UV absorbing compositions
US6083490A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | May 6, 1998 |
| Grant date | Jul 4, 2000 |
| Priority date | — |
| Expiry date | May 6, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/80
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A process for producing a liquid dispersion of an inorganic oxide selected from zinc oxide, titanium dioxide and iron oxide, and having a particle size in the range of 0.02 to 30 .mu.m, the process including comminuting the oxide in the presence of the liquid, the liquid being constituted by or including a component having available hydrogen and/or oxygen ions. The liquid is selected from one of an alcohol, ester, hydrogenated ester or polymer containing hydroxyl or hydrogen group(s). The stable dispersion which does not aggregate or agglomerate is suitable for use in topical preparations such as skin care or therapeutic products, cosmetics or hair care products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.