Process for dyeing high-molecular organic material, and novel polycyclic pigments
US4415685A · kind A · utility
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11Claims
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Key dates
| Filing date | Mar 16, 1982 |
| Grant date | Nov 15, 1983 |
| Priority date | — |
| Expiry date | Mar 16, 2002 |
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-pyrrolo[3,4-c]-pyrrole 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.
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