Process for the production of urea group-containing polyisocyana

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

1985-10-03

1987-07-14

Kight, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From reactant having at least one -n=c=x group as well as...

528 48, C08G 1800, C08G 1808

Patent

active

046803670

ABSTRACT:
The present invention is directed to a process for the production of urea group-containing, finely divided solid polyisocyanates by emulsifying or suspending a urea group-free organic polyisoycanate 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 yeild a urea group-containing polyisocyanate.

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patent: 2757184 (1956-07-01), Pelley
patent: 2757185 (1956-07-01), Barthel
patent: 2818404 (1957-12-01), Hill
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patent: 3428592 (1969-02-01), Yonker
patent: 3906019 (1975-09-01), Campbell et al.
patent: 4032516 (1977-06-01), McGarr
patent: 4049632 (1977-09-01), Magnusson et al.
patent: 4293679 (1981-10-01), Cogliano
patent: 4403083 (1983-09-01), Marans et al.

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