Patent ID: 6720401
Filing Date: 2004-04-13
Classification: C08G,C09D,Y10S,Y10T

Abstract:
A coating composition to form a coating layer or film of a hydrophilic polyurethane resin having a moisture permeability and being non-porous, which comprises an isocyanate group-containing prepolymer obtained by reacting diphenylmethane diisocyanate with the following mixture of polyoxyalkylene polyols:a mixture of polyoxyalkylene polyols which contains at least 60 wt %, based on the mixture of polyoxyalkylene polyols, of a polyoxyethylene polyol, said polyoxyethylene polyol having at least three hydroxyl groups and having an oxyethylene group-content of at least 10 wt %, based on the polyoxyethylene polyol; wherein said mixture of polyoxyalkylene polyols satisfies 3.0wherein the mixture of polyoxyalkylene polyols excludes polyoxyalkylene polyols containing only two hydroxyl groups.