Enhanced efficacy antiperspirant compositions containing strontium
View Patent ↗The present invention relates to enhanced efficacy antiperspirant salts containing strontium and an amino acid or a hydroxy acid and particularly to stabilized aqueous solutions of such salts. The present invention also embraces methods of making these antiperspirant salts and solutions and compositions containing same.
1. A composition comprising, in percent by weight, about 5% to about 82% (USP) of an enhanced efficacy aluminum-zirconium-chlorohydrate-glycine antiperspirant salt having an HPLC peak 4 to peak 3 area ratio of at least 0.5 with at least 70% of the aluminum contained in said peaks 3 and 4, wherein the glycine is present in an amount to provide a glycine: Al+Zr weight ratio of about 2:1 to about 1:20, about 1% to about 85% water, and a soluble strontium salt in an amount to provide a Sr:Al+Zr weight ratio of about 1:1 to about 1:28.
2. The composition of claim 1 comprising about 10% to about 78% (USP) of said aluminum-zirconium-chlorohydrate-glycine antiperspirant salt and about 4% to about 75% water, wherein said glycine:Al+Zr weight ratio is about 1:1 to about 1:10 and said Sr:Al+Zr weight ratio is about 1:2 to about 1:25.
3. The composition of claim 2 wherein said aluminum-zirconium-chlorohydrate-glycine antiperspirant salt has an HPLC peak 4 to peak 3 area ratio of at least 0.7 with at least 80% of the aluminum contained in said peaks 3 and 4.
4. The composition of claim 3 wherein said strontium salt is selected from the group consisting of strontium chloride, strontium bromide, strontium nitrate, strontium citrate, strontium formate, strontium acetate, strontium gluconate, strontium ascorbate, strontium lactate, strontium glycinate, strontium carbonate, strontium sulfate, strontium hydroxide, and mixtures thereof.
5. The composition of claim 1 in the form of an aqueous solution comprising about 10% to about 45% (USP) of said aluminum-zirconium-chlorohydrate-glycine antiperspirant salt and about 20% to about 80% water.
6. The composition of claim 4 in the form of an aqueous solution comprising about 20% to about 42% (USP) of said aluminum-zirconium-chlorohydrate-glycine antiperspirant salt and about 25% to about 75% water.
7. The composition of claim 1 in the form of a solid powder comprising about 48% to about 82% (USP) of said aluminum-zirconium-chlorohydrate-glycine antiperspirant salt and about 1% to about 16% water.
8. The composition of claim 4 in the form of a solid powder comprising about 66% to about 78% (USP) of said aluminum-zirconium-chlorohydrate-glycine antiperspirant salt and about 4% to about 13% water.
9. A method of reducing perspiration from human skin comprising applying to human skin a perspiration reducing effective amount of a composition according to claim 1 , 5 , 6 , 7 or 8 .
10. A topical antiperspirant composition in the form of an aerosol, pump spray, roll-on, lotion, cream, gel, or stick comprising a perspiration reducing effective amount of a composition according to claim 1 , 6 , or 8 .
11. A clear antiperspirant gel composition comprising a water-in-oil emulsion wherein the water phase comprises a composition according to claim 5 or 6 .
12. A topical antiperspirant composition comprising a perspiration reducing effect amount of a composition according to claim 7 or 8 suspended in an anhydrous carrier.
13. A topical antiperspirant composition comprising a dermatologically acceptable carrier vehicle, about 8% to about 22% (USP) of an enhanced efficacy aluminum-zirconium-chlorohydrate-glycine antiperspirant salt having an HPLC peak 4 to peak 3 area ratio of at least 0.5 with at least 70% of the aluminum contained in said peaks 3 and 4, wherein the glycine is present in an amount to provide a glycine: Al+Zr weight ratio of about 2:1 to about 1:20, and a soluble strontium salt in an amount to provide a Sr:Al+Zr weight ratio of about 1:1 to about 1:28.
14. The composition of claim 13 wherein the enhanced efficacy aluminum-zirconium-chlorohydrate-glycine antiperspirant salt has an HPLC peak 4 to peak 3 area ratio of at least 0.7 with at least 80% of the aluminum contained in said peaks 3 and 4, wherein the glycine: Al+Zr weight ratio is about 1:1 to about 1:10, and wherein the Sr:Al+Zr weight ratio is about 1:2 to about 1:25.
15. The composition of claim 13 comprising about 0.5% to about 10% strontium salt.
16. The composition of claim 14 comprising about 1% to about 6% strontium salt.
17. The composition of claim 13 or 14 wherein the strontium salt is selected from the group consisting of strontium chloride, strontium bromide, strontium nitrate, strontium citrate, strontium formate, strontium acetate, strontium gluconate, strontium ascorbate, strontium lactate, strontium glycinate, strontium carbonate, strontium sulfate, strontium hydroxide, and mixtures thereof.
18. The composition of claim 13 or 14 wherein the carrier vehicle comprises water and the antiperspirant salt and the strontium salt are dissolved in the water.
19. The compositions of claim 13 or 14 wherein the carrier vehicle is anhydrous and the antiperspirant salt and the strontium salt are suspended in the carrier vehicle.