Patent ID: 7008979
Filing Date: 2006-03-07
Classification: C08K,C09D,Y10T

Abstract:
1. An aqueous coating composition for providing the surface of an object with a durable hydrophilic coating comprising: a) a multifunctional modified polyurethane carrier dispersed or emulsified in water, in a concentration from about 0.5 to about 15 wt %, based on the total weight of the coating composition, wherein said carrier forms a polymeric matrix upon drying or curing said coating composition; b) a hydrophilic water-soluble organic monomer, oligomer, prepolymer, polymer or copolymer derived from N-vinylpyrrolidone, in a concentration from about 0.001 to about 10 wt %, based on the total weight of the coating composition; c) a multifunctional aqueous colloidal metal oxide, in a concentration from about 0.01 to about 25 wt %, based on the total weight of the coating composition; and d) a multifunctional crosslinker; wherein a coating of said composition is a durable hydrophilic coating upon drying or curing said coating.