Method of inhibiting perspiration with basic aluminum and aluminum/zirconium antiperspirants
US5908616A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 1998 |
| Grant date | Jun 1, 1999 |
| Priority date | — |
| Expiry date | Feb 16, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/61
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Basic aluminum halides and nitrates having enhanced antiperspirant efficacy are produced by reacting (a) aluminum powder, (b) an aluminum halide or nitrate solution and (c) water at a temperature greater than about 85.degree. C. This reaction is maintained until reaction products having an Al:anion ratio of about 1.2 to 1.8 and a solution solids concentration of about 30-40 wt. % on an anhydrous basis are obtained. The products are characterized as having a Size Exclusion Chromatography Test Band having a relative retention time corresponding to Band II of a Standard Basic Aluminum Chloride Size Exclusion Chromatogram and a Band II percent aluminum value of at least about 50% and a Band III percent aluminum value of less than 20%.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.