Acid yellow dye and method for using same
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United States of America Patent
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Apr 4, 2000
Grant Date -
N/A
app pub date -
Apr 27, 1999
filing date -
Nov 20, 1996
priority date (Note) -
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status (Latency Note)
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Abstract
The invention is a composition of matter useful as an acid yellow dye having formula (I) ##STR1## wherein: X is hydrogen or SO.sub.3.sup.- M.sup.+ ; M.sup.+ Na.sup.+, Li.sup.+, K.sup.+, NH.sub.4.sup.+, or hydroxyalkylammonium of the formula [H--(OCH.sub.2 CH.sub.2).sub.n ].sub.p NH.sub.m, where n is 1 to 5, p is 1 to 3, and p+m is 4; R.sub.1 is hydrogen, a metal ion, an alkyl or C.sub.1-4, of hydroxyalkyl of C.sub.1-4, and combinations thereof; and R.sub.2 is an unsubstituted aromatic ring or a substituted aromatic ring having at least one substituent, provided that when one of the substituents is SO.sub.3.sup.- M.sup.+, X is hydrogen; and combinations thereof. The invention also includes a process for dyeing a material with this compound and the material so dyed.
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