Method of making antiperspirant active compositions having SEC chromatogram exhibiting high SEC peak 4 intensity
US8562956B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 2, 2012 |
| Grant date | Oct 22, 2013 |
| Priority date | — |
| Expiry date | Aug 2, 2032 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q15/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A method of making an antiperspirant active composition comprising: heating an aqueous solution containing an aluminum salt having an aluminum to chloride molar ratio of about 0.3:1 to about 3:1, optionally with a buffer agent, at a temperature of about 50° C. to about 95° C. to reflux for a period of time of about 1 hour to about 5 hours to obtain an aluminum salt solution; adding an aqueous solution of an inorganic base to obtain an aluminum salt solution having an OH:Al molar ratio of about 2:1 to about 2.6:1 to obtain a pH adjusted aluminum salt solution having a pH of about 2 to about 5; and optionally adding an aqueous solution containing a zirconium compound to the pH adjusted aluminum salt solution to thereby obtain an aluminum-zirconium salt solution having a molar ratio of aluminum to zirconium of about 5:1 to about 10:1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.