| abstract |
[PROBLEMS] To provide a pressure-sensitive adhesive composition which can improve durability while maintaining good reworkability when used for bonding an optical functional film to a liquid crystal cell. [Solution] A copolymer of a polymerizable unsaturated monomer containing a (meth) acrylic acid ester monomer, and at least one of an organosiloxane represented by the formula [1a] and a hydrolyzate thereof. (X is an monovalent hydrocarbon group having an acid anhydride group, Y is a group 1 having the ether group in the poly-hydrocarbon, Z is the singer group hydrolyzable monovalent hydrocarbon having a silyl group, R 1 is each independently a hydrogen atom, M 1 is , independent from each other, X, Y, a group selected from Z 1, and R, a, b, c, d, respectively, indicate integers of 0 to 100, and when a is zero, with at least one of M 1 X And c is an integer of 1? C? 100, and when c is 0, at least one of M 1 is Z and a is an integer of 1? A? |