PRESSURE-SENSITIVE RE-RELEASABLE ADHESIVE COMPOSITION, COATING COMPOSITION AND INFORMATION CARRIER SHEET

PROBLEM TO BE SOLVED: To provide a pressure-sensitive re-releasable adhesive composition which has practically sufficient adhesive force and releasability, has the adhesive force that is hardly degraded with time, and has low tackiness and excellent blocking resistance.SOLUTION: A pressure-sensitive re-releasable adhesive composition contains a copolymerization dispersion body, where the copolymerization dispersion body is obtained by copolymerization of (a) 0.1-10 pts.mass of an ethylenically unsaturated carboxylic acid monomer, (b) 55-99.75 pts.mass of a (meth)acrylic acid ester monomer having 1 to 12 carbon atoms of an alkyl group, (c) 0.05-5 pts.mass of an alkoxysilane-containing ethylenically unsaturated monomer, and (d) 0.1-30 pts.mass of other ethylenically unsaturated monomer other than the monomer [(a)+(b)+(c)+(d)=100 pts.mass]. An average particle diameter of all particles contained in the copolymerization dispersion body is 0.1-1 μm, a tetrahydrofuran insoluble content of the copolymerization dispersion body is 50 mass% or less, and a sol content weight average molecular weight of the copolymerization dispersion body is 200,000-500,000.SELECTED DRAWING: None 【課題】実用上十分な接着力と剥離性とを有し、接着力が経時劣化し難く、且つ低タック性で耐ブロッキング性に優れる感圧型再剥離性接着剤組成物を提供すること。【解決手段】本発明の感圧型再剥離性接着剤組成物は、共重合分散体を含有し、該共重合分散体は、（ａ）エチレン系不飽和カルボン酸単量体０．１〜１０質量部と、（ｂ）アルキル基の炭素数１〜１２の（メタ）アクリル酸エステル単量体５５〜９９．７５質量部と、（ｃ）アルコキシシラン含有エチレン系不飽和単量体０．０５〜５質量部と、（ｄ）前記単量体以外の他のエチレン系不飽和単量体０．１〜３０質量部とが共重合してなる［但し、（ａ）＋（ｂ）＋（ｃ）＋（ｄ）＝１００質量部］。前記共重合分散体に含まれる全粒子の平均粒子径が０．１〜１μｍであり、前記共重合分散体のテトラヒドロフラン不溶分が５０質量％以下であり、前記共重合分散体のゾル分重量平均分子量が２０万〜５０万である。【選択図】なし