Acidic compositions or dermatological composition containing a crosslinked poly (2-acrylamido-2-methylpropanesulfonic acid) neutralized to at least 90%
US6468549B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1997 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Jun 30, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q17/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
The invention relates to a cosmetic or dermatological composition containing an acidic aqueous medium and at least one crosslinked poly(2-acrylamido-2-methylpropanesulfonic acid) polymer neutralized to at least 90%. The composition contains, distributed randomly:(a) from 90 to 99.9% by weight of units of formula (1); and in which X+ denotes a cation or a mixture of cations, it being possible for at most 10 mol % of the cations X+ to be protons H+;(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 proportions by weight being defined with respect to the total weight of the polymer. The invention also relates to the use of this composition in the cosmetic treatment of keratinous substances, in particular of the skin, hair and mucous membranes, and in particular to a non-therapeutic process for depigmentation of the skin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.