Microgel and external compositions containing the same
US8367082B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 9, 2008 |
| Grant date | Feb 5, 2013 |
| Priority date | — |
| Expiry date | Jul 24, 2030 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q5/065
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention provides a microgel having a mean particle size of 0.1-1,000 μm, the microgel being produced from a gel which is formed by use of a hydrophilic compound capable of forming a gel. An external composition containing the microgel provides an excellent sensation during use; i.e., the composition provides neither sticky sensation during use nor frictional sensation. Furthermore, even when a large amount of a pharmaceutical ingredient, such as a whitening ingredient, or a salt is incorporated into the composition, the viscosity of the composition is not lowered, and the composition exhibits excellent viscosity increasing property. In addition, the composition exhibits long-term stability, without inviting separation of water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.