Reaction injection molding polyurea resin composition

Details Reaction injection molding polyurea resin composition Reaction injection molding polyurea resin composition

1992-04-29

1993-03-09

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 51, 521159, 528 68, C08G 1814

Patent

active

051928140

ABSTRACT:
A polyurea resin molding composition for reaction injection molding use which comprises (a) a polyoxyalkylenepolyamine, (b) an aromatic polyamine and/or a xylylenediamine and (c) a polyisocyanate, wherein either one or both of components (a) and (b) have been modified by a Michael reaction with an unsaturated compound of the formula CH.sub.2 .dbd.C(R)--Y wherein R is H or CH.sub.3 and Y is an electron attracting group. The use of such modified polyamine(s) improves in-mold flow and green strength characteristics.

REFERENCES:
Grigsby et al., "Modified Polyetheramines in RIM", Journal of Elastomers and Plastics, vol. 23, pp. 54-65, Jan., 1991.

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