Bar composition having enhanced antimicrobial activity
AssigneeConopco, Inc., d/b/a UNILEVER
InventorsPrem CHANDAR, Matthew Fred KUZNITZ, Paul VINSKI, Connor Patrick WALSH
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Abstract
The present invention is directed to a mild bar composition with enhanced antimicrobial activity. The bar composition of the present invention is mild and unexpectedly yields superior antimicrobial activity when used in cleansing applications. The bar composition comprises an anionic surfactant and an acid, and is formulated, when lathered, to generate a wash slurry having a pH from 2.9 to 5.2.
Claims14
A bar composition comprising:
- a) from 18 to 65% by weight anionic surfactant;
- b) from 0.2 to 8% by weight of at least one acid having a pKa from 1 to 8 and a log P from 0 to 4.95;
- c) bar structurant fatty acid, polyalkylene oxide or mixture thereof
- wherein the bar composition in a 10% aqueous slurry has a pH from 2.9 to 5.2, with the proviso that when the slurry has a pH over 4.45 and the bar composition has 0.5% by weight or less of at least one acid having a pKa from 1 to 8 and a log P from 0 to 4.95, the bar composition has less than 3% by weight of total of betaine, sultaine derived surfactant and mixtures thereof, and further wherein the bar composition comprises no more than 3.5% by weight sulfate component based on total weight of the bar composition and the anionic surfactant makes up from 20 to 60% by weight of the composition and comprises a mixture of taurate and isethionate in a weight ratio from 99:1 to 1:99 and the surface is skin.
A method for reducing both Gram negative and positive antimicrobial presence on a surface in need of antimicrobial reduction comprising the steps of:
- a) contacting the surface with a bar slurry comprising:
- i. from 60 to 99% by weight water;
- ii. from 1 to 40% by weight water soluble and insoluble components;
- and
- b) rinsing the slurry from the surface
- wherein soluble and insoluble components make up the total component weight in the slurry that comprises from 20 to 40% by weight soluble components in step a), and further wherein the bar composition has an antimicrobial activity in a 10% slurry that provides a Log10 Reduction against E. coli ATCC 10536 and S. aureus ATCC 6538 of at least 1.0 after 15 seconds of contact, the bar slurry having a pH from 2.9 to 5.2.
Dependencies are inferred from the claim text.