Moisture holding pigment and a cosmetic containing such a pigment
US5091013A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1989 |
| Grant date | Feb 25, 1992 |
| Priority date | — |
| Expiry date | Aug 3, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/80
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A pigment (or body) composed of particles having surfaces covered with a high molecular substance containing a group of the formula --COOR, where R stands for a hydrogen or metal atom, and having an acid value of at least 200 when the R in the formula stands for a hydrogen atom. It has a high power of absorbing and holding moisture. The surfaces of the pigment particles are alternatively covered with both such a high molecular substance and a substance which makes the surfaces hydrophobic. This pigment has a good affinity for oil and yet a high power of absorbing and holding moisture. A cosmetic containing any such pigment has a high moisturizing power and provides a long makeup life.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.