Cationic skin substantive sunscreen composition and method
AssigneeAvon Products, Inc.
InventorsJoseph P. Ciaudelli, Gerhart Karg
Life of this patent
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Abstract
Sunscreening compositions and methods for using the same to protect human skin from erythema producing ultraviolet radiation by applying to the skin a cosmetic carrier composition containing an effective amount to substantially prevent erythema of a cationic para-amino benzoate ester of a substituted amino alkanol. Sunscreening compositions containing cationic para-amino benzoates when applied to the skin have been found to be substantially uneffected by moisture from perspiration or swimming and are, therefore, substantive in form.
Claims7
A method of protecting human skin from erythema producing ultraviolet radiation which comprises applying to said skin a composition of a cosmetic carrier containing from about 1-10 percent by weight based on the total weight of the composition of a cationic aminobenzoate having the general formula:
- ##STR5## wherein Y is a amino radical having the formula ##STR6## such that R.sup.1 and R.sup.2 are each selected from the group consisting of C.sub.1 -C.sub.5 alkyl, aryl, alkaryl, substituted alkyl, substituted aryl, and substituted alkaryl;
- wherein Z is a bivalent alkyl hydrocarbon containing from 1 to 5 carbon atoms;
- wherein X is an anion selected from the group consisting of chloro, bromo, fluoro, iodo, sulfate, bisulfate, carbonate, bicarbonate, sulfite, and bisulfite;
- wherein R.sup.6, R.sup.7, R.sup.8 and R.sup.9 are selected from the group consisting of alkyl, aryl, and alkaryl;
- wherein A is a bivalent C.sub.1 -C.sub.20 hydrocarbon bridging radical and wherein a and b are the integers 1 or 2.
The composition for providing longlasting protection to the human skin from erythema-causing ultraviolet radiation which comprises a cosmetic carrier material containing distributed therein from about 1 percent to about 10 percent based on the total weight of the composition of a cationic aminobenzoate having the general formula:
- ##STR7## wherein Y is a amino radical having the formula of ##STR8## such that R.sup.1 and R.sup.2 are each selected from the group consisting of C.sub.1 -C.sub.5 alkyl, aryl, alkaryl, substituted alkyl, substituted aryl and substituted alkaryl;
- wherein Z is a bivalent alkyl hydrocarbon containing from 1 to 5 carbon atoms;
- wherein X is an anion selected from the group consisting of chloro, bromo, fluoro, iodo, sulfate, bisulfate, carbonate, bicarbonate, sulfite, and bisulfite;
- wherein R.sup.6, R.sup.7, R.sup.8, and R.sup.9 are selected from the group consisting of alkyl, aryl, and alkaryl;
- wherein A is a bivalent C.sub.1 -C.sub.20 alkyl hydrocarbon bridging radical and wherein a and b are integers 1 or 2.
Dependencies are inferred from the claim text.