C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
C07D 251/34 (2006.01) C07C 271/60 (2006.01) C07D 211/94 (2006.01) C07D 401/00 (2006.01) C07D 403/00 (2006.01) C08G 18/28 (2006.01) C08G 18/32 (2006.01) C08G 18/38 (2006.01) C08G 18/79 (2006.01) C08G 18/80 (2006.01) C09D 175/04 (2006.01)
Patent
CA 2116167
The present invention relates to a blocked poly--isocyanate which is the reaction product of a polyisocyanate with i) 60 to 99.9 equivalent percent, based on the equivalents of isocyanate groups of the polyisocyanate prior to blocking, of an oxime or lactam blocking agent for isocyanate groups and ii) 0.1 to 40 equivalent percent, based on the equivalents of isocyanate groups of the polyisocyanate prior to blocking, of hydrazine and/or a compound which is soluble in either the polyisocyanate, the blocking agent or an optional organic solvent for the polyisocyanate and contains the group, H(R)N-NR-CO-, wherein the carbonyl group is bound to carbon or nitrogen and R represents hydrogen or an optionally substituted hydrocarbon radical. The present invention also relates to a one-component coating composition containing this blocked polyisocyanate and a compound containing at least two isocyanate-reactive groups and to coated substrates prepared from this one-component coating composition which additionally contains an acid.
Potter Terry A.
Schmitt Peter D.
Shaffer Myron W.
Venham Lanny D.
Corporation Bayer
Miles Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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