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US 6,632,444 B1Granted
Stabilization of ferulic acid in cosmetic compositions
AssigneeUnilever Home & Personal Care USA, Division of Conopco, Inc.
InventorsYan Zhou, Alexander Lips, Falguni Snehal Nanavaty, John Brian Bartolone
Life of this patent
Estimating the term…
Abstract
Cosmetic compositions containing ferulic acid at a pH of from 3 to 5, in an aqueous phase, along with a polyol, have improved storage stability and dissolution at body temperature.
Claims5
A cosmetic composition comprising:
- from 10 to 100% of an aqueous phase consisting essentially of from 0.01 to 10% of ferulic acid and from 1 to 90% of a non-volatile polyol, with the weight ratio of polyol to ferulic acid being at least 4:1;
- wherein the pH of the composition is from about 3 to about 5 and the half-lifetime of the composition is at least 20 days at 50° C.;
- and wherein said ferulic acid is in crystalline form at room temperature.
A cosmetic composition comprising:
- from 10 to 100% of an aqueous phase consisting essentially of from 0.5 to 10% of ferulic acid and from 1 to 90% of a non-volatile polyol, with the weight ratio of polyol to ferulic acid being at least 4:1;
- wherein the pH of the composition is from about 3 to about 5 and the half-lifetime of the composition is at least about 1 month at 50° C.
Dependencies are inferred from the claim text.