Hoechst Aktiengesellschaft

Armand Lehinant

Joachim W Lehmann

Hans-Peter Maier

Hans-Ulrich Von Der Eltz

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.

Process for the dyeing of wool with reactive dyestuffs

A process for the dyeing of textiles consisting totally or partially of synthetic polyamide fibers with reactive dyes according to the batchwise exhauston method, which comprises dyeing with aqueous dye liquors containing one or several reactive dyes, whose starting pH values are in the slightly acid to neutral range, in the high temperature range at 105.degree. to 140.degree. C. without the addition of alkalis or alkali-yielding agents and without the addition of acids or acid-yielding agents.

Process for the dyeing of synthetic polyamide fibers with reactive dyes

A process for the dyeing of textiles which consist totally or partially of cellulose fibers, with reactive dyes according to the batchwise exhaustion method, which comprises using aqueous dye liquors containing one or several reactive dyes as well as at least one neutral electrolyte, the initial pH values of said liquors being in the slightly acid range, in the high temperature range at 110.degree. to 140.degree. C. without the addition of an alkali or alkali-yielding agents.

Process for the dyeing of cellulose fibers with reactive dyes according

Process for the continuous dyeing and printing of piece goods made of synthetic polyamide fibers, preferably blended with cellulosic fibers, using reactive dyestuffs according to a thermofixing method, by applying onto the textile material an aqueous padding liquor or a printing paste, which has been weakly acidified by means of a buffer system of acetic acid and an alkali metal acetate and which contains a fiber-reactive dyestuff whose reactive groups have reversibly been masked by reaction with an alkali metal salt of an N-alkyl-aminoalkyl-sulfonic acid, and after drying of the material fixing the dyestuff on the two fiber components by means of dry heat.

Process for the continuous dyeing and printing of piece goods

Waste waters containing water glass, for example resulting from the dyeing of fabrics are purified by adding small amounts of basic nitrogen compounds, e.g. amines to the waste water and then carrying out the known flocculation process.

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Offenbach am Main, Germany

Armand Lehinant