C - Chemistry – Metallurgy – 08 – K
Patent
C - Chemistry, Metallurgy
08
K
117/113, 402/131
C08K 5/16 (2006.01) C08G 18/10 (2006.01) C08G 18/38 (2006.01) C08G 18/80 (2006.01)
Patent
CA 1234828
Mo-2646 LeA 22,876 STORAGE STABLE OLIGOURETHANES WHICH ARE SELF CROSS-LINKING AT ELEVATED TEMPERATURE OR CAN BE CROSS-LINKED WITH ORGANIC POLYISOCYANATES, A PROCESS FOR THEIR PREPARATION AND THEIR USE AS BINDERS OR BINDER COMPONENTS ABSTRACT OF THE DISCLOSURE The present invention is directed to oligo- urethanes 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?N, -CO-NH2-, -CO-NHR3, -CO-NR? 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 oligo- urethanes and to their use for coating heat resistant substrates, optionally in admixture with organic polyisocyanates which may have masked isocyanate groups.
474414
Noll Klaus
Pedain Josef
Potter Terry
Aktiengesellschaft Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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