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AssigneeHoechst Aktiengesellschaft
InventorsHans-Ulrich von der Eltz, Armand Lehinant, Joachim W. Lehmann, Hans-Peter Maier
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A process for the dyeing of textiles consisting of wool without anti-felt finish or wool having an anti-felt finish in the form of a coating of a polyimine resin or a polyacrylic resin, or textiles containing such wool, with reactive dyes according to the exhaust method, which comprises dyeing said textiles in aqueous dyeing baths containing at least one commercial reactive dyestuff the starting pH of which is in the weakly acidic to neutral range, by heating rapidly to the dyeing temperature of 110.degree. to 125.degree. C. immediately after addition of the dissolved dyestuff, and by dyeing at this temperature for 10 to 20 minutes, while omitting the addition of pH-regulating substances during the whole dyeing operation.
In a process for the dyeing of a textile containing wool without anti-felting finish, or wool having an anti-felting finish in the form of a coating layer of a polyimine resin or a polyacrylic resin, with reactive dyes according to the batchwise exhaustion method, the improvement which comprises contacting the textile material with an aqueous dyeing liquor containing one or more reactive dyestuffs, the initial pH value of said dye liquor being in the weakly acidic to neutral range, heating said dye liquor, beginning immediately after addition of the dissolved reactive dyestuff, to a dyeing temperature in the range of from 110.degree. to 125.degree. C. within 5 to 10 minutes, and dyeing the textile material at this temperature for 10 to 20 minutes, without pretreatment of the textile with an amphoteric auxiliary and without the addition of a pH-regulating substance in the course of the effective contact of the textile material with the dye liquor during the process.
Dependencies are inferred from the claim text.