Surfactants for manufacture of urethane foams

Details Surfactants for manufacture of urethane foams Surfactants for manufacture of urethane foams

1990-12-31

1992-09-08

Welsh, Maurice J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

252351, 528 25, 528 29, 528 31, 556445, C08G 1800

Patent

active

051458799

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.

REFERENCES:
patent: 3779956 (1973-12-01), Morehouse
patent: 3935123 (1976-01-01), Prokai et al.
patent: 4147846 (1979-04-01), Schweiger
patent: 4687786 (1987-08-01), Kollmeier et al.
patent: 4814409 (1989-03-01), Blevins et al.
Article by Murphy et al. in the Journal of Cellular Plastics, Jan./Feb., pp. 56-59 (1982).
Article by Jones and Fesman in the Journal of Cellular Plastics, 1, 3-19 (1965).

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