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US 10,370,622 B2Granted
Soap bar having enhanced antibacterial activity
AssigneeConopco, Inc.
InventorsPrem Chandar, Guohui Wu, Nitish Kumar, Vamsi Krishna Manthena, Kalpana Kamalakar Nayak, Vibhav Ramrao Sanzgiri, Anat Shiloach
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Abstract
A soap bar comprising: (a) 25 to 85% by weight, based on the total weight of the bar, of fatty acid soap; (b) 0.1 to 100 ppm by weight, based on the total weight of the bar, of at least one silver (I) compound having a selected silver ion solubility, wherein at 25° C., a 1 wt % solution of the bar in water has a pH of from 9 to 11.
Claims19
A soap bar comprising:
- (a) 25 to 85% by weight, based on the total weight of the bar, of fatty acid soap;
- (b) 0.1 to 100 ppm by weight, based on the total weight of the bar, of at least one silver (I) compound having a silver ion solubility in water at 25° C. of at least 1×10−4 mol/L,
- wherein at 25° C., a 1 wt % solution of the bar in water has a pH in a range of from 9 to 11.
A method of reducing Gram positive bacteria on human skin, which comprises;
- (i) lathering a high pH solid soap composition to form an aqueous soap dilution containing the high pH solid soap composition at a level of from 1 to 25% by weight, based on the total weight of the dilution,
- wherein the high pH solid soap composition comprises:
- (a) 25 to 85% by weight, based on the total weight of the high pH solid soap composition, of fatty acid soap;
- and
- (b) 0.1 to 100 ppm by weight, based on the total weight of the high pH solid soap composition, of at least one silver(I) compound having a silver ion solubility in water at 25° C. of at least 1×104 mol/L,
- wherein a 1% solution of said high pH solid soap composition has a pH of from 9 to 11;
- (ii) applying the aqueous soap dilution to the skin for a contact time of less than 1 minute;
- and
- (iii) rinsing the aqueous soap dilution from the skin;
- wherein the method provides a log10 reduction in biocidal activity against Gram positive bacteria.
7 more elements
A soap bar comprising:
- (a) 25 to 85% by weight, based on the total weight of the bar, of fatty acid soap;
- (b) 0.1 to 100 ppm by weight, based on the total weight of the bar, of at least one silver (I) compound having a silver ion solubility in water at 25° C. of at least 1×10′ mol/L,
- wherein:
- a 1 wt % solution of the bar in water at 25° C. has a pH in a range of from 9 to 11;
- and
- the silver (I) compound is selected from the group consisting of silver oxide, silver nitrate, silver acetate, silver sulfate, silver carbonate, silver citrate and silver phosphate.
3 more elements
Dependencies are inferred from the claim text.