Build a solid foundation in science, formulation and product development—find out more!
Most Popular in:
Patent Picks—Reactivating Sunscreens; Etched UV Protection; Jaboticaba/Cashew Skin Care; Water-soluble Sunscreens
By: Rachel L. Grabenhofer, Cosmetics & Toiletries
Posted: September 4, 2013
Patent Picks are taken from publicly available sources and cover recent patents issued or applied for in the cosmetic and personal care industries and relevant peripheral markets. This edition features sun protection and skin repair technologies.
Sunscreen composite particles for UVA and UVB protection
U.S. Patent 8524203
Publication date: Sept. 3, 2013
Assignee: Conopco Inc.
According to this patent, dibenzoylmethane derivatives are known sunscreens capable of absorbing UVA rays but they are relatively sensitive to UV rays. Moreover, dibenzoylmethane derivatives are essentially ineffective against UVB and often require formulation with other UVB sunscreens like p-methoxycinnamic acid; however, such UVB sunscreens also tend to accelerate the decomposition of dibenzoylmethane derivatives. Thus, compositions containing both dibenzoylmethane derivatives and p-methoxycinnamic acid must frequently be applied by consumers to ensure adequate protection.
The present invention describes particles comprising: a) a UVA sunscreen suitable to undergo keto-enol tautomerization; b) a resin; and c) a solvent in which the UVA sunscreen is soluble and has a dielectric constant from about 5.5 to about 9. Said particles are unexpectedly suitable to provide both improved UVA protection and UVB protection and are substantially free of supplied UVB sunscreen.
Azobenzene compounds for reactivating sunscreens
WIPO Patent Application WO/2013/123658
Publication date: Aug. 29, 2013
Assignee: Empire Technology Development LLC and J Wang