JP2007308588A5 - - Google Patents

Claims (12)

A hydrophobic polyisocyanate (A), a vinyl polymer (B) having a nonionic group and an isocyanate group, and an aqueous medium, wherein the hydrophobic polyisocyanate (A) is the vinyl polymer. A water-based adhesive for plastic substrates, which is dispersed in an aqueous medium according to (B). The aqueous adhesive for plastic substrates according to claim 1, wherein the vinyl polymer (B) has a urethane bond. The vinyl polymer (B) is a hydrophobic polyisocyanate (b1), at least one active hydrogen-containing group selected from the group consisting of a hydroxyl group, a carboxyl group, an amino group, and an active methylene group, and a nonionic group The water-based adhesive for plastic substrates according to claim 1 or 2, which is obtained by reacting a vinyl polymer (b2) having The water-based adhesive for plastic substrates according to any one of claims 1 to 3, further comprising a urethane resin (C) having an anionic group. The plastic group according to claim 4, wherein the urethane resin (C) is contained in an amount of 30 to 200 parts by mass with respect to a total of 100 parts by mass of the hydrophobic polyisocyanate (A) and the vinyl polymer (B). Water-based adhesive for materials. A hydrophobic polyisocyanate (A), a vinyl polymer (B) having a nonionic group and an isocyanate group, and an aqueous medium, wherein the hydrophobic polyisocyanate (A) is the vinyl polymer. An aqueous adhesive for bonding a polarizer and a protective film, wherein the adhesive is dispersed in an aqueous medium according to (B). Furthermore, the aqueous adhesive for adhesion | attachment of the polarizer and protective film of Claim 6 formed by containing the urethane resin (C) which has an anionic group. A laminate comprising an adhesive layer formed by the water-based adhesive for plastic substrates according to any one of claims 1 to 5 between two or more plastic substrates which may be the same or different. body. The laminate according to claim 8 , wherein the plastic substrate is a substrate made of a resin having a cycloolefin structure. The laminate according to claim 8 , wherein the plastic substrate is a plastic film. A polarizing plate having an adhesive layer formed by an aqueous adhesive for bonding a polarizer and a protective film according to claim 7 or 8 between the polarizer and the protective film. Wherein the protective film is a film comprising a resin having a cycloolefin structure, the polarizing plate of claim 11.