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US 12,343,417 B2Granted
Antiperspirant compositions
AssigneeConopco, Inc.
InventorsSimeon Dobrev Stoyanov, Philip Christopher Waterfield, Aneliya Nikolova Zdravkova
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Abstract
An oil-in-water emulsion comprising a liquid C10-C22 fatty acid, an emulsifier and a water-soluble metal salt capable of forming a water-insoluble salt with the C10-C22 fatty acid at a pH of greater than 6 and thereby giving an antiperspirancy benefit on topical application to the skin.
Claims18
An oil-in-water emulsion comprising:
- (i) a C10-C22 fatty acid that is a liquid at one atmosphere pressure and 25° C.;
- (ii) an emulsifier for the C10-C22 fatty acid;
- and
- (iii) a water-soluble metal salt that forms a water-insoluble salt with the C10-C22 fatty acid at a pH of greater than 6;
- wherein the oil-in-water emulsion does not comprise aluminum salts or zirconium salts;
- wherein the water-soluble metal salt is divalent;
- wherein a molar ratio of the C10-C22 fatty acid to a cation of the water-soluble metal salt divided by a cation of the water-soluble metal salt's valence is from 1:2 to 2:1;
- and further wherein the oil-in-water emulsion increases by at least 1 pH unit after application to a skin surface, which results in gelation of the oil-in-water emulsion comprising the water-soluble metal salt and the C10-C22 fatty acid.
5 more elements
Dependencies are inferred from the claim text.