Aqueous dispersions of encapsulated polyisocyanates

Details Aqueous dispersions of encapsulated polyisocyanates Aqueous dispersions of encapsulated polyisocyanates

C - Chemistry, Metallurgy

08

L

C08L 79/00 (2006.01) C08G 18/08 (2006.01) C08G 18/50 (2006.01) C08G 18/70 (2006.01) C08G 18/80 (2006.01)

Patent

CA 2064335

Mo3586 PU-308 AQUEOUS DISPERSIONS OF ENCAPSULATED POLYISOCYANATES ABSTRACT OF THE DISCLOSURE The present invention is directed to an aqueous dispersion of an encapsulated polyisocyanate which contains unreacted isocyanate groups and is prepared by a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and b) reacting the dispersed polyisocyanate with a polyamine having primary and/or secondary amino groups and a molecular weight of 400 or less in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of at least 0.05:1Ø The present invention is also directed to aqueous compositions containing the previously described encapsulated polyisocyanate and an isocyanate-reactive compound. Mo3586

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