Patent ID: 6716531
Filing Date: 2004-04-06
Classification: C08G,C09D,Y10T

Abstract:
A marine component for mounting on a water vessel, comprising a substrate coated with a polyurethane urea composition, wherein said coating is prepared by the process of mixinga) an A-side of a polyurethaneurea coating comprising an isocyanate-terminated prepolymer prepared by reacting an excess of a diisocyanate with at least one hydrophobic polyoxyalkylene diol having a molecular weight of from 400 Da to 4000 Da; with b) a B-side containing a diamine and a hydrophobic polyoxyalkylene diol having a molecular weight determined by its hydroxyl number of from 200 Da to 4000 Da, in a weight ratio of diamine to hydrophobic polyoxyalkylene diol of from 1:10 to 10:1; to form a curable polyurethaneurea mixture having an NCO/OH ratio of from 0.85 to 1.15; c) spraying said curable mixture onto said substrate, and curing said mixture to form a polyurethaneurea coating on said substrate.