Cholesterol ester clathrate, water-holding composition, hydrous compositions, cosmetics containing the same, and process for the preparation thereof
US6309653A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1999 |
| Grant date | Oct 30, 2001 |
| Priority date | — |
| Expiry date | Jan 11, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q1/06
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A cholesterol ester clathrate comprising a cholesterol ester included in a hydroxyalkylated cyclodextrin; a hydrous composition comprising a hydroxyalkylated cyclodextrin, a cholesterol ester and water; a hydrous composition comprising a hydroxyalkylated cyclodextrin, a cholesterol ester, a hydrous stabilizer, and water; a hydrous composition comprising a hydroxyalkylated cyclodextrin, a cholesterol ester, a clay mineral, and water; cosmetics containing these hydrous compositions; and process for the preparation thereof. The clathrate exhibits an emulsifying effect in itself. Further, the hydrous compositions are excellent in water-holding capacity and are improved in hydration properties and separation stability at a high temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.