Patent Number: 7,709,578

Title: Adhesive for polarizing plate, polarizing plate, manufacturing method therefor, optical film and image display

Abstract: An adhesive of the present invention is used for polarizing plate to provide a transparent protective film on at least one side of a polarizer and comprises a resin solution comprising a polyvinyl alcohol-based resin, a crosslinking agent and a leveling agent containing an acetylene skeleton-containing compound, wherein 0.01 to 10 parts by weight of the leveling agent is added to 100 parts by weight of the polyvinyl alcohol-based resin. The adhesive for polarizing plate can provide a satisfactory wettability when applied to transparent protective films and allows the production of polarizing plates to have water resistance at high temperature and satisfactory optical properties.

Inventors: Shinagawa; Masashi (Ibaraki, JP), Sugino; Akiko (Ibarak, JP), Fujita; Yutaka (Ibarak, JP), Satake; Masayuki (Ibaraki, JP)

Assignee: Nitto Denko Corporation

International Classification: C08F 8/00 (20060101); G02B 5/30 (20060101)

Expiration Date: 5/04/12018