Process for the production of urea group-containing...

Details Process for the production of urea group-containing... Process for the production of urea group-containing...

C - Chemistry, Metallurgy

08

G

260/455.3

C08G 18/80 (2006.01) C07C 273/18 (2006.01) C08G 18/70 (2006.01) C08G 18/78 (2006.01)

Patent

CA 1246092

A PROCESS FOR THE PRODUCTION OF UREA GROUP-CONTAINING POLYISOCYANATES ABSTRACT OF THE DISCLOSURE The present invention is directed to a process for the production of urea group-containing, finely divided solid polyisocyanates by emulsifying or suspend- ing a urea group-free organic polyisocyanate in an excess of water so that said organic polyisocyanate amounts to about 1 to 65% by weight of the reaction mixture, said water containing about 0.01 to 5% by weight, based on the aqueous phase, of a protective colloid and reacting the organic polyisocyanate with water to yield a urea group-containing polyisocyanate.

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