.beta.-crystal form of 4,4'-Diamino-3,3'-Dibromo-1,1'-Dianthraquinonyl
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United States of America Patent
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Aug 6, 1996
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N/A
app pub date -
Jun 21, 1995
filing date -
Jun 23, 1994
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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.
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