Charles R Blevins

US Patent:

51458799, Sep 8, 1992

Filed:

Dec 31, 1990

Appl. No.:

7/636638

Inventors:

Richard A. Budnik - Mount Kisco NY
Charles H. Blevins - San Jose CA
Gerald J. Murphy - Wappingers Falls NY
Wojciech Grabowski - Versoix, CH
Raymond L. Cobb - Buda TX

Assignee:

Union Carbide Chemicals & Plastics Technology Corporation - Danbury CT

International Classification:

C08G 1800

US Classification:

521112

Abstract:

Silicone surfactants having a siloxane backbone and a mixture of high and low atomic mass oxyalkylene pendant groups, these polyether pendants having average atomic masses of 1500-6000 and 300-750 respectively. The surfactants of the invention operate in polyurethane foam compositions to provide stable foams over a range of surfactant concentrations while still producing product foams having relatively constant breathability. Also disclosed and claimed are polyurethane foam compositions which include the surfactants, a method of making polyurethane foam using the surfactants, and polyurethane foam made by the method.