Composition for topical use in the form of a surfactant-free oil-in-water emulsion containing a crosslinked and neutralized poly (2-acrylamido-2-methylpropanesulphonic acid) polymer
US5879718A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 30, 1997 |
| Grant date | Mar 9, 1999 |
| Priority date | — |
| Expiry date | Jun 30, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q19/008
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The present application relates to a cosmetic and/or dermatological composition in the form of a surfactant-free oil-in-water emulsion containing at least one crosslinked poly(2-acrylamido-2-methylpropanesulphonic acid) polymer neutralized to at least 90%. The composition contains, distributed randomly: PA1 (a) from 90 to 99.9% by weight of units of formula (1) below: ##STR1## in which X.sup.+ denotes a cation or a mixture of cations, it being possible for not more than 10 mol % of the cations X.sup.+ to be protons H.sup.+ ; and PA1 (b) from 0.01 to 10% by weight of crosslinking units originating from at least one monomer having at least two olefinic double bonds, the weight proportions being defined relative to the total weight of the polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.