Union Carbide Chemicals and Plastics Company, Inc.

Union Carbide Corporation

Union Carbide Chemicals & Plastics Technology Corporation

Plastics Technology Corporation

Union Carbide Chemicals

Charles H Blevins

Gerald J Murphy

Herbert E Petty

George N Foster

Roswell E King, Iii

George H Greene

Paul L Matlock

William B Herdle

James D Reedy

David D Farris

Paul E Austin

Philbert E Ramdatt

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.

Silicone polyether copolymers and polyurethane foams prepared therefrom

The present invention relates to olefin polymer compositions which can be extruded into film material characterized by improved stability and optical properties. In particular, this application is directed olefin polymer compositions containing specific polyorganosiloxanes bearing a hydroxyl functionality.

Olefin polymer compositions containing polyorganosiloxanes and the use

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 urethane foam systems and can also display aqueous wetting properties.

The present invention relates to olefin polymers stabilized with polydialkylsiloxanes containing pendant sterically hindered phenol moieties. The compounds are represented by the general formula MD.sub.x D*.sub.y M.sub.A 2 wherein M=R'R.sub.2 SiO.sub.1/2 ##STR1##

Polymer compositions stabilized with polydialkylsiloxanes containing

The present invention relates to polysiloxanes containing pendant sterically hindered phenol moieties. The compounds are represented by the general formula MD.sub.X D'.sub.y M.

Polysiloxanes with pendant sterically hindered phenol moiety connected

An improved process is provided for the preparation of siloxane-oxyalkylene block copolymer surfactant compositions which utilized a hydrosilation reaction with high boiling point polar polyols as the reaction solvent. The reaction solvent need not be removed from the block copolymer, particularly when the block copolymer is used as a surfactant for polyurethane foam formulations. Dipropylene glycol is the preferred polar solvent and when used in the preparation of the surfactants need not be removed when the surfactants are employed in the preparation of urethane foams.

Process for the preparation of organopolysiloxane surfactants

A polysiloxane-polyoxyalkylene composition of the nominal formula: ##STR1## wherein R is an alkyl group having 1 to 3 carbon atoms and R.degree., R', R' and R'' are individually monovalent polyoxyalkylene polyethers attached to the silicon atom through a difunctional link; and,

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Beacon, NY, United States of America

Charles H Blevins