Zinc complexes of basic aluminum bromides and methods of making same
US3947557A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 1975 |
| Grant date | Mar 30, 1976 |
| Priority date | — |
| Expiry date | Jun 3, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/82
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Alcohol soluble complexes of basic aluminum bromides may be prepared by adding zirconyl or zinc bromide or chloride, or zirconyl hydroxychloride or hydroxybromide, or mixtures of the above chlorides and bromides to an aqueous solution of five-sixths basic aluminum bromide, and drying the resulting mixture to a substantially friable solid, such as by vacuum or spray drying. The complexes preferably have an Al/Zn or Al/Zr mol ratio of about 3:1 to 20:1, and the complex solids preferably contain about 15 to 30 weight percent water by Karl Fischer analysis. Such complex solids have a high degree of solubility in anhydrous alcohol and a high compatibility with halogenated hydrocarbons. These properties make the complexes suitable for aerosol formulations and particularly antiperspirant compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.