Patents

Sunscreen Contains Trans-resveratrol Polysaccharide

US Patent No. 11,458,079 B2 has two components.

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By: Christine Esposito

Editor-in-Chief

US Patent No. 11,458,079 B2 (Hiroki Hamada, Ryuta Yuasa,  Yui Matsuhashi, Daisuke Uesugi); Jo Cosmetics Co. Ltd. Tokyo, and  Meisterbio Co. Ltd. Okayama have been awarded a US patent for an emulsified cosmetic composition for use in sunscreen. It is comprised of the following components:

A:  Trans-resveratrol polysaccharide, wherein the trans-resveratrol polysaccharide comprises a compound represented by this formula:



US Patent No. 11,458,079 B2

wherein n is an integer of 1 to 9,
wherein all (1-4) glycosidic linkages in the formula are α-linkages, and
wherein an O-glycosidic linkage at position 3 of resveratrol in the formula is a β-linkage; and

B:  A UV protection agent, wherein the UV protection agent is a UV scattering agent, wherein the UV scattering agent is selected from the group consisting of fine particle titanium oxide, fine particle zinc oxide, and combinations thereof; wherein the UV scattering agent has a hydrophobized surface and wherein the UV scattering agent has a number average particle size of from 10 nm to 35mn.

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