Carboxylic acid type water-soluble sulfur dye

摘要

The present invention provides a group of water-soluble sulfur dye having carboxyl groups. For the kind of dye, a sulfur dye is first reduced to a leuco compound by sodium sulfide, and the leuco compound reacts with an active compound containing carboxyl groups to obtain a water-soluble sulfur dye containing the carboxyl group. The water-soluble sulfur dye provided by the present invention is applicable to dying of cotton, wool, silk, and leather. Being both water-soluble and carboxyl group reactive, the product has a simple application process and desirable color fastness, thereby having broad application prospects.

主权项

1. A carboxylic acid type water-soluble sulfur dye comprising a parent compound and a number of carboxyl groups of formula I attached to the parent compound, wherein R1 and R2 are each independently selected from the group consisting of Cl, F, OH, formula Ia, formula Ib, and formula Ic, with the proviso that R1 and R2 are not simultaneously Cl, F, or OH; R3 is selected form the group consisting of H, CH3, (CH3)2CH, CH3CH(CH3)CH2, CH3CH2CH(CH3), CH2OH, HSCH2, CH3SCH2CH2, C5H6CH2, CH2COOH, and CH2CH2COOH; R4 is selected from the group consisting of H, Cl, Br, CH3, OH, NH2, NO2, and COOH; R5 is selected from the group consisting of —CH2—, —CH2CH2—, —CH(CH3)—, —CH(CH2CH3)—, and —CH(CH(SH)COOH)—; and X is selected from the group consisting of NH and O, wherein the parent compound is one selected from the group consisting of C.I. Sulphur Black 1, 2, 5, 6, 7, 10, 11, and 12; or one selected from the group consisting of C.I. Sulphur Yellow 2, 9, 16, 19, and 20; or one selected from the group consisting of C.I. Sulphur Orange 1 and 3; or one selected from the group consisting of C.I. Sulphur Brown 8, 10, 12, 15, 16, 21, 51, 52, 63, 88, and 90; or one selected from the group consisting of C.I. Sulphur Blue 2, 3, 5, 7, 9, 11, 13, 15, and 19; or one selected from the group consisting of C.I. Sulphur Red 2, 6, 7, 10, 11, 12, 13, and 14; or one selected from the group consisting of C.I. Sulphur Green 1, 2, 3, 6, 9, 19, 22, 25, 27, 31, 36, and 37.