JP5903889B2 - ハードコートフィルム及び前面保護板 - Google Patents
ハードコートフィルム及び前面保護板 Download PDFInfo
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- JP5903889B2 JP5903889B2 JP2011538750A JP2011538750A JP5903889B2 JP 5903889 B2 JP5903889 B2 JP 5903889B2 JP 2011538750 A JP2011538750 A JP 2011538750A JP 2011538750 A JP2011538750 A JP 2011538750A JP 5903889 B2 JP5903889 B2 JP 5903889B2
- Authority
- JP
- Japan
- Prior art keywords
- meth
- hard coat
- acrylate
- coat film
- film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 230000001681 protective effect Effects 0.000 title claims description 11
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 137
- 239000000178 monomer Substances 0.000 claims description 46
- -1 acrylic compound Chemical class 0.000 claims description 35
- 229920000642 polymer Polymers 0.000 claims description 35
- 239000002994 raw material Substances 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 22
- 239000011342 resin composition Substances 0.000 claims description 20
- 239000006188 syrup Substances 0.000 claims description 16
- 235000020357 syrup Nutrition 0.000 claims description 16
- 150000002009 diols Chemical group 0.000 claims description 12
- 239000003999 initiator Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 229920001515 polyalkylene glycol Polymers 0.000 claims description 6
- 230000000379 polymerizing effect Effects 0.000 claims description 6
- 125000003827 glycol group Chemical group 0.000 claims description 5
- 125000003647 acryloyl group Chemical group O=C([*])C([H])=C([H])[H] 0.000 claims description 3
- 229920001577 copolymer Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 239000010408 film Substances 0.000 description 137
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 48
- 239000010410 layer Substances 0.000 description 46
- 238000000034 method Methods 0.000 description 29
- 238000006116 polymerization reaction Methods 0.000 description 22
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 21
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 18
- 238000001723 curing Methods 0.000 description 17
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 16
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- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 9
- 229920001223 polyethylene glycol Polymers 0.000 description 9
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 description 9
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 8
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- 239000012790 adhesive layer Substances 0.000 description 8
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 8
- 239000012986 chain transfer agent Substances 0.000 description 7
- 230000002349 favourable effect Effects 0.000 description 7
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- 238000012360 testing method Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 6
- CXMXRPHRNRROMY-UHFFFAOYSA-N sebacic acid Chemical compound OC(=O)CCCCCCCCC(O)=O CXMXRPHRNRROMY-UHFFFAOYSA-N 0.000 description 6
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 description 6
- 150000005846 sugar alcohols Polymers 0.000 description 6
- 238000012719 thermal polymerization Methods 0.000 description 6
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 5
- 125000000217 alkyl group Chemical group 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
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- STVZJERGLQHEKB-UHFFFAOYSA-N ethylene glycol dimethacrylate Chemical compound CC(=C)C(=O)OCCOC(=O)C(C)=C STVZJERGLQHEKB-UHFFFAOYSA-N 0.000 description 5
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- TXBCBTDQIULDIA-UHFFFAOYSA-N 2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)CO TXBCBTDQIULDIA-UHFFFAOYSA-N 0.000 description 4
- PTJWCLYPVFJWMP-UHFFFAOYSA-N 2-[[3-hydroxy-2-[[3-hydroxy-2,2-bis(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propoxy]methyl]-2-(hydroxymethyl)propane-1,3-diol Chemical compound OCC(CO)(CO)COCC(CO)(CO)COCC(CO)(CO)CO PTJWCLYPVFJWMP-UHFFFAOYSA-N 0.000 description 4
- KWOLFJPFCHCOCG-UHFFFAOYSA-N Acetophenone Chemical compound CC(=O)C1=CC=CC=C1 KWOLFJPFCHCOCG-UHFFFAOYSA-N 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 4
- 229920000178 Acrylic resin Polymers 0.000 description 4
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 239000001361 adipic acid Substances 0.000 description 4
- 235000011037 adipic acid Nutrition 0.000 description 4
- 150000008064 anhydrides Chemical class 0.000 description 4
- 238000011156 evaluation Methods 0.000 description 4
- 239000001530 fumaric acid Substances 0.000 description 4
- 238000010030 laminating Methods 0.000 description 4
- 238000003475 lamination Methods 0.000 description 4
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 4
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 description 3
- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 3
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 3
- 229920000297 Rayon Polymers 0.000 description 3
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 description 3
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
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- 230000007423 decrease Effects 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000003112 inhibitor Substances 0.000 description 3
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 3
- 239000002346 layers by function Substances 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 3
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920000058 polyacrylate Polymers 0.000 description 3
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- 229920006289 polycarbonate film Polymers 0.000 description 3
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- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
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- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- DTGKSKDOIYIVQL-WEDXCCLWSA-N (+)-borneol Chemical group C1C[C@@]2(C)[C@@H](O)C[C@@H]1C2(C)C DTGKSKDOIYIVQL-WEDXCCLWSA-N 0.000 description 2
- MSAHTMIQULFMRG-UHFFFAOYSA-N 1,2-diphenyl-2-propan-2-yloxyethanone Chemical compound C=1C=CC=CC=1C(OC(C)C)C(=O)C1=CC=CC=C1 MSAHTMIQULFMRG-UHFFFAOYSA-N 0.000 description 2
- DKEGCUDAFWNSSO-UHFFFAOYSA-N 1,8-dibromooctane Chemical compound BrCCCCCCCCBr DKEGCUDAFWNSSO-UHFFFAOYSA-N 0.000 description 2
- PIZHFBODNLEQBL-UHFFFAOYSA-N 2,2-diethoxy-1-phenylethanone Chemical compound CCOC(OCC)C(=O)C1=CC=CC=C1 PIZHFBODNLEQBL-UHFFFAOYSA-N 0.000 description 2
- OPLCSTZDXXUYDU-UHFFFAOYSA-N 2,4-dimethyl-6-tert-butylphenol Chemical compound CC1=CC(C)=C(O)C(C(C)(C)C)=C1 OPLCSTZDXXUYDU-UHFFFAOYSA-N 0.000 description 2
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- WYGWHHGCAGTUCH-UHFFFAOYSA-N 2-[(2-cyano-4-methylpentan-2-yl)diazenyl]-2,4-dimethylpentanenitrile Chemical compound CC(C)CC(C)(C#N)N=NC(C)(C#N)CC(C)C WYGWHHGCAGTUCH-UHFFFAOYSA-N 0.000 description 2
- KMNCBSZOIQAUFX-UHFFFAOYSA-N 2-ethoxy-1,2-diphenylethanone Chemical compound C=1C=CC=CC=1C(OCC)C(=O)C1=CC=CC=C1 KMNCBSZOIQAUFX-UHFFFAOYSA-N 0.000 description 2
- XMLYCEVDHLAQEL-UHFFFAOYSA-N 2-hydroxy-2-methyl-1-phenylpropan-1-one Chemical compound CC(C)(O)C(=O)C1=CC=CC=C1 XMLYCEVDHLAQEL-UHFFFAOYSA-N 0.000 description 2
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 2
- VVBLNCFGVYUYGU-UHFFFAOYSA-N 4,4'-Bis(dimethylamino)benzophenone Chemical compound C1=CC(N(C)C)=CC=C1C(=O)C1=CC=C(N(C)C)C=C1 VVBLNCFGVYUYGU-UHFFFAOYSA-N 0.000 description 2
- ROWKJAVDOGWPAT-UHFFFAOYSA-N Acetoin Chemical compound CC(O)C(C)=O ROWKJAVDOGWPAT-UHFFFAOYSA-N 0.000 description 2
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- QIGBRXMKCJKVMJ-UHFFFAOYSA-N Hydroquinone Chemical compound OC1=CC=C(O)C=C1 QIGBRXMKCJKVMJ-UHFFFAOYSA-N 0.000 description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- NNLVGZFZQQXQNW-ADJNRHBOSA-N [(2r,3r,4s,5r,6s)-4,5-diacetyloxy-3-[(2s,3r,4s,5r,6r)-3,4,5-triacetyloxy-6-(acetyloxymethyl)oxan-2-yl]oxy-6-[(2r,3r,4s,5r,6s)-4,5,6-triacetyloxy-2-(acetyloxymethyl)oxan-3-yl]oxyoxan-2-yl]methyl acetate Chemical compound O([C@@H]1O[C@@H]([C@H]([C@H](OC(C)=O)[C@H]1OC(C)=O)O[C@H]1[C@@H]([C@@H](OC(C)=O)[C@H](OC(C)=O)[C@@H](COC(C)=O)O1)OC(C)=O)COC(=O)C)[C@@H]1[C@@H](COC(C)=O)O[C@@H](OC(C)=O)[C@H](OC(C)=O)[C@H]1OC(C)=O NNLVGZFZQQXQNW-ADJNRHBOSA-N 0.000 description 2
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- ISAOCJYIOMOJEB-UHFFFAOYSA-N benzoin Chemical compound C=1C=CC=CC=1C(O)C(=O)C1=CC=CC=C1 ISAOCJYIOMOJEB-UHFFFAOYSA-N 0.000 description 2
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 2
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- YLHXLHGIAMFFBU-UHFFFAOYSA-N methyl phenylglyoxalate Chemical compound COC(=O)C(=O)C1=CC=CC=C1 YLHXLHGIAMFFBU-UHFFFAOYSA-N 0.000 description 2
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- ZRTKYIJRMCSONJ-UHFFFAOYSA-N 2-[2-[2-[2-[2-[2-[2-[2-[2-[2-(2-hydroxypropoxy)propoxy]propoxy]propoxy]propoxy]propoxy]propoxy]propoxy]propoxy]propoxy]propan-1-ol Chemical compound CC(O)COC(C)COC(C)COC(C)COC(C)COC(C)COC(C)COC(C)COC(C)COC(C)COC(C)CO ZRTKYIJRMCSONJ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
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Description
本発明において、ジ(メタ)アクリレート(A)単位は式(1)で示され、基材フィルムを構成する重合体(C)の構成単位の1つである。ジ(メタ)アクリレート(A)単位は下記式(2)で示される単量体を重合することにより重合体中に導入される。
本発明において、モノ(メタ)アクリレート(B)単位は基材フィルムを構成する重合体(C)の構成単位の1つである。モノ(メタ)アクリレート(B)単位は、本発明のハードコートフィルムの表面硬度を高くするために重合体(C)中に導入される。
重合体(C)を得るための単量体原料(以下、「単量体原料(c)」という)中には光重合開始剤及び熱重合開始剤等の重合開始剤が配合される。
本発明においては、単量体原料(c)として、ジ(メタ)アクリレート(A)及びモノ(メタ)アクリレート(B)を含有する単量体混合物中に、この単量体混合物と同様の単量体混合物の一部が重合した共重合体を溶解させたシラップ状物(c’)を使用することができる。
本発明のハードコートフィルムにおいて、重合体(C)は、ジ(メタ)アクリレート(A)単位及びモノ(メタ)アクリレート(B)単位を含む重合体であって、基材フィルムを構成する重合体であり、ハードコートフィルムに透明性及び耐衝撃性を付与するための成分である。
本発明において、基材フィルムは重合体(C)を含有するフィルムである。基材フィルム中には、必要に応じて滑剤、可塑剤、抗菌剤、防カビ剤、光安定剤、紫外線吸収剤、ブルーイング剤、染料、帯電防止剤、熱安定剤等の各種添加剤を添加することができる。
本発明において、ハードコート層は基材フィルムの少なくとも一方の表面に積層されている。
本発明のハードコートフィルムは、基材フィルムの少なくとも一方の表面にハードコート層が積層されたものである。ハードコートフィルムは、50〜500μmの厚みを有することが好ましい。ハードコートフィルムの厚みが50μm以上であれば膜厚精度の良好なハードコートフィルムを得ることができ、500μm以下であれば光学用ハードコートフィルムとして好適に使用することができる。本発明のハードコートフィルムは、各種ディスプレイ及び携帯情報端末等の前面保護板として使用できる。
(1)先ず、鋳型の少なくとも一方の内面にハードコート層形成材料を塗布し、これ重合硬化させて鋳型の少なくとも一方の内面にハードコート層を形成させる。
(2)次いで、この鋳型のキャビティ内に単量体原料(c)を注入して単量体原料(c)を重合させて重合体(C)(即ち、基材フィルム)を得る。尚、この重合体(C)(基材フィルム)が生成される際に、前記ハードコート層が基材フィルムに転写される。
(3)基材フィルムにハードコート層が転写されたハードコートフィルムを鋳型から剥離する。
粘着層付のハードコートフィルムは、ハードコートフィルムが50〜500μmの厚さを有し、粘着層が50〜300μmの厚さを有することが好ましい。粘着層は、50μm以上の厚さであれば十分な粘着性能を発揮し、300μm以下の厚さであれば光学用途に適した透明性を得ることができる。
本発明の前面保護板は、携帯型情報端末等において、液晶やELなどの表示窓を保護する部材として用いられる。この部材は、外部からの衝撃に対する強度が必要とされるが、板の厚みが薄くなると、衝撃強度が低下する傾向にある。特に近年、携帯電話、スマートフォン等の携帯型情報端末では、コンパクトでスリムなデザインが普及しつつあることから、その前面保護板として使用されるハードコートフィルムには、厚みをより薄くすることが要求されている。
YI値をJIS K7103に準拠して測定し、ハードコートフィルムの外観を評価した。
日本電色工業(株)製HAZE METER NDH2000(商品名)を用いてJIS K7361−1に示される測定法に準拠してハードコートフィルムの全光線透過率及びヘイズを測定し、ハードコートフィルムの透明性を評価した。
#000のスチールウールを装着した直径25.4mmの円形パッドをハードコートフィルムの表面上に置き、9.8Nの荷重下で20mmの距離を100回往復擦傷した。擦傷前と擦傷後のヘイズ値の差(Δヘイズ)を下式より求め、ハードコートフィルムの耐擦傷性を判断した。
[Δヘイズ(%)]=[擦傷後ヘイズ値(%)]−[擦傷前ヘイズ値(%)]
温度23℃及び相対湿度50%の雰囲気下、ステンレス鋼製球をハードコートフィルム試験片の上に落下させて、試験片の数(20個)の50%が破壊する高さである「50%破壊高さ」を求め、これによってハードコートフィルムの耐衝撃性を評価した。
JIS K5400に準拠してハードコートフィルムの鉛筆硬度を測定し、ハードコートフィルムの表面硬度を評価した。
スーパーダンベルカッター((株)ダンベル製、SDK−100D(商品名))を用いてダンベル状1号型のハードコートフィルムの試験片を5枚作成し、ストログラフT((株)東洋精機製作所製、商品名)を使用して室温23℃及び引張速度500mm/分で、5回の引張試験を実施し、その時の応力歪み曲線の接線を弾性率として、その平均値を求め、基材フィルムの硬さを評価した。
(1)基材フィルム用の単量体原料の調製
冷却管、温度計及び攪拌機を備えた反応器内に、ジ(メタ)アクリレート(A−1)としてポリブチレングリコールジメタクリレート(三菱レイヨン(株)製、アクリルエステルPBOM)10部、モノ(メタ)アクリレート(B−1)としてメチルメタクリレート(三菱レイヨン(株)製、アクリエステルM)90部、及び連鎖移動剤としてn−オクチルメルカプタン(エルフアトケムジャパン(株)製、NOM)0.4部を仕込み、撹拌しながら加熱を開始した。
表3に示す種類と量の材料を含有する活性エネルギー線硬化性樹脂組成物(E−1)を調製した。
ガラス板上に上記の活性エネルギー線硬化性樹脂組成物(E−1)を塗布し、次いで、塗布面側から高圧水銀灯を照度300mW/cm2及び光量1,200mJ/cm2の条件で照射して活性エネルギー線硬化性樹脂組成物(E−1)を硬化させ、厚み7μmのハードコート層が積層されたガラス板を作製した。
ガラス板とハードコート膜が積層されたガラス板とをそれぞれ1枚ずつ用意し、ハードコート膜が積層されたガラス板のハードコート膜が内側になるように2枚のガラス板を対向させた。次いで、2枚の対向するガラス板の対向面の周囲を軟質ポリ塩化ビニル製のガスケットで封じ、対向するガラス板の間隔が500μmである、注型重合用の鋳型を作製した。この鋳型内に、前記の基材フィルム用の単量体原料(c−1)を注入し、ケミカルランプで照度2mW/cm2及び光量3,600mJ/cm2の条件で単量体原料(c−1)を重合させ、次いで130℃の空気炉で30分間重合させ、重合体積層物を得た。鋳型を冷却した後にガラス板を取り除き、ハードコート層が積層された500μmの厚みを有するハードコートフィルムを得た。このハードコートフィルムの評価結果を表4に示す。
シラップ状物の原料を表1に示す条件に変更したこと以外は、実施例1と同様にして、シラップ状物(c’−2)を製造した。表1に示すシラップ状物を用い、基材フィルム用の単量体原料の組成及びハードコート層の厚みを表4に示す条件に変更した。比較例1では、ハードコート層を形成しなかった。これら以外の条件は実施例1と同様にして、それぞれ、ハードコートフィルムを得た。各ハードコートフィルムの評価結果を表4に示す。
冷却管、温度計及び攪拌機を備えた反応器内に、メチルメタクリレート100部を供給し、撹拌しながら−90kPaで10分間減圧した。次いで、窒素ガスで大気圧に戻し、加熱を開始した。内温が80℃になった時点で熱重合開始剤V65を0.05部添加し、更に内温100℃まで加熱して9分間保持した。その後、減圧冷却により室温まで冷却し、重合禁止剤である2,4−ジメチル−6−t−ブチルフェノール0.003部を混合した後に減圧下で脱気処理を行い、シラップ状物(c’−3)を得た。シラップ状物(c’−3)の重合率は約20%であった。シラップ状物(c’−3)の25℃での粘度は1,100cpsであった。結果を表1に示す。
実施例1〜5から明らかなように、本発明のハードコートフィルムは透明性、耐擦傷性及び耐衝撃性に優れていることが分かる。一方、比較例1から明らかなように、ハードコート層が積層されていない基材フィルムでは耐擦傷性に劣ることが分かる。また、比較例2から明らかなように、基材フィルムを形成する重合体中にジ(メタ)アクリレート(A)単位を含有しない場合には、得られるハードコートフィルムの耐衝撃性が著しく低いことが分かる。
Claims (9)
- 前記ハードコート層が、分子内に(メタ)アクリロイル基を2つ以上含む多官能性(メタ)アクリル化合物(D)及び光重合開始剤を含有する活性エネルギー線硬化性樹脂組成物(E)を硬化させた層であることを特徴とする請求項1に記載のハードコートフィルム。
- 前記ハードコート層の厚みが1〜20μmであることを特徴とする請求項1に記載のハードコートフィルム。
- 前記ハードコート層の厚みが1〜20μmであることを特徴とする請求項2に記載のハードコートフィルム。
- 前記基材フィルムを構成する重合体(C)を得るための単量体原料(c)として、ジ(メタ)アクリレート(A)及びモノ(メタ)アクリレート(B)を含有する単量体混合物中に、ジ(メタ)アクリレート(A)及びモノ(メタ)アクリレート(B)を含有する単量体混合物の一部が重合した共重合体を溶解させたシラップ状物(c’)を使用することを特徴とする請求項1に記載のハードコートフィルムの製造方法。
- 前記シラップ状物(c’)の粘度が100〜8000mPa・sであることを特徴とする請求項5に記載のハードコートフィルムの製造方法。
- 厚みが50〜500μmであることを特徴とする請求項1〜4のいずれかの一項に記載のハードコートフィルム。
- 厚みが50〜500μmであることを特徴とする請求項5又は6に記載のハードコートフィルムの製造方法。
- 請求項1に記載のハードコートフィルムからなる前面保護板。
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TW201213462A (en) | 2012-04-01 |
JPWO2012029905A1 (ja) | 2013-10-31 |
TWI509036B (zh) | 2015-11-21 |
CN103189206A (zh) | 2013-07-03 |
KR20140001856A (ko) | 2014-01-07 |
WO2012029905A1 (ja) | 2012-03-08 |
EP2612756A4 (en) | 2017-05-10 |
CN103189206B (zh) | 2015-03-18 |
EP2612756A1 (en) | 2013-07-10 |
US20130202880A1 (en) | 2013-08-08 |
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