The Dow Chemical Company

Terry L Lamb

Robert B Turner

Kenneth W Skaggs

James K Jennings

Phillip L Wing

Substrates having successive layers of a cellular polyurethane and a noncellular polyurethane are prepared using certain siloxane-polyether block copolymers in the noncellular polyurethane formulation. The use of the block copolymer reduces or eliminates the formation of a bubble line at the interface of the polyurethane layers, thereby improving physical and cosmetic properties of the carpet.

Process for preparing polyurethane-backed substrate

A process for preparing a substrate backed with a polymer derived from an organic polyisocyanate, said process comprising the steps of

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Ringgold, GA, United States of America

Terry L Lamb