Hoechst Aktiengesellschaft

Hoechst Akteingesellschaft

Hans-Peter Maier

Joachim W Lehmann

Armand Lehinant

Hans-Ulrich Von Der Eltz

Erich Feess

Siegfried Muller

Birgid Fadler Nee Jack

Harpal Singh

Poor wet fastness properties and unsatisfactory fastness to thermofixing of dyeings on carrierfree-dyeing PES fibers with conventional disperse dyestuffs preclude the deployment of textile material of this type in the industrial wear and contract business, such as for utilitarian textiles, sportswear or the like. The reduced boil-wash stability of such disperse dyestuffs on the modified fibers can lead to washing problems because of the risk of bleeding. Using disperse dyestuffs which contain highly polarized groupings in the molecule for dyeing carrierfree-dyeing PES fibers by the exhaust method, by the padding technique or by the padding/wind-up technique considerably improves the dyeing results in respect of the fastness properties sought and hence opens up further areas of use for said types of fiber.

Process for dyeing modified polyester fiber textile material in absence

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

Semi-continuous process for dyeing of flat woolen textile articles with 1:2 or 1:1 metal complex dyestuffs, by padding the textile material with an aqueous liquor containing the dissolved dyestuffs and of from 80 to 120 g/l of dissolved urea, at a temperature of from 60 to 80.degree. C. and batching it up without intermediate drying, optionally with further heating, and allowing it to dwell in this state at a temperature of from 75 to 85.degree. C. for a period of from 4 to 14 hours.

Process for the dyeing of wool

The invention relates to a process for the continuous dyeing of textile webs of synthetic fibres or mostly synthetic fibre materials with suitable dyestuffs and dyestuff fixation according to a usual method, wherein the padding operation of the fibrous material with an aqueous dyebath having a relatively high concentration and squeezing off the excess of liquid is effected while pressing from both sides endless webs of an absorbent fibre material (auxiliary webs) onto the material to be dyed.

Process and device for the continuous dyeing of texile webs of synthetic

Process for obtaining multicolor effects on textiles made of polyester fibers and blends thereof with cellulosic fibers, by locally applying an aqueous solution of alkaline agents, either thickened or not and free from oxidizing or reducing agents, onto a dried or partially dehydrated unfixed pad-dyeing produced on said fiber material using a disperse dyestuff of the general formulae hereinafter described, allowing the solution to act on the dyeing, thermosoling the material to fix the dyestuff and finishing it in the usual manner.

Process for obtaining multicolor effects

Process for obtaining irregular tone-in-tone effects, shadow effects or multi-color effects on polyester fibers and blends thereof by padding polyester fiber-containing warps with sizing liquors which contain in addition to sizing agents alkali-susceptible disperse dyestuffs, with subsequent drying and waving with weft yarn undyed or dyed in a different kind, without prior fixation, which process comprises binding the piece-goods so obtained to a rope, loosely tying them and spraying them with aqueous solutions of alkalis which are free from oxidizing or reducing chemicals, irregularly and unevenly from outside, thermosoling them after opening the rope to fix the dyestuff and after-treating them.

Process for obtaining irregular shadow dyeings on polyester fibers and

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.

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Sulzbach, Germany

Hans-Peter Maier