Process of making zirconium-aluminum antiperspirant active

Details Process of making zirconium-aluminum antiperspirant active Process of making zirconium-aluminum antiperspirant active

1999-02-18

2000-10-24

Dodson, Shelley A.

Drug, bio-affecting and body treating compositions

Anti-perspirants or perspiration deodorants

424 66, 424 68, 424400, 424401, 423463, A61K 732, A61K 734, A61K 738, A61K 700

Patent

active

061363022

ABSTRACT:
Disclosed is a process for making zirconium-aluminum salts for use as antiperspirant active, which process comprises the step of anhydrous mixing of a zirconium salt and an aluminum salt to form a zirconium-aluminum salt, wherein the mixture of zirconium and aluminum salts is substantially free of unbound water at all times during the process. The zirconium, aluminum and zirconium-aluminum salts in the process are in the form of particulate or other solids, or can otherwise be dissolved or dispersed in a non-aqueous medium. The process allows for the formation of zirconium-aluminum salts as antiperspirant active without relying upon prior art methods which teach that zirconium-aluminum salts require reaction together in an aqueous medium. This process is more stable than the prior art methods and provides better control over optimizing the polymer size distribution within the resulting zirconium-aluminum salts.

REFERENCES:
patent: 3903258 (1975-09-01), Siegal
patent: 3981986 (1976-09-01), Rubino
patent: 4223010 (1980-09-01), Rubino et al.
patent: 4871525 (1989-10-01), Giovanniello et al.

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