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Triazinylamino‐alkylphosphonate reactive dyes for cellulosic fibres
Author(s) -
Gillingham Estelle L,
Lewis David M,
Nabi Asfia,
Srikulkit Kawee
Publication year - 2007
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/j.1478-4408.2007.00078.x
Subject(s) - cyanamide , chemistry , reactive dye , triazine , salt (chemistry) , phosphonate , ammonium , acid dye , polymer chemistry , phosphate , nuclear chemistry , bifunctional , organic chemistry , dyeing , catalysis
A bifunctional reactive bis‐phosphonoalkylaminotriazine dye was synthesised by condensing 2 mol of aminoethylphosphonic acid with the commercially available bis‐monochloro‐ s ‐triazinyl dye, CI Reactive Red 120. A similar but much lower molecular weight dye was prepared by condensing the commercially available dichloro‐ s ‐triazine dye, Procion Red MX 8B, with aminomethylphosphonate. A model aryl‐phosphonate dye was also prepared by diazotising m ‐aminobenzene‐phosphonic acid and coupling the diazonium salt to R‐salt. These dyes were isolated as their free acids and then converted to their ammonium salts. Pad liquors containing dye, cyanamide and ammonium dihydrogen phosphate were applied to cotton fabric. In the case of the bis‐phosphonoethylamino‐ s ‐triazine dye, very high dye–fibre fixation values (>90%) were achieved using a pad–batch–bake procedure; for the Procion T model dye, the comparative maximum fixation was only modest. In the absence of cyanamide, no fixation could be obtained for the arylphosphonate dye but both bis‐phosphonoalkylaminotriazine dyes gave significant fixation.