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US 8,263,538 B2Granted
Personal wash cleanser with mild surfactant systems comprising defined alkanoyl compounds and defined fatty acyl isethionate surfactant product
AssigneeConopco, Inc.
InventorsLiang Sheng Tsaur, Kavssery P. Ananthapadmanabhan
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Abstract
The present invention relates to super mild surfactant systems. Specifically, a combination of specific alkanoyls or mixtures of alkanoyl surfactants with specifically identified fatty acyl isethionate product provide synergy which reduces irritation (as measured by Patch Testing) so greatly that it is comparable to mildness which normally can be only achieved using very high amounts of benefit agent (e.g., emollient).
Claims7
A liquid cleansing composition comprising:
- (1) 1 to 30% by wt. of a surfactant system comprising:
- (a) 30 to 70% by wt of surfactant system of a mixture of alkanoyl glycinate and alkanoyl sarcosinate wherein the ratio of said alkanoyl glycinate to alkanoyl sarcosinate is of from 1/0 to 1/3 and the alkyl group on the alkanoyl chain is C8 to C20;
- (b) 10 to 60% by weight of surfactant system of a fatty acyl isethionate product which product comprises 40 to 80% fatty acyl isethionate and 15 to 50% free fatty acid and/or fatty acid salt, and
- (c) 20 to 80% by weight of surfactant system of amphoteric and/or zwitterionic surfactant;
- wherein greater than 25% and less than 45% of the fatty acyl isethionate is of chain length C16 or greater;
- and greater than 50% of chain length of free fatty acid and fatty acid salt groups combined are of chain length C16 to C20
- wherein the composition comprises 3% or less of an alkyl sulfate anionic surfactant;
- and
- wherein total irritation score using Patch Test Methodology is less than 75% relative to a 0.5% solution of sodium dodecyl sulfate used as control in the same Patch Test.
6 more elements
Dependencies are inferred from the claim text.