Void-free molded polyurethane articles with surface attachment s

Details Void-free molded polyurethane articles with surface attachment s Void-free molded polyurethane articles with surface attachment s

1986-12-17

1988-01-05

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including fastener for attaching to external surface

264 464, 428100, 428101, 428290, 428297, B29C 6700, B32B 306

Patent

active

047176113

ABSTRACT:
In a method for making a molded polyurethane article having a nonwoven material secured to the article's surface which comprises placing the nonwoven material on the internal surface of a mold, adding and foaming a polyurethane composition in the mold and recovering the molded polyurethane article with the nonwoven material attached to the surface of the article, the improvement which comprises coating the nonwoven material with a composition consisting essentially of a fully hydrolyzed polyvinyl alcohol, an organic polyisocyanate and a catalyst for the urethane reaction, and curing the coating on the nonwoven material prior to adding and foaming the polyurethane composition in the mold.

REFERENCES:
patent: 3414928 (1968-12-01), Lemelson
patent: 3861993 (1975-01-01), Guthrie
patent: 4216257 (1980-08-01), Schams et al.
patent: 4563380 (1986-01-01), Black et al.

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