Fine dispersion of melanin pigments, its preparation and its use in cosmetics
US5451254A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 1994 |
| Grant date | Sep 19, 1995 |
| Priority date | — |
| Expiry date | Sep 19, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/413
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to a dispersion of melanic pigments containing in a medium selected amongst: a) the straight or branched monoalcohols comprising at least 3 carbon atoms; the straight or branched polyols comprising at least 2 carbon atoms; the saturated or unsaturated cycloaliphatic alcohols comprising at least 6 carbon atoms; the aromatic alcohols comprising at least 6 carbon atoms; the C.sub.8 -C.sub.22 fatty acid esters and C.sub.1 -C.sub.6 alcohol esters or the C.sub.2 -C.sub.6 polyol esters; the C.sub.1 -C.sub.6 aliphatic acid esters or the C.sub.8 -C.sub.22 aromatic acid and fatty alcohol esters; the C.sub.8 -C.sub.22 fatty acid esters and the C.sub.8 -C.sub.22 fatty alcohol esters, the C.sub.6 -C.sub.22 polyacid and alcohol esters, the hydroxylated fatty acid diesters; the straight or branched paraffins comprising at least 8 carbon atoms; the silicone oils; and the mixture of these different organic compounds, or b) an emulsion comprised of a liquid defined under a), non water miscible, water and an emulsifying agent, a melanic pigment in the form of particles in which at least 75% of the particles have a grain size smaller than 10 microns. The invention also relates to…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.