Process for the dyeing and printing of polyester material
Patent 4078890 Issued on March 14, 1978. Estimated Expiration Date: 
March 14, 1995. 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.
March 14, 1995. 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 1931806 2290945 2359862 3255173 InventorsAssigneeApplicationNo. 05/684041 filed on 05/07/1976US Classes:8/672, Dye containing removable solubilizing group, e.g., lactam radical, etc., or the dye is oxidized to insolubilize534/753, Azo bonded directly to the hetero ring or to a polycyclo ring system which contains the hetero ring as one of the cyclos534/772, Plural acyclic chalcogens bonded directly to the hetero ring at the two positions adjacent to the ring nitrogen534/788, The hetero ring consists of sulfur, nitrogen and carbon (e.g., benzothiazole, etc.)534/793, Sulfonyl containing534/795, The hetero ring is five-membered and contains at least one atom each of sulfur, nitrogen and carbon534/816, Exactly two azo groups attached indirectly to each other by nonionic bonding534/829, Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl, etc.)534/831, Plural benzene rings bonded directly to each azo group534/844, Sulfonyl containing534/850, Containing -C(=X)-, wherein X is chalcogen534/857, Hydroxy bonded directly to acyclic carbon or carbon chain (H of hydroxy may be replaced by the ammonium ion or Group IA or IIA light metal)546/47, Plural ring hetero atoms in the pentacyclo ring system552/241, Additional carbon bonded directly to the oxygen552/242, The additional carbon is part of a ring552/245, Carbon bonded directly to the anthracene configured ring system552/246, Oxygen bonded directly to the nitrogen (e.g., nitro bonded directly at 8 position, etc.)552/251, Carbon bonded directly to the anthracene configured ring system8/673, Dye containing -COOH8/680, Dye containing -(o=)s(=o)-o-, -o(o=)s(=o)-o- or phosphorus oxide group8/922Polyester fiberExaminersPrimary: Levy, DonaldAttorney, Agent or FirmAbstractThe invention relates to a process for the dyeing and printing of polyester material in a weakly acid, neutral or alkaline solution of at least one altered dispersion dyestuff water-soluble at an intermediate stage and containing a carbacyl group which is bound by way of an oxygen atom, and which can be split off under the dyeing conditions, the said carbacyl group carrying at least one sulphonic acid or carboxylic acid group, to a process for the production of these dyestuffs water-soluble at an intermediate stage, as well as to new water-soluble dyestuffs. Compared with the conventional process of dispersion dyeing, this process offers certain definite advantages, namely, the dyestuffs need not be present as a dispersion, the complicated milling problems associated with dispersion dyestuffs are eliminated; no dispersing agents are required, which are mostly toxic and thus burden the effluent; and hence, furthermore, the troublesome foam problems normally occurring in large-scale dyeing plants are likewise avoided.Other References
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