Cosmetic preparation, surface-hydrophobized silica-coated metal oxide particles, sol of silica-coated metal oxide, and processes for producing these
US6534044B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2001 |
| Grant date | Mar 18, 2003 |
| Priority date | — |
| Expiry date | Jul 11, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/12
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to (1) a cosmetic material comprising silica-coated metal oxide particles further surface-treated with a hydrophobicizing agent, and (2) metal oxide particles having a specified infrared absorption spectrum intensity ratio and refractive index which are further treated with a hydrophobicizing agent, and to a process for their production. The invention further relates to a silica-coated metal oxide sol which gives such particles, and to a process for its production.The invention can give ultraviolet-screening cosmetic materials with an excellent transparent feel, wherein the particles are satisfactorily dispersed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.