Aluminum-zirconium anti-perspirant systems with complex aluminum buffers
US3979510A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1974 |
| Grant date | Sep 7, 1976 |
| Priority date | — |
| Expiry date | Jun 7, 1994 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/58
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Anti-perspirant complexes are provided which comprise a combination of a basic aluminum compound, a zirconium compound and a complex aluminum buffering compound containing in addition to aluminum two or more of the following: magnesium, calcium, sodium, carbonate, sulfate, hydroxyl and water. The various components are present in the complex in amounts such that the Al/Zr mole ratio is about 10:1 to 1:10 and the pH of an aqueous solution containing 5 to 15 weight percent of the complex (based on the oxides of aluminum and zirconium) is at least about 3. The basic aluminum compound may be any of the usual basic aluminum anti-perspirant salts, particularly the basic aluminum halides, and the zirconium compound may be a zirconium oxy salt and/or zirconium hydroxy salt. The complex aluminum buffer preferably contains among the additional groups or elements magnesium and/or carbonate. Examples of suitable complex aluminum buffers used include well-known antacid complexes such as hydrated magnesium aluminate, hydrated magnesium aluminum sulfate (HMAS), dihydroxy aluminum sodium carbonate (DASC), tetrahydroxy dialuminum magnesium carbonate (TDMC), and co-precipitates or co-dried mixtures …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.