Mineral sunscreen composition and process for protecting skin from photodamage and aging
AssigneeL'oreal
InventorsTimothy GRAY, Paula Cziryak, Ana Kljuic
Life of this patent
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Abstract
The present invention is directed to a composition and method for protecting a keratinous substrate from harmful UV rays by applying onto the substrate a composition containing: (a) at least one oil phase thickening agent chosen from an activated clay; (b) at least one substantially solid form dispersing aid; (c) at least one non-volatile solvent; (d) at least one inorganic sunscreen active; (e) at least one emulsifier; (f) at least one volatile solvent; and (g) water, and wherein (a) and (b) are present in the composition in a ratio by weight ranging from greater than 1:4 to less than 1:10.
Claims22
A mineral sunscreen composition comprising:
- (a) at least one oil phase thickening agent chosen from an activated clay;
- (b) at least one substantially solid form dispersing aid;
- (c) at least one non-volatile solvent;
- (d) at least one inorganic sunscreen active;
- (e) at least one emulsifier;
- (f) at least one volatile solvent;
- and
- (g) water,
- wherein (a) and (b) are present in the composition in a ratio by weight ranging from greater than 1:4 to less than 1:10.
A mineral sunscreen composition comprising:
- (a) from about 0.1% to about 1.25% by weight of at least one oil phase thickening agent chosen from an activated clay selected from the group consisting of disteardimonium hectorite, stearalkonium hectorite, quaternium-18 bentonite, quaternium-18 hectorite, and benzalkonium bentonite;
- (b) from about 1% to about 5% by weight of at least one substantially solid form dispersing aid comprising talc;
- (c) from about 30% to about 50% by weight of at least one non-volatile solvent;
- (d) from about 5% to about 15% by weight of at least one inorganic sunscreen active;
- (e) from about 1% to about 8% by weight of at least one emulsifier;
- (f) from about 3% to about 10% by weight of at least one volatile solvent;
- and
- (g) remainder by weight water,
- wherein the weights of (a)-(g) are based on the total weight of the composition;
- and
- wherein (a) and (b) are present in the composition in a ratio by weight ranging from greater than 1:4 to less than 1:10.
A method for protecting a keratinous substrate from harmful UV rays by topically applying onto the substrate a mineral sunscreen composition containing:
- (a) at least one oil phase thickening agent chosen from an activated clay;
- (b) at least one substantially solid form dispersing aid;
- (c) at least one non-volatile solvent;
- (d) at least one inorganic sunscreen active;
- (e) at least one emulsifier;
- (f) at least one volatile solvent;
- and
- (g) water,
- wherein (a) and (b) are present in the composition in a ratio by weight ranging from greater than 1:4 to less than 1:10.
Dependencies are inferred from the claim text.