Aqueous compositions containing an at least partially...

Details Aqueous compositions containing an at least partially... Aqueous compositions containing an at least partially...

C - Chemistry, Metallurgy

08

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C08L 75/04 (2006.01) C03C 25/26 (2006.01) C03C 25/32 (2006.01) C08G 18/08 (2006.01) C08G 18/09 (2006.01) C08G 18/28 (2006.01) C08G 18/30 (2006.01) C08G 18/70 (2006.01) C08G 18/80 (2006.01) D06M 15/564 (2006.01)

Patent

CA 2072860

Mo3658 MD-91-47-PU AQUEOUS COMPOSITIONS CONTAINING AN AT LEAST PARTIALLY BLOCKED POLYISOCYANATES AND A TRIMERIZATION CATALYST AND COATINGS AND BINDERS PREPARED THEREFROM ABSTRACT OF THE DISCLOSURE The present invention relates to an aqueous composition containing a) an at least partially blocked, aqueously dispersed polyisocyanate i) having an isocyanate content prior to blocking of at least 12% by weight, based on the weight of the unblocked polyisocyanate and ii) containing at least 2 equivalent percent, based on the total equivalents of isocyanate groups, of blocked isocyanate groups, and b) a trimerization catalyst. The present invention also relates to coatings or binders prepared by heating the aqueous compositions to evaporate water and initiate trimerization. Mo3658

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