C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
400/2005, 403/28
C08G 77/46 (2006.01) C08G 18/00 (2006.01) C08G 65/336 (2006.01) C08J 9/00 (2006.01) C11D 3/37 (2006.01)
Patent
CA 2002340
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.
Blevins Charles Henry
Greene George Homer
Matlock Paul Lumpkin
Murphy Gerald Joseph
Sim & Mcburney
Union Carbide Chemicals And Plastics Company Inc.
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