Colored polymers from azo dye monomers containing olefinic groups
US5188641A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1992 |
| Grant date | Feb 23, 1993 |
| Priority date | — |
| Expiry date | Jan 9, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/922
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A colored polymer containing repeat units derived from at least one azo dye which is free from water-solubilizing groups and contains at least one polymerizable olefinically unsaturated group and has the formula: EQU A--N.dbd.N--E wherein A represents the residue of a carbocyclic or heterocyclic diazotisable amine containing at least one electron-withdrawing substituent and E represents the residue of a carbocyclic or heterocyclic coupling component with the proviso that when both A and E are carbocyclic, the residue of the diazotisable amine does not contain a nitro or chloro substituent except when another different electron-withdrawing substituent is also present, the or each polymerizable group being attached to a carbon atom forming part of residue A or E.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.