Patent ID: 8455101
Filing Date: 2013-06-04
Classification: B32B,C08G,C08J,Y10T

Abstract:
1. A process for producing a polyurethane lamination resin, comprising: mixing a) an isocyanate prepolymer comprised of diphenylmethane diisocyanate in reacted form and a difunctional polyether in reacted form, b) a polyphenylene polymethylene polyisocyanate, c) a trifunctional polyetherol having an average molar mass of from 350 to 600 g/mol, d) a thermoactivatable capped catalyst, e) optionally, at least one of a chain extender and a crosslinking agent, f) 0.5 to 5 parts by weight of an aluminosilicate water-absorber, relative to the total weight of components c), d), and f), and, if present, e) and g), and g) optionally, other additives and reacting components a), b), c) and optionally e) in the presence of component d) to make a polyurethane lamination resin.