Process for the production of combinations of organic polyisocya

Details Process for the production of combinations of organic polyisocya Process for the production of combinations of organic polyisocya

1984-02-27

1984-11-06

Welsh, Maurice J.

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 60, 528 61, 528 64, 528 75, C08G 1838

Patent

active

044813457

ABSTRACT:
Process for the production of water-hardenable compositions of organic polyisocyanates and polyamines containing at least partly blocked amino groups present as ketimines, the combinations essentially representing mixtures and optionally reaction products containing urea groups by mixing the organic polyisocyanates with the polyamines in such quantities that the equivalent ratio of isocyanate groups to blocked and free amino groups is between about 0.9:1 and 4:1 and reacting any free amino groups present with some of the isocyanate groups in the polyisocyanate to form ureas, characterized in that the polyamines containing at least partly blocked amino groups used are mixtures comprising

REFERENCES:
patent: 2498419 (1950-02-01), Haury
patent: 3420800 (1969-01-01), Haggis
patent: 3567692 (1971-03-01), Haggis et al.
patent: 3932357 (1976-01-01), Schmitt et al.
patent: 4009307 (1977-02-01), Erikson et al.
A.M. Paquin, Chem. Ber. 82, 316 (1949).

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