Gel antiperspirant composition containing volatile linear silicone and calcium enhanced antiperspirant salt
View Patent ↗Disclosed are antiperspirant compositions, particularly clear gel antiperspirant compositions, that are water-in-silicone oil emulsions. The emulsion includes a water phase, typically comprising about 65% to about 95% by weight of the emulsion, and a silicone oil phase, typically comprising about 5% to about 35% by weight of the emulsion. The water phase includes an antiperspirant salt dissolved therein, typically in an amount of about 8% to about 30% by weight of the emulsion, the antiperspirant salt comprising a calcium enhanced aluminum-zirconium chlorohydrate. The silicone oil phase contains less than about 5% by weight of the emulsion of a non-volatile oil and includes about 2% to about 25% by weight of the emulsion of a volatile linear silicone.
1. An antiperspirant composition comprising a water-in-silicone oil emulsion that includes a water phase and a silicone oil phase, wherein the water phase includes an antiperspirant salt dissolved therein, said antiperspirant salt comprising a calcium enhanced aluminum-zirconium chlorohydrate, and wherein the silicone oil phase includes, by weight of the emulsion, less than about 5% of a non-volatile oil and about 2% to about 25% of a volatile linear silicone.
2. The antiperspirant composition of claim 1 wherein the water phase comprises about 65% to about 95% by weight of the emulsion and the silicone oil phase comprises about 5% to about 35% by weight of the emulsion, and wherein the water phase includes about 8% to about 30% by weight of the emulsion of the antiperspirant salt dissolved therein.
3. The antiperspirant composition of claim 1 wherein the water phase comprises about 70% to about 90% by weight of the emulsion and the silicone oil phase comprises about 10% to about 30% by weight of the emulsion, and wherein the water phase includes about 10% to about 28% by weight of the emulsion of the antiperspirant salt dissolved therein.
4. The antiperspirant composition of claim 1 or 2 wherein the silicone oil phase includes, by weight of the emulsion, about 0% to about 3% of the non-volatile oil.
5. The antiperspirant composition of claim 4 wherein the silicone oil phase includes, by weight of the emulsion, about 5% to about 15% of the volatile linear silicone.
6. The antiperspirant composition of claim 5 wherein the non-volatile oil is a non-volatile silicone oil.
7. The antiperspirant composition of claim 3 wherein the silicone oil phase includes, by weight of the emulsion, about 0% to about 3% of the non-volatile oil and about 5% to about 15% of the volatile linear silicone.
8. The antiperspirant composition of claim 7 wherein the non-volatile oil is a non-volatile silicone oil.
9. The antiperspirant composition of claim 1 , 2 or 7 wherein the volatile linear silicone comprises at least one silicone having the formula (CH 3 ) 3 SiO{(CH 3 ) 2 SiO} x Si(CH 3 ) 3 , wherein x is 0-7.
10. The antiperspirant composition of claim 1 , 2 or 7 wherein the volatile linear silicone comprises at least one silicone having the formula (CH 3 ) 3 SiO{(CH 3 ) 2 SiO} x Si(CH 3 ) 3 , wherein x is 0-5.
11. The antiperspirant composition of claim 1 , 2 or 7 wherein the volatile linear silicone has a viscosity of about 0.6 to about 3.0 cst (mm 2 /s).
12. The antiperspirant composition of claim 1 , 2 or 7 wherein the volatile linear silicone has a viscosity of about 1.0 to about 2.0 cst (mm 2 /s).
13. The antiperspirant composition of claim 1 wherein the composition has a clarity better than 100 NTU at 21° C.
14. The antiperspirant composition of claim 13 wherein the composition is in the form of a gel.
15. The antiperspirant composition of claim 14 wherein the gel has a viscosity of about 50 Pas to about 200 Pas at 21° C.
16. The antiperspirant composition of claim 1 , 2 or 7 wherein the silicone oil phase comprises a volatile cyclic silicone and a silicone copolyol surfactant.
17. The antiperspirant composition of claim 16 wherein the water phase additionally comprises a lower alkanol and/or a polyhydric alcohol.
18. The composition of claim 17 wherein the lower alkanol is ethanol and the polyhydric alcohol is propylene glycol.