JP2013067782A5

JP2013067782A5 -

Info

Publication number: JP2013067782A5
Application number: JP2012191258A
Authority: JP
Filing date: 2012-08-31
Publication date: 2015-08-06
Anticipated expiration: 2032-08-31

Description

＜光学用粘着シートの作製＞
＜実施例１＞
粘着性樹脂（Ａ）として、合成例Ａ−１の粘着性樹脂溶液１００部に対して、プロピレングリコールモノメチルエーテルアセテートで１００倍希釈した顔料分散体（製造例１）の溶液を０．８部、シランカップリング剤としてＳ−５１０（チッソ社製）を０．１部、硬化剤（Ｄ）としてキシレンジイソシアネートのトリメチロールプロパンアダクト体を０．４部加え、よく攪拌し粘着剤を得た。その後、この粘着剤を厚さ７５μｍの剥離ライナー上に、乾燥後の厚みが５０μｍになるように塗布し、１００℃の熱風オーブンで２分間乾燥させた。そして、粘着剤層側に３８μｍの剥離ライナーを貼り合せ、この状態で室温にて７日間エージングさせ、光学用粘着シート１を得た。
<Production of optical pressure-sensitive adhesive sheet>
<Example 1>
As an adhesive resin (A), 0.8 part of a pigment dispersion (Production Example 1) diluted 100-fold with propylene glycol monomethyl ether acetate to 100 parts of the adhesive resin solution of Synthesis Example A-1, 0.1 part of S-510 (manufactured by Chisso) as a silane coupling agent and 0.4 part of a trimethylolpropane adduct of xylene diisocyanate as a curing agent (D) were added and stirred well to obtain an adhesive. Thereafter, this pressure-sensitive adhesive was applied onto a release liner having a thickness of 75 μm so that the thickness after drying was 50 μm, and dried in a hot air oven at 100 ° C. for 2 minutes. Then, a 38 μm release liner was bonded to the pressure-sensitive adhesive layer side, and this state was aged at room temperature for 7 days to obtain an optical pressure-sensitive adhesive sheet 1.

＜実施例１３＞
粘着性樹脂（Ａ）として、合成例Ａ−１の不揮発分１００部に対して、青色顔料を０．００４４部、分散剤（Ｃ）として顔料１００重量部に対して樹脂分散剤溶液Ｃ−２の不揮発分８１．８重量部、次いでこの溶液に酢酸エチルを加えて、不揮発分が１５．０％になるように調製した。そして、溶液を十分に攪拌した後に、ビーズを用いて、アイガーミル（アイガージャパン社製「ミニモデルＭ−２５０ＭＫＩＩ」）で分散した後、濾過し、不揮発成分が１５．０％の混合物を作製した。
得られた混合物を用いて、実施例１と同様にして、実施例１３に示すような光学用粘着シートを得た。
<Example 13>
As an adhesive resin (A), 0.0044 parts of a blue pigment and 100 parts by weight of a pigment as a dispersant (C) with respect to 100 parts of the non-volatile content of Synthesis Example A-1, a resin dispersant solution C-2 81.8 parts by weight of the non-volatile content , and then ethyl acetate was added to the solution to prepare a non-volatile content of 15.0%. And after fully stirring a solution, it disperse | distributed with the Eiger mill ("Mini model M-250 MKII" by Eiger Japan) using beads, and filtered, and the mixture whose non-volatile component is 15.0% was produced. .
Using the obtained mixture, an optical pressure-sensitive adhesive sheet as shown in Example 13 was obtained in the same manner as in Example 1.

Claims

An optical pressure-sensitive adhesive comprising a pressure-sensitive adhesive resin (A) having a weight average molecular weight of 200,000 to 2,000,000, a pigment (B), a dispersant (C), and a curing agent (D).

To 100 parts by weight of the adhesive resin (A), 0.00001 to 0.1 parts by weight of the pigment (B), 0.01 to 20 parts by weight of the curing agent (D),
The optical pressure-sensitive adhesive according to claim 1, comprising 10 to 1,000 parts by weight of the dispersant (C) with respect to 100 parts by weight of the pigment (B).

The optical pressure-sensitive adhesive according to claim 1 or 2 , wherein the dispersant (C) is a resin dispersant and has an acid value of 10 to 300 mgKOH / g.

The optical pressure-sensitive adhesive according to claim 3 , wherein the resin dispersant has a weight average molecular weight of 1,000 to 100,000.

The optical adhesive sheet provided with the adhesive layer formed from the optical adhesive of any one of Claims 1-4 .

The optical pressure-sensitive adhesive sheet according to claim 5, wherein an average particle diameter of primary particles of the pigment (B) constituting the optical pressure-sensitive adhesive contained in the pressure-sensitive adhesive layer is 1 to 500 nm.

The optical pressure-sensitive adhesive sheet according to claim 5 or 6 , wherein the total light transmittance in the visible light band of the pressure-sensitive adhesive layer is 80% or more and less than 100%.

Furthermore, the optical adhesive sheet of any one of Claims 5-7 provided with the base material.

The laminated body provided with the optical adhesive sheet provided with the adhesive layer formed from the optical adhesive in any one of Claims 1-4, and the transparent electrode layer.

A pigment dispersion in which a pigment (B) and a dispersant (C) are mixed is prepared, and the pigment dispersion and an adhesive resin (A) having a weight average molecular weight of 200,000 to 2,000,000 are mixed. A method for producing an optical pressure-sensitive adhesive.