The Dow Chemical Company

Don H Kelley

Louis W Meyer

Larry W Mobley

Linda M McKinney

Sehon Lester Warneke

Billy Quock

This invention is a polyurethane composition useful for backing textiles comprising the catalyzed reaction product of a polyurethane-forming composition which comprises:

Process for preparing polyurethane-backed textiles

This invention is an improvement in a process for preparing a polyurethane backed substrate whereby a reacting polyurethane forming mixture comprising at least one polyahl and at least one polyisocyanate as applied to a substrate and subsequently curing thereon to form an attached polyurethane backing. The improvement which is this invention comprises employing an organoiron or organobismuth catalyst for said polyurethane forming mixture. The organoiron or organobismuth catalyst is employed in an amount such that the polymer forming mixture exhibits the viscosity of not greater than about 20,000 cps 2 minutes after the polyahl and polyisocyanates are contacted in the presence of said catalyst at 20.degree.-50.degree. C. and the polyurethane forming mixture cures to a tack free state at an elevated temperature in the presence of said catalyst in less than about 8 minutes.

Polyurethane carpet backing catalyzed with organoiron and organobismuth

Menthanediamine, isophorone diamine and the like compounds have been discovered to be an effective substitute for 4,4'-methylenebis(2-chloroaniline) in the preparation of flexible polyurethane foams. This substituted crosslinker is not suspected of being carcinogenic.

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Lake Jackson, TX, United States of America

Don H Kelley