Stable ascorbic acid solution with high water content
AssigneeAvon Products, Inc.
InventorsCody N. LEEGWATER, Christopher D. CORINTHIAN, Pradeep H. YADAV
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Abstract
Stable aqueous solutions containing high levels of ascorbic acid and water are described. These compositions have increased ascorbic acid stability due to the creation of solution media containing one or more polyhydric alcohols. The compositions are typically homogenous solutions, and can be adapted to be applied topically to the skin to impart appearance benefits thereto.
Claims20
An aqueous composition comprising an aqueous phase of:
- (a) ascorbic acid;
- and
- (b) one or more polyhydric alcohols;
- (c) more than 10% water by weight of the composition;
- wherein the total number of primary hydroxyl groups in all of said one or more polyhydric alcohols is greater than the total number of secondary and tertiary hydroxyl groups in all of said one or more polyhydric alcohols;
- and
- wherein the weight ratio of ascorbic acid to water is less than 1 and from 1:1 to 1:10;
- and
- wherein the aqueous composition is packaged in a container.
(canceled)
An aqueous composition comprising:
- (a) between 1% and 20% ascorbic acid by weight of the composition;
- (b) between 20% and 50% 1,3-propanediol by weight of the composition;
- and
- (c) between 5% and 30% glycerin by weight of the composition;
- wherein the total weight percentage of components (a)-(c) is less than 100%.
A composition comprising an aqueous phase, wherein said aqueous phase comprises:
- (a) ascorbic acid;
- and
- (b) one or more polyhydric alcohols;
- and
- (c) more than 10% water by weight of the composition;
- wherein the number of primary hydroxyl groups in said one or more polyhydric alcohols is greater than the number of secondary or tertiary hydroxyl groups in said one or more polyhydric alcohols;
- and
- wherein the weight ratio of ascorbic acid to water is less than 1;
- and
- wherein the composition is packaged in a container.
(canceled)
A method of increasing the stability of ascorbic acid in an aqueous solution comprising more than 10% water by weight, the method comprising incorporating one or more polyhydric alcohols into said solution;
- wherein the total number of primary hydroxyl groups in all of said one or more polyhydric alcohols is greater than the total number of secondary and tertiary hydroxyl groups in said one or more polyhydric alcohols.
Dependencies are inferred from the claim text.