Cosmetic compositions

Details Cosmetic compositions Cosmetic compositions

A - Human Necessities

61

K

A61K 31/40 (2006.01) A61K 31/19 (2006.01) A61K 31/60 (2006.01) A61K 31/695 (2006.01)

Patent

CA 2168425

A cosmetic composition in the form of an emulsion, gel or lotion comprising an aqueous/alcoholic solution of an acidic anti-acne active and a pyrrolidone-based complexing agent therefor, wherein the aqueous/alcoholic solution has a pH of less than pKa + 1, where pKa is the logarithmic acidity constant for the fully protonated anti-acne active. The cosmetic composition exhibits anti-acne effectiveness and product and colour stability.

Une composition cosmétique se présentant sous la forme d'une émulsion, d'un gel ou d'une lotion comprend une solution à teneur en eau/alcool d'un agent actif acide anti-acnéique et d'un agent complexant à base de pyrrolidone. Cette solution à teneur en eau/alcool a un pH inférieur à pKa + 1, pKa représentant la constante d'acidité logarithmique s'appliquant à l'activité anti-acnéique totalement protonée. La composition cosmétique présente une efficacité anti-acnéique ainsi qu'une bonne stabilité de la couleur et du produit.

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