Reaction of carboxylic dyes with wool and polyamide. Part III: Effect of the activating agent

Dyes containing a carboxylic acid group had been shown to react with wool and polyamide fibres when activated with ethyl chloroformate (Parts I and II). One of the dyes, 3-aminobenzoic acid →N,N-dimethylaniline, was, in this work, activated with other chlorofirmates, so as to improve the dyeing cond...

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Bibliographic Details
Published in:Dyes and pigments 1998-03, Vol.36 (4), p.373-379
Main Authors: Gonçalves, M.S.T., Oliveira-Campos, A.m.F., Moura, J.C.V.P., Maia, H.L.S., Gomes, J.I.N.R., Hrdina, R.
Format: Article
Language:English
Subjects:
Applied sciences
carboxylic
Chemical industry and chemicals
dyes
Dyes, pigments
Exact sciences and technology
Fibers and threads
Forms of application and semi-finished materials
Industrial chemicals
polyamide
Polymer industry, paints, wood
reactive
Technology of polymers
wool
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Summary:Dyes containing a carboxylic acid group had been shown to react with wool and polyamide fibres when activated with ethyl chloroformate (Parts I and II). One of the dyes, 3-aminobenzoic acid →N,N-dimethylaniline, was, in this work, activated with other chlorofirmates, so as to improve the dyeing conditions. Benzyl chloroformate was found to be a good substitute since it is not as volatile as ethyl chloroformate, which suggests that it will be easier to apply in practical dyeing conditions. The yield of the reaction with cyclohexylamine is similar to the one obtained with ethyl chloroformate, suggesting that the fixation of the dye on wool or polyamide will be much the same. The fastness results are also equivalent.
ISSN:0143-7208
1873-3743
DOI:10.1016/S0143-7208(97)00024-7