Invention Grant
US08128913B1 Sunscreen composition with enhanced UV-A absorber stability and methods
有权
具有增强的UV-A吸收剂稳定性和方法的防晒组合物
- Patent Title: Sunscreen composition with enhanced UV-A absorber stability and methods
- Patent Title (中): 具有增强的UV-A吸收剂稳定性和方法的防晒组合物
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Application No.: US12316121Application Date: 2008-12-08
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Publication No.: US08128913B1Publication Date: 2012-03-06
- Inventor: James A. Roszell , Jie Zhang
- Applicant: James A. Roszell , Jie Zhang
- Applicant Address: US NV Las Vegas
- Assignee: Skinvisible Pharmaceuticals, Inc.
- Current Assignee: Skinvisible Pharmaceuticals, Inc.
- Current Assignee Address: US NV Las Vegas
- Agency: Merchant & Gould, P.C.
- Main IPC: A61K8/00
- IPC: A61K8/00 ; A61K8/18 ; A61Q17/04

Abstract:
A sunscreen composition is provided according to the present invention. The sunscreen composition includes a skin bonding polymer composition comprising a hydrophobic polymer/hydrophilic polymer adduct, at least one sunscreen active agent comprising a UV-A absorber, and water in an amount of affected to provide a the composition with the texture suitable for application to skin. The hydrophobic polymer/hydrophilic polymer adduct comprises: (i) hydrophobic polymer composition comprising a mixture of a lower poly(vinylpyrrolidone/alkylene) polymer wherein the alkylene group contains about 10 to about 24 carbon atoms and a higher poly(vinylpyrrolidone/alkylene) polymer wherein the alkylene group contains greater than about 24 carbon atoms; and (ii) hydrophilic polymer composition comprising carboxylic acid groups, hydroxyl groups, or both carboxylic acid groups and hydroxyl groups.
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