Organosilicon-treated pigment, process for production thereof, and cosmetic made therewith
US5368639A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1992 |
| Grant date | Nov 29, 1994 |
| Priority date | — |
| Expiry date | Jun 25, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/80
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Disclosed herein are (1) an organosilicon-treated pigment which comprises a pigment or extender pigment and a linear reactive alkylpolysiloxane having in the molecule amino groups, imino groups, halogen atoms, hydroxyl groups, or alkoxyl groups, which is adhered in an oriented mode to the surface of the pigment or extender pigment by heat treatment, (2) a process for producing said treated pigment, and (3) a cosmetic made with said treated pigment. The organosilicon-treated pigment is characterized by silicone firmly adhered to the surface of a pigment or extender pigment, freedom from residual hydrogen, very smooth feel, good adhesion to the skin, and ability to permit the color pigment of fine particle size to spread well. The treated pigment finds use as a component of high-quality cosmetics such as powder foundation, liquid foundation, rouge, and eye shadow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.