Composition based on lipid vesicles and a cross-linked poly(2-acrylamido-2-methylpropane-sulphonic acid) which is at least 90% neutralized
US6123960A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1998 |
| Grant date | Sep 26, 2000 |
| Priority date | — |
| Expiry date | Jul 7, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2984
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A cosmetic and/or dermatological composition comprising an aqueous dispersion of lipid vesicles containing at least one cross-linked poly(2-acrylamido-2-methylpropanesulphonic acid) polymer which is at least 90% neutralized, comprising, distributed in a random manner: PA1 a) from 90 to 99.9% by weight of units of formula (1): ##STR1## in which X.sup.+ denotes at least one cation wherein no more than 10 mol % of the cations X.sup.+ are protons H.sup.+ ; PA1 b) from 0.01 to 10% by weight of cross-linking units obtained from at least one monomer having at least two olefinic double bonds; PA1 wherein the percentages by weight are relative to the total weight of the polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.