Crosslinking a hydroxyethylsulphonyl dye on cottonto achieve covalent fixation in a long-liquor process

Authors: Lewis D.M.; Yao J.

Source: Coloration Technology, Volume 116, Number 9, 2000 , pp. 285-290(6)

Publisher: Society of Dyers and Colourists

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Abstract:

A heterobifunctional [dichlorotriazine and vinylsulphone (DCT-VS)] reactive crosslinker, 2,4-dichloro- 6-{p-[(2 prime -sulphatoethyl)sulphonyl]phenylamino}-1,3,5-triazine (DC-SES) was synthesised and coapplied with nicotinic acid to covalently fix hydrolysed CI Reactive Black 5 (HBB) (hydroxyethylsulphonyl dye) to cotton in a long-liquor process. It is suggested that a very active quaternised nicotinic acid ammonium salt of DC-SES was generated in situ, which reacts readily with HBB and cellulose leading to dye fixation. Further dye fixation can be obtained by the addition of alkali at 60 °C; the final fixation value from this system is very good. Application of this system as an aftertreatment in the conventional CI Reactive Black 5 dyeing bath, results in 10–15% higher exhaustion and fixation values compared to the usual dyeing procedure.

Language: English

Document Type: Regular paper

Affiliations: 1: Department of Colour Chemistry, University of Leeds, Leeds, LS2 9JY, UK

Publication date: 2000-01-01

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