1,7-diaroxy- or 1,7-arylthio-substituted perylene-3,4,9,10-tetracarboxylic acids, their dianhydrides and diimides
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United States of America Patent
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Nov 7, 2000
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N/A
app pub date -
Jun 18, 1998
filing date -
Dec 18, 1995
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Abstract
1,7-Disubstituted perylene-3,4,9,10-tetracarboxylic dianhydrides I and perylene-3,4,9,10-tetracarboxylic acids Ia ##STR1## where R is substituted or unsubstituted aryloxy, arylthio, hetaryloxy or hetarylthio, their preparation and use as pigments, laser dyes and precursors for preparing fluorescent dyes, polymeric colorants, pigments and pigment additives, and 1,7-disubstituted perylene-3,4,9,10-tetracarboxylic diimides (VI) as intermediates thereof.
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