PHOTOCURABLE ADHESIVE RESIN COMPOSITION

To provide a solvent-free photocurable adhesive resin composition which can be used for an adhesive tape having good visibility, high adhesive strength, step followability and reworkability in laminating an image display member and a cover member.SOLUTION: There is provided a photocurable adhesive r...

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1. Verfasser: MIZUMA KENTA
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a solvent-free photocurable adhesive resin composition which can be used for an adhesive tape having good visibility, high adhesive strength, step followability and reworkability in laminating an image display member and a cover member.SOLUTION: There is provided a photocurable adhesive resin composition which comprises: (A) a compound having a (meth)acrylic group having a hydrogenated polybutadiene structure having a weight average molecular weight of 10000 to 100000; (B) a monofunctional (meth)acrylate monomer containing at least (b1) a monofunctional (meth)acrylate monomer having a hydroxyl group and (b2) an alicyclic monofunctional (meth)acrylate monomer having no hydroxyl group; (C) a polyfunctional (meth)acrylate monomer; and (D) a photopolymerization initiator, wherein the content of the (D) is 0.05 to 0.50 wt.% based on the total composition.SELECTED DRAWING: Figure 3 【課題】画像表示部材とカバー部材との貼り合わせにおいて、良好な視認性、高い粘着力、段差追従性、リワーク性を有する粘着テープに用いることができる無溶剤の光硬化性粘着樹脂組成物を提供する。【解決手段】重量平均分子量が10,000〜100,000の水素添加したポリブタジエン骨格を持つ(メタ)アクリル基を有する化合物(A)と、水酸基を有する単官能(メタ)アクリレートモノマー(b1)と、水酸基を有さない脂環式の単官能(メタ)アクリレートモノマー(b2)を少なくとも含む単官能(メタ)アクリレートモノマー(B)と、多官能(メタ)アクリレートモノマーと(C)と、光重合開始剤(D)と、を含み、組成物全体に対する前記(D)の含有量が0.05〜0.50重量%であることを特徴とする光硬化性粘着樹脂組成物である。【選択図】図3