Azo dyes, a process for their preparation and their use in the dyeing or printing of hydrophobic fiber materials
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United States of America Patent
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Apr 1, 2003
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N/A
app pub date -
Sep 18, 2000
filing date -
Sep 20, 1999
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Abstract
The present invention relates to dyes of formula ##STR1## wherein R.sub.1 is hydrogen, bromine, chlorine, cyano, R.sub.2 is hydrogen, methyl, acetylamino, R.sub.3 is ethyl unsubstituted or substituted by cyano or by acyloxy, R.sub.4 is ethyl unsubstituted or substituted by cyano or by acyloxy, to a process for their preparation and to their use in the dyeing or printing of hydrophobic fiber materials.
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