Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – To produce composite – plural part or multilayered article
Patent
1994-12-07
1996-07-16
Woo, Jay H.
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
To produce composite, plural part or multilayered article
2643286, 264331160, 264331190, 264300, 521124, 521163, 521167, 528 68, 528 745, 528 75, B29C 4514, C08G 1828
Patent
active
055364659
ABSTRACT:
The present invention relates to a process for the preparation of a SRIM molded product wherein the mold cavity has minimum dimensions of 1000 mm.times.100 mm.times.3.5 mm. The reaction mixture contains an isocyanate component and an isocyanate reactive component at an isocyanate index of from about 90 to about 400. The reinforcing fiber mat is present in an amount of from 50 to 65% by weight, based on the combined weight of the reaction mixture and the reinforcing fiber mat. In particular, the isocyanate component is 1) a polymethylene poly(phenyl isocyanate) having an isocyanate group content of from 25 to 40% by weight, and a diisocyanate content of 45-55% by weight; and 2) the isocyanate-reactive component comprises a) from about 1 to 15% by weight, based on the total weight of the isocyanate reactive component, of a fatty acid, b) from about 0.5 to 10% by weight, based on the total weight of the isocyanate-reactive component, of a zinc-carboxylate, and c) a polyol component.
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Bayer Corporation
Brown N. Denise
Gil Joseph C.
Smith Duane S.
Woo Jay H.
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