Surface-treated spherical calcium carbonate particles for cosmetics and method for producing same
US10080713B2 · kind B2 · utility
2Cited by
1References
10Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 16, 2013 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Dec 20, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/62
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention provides surface-treated spherical calcium carbonate particles for use in cosmetics which comprise spherical calcium carbonate particles having a volume mean diameter in a range of 0.5 to 20 μm, and having on their surfaces a hydrous silica coating, and further a silicone oil coating on the hydrous silica coating. The surface-treated spherical calcium carbonate particles for use in cosmetics are obtained by forming a hydrous silica coating on the surfaces of spherical calcium carbonate particles, and then by forming a silicone oil coating on the surfaces of the hydrous silica coating of the particles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.