C - Chemistry – Metallurgy – 09 – D
Patent
C - Chemistry, Metallurgy
09
D
C09D 175/12 (2006.01) C08G 18/32 (2006.01) C08G 18/72 (2006.01) C09D 175/02 (2006.01)
Patent
CA 2136372
The present invention relates to a coating composition having an improved pot life without a corresponding increase in dry time when cured under ambient conditions which contains a) a polyisocyanate component, b) an aldimine based on the reaction product of a polyamine having 2 or more primary amino groups with an aldehyde corresponding to the formula: O=CHCH(R1)(R2) wherein R1 and R2 may be the same or different and represent optionally substituted hydrocarbon radicals, or R1 and R2 together with the .beta.-carbon atom form a cycloaliphatic or heterocyclic ring and c) 0.001 to 5 weight percent, based on the weight of components a) and b), of a tin(IV) compound which is a catalyst for the reaction between isocyanate groups and hydroxyl groups, wherein components a) and b) are present in an amount sufficient to provide an equivalent ratio of isocyanate groups to aldimine groups of 0.5:1 to 20:1.
Hicks Sharon D.
Wicks Douglas A.
Yeske Philip E.
Corporation Bayer
Miles Inc.
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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