Enhanced efficacy aluminum chlorhydrate antiperspirant and method of making same
US5234677A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1990 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Jul 2, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2002/87
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Two-thirds to five-sixths basic aluminum chlorides having enhanced antiperspirant efficacy are produced by heating an aqueous solution containing about 40 to about 50 weight percent of the basic aluminum chloride to a temperature of at least about 130 degrees C. for about one to twelve hours in a closed vessel, with the heating time being inversely proportional to the temperature. Five-sixths basic aluminum chlorides treated in this manner are characterized by a size exclusion chromatogram having a single major peak with its apex at a relative retention time of about 0.75-0.79. The basic aluminum chlorides may be incorporated into any of the conventional antiperspirant forms with non-toxic, dermatologically acceptable carriers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.