Gelled ultrafine oil-in-water emulsion stabilized with a crosslinked poly(2-acrylamido-2-methylpropanesulfonic acid) polymer neutralized to at least 90% process of preparation and applications
US5952395A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Jun 30, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q17/04
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present invention relates to cosmetic or dermatological compositions in the form of an ultrafine oil-in-water emulsion wherein the mean size of the particles or globules which form the fatty phase ranges from 50 nm to 1000 nm, and wherein the composition also contains at least one crosslinked poly(2-acrylamido-2-methylpropanesulphonic acid) polymer neutralized to at least 90%. These compositions may be obtained according to an emulsifying technique using phase inversion. These compositions are stable in all viscosity ranges with a large variety of possible emulsifiers and whatever oils are employed. They can contain a large variety of cosmetic active substances and adjuvants without disturbing their stability and they can be employed in many cosmetic and dermatological applications and adapted to all types of skin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.