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US 4,350,605 AGranted
Water-in-oil emulsions
AssigneePeterson/Puritan, Inc.
InventorPaul D. Hughett
Life of this patent
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AssigneePeterson/Puritan, Inc.
InventorPaul D. Hughett
Estimating the term…
Water-in-oil emulsions of improved stability are prepared by using an emulsifying composition comprising the combination of a finely divided montmorillonite mineral sufficiently modified with quaternary ammonium cations containing 10 or more carbon atoms, per cation, to render the mineral compatible with the oil, a polar organic dispersing agent for the mineral, and a partial ester of a fatty acid of 10 to 20 carbon atoms and a saturated, aliphatic, polyhydric alcohol having 3 to 18 hydroxyl groups, at least 2 of said hydroxyl groups being unesterified. In a preferred embodiment, useful, for example, in preparing an emulsion of an aqueous solution of aluminum chlorohydrate in cyclomethicone, the emulsifying composition is the combination of (a) a gelatinous dispersion of stearalkonium hectorite, with propylene carbonate dispersing agent, in isopropyl myristate, and (b) polyglyceryl-4 oleate.
In a water-in-oil emulsion containing water, an oleaginous liquid, and an emulsifying composition, the improvement wherein the emulsifying composition is comprised of the combination of a finely divided montmorillonite mineral sufficiently modified with quaternary ammonium cations containing 10 or more carbon atoms, per cation, to render the mineral compatible with the oleaginous liquid, a polar organic dispersing agent for the mineral, and a partial ester of a fatty acid of 10 to 20 carbon atoms and a saturated, aliphatic, polyhydric alcohol having 3 to 18 hydroxyl groups, at least 2 of said hydroxyl groups being unesterified.
A liquid, self propellant composition comprising, under superatmospheric pressure, (a) a water-in-oil emulsion of water, oleaginous liquid, and an emulsifying composition comprised of the combination of a finely divided montmorillonite mineral sufficiently modified with quaternary ammonium cations containing 10 or more carbon atoms, per cation, to render the mineral compatible with the oleaginous liquid, a polar organic dispersing agent for the mineral, and a partial ester of a fatty acid of 10 to 20 carbon atoms and a saturated, aliphatic, polyhydric alcohol having 3 to 18 hydroxyl groups, at least 2 of said hydroxyl groups being unesterified;
A liquid, self propellant, antiperspirant composition comprising (a) a water-in-oil emulsion of water, cyclomethicone, isopropyl myristate, aluminum chlorohydrate, and an emulsifying composition comprised of the combination of finely divided stearalkonium hectorite, propylene carbonate, and polyglyceryl-4 oleate, and (b) a mixture of isobutane and propane, said composition being under sufficient pressure to cause a portion of the mixture of isobutane and propane to be in the liquid state.
A process of preparing a highly stable emulsion of water in an oleaginous liquid, comprising the steps of (a) heating the water to a temperature in the range of about 120 to 150 degrees F., (b) heating the oleaginous liquid to a temperature in the range of about 120 to 150 degrees F., (c) dissolving in the heated oleaginous liquid (i) a partial ester of a fatty acid of 10 to 20 carbon atoms and a saturated, aliphatic, polyhydric alcohol having 3 to 18 hydroxyl groups, at least 2 of said hydroxyl groups being unesterified, and (ii) a gelatinous dispersion in an organic vehicle of a finely divided montmorillonite mineral sufficiently modified with quaternary ammonium cations containing 10 or more carbon atoms, per cation, to render the mineral compatible with the oleaginous liquid, said dispersion containing a polar organic dispersing agent for the mineral, and (d) adding the heated water to the heated oleaginous solution while agitating the mixture to form a highly stable water-in-oil emulsion.
Dependencies are inferred from the claim text.