Organic compounds -- part of the class 532-570 series – Organic compounds – Azo
Reexamination Certificate
2006-02-28
2006-02-28
Powers, Fiona T. (Department: 1626)
Organic compounds -- part of the class 532-570 series
Organic compounds
Azo
C534S773000, C008S662000, C008S920000
Reexamination Certificate
active
07005507
ABSTRACT:
The present invention relates to an azo dye of formula (1), wherein R1is the radical of a diazo component of the benzene, naphthalene, diphenyl, azobenzene, thiophene, benzothiazole, thiadiazole, indazole, benzatriazole, pyrazole, anthraquinone, naphtholic acid imide, chromone, phthalimide or diphenylene oxide series, R2is an unsubstitued or substitued aryl radical or an unsubstituted or substituted aralkyl radical and R3is an unsubstituted or substituted aryl radical or an unsubstituted or substituted aralkyl radical, with the proviso that one of the substituents R2and R3is an unsubstituted or substituted aryl radical and the other is an unsubstituted or substituted aralkyl radical, 2-hydroxy-2-phenylethyl being expected as a substituted aralkyl radical, to mixtures comprising at least two structually different azo dyes of formula (1) and to the use of those azo dyes and dye mixtures in the dyeing or printing of semi-synthetic or synthetic hydrophobic fibre materials.
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Lauk Urs
Pichler Yvonne
Ciba Specialty Chemicals Corporation
Mansfield Kevin T.
Powers Fiona T.
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