Process for dyeing polyamidic textile materials, in particular high dyeing speed polyamides with acid dyes and alkaline reactants
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United States of America Patent
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Apr 26, 1983
Grant Date -
N/A
app pub date -
Mar 18, 1981
filing date -
Mar 19, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process is described for the fast dyeing of textile materials constitut at least to a significant degree, by polyamides, in particular quick dyeing polyamides, characterized in that a dye bath is employed comprising acid dyes to which a combination of reagents (e.g. ammonium sulphate and caustic soda) is added that is adapted to impart to the bath an initial alkaline pH and to lower the pH by elimination of volatile bases, at least at the final heating temperatures, and in that the bath is heated until final temperatures between 60.degree. C. and 80.degree. C. are attained.
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