ADHESIVE COMPRISING HIGH MOLECULAR WEIGHT COPOLYMER, LOW MOLECULAR WEIGHT COPOLYMER OBTAINED BY RADICAL COPOLYMERIZATION OF CARBOXYL GROUP-CONTAINING MONOMER AND OTHER MONOMERS IN THE PRESENCE OF THE COPOLYMER AND A MULTIFUNCTIONAL COMPOUND IN SPECIFIC RATIO, PREPARATION METHOD THEREOF AND OPTICAL MEMBER USING THE ADHESIVE

摘要

PURPOSE: An adhesive, its preparation method and an optical member using the adhesive are provided, the prevent the foaming or stripping due to the heat or moisture and the generation of spots on a liquid crystal device using the optical member by relieving the stress concentration due to the stretching of a polarizer. CONSTITUTION: The adhesive comprises 100 parts by weight of (A) a copolymer which is obtained by radical copolymerizing (a) a monomer having a reactive functional group and an ethylenically unsaturated double bond and (b) a monomer copolymerizable with the monomer (a) and having an ethylenically unsaturated double bond different from that of the monomer (a), and has a weight average molecular weight of 1,000,000-2,000,000; 20-100 parts by weight of (B) a copolymer which is obtained by radical copolymerizing (c) a monomer having a carboxyl group and an ethylenically unsaturated double bond and (d) a monomer copolymerizable with the monomer (c) and having an ethylenically unsaturated double bond different from that of the monomer (c) in the presence of the copolymer (A), and has a weight average molecular weight of 10,000-100,000; and 0.003-3 parts by weight of (C) a multifunctional compound having at least two reactive functional groups capable of reacting with the copolymer (A) and/or the copolymer (B).