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US 4,859,446 AGranted
Process for preparing basic aluminum compounds having increased sweat resistant activity
AssigneeWickhen Products, Inc.
InventorsEric S. Abrutyn, Robert J. Sloan
Life of this patent
Estimating the term…
Abstract
An improved process for preparing an enhanced antiperspirant active polymeric aluminum compound having the empirical formula: Al.sub.2 (OH).sub.6-a X.sub.a (I) wherein X is Cl, Br, F, I, SO.sub.4 and NO.sub.2, a is about 1.0 to about 4, which is further characterized by (a) a Size Exclusion Chromatograph, (b) a Band III percent aluminum value of at least 40 percent, and preferably (c) a Band I percent aluminum value of not greater than 5 percent, and compositions thereof.
Claims10
An improved process for preparing an enhanced antiperspirant active aluminum compound having the empirical formula:
- Al.sub.2 (OH).sub.6-a X.sub.a (I)
- wherein X is Cl, Br, F, I, SO.sub.4 and NO.sub.2, a is about 1.0 to about 4.0, which is further characterized by (a) a Size Exclusion Chromatograph Test Band corresponding to Band III of the Standard Basic Aluminum Chloride Solution Size Exclusion Chromatograph, and (b) a Band III percent aluminum value of at least 40 percent, which comprises reacting an aluminum compound of the formula:
- Al.sub.n X.sub.m, wherein X is an hereinbefore described, n is 1 or 2, and m is 1 or 3, with aluminum metal in an aqueous medium at a temperature between 50.degree. C. and 195.degree. C. until a ratio of aluminum to anion of 0.50-2.5:1 is obtained, and then recovering the resultant product without elevated temperature aging.
Dependencies are inferred from the claim text.