One-phase process for making a clear antiperspirant stick containing dibenzylidene alditol
US5723135A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 6, 1996 |
| Grant date | Mar 3, 1998 |
| Priority date | — |
| Expiry date | Feb 6, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/262
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention features a method of making a gel cosmetic stick. The method comprises first mixing a particulate dibenzylidene alditol with a liquid vehicle which contains an antiperspirant salt dissolved therein to form a uniform dispersion. The dibenzylidene alditol is mixed with the liquid vehicle at a temperature sufficiently low, preferably below 50.degree. C., so that substantially none of the dibenzylidene alditol dissolves in the liquid vehicle. This dispersion may comprise a commercial size quantity, typically greater than 200 kg. A portion of this dispersion, typically a relatively small portion, is then heated to a temperature sufficient to dissolve the dibenzylidene alditol therein, then cooled to form a gel. This heating and cooling is conducted sufficiently rapidly so as to minimize degradation of the dibenzylidene alditol. Preferably the heating and cooling is conducted such that said portion is subjected to a temperature greater than 90.degree. C. for not more than two hours, most preferably not more than thirty minutes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.