DETAILED DESCRIPTION OF THE INVENTION The antiperspirant composition of the present invention is in the form of an aqueous alcoholic liquid solution.
The composition will generally comprise, by weight, about 10% to about 60%, preferably about 15% to about 55%, more preferably about 18% to about 50%, ethanol.
The composition will also include about 8% to about 22% (USP), preferably about 15% to about 20% (USP), antiperspirant salt dissolved in the composition.
The antiperspirant salt comprises a calcium enhanced aluminum-zirconium chlorohydrate.
The amount of water in the composition will vary depending upon the other components in the composition and the amount of such components.
Typically the composition will include about 10% to about 80% water, more typically about 25% to about 70%, most typically about 30% to about 60%.
The composition may optionally include a thickening agent to increase the viscosity of the solution, as well as various other components, such as fragrance, to improve its aesthetic properties.
The antiperspirant salts that may be utilized in the compositions of the present invention are calcium enhanced aluminum-zirconium chlorohydrate (CEAZCH) salts.
By this term is meant antiperspirant salts as described in U.
S.
Pat.
No.
6,245,325, which is incorporated herein by reference.
These salts are aluminum-zirconium chlorohydrates (Al:Zr=2-10; M:Cl=0.
9-2.
1) that, as 10% solutions, have an HPLC peak 4 to peak 3 area ratio of at least 0.
5, preferably at least 0.
7, more preferably at least 0.
9, with at least 70%, preferably at least 80%, of the aluminum contained in said peaks 3 and 4.
These salts include a soluble calcium salt in an amount to provide a Ca:Al+Zr weight ratio of about 1:1 to about 1:28, preferably about 1:2 to about 1:25.
They also include a water soluble amino and/or hydroxy acid in an amount to provide an acid:Al+Zr weight ratio of about 2:1 to about 1:20, preferably about 1:1 to about 1:10.
Typical calcium salts include calcium chloride, calcium bromide, calcium nitrate, calcium citrate, calcium formate, calcium acetate, calcium gluconate, calcium ascorbate, calcium lactate, calcium glycinate and mixtures thereof
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