Fine-celled plastic foam containing fluorochemical blowing agent
AssigneeMinnesota Mining and Manufacturing Company
InventorsRudolf J. Dams, Richard M. Flynn, Koen Focquet, John G. Owens
Life of this patent
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Abstract
A blowing agent emulsion comprising a blowing agent mixture, such that the mixture comprises (1) one or more low boiling, hydrochlorofluorocarbon, and/or one or more low boiling, hydrofluorocarbon and (2) one or more low boiling chlorine-free perfluorinated compound; a foamable polymerizable reaction mixture, and a fluorochemical surfactant, optionally, a silicone surfactant, and a catalyst; a foamed plastic; and a process for making thereof.
Claims28
A blowing agent emulsion comprising:
- (a) at least one high molecular weight compound with at least two reactive hydrogen atoms,
- (b) blowing agent mixture, wherein said mixture comprises
- (1) one or more low boiling, hydrochlorofluorocarbon, and/or one or more low boiling, hydrofluorocarbon, and
- (2) one or more low boiling, chlorine-free perfluorinated compound, and
- (c) fluorochemical surfactant.
A process for preparing a foamed plastic comprising the steps:
- (a) admixing an organic and/or modified organic polyisocyanate and at least one high molecular weight compound with at least two reactive hydrogen atoms, in the presence of
- (1) blowing agent mixture, wherein said mixture comprises
- (i) one or more low boiling, hydrochlorofluorocarbon and/or one or more low boiling, hydroflurocarbon, and
- (ii) one or more low boiling, chlorine-free perfluorinated compound,
- (2) a catalyst, and
- (3) a fluorochemical surfactant.
A blowing agent emulsion for preparing polyurethane foams comprising:
- (a) at least one high molecular weight compound with at least two reactive hydrogen atoms,
- (b) blowing agent mixture, wherein said mixture comprises
- (1) one or more lowing boiling, hydrochlorofluorocarbon, and/or one or more low boiling, hydrofluorocarbon, and
- (2) one or more low boiling, chlorine-free perfluorinated compound, and
- (c) fluorochemical surfactant.
Dependencies are inferred from the claim text.