Document Type and Number:
Japanese Patent JPS6245271
Kind Code:
B2
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.
Inventors:
HERUMUUTO HOTSUHO
HAINRITSUHI HIRAA
HAINRITSUHI HIRAA
Application Number:
JP10978379A
Publication Date:
September 25, 1987
Filing Date:
August 30, 1979
Export Citation:
Assignee:
BASF AG
International Classes:
C09B5/62; C09B67/10; C09B67/20