Patent ID: 6399718
Filing Date: 2002-06-04
Classification: C08G,C09D,Y10S

Abstract:
A polyurethane resin (P) obtained by(A) in a first reaction stage reacting (a) one or more compounds selected from the group consisting of di-isocyanates, polyisocyanates, and mixtures thereof and (b) one or more compounds having at least one group which ensures dispersibility in water and more than one group which is reactive toward isocyanate groups, to give an intermediate (A) having free isocyanate groups and having urethane groups,(B) in a second reaction stage adding (d) one or more monoisocyanates to the intermediate (A) to obtain a mixture (B), and(C) subsequently reacting in a third reaction stage the resulting mixture (B) with one or more hydroxyl-containing polymers (D) to give the polyurethane resin (P), using less than 20% by weight, based on the weight of the polyurethane resin, of polyalkylene oxide diols and/or polyalkylene oxide polyols to prepare the polyurethane resin.