US Patent 7569272 Adhesive composition, adhesive sheet and adhesive optical component

An adhesive composition which is the crosslinked product of components which comprise (C) a copolymer of a (meth)acrylic ester having a weight-average molecular weight of 1,000,000 or greater, (D) 5 to 100 parts by weight per 100 parts by weight of component (C) of an oligomer of (meth)acrylic esters having a weight-average molecular weight of 1,000 to 10,000 and (E) 0.001 to 50 parts by weight per 100 parts by weight of component (C) of a crosslinking component comprising a difunctional crosslinking agent. The adhesive composition exhibits excellent adhesion with adherents, and stress relaxation and follows changes in the dimensions of substrates.