Patent ID: 6624282
Filing Date: 2003-09-23
Classification: C08G,D06N

Abstract:
A reactive composition comprising:(A) an NCO prepolymer prepared i) by reacting an aliphatic and/or cycloaliphatic polyisocyanate with a polyhydroxyl compound at an NCO to OH ratio of from 4:1 to 15:1, and ii) removing unreacted isocyanate to give a monomeric polyisocyanate content of less then 2% by weight, said prepolymer having an NCO content of from 2 to 4% by weight and (B) an amine-free chain extender comprising at least 50 equivalent percent, relative to the NCO-reactive groups of the chain extender, of a compound melting between 50Â° C. and 160Â° C. and having the formula (I) HOâ€”Xâ€”Yâ€”Xâ€”OHâ€ƒâ€ƒ(I) â€ƒwherein V denotes 1,4-, 1,3-, or 1,2-phenylene and X denotes methylene or â€”OCH2CH2-, wherein the oxygen atom is bonded to the group Y, and (C) 0 to 20% by weight, relative to component (A), of one or more inert organic solvents, and wherein the equivalent ratio of the free NCO groups of component (A) to the NCO-reactive groups of component (B) is 0.90 to 135.