C - Chemistry – Metallurgy – 01 – F
Patent
C - Chemistry, Metallurgy
01
F
23/134, 23/201,
C01F 7/02 (2006.01) A61K 8/19 (2006.01) A61K 8/26 (2006.01) A61K 8/28 (2006.01) A61K 8/29 (2006.01) A61K 8/44 (2006.01) A61Q 15/00 (2006.01) C01B 11/14 (2006.01) C01B 11/18 (2006.01) C01B 11/22 (2006.01) C01F 7/48 (2006.01) C01F 7/66 (2006.01)
Patent
CA 1340188
Disclosed is a basic aluminum material having enhanced antiperspirant activity, the material having the empirical formula Al2(OH)6-a X a, where 0.5 ~ a ~ 5.0, and X is a univalent complex oxoanion of nitrogen, chlorine and other halogens, which does not form strong coordination compounds with Al3+ so that non-hydrolyzed aqueous monomeric aluminum solutions containing the anion are essentially completely dissociated, and which are readily soluble in water with metallic ions in the solution; and wherein the material is characterized by: (a) size exclusion high performance liquid chromatography peaks corresponding to peak 3 and peak 4 of size exclusion chromatograms formed by HPLC technique; (b) a peak 4 relative area of at least 40%, a peak 3 relative area of less than 50%, the sum of the relative peak 3 and peak 4 areas being at least 50%; and (c) less than 10% chromatographic peaks eluting at shorter retention times than peak 3, corresponding to peaks 1 and 2. Illustratively, the univalent oxoanion can be ClO3-, CLO4-, IO4-, and preferably NO3-. The material is characterized by having at least 25% by weight thereof in the form of Al b polyhydroxyaquoaluminum species. Also disclosed are antiperspirant compositions including the basic aluminum material, a zirconium, hafnium, titanium and/or tin antiperspirant active material and a neutral amino acid, and methods of forming the basic aluminum material and the antiperspirant composition. The basic aluminum material can be formed at relatively low temperatures, without first forming a dilute solution of a basic aluminum compound, and the basic aluminum material has a stable enhanced activity in aqueous solution over a relatively long period of time.
608319
Barr Morton Lawrence
Vincenti Paul Joseph
Fetherstonhaugh & Co.
The Mennen Company
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