Hoechst Aktiengesellschaft

Cassella Aktiengesellschaft

Erich Feess

Willy Gronen

Horst Curtius

Hans-Ulrich Von Der Eltz

Walter Birke

Hartmut Springer

Franz Schon

Hasso Hertel

Friedrich Reinhardt

Paul Karacsonyi

Hans-Peter Maier

Hans H Steuernagel

Sienling Ong

Siegfried Glander

Konrad Mix

Joachim Steinbach

Kurt Roth

Heinz Dethloff

Gunther Trapp

Heinz Fleissner

The textile-printing industry is very interested in bypassing the laborious and expensive production of transfer printing papers, together with the required engraving of rolls. It has been found that this demand can be satisfied by electronically recording and reproducing any motif and transferring to textile material by means of halftone systems. According to the invention, the dyestuffs are continuously transferred by halftone systems from four differently and uniformly colored papers one after the other. To obtain a good picture, 10 to 20 halftone dots per cm are advisable for pressing the paper to the surface of the textile material. Either the halftone dots themselves are heated, or they press the textile material and paper onto a heated surface. The halftone dots are electronically actuated in correspondence with the scanning of the motif. The process can be carried out particularly simply on a flat screen printing machine, because this machine dispenses with the need to perform the color transfer very rapidly from the paper uniformly colored with dyestuff to the PES material.

Process for printing polyester fiber materials by the transfer printing

New phthalocyanine dyestuffs of the formula ##STR1## wherein Phth is a copper phthalocyanine or cobalt phthalocyanine moiety; x is a number from 0 to 3; y is a number from 1 to 4 and the sum of x and y is 4 or less; the thiocyanate group is in the meta or para-position to the amino; and addition products thereof formed with water in the presence of acids; are prepared by converting a phthalocyaninecarboxylic acid into the corresponding acid halide and condensing the acid halide with m- or p-thiocyanoaniline in an inert organic diluent; and the new dyestuffs are for dyeing and printing a material of natural or regenerated cellulose.

Dyestuffs of the phthalocyanine series, their preparation and their use

In order to achieve lighter patterned effects on a background of a deeper color, aqueous printing pastes containing, additionally to thickeners and other conventional printing assistants, assistants which have dissolving properties for the dyestuffs at elevated temperatures and which do not attack the fibers under thermosol conditions, are applied to textile webs which have been dyed in a finished manner with suitable dyestuffs or have only been impregnated therewith, after which the goods treated in this way are subjected to a steaming process or to a dry heat treatment. In accordance with the process it is possible to effect a uniform lightening, 'white discharging' or 'colored discharging' of dyeings, particularly dyeings of synthetic fibers with disperse dyestuffs and also dyeings of natural fibers or mixtures thereof with disperse dyestuffs, vat dyestuffs, leuco esters thereof and developing dyestuffs. Dyestuff-dissolving assistants of the type used are anionic, cationic or nonionic compounds of various structures.

Process for the localized lightening, white discharging or colored

According to two-phase processes multi-color effects are obtained on cellulosic materials, namely conversion effects with reactive and vat dyestuffs on the one hand and discharge resists prints with reactive dyestuffs and, optionally, vat dyestuffs on the other hand, by printing or padding the reactive dyestuff or a mixture of reactive and vat dyestuffs in a weakly acidic medium onto the material, overprinting this material with a neutral paste containing formamidine sulfinic acid as discharging agent and, if desired, a vat dyestuff, drying the print, contacting the material with an aqueous strongly alkaline liquor, steaming it and finishing the article in known manner, depending on the choice of dyestuffs.

Two-phase printing process for preparing conversion articles and

According to two-phase processes multi-color effects are obtained on cellulosic materials, namely conversion effects with reactive and vat dyestuffs on the one hand and discharge resist prints with reactive dyestuffs and, optionally, vat dyestuffs on the other hand, by printing or padding the reactive dyestuff or a mixture of reactive and vat dyestuffs in a weakly acidic medium onto the material, overprinting this material with a neutral paste containing a stable discharging agent of the sulfinic acid series and, if desired, a vat dyestuff, drying the print, contacting the material with an aqueous strongly alkaline liquor, steaming it and finishing the article in known manner, depending on the choice of dyestuffs.

Developing dyes are especially easily produced by using preparations containing molar amounts of diazo or coupling components per weight or volume unit or a multiple or a fraction thereof in simple numerical ratios. Since the diazo component is the free finely dispersed amine these preparations are stable and allow the reaction of stoichiometric amounts. Thus, multicolor effects are feasible which hitherto could not be obtained at all or with difficulties only.

Dyeing preparations and their use for preparing developing dyes

Process for the continuous dyeing of textile webs made from cellulose fibers or wool, or mixtures containing such fibers, with reactive or sulfur dyestuffs in reduced form, or with reactive or acid dyestuffs, which comprises preheating the textile material to temperatures of from 97.degree. to 104.degree. C. by means of IR radiators or microwaves while maintaining a residual moisture corresponding at least to the water retention amount (normal humidity) of the fibers, and subsequently treating it with steam for 10 to 300 seconds without applying additional pressure, in order to fix the dyestuffs.

Process for the continuous dyeing of textile webs pre-heated with

Synthetic polymers having carboxy groups are useful thickeners for printing pastes or pad-dyeing liquors containing disperse dyestuffs for the coloring of cellulose fibers which may be regenerated or their mixtures or mixtures of such fibers with polyester fibers.

Process for pad-dyeing and printing fabrics made of cellulose and/or

Process for printing textile cellulose fiber fabrics with printing pastes containing coupling components dissolved in an alkaline medium, sodium nitrite and diazotizable primary aromatic amines, in which process the amines are used as a solution or in the form of an aqueous fine dispersion with a particle size of less than 0.03 mm and are selected in a manner such that they are paractically non-volatile under at the drying temperatures and show a minimum basicity degree with the pK.sub.a being 2.2 or more, developing the water-insoluble azo dyestuffs on the fiber by diazotizing the amines and coupling the diazonium compound formed with the coupling components following the drying of the printing pastes applied by a treatment of the printed fabrics at room temperature with an aqueous developing bath containing formic acid, and completing the coupling without a previous intermediate drying of the fabric, however, optionally following an air passage, by a short-time steaming with saturated steam.

Process for the printing of cellulose fiber fabrics

Process for printing textile mixed fabrics of polyester and cellulose fibers with printing pastes containing coupling components dissolved in an alkaline medium, sodium nitrite, diazotizable primary aromatic amines and optionally disperse dyestuffs, in which process the amines are used as a solution or in the form of an aqueous fine dispersion with a particle size of less than 0.03 mm and are selected in a manner that they are practically non-volatile at the drying temperatures and exhibit minimum basicity with the pK.sub.a being 2.2 or more, developing the water-insoluble azo dyestuffs on the fiber by diazotizing the amines and coupling the diazonium compounds formed with the coupling components following the drying of the printing pastes applied by a treatment of the printed fabrics at room temperature with an aqueous developing bath containing formic acid, and completing the coupling as well as the fixation of azo dyestuffs formed and of optionally employed disperse dyestuffs on the polyester fiber portion without previous intermediate drying, however, optionally after an air passage, either by steaming with high temperature steam or by a fast steaming with saturated steam and subsequent treatment with dry heat and/or high-temperature steam.

Process for the printing of mixed fabrics of polyester and cellulose

Azo developing dyestuffs are produced by diazotizing on the fiber a mono- to tetramine derived from a metal-containing or metal-free phthalocyanine, the amino group(s) being bound to a phenyl or naphthyl group (which may be substituted) which is linked via a bridge member to the phthalocyanine which may further contain up to 3 optionally substituted sulfon amide groups and up to 3 sulfo groups, and coupling said diazotized amino onto azoic coupling components usual for preparing developing dyestuffs.

Process for the preparation of azo dyestuffs on fiber materials

o-Aminophenol ethers deriving from lower alkylene glycols, lower alkylene polyglycols and the corresponding mono-lower alkyl ethers which may be substituted in the phenyl nucleus by halogen or nitro, are useful as diazo components in the 'all-in' printing process for preparing developing dyes on cellulose. In this process the printing paste contains the alkaline solution of the coupling component, a dispersion of the amine, sodium nitrite and a thickening composition and developing of the dye is brought about with acidic means, followed by or combined with a heat treatment.

Process for printing with developing dyes which employs having ether

A process for the fixation of organic dyestuffs on materials having a fibrous structure had been found, in which an organic dyestuff containing one or several groups of the formula (I) ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 each represent a non-ionic, anionic or cationic substituent, with the exception of a primary or secondary amino group or the salts thereof, is applied in dissolved form onto said materials and subsequently subjected to the action of nitrous acid. The process yields fiber materials on which active substances, such as dyestuffs, brighteners, mothproofing agents, water-repellent agents, etc., are fixed fast; the novel process is especially and advantageously suitable in combination with the ice-color technique.

Process for the fixation of organic dyestuffs on materials having a

Cellulosic material is printed with a paste containing the alkaline solution of a coupler, the dispersion of a diazotable aromatic amine, a nitrite and a thickener and the dyestuff is developed on the fiber by acidic steaming or by adding solutions of organic acids and steaming or drying.

Process for the printing with developing dyes

Device for the uniform application of liquid treating baths in the form of foam onto textile flat materials, consisting essentially of (a) elements for foaming the liquor under pressure, by a pipe-line for the foam linked to (b) a foam distributing and foam applying chamber, and immediately below, but not directly limited therewith, (c) elements for supporting and transporting the textile web in open width of the material.

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Hofheim am Taunus, Germany

Erich Feess