The Dow Chemical Company

Dow Global Technolgoies LLC

Michael Y Gribble

Debkumar Bhattacharjee

Alan K Schrock

James A McIntyre

William Aaron Koonce

James J Jakubowski

Rick L Tabor

James G Kennedy

Paulus C J M Van Bellegem

A process for preparing polyurethane films is disclosed, comprising electrodepositing the film onto a substrate from a polyurethane dispersion. One advantage of the electrodeposition process of the present invention is that there is no need for an additional step to remove coagulants from the films, as with conventional coagulation processes. Another advantage is that in using electrodeposition, the amount of water that must be removed during a dewatering step is minimized. A third advantage is that the resulting film demonstrates much greater uniformity in thickness as compare to films prepared by conventional coagulation techniques. The present invention has applicability in, for example, medical applications.

Polyurethane films prepared by electrodeposition from polyurethane dispersions

The present invention is polyurethane dispersion composition that can be mechanically frothed to yield a foam that has good resiliency. Frothed foams of the present invention can be useful in cushioned flooring applications such as attached cushion broadloom, carpet tiles, carpet underlay, or vinyl flooring. Frothed foams of the present invention can also be useful as coatings for various textiles and for diapers.

Polyurethane foams prepared from mechanically frothed polyurethane dispersions

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Wollerau, Switzerland

Michael Y Gribble