Bar Soap Compositions Containing Zinc Pyrithione And A Metal-Pyridine Oxide Complex
AssigneeThe Procter & Gamble Company
InventorsChunpeng JIANG, Brian Joseph LIMBERG, Edward Dewey SMITH, III, Juan WANG, Zhe LIU, Enjun CHENG, Casey Patrick KELLY, Jason Edward COOK, Patrick Christopher STENGER
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Abstract
The present invention relates to a bar soap composition that contains zinc pyrithione (ZPT) and a metal-pyridine oxide complex, preferably a zinc-pyridine oxide complex. The bar soap may be characterized by enhanced discoloration resistance, extended shelf life, and/or increased anti-microbial efficacy.
Claims20
A personal cleansing composition comprising:
- (a) from 0.01% to 5% by weight of zinc pyrithione (ZPT);
- (b) from 0.01% to 10% by weight of particles of a metal-pyridine oxide complex;
- and
- (c) from 20% to 95% by weight of at least one surfactant,
- wherein said personal cleansing composition has a pH value ranging from 9.9 to 10.7 when dispersed in a 1 wt % aqueous solution.
A bar soap comprising from 0.01% to 5% of ZPT, from 0.01% to 10% of particles of a Zn-pyridine oxide complex, and from 20% to 95% of at least one synthetic surfactant by total weight of the bar soap.
A method for forming a bar soap, comprising the steps of:
- (a) forming a mixture that comprises from 0.01% to 5% of ZPT, from 0.01% to 10% of particles of a Zn-pyridine oxide complex, and from 20% to 95% of at least one surfactant by total weight of the mixture;
- and
- (b) shaping the mixture to form a bar soap.
Dependencies are inferred from the claim text.