Patent ID: 7662447

Claim:
An adhesive for polarizing plates used for forming an adhesive layer in a polarizing plate in which a polarizer and a transparent protective film are adhering with each other via the adhesive layer, wherein the adhesive for polarizing plates is an aqueous solution containing a polyvinyl alcohol-based resin having an acetoacetyl group and a crosslinking agent, wherein a degree of modification of the polyvinyl alcohol-based resin by the acetoacetyl group is from 2 to 7 mol. %, and the crosslinking agent is mixed in the range of more than 30 parts by weight and not more than 46 parts by weight relative to 100 parts by weight of the polyvinyl alcohol-based resin, and wherein a pH of the aqueous solution is in the range of from 2.2 to 4.3.