Zirconium-aluminum-polyol buffered anti-perspirant complexes
US3981986A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 8, 1974 |
| Grant date | Sep 21, 1976 |
| Priority date | — |
| Expiry date | Jan 8, 1994 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/58
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Water soluble anti-perspirant complexes are provided which comprise a combination of a basic aluminum-polyol compound, a zirconium compound and an organic buffer which may be urea, an amino acid in which the number of amino groups is equal to the number of carboxyl groups in the molecule, an alkaline or hydroxy salt of such amino acid, or mixtures thereof. The various components are present in the complex in amounts such that the Al/Zr mol 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-polyol compounds may be those described in U.S. Pat. Nos. 3,359,169; 3,420,932; 3,405,153 and 3,555,146, particularly basic aluminum chloride-propylene glycol complex. The zirconium compound may be a zirconium oxy (zirconyl) salt and/or zirconium hydroxy salt. Preferred amino acid buffers include glycine and .beta.-alanine and the corresponding salts including the alkaline and alkaline earth glycinates, aluminum dihydroxy or monohydroxy glycinates, and aluminum-magnesium-hydroxy-glycine compounds. The complexes may be used in conventional anti-perspir…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.