Patent ID: 6569944
Filing Date: 2003-05-27
Classification: C08G,Y10T

Abstract:
A process for preparing urethanes containing (meth)acryloyl groups that are suitable as binders for powder coatings, which comprises reactingi) a polyisocyanate component with ii) an isocyanate-reactive component that comprises a) at least one monohydric alcohol containing (meth)acryloyl groups and b) at least one compound that is free from (meth)acryloyl groups and contains isocyanate-reactive groups, in iii) a melt of at least one compound containing (meth)acryloyl groups, which is crystalline in the solid state and has a melting point of 30 to 100Â° C. and a dynamic viscosity at 111Â° C. of less than 10 PaÂ·s, at elevated temperature until the content of NCO has dropped below 0.5 wt. %.