The effect of dispersing agent on the dyeing of polyester fabrics with disperse dyes derived from 1,4-diethyl-2,6-dioxo-1,2,5,6-tetrahydropyridine-3-carbonitrile

Abstract

KEYWORDS1,4-Diethyl-2,6-dioxo-1,2,5,6-tetrahydropyridine-3-carbonitrile (8), is synthesized by reacting ethyl cyanoacetate with ethyl amine to produce the amide 4, which when reacted with methyl propionylacetate, afforded compound 8. Compound 8 is then coupled with aromatic diazonium salts to give the corresponding arylhydrazono-1,4-diethyl-2,6-dioxo-1,2,5,6-tetrahydropyridine-3-carbonitrile disperse dyes, 11a-d, whose structures were elucidated by using X-ray crystal structure determinations. A high temperature dyeing method was employed to apply these dyes for polyester fabrics. The relationship between dyeing properties and the concentration of dispersing agent present in a dye bath is evaluated.Disperse dyes Polyester fabrics Fastness properties Dispersing agent Sodium lignin sulfonate X-ray crystal structure determinations

Synthesis, characterization and antimicrobial activity, and applications of new azo pyridone disperse dyes on polyester fabric

“…Compounds 10a, 10b, 10c and 10f have been confirmed by our recently reported spectroscopic data [11]. …”

“…The precipitate was collected, washed with water and dried to give compound 9 (Scheme 1). Compound 9 has been confirmed by our recently reported spectroscopic data [11].…”

“…A cold solution of aryldiazonium salt (10 mmol), prepared by adding a solution of sodium nitrite (1.00 g in 10 mL H2O) to a cold solution of arylamine hydrochloride (10 mmol) with stirring as described earlier [11]. The aryldiazonium salts were added to the cold solution of compound 9 (10 mmol) in ethanol (20 mL) containing sodium acetate (2.00 g).…”

“…For further investigation in the synthesis of pyridinone disperse dyes [11], this paper reports the synthesis of 1,4-diethyl-2,6-dioxo-1,2,5,6-tetrahydropyridine-3-carbonitrile, 9, using microwave irradiation as energy source. The latter 9 was served as a good precursor for the synthesis of novel arylhydrazono-1,4-diethyl-2,6-dioxo-1,2,5,6-tetrahydropyridine-3-carbonitriles disperse dyes for the dyeing of polyester fabrics.…”

Pyridazine and its related compounds: Part 33. Synthesis of some disperse dyes derived from 3-hydrazinyl-4,5-diphenyl-1H-pyrazolo[3,4-c]pyridazine and their color assessment on polyester fabric

“…Conditions of such tests are chosen to correspond closely to treatments employed in manufacture and ordinary use conditions [11]. Results are given after usual matching of tested samples against standard reference [11,13,14].…”