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US 8,912,172 B2Granted
Skin external preparation containing triterpenic acid
AssigneesKuraray Co., Ltd., Pola Chemical Industries Inc.
InventorsHisashi Akamatsu, Masashi Suzuki, Yuji Sakai
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Abstract
Disclosed is a skin external preparation containing a triterpenic acid typified by ursolic acid. For obtaining a skin external preparation having excellent storage stability by improving the dissolution stability of the triterpenic acid and the like, 4-alkylresorcinol such as 4-n-butylresorcinol is added into a skin external preparation containing a triterpenic acid and the like such as benzyl ursolate.
Claims16
A skin external preparation, comprising:
- component (1) 1.0 wt % or less of a triterpenic acid and/or an ester, amide, ether or salt derivative thereof, provided that the content of the triterpenic acid and/or the derivative thereof is not 0;
- and
- component (2) 0.1 to 0.5 wt % of a 4-alkylresorcinol and/or a salt thereof.
Dependencies are inferred from the claim text.