Method of preparation of an antiperspirant salt

Details Method of preparation of an antiperspirant salt Method of preparation of an antiperspirant salt

C - Chemistry, Metallurgy

01

F

C01F 7/48 (2006.01) A61K 8/26 (2006.01) A61Q 15/00 (2006.01) C01F 7/56 (2006.01)

Patent

CA 2410612

A method of providing an antiperspirant active having the empirical formula A12(OH)6-axaYH20, wherein X is C1, Br or I, Y is between 1.5 a 2.5 and a is 0.8 to 1.33, comprising heating an aqueous solution of aluminium halide or HX and aluminium metal for a time period sufficient for the aluminium metal to dissolve, and subsequently ageing the solution of dissolved aluminium for a period of 50 minutes to 21 days at a temperature of 80-130 ~C, such that the Al/X ratio in the resulting solution is between 1.5:1 and 2.0:1, and such that the aluminium concentration in the resulting solution is between 0.5 and 3.8wt%.

Procédé pour préparer une substance active contre la transpiration correspondant à la formule (I) dans laquelle X est Cl, Br ou I, Y est compris entre 1,5 et 2,5 et "a" est compris entre 0,8 et 1,33, qui consiste à chauffer une solution aqueuse d'un halogénure d'aluminium ou HX et de l'aluminium métallique pendant une période suffisante à l'aluminium pour se dissoudre; on fait ensuite vieillir la solution d'aluminium dissous pendant 50 minutes à 21 jours à une température de 80-130 ·C, de façon que le rapport Al/X dans la solution finale soit compris entre 1,5:1 et 2,0:1 et que la concentration d'aluminium dans la solution finale soit comprise entre 0,5 et 3,8 % en poids.

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