FUNCTIONAL ADHESIVE SHEET

• Main Authors: UEKI AYUMI, FUKUHARA KUNIAKI, TAMURA KEI
• Format: Patent
• Language: English; Japanese
• Published: 16.02.2015
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; CHEMISTRY; DYES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; POLISHES; USE OF MATERIALS AS ADHESIVES

PROBLEM TO BE SOLVED: To provide a functional adhesive sheet which is excellent in flexibility and heat resistance even when functional fine particle is packed higher than conventional sheets.SOLUTION: An adhesive sheet has an adhesive layer composed of an adhesive composition comprising (A) a (meth)acrylic resin, (B) a cross-linking agent, (C) a functional fine particle and (D) a plasticizer. (B) comprises (B-1) a (meth)acrylic cross-linking agent of a functional group equivalent of 200-1,500 g/eq and a mass average molecular weight of 2,000-15,000 having a functional group reacting with (A) and (B-2) a cross-linking agent of a functional group equivalent of 50-1,000 g/eq and a mass average molecular weight of 200-1,000, in a (B-1) to (B-2) blend mass ratio 90:10 to 60:40. 【課題】従来よりも機能性微粒子を高充填した場合においても柔軟性と耐熱性に優れた機能性粘着シートを提供する。【解決手段】（Ａ）（メタ）アクリル系樹脂と、（Ｂ）架橋剤と、（Ｃ）機能性微粒子と、（Ｄ）可塑剤と、を含有する粘着剤組成物から形成された粘着剤層を有する粘着シートである。（Ｂ）が、（Ｂ−１）として（Ａ）と反応する官能基を有し、官能基当量が２００〜１，５００ｇ／ｅｑ、質量平均分子量が２，０００〜１５，０００である（メタ）アクリル系架橋剤と、（Ｂ−２）として（Ａ）と反応する官能基を有し、官能基当量が５０〜１，０００ｇ／ｅｑ、質量平均分子量が２００〜１，０００である架橋剤と、を含有し、かつ、（Ｂ−１）と（Ｂ−２）の配合比が質量比で９０：１０〜６０：４０の範囲である。【選択図】図１