Patent ID: 7232859
Filing Date: 2007-06-19
Classification: C08G,Y10T

Abstract:
1. An aqueous polyurethane dispersion consisting of a polyurethane prepolymer produced from the reaction of an excess of a polyisocyanate and a molecule having hydrogen active moieties, optionally a chain extender, and optionally a surfactant, wherein the polyisocyanate consists of (i) trans-1,4-bis(isocyanatomethyl)cyclohexane or (ii) an isomeric mixture of two or more of cis-1,3-bis(isocyanatomethyl)cyclohexane, trans-1,3-bis(isocyanatomethyl)cyclohexane, cis-1,4-bis(isocyanatomethyl)cyclohexane and trans-1,4-bis(isocyanatomethyl)cyclohexane, with the proviso said isomeric mixture consists of at least about 5 weight percent of said trans-1,4-bis(isocyanatomethyl)cyclohexane, wherein the dispersion further consists of from about 0.01 to about 0.5 parts organometallic compounds per 100 parts polyurethane prepolymer, by weight.