Cosmetic composition for use in permanent deformation of hair contains as a reducing agent a derivative of N-(mercapto alkyl) succinamic acid or of N-(mercapto alkyl) succinimide
US5154918A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1991 |
| Grant date | Oct 13, 1992 |
| Priority date | — |
| Expiry date | Jul 1, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D211/88
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A cosmetic composition for the first stage of an operation for the permanent deformation of hair contains, as a reducing agent, a compound having the formula ##STR1## wherein, n is 2 or 3; A represents a divalent radical selected from (i) --(CH.sub.2).sub.m --, wherein m is 2 or 3, ##STR2## wherein R.sub.3 and R.sub.4, each independently, represent alkyl having 1-4 carbon atoms, or R.sub.3 and R.sub.4 together with the adjacent carbon atoms form a cyclohexane ring, and ##STR3## wherein R.sub.5 and R.sub.6, each independently, represent hydrogen, alkyl having 1-4 carbon atoms, or R.sub.5 and R.sub.6 together with the adjacent carbon atoms form a benzene ring; R.sub.1 represents hydrogen; R.sub.2 represents hydroxy, or R.sub.1 and R.sub.2 taken together form a simple bond, and the salts of an organic or mineral base of said compound in free acid form.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.