| abstract |
(57) [Summary] [Object] To provide an acrylic pressure-sensitive adhesive composition having excellent heat resistance and moisture resistance. [Structure] (A) A weight average molecular weight (Mw) containing an alkyl (meth) acrylate having an alkyl group having 1 to 12 carbon atoms as a main component is 500,000 or more, and the ratio of the weight average molecular weight to the number average molecular weight (Mw / (Mn) 4.0 or less acrylic copolymer, (B) polyfunctional compound, at least one or more cross-linking agent selected from the group consisting of organic metal compounds and metal salts, and (C) organic phosphite compound An acrylic adhesive composition comprising |