FOAMABLE COMPOSITION CONTAINING UNSATURATED PERFLUOROCHEMICAL BLOWING AGENT

摘要

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; (b) a precursor of a foamable polymer comprising at least one organic polyisocyanate modified with at least one substantially fluorinated isocyanate-reactive compound; and (c) at least one compound containing at least two reactive hydrogen atoms. The compositions are useful in preparing polymeric, e.g., polyurethane, foams.