Patent ID: 6642343
Filing Date: 2003-11-04
Classification: C08G,C09D,Y10T

Abstract:
A polyurethane resin being the reaction product of at least one diisocyanate and components having isocyanate reactive functional groups, said components comprising a first group of at least one polyol, a second group of at least one polyol and a third group of at least one polyol, wherein all polyols of said first group have an average molecular weight from 1000 to 10000 g/mol, wherein all polyols of said second group have an average molecular weight in excess of 10000 up to 20000 g/mol, wherein all polyols of said third group have an average molecular weight equal to or less than 800 g/mol and wherein the equivalent ratio of the diisocyanate to the components having isocyanate reactive functional groups is selected such that essentially all of the isocyanate groups of the diisocyanate are present as the reaction product with one of said isocyanate reactive functional groups.