Process for producing dioxazine violet pigment

Details Process for producing dioxazine violet pigment Process for producing dioxazine violet pigment

1980-08-12

1982-03-02

Ford, John M.

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

Organic compounds

Chalcogen in the nitrogen containing substituent

C07D49822

Patent

active

043179088

ABSTRACT:
Dioxazine violet pigment having a stable crystal form is advantageously produced by heating a mixture containing an aqueous suspension of a metastable dioxazine violet pigment obtainable in a conventional manner and an aromatic compound having a low solubility in water such as benzoic acid. This stable pigment is useful as a paint and excellent in tinting strength, gloss and dispersibility.

REFERENCES:
patent: 2026092 (1935-12-01), Kranzlein et al.
patent: 2066915 (1937-01-01), Thiess et al.
patent: 2918465 (1959-12-01), Lytle et al.
patent: 3022299 (1962-02-01), Schmidt et al.
Herbst, Journal of Paint Technology, vol. 45, No. 579, pp. 39 to 50, (1973).
Hafner, Chem. Abst., vol. 77, Abst. No. 166,240t, (1972).
Hafner, Chem. Abst., vol. 82, Abst. 18683c, (1975).
CIBA Ltd., Chemd. Abst., vol. 57, Abst. of Brit. Patent 892,733, Across Cols. 12671-12672, (1962).

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