1,4-Diketo-pyrrolo[3,4-c]pyrroles
US4490542A · kind A · utility
19Cited by
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Key dates
| Filing date | Aug 1, 1983 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Aug 1, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B57/004
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for dyeing high-molecular organic material in the bulk characterized by the use of a 1,4-diketo-pyrrole[3,4-c]-pyrrol of the formula ##STR1## wherein R.sub.1 and R.sub.2 are isocyclic or heterocyclic aromatic radicals, preferably unsubstituted or substituted phenyl or naphthyl radicals. The dyeings obtained, for example in plastics, fibres, lacquers and printings, are distinguished by very high coloring strength, high saturation, good dispersibility, good fastness to cross-lacquering, migration, heat, light and weather, and also by a high gloss and a good IR-remission behavior.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.