Patent ID: 8207286
Filing Date: 2012-06-26
Classification: B32B,C08G

Abstract:
1. A method for preparing a polyurethane from reaction components comprising: (a) reacting about 1 equivalent of at least one polyisocyanate and about 0.3 to about 0.4 equivalents of butanediol or cyclohexane dimethanol to form an isocyanate functional urethane prepolymer; and (b) reacting the isocyanate functional urethane prepolymer, about 0.1 to about 0.3 equivalents of trimethylolpropane, about 0.4 to about 0.5 equivalents of butanediol or cyclohexane dimethanol; and about 0.01 to about 0.3 equivalents of at least one polycarbonate diol, wherein the reaction product components are essentially free of polyether polyol.