WO2014208699A1 - Acrylic pressure-sensitive adhesive composition, method of producing pressure-sensitive adhesive layer, polarization film with pressure-sensitive adhesive layer, and method of promoting cross-linking in acrylic pressure-sensitive adhesive composition - Google Patents
Acrylic pressure-sensitive adhesive composition, method of producing pressure-sensitive adhesive layer, polarization film with pressure-sensitive adhesive layer, and method of promoting cross-linking in acrylic pressure-sensitive adhesive composition Download PDFInfo
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- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
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- 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
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- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/202—Conductive
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/412—Transparent
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/42—Polarizing, birefringent, filtering
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- B32B2457/00—Electrical equipment
- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/49—Phosphorus-containing compounds
- C08K5/51—Phosphorus bound to oxygen
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- C09J2301/408—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the adhesive layer
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3033—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state in the form of a thin sheet or foil, e.g. Polaroid
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- G—PHYSICS
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Abstract
Description
(式中、R1及びR2は、それぞれ独立して、水素原子、又は、酸素原子を含んでいてもよい、炭素数1~18の炭化水素残基である)
で表される化合物を含有し、
前記一般式(1)で表される化合物の含有量が、前記(メタ)アクリル系ポリマー100重量部に対して0.005~5重量部であることを特徴とするアクリル系粘着剤組成物に関する。 That is, the present invention includes at least one crosslinking agent selected from the group consisting of (meth) acrylic polymers, organic peroxide crosslinking agents, and isocyanate crosslinking agents, and the following general formula (1):
(Wherein R 1 and R 2 are each independently a hydrogen atom or a hydrocarbon residue having 1 to 18 carbon atoms which may contain an oxygen atom)
Containing a compound represented by
The acrylic pressure-sensitive adhesive composition is characterized in that the content of the compound represented by the general formula (1) is 0.005 to 5 parts by weight with respect to 100 parts by weight of the (meth) acrylic polymer. .
基材上に塗布されたアクリル系粘着剤組成物を架橋させて粘着剤層を形成する工程を含むことを特徴とするアクリル系粘着剤層の製造方法に関する。 Moreover, this invention includes the process of apply | coating the said acrylic adhesive composition on a base material, and the process of bridge | crosslinking the acrylic adhesive composition apply | coated on the base material, and forming an adhesive layer. The manufacturing method of the acrylic adhesive layer characterized by these.
前記アクリル系粘着剤組成物に、さらに、下記一般式(1):
(式中、R1及びR2は、それぞれ独立して、水素原子、又は、酸素原子を含んでいてもよい、炭素数1~18の炭化水素残基である)
で表される化合物を、前記(メタ)アクリル系ポリマー100重量部に対して0.005~5重量部添加して、架橋することを特徴とするアクリル系粘着剤組成物の架橋促進方法に関する。 Furthermore, the present invention provides a crosslink of an acrylic pressure-sensitive adhesive composition comprising a (meth) acrylic polymer, and one or more crosslinking agents selected from the group consisting of an organic peroxide crosslinking agent and an isocyanate crosslinking agent. A promotion method,
In addition to the acrylic pressure-sensitive adhesive composition, the following general formula (1):
(Wherein R 1 and R 2 are each independently a hydrogen atom or a hydrocarbon residue having 1 to 18 carbon atoms which may contain an oxygen atom)
The present invention relates to a method for promoting crosslinking of an acrylic pressure-sensitive adhesive composition, which comprises adding 0.005 to 5 parts by weight of a compound represented by formula (100) by weight to 100 parts by weight of the (meth) acrylic polymer and crosslinking.
本発明のアクリル系粘着剤組成物は、(メタ)アクリル系ポリマー、有機過酸化物系架橋剤、及びイソシアネート系架橋剤からなる群から選択される1種以上の架橋剤、並びに、下記一般式(1):
(式中、R1及びR2は、それぞれ独立して、水素原子、又は、酸素原子を含んでいてもよい、炭素数1~18の炭化水素残基である)で表される化合物を含有し、
前記一般式(1)で表される化合物の含有量が、前記(メタ)アクリル系ポリマー100重量部に対して0.005~5重量部であることを特徴とする。 1. Acrylic pressure-sensitive adhesive composition The acrylic pressure-sensitive adhesive composition of the present invention is one or more cross-linking agents selected from the group consisting of (meth) acrylic polymers, organic peroxide-based cross-linking agents, and isocyanate-based cross-linking agents. And the following general formula (1):
(Wherein R 1 and R 2 are each independently a hydrogen atom or a hydrocarbon residue having 1 to 18 carbon atoms which may contain an oxygen atom) And
The content of the compound represented by the general formula (1) is 0.005 to 5 parts by weight with respect to 100 parts by weight of the (meth) acrylic polymer.
(式中、R1は、前記同様であり、R3は、炭素数1~18のアルキル基、又は、アルケニル基であり、nは0~15の整数である。)で表されるリン酸エステルが好ましい。 In the present invention, examples of the compound represented by the general formula (1) include the following general formula (2):
(Wherein R 1 is as defined above, R 3 is an alkyl group having 1 to 18 carbon atoms or an alkenyl group, and n is an integer of 0 to 15). Esters are preferred.
本発明で用いるリン酸エステルとしては、一般式(1)で表される化合物(又は、一般式(2)で表される化合物)、又はこれらの塩や多量体からなる群から選択される化合物を1種単独で使用しても2種以上を混合して使用してもよいが、添加量を減らし、より良い効果を得ることができる観点から、リン酸、リン酸モノエステル、及び、リン酸ジエステルからなる群から選択される2つ以上の混合物であることが好ましい。また、リン酸とリン酸モノエステルを含む混合物として使用することもできる。ここで、リン酸モノエステルとは、一般式(1)のR1及びR2のいずれか一方が水素原子であり、他方が、酸素原子を含んでいてもよい、炭素数1~18の炭化水素残基である化合物(一般式(2)の場合は、R1が水素原子である化合物)であり、リン酸ジエステルとは、一般式(1)のR1及びR2が、酸素原子を含んでいてもよい、炭素数1~18の炭化水素残基である化合物(一般式(2)の場合は、R1が酸素原子を含んでいてもよい、炭素数1~18の炭化水素残基である化合物)である。
The phosphate ester used in the present invention is a compound selected from the group consisting of a compound represented by the general formula (1) (or a compound represented by the general formula (2)), or a salt or multimer thereof. May be used alone or in admixture of two or more. However, phosphoric acid, phosphoric acid monoester, and phosphorus may be used from the viewpoint of reducing the addition amount and obtaining a better effect. It is preferably a mixture of two or more selected from the group consisting of acid diesters. Moreover, it can also be used as a mixture containing phosphoric acid and phosphoric acid monoester. Here, the phosphoric acid monoester is a carbon atom having 1 to 18 carbon atoms in which one of R 1 and R 2 in the general formula (1) is a hydrogen atom and the other may contain an oxygen atom. It is a compound that is a hydrogen residue (in the case of the general formula (2), a compound in which R 1 is a hydrogen atom), and a phosphoric acid diester is a compound in which R 1 and R 2 in the general formula (1) are oxygen atoms A compound which is a hydrocarbon residue having 1 to 18 carbon atoms which may be contained (in the case of the general formula (2), R 1 may contain an oxygen atom and a hydrocarbon residue having 1 to 18 carbon atoms may be contained. Compound which is a group).
本発明のアクリル系粘着剤層の製造方法は、前記アクリル系粘着剤組成物を基材上の塗布する工程、及び、
基材上に塗布されたアクリル系粘着剤組成物を架橋させて粘着剤層を形成する工程を含むことを特徴とする。 2. Method for producing acrylic pressure-sensitive adhesive layer The method for producing the acrylic pressure-sensitive adhesive layer of the present invention comprises a step of applying the acrylic pressure-sensitive adhesive composition on a substrate, and
It includes a step of forming a pressure-sensitive adhesive layer by crosslinking an acrylic pressure-sensitive adhesive composition applied on a substrate.
本発明のアクリル系粘着剤層は、前記アクリル系粘着剤層の製造方法により製造されたことを特徴とする。 3. Acrylic pressure-sensitive adhesive layer The acrylic pressure-sensitive adhesive layer of the present invention is produced by the method for producing an acrylic pressure-sensitive adhesive layer.
本発明の粘着剤層付偏光フィルムは、偏光フィルムの少なくとも片面に、前記アクリル系粘着剤層を有することを特徴とする。 4). The polarizing film with an adhesive layer The polarizing film with an adhesive layer of this invention has the said acrylic adhesive layer on the at least single side | surface of a polarizing film, It is characterized by the above-mentioned.
本発明の積層体は、前記アクリル系粘着剤層付偏光フィルムと、透明導電膜が積層されており、前記アクリル系粘着剤層付偏光フィルムの粘着剤層と透明導電膜が接することを特徴とする。 5. Laminated body In the laminated body of the present invention, the polarizing film with an acrylic adhesive layer and a transparent conductive film are laminated, and the adhesive layer of the polarizing film with an acrylic adhesive layer and the transparent conductive film are in contact with each other. Features.
本発明の積層体は、入力装置(タッチパネル等)を備えた画像表示装置(液晶表示装置、有機EL(エレクトロルミネッセンス)表示装置、PDP(プラズマディスプレイパネル)、電子ペーパーなど)、入力装置(タッチパネル等)等の機器を構成する基材(部材)又はこれらの機器に用いられる基材(部材)の製造において好適に用いることができるが、特に、タッチパネル用の光学基材の製造において好適に用いることができる。また、抵抗膜方式や静電容量方式といったタッチパネル等の方式に関係なく使用することができる。 6). Image display device The laminate of the present invention includes an image display device (liquid crystal display device, organic EL (electroluminescence) display device, PDP (plasma display panel), electronic paper, etc.) provided with an input device (touch panel, etc.), input device Although it can be used suitably in manufacture of the base material (member) which comprises apparatuses, such as (a touch panel etc.), or the base material (member) used for these apparatuses, it is especially suitable in manufacture of the optical base material for touch panels. Can be used. Moreover, it can be used irrespective of systems, such as a touch panel, such as a resistive film system and a capacitive system.
本発明のアクリル系粘着剤組成物の架橋促進方法は、(メタ)アクリル系ポリマー、並びに、有機過酸化物系架橋剤及びイソシアネート系架橋剤からなる群から選択される1種以上の架橋剤を含むアクリル系粘着剤組成物の架橋促進方法であって、
前記アクリル系粘着剤組成物に、さらに、下記一般式(1):
(式中、R1及びR2は、それぞれ独立して、水素原子、又は、酸素原子を含んでいてもよい、炭素数1~18の炭化水素残基である)で表される化合物を、前記(メタ)アクリル系ポリマー100重量部に対して0.005~5重量部添加して、架橋することを特徴とする。 7). Method for promoting crosslinking of acrylic pressure-sensitive adhesive composition The method for promoting crosslinking of the acrylic pressure-sensitive adhesive composition of the present invention comprises a (meth) acrylic polymer, and a group consisting of an organic peroxide-based crosslinking agent and an isocyanate-based crosslinking agent. A method for promoting crosslinking of an acrylic pressure-sensitive adhesive composition comprising one or more selected crosslinking agents,
In addition to the acrylic pressure-sensitive adhesive composition, the following general formula (1):
Wherein R 1 and R 2 are each independently a hydrogen atom or a hydrocarbon residue having 1 to 18 carbon atoms which may contain an oxygen atom, 0.005 to 5 parts by weight is added to 100 parts by weight of the (meth) acrylic polymer to crosslink.
非晶性ポリエチレンテレフタレート(PET)基材に、厚さ9μmのポリビニルアルコール(PVA)層が製膜された積層体を、延伸温度130℃の空中補助延伸によって延伸積層体を生成した。次に、延伸積層体を染色によって着色積層体を生成し、さらに着色積層体を延伸温度65℃のホウ酸水中延伸によって、総延伸倍率が5.94倍になるように非晶性PET基材と一体に延伸された4μm厚のPVA層を含む光学フィルム積層体を生成した。このような2段延伸によって非晶性PET基材に製膜されたPVA層のPVA分子が高次に配向され、染色によって吸着されたヨウ素がポリヨウ素イオン錯体として一方向に高次に配向された高機能偏光子を構成する、厚さ4μmのPVA層を含む光学フィルム積層体を生成することができた。さらに、当該光学フィルム積層体の偏光子の片面に、ポリビニルアルコール系接着剤を塗布しながら、けん化処理した40μm厚のアクリル樹脂フィルム(透明保護フィルム(1))を貼合せたのち、非晶性PET基材を剥離し、片面保護の薄型偏光子を用いた偏光フィルムを作製した。以下、これを偏光フィルム(1)という。 Production Example 1 (Production of Polarizing Film (1))
A stretched laminate was produced by subjecting a laminate in which a polyvinyl alcohol (PVA) layer having a thickness of 9 μm to a non-crystalline polyethylene terephthalate (PET) substrate to a stretching temperature of 130 ° C. by air auxiliary stretching. Next, a colored laminate is produced by dyeing the stretched laminate, and the colored laminate is further stretched in boric acid in water at a stretching temperature of 65 ° C. so that the total stretch ratio is 5.94 times. And an optical film laminate including a 4 μm thick PVA layer stretched together. The PVA molecules in the PVA layer formed on the amorphous PET substrate by such two-stage stretching are oriented in the higher order, and the iodine adsorbed by the dyeing is oriented in the one direction as the polyiodine ion complex. It was possible to produce an optical film laminate including a PVA layer having a thickness of 4 μm that constitutes a highly functional polarizer. Furthermore, a 40 μm-thick acrylic resin film (transparent protective film (1)) subjected to saponification treatment was applied to one side of the polarizer of the optical film laminate while applying a polyvinyl alcohol-based adhesive, and then amorphous. The PET substrate was peeled off to produce a polarizing film using a single-side protected thin polarizer. Hereinafter, this is referred to as a polarizing film (1).
厚さ80μmのPVAフィルムを、速度比の異なるロール間において、30℃、0.3%濃度のヨウ素溶液中で1分間染色しながら、3倍まで延伸した。その後、60℃、4%濃度のホウ酸、10%濃度のヨウ化カリウムを含む水溶液中に0.5分間浸漬しながら総合延伸倍率が6倍になるように延伸した。次いで、30℃、1.5%濃度のヨウ化カリウムを含む水溶液中に10秒間浸漬することで洗浄した後、50℃で4分間乾燥を行い、厚さ20μmの偏光子を得た。さらに、当該光学フィルム積層体の偏光子の表面にポリビニルアルコール系接着剤を塗布しながら、けん化処理した40μm厚のアクリル樹脂フィルム(透明保護フィルム(1))を貼合せたのち、非晶性PET基材を剥離した後、他の片面に厚さ40μmのノルボルネン系フィルム(透明保護フィルム(2))を、ポリビニルアルコール系接着剤により貼り合せて、両面保護偏光フィルムを作製した。以下、これを偏光フィルム(2)という。 Production Example 2 (Production of Polarizing Film (2))
A PVA film having a thickness of 80 μm was stretched up to 3 times while being dyed in an iodine solution of 0.3% concentration at 30 ° C. between rolls having different speed ratios. Thereafter, the film was stretched so that the total stretch ratio was 6 times while immersed in an aqueous solution containing 60% at 4% concentration of boric acid and 10% concentration of potassium iodide for 0.5 minutes. Next, after washing by immersing in an aqueous solution containing potassium iodide at 30 ° C. and 1.5% concentration for 10 seconds, drying was performed at 50 ° C. for 4 minutes to obtain a polarizer having a thickness of 20 μm. Further, after applying a saponified 40 μm thick acrylic resin film (transparent protective film (1)) while applying a polyvinyl alcohol-based adhesive on the surface of the polarizer of the optical film laminate, amorphous PET After peeling off the base material, a norbornene-based film (transparent protective film (2)) having a thickness of 40 μm was bonded to the other surface with a polyvinyl alcohol-based adhesive to prepare a double-sided protective polarizing film. Hereinafter, this is referred to as a polarizing film (2).
冷却管、窒素導入管、温度計、及び撹拌装置を備えた反応容器に、アクリル酸ブチル99部、アクリル酸4-ヒドロキシブチル1部、及び開始剤として、2,2’-アゾビスイソブチロニトリル(AIBN)をモノマー(固形分)100部に対して1部を酢酸エチルと共に加えて窒素ガス気流下、60℃で7時間反応させた後、その反応液に酢酸エチルを加えて、重量平均分子量155万のアクリル系ポリマー(A-1)を含有する溶液を得た(固形分濃度30重量%)。 Production Example 3 (Preparation of solution containing acrylic polymer (A-1))
In a reaction vessel equipped with a cooling tube, a nitrogen introduction tube, a thermometer, and a stirrer, 99 parts of butyl acrylate, 1 part of 4-hydroxybutyl acrylate, and 2,2′-azobisisobutyroyl as an initiator 1 part of nitrile (AIBN) is added to 100 parts of monomer (solid content) together with ethyl acetate and reacted at 60 ° C. for 7 hours under a nitrogen gas stream. Then, ethyl acetate is added to the reaction solution to obtain a weight average. A solution containing an acrylic polymer (A-1) having a molecular weight of 150,000 was obtained (solid content concentration 30% by weight).
モノマーの組成を表2に示す組成に変更した以外は、製造例3と同様にして、アクリル系ポリマー(A-2)~(A-4)を含有する溶液を得た(それぞれの溶液について、固形分濃度30重量%)。 Production Examples 4 to 6 (Preparation of solutions containing acrylic polymers (A-2) to (A-4))
A solution containing the acrylic polymers (A-2) to (A-4) was obtained in the same manner as in Production Example 3 except that the monomer composition was changed to the composition shown in Table 2 (for each solution, Solid content concentration 30% by weight).
BA:ブチルアクリレート
AA:アクリル酸
HEA:2-ヒドロキシエチルアクリレート
HBA:4-ヒドロキシブチルアクリレート Abbreviations in Table 2 are as follows.
BA: butyl acrylate AA: acrylic acid HEA: 2-hydroxyethyl acrylate HBA: 4-hydroxybutyl acrylate
<アクリル系ポリマーの重量平均分子量(Mw)の測定>
作製したアクリル系ポリマーの重量平均分子量は、GPC(ゲル・パーミエーション・クロマトグラフィー)により測定した。 The weight average molecular weight of the acrylic polymers obtained in Production Examples 3 to 6 was measured by the following measuring method.
<Measurement of weight average molecular weight (Mw) of acrylic polymer>
The weight average molecular weight of the prepared acrylic polymer was measured by GPC (gel permeation chromatography).
カラム:
サンプルカラム;東ソー社製、TSKguardcolumn Super HZ-H(1本)+TSKgel Super HZM-H(2本)
リファレンスカラム;東ソー社製、TSKgel Super H-RC(1本)
流量:0.6mL/min
注入量:10μL
カラム温度:40℃
溶離液:THF
注入試料濃度:0.2重量%
検出器:示差屈折計
なお、重量平均分子量はポリスチレン換算により算出した。 Equipment: Tosoh Corporation, HLC-8220GPC
column:
Sample column: TSK guard column Super HZ-H (1) + TSK gel Super HZM-H (2) manufactured by Tosoh Corporation
Reference column: TSKgel Super H-RC (1 piece), manufactured by Tosoh Corporation
Flow rate: 0.6mL / min
Injection volume: 10 μL
Column temperature: 40 ° C
Eluent: THF
Injection sample concentration: 0.2% by weight
Detector: differential refractometer The weight average molecular weight was calculated in terms of polystyrene.
(アクリル系粘着剤組成物の調整)
製造例3で得られたアクリル系ポリマー(A-1)、架橋剤として、前記アクリル系ポリマー溶液の固形分100部あたり、ヘキサメチレンジイソシアネートのトリメチロールプロパンとのアダクト体(商品名:タケネートD160N、三井化学(株)製)0.1部と、ジベンゾイルパーオキサイド0.3部と、リン酸エステル(商品名:フォスファノールSM-172、東邦化学工業(株)製)0.05部と、γ-グリシドキシプロピルメトキシシラン(商品名:KBM-403、信越化学工業(株)製)0.075部を混合して、アクリル系粘着剤組成物を得た。 Example 1
(Adjustment of acrylic adhesive composition)
Acrylic polymer (A-1) obtained in Production Example 3 and, as a cross-linking agent, an adduct of hexamethylene diisocyanate with trimethylolpropane per 100 parts of the solid content of the acrylic polymer solution (trade name: Takenate D160N, Mitsui Chemicals Co., Ltd.) 0.1 part, dibenzoyl peroxide 0.3 part, phosphate ester (trade name: Phosphanol SM-172, Toho Chemical Industry Co., Ltd.) 0.05 part, Then, 0.075 part of γ-glycidoxypropylmethoxysilane (trade name: KBM-403, manufactured by Shin-Etsu Chemical Co., Ltd.) was mixed to obtain an acrylic pressure-sensitive adhesive composition.
前記アクリル系粘着剤組成物を、シリコーン系剥離剤で処理されたポリエチレンテレフタレートフィルム(基材)の表面に、ファウンテンコーターで均一に塗工し、155℃の空気循環式恒温オーブンで2分間乾燥し、基材の表面に厚さ20μmの粘着剤層を形成した。次いで、偏光フィルム(1)の保護フィルムを有さない面に、粘着剤層を形成したセパレータを移着させ、粘着剤層付偏光フィルムを作製した。 (Preparation of polarizing film with adhesive layer)
The acrylic pressure-sensitive adhesive composition is uniformly applied to the surface of a polyethylene terephthalate film (base material) treated with a silicone-based release agent with a fountain coater, and dried in an air circulation type thermostatic oven at 155 ° C. for 2 minutes. A pressure-sensitive adhesive layer having a thickness of 20 μm was formed on the surface of the substrate. Subsequently, the separator which formed the adhesive layer was transferred to the surface which does not have a protective film of a polarizing film (1), and the polarizing film with an adhesive layer was produced.
実施例1の(アクリル系粘着剤組成物の調整)において、リン酸エステルの添加量を、0.05部から表3に記載の部数に変更した以外は、実施例1と同様にして、粘着剤層付偏光フィルムを作製した。 Examples 2 to 3
In Example 1 (Adjustment of acrylic pressure-sensitive adhesive composition), the adhesive amount was changed in the same manner as in Example 1 except that the amount of phosphate ester was changed from 0.05 parts to the number of parts shown in Table 3. A polarizing film with an agent layer was produced.
実施例1の(粘着剤層付偏光フィルムの作製)において、乾燥条件を155℃、120秒間から、表3に記載した条件に変更した以外は、実施例1と同様にして、粘着剤層付偏光フィルムを作製した。 Examples 4-6
In Example 1 (Preparation of polarizing film with pressure-sensitive adhesive layer), except that the drying conditions were changed from 155 ° C. and 120 seconds to the conditions described in Table 3, the same as in Example 1 was followed. A polarizing film was produced.
実施例1の(アクリル系粘着剤組成物の調整)において、フォスファノールSM-172(商品名、東邦化学工業(株)製)0.05部を、フォスファノールRS-410(商品名、酸価:105mgKOH/g、東邦化学工業(株)製)0.05部に変更した以外は、実施例1と同様にして、粘着剤層付偏光フィルムを作製した。 Example 7
In Example 1 (adjustment of acrylic pressure-sensitive adhesive composition), 0.05 part of phosphanol SM-172 (trade name, manufactured by Toho Chemical Co., Ltd.) was added to phosphanol RS-410 (trade name, A polarizing film with a pressure-sensitive adhesive layer was produced in the same manner as in Example 1 except that the acid value was changed to 0.05 part (acid value: 105 mg KOH / g, manufactured by Toho Chemical Industry Co., Ltd.).
実施例1の(アクリル系粘着剤組成物の調整)において、フォスファノールSM-172(商品名、東邦化学工業(株)製)0.05部を、リン酸(試薬特級)(和光純薬工業(株)製)0.05部に変更した以外は、実施例1と同様にして、粘着剤層付偏光フィルムを作製した。 Example 8
In Example 1 (preparation of acrylic pressure-sensitive adhesive composition), 0.05 part of Phosphanol SM-172 (trade name, manufactured by Toho Chemical Industry Co., Ltd.) was added to phosphoric acid (special reagent grade) (Wako Pure Chemical Industries, Ltd.). A polarizing film with a pressure-sensitive adhesive layer was produced in the same manner as in Example 1, except that the amount was changed to 0.05 part (produced by Kogyo Co., Ltd.).
実施例1の(アクリル系粘着剤組成物の調整)において、製造例3で得られたアクリル系ポリマー(A-1)を含有する溶液を、それぞれ、製造例4~6で得られたアクリル系ポリマー(A-2)~(A-4)を含有する溶液に変更し、かつ、リン酸エステルの配合量を0.05部から0.1部に変更した以外は、実施例1と同様にして、粘着剤層付偏光フィルムを作製した。 Examples 9-11
In Example 1 (Preparation of acrylic pressure-sensitive adhesive composition), the solutions containing the acrylic polymer (A-1) obtained in Production Example 3 were used as the acrylic polymers obtained in Production Examples 4 to 6, respectively. Except for changing to a solution containing polymers (A-2) to (A-4) and changing the amount of phosphate ester from 0.05 part to 0.1 part, the same as in Example 1. Thus, a polarizing film with an adhesive layer was produced.
実施例1の(粘着剤層付偏光フィルムの作製)において、偏光フィルム(1)を、製造例2で得られた偏光フィルム(2)に変更した以外は、実施例1と同様にして、粘着剤層付偏光フィルムを作製した。 Example 12
In Example 1 (Preparation of polarizing film with pressure-sensitive adhesive layer), the polarizing film (1) was changed to the polarizing film (2) obtained in Production Example 2, and the same procedure as in Example 1 was followed. A polarizing film with an agent layer was produced.
実施例1の(粘着剤層付偏光フィルムの作製)において、ヘキサメチレンジイソシアネートのトリメチロールプロパンとのアダクト体(商品名:タケネートD160N、三井化学(株)製)の添加量を0.1部から0.12部に変更し、かつ、ジベンゾイルパーオキサイドを添加しなかった以外は、実施例1と同様にして、粘着剤層付偏光フィルムを作製した。 Example 13
In Example 1 (production of polarizing film with pressure-sensitive adhesive layer), the addition amount of adduct body (trade name: Takenate D160N, manufactured by Mitsui Chemicals, Inc.) of hexamethylene diisocyanate with trimethylolpropane is from 0.1 part. A polarizing film with a pressure-sensitive adhesive layer was produced in the same manner as in Example 1 except that the content was changed to 0.12 parts and dibenzoyl peroxide was not added.
実施例1の(粘着剤層付偏光フィルムの作製)において、ジベンゾイルパーオキサイドの添加量を0.3部から0.4部に変更し、かつ、ヘキサメチレンジイソシアネートのトリメチロールプロパンとのアダクト体(商品名:タケネートD160N、三井化学(株)製)を添加しなかった以外は、実施例1と同様にして、粘着剤層付偏光フィルムを作製した。 Example 14
In Example 1 (production of polarizing film with pressure-sensitive adhesive layer), the amount of dibenzoyl peroxide added was changed from 0.3 part to 0.4 part, and hexamethylene diisocyanate was adducted with trimethylolpropane. A polarizing film with an adhesive layer was produced in the same manner as in Example 1 except that (trade name: Takenate D160N, manufactured by Mitsui Chemicals, Inc.) was not added.
実施例1の(アクリル系粘着剤組成物の調整)において、フォスファノールSM-172(商品名、東邦化学工業(株)製)0.05部を、MP-4(商品名、酸価:670mgKOH/g、モノ・ジ混合物、大八化学工業(株)製)0.05部に変更した以外は、実施例1と同様にして、粘着剤層付偏光フィルムを作製した。 Example 15
In Example 1 (adjustment of acrylic pressure-sensitive adhesive composition), 0.05 part of Phosphanol SM-172 (trade name, manufactured by Toho Chemical Co., Ltd.) was added to MP-4 (trade name, acid value: A polarizing film with a pressure-sensitive adhesive layer was produced in the same manner as in Example 1 except that the content was changed to 0.05 part (670 mg KOH / g, mono / di mixture, manufactured by Daihachi Chemical Industry Co., Ltd.).
実施例1の(アクリル系粘着剤組成物の調整)において、リン酸エステルを添加しなかった以外は、実施例1と同様にして、粘着剤層付偏光フィルムを作製した。 Comparative Example 1
In Example 1 (Adjustment of acrylic pressure-sensitive adhesive composition), a polarizing film with a pressure-sensitive adhesive layer was produced in the same manner as in Example 1 except that the phosphate ester was not added.
実施例1の(アクリル系粘着剤組成物の調整)において、リン酸エステル、ジベンゾイルパーオキサイドを添加しなった以外は、実施例1と同様にして、粘着剤層付偏光フィルムを作製した。 Comparative Example 2
A polarizing film with a pressure-sensitive adhesive layer was produced in the same manner as in Example 1 except that phosphate ester and dibenzoyl peroxide were not added in (Adjustment of acrylic pressure-sensitive adhesive composition) in Example 1.
実施例1の(アクリル系粘着剤組成物の調整)において、リン酸エステルを添加せず、かつ、(粘着剤層付偏光フィルムの作製)において、乾燥条件を155℃、120秒間から、表3に記載した条件に変更した以外は、実施例1と同様にして、粘着剤層付偏光フィルムを作製した。 Comparative Examples 3 and 4
In Example 1 (Adjustment of acrylic pressure-sensitive adhesive composition), the phosphoric acid ester was not added, and in (Preparation of polarizing film with pressure-sensitive adhesive layer), the drying conditions were changed from 155 ° C. for 120 seconds to Table 3. A polarizing film with a pressure-sensitive adhesive layer was produced in the same manner as in Example 1 except that the conditions were changed to those described in 1. above.
(分析方法)
実施例及び比較例で使用したリン酸系化合物の組成を、31P-NMR(Acetone-d6、室温)の測定結果に基づき算出した。測定により得られたピークの積分値より、mol%を算出した後、エステルのアルコール成分のアルキル鎖から含有量比(重量%)を算出した。
(31P-NMR測定条件)
測定装置:Bruker Biospin、AVANCEIII-400
観測周波数:160MHz(31P)
フリップ角:30°
測定溶媒:Acetone-d6(重アセトン)
測定温度:室温
化学シフト標準:P=(OCH3)3 in Acetone-d6(31P;140ppm 外部標準) The phosphoric acid compounds used in Examples and Comparative Examples were analyzed as follows. The results are shown in Table 3.
(Analysis method)
The composition of the phosphoric acid compound used in Examples and Comparative Examples was calculated based on the measurement result of 31 P-NMR (Acetone-d6, room temperature). After calculating mol% from the integrated value of the peak obtained by measurement, the content ratio (% by weight) was calculated from the alkyl chain of the alcohol component of the ester.
(31 P-NMR measurement conditions)
Measuring apparatus: Bruker Biospin, AVANCE III-400
Observation frequency: 160 MHz ( 31 P)
Flip angle: 30 °
Measuring solvent: Acetone-d6 (heavy acetone)
Measurement temperature: room temperature chemical shift standard: P = (OCH 3 ) 3 in Acetone-d6 ( 31 P; 140 ppm external standard)
実施例及び比較例で得られたアクリル系粘着剤組成物について、各実施例、比較例と同じ乾燥条件(温度、時間)で処理して粘着剤層を形成し、さらに温度23℃、湿度65%RHの条件に2時間放置した後、及び、5日間放置した後、当該粘着剤層を0.2gとり、あらかじめ重量を測定したフッ素樹脂フィルム(TEMISH NTF-1122、日東電工(株)製)(重量:Wa)に包み、アクリル系粘着剤組成物が漏れないように縛った。これを、測定サンプルとする。測定サンプルの重量を測定し(重量:Wb)、サンプル瓶にいれた。サンプル瓶に酢酸エチルを40cc加えて、7日間放置した。その後、測定サンプル(フッ素樹脂フィルム+アクリル系粘着剤組成物)を取り出し、当該測定サンプルをアルミカップ上で、130℃、2時間乾燥させた。測定サンプルの重量(Wc)を測定し、次式によりゲル分率を求めた。 <Measurement of gel fraction>
About the acrylic adhesive composition obtained by the Example and the comparative example, it processed on the same dry conditions (temperature, time) as each Example and the comparative example, forms an adhesive layer, and also temperature 23 degreeC and humidity 65 Fluorine resin film (TEMISH NTF-1122, manufactured by Nitto Denko Corporation) in which 0.2 g of the pressure-sensitive adhesive layer was taken and weighed in advance after being left for 2 hours under the condition of% RH and for 5 days. Wrapped in (weight: Wa) and tied so that the acrylic pressure-sensitive adhesive composition did not leak. This is a measurement sample. The measurement sample was weighed (weight: Wb) and placed in a sample bottle. 40 cc of ethyl acetate was added to the sample bottle and left for 7 days. Thereafter, a measurement sample (fluororesin film + acrylic pressure-sensitive adhesive composition) was taken out, and the measurement sample was dried on an aluminum cup at 130 ° C. for 2 hours. The weight (Wc) of the measurement sample was measured, and the gel fraction was determined by the following formula.
実施例及び比較例で得られた粘着剤層付偏光フィルムについて、作製後24時間以内に1辺の長さが270mmの正方形に打ち抜いたものについて、目視、手触りで観察して、偏光フィルム側面の粘着感の有無があるか否か、また、偏光フィルムの表面が粘着剤によって汚れているか否かを判断した。
◎:粘着剤による汚れが見られない。
○:粘着剤による汚れが問題ない程度ではあるが見られる。
△:粘着感があり、汚れが一部確認される。
×:粘着感があり、汚れが端部の大部分に確認される。 <Processability>
About the polarizing film with the pressure-sensitive adhesive layer obtained in the examples and the comparative examples, what was punched into a square having a length of 270 mm on one side within 24 hours after the production was observed visually and by hand, It was judged whether or not there was a sticky feeling and whether or not the surface of the polarizing film was soiled by the adhesive.
(Double-circle): The stain | pollution | contamination by an adhesive is not seen.
○: Stain due to adhesive is not problematic.
(Triangle | delta): There exists a feeling of adhesion and some stains are confirmed.
X: There is a sticky feeling, and dirt is confirmed on most of the end portions.
実施例、比較例において架橋剤添加後12時間放置し、その後、塗工したものについて以下の基準で判断した。
◎:塗工したものの外観に問題がなかった。
○:塗工したものの外観に少しブツが確認される。
×:外観に大きなゲルの塊が確認される、若しくは配合溶液がゲル化している。 <Pot life>
In Examples and Comparative Examples, the sample was allowed to stand for 12 hours after the addition of the cross-linking agent, and then the coated material was judged according to the following criteria.
A: There was no problem in the appearance of the coated material.
○: Slightly irregularities are observed on the appearance of the coated material.
X: A large lump of gel is confirmed in appearance, or the blended solution is gelled.
実施例、比較例で得られた粘着型偏光フィルムサンプルのセパレータフィルムを剥がし、無アルカリガラスに貼り合わせ、50℃、5atm、15分間のオートクレーブ処理を行った後、85℃の加熱オーブンおよび60℃/90%RHの恒温恒湿機に投入した。500h後の偏光板の剥がれおよび発泡を目視で観察し、以下の基準で判断した。
◎:全く剥がれまたは発泡が認められなかった。
○:目視では確認できない程度の剥がれまたは発泡が発生した。
△:目視で確認できる小さな剥がれまたは発泡が発生した。
×:明らかな剥がれまたは発泡が認められた。 <Durability test of adhesive (peeling and foaming)>
The separator film of the adhesive polarizing film sample obtained in Examples and Comparative Examples was peeled off and bonded to non-alkali glass, and after autoclaving at 50 ° C., 5 atm for 15 minutes, a 85 ° C. heating oven and 60 ° C. / 90% RH constant temperature and humidity machine. The peeling and foaming of the polarizing plate after 500 hours were visually observed and judged according to the following criteria.
A: No peeling or foaming was observed.
○: Exfoliation or foaming that could not be confirmed visually occurred.
Δ: Small peeling or foaming that can be visually confirmed occurred.
X: Clear peeling or foaming was recognized.
B-1:フォスファノールSM-172、酸価:219mgKOH/g(東邦化学工業(株)製)
B-2:フォスファノールRS-410、酸価:105mgKOH/g(東邦化学工業(株)製)
B-3:リン酸(試薬特級)(和光純薬工業(株)製)
B-4:MP-4、酸価:670mgKOH/g、モノ・ジ混合物、大八化学工業(株)製
過酸化物:ジベンゾイルパーオキサイド
イソシアネート系:ヘキサメチレンジイソシアネートのトリメチロールプロパンとのアダクト体(商品名:タケネートD160N、三井化学(株)製)
シランカップリング剤:γ-グリシドキシプロピルメトキシシラン(商品名:KBM-403、信越化学工業(株)製)
Abbreviations in Table 4 are as follows.
B-1: Phosphanol SM-172, acid value: 219 mg KOH / g (manufactured by Toho Chemical Industry Co., Ltd.)
B-2: Phosphanol RS-410, acid value: 105 mg KOH / g (manufactured by Toho Chemical Industry Co., Ltd.)
B-3: Phosphoric acid (special grade reagent) (manufactured by Wako Pure Chemical Industries, Ltd.)
B-4: MP-4, acid value: 670 mg KOH / g, mono-di mixture, manufactured by Daihachi Chemical Industry Co., Ltd .: dibenzoyl peroxide isocyanate system: adduct form of hexamethylene diisocyanate with trimethylolpropane (Product name: Takenate D160N, manufactured by Mitsui Chemicals, Inc.)
Silane coupling agent: γ-glycidoxypropylmethoxysilane (trade name: KBM-403, manufactured by Shin-Etsu Chemical Co., Ltd.)
Claims (15)
- (メタ)アクリル系ポリマー、有機過酸化物系架橋剤、及びイソシアネート系架橋剤からなる群から選択される1種以上の架橋剤、並びに、下記一般式(1):
(式中、R1及びR2は、それぞれ独立して、水素原子、又は、酸素原子を含んでいてもよい、炭素数1~18の炭化水素残基である)
で表される化合物を含有し、
前記一般式(1)で表される化合物の含有量が、前記(メタ)アクリル系ポリマー100重量部に対して0.005~5重量部であることを特徴とするアクリル系粘着剤組成物。 One or more crosslinking agents selected from the group consisting of (meth) acrylic polymers, organic peroxide crosslinking agents, and isocyanate crosslinking agents, and the following general formula (1):
(Wherein R 1 and R 2 are each independently a hydrogen atom or a hydrocarbon residue having 1 to 18 carbon atoms which may contain an oxygen atom)
Containing a compound represented by
An acrylic pressure-sensitive adhesive composition, wherein the content of the compound represented by the general formula (1) is 0.005 to 5 parts by weight with respect to 100 parts by weight of the (meth) acrylic polymer. - 前記一般式(1)で表される化合物が、酸価が80~900mgKOH/gであるリン酸エステルであることを特徴とする請求項1に記載の粘着剤組成物。 The pressure-sensitive adhesive composition according to claim 1, wherein the compound represented by the general formula (1) is a phosphate ester having an acid value of 80 to 900 mgKOH / g.
- 前記(メタ)アクリル系ポリマー100重量部に対し、前記有機過酸化物系架橋剤を0.05~2重量部含有することを特徴とする請求項1又は2に記載のアクリル系粘着剤組成物。 The acrylic pressure-sensitive adhesive composition according to claim 1 or 2, comprising 0.05 to 2 parts by weight of the organic peroxide-based crosslinking agent with respect to 100 parts by weight of the (meth) acrylic polymer. .
- 前記アクリル系粘着剤組成物が、有機過酸化物系架橋剤及びイソシアネート系架橋剤を含み、イソシアネート系架橋剤の含有量が、有機過酸化物系架橋剤100重量部に対して、5~1000重量部であることを特徴とする請求項1~3のいずれかに記載のアクリル系粘着剤組成物。 The acrylic pressure-sensitive adhesive composition contains an organic peroxide crosslinking agent and an isocyanate crosslinking agent, and the content of the isocyanate crosslinking agent is 5 to 1000 with respect to 100 parts by weight of the organic peroxide crosslinking agent. The acrylic pressure-sensitive adhesive composition according to any one of claims 1 to 3, wherein the acrylic pressure-sensitive adhesive composition is in parts by weight.
- 前記(メタ)アクリル系ポリマーの重量平均分子量が、120万~300万であることを特徴とする請求項1~4のいずれかに記載のアクリル系粘着剤組成物。 5. The acrylic pressure-sensitive adhesive composition according to claim 1, wherein the (meth) acrylic polymer has a weight average molecular weight of 1,200,000 to 3,000,000.
- 請求項1~5のいずれかに記載のアクリル系粘着剤組成物を基材上の塗布する工程、及び基材上に塗布されたアクリル系粘着剤組成物を架橋させて粘着剤層を形成する工程を含むことを特徴とするアクリル系粘着剤層の製造方法。 A step of applying the acrylic pressure-sensitive adhesive composition according to any one of claims 1 to 5 on a base material, and a cross-linking of the acrylic pressure-sensitive adhesive composition applied on the base material to form a pressure-sensitive adhesive layer The manufacturing method of the acrylic adhesive layer characterized by including a process.
- 前記架橋が、70~170℃で30~240秒間加熱することにより行われることを特徴とする請求項6に記載のアクリル系粘着剤層の製造方法。 7. The method for producing an acrylic pressure-sensitive adhesive layer according to claim 6, wherein the crosslinking is performed by heating at 70 to 170 ° C. for 30 to 240 seconds.
- 請求項6又は7に記載のアクリル系粘着剤層の製造方法により製造されたことを特徴とするアクリル系粘着剤層。 An acrylic pressure-sensitive adhesive layer produced by the method for producing an acrylic pressure-sensitive adhesive layer according to claim 6.
- 架橋後、5日後のゲル分率が60~95重量%であることを特徴とする請求項8に記載のアクリル系粘着剤層。 The acrylic pressure-sensitive adhesive layer according to claim 8, wherein the gel fraction after 60 days of crosslinking is 60 to 95% by weight.
- 架橋後、2時間後のゲル分率が55~85重量%であることを特徴とする請求項8又は9のいずれかに記載のアクリル系粘着剤層。 10. The acrylic pressure-sensitive adhesive layer according to claim 8, wherein the gel fraction after crosslinking for 2 hours is 55 to 85% by weight.
- 偏光フィルムの少なくとも片面に、請求項8~10のいずれかに記載のアクリル系粘着剤層を有することを特徴とする粘着剤層付偏光フィルム。 A polarizing film with a pressure-sensitive adhesive layer, comprising the acrylic pressure-sensitive adhesive layer according to any one of claims 8 to 10 on at least one surface of the polarizing film.
- 請求項11に記載の粘着剤層付偏光フィルムと透明導電膜を有する透明導電性基材が積層されており、前記粘着剤層付偏光フィルムの粘着剤層と透明導電性基材の透明導電膜が接することを特徴とする積層体。 The polarizing film with an adhesive layer of Claim 11 and the transparent conductive base material which has a transparent conductive film are laminated | stacked, The adhesive layer of the said polarizing film with an adhesive layer and the transparent conductive film of a transparent conductive base material A laminate characterized by contacting.
- 前記透明導電膜が、酸化インジウムスズから形成されることを特徴とする請求項12に記載の積層体。 The laminate according to claim 12, wherein the transparent conductive film is made of indium tin oxide.
- 請求項12又は13記載の積層体を用いることを特徴とする画像表示装置。 An image display device using the laminate according to claim 12 or 13.
- (メタ)アクリル系ポリマー、並びに、有機過酸化物系架橋剤及びイソシアネート系架橋剤からなる群から選択される1種以上の架橋剤を含むアクリル系粘着剤組成物の架橋促進方法であって、
前記アクリル系粘着剤組成物に、さらに、下記一般式(1):
(式中、R1及びR2は、それぞれ独立して、水素原子、又は、酸素原子を含んでいてもよい、炭素数1~18の炭化水素残基である)
で表される化合物を、
前記(メタ)アクリル系ポリマー100重量部に対して0.005~5重量部添加して、架橋することを特徴とするアクリル系粘着剤組成物の架橋促進方法。
A method for promoting crosslinking of an acrylic pressure-sensitive adhesive composition comprising a (meth) acrylic polymer, and at least one crosslinking agent selected from the group consisting of an organic peroxide crosslinking agent and an isocyanate crosslinking agent,
In addition to the acrylic pressure-sensitive adhesive composition, the following general formula (1):
(Wherein R 1 and R 2 are each independently a hydrogen atom or a hydrocarbon residue having 1 to 18 carbon atoms which may contain an oxygen atom)
A compound represented by
A method for promoting crosslinking of an acrylic pressure-sensitive adhesive composition, comprising adding 0.005 to 5 parts by weight to 100 parts by weight of the (meth) acrylic polymer and crosslinking.
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