Direct disazo dyestuffs
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United States of America Patent
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Nov 4, 1997
Grant Date -
N/A
app pub date -
Jul 5, 1996
filing date -
Jul 14, 1995
priority date (Note) -
Expired
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Abstract
Dyestuffs of the formula (I) ##STR1## wherein R.sup.1 and R.sup.4 independently of one another represent an acyl radical, R.sup.2 and R.sup.3 independently of one another represent hydrogen or unsubstituted or substituted C.sub.1 -C.sub.4 -alkyl, X represents a bridge member which is not fibre-reactive and n and m independently of one another represent 1 or 2, are outstandingly suitable for dyeing and printing substrates containing hydroxyl and/or amide groups, in particular for printing paper by the ink-jet method.
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