Pigment in thin flakes coated with calcium carbonate and a method for manufacturing the same
US6511536B1 · kind B1 · utility
9Cited by
5References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2000 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Jul 31, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09C2200/505
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Pigments of flake substrate coated with calcium carbonate wherein the surface of the flake substrate is coated with fine particles of calcium carbonate. The pigment may be manufactured by a method where calcium carbonate in fine particles is separated out and coated on the surface of the flaky substrate by the reaction of a calcium salt with a carbonate in a suspension of the flake substrate. It can be used as an extender particularly for cosmetics exhibiting appropriate adhesion to skin, low luster and excellent wrinkle-hiding effect, prevention of unpleasant feel due to perspiration, sebum absorbing property, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.