Title:
高日焼け止め効率油中水型エマルション
Document Type and Number:
Japanese Patent JP2009515898
Kind Code:
A
Abstract:
The present invention relates to highly stable water-in-oil sunscreen emulsions that provide a high sunscreen efficiency (“SE”) having a sun protection factor (“SPF”) of X, where X is at least about 15, and having a sunscreen efficiency (“SE”) of at least 2, preferably at least 3, where SE is the ratio of SPF over the total weight percentage of sunscreen actives based on the total weight of the composition. The emulsions of the present invention provide photoprotection for the period corresponding to the labeled SPF throughout the period of exposure to natural sunlight and comprises (i) at least one sunscreen active and (ii) an alkyl dimethicone copolyol emulsifier in which the water-soluble, alkyl-soluble and silicone-soluble groups of the dimethicone copolyol are in specific ratios to each other. Preferably, the high SE water-in-oil emulsion comprises both a UV-A sunscreen and UV-B sunscreen. More preferably, the combination of sunscreen actives is photostable.
Inventors:
Lot, Dennis, Lee
Kelley, Rwellen
Winner, Glen
Kelley, Rwellen
Winner, Glen
Application Number:
JP2008540270A
Publication Date:
April 16, 2009
Filing Date:
November 13, 2006
Export Citation:
Assignee:
Tanning Research Laboratories, Inc.
International Classes:
A61K8/894; A61K8/06; A61K8/35; A61K8/40; A61Q17/04
Attorney, Agent or Firm:
Yusuke Hiraki
Ishii Teiji
Satoshi Fujita
Ai Fujii
Ishii Teiji
Satoshi Fujita
Ai Fujii