C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 18/80 (2006.01) C08G 18/08 (2006.01) C08G 18/70 (2006.01) C09D 175/04 (2006.01)
Patent
CA 2094618
The present invention relates to a heat-crosslinkable water-based coating composition containing as binder a) a water-soluble or water-dispersible polyol component and b) a water-soluble or water-dispersible blocked polyisocyanate which has an average NCO functionality of 2.0 to 2.6 and is based on the reaction product of b1) a polyisocyanate mixture having an average NCO func- tionality of 2.5 to 3.5 and containing (i) at least 15% by weight of an organic diisocyanate, b2) a blocking agent for isocyanate groups in an amount of 50 to 80 equivalent-%, based on the isocyanate groups of component b1) and b3) an aliphatic monohydroxymonocarboxylic acid in a quantity of 20 to 50 equivalent-%, based on the isocyanate groups of component b1) and the hydroxyl groups of component b3), wherein the equivalent ratio, based on the isocyanate- reactive groups of blocking agent b2) and the hydroxyl groups of component b3) to the isocyanate groups of component b1) is at least 0.9:1,
Mager Dieter
Muller Heino
Pedain Josef
Schonfelder Manfred
Aktiengesellschaft Bayer
Norton Rose Or S.e.n.c.r.l. S.r.l./llp
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