Preparation of a pigmentary form of perylene-3,4,9,10-tetracarbo

Details Preparation of a pigmentary form of perylene-3,4,9,10-tetracarbo Preparation of a pigmentary form of perylene-3,4,9,10-tetracarbo

1979-08-24

1981-08-25

Berch, Mark L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

8657, 10628721, C07D47106, C09B 318

Patent

active

042860946

ABSTRACT:
A process for the preparation of pigmentary forms of perylene-3,4,9,10-tetracarboxylic acid diimide, wherein the diimide is converted to the leuco compound and the latter is oxidized in aqueous suspension, either with exposure to shearing forces in the presence of surfactants, or in the absence of shearing forces and in the presence of non-ionic surfactants, or of mixtures of non-ionic and anionic surfactants.
The perylenetetracarboxylic acid diimide pigments give deep, brilliant and transparent full-shade colorations. In white reductions, they give distinctly reddish colorations.

REFERENCES:
patent: 1506545 (1924-08-01), Schmidt
patent: 3615800 (1971-10-01), Spietschka
patent: 3752686 (1973-08-01), Kalz
patent: 3976649 (1976-08-01), Fabian
BIOS, Final Report #1484, p. 21.

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