Polymeric dye compounds and compositions and methods for coloring hair
US6306182A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2000 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Mar 10, 2020 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61K2800/57
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
A compound of the formula: ##STR1## wherein: PA1 n, y, and z are each independently integers ranging from 1 to 100,000; PA1 R.sup.1 through R.sup.6, and R.sup.8 are each independently H, C.sub.1-6 alkyl, hydroxyalkyl, substituted or unsubstituted aminoalkyl; or R.sup.4 and R.sup.5 together form a substituted or unsubstituted heterocyclic 5 to 6 membered ring wherein the substituents are selected from C.sub.1-6 alkyl, hydroxyalkyl, or aminoalkyl; PA1 R.sup.7 is H or SR.sup.1, or S--R.sup.7 in the above formula together form an isothiouronium salt or Bunte salt; PA1 X is a linking group; and PA1 D is a chromophore that absorbs visible light; hair dye compositions containing the polymeric compound; and a method for dyeing hair.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.