Polyaspartic acid derivatives, their preparation and their use in cosmetic composition
US4363797A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 1979 |
| Grant date | Dec 14, 1982 |
| Priority date | — |
| Expiry date | Dec 6, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/1092
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Novel polymers useful, in particular, in cosmetic compositions for application to the hair are described. These random polymers can be represented by the general formula: ##STR1## in which: Z represents a mercapto radical or a sulphonic acid radical, which is free or is in the form of an alkali metal or an alkaline earth metal salt, PA0 x is an integer from 2 to 6, PA0 R represents a hydrogen atom or a lower alkyl radical, PA0 each R' independently represents a hydrogen atom, a lower hydroxyalkyl group, an alkyl group having 1 to 18 carbon atoms or an alkenyl group having at most 18 carbon atoms, PA0 each R" independently represents a hydrogen atom, a lower hydroxyalkyl group or a lower alkyl group, or PA0 R' and R", together with the nitrogen atom to which they are attached, form a 6-membered ring, which can contain, apart from the said nitrogen atom, an oxygen or nitrogen atom, PA0 M represents a hydrogen atom, an alkali metal atom or half an atom of an alkaline earth metal, PA0 D represents a ##STR2## group, R, x, Z, R', R" and M being as defined above, m is a positive integer corresponding to the number of units A in the polymer, PA0 p and q are each independently 0 or a positi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.