Blocked polyisocyanates prepared from partially trimerized...

Details Blocked polyisocyanates prepared from partially trimerized... Blocked polyisocyanates prepared from partially trimerized...

C - Chemistry, Metallurgy

07

D

C07D 251/34 (2006.01) B05D 3/00 (2006.01) C08G 18/42 (2006.01) C08G 18/62 (2006.01) C08G 18/79 (2006.01) C08G 18/80 (2006.01) C09D 161/28 (2006.01)

Patent

CA 2089011

The present invention relates to a blocked polyisocyanate which is based on the reaction product of a polyisocyanate with a reversible, monofunctional blocking agent for isocyanate groups, wherein the polyisocyanate is prepared by trimerizing 5 to 85% of the isocyanate groups of a cyclic organic diisocyanate having (cyclo)aliphatically bound isocyanate groups and contains i) an isocyanurate group-containing polyisocyanate and ii) at least 5% by weight, based on the weight of the polyisocyanate, of unreacted diisocyanate. The present invention also relates to a one-component coating composition containing this blocked polyisocyanate and a polyhydroxyl polyacrylate and/or a polyhydroxyl polyester. Finally, the present invention relates to substrates coated with this coating composition.

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