Reactive dyes containing a permanent quaternary ammonium group
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United States of America Patent
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Jul 20, 1999
Issued Date -
N/A
app pub date -
May 11, 1998
filing date -
Mar 25, 1997
priority date (Note) -
Expired
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Abstract
A fiber-reactive dye corresponding to formula (1) ##STR1## in which: Fb is the radical of an azo dye, of a heavy metal complex azo dye, of a formazan dye, of a triphenodioxazine dye or of a phthalocyanine dye; U.sup.(+) is a permanent quaternary ammonium group; A.sup.(-) is a colorless anion, and R.sup.x, R.sub.4, G, Q and n are as defined in the specification, with the proviso that the dye contains at least one group of the vinylsulfone series, such as a group of the formula --SO.sub.2 Y, wherein Y is as defined in the specification, these dyes being capable of dyeing hydroxy-and/or carboxamido-containing fibres, such as cellulosic fibre and wool.
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