Foamable composition containing unsaturated perfluorochemical blowing agent
AssigneeMinnesota Mining and Manufacturing Company
InventorsRudolf J. Dams, Richard M. Flynn, Koen Focquet, John G. Owens
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Abstract
Foamable compositions comprise (a) at least one normally liquid, unsaturated perfluorochemical blowing agent compound selected from the group consisting of perfluoroolefin compounds, e.g., perfluoro(4-methylpent-2-ene), perfluoroaromatic compounds, e.g., hexafluorobenzene, and perfluorocycloolefin compounds, e.g., perfluorocyclohexene, the perfluoroolefin compounds optionally containing one or more catenary heteroatoms; and (b) at least one foamable polymer or the precursors of at least one foamable polymer. The compositions are useful in preparing polymeric, e.g., polyurethane, foams.
Claims20
A foamable composition comprising (a) at least one normally liquid, unsaturated perfluorochemical blowing agent compound which has a boiling point greater than or equal to about 20.degree. C. and which is selected from the group consisting of perfluoroolefin compounds and perfluoroolefin compounds which contain at least one catenary heteroatom;
- and (b) at least one foamable polymer or the precursors of at least one foamable polymer.
A process for preparing polymeric foam comprising the step of vaporizing a blowing agent consisting of at least one normally liquid, unsaturated perfluorochemical blowing agent compound in the presence of at least one foamable polymer or the precursors of at least one foamable polymer, said blowing agent compound being selected from the group consisting of perfluoroolefin compounds and perfluoroolefin compounds which contain at least one catenary heteroatom.
A foamable composition comprising (a) at least one normally liquid, unsaturated perfluorochemical blowing agent compound selected from the group consisting of perfluoroolefin compounds and;
- (b) at least one organic polyisocyanate;
- and (c) at least one polyol.
Dependencies are inferred from the claim text.