Perylene-3,4,9,10-tetracarboxylic acid diimide pigment, its manu

Details Perylene-3,4,9,10-tetracarboxylic acid diimide pigment, its manu Perylene-3,4,9,10-tetracarboxylic acid diimide pigment, its manu

1976-09-22

1978-09-19

Daus, Donald G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

8 1R, D06P 1649, C07D47106

Patent

active

041153863

ABSTRACT:
A new pigmentary form of perylene-3,4,9,10-tetracarboxylic acid diimide of the formula ##STR1## which has a specific surface area (measured by the BET method) of from 10 to 35 m.sup.2 /g and a maximum in the particle size distribution at from 0.1 to 0.5 .mu.m, the proportion of particles between these sizes being at least 50% of the total distribution and the mean ratio of length to width being from 3:1 to 1:1. The pure shade of the new pigmentary form gives strongly yellowish red colorations which are very pure and very bright. The new pigmentary form also has a good hiding power, which is from 2 to 3 times as great as that of the pigmentary forms of the prior art.

REFERENCES:
patent: 2905685 (1959-09-01), Eckert et al.
patent: 2905686 (1959-09-01), Eckert et al.
patent: 3006882 (1961-10-01), Altermatt
patent: 3022299 (1962-02-01), Schmidt et al.
patent: 3772303 (1973-11-01), Spietschka et al.
patent: 3974136 (1976-08-01), Hunger et al.

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