.beta.-crystal form of 4,4'-Diamino-3,3'-Dibromo-1,1'-Dianthraqu

Compositions: coating or plastic – Materials or ingredients – Pigment – filler – or aggregate compositions – e.g. – stone,...


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552212, C09B 122, C07C22534, C07C 5018




The new .beta.-modification of the pigment 4,4'-diamino-3,3'-dibromo-1,1'-dianthraquinonyl, having characteristic lines in the X-ray diagram (Guinier/De Wolff, Cu K.alpha..sub.1 -radiation) according to the FIG. 1 has significant dyeing advantages over the known .alpha.-modification.

patent: 5383966 (1995-01-01), Johnson
patent: 5393899 (1995-02-01), Inoue et al.
patent: 5416263 (1995-05-01), Sakaguchi et al.


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