Patent ID: 6423777
Filing Date: 2002-07-23
Classification: C08G

Abstract:
A polyaddition compound which is solid below 40Â° C. and liquid above 125Â° C. and hasa) a concentration of free isocyanate groups (calculated as NCO; molecular weight=42) of 2.1 to 6.0 wt. % with an average isocyanate functionality of 2.1 to 8.0, b) a concentration of uretdione groups (calculated as C2N2O2; molecular weight=84) of 10 to 18 wt. %, c) a concentration of urethane groups (calculated as â€”NHâ€”COâ€”O; molecular weight=59) of 10 to 20 wt. % and d) a concentration of ester groups â€”COâ€”O (calculated as â€”COâ€”O; molecular weight=44) and/or carbonate groups â€”Oâ€”COâ€”O (calculated as â€”COâ€”O; molecular weight=44) of 1 to 17 wt. % wherein the uretdione groups are not derived from pure 1-isocyanato-3,3,5-trimethyl-5-isocyantomethylcyclohexane by trialkylphosphine catalysis, and the ester and/or carbonate groups are not derived from neopentylglycol hydroxypivalate.