Process for converting crude and/or coarsely crystalline perylen

Details Process for converting crude and/or coarsely crystalline perylen Process for converting crude and/or coarsely crystalline perylen

1979-07-05

1981-04-21

Berch, Mark L.

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241 15, 241 17, 241 21, 241184, 546 37, 260155, 544296, 8657, 106288Q, B02C 404, B02C 1300, C07D47106, C07D40312

Patent

active

042628512

ABSTRACT:
A process for converting a crude, coarsely crystalline perylene-3,4,9,10-tetracarboxylic acid diimide of the formula ##STR1## where A is unsubstituted or substituted phenyl, an unsaturated 5-membered or 6-membered heterocyclic ring which contains one or two nitrogen atoms and may be fused to a benzene nucleus, C.sub.3 -C.sub.6 -alkyl, or C.sub.2 -C.sub.3 -alkyl which is substituted by C.sub.1 -C.sub.4 -alkoxy, phenyl or C-acylamino, to a pigmentary form, wherein the crude pigment, in aqueous suspension, is comminuted in a high-speed mill in the absence of a surfactant.
The pigments obtained give pure shade colorations of high to extremely high hiding power, and have a high tinctorial strength in white reductions.

REFERENCES:
patent: 3206127 (1965-09-01), Morris et al.
patent: 3313491 (1967-04-01), Lucchini et al.
patent: 3346551 (1967-10-01), Anton
patent: 4013481 (1977-03-01), Molls et al.
patent: 4115386 (1978-09-01), Gall et al.
Engels I, Farbe und Lack, 71, #5, pp. 375-385, (1965).
Engels II, Farbe und Lack, 75 #10, pp. 953-961, (1969).

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