1,4-Diketo-pyrrolo[3,4-c]pyrroles

Details 1,4-Diketo-pyrrolo[3,4-c]pyrroles 1,4-Diketo-pyrrolo[3,4-c]pyrroles

1983-08-01

1984-12-25

Hollrah, Glennon H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D48708

Patent

active

044905424

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.

REFERENCES:
Farnum et al., Tetrahedron Letters, pp. 2549-2552 (1974).

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