5-Nitrothiazolyl-2-azophenyl disperse dyes
Patent 3997520 Issued on December 14, 1976. Estimated Expiration Date: 
December 14, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
December 14, 1993. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2683708 2730523 2746953 InventorAssigneeApplicationNo. 487586 filed on 07/11/1974US Classes:534/795, The hetero ring is five-membered and contains at least one atom each of sulfur, nitrogen and carbon534/581, Formation of azo group by coupling diazonium compound with coupling component in presence of an additional organic compound534/582, Formation of azo group by coupling diazonium compound with coupling component at a specified pH range534/643, Alkylene, alkenyl or alkenylene bonded directly to carboxamido, urea or -C(=X)-, wherein X is chalcogen, which group is between a ring and the alkylene, alkenyl or alkenylene8/595, Tannins or tannic acid8/921, Cellulose ester or ether8/922, Polyester fiber8/924Polyamide fiberExaminersPrimary: Warren, Charles F.Attorney, Agent or FirmForeign Application Priority Data1973-07-17 CHAbstractThis invention relates to monoazo compounds of the formula I, ##STR1## in which R1 signifies a hydrogen atom, an alkyl radical or an unsubstituted or substituted phenyl radical,Each of R2 and R3 signifies a hydrogen atom, a cycloalkyl radical, an alkenyl radical or an unsubstituted or substituted alkyl radical, with the proviso that when one of R2 and R3 signifies a hydrogen atom, the other has a significance other than hydrogen,R4 signifies an - or ଲ-chloro- or bromoethyl radical,R5 signifies a hydrogen atom or a methoxy or ethoxy radical, andX signifies a group of the formula --CO--or --CO--O--.These compounds are useful as disperse dyes, particularly for the exhaust dyeing, pad dyeing and printing of synthetic and semi-synthetic hydrophobic materials such as linear and aromatic polyesters, cellulose acetates and polyamides. The dyeings exhibit good fastness to light, heat treatments, wet treatments, solvents, lubricants, rubbing, cross-dyeing, ozone, gas fumes and chlorine. |
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