Cationic sulfonic acid dyes
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United States of America Patent
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Apr 11, 2000
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N/A
app pub date -
Apr 6, 1999
filing date -
Apr 9, 1998
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Abstract
Cationic sulfonic acid dyes of the formula I ##STR1## where the variables are as defined in the specification, are useful for the dyeing or printing of polymeric material.
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