JP2018005254A - 粘着剤組成物、偏光板用保護フィルム、偏光板及び液晶表示装置 - Google Patents
粘着剤組成物、偏光板用保護フィルム、偏光板及び液晶表示装置 Download PDFInfo
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- JP2018005254A JP2018005254A JP2017196655A JP2017196655A JP2018005254A JP 2018005254 A JP2018005254 A JP 2018005254A JP 2017196655 A JP2017196655 A JP 2017196655A JP 2017196655 A JP2017196655 A JP 2017196655A JP 2018005254 A JP2018005254 A JP 2018005254A
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- sensitive adhesive
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- acrylate
- film
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- 239000000178 monomer Substances 0.000 claims description 74
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- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 61
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- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 2
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Classifications
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives 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; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/08—Homopolymers or copolymers of acrylic acid esters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/62—Polymers of compounds having carbon-to-carbon double bonds
- C08G18/6216—Polymers of alpha-beta ethylenically unsaturated carboxylic acids or of derivatives thereof
- C08G18/625—Polymers of alpha-beta ethylenically unsaturated carboxylic acids; hydrolyzed polymers of esters of these acids
- C08G18/6254—Polymers of alpha-beta ethylenically unsaturated carboxylic acids and of esters of these acids containing hydroxy groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8003—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen
- C08G18/8006—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32
- C08G18/8009—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203
- C08G18/8022—Masked polyisocyanates masked with compounds having at least two groups containing active hydrogen with compounds of C08G18/32 with compounds of C08G18/3203 with polyols having at least three hydroxy groups
- C08G18/8029—Masked aromatic polyisocyanates
-
- 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
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/062—Copolymers with monomers not covered by C09D133/06
- C09D133/066—Copolymers with monomers not covered by C09D133/06 containing -OH groups
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives 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; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives 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; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
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Abstract
Description
ΔX≦2nm (1)
{式中、ΔXは上記粘着剤組成物を用いて製造したシート状粘着剤を、23℃の温度で、シート面の縦軸方向に500μm延伸させた時、式「(nx−ny)× d」(ここで、 nxは上記シート状粘着剤の面方向から横軸への屈折率を表し、nyは上記シート状粘着剤の面方向から縦軸への屈折率を表し、dは上記シート状粘着剤の厚さを表す。)で測定される面方向位相差(Rin)の絶対値を表す。}
ΔX≦2nm (1)
{式中、ΔXは上記粘着剤組成物を用いて製造した、シート状粘着剤を、23℃の温度で、シート面の縦軸方向に500μm延伸させた時、数式「(nx−ny)× d」(ここで、 nxは上記シート状粘着剤の面方向から横軸への屈折率を表し、nyは上記シート状粘着剤の面方向から縦軸への屈折率を表し、dは上記シート状粘着剤の厚さを表す。)で測定される面方向位相差(Rin)の絶対値を表す。}
本発明の粘着剤組成物は、粘着剤に一定の変形が生じた時、発生する位相差の絶対値が特定範囲に属するように設計される。
る:
Rin=(nx−ny)×d (2)
(式中、nxはシート状粘着剤の面方向から横軸への屈折率を表し、nyはシート状粘着剤の面方向から縦軸への屈折率を表し、dは上記シート状粘着剤の厚さを表す。)
Rth=(nz−ny)×d (3)
(式中、nzはシート状粘着剤の厚さ方向の屈折率を表し、nyはシート状粘着剤の面方向から縦軸への屈折率を表し、dは上記シート状粘着剤の厚さを表す。)
また、上記化学式(2)の定義で、nは好ましくは0〜2の定数、より好ましくは0又は1であってもよい。また、上記化学式(2)の定義で、Qは好ましくは単一結合、−O−又は−S−であってもよい。
Bは単一結合、−CH=N−、−N=N−、−N=N(O)−、−COO−、−CH2O−、−C(R7)2−CO−、−COO−CH2−、−CH=CH−、−C≡C−、−S−、−SO2−、−φ(R7)−、−CH=N−φ(R7)−N=CH−、−CH=CH−φ(R7)−N=CH−、−CH=CH−φ(R7)−CH=CH−、−CH=CH−φ(R7)−φ(R8)−CH=CH−、−CH=N−φ(R7)−(R8)−N=CH−、−CH=N−φ(R7)−φ(R8)−CH=CH−、−N=N−φ(R7)−N=CH−、−C(=O)−O−φ(R7)−C(CH3)2−、ナフタレンコア又はアントラセンコアを表し、
X、Y、R7及びR8はそれぞれ独立して水素、ハロゲン、シアノ、アミノ、ヒドロキシ、アルキル、アルコキシ、アリール、ジアルキルアミン及びクミルを表し、
aは0〜3の定数を表し、
bはaが0のとき1〜3の定数、aが1〜3の定数の時0〜3の定数を表す。}
Q1〜Q16及びWはそれぞれ独立して水素、ハロゲン、シアノ、ペルフルオロアルキル、ペルフルオロアルキルオキシ、−R9、-OR9、−NHR9、−N(R9)2、−C(=O)R9、−SR9、−SOR9、−SO2R9、−C(=O)NR9、−NR9C(=O)R9、−C(=O)OR9、−OC(=O)R9、又は−OC(=O)OR9{ここで、R9は水素、アルキル、アルケニル、アルキニル又は−(R10O)qR11(ここで、R10はアルキレンであり、R11はアルキルであり、qは1〜5の定数である。)である。}である。]であり;
l、m、n及びoはそれぞれ独立して0〜2の定数であり、l+m+n+oは2つ以上の定数であり;
E及びFはそれぞれ独立して水素、ハロゲン、シアノ、−R9、−OR9、−NHR9、−N(R9)2、−NCO、−NCS、−C(=O)R9又は−Si(R9)3であり;
G1、G2、及びG3はそれぞれ独立して単一結合、−O−、−R10O−、−NR10−、−S−、−SO−、−SO2−、アルキレン、アルケニレン、アルキニレン又は−U−T−V−{ここで、U及びTはそれぞれ独立して単一結合、−S−、−NR10−、−O(CH2)p−、カルボニル又は−O−(ここで、pは0〜5の定数である。)であり、Vは単一結合、−O−、カルボニル、−NR10−、−S−、−(CH2)p−、−O(CH2)p−、又は−(CH2)pO−(ここで、pは0〜5の定数である。)である。}である。]
l、m、n及びoで、l、m及びoが1であり、nが0であるか、又はl及びoが1であり、m及びnが0であり、
G1はエテニレン、プロペニレン、エチニレン又はプロチエニレン、−S−、−SO2−、-SO−、−CO−、−C(=O)−O−又は−O−C(=O)−であり、
G2及びG3はそれぞれ独立して単一結合、エテニレン、プロペニレン、エチニレン又はプロチエニレンであってもよい。
l、m、n及びoで、l、m及びoが1であり、nが0であるか、又はl及びoが1であり、m及びnが0であり、
E及びFは水素、シアノ、エチル、プロピル、イソプロピル、ペンチル、ヘキシル、エトキシ、プロポキシ、ペントキシ、ヘキシルオキシ、トリメチルシリル、トリヘキシルシリル又はヘキシルジメチルシリルであり、
G2及びG3はそれぞれ独立して単一結合、エテニレン、プロペニレン、エチニレン又はプロチエニレンであってもよい。
(式中、Q1、Q2、Q14、Q15及びWはそれぞれ独立して上述した置換基又は上述した置換基中の好ましい置換基であってもよく、より好ましくは上記置換基の中アルキル、アルケニル又はアルキニルを含む置換基であってもよい。
また、本発明は基材フィルム;及び上記基材フィルムの一面又は両面に形成され、上述した本発明に係る粘着剤組成物を含有する粘着層;を含む偏光板用保護フィルムに関するものである。
(式中、Aは本発明の粘着剤組成物で製造された粘着剤の質量を表し、Bは室温でエチルアセテートで2時間浸漬後、上記粘着剤の不溶解分の乾燥質量を表す。)
製造例1.アクリル系共重合体(A−1)の製造
窒素ガスが還流され、温度調節が容易なように冷却装置を備えた1Lの反応器に、n−ブチルアクリレート(n−BA)95.8重量部、アクリル酸(AA)4重量部及びヒドロキシエチルメタアクリレート(2−HEMA)0.2重量部を含む単量体混合物を投入し、溶剤としてエチルアセテート(EAc)100重量部を投入した。次いで、酸素除去のために窒素ガスを1時間パージングした後、62℃に保持した。その後、上記混合物を均一にした後、反応開始剤としてエチルアセテートに50%濃度に希釈したアゾビスイソブチロニトリル(AIBN)0.03重量部を投入し、8時間反応させてアクリル系共重合体(A−1)を製造した。
下記表1に示されるような組成を採用したことを除いては上記製造例1と同様にしてアクリル系共重合体を製造した。
アクリル系共重合体A−1 100重量部、架橋剤としてイソシアネート系トリメチロールプロパンのトリレンジイソシアネート付加物(TDI−1)0.5重量部及び正の光弾性係数を有する化合物として、下記一般式(1)の化合物5重量部を投入し、適正の濃度に希釈して均一に混合した後、離型紙にコーティングして乾燥し、厚さ25μmの均一な粘着層を製造した。
上記製造された粘着層を一面に光弾性係数が1.35ブリュースタのアクリル系保護フィルムが適用された偏光板に粘着加工した。得られた偏光板は適切な大きさに切断して評価に用いた。
粘着剤組成物の組成を下記表2に示されるように変更したことを除いては、実施例1と同様にして粘着偏光板を製造した。また、実施例及び比較例で使われた正の光弾性係数を有する化合物(1)〜(4)の具体的な種類は故に示した。
製造された粘着剤を二つのガラス板間に粘着面積を横10mm×縦20mmにして接着して試片を製造した。その後、製造された試片を引張試験機を用いて、23℃の温度で、縦方向に500μm及び600μmの変形量でそれぞれ延伸させて発生する位相差(Rin)を測定した。この時位相差(Rin)は下記式(1)により定義される。
(式中、Rinは面方向位相差を表し、nxは粘着剤の面方向からx軸(横軸)への屈折率を表し、nyは粘着剤の面方向からy軸(縦軸)への屈折率を表し、dは上粘着剤の厚さを表す。)
実施例及び比較例で製造された粘着剤がコーティングされた偏光板(90mm×170mm)をガラス基板(110mm×190mm×0.7mm)に両面に光学吸収軸がクロス状態で付着させた。この時、加えられた圧力は約5kg/cm2であり、気泡や異物が生じないようにクリーンルーム作業を行った。製造された試片を耐湿熱特性は60℃の温度及び90%の相対湿度条件下で1000時間放置した後、気泡や剥離の発生を観察して評価し、耐熱特性は80℃の温度で1000時間間放置した後、気泡や剥離の発生を観察して評価した。評価直前試片を室温で24時間放置した後、試験を行っており、評価基準は次の通りである。
○:気泡や剥離現象ない
Δ:気泡や剥離現象若干発生
×:気泡や剥離現象多量発生
耐久信頼性評価時と同じ試片を使用して、光透過度の均一性を調べた。具体的にはバックライトを用いて暗室で光が漏れる部分があるかを観察しており、試験時、コーティングされた偏光板(400mm×200mm)をガラス基板(410mm×210mm×0.7mm)に光軸を交差して両面に付着した。光透過均一性評価に用いられた試片は60℃の温度で500時間、又は50℃の90%R.Hの相対湿度で500時間放置後、室温で使用した。評価基準は次の通りである。
○:光透過性の不均一現象肉眼で判断するのが困難
Δ:光透過性の不均一現象若干ある
×:光透過性の不均一現象多量ある
Claims (20)
- 下記式(1)の条件を満たす粘着剤組成物:
X≦2nm (1)
式中、ΔXは上記粘着剤組成物を用いて製造したシート状粘着剤を、23℃の温度で、シート面の縦軸方向に500μm延伸させた時、式「(nx−ny)× d」(ここで、 nxは上記シート状粘着剤の面方向から横軸への屈折率を表し、nyは上記シート状粘着剤の面方向から縦軸への屈折率を表し、dは上記シート状粘着剤の厚さを表す。)で測定される面方向位相差(Rin)の絶対値を表す。 - 重量平均分子量が500,000以上であるベース樹脂を含む請求項1に記載の粘着剤組成物。
- 前記ベース樹脂は(メタ)アクリル酸エステル単量体80重量部〜99.8重量部;及び架橋性単量体0.01重量部〜10重量部を含む単量体混合物の重合体である請求項2に記載の粘着剤組成物。
- 前記(メタ)アクリル酸エステル単量体が、メチル(メタ)アクリレート、エチル(メタ)アクリレート、n−プロピル(メタ)アクリレート、イソプロピル(メタ)アクリレート、n−ブチル(メタ)アクリレート、t−ブチル(メタ)アクリレート、sec−ブチル(メタ)アクリレート、ペンチル(メタ)アクリレート、2−エチルヘキシル(メタ)アクリレート、2−エチルブチル(メタ)アクリレート、n−オクチル(メタ)アクリレート、イソオクチル(メタ)アクリレート、イソノニル(メタ)アクリレート、ラウリル(メタ)アクリレート、イソボニル(メタ)アクリレート及びテトラデシル(メタ)アクリレートよりなる群から選択された一つ以上である請求項3に記載の粘着剤組成物。
- 前記架橋性単量体が、ヒドロキシ基含有単量体、カルボキシル基含有単量体及び窒素含有単量体よりなる群から選択された一つ以上である請求項3に記載の粘着剤組成物。
- 正の光弾性係数を有する化合物を更に含む請求項2に記載の粘着剤組成物。
- 正の光弾性係数を有する化合物は下記化学式(3)で示される請求項8に記載の粘着剤組成物:
Bは単一結合、−CH=N−、−N=N−、−N=N(O)−、−COO−、−CH2O−、−C(R7)2−CO−、−COO−CH2−、−CH=CH−、−C≡C−、−S−、−SO2−、−φ(R7)−、−CH=N−φ(R7)−N=CH−、−CH=CH−φ(R7)−N=CH−、−CH=CH−φ(R7)−CH=CH−、−CH=CH−φ(R7)−φ(R8)−CH=CH−、−CH=N−φ(R7)−(R8)−N=CH−、−CH=N−φ(R7)−φ(R8)−CH=CH−、−N=N−φ(R7)−N=CH−、−C(=O)−O−φ(R7)−C(CH3)2−、ナフタレンコア又はアントラセンコアを表し、
X、Y、R7及びR8はそれぞれ独立して水素、ハロゲン、シアノ、アミノ、ヒドロキシ、アルキル、アルコキシ、アリール、ジアルキルアミン及びクミルを表し、
aは0〜3の定数を表し、
bはaが0のとき1〜3の定数、aが1〜3の定数の時0〜3の定数を表す。 - 正の光弾性係数を有する化合物は下記化学式(4)で示される請求項8に記載の粘着剤組成物:
Q1〜Q16及びWはそれぞれ独立して水素、ハロゲン、シアノ、ペルフルオロアルキル、ペルフルオロアルキルオキシ、−R9、-OR9、−NHR9、−N(R9)2、−C(=O)R9、−SR9、−SOR9、−SO2R9、−C(=O)NR9、−NR9C(=O)R9、−C(=O)OR9、−OC(=O)R9、又は−OC(=O)OR9{ここで、R9は水素、アルキル、アルケニル、アルキニル又は−(R10O)qR11(ここで、R10はアルキレンであり、R11はアルキルであり、qは1〜5の定数である。)である。}である。]であり;
l、m、n及びoはそれぞれ独立して0〜2の定数であり、l+m+n+oは2つ以上の定数であり;
E及びFはそれぞれ独立して水素、ハロゲン、シアノ、−R9、−OR9、−NHR9、−N(R9)2、−NCO、−NCS、−C(=O)R9又は−Si(R9)3であり;
G1、G2、及びG3はそれぞれ独立して単一結合、−O−、−R10O−、−NR10−、−S−、−SO−、−SO2−、アルキレン、アルケニレン、アルキニレン又は−U−T−V−{ここで、U及びTはそれぞれ独立して単一結合、−S−、−NR10−、−O(CH2)p−、カルボニル又は−O−(ここで、pは0〜5の定数である)であり、Vは単一結合、−O−、カルボニル、−NR10−、−S−、−(CH2)p−、−O(CH2)p−、又は−(CH2)pO−(ここで、pは0〜5の定数である。)である。}である。 - 前記ベース樹脂100重量部に対して、0.1重量部〜10重量部の架橋剤を更に含む請求項2に記載の粘着剤組成物。
- 前記架橋剤がイソシアネート系化合物、エポキシ系化合物、アジリジン系化合物及び金属キレート系化合物よりなる群から選択された一つ以上である請求項11に記載の粘着剤組成物。
- 前記ベース樹脂100重量部に対して、0.01重量部〜10重量部のシラン系カップリング剤を更に含む請求項2に記載の粘着剤組成物。
- 基材フィルム;及び上記基材フィルムの一面又は両面に形成され、 請求項1〜13のいずれか1項に記載の粘着剤組成物の硬化物を含有する粘着層を含む偏光板用保護フィルム。
- 前記基材フィルムは光弾性係数の絶対値が10ブリュースタ(brewster)以下である請求項14に記載の偏光板用保護フィルム。
- 前記基材フィルムは、ポリカーボネートフィルム;飽和シクロオレフィンフィルム;側鎖に置換された又は無置換のイミド基を有するオレフィン熱可塑性樹脂フィルム;側鎖に置換された又は無置換のフェニル基及びニトリル基を有する熱可塑性樹脂フィルム;又はアクリルフィルムである請求項15に記載の偏光板用保護フィルム。
- 前記基材フィルムは、アクリル系樹脂及び共役ジエン系ゴム含有グラフト共重合体を含むアクリルフィルムである請求項15に記載の偏光板用保護フィルム。
- 偏光フィルム又は偏光素子;及び上記偏光フィルム又は偏光素子の一面又は両面に形成された請求項14に記載の保護フィルムを含む偏光板。
- 保護層、反射層、防眩層、位相差板、広視野角補償フィルム及び輝度向上フィルムよりなる群から選択された一つ以上を更に含む請求項18に記載の偏光板。
- 請求項18に記載の偏光板が液晶セルの一面又は両面に貼合されている液晶パネルを含む液晶表示装置。
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EP2295515A2 (en) | 2011-03-16 |
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