SELF CROSS-LINKING AT ELEVATED TEMPERATURES OR WITH ORGANIC POLYISOCYANATES CROSS-LINKABLE STORAGE STABLE OLIGOURETHANES AND A PROCESS FOR THEIR PREPARATION AS WELL AS THEIR APPLICATION AS ADHESIVE OR ADHESIVE COMPONENT

摘要

The present invention is directed to oligourethanes which are stable in storage at room temperature and either self cross-linking at elevated temperatures or capable of being cross-linked with organic polyisocyanates which may have at least partially masked isocyanate groups, (a) containing about 0.1 to 3% by weight of tertiary amine nitrogen atoms in the form of structural units corresponding to the following formula attached through urethane groups either in end positions and/or within the molecule: IMAGE wherein R1 represents hydrogen or an alkyl group having 1 to 4 carbon atoms, R2 represents -C 3BOND N, -CO-NH2-, -CO-NHR3, -CO-NR23 or -COOR3 and R3 represents a monovalent hydrocarbon group optionally carrying inert substituents, (b) up to about 15% by weight of isocyanate groups and (c) up to about 15% by weight of masked isocyanate groups. The present invention is additionally directed to a process for the preparation of these oligourethanes and to their use for coating heat resistant substrates, optionally in admixture with organic polyisocyanates which may have masked isocyanate groups.