Crystal modification of a diketopyrrolopyrrole pigment

Details Crystal modification of a diketopyrrolopyrrole pigment Crystal modification of a diketopyrrolopyrrole pigment

1995-06-22

1997-07-22

Morris, Patricia L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D48704

Patent

active

056505205

ABSTRACT:
Diketopyrrolopyrrole of the formula ##STR1## in its .beta.-modification. The new .beta.-modification is likewise suitable as a pigment for coloring high-molecular weight organic material and, in comparison to the a-modification, shows a shift in shade towards yellowish-red.

REFERENCES:
patent: 4415685 (1983-11-01), Iqbal et al.
patent: 4579949 (1986-04-01), Rochat et al.
W. Herbst, K. Hunger: Industrial Organic Pigments pp. 41-43, pp. 427-428 & 453-454 (1993).
J. Mizuguchi et al., Acta Crystallograpica, vol. B48, Part 5, pp. 696-700, (1992).

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