Powder cosmetic and process for production of flaky calcium sulfate dihydrate to be used in the cosmetic
US8496949B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2008 |
| Grant date | Jul 30, 2013 |
| Priority date | — |
| Expiry date | Nov 6, 2029 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2004/20
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention aims at providing a powder cosmetic which does not suffer from the aggregation of powder even when it contains a large amount of oily component and in which no caking of powder on the surface occurs even when pressed, and a process for the production of platy calcium sulfate dihydrate usable for the cosmetic. The process of the production includes a process for producing a powder cosmetic comprising calcium sulfate dihydrate and an oily component, and a process for producing platy calcium sulfate dihydrate which process comprises dissolving a calcium salt in an organic acid and reacting the resulting calcium solution with sulfuric acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.