Aqueous dispersions of blocked polyisocyanates

Details Aqueous dispersions of blocked polyisocyanates Aqueous dispersions of blocked polyisocyanates

1991-07-23

1994-03-22

Miller, Edward A.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

C09K 300

Patent

active

052961605

ABSTRACT:
The present invention is directed to a process for the preparation of an aqueous dispersion of a blocked polyisocyanate by reacting an aqueously dispersed polyisocyanate having an isocyanate content of at least 12% by weight, based on the weight of the polyisocyanate, with a monofunctional blocking agent which is more reactive with isocyanate groups than water at an equivalent ratio of monofunctional blocking groups to isocyanate groups of 0.5:1 to 2:1. The present invention is also directed to the aqueously dispersed blocked polyisocyanates prepared by this process and to compositions containing these polyisocyanates and an isocyanate-reactive compound.

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