Patent ID: 8357768
Filing Date: 2013-01-22
Classification: C08G,Y10T

Abstract:
1. A thermoplastic polyurethane (TPU) comprising soft segment structural units and hard segment structural units characterized in that it comprises: a. soft segment units in an amount of from about 30 to about 70 weight percent based on total thermoplastic polyurethane weight, wherein the soft segment units comprise units of polycaprolactone diol, and b. hard segment units in an amount of from about 30 to about 70 weight percent based on total thermoplastic polyurethane weight, which hard segment comprises structural units of: b.1 chain extender and b.2 diisocyanate; wherein the chain extender units consist essentially of wherein the molar ratio of the isocyanate functional units to the sum of the isocyanate-reactive functional units is from about 0.95:1 to about 1.10:1, and wherein the thermoplastic polyurethane has less than 30% haze as measured by ASTM D 1003-95 and has a hardness greater than about 80A as measured using the Shore A scale and less than about 75D as measured using the Shore D scale.