2-amino-5-nitrothiazole derived monoazo disperse dyes
Patent 5652344 Issued on July 29, 1997. Estimated Expiration Date: 
September 25, 2016. 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.
September 25, 2016. 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 2659719 2790791 3775049 5-Nitrothiazolyl-2-azophenyl disperse dyes Process for the dyeing and printing of polyester material Thiazoleazophenylaminoethyl carbonyloxy-C8 -C10 -alkyl compounds useful as dyes for polyester fibers Patent #: 4642339 InventorsAssigneeApplicationNo. 719653 filed on 09/25/1996US Classes:534/795The hetero ring is five-membered and contains at least one atom each of sulfur, nitrogen and carbonExaminersPrimary: Higel, Floyd D.Attorney, Agent or FirmForeign Patent References
International ClassesC09B 029/042C09B 029/085 D06P 011/18 D06P 003/42 D06P 003/54 Abstract2-amino-5-nitrothiazole derived compounds having the following formula: ##STR1## Wherein R1=H or alkyl of 1-4 carbons, R2=alkyl of 1-4 carbons or allyl group and R3=H, halogen or alkyl of 1-4 carbons.The invented compounds are suited for disperse dyestuffs and are able to dye polyester and cellulose acetate fibers with excellent build-up, exhaustion and sublimation fastness. The invention also provides a process for the preparation of the new compounds. |
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