl group, an n-butylcarbonyl group, an n-pentylcarbonyl group and the like.
- alkoxy group having 1 to 5 carbon atoms include a methoxy group, an ethoxy group, an n-propoxy group, an isopropoxy group, an n-butoxy group, an n-pentyloxy group and the like.
- divalent alicyclic hydrocarbon group having 5 to 8 carbon atoms examples include a cyclopentanediyl group, a cyclohexanediyl group, a cycloheptanediyl group, and a cyclooctanediyl group.
- cycloalkyl group having 3 to 7 carbon atoms include a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group and the like.
- the side chain a may be represented by the following formulas (a1-1), (a1-2), (a2-1), (a3-1), (a4-1), (a5-1) or (a6-1). What is represented is more preferred. (In the formula, L, A 1 , A 2 , Y 1 , Y 2 , P 1 , Q 1 , T 1 , R, X 1 , Cou, E, G 1 , G 2 , n 1 and the broken line are the same as above. .)
- the side chain represented by the formula (a1-1) is preferably the side chain represented by the following formula (a1-1-1), and the side chain represented by the formula (a1-2) is the side chain represented by the formula (a1-2).
- the side chain represented by a1-2-1) is preferable. (In the formula, L, R and the broken line are the same as above.)
- the side chain represented by the formula (a2-1) As the side chain represented by the formula (a2-1), the side chain represented by the following formula (a2-1-1) is preferable. (In the formula, L, A 2 , Q 1 , T 1 , R and the broken line are the same as above.)
- the side chain represented by the formula (a3-1) As the side chain represented by the formula (a3-1), the side chain represented by the following formula (a3-1-1), (a3-1-2) or (a3-1-3) is preferable. (In the formula, L, Cou and the broken line are the same as above.)
- the side chain represented by the formula (a4-1) is represented by the following formula (a4-1-1), (a4-1-2), (a4-1-3) or (a4-1-4). Side chains are preferred. (In the formula, L, R and the broken line are the same as above.)
- the side chain represented by the formula (a5-1) As the side chain represented by the formula (a5-1), the side chain represented by the following formula (a5-1-1) or (a5-1-2) is preferable. (In the formula, L, R and the broken line are the same as above.)
- the side chain represented by the formula (a6-1) As the side chain represented by the formula (a6-1), the side chain represented by the following formula (a6-1-1), (a6-1-2) or (a6-1-3) is preferable. (In the formula, L, R and the broken line are the same as above.)
- the side chain polymer used in the present invention has a photosensitive side chain bonded to the main chain and is sensitive to optimum light selected from wavelengths of 200 nm to 400 nm, particularly light having wavelengths of 254 nm to 313 nm and 365 nm. Then, a cross-linking reaction, an isomerization reaction or a fleece rearrangement can occur.
- the structure of the photosensitive side chain polymer is not particularly limited as long as it satisfies such characteristics, but it is preferable that the side chain structure has a rigid mesogen component. When the side chain polymer is used as a single-layer retardation film, stable optical anisotropy can be obtained.
- More specific examples of the structure of the photosensitive side chain polymer include radical polymerizable properties such as (meth) acrylate, itaconate, fumarate, maleate, ⁇ -methylene- ⁇ -butyrolactone, styrene, vinyl, maleimide and norbornene.
- a structure having a main chain composed of at least one selected from the group consisting of radicals and siloxane and a side chain a is preferable.
- the side chain type polymer may further contain a side chain (hereinafter, also referred to as side chain b) that is neither photodimerified nor photoisomerized.
- the side chain b is preferably represented by any of the following formulas (b1) to (b11), but is not limited thereto. In the following formula, the broken line is a bond.
- R 1 is -NO 2 , -CN, halogen atom, phenyl group, naphthyl group, biphenylyl group, furanyl group, monovalent nitrogen-containing heterocyclic group, monovalent alicyclic hydrocarbon group having 5 to 8 carbon atoms, and carbon. It is an alkyl group having a number of 1 to 12 or an alkoxy group having a number of carbons of 1 to 12.
- R 2 is a phenyl group, a naphthyl group, a biphenylyl group, a furanyl group, a monovalent nitrogen-containing heterocyclic group or a monovalent alicyclic hydrocarbon group having 5 to 8 carbon atoms, and is a part of hydrogen atoms of these groups. Alternatively, all of them may be substituted with -NO 2 , -CN, a halogen atom, an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1 to 5 carbon atoms.
- R 3 is a hydrogen atom, -NO 2 , -CN, halogen atom, phenyl group, naphthyl group, biphenylyl group, furanyl group, monovalent nitrogen-containing heterocyclic group, and monovalent alicyclic hydrocarbon having 5 to 8 carbon atoms.
- a is an integer of 1 to 12.
- k1 to k5 are independently integers of 0 to 2, but the total of k1 to k5 is 2 or more.
- k6 and k7 are independently integers of 0 to 2, the total of k6 and k7 is 1 or more.
- m1, m2 and m3 are independently integers of 1 to 3.
- n is 0 or 1.
- a part or all of the hydrogen atoms of the benzene ring and the naphthalene ring in the formula are a cyano group, a halogen atom, an alkyl group having 1 to 5 carbon atoms, an alkylcarbonyl group having 2 to 6 carbon atoms or 1 to 5 carbon atoms. It may be substituted with the alkoxy group of.
- the monovalent nitrogen-containing heterocyclic group examples include a pyrrolidinyl group, a piperidinyl group, a piperazinyl group, a pyrrolyl group, a pyridyl group and the like.
- Specific examples of the monovalent alicyclic hydrocarbon group having 5 to 8 carbon atoms include cyclopentyl and cyclohexyl groups.
- Examples of the alkyl group and the alkoxy group include the same groups as those exemplified in the explanations of the formulas (a1) to (a6).
- the side chain type polymer used in the present invention can be obtained by polymerizing a monomer that gives a side chain a and, if necessary, a monomer that gives a side chain b.
- Examples of the monomer giving the side chain a include the following formulas (M1-1), (M1-2), (M2), (M3), (M4), (M5) or (M6). ) Is mentioned. (In the formula, A 1 , A 2 , D 1 , L, T 1 , Y 1 , Y 2 , P 1 , Q 1 , Q 2 , R, Cou, E, X 1 , X 2 , G 1 , G 2 , N1 and n2 are the same as above.)
- PG is a polymerizable group
- the following formulas (PG1) to (PG1) to (The group represented by any of PG8) is preferable.
- an acrylic group or a methacrylic group represented by the formula (PG1) is preferable from the viewpoint of easy control of the polymerization reaction and the stability of the polymer.
- RA is a hydrogen atom or a methyl group, and the broken line is a bond with L.
- the compound represented by the formula (M1-1) is preferably represented by the following formula (M1-1-1), and the compound represented by the formula (M1-2) is preferably represented by the following formula (M1-1-2).
- Those represented by 2-1) are preferable.
- PG, L, Y 1 , P 1 and R are the same as described above.
- the compound represented by the formula (M3) the compound represented by the following formula (M3-1) is preferable.
- PG, A 1 , L, X 1 , Q 1 , Cou and n 1 are the same as described above.
- the compound represented by the formula (M4) the compound represented by the following formula (M4-1) is preferable.
- PG, A 1 , L, X 1 , Y 1 , Y 2 , Q 1 , E, R and n 1 are the same as above.
- the compound represented by the formula (M5) the compound represented by the following formula (M5-1) is preferable.
- the compound represented by the following formula (M5-1) is preferable.
- PG, A 1 , L, X 1 , Y 1 , Y 2 , Q 1 , R and n 1 are the same as above.
- the compound represented by the formula (M6) the compound represented by the following formula (M6-1) is preferable.
- PG, A 1 , L, X 1 , Y 1 , Y 2 , Q 1 , G 1 , G 2 , R and n 1 are the same as above.
- the compound represented by the formula (M1-1-1) is preferably represented by the following formula (M1-1-2), and the compound represented by the formula (M1-2-1) is described below. Those represented by the formula (M1-2-2) are preferable. (In the formula, PG, L and R are the same as described above.)
- the compound represented by the formula (M2-1) the compound represented by the following formula (M2-2) is preferable.
- PG, A 2 , L, T 1 , Q 1 and R are the same as above.
- Examples of the compound represented by the formula (M1-1) include those represented by any of the following formulas (A-1-1-1) to (A-1-1-13).
- PG is a polymerizable group
- s1 represents the number of methylene groups, which is an integer of 2 to 9.
- R 12 is -H, -CH 3 , -. OCH 3 , -CN or -F.
- Examples of the compound represented by the formula (M1-2) include those represented by any of the following formulas (A-1-2-1) to (A1-2-4).
- PG is a polymerizable group
- s1 is the same as described above.
- Specific examples of the compound represented by the formula (M1-2) include 4- (6-methacrylicoxyhexyl-1-oxy) cinnamic acid and 4- (6-acrylicoxyhexyl-1-oxy) cinnamic acid. , 4- (3-methacrylicoxypropyl-1-oxy) cinnamic acid, 4- [4- (6-methacryloxyhexyl-1-oxy) benzoyloxy] cinnamic acid and the like.
- Examples of the compound represented by the formula (M2) include those represented by any of the following formulas (A-2-1) to (A-2-9).
- PG is a polymerizable group
- s1 and s2 represent the number of methylene groups, which are independently integers of 2 to 9. be.
- Examples of the compound represented by the formula (M3) include those represented by any of the following formulas (A-3-1) to (A-3-5).
- PG is a polymerizable group
- s1 is the same as described above.
- Examples of the compound represented by the formula (M4) include those represented by any of the following formulas (A-4-1) to (A-4-4).
- PG is a polymerizable group
- s1 is the same as described above.
- Examples of the compound represented by the formula (M5) include those represented by any of the following formulas (A-5-1) to (A-5-3).
- PG is a polymerizable group
- s1 is the same as described above.
- Examples of the compound represented by the formula (M6) include those represented by any of the following formulas (A-6-1) to (A-6-3).
- PG is a polymerizable group
- s1 is the same as described above.
- monomer MB As an example of a monomer (hereinafter, also referred to as monomer MB) that gives a side chain b that is neither photodimerified nor photoisomerized, a monomer capable of forming a mesogen group in the side chain can be mentioned.
- the mesogen group may be a group having a mesogen structure by itself, such as biphenyl or phenylbenzoate, or a group having a mesogen structure by hydrogen-bonding side chains such as benzoic acid.
- the following structure is preferable as the mesogen group contained in the side chain.
- the monomer MB are selected from the group consisting of radically polymerizable groups such as hydrocarbons, (meth) acrylates, itaconates, fumarates, maleates, ⁇ -methylene- ⁇ -butyrolactone, styrene, vinyl, maleimide, norbornene, and siloxanes. It is preferable that the structure has a structure consisting of a polymerizable group derived from at least one of the above and at least one of the formulas (b1) to (b11). In particular, the monomer MB preferably has a polymerizable group derived from (meth) acrylate.
- radically polymerizable groups such as hydrocarbons, (meth) acrylates, itaconates, fumarates, maleates, ⁇ -methylene- ⁇ -butyrolactone, styrene, vinyl, maleimide, norbornene, and siloxanes. It is preferable that the structure has a structure consisting of a polymerizable
- Preferred examples of the monomer MB include those represented by the following formulas (MB-1) to (MB-8).
- PG is a polymerizable group
- p represents the number of methylene groups, and is an integer of 2 to 9.
- other monomers can be copolymerized as long as the photoreactiveness and / or liquid crystallinity development ability is not impaired.
- the other monomers include industrially available radical polymerization-reactive monomers.
- Specific examples of the other monomers include unsaturated carboxylic acids, acrylic acid ester compounds, methacrylic acid ester compounds, maleimide compounds, acrylonitrile, maleic anhydride, styrene compounds, vinyl compounds and the like.
- unsaturated carboxylic acid examples include acrylic acid, methacrylic acid, itaconic acid, maleic acid, fumaric acid and the like.
- acrylic acid ester compound examples include methyl acrylate, ethyl acrylate, isopropyl acrylate, benzyl acrylate, naphthyl acrylate, anthryl acrylate, anthryl methyl acrylate, phenyl acrylate, 2,2,2-trifluoroethyl acrylate, and tert.
- methacrylic acid ester compound examples include methyl methacrylate, ethyl methacrylate, isopropyl methacrylate, benzyl methacrylate, naphthyl methacrylate, anthryl methacrylate, anthryl methyl methacrylate, phenyl methacrylate, 2,2,2-trifluoroethyl methacrylate and tert.
- vinyl compound examples include vinyl ether, methyl vinyl ether, benzyl vinyl ether, 2-hydroxyethyl vinyl ether, phenyl vinyl ether, propyl vinyl ether and the like.
- styrene compound examples include styrene, 4-methylstyrene, 4-chlorostyrene, 4-bromostyrene and the like.
- maleimide compound examples include maleimide, N-methylmaleimide, N-phenylmaleimide, N-cyclohexylmaleimide and the like.
- the contents of the side chain a and the side chain b are not particularly limited.
- a homopolymer having a side chain a of 100 mol% may be used, and two or more types of side chains a may be used.
- the side chain a is preferably 5 to 99.9 mol%, more preferably 5 to 95 mol% from the viewpoint of photoreactivity, and from the viewpoint of photostability. 5-50 mol% is even more preferred.
- the side chain b is preferably 95 mol% or less, more preferably 5 to 95 mol%, and even more preferably 50 mol% or more from the viewpoint of photostability. Even in the case of a copolymer, two or more types of side chains a and b may be used.
- the side chain type polymer used in the present invention may contain other side chains.
- the content of the other side chains is the rest when the total content of the side chains a and b is less than 100 mol%.
- the method for producing the side chain polymer is not particularly limited, and a general-purpose method that is industrially handled can be used. Specifically, it can be produced by radical polymerization, cationic polymerization or anionic polymerization using the vinyl group of the monomer MA, the monomer MB and other monomers as needed. Among these, radical polymerization is particularly preferable from the viewpoint of ease of reaction control and the like.
- a known compound such as a radical polymerization initiator (radical thermal polymerization initiator, radical photopolymerization initiator) or a reversible addition-cleaving chain transfer (RAFT) polymerization reagent shall be used. Can be done.
- a radical polymerization initiator radiation thermal polymerization initiator, radical photopolymerization initiator
- RAFT reversible addition-cleaving chain transfer
- the radical thermal polymerization initiator is a compound that generates radicals by heating to a temperature higher than the decomposition temperature.
- examples of such radical thermal polymerization initiators include ketone peroxides (methyl ethyl ketone peroxide, cyclohexanone peroxide, etc.), diacyl peroxides (acetyl peroxide, benzoyl peroxide, etc.), and hydroperoxides (peroxidation).
- the radical photopolymerization initiator is not particularly limited as long as it is a compound that initiates radical polymerization by light irradiation.
- examples of such radical photopolymerization initiators include benzophenone, Michler's ketone, 4,4'-bis (diethylamino) benzophenone, xanthone, thioxanthone, isopropylxanthone, 2,4-diethylthioxanthone, 2-ethylanthraquinone, acetophenone and 2-hydroxy.
- the radical polymerization method is not particularly limited, and an emulsion polymerization method, a suspension polymerization method, a dispersion polymerization method, a precipitation polymerization method, a bulk polymerization method, a solution polymerization method and the like can be used.
- the organic solvent used in the polymerization reaction is not particularly limited as long as the produced polymer can be dissolved. Specific examples thereof include N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, N-methyl- ⁇ -caprolactam, dimethylsulfoxide, and tetramethylurea.
- Ppyridine dimethyl sulfone, hexamethylphosphate triamide, ⁇ -butyrolactone, ⁇ -valerolactone, isopropyl alcohol, methoxymethylpentanol, dipentene, ethylamyl ketone, methyl nonyl ketone, methyl ethyl ketone, methyl isoamyl ketone, methyl isopropyl ketone, methyl Cellosolve, ethyl cellosolve, methyl cellosolve acetate, ethyl cellosolve acetate, butyl carbitol, ethyl carbitol, ethylene glycol, ethylene glycol monoacetate, ethylene glycol monoisopropyl ether, ethylene glycol monobutyl ether, propylene glycol, propylene glycol monoacetate, propylene glycol.
- the solvent may be mixed with the above-mentioned organic solvent and used as long as the produced polymer does not precipitate.
- oxygen in the organic solvent causes the polymerization reaction to be inhibited, so it is preferable to use an organic solvent that has been degassed to the extent possible.
- the polymerization temperature at the time of radical polymerization can be selected from any temperature in the range of 20 to 150 ° C, but is preferably in the range of 30 to 100 ° C.
- the reaction can be carried out at any concentration, but if the concentration is too low, it becomes difficult to obtain a polymer having a high molecular weight, and if the concentration is too high, the viscosity of the reaction solution becomes too high, making uniform stirring difficult. Therefore, the monomer concentration is preferably 1 to 50% by mass, more preferably 5 to 35% by mass.
- the initial reaction can be carried out at a high concentration and then an organic solvent can be added.
- the ratio of the radical polymerization initiator when the ratio of the radical polymerization initiator is large with respect to the monomer, the molecular weight of the obtained polymer is small, and when the ratio is small, the molecular weight of the obtained polymer is large. It is preferably 0.1 to 15 mol% with respect to the monomer to be polymerized. Further, various monomer components, solvents, initiators and the like can be added at the time of polymerization.
- the polymer produced from the reaction solution obtained by the above reaction can be recovered by pouring the reaction solution into a poor solvent and precipitating it, but this reprecipitation treatment is not essential.
- the poor solvent used for precipitation include methanol, acetone, hexane, heptane, butyl cellosolve, heptane, methyl ethyl ketone, methyl isobutyl ketone, ethanol, toluene, benzene, diethyl ether, methyl ethyl ether, water and the like.
- the polymer put into a poor solvent and precipitated can be collected by filtration and then dried at room temperature or by heating under normal pressure or reduced pressure.
- impurities in the polymer can be reduced.
- the poor solvent at this time include alcohols, ketones, hydrocarbons and the like, and it is preferable to use three or more kinds of poor solvents selected from these because the efficiency of purification is further improved.
- the weight average molecular weight (Mw) of the side chain polymer used in the present invention is 2,000 to 2,000, considering the strength of the obtained coating film, workability at the time of forming the coating film, and uniformity of the coating film. 000 is preferable, 2,000 to 1,000,000 is more preferable, and 5,000 to 200,000 is even more preferable.
- Mw is a polystyrene-equivalent measured value obtained by a gel permeation chromatography (GPC) method.
- the polymerizable composition used in the present invention contains the side chain polymer and an organic solvent (good solvent).
- the organic solvent (good solvent) is not particularly limited as long as it is an organic solvent that dissolves the polymer component. Specific examples thereof include N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, N-methyl- ⁇ -caprolactum, 2-pyrrolidone, N-ethyl-2-pyrrolidone, and N-.
- Vinyl-2-pyrrolidone dimethyl sulfoxide, tetramethyl urea, pyridine, dimethyl sulfoxide, hexamethyl sulfoxide, ⁇ -butyrolactone, 3-methoxy-N, N-dimethylpropanamide, 3-ethoxy-N, N-dimethylpropanamide, 3-Butoxy-N, N-dimethylpropanamide, 1,3-dimethyl-2-imidazolidinone, ethylamylketone, methylnonylketone, methylethylketone, methylisoamylketone, methylisopropylketone, cyclohexanone, cyclopentanone, ethylene carbonate , Propylene carbonate, diglime, 4-hydroxy-4-methyl-2-pentanone, tetrahydrofuran, tetrahydrofurfuryl alcohol and the like. These may be used alone or in combination of two or more.
- the polymer composition may contain components other than the side chain type polymer and the organic solvent (good solvent).
- examples thereof include a solvent (poor solvent) and a compound that improve the film thickness uniformity and surface smoothness when the polymer composition is applied, a compound that improves the adhesion between the retardation film and the substrate, and the like.
- a solvent poor solvent
- a compound that improves the film thickness uniformity and surface smoothness when the polymer composition is applied a compound that improves the adhesion between the retardation film and the substrate, and the like.
- the solvent (poor solvent) for improving film thickness uniformity and surface smoothness examples include isopropyl alcohol, methoxymethylpentanol, methyl cellosolve, ethyl cellosolve, butyl cellosolve, methyl cellosolve acetate, ethyl cellosolve acetate, and butyl carbitol.
- the poor solvent may be used alone or in combination of two or more.
- the content thereof is preferably 5 to 80% by mass, more preferably 10 to 60% by mass in the solvent so as not to significantly reduce the solubility of the polymer.
- Examples of the compound that improves the film thickness uniformity and the surface smoothness include a fluorine-based surfactant, a silicone-based surfactant, and a nonion-based surfactant. Specific examples of these include Ftop (registered trademark) 301, EF303, EF352 (manufactured by Tochem Products), Megafuck (registered trademark) F171, F173, F560, F563, R-30, R-40 (DIC).
- the content of these surfactants is preferably 0.01 to 2 parts by mass, more preferably 0.01 to 1 part by mass with respect to 100 parts by mass of the side chain polymer.
- the compound that improves the adhesion between the retardation film and the substrate include functional silane-containing compounds, and specific examples thereof include 3-aminopropyltrimethoxysilane and 3-aminopropyltriethoxy.
- the polymer composition contains a phenoplast-based compound and an epoxy group-containing compound for the purpose of improving the adhesion between the substrate and the retardation film and preventing deterioration of the characteristics due to the backlight when the polarizing plate is formed. But it may be.
- phenoplast-based compound examples include, but are not limited to, those shown below.
- epoxy group-containing compound examples include ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, propylene glycol diglycidyl ether, tripropylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, neopentyl glycol diglycidyl ether, 1.
- 6-Hexanediol diglycidyl ether glycerin diglycidyl ether, dibromoneopentyl glycol diglycidyl ether, 1,3,5,6-tetraglycidyl-2,4-hexanediol, N, N, N', N'-
- examples thereof include tetraglycidyl-m-xylene diamine, 1,3-bis (N, N-diglycidylaminomethyl) cyclohexane, N, N, N', N'-tetraglycidyl-4,4'-diaminodiphenylmethane and the like.
- the content thereof is preferably 0.1 to 30 parts by mass with respect to 100 parts by mass of the side chain type polymer contained in the polymer composition, and 1 to 20 parts by mass. Parts by mass are more preferred. If the content is less than 0.1 parts by mass, the effect of improving the adhesion cannot be expected, and if it is more than 30 parts by mass, the orientation of the liquid crystal may be deteriorated.
- a photosensitizer can also be used as an additive.
- a colorless sensitizer and a triplet sensitizer are preferable.
- photosensitizer examples include aromatic nitro compounds, coumarin (7-diethylamino-4-methyl coumarin, 7-hydroxy 4-methyl coumarin), keto coumarin, carbonyl biscumarin, aromatic 2-hydroxyketone, and aromatic 2-hydroxy.
- Ketone (2-hydroxybenzophenone, mono- or di-p- (dimethylamino) -2-hydroxybenzophenone, etc.), acetophenone, anthraquinone, xanthone, thioxanthone, benzanthron, thiazolin (2-benzoylmethylene-3-methyl- ⁇ - Naftthiazolin, 2- ( ⁇ -naphthoylmethylene) -3-methylbenzothiazolin, 2- ( ⁇ -naphthoylmethylene) -3-methylbenzothiazolin, 2- (4-biphenoylmethylene) -3-methylbenzothiazolin , 2- ( ⁇ -naphthoyl methylene) -3-methyl- ⁇ -naphthiazolin, 2- (4-biphenoyl methylene) -3-methyl- ⁇ -naphthiazolin, 2- (p-fluorobenzoyl methylene) -3 -Met
- aromatic 2-hydroxyketone (benzophenone), coumarin, ketocoumarin, carbonylbiscmarin, acetophenone, anthraquinone, xanthone, thioxanthone and acetophenone ketal are preferred.
- the polymer composition includes a dielectric or a conductive substance for the purpose of changing the electrical characteristics such as the dielectric constant and the conductivity of the retardation film as long as the effect of the present invention is not impaired.
- a crosslinkable compound may be added for the purpose of increasing the hardness and the density of the film when it is made into a retardation film.
- the polymer composition is preferably prepared as a coating liquid so as to be suitable for forming a single-layer retardation film. That is, in the polymer composition used in the present invention, a side chain polymer, the above-mentioned compound for improving film thickness uniformity and surface smoothness, a compound for improving adhesion to a substrate, and the like are organic solvents (good). It is preferably prepared as a solution dissolved in a solvent).
- the content of the side chain type polymer in the polymer composition is preferably 1 to 30% by mass, more preferably 3 to 25% by mass.
- the polymer composition may contain other polymers as long as the liquid crystal expression ability and photosensitive performance are not impaired.
- the other polymer include polymers such as poly (meth) acrylate, polyamic acid, and polyimide, which are not photosensitive side chain polymers capable of exhibiting liquid crystallinity.
- the content thereof is preferably 0.5 to 80% by mass, more preferably 1 to 50% by mass, based on the total polymer components.
- the step (II) is a step (first exposure step) of irradiating the coating film with the first polarized ultraviolet rays.
- the substrate is irradiated with polarized ultraviolet rays from a certain direction via a polarizing plate.
- ultraviolet rays having a wavelength in the range of 200 to 400 nm can be used.
- the optimum wavelength is selected via a filter or the like depending on the type of the coating film to be used.
- ultraviolet rays having a wavelength in the range of 240 to 400 nm can be selected and used so that the photocrosslinking reaction can be selectively induced.
- the ultraviolet light for example, light emitted from a high-pressure mercury lamp can be used.
- the irradiation amount of polarized ultraviolet rays depends on the coating film used. That is, the irradiation amount is 1 to 70 of the amount of polarized ultraviolet rays that realizes the maximum value of ⁇ A, which is the difference between the ultraviolet absorbance in the direction parallel to the polarization axis direction and the ultraviolet absorbance in the direction perpendicular to the polarization axis direction in the coating film. It is preferably in the range of%, and more preferably in the range of 1 to 50%.
- the polarized ultraviolet rays may be irradiated from the interface side between the coating film and the air (hereinafter, also referred to as the air side), and when a transparent substrate is used, the interface side between the coating film and the substrate (hereinafter, also referred to as the air side). Hereinafter, it may be irradiated from the substrate side).
- the step (III) is a step (second exposure step) of irradiating the coating film irradiated with the polarized ultraviolet rays with a second polarized ultraviolet ray having a polarization axis direction different from that of the first polarized ultraviolet rays.
- the second polarized ultraviolet ray preferably has an angle formed by the polarization axis direction of the first polarized ultraviolet ray of 10 to 80 ° or 100 to 170 °, and is 20 to 70 ° or 110 to 160 °.
- the temperature of ° is more preferable, and the temperature of 40 to 70 ° or 110 to 140 ° is even more preferable.
- step (III) the type of ultraviolet rays and the irradiation amount thereof may be the same as or different from those in step (II).
- the polarized ultraviolet rays irradiate the same surface as the surface irradiated with the first polarized ultraviolet rays in the step (II). That is, when the polarized ultraviolet rays are irradiated from the air side in the step (II), the polarized ultraviolet rays are irradiated from the air side in the step (III), and when the polarized ultraviolet rays are irradiated from the substrate side in the step (II), the step ( In III), the polarized ultraviolet rays are emitted from the substrate side. In steps (II) and (III), it is preferable to irradiate the polarized ultraviolet rays from the air side.
- a second method using a polarizing plate having a polarization axis direction different from that of the polarizing plate in the first exposure step by a predetermined angle is used.
- the ultraviolet rays irradiated in the step (II) and the ultraviolet rays irradiated in the step (III) have different wavelengths.
- the step (II) is irradiated with ultraviolet rays having a wavelength of around 313 nm and the step (III) is irradiated with ultraviolet rays having a wavelength of around 365 nm
- the step (II) is irradiated with ultraviolet rays having a wavelength of around 365 nm and the wavelength is irradiated in step (III). It is preferable to irradiate ultraviolet rays in the vicinity of 313 nm.
- ultraviolet rays in the vicinity of 254 nm in the step (II), ultraviolet rays in the vicinity of 313 nm in the step (III), ultraviolet rays in the vicinity of 313 nm in the step (II), and ultraviolet rays in the vicinity of 254 nm in the step (III) are preferable.
- the photoreaction state is changed between the air side and the substrate side of the single-layer retardation film, and further, the step (II) and the step (II).
- the polarized ultraviolet rays in the different polarization axis directions in the step (III) it is possible to obtain a single-layer retardation film having different orientation axes on the air side and the substrate side.
- the method for producing a single-layer retardation film of the present invention may include a step (IV) of heating the coating film obtained in the step (III). Orientation control ability can be imparted to the coating film by heating.
- a hot plate a heat circulation type oven, an IR (infrared) type oven, or the like can be used.
- the heating temperature can be determined in consideration of the temperature at which the liquid crystal property of the coating film to be used is developed, and the temperature at which the side chain type polymer contained in the polymerizable composition to be used develops liquid crystal property (hereinafter, liquid crystal expression). It is preferably within the temperature range of). In the case of a thin film surface such as a coating film, the liquid crystal development temperature on the coating film surface is expected to be lower than the liquid crystal development temperature when the side chain polymer is observed in bulk. Therefore, the heating temperature is more preferably within the temperature range of the liquid crystal development temperature on the surface of the coating film.
- the lower limit of the temperature range of the heating temperature after irradiation with polarized ultraviolet rays is 10 ° C lower than the lower limit of the temperature range of the liquid crystal development temperature of the side chain type polymer
- the upper limit is the temperature 10 ° C lower than the upper limit of the liquid crystal temperature range.
- the temperature in the range is preferable. If the heating temperature is lower than the temperature range, the effect of amplifying anisotropy due to heat in the coating film tends to be insufficient, and if the heating temperature is too high above the temperature range, the state of the coating film is in a state. Tends to be closer to an isotropic liquid state (isotropic phase), in which case self-assembly can make it difficult to reorient in one direction.
- the liquid crystal development temperature is equal to or higher than the liquid crystal transition temperature at which the surface of the polymer or the coating film undergoes a phase transition from the solid phase to the liquid crystal phase, and the isotropic phase undergoes a phase transition from the liquid crystal phase to the isotropic phase.
- exhibiting liquid crystallinity at 130 ° C. or lower means that the liquid crystal transition temperature at which a phase transition occurs from the solid phase to the liquid crystal phase is 130 ° C. or lower.
- the thickness of the single-layer retardation film produced by the production method of the present invention can be appropriately selected in consideration of the step of the substrate to be used and the optical and electrical properties, for example, 1.0 to 10 ⁇ m. Suitable.
- the single-layer retardation film obtained by the above-described manufacturing method is a material having optical properties suitable for applications such as display devices and recording materials, and in particular, polarizing plates and retardation plates for organic EL and liquid crystal displays. It is suitable as an optical compensation film for the like.
- the monomers MA1, MA2 and MA3 having photoreactive groups and the monomer MB1 having liquid crystallinity used in the examples are shown below.
- MA1 was synthesized according to the synthetic method described in International Publication No. 2011/0854546.
- MA2 was synthesized according to the synthetic method described in JP-A-2010-18807.
- MA3 was synthesized according to the synthetic method described in JP2012-27354.
- MB1 was synthesized according to the synthesis method described in JP-A-9-118717.
- MC1 was purchased from Tokyo Chemical Industry Co., Ltd.
- the side chain derived from MA1, MA2 and MA3 corresponds to the side chain a
- the side chain derived from MB1 corresponds to the side chain b.
- MC1 corresponds to the other side chain.
- NMP (0.97 g), BCS (8.73 g) and R40 (7.3 mg) were added to the polymer solution P2 (48.5 g) and stirred to obtain the polymer solution T2.
- This polymer solution T2 was used as it was as a material for forming a retardation film.
- NMP (1.03 g), BCS (9.22 g) and R40 (7.7 mg) were added to the polymer solution P3 (51.2 g) and stirred to obtain a polymer solution T3.
- This polymer solution T3 was used as it was as a material for forming a retardation film.
- NMP (0.40 g), BCS (3.60 g) and R40 (3.0 mg) were added to the polymer solution P4 (20.0 g) and stirred to obtain a polymer solution T4.
- This polymer solution T4 was used as it was as a material for forming a retardation film.
- Example 1 Manufacture of Single-Layer Rethinking Film
- the polymer solution T1 was filtered through a filter having a pore size of 5.0 ⁇ m, spin-coated on a non-alkali glass substrate, and dried on a hot plate at 60 ° C. for 4 minutes to form a retardation film having a film thickness of 5.0 ⁇ m.
- the coating film surface was irradiated with ultraviolet rays having a wavelength of 313 nm (313 nm bandpass filter) at 20 mJ / cm 2 from the air side via a polarizing plate.
- Examples 2 to 11 The substrates S2 to S11 with the retardation film were produced by the same method as in Example 1 except that the exposure conditions for the first or second exposure were changed. Detailed conditions are summarized in Table 1. In the exposure conditions shown in Table 1, 313BPF is a 313nm bandpass filter and 365BPF is a 365nm bandpass filter.
- Example 12 The polymer solution T2 was filtered through a filter having a pore size of 5.0 ⁇ m, spin-coated on a non-alkali glass substrate, and dried on a hot plate at 80 ° C. for 2 minutes to form a retardation film having a film thickness of 5.0 ⁇ m. Next, the coating film surface was irradiated with ultraviolet rays having a wavelength of 313 nm (313 nm bandpass filter) at 20 mJ / cm 2 from the air side via a polarizing plate.
- Example 13 A substrate S13 with a retardation film was produced in the same manner as in Example 12 except that the first exposure condition was changed. Detailed conditions are summarized in Table 1.
- Example 14 The polymer solution T3 was filtered through a filter having a pore size of 5.0 ⁇ m, spin-coated on a non-alkali glass substrate, and dried on a hot plate at 80 ° C. for 2 minutes to form a retardation film having a film thickness of 5.0 ⁇ m. Next, the coating film surface was irradiated with ultraviolet rays having a wavelength of 313 nm (313 nm bandpass filter) at 50 mJ / cm 2 from the air side via a polarizing plate.
- Example 15 to 16 The substrates S15 to S16 with the retardation film were produced in the same manner as in Example 14 except that the second exposure condition was changed. Detailed conditions are summarized in Table 1.
- Example 17 The polymer solution T4 was filtered through a filter having a pore size of 5.0 ⁇ m, spin-coated on a non-alkali glass substrate, and dried on a hot plate at 80 ° C. for 2 minutes to form a retardation film having a film thickness of 6.0 ⁇ m. Next, the coating film surface was irradiated with ultraviolet rays having a wavelength of 313 nm (313 nm bandpass filter) at 70 mJ / cm 2 from the air side via a polarizing plate.
- IR infrared
- Example 18 and 19 The substrates S18 and S19 with the retardation film were produced in the same manner as in Example 17 except that the first or second exposure conditions were changed. Detailed conditions are summarized in Table 1.
- Example 20 After filtering the polymer solution T1 with a filter having a pore size of 5.0 ⁇ m, the polymer solution T1 was spin-coated on a cycloolefin polymer (COP) film (manufactured by Nippon Zeon Co., Ltd.) attached to a glass substrate via double-sided tape at 60 ° C. It was dried on a hot plate for 4 minutes to form a retardation film having a thickness of 5.0 ⁇ m. After temporary drying, the COP film was peeled off from the double-sided tape to obtain a polymer-coated COP film.
- COP cycloolefin polymer
- the coating film surface was irradiated with ultraviolet rays having a wavelength of 313 nm (313 nm bandpass filter) at 50 mJ / cm 2 from the air side via a polarizing plate.
- the polarization axis direction of the first polarized ultraviolet light was set to 0 °, and the substrate was rotated horizontally by 60 ° with respect to the polarization axis direction.
- the mixture was heated in a circulating oven at 140 ° C. for 20 minutes to prepare a COP film S20 with a retardation film.
- the substrate R1 with a retardation film was prepared by heating in a circulating oven at 140 ° C. for 20 minutes.
- the substrate R2 with a retardation film was prepared by heating in a circulating oven at 110 ° C. for 20 minutes.
- ultraviolet rays having a wavelength of 365 nm were irradiated from the air side through the polarizing plate at 50 mJ / cm 2 .
- the substrate was heated in a circulating oven at 130 ° C. for 20 minutes to prepare a substrate R3 with a retardation film.
- the retardation values and wavelength dispersions of the substrates S1 to S20 produced in the examples and the substrates R1 to R3 produced in the comparative examples were evaluated by the following methods.
- Wavelength dispersion Re [450] / Re [550] (Re [450] represents a linear phase difference at a wavelength of 450 nm, and Re [550] represents a linear phase difference at a wavelength of 550 nm.)
- Table 2 The results of the phase difference evaluation are summarized in Table 2 below. Further, FIG. 1 shows the relationship between the linear retardation (Linear Re) of the substrate with the retardation film obtained in Example 7 and the wavelength.
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Abstract
Description
1.(I)紫外線で光反応する光反応性部位を側鎖に有する重合体を含む単層位相差膜形成用重合体組成物を基板上に塗布し、乾燥して塗膜を形成する工程、
(II)前記塗膜に、第1の偏光紫外線を照射する第1の露光工程、及び
(III)前記偏光紫外線を照射した塗膜に、更に、第1の偏光紫外線を照射した面と同一面に、第1の偏光紫外線と偏光軸方向が異なる第2の偏光紫外線を照射する第2の露光工程
を含む単層位相差膜の製造方法。
2.更に、(IV)工程(III)で得られた塗膜を加熱する工程を含む1の単層位相差膜の製造方法。
3.工程(II)及び(III)において、偏光紫外線を塗膜と空気との界面側から照射する1又は2の単層位相差膜の製造方法。
4.前記紫外線で光反応する光反応性部位を有する側鎖が、下記式(a1)~(a6)のいずれかで表される1~3のいずれかの単層位相差膜の製造方法。
Lは、単結合又は炭素数1~12のアルキレン基であり、該アルキレン基の水素原子の一部又は全部がハロゲン原子で置換されていてもよい。
T1は、単結合又は炭素数1~12のアルキレン基であり、該アルキレン基の水素原子の一部又は全部がハロゲン原子で置換されていてもよい。
A1、A2及びD1は、それぞれ独立に、単結合、-O-、-CH2-、-C(=O)-O-、-O-C(=O)-、-C(=O)-NH-又は-NH-C(=O)-である。ただし、T1が単結合のときは、A2も単結合である。
Y1及びY2は、フェニレン基又はナフチレン基であり、該フェニレン基及びナフチレン基の水素原子の一部又は全部が、シアノ基、ハロゲン原子、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基又は炭素数1~5のアルコキシ基で置換されていてもよい。
P1、Q1及びQ2は、それぞれ独立に、単結合、フェニレン基又は炭素数5~8の2価の脂環式炭化水素基であり、該フェニレン基の水素原子の一部又は全部が、シアノ基、ハロゲン原子、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基又は炭素数1~5のアルコキシ基で置換されていてもよい。Q1の数が2のとき、各Q1は互いに同一でも異なっていてもよく、Q2の数が2のとき、各Q2は互いに同一でも異なっていてもよい。
Rは、水素原子、シアノ基、ハロゲン原子、カルボキシ基、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基、炭素数3~7のシクロアルキル基又は炭素数1~5のアルコキシ基である。
X1及びX2は、それぞれ独立に、単結合、-O-、-C(=O)-O-、-O-C(=O)-、-N=N-、-CH=CH-、-C≡C-、-CH=CH-C(=O)-O-又は-O-C(=O)-CH=CH-である。X1の数が2のとき、各X1は互いに同一でも異なっていてもよく、X2の数が2のとき、各X2は互いに同一でも異なっていてもよい。
Couは、クマリン-6-イル基又はクマリン-7-イル基であり、これらに結合する水素原子の一部が-NO2、-CN、-CH=C(CN)2、-CH=CH-CN、ハロゲン原子、炭素数1~5のアルキル基又は炭素数1~5のアルコキシ基で置換されてもよい。
Eは、-C(=O)-O-、-O-C(=O)-、-C(=O)-S-又は-S-C(=O)-である。
G1及びG2は、それぞれ独立に、N又はCHである。
破線は、結合手である。)
5.前記重合体が、更に光二量化も光異性化もしない側鎖を有する1~4のいずれかの単層位相差膜の製造方法。
6.前記光二量化も光異性化もしない側鎖が、更に、下記式(b1)~(b11)のいずれかで表されるものである5の単層位相差膜の製造方法。
R1は、-NO2、-CN、ハロゲン原子、フェニル基、ナフチル基、ビフェニリル基、フラニル基、1価窒素含有複素環基、炭素数5~8の1価脂環式炭化水素基、炭素数1~12のアルキル基又は炭素数1~12のアルコキシ基である。
R2は、フェニル基、ナフチル基、ビフェニリル基、フラニル基、1価窒素含有複素環基又は炭素数5~8の1価脂環式炭化水素基であり、これらの基の水素原子の一部又は全部が、-NO2、-CN、ハロゲン原子、炭素数1~5のアルキル基又は炭素数1~5のアルコキシ基で置換されてもよい。
R3は、水素原子、-NO2、-CN、ハロゲン原子、フェニル基、ナフチル基、ビフェニリル基、フラニル基、1価窒素含有複素環基、炭素数5~8の1価脂環式炭化水素基、炭素数1~12のアルキル基又は炭素数1~12のアルコキシ基である。
Eは、-C(=O)-O-、-O-C(=O)-、-C(=O)-S-又は-S-C(=O)-である。
aは、1~12の整数である。
k1~k5は、それぞれ独立に、0~2の整数であるが、k1~k5の合計は2以上である。
k6及びk7は、それぞれ独立に、0~2の整数であるが、k6及びk7の合計は1以上である。
m1、m2及びm3は、それぞれ独立に、1~3の整数である。
nは、0又は1である。
Z1及びZ2は、それぞれ独立に、単結合、-C(=O)-、-CH2-O-、又は-CF2-である。
破線は、結合手である。
また、式中のベンゼン環及びナフタレン環の水素原子の一部又は全部が、シアノ基、ハロゲン原子、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基又は炭素数1~5のアルコキシ基で置換されていてもよい。)
7.紫外線で光反応する光反応性部位を側鎖に有する重合体を含む単層位相差膜形成用重合体組成物であって、
(I)前記組成物を基板上に塗布し、乾燥して塗膜を形成する工程、(II)前記塗膜に、第1の偏光紫外線を照射する第1の露光工程、及び(III)前記偏光紫外線を照射した塗膜に、更に、第1の偏光紫外線を照射した面と同一面に、第1の偏光紫外線と偏光軸方向が異なる第2の偏光紫外線を照射する第2の露光工程によって、波長分散がフラット分散又は逆波長分散を示す単層位相差膜を与える単層位相差膜形成用重合体組成物。
8.前記紫外線で光反応する光反応性部位を有する側鎖が、下記式(a1)~(a6)のいずれかで表される7の単層位相差膜形成用重合体組成物。
Lは、単結合又は炭素数1~12のアルキレン基であり、該アルキレン基の水素原子の一部又は全部がハロゲン原子で置換されていてもよい。
T1は、単結合又は炭素数1~12のアルキレン基であり、該アルキレン基の水素原子の一部又は全部がハロゲン原子で置換されていてもよい。
A1、A2及びD1は、それぞれ独立に、単結合、-O-、-CH2-、-C(=O)-O-、-O-C(=O)-、-C(=O)-NH-又は-NH-C(=O)-である。ただし、T1が単結合のときは、A2も単結合である。
Y1及びY2は、フェニレン基又はナフチレン基であり、該フェニレン基及びナフチレン基の水素原子の一部又は全部が、シアノ基、ハロゲン原子、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基又は炭素数1~5のアルコキシ基で置換されていてもよい。
P1、Q1及びQ2は、それぞれ独立に、単結合、フェニレン基又は炭素数5~8の2価の脂環式炭化水素基であり、該フェニレン基の水素原子の一部又は全部が、シアノ基、ハロゲン原子、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基又は炭素数1~5のアルコキシ基で置換されていてもよい。Q1の数が2のとき、各Q1は互いに同一でも異なっていてもよく、Q2の数が2のとき、各Q2は互いに同一でも異なっていてもよい。
Rは、水素原子、シアノ基、ハロゲン原子、カルボキシ基、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基、炭素数3~7のシクロアルキル基又は炭素数1~5のアルコキシ基である。
X1及びX2は、それぞれ独立に、単結合、-O-、-C(=O)-O-、-O-C(=O)-、-N=N-、-CH=CH-、-C≡C-、-CH=CH-C(=O)-O-又は-O-C(=O)-CH=CH-である。X1の数が2のとき、各X1は互いに同一でも異なっていてもよく、X2の数が2のとき、各X2は互いに同一でも異なっていてもよい。
Couは、クマリン-6-イル基又はクマリン-7-イル基であり、これらに結合する水素原子の一部が-NO2、-CN、-CH=C(CN)2、-CH=CH-CN、ハロゲン原子、炭素数1~5のアルキル基又は炭素数1~5のアルコキシ基で置換されてもよい。
Eは、-C(=O)-O-、-O-C(=O)-、-C(=O)-S-又は-S-C(=O)-である。
G1及びG2は、それぞれ独立に、N又はCHである。
破線は、結合手である。)
9.前記重合体が、更に光二量化も光異性化もしない側鎖を有する8の単層位相差膜形成用重合体組成物。
10.前記光二量化も光異性化もしない側鎖が、更に、下記式(b1)~(b11)のいずれかで表されるものである9の単層位相差膜形成用重合体組成物。
R1は、-NO2、-CN、ハロゲン原子、フェニル基、ナフチル基、ビフェニリル基、フラニル基、1価窒素含有複素環基、炭素数5~8の1価脂環式炭化水素基、炭素数1~12のアルキル基又は炭素数1~12のアルコキシ基である。
R2は、フェニル基、ナフチル基、ビフェニリル基、フラニル基、1価窒素含有複素環基又は炭素数5~8の1価脂環式炭化水素基であり、これらの基の水素原子の一部又は全部が、-NO2、-CN、ハロゲン原子、炭素数1~5のアルキル基又は炭素数1~5のアルコキシ基で置換されてもよい。
R3は、水素原子、-NO2、-CN、ハロゲン原子、フェニル基、ナフチル基、ビフェニリル基、フラニル基、1価窒素含有複素環基、炭素数5~8の1価脂環式炭化水素基、炭素数1~12のアルキル基又は炭素数1~12のアルコキシ基である。
Eは、-C(=O)-O-、-O-C(=O)-、-C(=O)-S-又は-S-C(=O)-である。
aは、1~12の整数である。
k1~k5は、それぞれ独立に、0~2の整数であるが、k1~k5の合計は2以上である。
k6及びk7は、それぞれ独立に、0~2の整数であるが、k6及びk7の合計は1以上である。
m1、m2及びm3は、それぞれ独立に、1~3の整数である。
nは、0又は1である。
Z1及びZ2は、それぞれ独立に、単結合、-C(=O)-、-CH2-O-、又は-CF2-である。
破線は、結合手である。
また、式中のベンゼン環及びナフタレン環の水素原子の一部又は全部が、シアノ基、ハロゲン原子、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基又は炭素数1~5のアルコキシ基で置換されていてもよい。)
(I)単層位相差膜形成用重合体組成物を基板上に塗布し、乾燥して塗膜を形成する工程、
(II)前記塗膜に、第1の偏光紫外線を照射する第1の露光工程、及び
(III)前記偏光紫外線を照射した塗膜に、更に、第1の偏光紫外線を照射した面と同一面に、第1の偏光紫外線と偏光軸方向が異なる第2の偏光紫外線を照射する第2の露光工程
を含むことを特徴とする。なお、本発明において偏光軸方向とは、偏光紫外線の振動方向と同義である。
工程(I)は、単層位相差膜形成用重合体組成物を基板上に塗布し、乾燥して塗膜を形成する工程である。より具体的には、前記重合体組成物を基板(例えば、シリコン/二酸化シリコン被覆基板、シリコンナイトライド基板、金属、例えば、アルミニウム、モリブデン、クロム等が被覆された基板、ガラス基板、石英基板、ITO基板、透明フィルム(トリアセチルセルロース(TAC)フィルム、シクロオレフィンポリマーフィルム、ポリエチレンテレフタレートフィルム、アクリルフィルム等の樹脂フィルム))の上に、バーコート、スピンコート、フローコート、ロールコート、スリットコート、スリットコートに続いたスピンコート、インクジェット法、印刷法等の方法によって塗布する。塗布した後、自然乾燥したり、ホットプレート、熱循環型オーブン、IR(赤外線)型オーブン等の加熱手段により加熱したりして、溶媒を蒸発させて塗膜を得ることができる。加熱手段により加熱する場合、その温度は特に限定されないが、30~200℃が好ましく、30~150℃がより好ましい。
本発明の単層位相差膜形成用重合体組成物は、紫外線で光反応する光反応性部位を側鎖に有する重合体を含むものであり、具体的には、液晶性を発現し得る感光性の側鎖型重合体又は液晶性側鎖重合体と感光性側鎖重合体とを個別に有する混合側鎖型重合体(以下、単に側鎖型重合体ともいう。)を含むものである。前記組成物から得られる塗膜も、液晶性と感光性とを含む側鎖型重合体を有する膜である。この塗膜にはラビング処理を行うこと無く、偏光照射によって配向処理を行う。そして、偏光照射の後、その側鎖型重合体膜を加熱する工程を経て、光学異方性が付与されたフィルム(単層位相差膜)となる。このとき、偏光照射によって発現した僅かな異方性がドライビングフォースとなり、側鎖型重合体自体が自己組織化により効率的に再配向する。その結果、単層位相差膜として高効率な配向処理が実現し、高い光学異方性が付与された単層位相差膜を得ることができる。
工程(II)は、前記塗膜に第1の偏光紫外線を照射する工程(第1の露光工程)である。前記塗膜の膜面に偏光紫外線を照射する場合、基板に対して一定の方向から偏光板を介して偏光紫外線を照射する。
工程(III)は、前記偏光紫外線を照射した塗膜に、更に第1の偏光紫外線と偏光軸方向が異なる第2の偏光紫外線を照射する工程(第2の露光工程)である。第2の偏光紫外線は、その偏光軸方向と第1の偏光紫外線の偏光軸方向とがなす角度が、10~80°又は100~170°となるものが好ましく、20~70°又は110~160°となるものがより好ましく、40~70°又は110~140°となるものが更に好ましい。
本発明の単層位相差膜の製造方法は、工程(III)で得られた塗膜を加熱する工程(IV)を備えていてもよい。加熱により、塗膜に配向制御能を付与することができる。
(有機溶媒)
NMP:N-メチル-2-ピロリドン
BCS:ブチルセロソルブ
(重合開始剤)
AIBN:2,2’-アゾビスイソブチロニトリル
(界面活性剤)
R40:メガファックR-40(DIC社製)
[合成例1]
NMP(336g)中に、MA1(36.6g、0.11mol)、MB1(191g、0.62mol)及びAIBN(12.1g、0.073mol)を溶解させ、モノマー混合溶液を調製した。窒素雰囲気下、60℃で、NMP(224g)中にモノマー混合溶液を2時間かけて滴下した。滴下後、60℃で8時間反応させ、ポリマー溶液P1を得た。
NMP(30.7g)中に、MA2(2.60g、7.5mmol)、MB1(13.0g、42.4mmol)及びAIBN(0.821g、5.00mmol)を溶解させ、モノマー混合溶液を調製した。窒素雰囲気下、60℃で、NMP(7.67g)中にモノマー混合溶液を2時間かけて滴下した。滴下後、60℃で20時間反応させ、ポリマー溶液P2を得た。
NMP(32.0g)中に、MA3(3.29g、7.5mmol)、MB1(13.0g、42.4mmol)及びAIBN(0.821g、5.00mmol)を溶解させ、モノマー混合溶液を調製した。窒素雰囲気下、60℃で、NMP(7.99g)中にモノマー混合溶液を2時間かけて滴下した。滴下後、60℃で20時間反応させ、ポリマー溶液P3を得た。
NMP(11.8g)中に、MA1(0.997g、3.0mmol)、MB1(4.60g、15.0mmol)、MC1(0.376g、2.0mmol)及びAIBN(0.328g、2.00mmol)を溶解させ、モノマー混合溶液を調製した。窒素雰囲気下、60℃で、NMP(2.94g)中にモノマー混合溶液を2時間かけて滴下した。滴下後、60℃で20時間反応させ、ポリマー溶液P4を得た。
[調製例1]
ポリマー溶液P1(208g)に、NMP(4.47g)、BCS(37.5g)及びR40(0.031g)を加えて撹拌することで、ポリマー溶液T1を得た。このポリマー溶液T1は、そのまま位相差膜を形成するための材料とした。
ポリマー溶液P2(48.5g)に、NMP(0.97g)、BCS(8.73g)及びR40(7.3mg)を加えて撹拌することで、ポリマー溶液T2を得た。このポリマー溶液T2は、そのまま位相差膜を形成するための材料とした。
ポリマー溶液P3(51.2g)に、NMP(1.03g)、BCS(9.22g)及びR40(7.7mg)を加えて撹拌することで、ポリマー溶液T3を得た。このポリマー溶液T3は、そのまま位相差膜を形成するための材料とした。
ポリマー溶液P4(20.0g)に、NMP(0.40g)、BCS(3.60g)及びR40(3.0mg)を加えて撹拌することで、ポリマー溶液T4を得た。このポリマー溶液T4は、そのまま位相差膜を形成するための材料とした。
[実施例1]
ポリマー溶液T1を孔径5.0μmのフィルターで濾過した後、無アルカリガラス基板上にスピンコートし、60℃のホットプレート上で4分間乾燥し、膜厚5.0μmの位相差膜を形成した。次いで、偏光板を介して波長313nmの紫外線(313nmバンドパスフィルタ)を20mJ/cm2で塗膜面に空気側から照射した。続いて、1回目の偏光紫外線の偏光軸方向を0°とし、それに対して基板を水平に50°回転させた。そして、偏光板を介して空気側から波長365nm(365nmバンドパスフィルタ)の紫外線を100mJ/cm2照射した(1回目の偏光軸方向と2回目の偏光軸方向の成す角度=50°)。2回の偏光紫外線照射後、140℃の循環式オーブンで20分間加熱し、位相差膜付きの基板S1を作製した。
1回目又は2回目の露光条件を変更した以外は、実施例1と同様の方法で、位相差膜付きの基板S2~S11を作製した。詳細な条件は、表1にまとめた。表1の露光条件において、313BPFは313nmバンドパスフィルタ、365BPFは365nmバンドパスフィルタである。
ポリマー溶液T2を孔径5.0μmのフィルターで濾過した後、無アルカリガラス基板上にスピンコートし、80℃のホットプレート上で2分間乾燥し、膜厚5.0μmの位相差膜を形成した。次いで、偏光板を介して波長313nmの紫外線(313nmバンドパスフィルタ)を20mJ/cm2で塗膜面に空気側から照射した。続いて、1回目の偏光紫外線の偏光軸方向を0°とし、それに対して基板を水平に60°回転させた。そして、偏光板を介して空気側から波長365nm(365nmバンドパスフィルタ)の紫外線を400mJ/cm2照射した(1回目の偏光軸方向と2回目の偏光軸方向の成す角度=60°)。2回の偏光紫外線照射後、110℃の循環式オーブンで20分間加熱し、位相差膜付きの基板S12を作製した。
1回目の露光条件を変更した以外は、実施例12と同様の方法で、位相差膜付きの基板S13を作製した。詳細な条件は、表1にまとめた。
ポリマー溶液T3を孔径5.0μmのフィルターで濾過した後、無アルカリガラス基板上にスピンコートし、80℃のホットプレート上で2分間乾燥し、膜厚5.0μmの位相差膜を形成した。次いで、偏光板を介して波長313nmの紫外線(313nmバンドパスフィルタ)を50mJ/cm2で塗膜面に空気側から照射した。続いて、1回目の偏光紫外線の偏光軸方向を0°とし、それに対して基板を水平に60°回転させた。そして、偏光板を介して空気側から波長365nm(365nmバンドパスフィルタ)の紫外線を50mJ/cm2照射した(1回目の偏光軸方向と2回目の偏光軸方向の成す角度=60°)。2回の偏光紫外線照射後、130℃の循環式オーブンで20分間加熱し、位相差膜付きの基板S14を作製した。
2回目の露光条件を変更した以外は、実施例14と同様の方法で、位相差膜付きの基板S15~S16を作製した。詳細な条件は、表1にまとめた。
ポリマー溶液T4を孔径5.0μmのフィルターで濾過した後、無アルカリガラス基板上にスピンコートし、80℃のホットプレート上で2分間乾燥し、膜厚6.0μmの位相差膜を形成した。次いで、偏光板を介して波長313nmの紫外線(313nmバンドパスフィルタ)を70mJ/cm2で塗膜面に空気側から照射した。続いて、1回目の偏光紫外線の偏光軸方向を0°とし、それに対して基板を水平に50°回転させた。そして、偏光板を介して空気側から波長365nm(365nmバンドパスフィルタ)の紫外線を50mJ/cm2照射した(1回目の偏光軸方向と2回目の偏光軸方向の成す角度=50°)。2回の偏光紫外線照射後、120℃のIR(赤外線)型オーブンで20分間加熱し、位相差膜付きの基板S17を作製した。
1回目又は2回目の露光条件を変更した以外は、実施例17と同様の方法で、位相差膜付きの基板S18、S19を作製した。詳細な条件は、表1にまとめた。
ポリマー溶液T1を孔径5.0μmのフィルターで濾過した後、ガラス基板に両面テープを介して貼り付けたシクロオレフィンポリマー(COP)フィルム(日本ゼオン(株)製)上にスピンコートし、60℃のホットプレート上で4分間乾燥し、膜厚5.0μmの位相差膜を形成した。仮乾燥後、COPフィルムを両面テープから剥がし、ポリマー塗布されたCOPフィルムを得た。次いで、偏光板を介して波長313nmの紫外線(313nmバンドパスフィルタ)を50mJ/cm2で塗膜面に空気側から照射した。続いて、1回目の偏光紫外線の偏光軸方向を0°とし、それに対して基板を水平に60°回転させた。そして、偏光板を介して空気側から波長365nm(365nmバンドパスフィルタ)の紫外線を100mJ/cm2照射した(1回目の偏光軸方向と2回目の偏光軸方向の成す角度=60°)。2回の偏光紫外線照射後、140℃の循環式オーブンで20分間加熱し、位相差膜付きのCOPフィルムS20を作製した。
ポリマー溶液T1を孔径5.0μmのフィルターで濾過した後、無アルカリガラス基板上にスピンコートし、60℃のホットプレート上で4分間乾燥し、膜厚5.0μmの位相差膜を形成した。次いで、偏光板を介して波長313nmの紫外線(313nmバンドパスフィルタ)を20mJ/cm2で塗膜面に空気側から照射した。続いて、1回目の偏光紫外線の偏光軸方向と2回目の偏光軸方向が一致するように基板角度を調整した。そして、偏光板を介して空気側から波長365nm(365nmバンドパスフィルタ)の紫外線を100mJ/cm2照射した。2回の偏光紫外線照射後、140℃の循環式オーブンで20分間加熱し、位相差膜付きの基板R1を作製した。
ポリマー溶液T2を孔径5.0μmのフィルターで濾過した後、無アルカリガラス基板上にスピンコートし、80℃のホットプレート上で2分間乾燥し、膜厚5.0μmの位相差膜を形成した。次いで、偏光板を介して波長313nmの紫外線(313nmバンドパスフィルタ)を20mJ/cm2で塗膜面に空気側から照射した。続いて、1回目の偏光紫外線の偏光軸方向と2回目の偏光軸方向が一致するように基板角度を調整した。そして、偏光板を介して空気側から波長365nm(365nmバンドパスフィルタ)の紫外線を400mJ/cm2照射した。2回の偏光紫外線照射後、110℃の循環式オーブンで20分間加熱し、位相差膜付きの基板R2を作製した。
ポリマー溶液T3を孔径5.0μmのフィルターで濾過した後、無アルカリガラス基板上にスピンコートし、80℃のホットプレート上で2分間乾燥し、膜厚5.0μmの位相差膜を形成した。次いで、偏光板を介して波長313nmの紫外線(313nmバンドパスフィルタ)を50mJ/cm2で塗膜面に空気側から照射した。続いて、1回目の偏光紫外線の偏光軸方向と2回目の偏光軸方向が一致するように基板角度を調整した。そして、偏光板を介して空気側から波長365nm(365nmバンドパスフィルタ)の紫外線を50mJ/cm2照射した。2回の偏光紫外線照射後、130℃の循環式オーブンで20分間加熱し、位相差膜付きの基板R3を作製した。
(1)位相差評価
Axometrics社製のAxo Scanを用いて、波長550nmにおける直線位相差(Linear Re)と円位相差(Circular Re)を評価した。また、測定波長が450nmにおける直線位相差(Linear Re)を測定し、下記式により波長分散性を評価した。この値が小さいほど正分散が抑制されており、1.00未満であれば逆波長分散性を示している。
波長分散=Re[450]/Re[550]
(Re[450]は波長450nmにおける直線位相差を表し、Re[550]は波長550nmにおける直線位相差を表す。)
下記表2に位相差評価の結果をまとめて示す。また、実施例7で得られた位相差膜付きの基板の直線位相差(Linear Re)と波長の関係を図1に示す。
実施例5と実施例11を比較すると、実施例5は逆波長分散を示したが、実施例11は正分散であった。したがって、基板側から2回露光するよりも空気側から2回露光する方が、正分散抑制効果が大きいことが示唆された。
反射板(クロム板)上に位相差膜付きの基板を塗膜面が反射板側となるように積層し、その上に直線偏光板を積層して、目視による反射色を観察した。その結果、比較例1の基板からの反射色は青色を示したのに対し、実施例7の基板からの反射色は黒色に近い反射色を示した。したがって、本プロセスにより作製した位相差膜は、有機EL表示素子等の反射防止用途向けの位相差膜として応用することができる。
Claims (10)
- (I)紫外線で光反応する光反応性部位を側鎖に有する重合体を含む単層位相差膜形成用重合体組成物を基板上に塗布し、乾燥して塗膜を形成する工程、
(II)前記塗膜に、第1の偏光紫外線を照射する第1の露光工程、及び
(III)前記偏光紫外線を照射した塗膜に、更に、第1の偏光紫外線を照射した面と同一面に、第1の偏光紫外線と偏光軸方向が異なる第2の偏光紫外線を照射する第2の露光工程
を含む単層位相差膜の製造方法。 - 更に、(IV)工程(III)で得られた塗膜を加熱する工程を含む請求項1記載の単層位相差膜の製造方法。
- 工程(II)及び(III)において、偏光紫外線を塗膜と空気との界面側から照射する請求項1又は2記載の単層位相差膜の製造方法。
- 前記紫外線で光反応する光反応性部位を有する側鎖が、下記式(a1)~(a6)のいずれかで表される請求項1~3のいずれか1項記載の単層位相差膜の製造方法。
Lは、単結合又は炭素数1~12のアルキレン基であり、該アルキレン基の水素原子の一部又は全部がハロゲン原子で置換されていてもよい。
T1は、単結合又は炭素数1~12のアルキレン基であり、該アルキレン基の水素原子の一部又は全部がハロゲン原子で置換されていてもよい。
A1、A2及びD1は、それぞれ独立に、単結合、-O-、-CH2-、-C(=O)-O-、-O-C(=O)-、-C(=O)-NH-又は-NH-C(=O)-である。ただし、T1が単結合のときは、A2も単結合である。
Y1及びY2は、フェニレン基又はナフチレン基であり、該フェニレン基及びナフチレン基の水素原子の一部又は全部が、シアノ基、ハロゲン原子、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基又は炭素数1~5のアルコキシ基で置換されていてもよい。
P1、Q1及びQ2は、それぞれ独立に、単結合、フェニレン基又は炭素数5~8の2価の脂環式炭化水素基であり、該フェニレン基の水素原子の一部又は全部が、シアノ基、ハロゲン原子、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基又は炭素数1~5のアルコキシ基で置換されていてもよい。Q1の数が2のとき、各Q1は互いに同一でも異なっていてもよく、Q2の数が2のとき、各Q2は互いに同一でも異なっていてもよい。
Rは、水素原子、シアノ基、ハロゲン原子、カルボキシ基、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基、炭素数3~7のシクロアルキル基又は炭素数1~5のアルコキシ基である。
X1及びX2は、それぞれ独立に、単結合、-O-、-C(=O)-O-、-O-C(=O)-、-N=N-、-CH=CH-、-C≡C-、-CH=CH-C(=O)-O-又は-O-C(=O)-CH=CH-である。X1の数が2のとき、各X1は互いに同一でも異なっていてもよく、X2の数が2のとき、各X2は互いに同一でも異なっていてもよい。
Couは、クマリン-6-イル基又はクマリン-7-イル基であり、これらに結合する水素原子の一部が-NO2、-CN、-CH=C(CN)2、-CH=CH-CN、ハロゲン原子、炭素数1~5のアルキル基又は炭素数1~5のアルコキシ基で置換されてもよい。
Eは、-C(=O)-O-、-O-C(=O)-、-C(=O)-S-又は-S-C(=O)-である。
G1及びG2は、それぞれ独立に、N又はCHである。
破線は、結合手である。) - 前記重合体が、更に光二量化も光異性化もしない側鎖を有する請求項1~4のいずれか1項記載の単層位相差膜の製造方法。
- 前記光二量化も光異性化もしない側鎖が、更に、下記式(b1)~(b11)のいずれかで表されるものである請求項5記載の単層位相差膜の製造方法。
R1は、-NO2、-CN、ハロゲン原子、フェニル基、ナフチル基、ビフェニリル基、フラニル基、1価窒素含有複素環基、炭素数5~8の1価脂環式炭化水素基、炭素数1~12のアルキル基又は炭素数1~12のアルコキシ基である。
R2は、フェニル基、ナフチル基、ビフェニリル基、フラニル基、1価窒素含有複素環基又は炭素数5~8の1価脂環式炭化水素基であり、これらの基の水素原子の一部又は全部が、-NO2、-CN、ハロゲン原子、炭素数1~5のアルキル基又は炭素数1~5のアルコキシ基で置換されてもよい。
R3は、水素原子、-NO2、-CN、ハロゲン原子、フェニル基、ナフチル基、ビフェニリル基、フラニル基、1価窒素含有複素環基、炭素数5~8の1価脂環式炭化水素基、炭素数1~12のアルキル基又は炭素数1~12のアルコキシ基である。
Eは、-C(=O)-O-、-O-C(=O)-、-C(=O)-S-又は-S-C(=O)-である。
aは、1~12の整数である。
k1~k5は、それぞれ独立に、0~2の整数であるが、k1~k5の合計は2以上である。
k6及びk7は、それぞれ独立に、0~2の整数であるが、k6及びk7の合計は1以上である。
m1、m2及びm3は、それぞれ独立に、1~3の整数である。
nは、0又は1である。
Z1及びZ2は、それぞれ独立に、単結合、-C(=O)-、-CH2-O-、又は-CF2-である。
破線は、結合手である。
また、式中のベンゼン環及びナフタレン環の水素原子の一部又は全部が、シアノ基、ハロゲン原子、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基又は炭素数1~5のアルコキシ基で置換されていてもよい。) - 紫外線で光反応する光反応性部位を側鎖に有する重合体を含む単層位相差膜形成用重合体組成物であって、
(I)前記組成物を基板上に塗布し、乾燥して塗膜を形成する工程、(II)前記塗膜に、第1の偏光紫外線を照射する第1の露光工程、及び(III)前記偏光紫外線を照射した塗膜に、更に、第1の偏光紫外線を照射した面と同一面に、第1の偏光紫外線と偏光軸方向が異なる第2の偏光紫外線を照射する第2の露光工程によって、波長分散がフラット分散又は逆波長分散を示す単層位相差膜を与える単層位相差膜形成用重合体組成物。 - 前記紫外線で光反応する光反応性部位を有する側鎖が、下記式(a1)~(a6)のいずれかで表される請求項7記載の単層位相差膜形成用重合体組成物。
Lは、単結合又は炭素数1~12のアルキレン基であり、該アルキレン基の水素原子の一部又は全部がハロゲン原子で置換されていてもよい。
T1は、単結合又は炭素数1~12のアルキレン基であり、該アルキレン基の水素原子の一部又は全部がハロゲン原子で置換されていてもよい。
A1、A2及びD1は、それぞれ独立に、単結合、-O-、-CH2-、-C(=O)-O-、-O-C(=O)-、-C(=O)-NH-又は-NH-C(=O)-である。ただし、T1が単結合のときは、A2も単結合である。
Y1及びY2は、フェニレン基又はナフチレン基であり、該フェニレン基及びナフチレン基の水素原子の一部又は全部が、シアノ基、ハロゲン原子、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基又は炭素数1~5のアルコキシ基で置換されていてもよい。
P1、Q1及びQ2は、それぞれ独立に、単結合、フェニレン基又は炭素数5~8の2価の脂環式炭化水素基であり、該フェニレン基の水素原子の一部又は全部が、シアノ基、ハロゲン原子、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基又は炭素数1~5のアルコキシ基で置換されていてもよい。Q1の数が2のとき、各Q1は互いに同一でも異なっていてもよく、Q2の数が2のとき、各Q2は互いに同一でも異なっていてもよい。
Rは、水素原子、シアノ基、ハロゲン原子、カルボキシ基、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基、炭素数3~7のシクロアルキル基又は炭素数1~5のアルコキシ基である。
X1及びX2は、それぞれ独立に、単結合、-O-、-C(=O)-O-、-O-C(=O)-、-N=N-、-CH=CH-、-C≡C-、-CH=CH-C(=O)-O-又は-O-C(=O)-CH=CH-である。X1の数が2のとき、各X1は互いに同一でも異なっていてもよく、X2の数が2のとき、各X2は互いに同一でも異なっていてもよい。
Couは、クマリン-6-イル基又はクマリン-7-イル基であり、これらに結合する水素原子の一部が-NO2、-CN、-CH=C(CN)2、-CH=CH-CN、ハロゲン原子、炭素数1~5のアルキル基又は炭素数1~5のアルコキシ基で置換されてもよい。
Eは、-C(=O)-O-、-O-C(=O)-、-C(=O)-S-又は-S-C(=O)-である。
G1及びG2は、それぞれ独立に、N又はCHである。
破線は、結合手である。) - 前記重合体が、更に光二量化も光異性化もしない側鎖を有する請求項8記載の単層位相差膜形成用重合体組成物。
- 前記光二量化も光異性化もしない側鎖が、更に、下記式(b1)~(b11)のいずれかで表されるものである請求項9記載の単層位相差膜形成用重合体組成物。
R1は、-NO2、-CN、ハロゲン原子、フェニル基、ナフチル基、ビフェニリル基、フラニル基、1価窒素含有複素環基、炭素数5~8の1価脂環式炭化水素基、炭素数1~12のアルキル基又は炭素数1~12のアルコキシ基である。
R2は、フェニル基、ナフチル基、ビフェニリル基、フラニル基、1価窒素含有複素環基又は炭素数5~8の1価脂環式炭化水素基であり、これらの基の水素原子の一部又は全部が、-NO2、-CN、ハロゲン原子、炭素数1~5のアルキル基又は炭素数1~5のアルコキシ基で置換されてもよい。
R3は、水素原子、-NO2、-CN、ハロゲン原子、フェニル基、ナフチル基、ビフェニリル基、フラニル基、1価窒素含有複素環基、炭素数5~8の1価脂環式炭化水素基、炭素数1~12のアルキル基又は炭素数1~12のアルコキシ基である。
Eは、-C(=O)-O-、-O-C(=O)-、-C(=O)-S-又は-S-C(=O)-である。
aは、1~12の整数である。
k1~k5は、それぞれ独立に、0~2の整数であるが、k1~k5の合計は2以上である。
k6及びk7は、それぞれ独立に、0~2の整数であるが、k6及びk7の合計は1以上である。
m1、m2及びm3は、それぞれ独立に、1~3の整数である。
nは、0又は1である。
Z1及びZ2は、それぞれ独立に、単結合、-C(=O)-、-CH2-O-、又は-CF2-である。
破線は、結合手である。
また、式中のベンゼン環及びナフタレン環の水素原子の一部又は全部が、シアノ基、ハロゲン原子、炭素数1~5のアルキル基、炭素数2~6のアルキルカルボニル基又は炭素数1~5のアルコキシ基で置換されていてもよい。)
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JP2002090532A (ja) * | 2000-09-14 | 2002-03-27 | Konica Corp | 光学異方体および液晶表示装置 |
JP2003014930A (ja) * | 2001-06-28 | 2003-01-15 | Hayashi Telempu Co Ltd | 光学異方素子の製造方法、および光学異方素子 |
EP1832901A1 (en) * | 2006-03-09 | 2007-09-12 | CPFilms Inc. | Security film |
JP2008175916A (ja) * | 2007-01-16 | 2008-07-31 | Hayashi Telempu Co Ltd | 多重潜像素子およびその製造方法 |
JP2014215360A (ja) * | 2013-04-23 | 2014-11-17 | 富士フイルム株式会社 | 液晶組成物、位相差板、円偏光板および画像表示装置 |
WO2020170874A1 (ja) * | 2019-02-22 | 2020-08-27 | 林テレンプ株式会社 | 光学積層体およびその製造方法 |
WO2020203628A1 (ja) * | 2019-03-29 | 2020-10-08 | 日産化学株式会社 | 重合体組成物及び単層位相差材 |
WO2020203631A1 (ja) * | 2019-03-29 | 2020-10-08 | 日産化学株式会社 | 重合体組成物及び単層位相差材 |
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KR20230124993A (ko) | 2023-08-28 |
CN116601191A (zh) | 2023-08-15 |
TW202231690A (zh) | 2022-08-16 |
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