Polyurea polymers prepared from urea containing prepolymers

Details Polyurea polymers prepared from urea containing prepolymers Polyurea polymers prepared from urea containing prepolymers

1986-01-31

1987-08-11

Kight, John

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521163, 521167, 528 64, 528 68, C08G 1814, C08G 1832, C08G 1850

Patent

active

046862420

ABSTRACT:
This invention comprises a process whereby an amine functional compound having an equivalent weight of at least about 400 is reacted with an excess of a polyisocyanate to form an isocyanate-terminated prepolymer or quasi prepolymer, which polymer or quasi prepolymer is reacted with an isocyanate-reactive material which is preferably a relatively low equivalent weight polyol or mixture thereof with an additional amount of said amine functional compound or a relatively high equivalent weight polyol to form a polyurea containing polymer which is preferably non-cellular or microcellular.

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patent: 3666788 (1972-05-01), Rowton
patent: 4157427 (1979-06-01), Ferber
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patent: 4433067 (1984-02-01), Rice et al.
patent: 4444910 (1984-04-01), Rice et al.
patent: 4474900 (1984-10-01), Dominguez
Chem. Abs. 103: 88890u.

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