Patent ID: 6750291
Filing Date: 2004-06-15
Classification: C08G,C08L

Abstract:
A film-forming agent characterized in comprising 50Ëœ99% by weight of the following polyurethane (A) and 1Ëœ50% by weight of the following addition polymerization polymer (B) having a functional group of carboxylic acid derivative:(A) Polyurethane with weight average molecular weight of 10,000Ëœ500,000, which is prepared by polymerization of the following ingredient (a-1), (a-2), and (a-3), and represented with the following formula 1: (a-1) polyethylene glycol; (a-2) polydiol with hydroxyl groups at both ends, which has stronger hydrophobicity than the said (a-1); and (a-3) diisocyanate having isocyanate at both ends and (B) The addition polymerization polymer with a functional group of carboxylic acid derivative has weight average molecular weight of 10,000Ëœ800,000 which contains carboxylic acid alkyl ester and/or carboxylic acid alkyl amide and/or carboxylic acid alkyl amino alkyl ester on main chain or side chain.