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

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

1995-06-21

1996-08-06

Bell, Mark L.

Compositions: coating or plastic

Materials or ingredients

Pigment, filler, or aggregate compositions, e.g., stone,...

552212, C09B 122, C07C22534, C07C 5018

Patent

active

055429750

ABSTRACT:
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.

REFERENCES:
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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