Silicone polyether copolymers and polyurethane foams prepared th

Details Silicone polyether copolymers and polyurethane foams prepared th Silicone polyether copolymers and polyurethane foams prepared th

1990-06-19

1991-09-03

Welsh, Maurice J.

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

Synthetic resins

Cellular products or processes of preparing a cellular...

C08G 1814

Patent

active

050455710

ABSTRACT:
Novel compositions of silicone/polyether block copolymers are provided which are useful as surfactants in several classes of polyurethane foam production. While conventional copolymers have a polysiloxane backbone with pendant polyethers, the surfactants of the present invention are the reverse with siloxane pendants on a polyether chain. These novel non-hydrolyzable polysiloxane polyoxyalkylene copolymers which are characterized by an "inverted" structure, i.e., polyoxyalkylene backbones with lateral and/or terminally pendant polysiloxanes, represent species that are of a narrow molecular weight and compositional distribution and are free of unreacted polyether or non-modified silicone oil diluent. These surfactants are useful in various urethan foam systems and can also display aqueous wetting properties.

REFERENCES:
patent: 3418354 (1968-12-01), Wheeler
patent: 3573334 (1971-03-01), Wheeler
patent: 4242466 (1980-12-01), Schilling
patent: 4797501 (1989-01-01), Myerly et al.

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