Preparation of brilliant, transparent pigmentary bromo-isoviolan

Details Preparation of brilliant, transparent pigmentary bromo-isoviolan Preparation of brilliant, transparent pigmentary bromo-isoviolan

1980-03-04

1981-11-03

Douglas, Winston A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C09B 322

Patent

active

042985340

ABSTRACT:
A process for the preparation of pigmentary forms of bromoisoviolanthrone, wherein the leuco compound is oxidized in an aqueous alkaline medium, in the presence of a surfactant, at from 10.degree. to 100.degree. C., with exposure to shearing forces.
The pigment obtained gives full-shade colorations which are very transparent and very brilliant, while in white reductions very deep colorations are obtained.

REFERENCES:
patent: 2882280 (1959-04-01), Gruenebaum et al.
patent: 2898337 (1959-08-01), McSheehy
patent: 3127412 (1964-03-01), Gaertner et al.

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