Reaction injection molding polyurea resin composition.

摘要

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 CH2 = C(R)-Y wherein R is H or CH3 and Y is an electron attracting group. The use of such modified polyamine(s) improves in-mold flow and green strength characteristics.