Patent ID: 8071659
Filing Date: 2011-12-06
Classification: B33Y,C08G,C09D,Y10T

Abstract:
1. A process for preparing radiation-curing allophanates having residual monomer contents of less than 0.5% by weight and an NCO content of less than 1% by weight, the process comprising: 1) preparing NCO-group-containing urethanes having radiation-curing groups by reacting: 2) reacting the NCO-group-containing urethanes having radiation-curing groups subsequently, without further addition of compounds containing isocyanate groups, in the presence of: the ratio of NCO groups of the compounds from A) to the OH groups of the compounds from B) and, where used, C) being 1.45: 1.0 to 1.1 : 1.0.