Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
  • D06P1/0032—Determining dye recipes and dyeing parameters; Colour matching or monitoring
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
  • D06P3/02—Material containing basic nitrogen
  • D06P3/04—Material containing basic nitrogen containing amide groups
  • D06P3/14—Wool
  • D06P3/148—Wool using reactive dyes
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S8/00—Bleaching and dyeing; fluid treatment and chemical modification of textiles and fibers
  • Y10S8/916—Natural fiber dyeing
  • Y10S8/917—Wool or silk

Definitions

• the present invention relates to a process for the level dyeing of wool or the wool portion of fiber mixtures using the pull-dyeing technique in a weakly acidic medium with aqueous liquors of reactive dyes.
• the dyeing of wool with reactive dyes is generally known.
• the textile material is treated at pH values between 4 and 6.5 and temperatures between 95 ° and 106 ° C with aqueous solutions of these dyes until the dye bath is exhausted.
• the object set out above is achieved according to the invention in that the reactive dyestuffs and, if appropriate, all other ingredients, but no pull-out liquor containing the acid or acid-donating agents required for fixing the dyestuffs, together with the dyestuff as quickly as possible and in one step to the dyeing temperature in the region heated from 95 ° to 110 ° C, that after reaching the same while maintaining appropriate isothermal conditions for dye fixation, the heated dye bath is then (the) acid - distributed over a longer period of time - and the wool at pH values between 4 and 6.5 colors.
• the metering of the acid over a longer period of time to the dye liquor based on fixing conditions for the dye can be carried out quantitatively both linearly and progressively, but the time at which the bath temperature is kept constant in the course of the acid inflow is included in the total dyeing time and consequently, the latter is not extended in accordance with the procedure.
• the pure dosing time can be from 15 to 60 minutes, with a total dyeing time (including dosing time) from 60 to 90 minutes.
• the same quantity of acid is introduced into the dyebath p ro unit time. This can be done by introducing the acid, usually diluted with water, either discontinuously in the same portions and at the same time intervals, or by continuously flowing it in the same amount per unit of time.
• a progressive dosing of the acidic fixative brings an increasing amount of acid into the dye bath per unit of time as the dosing time progresses, which can also be done manually.
• Newer dosing devices do this type of dosing automatically, so that only the desired slope of the progression according to a given mathematical function, eg linear, ex p o- nentiell or in the manner of a parabolic function, needs to be set.
• the amount of acid to be introduced - like the dyeing time - depends on the desired depth of dyeing. As a rule, it is 1 to 5% acetic acid 60 sig, based on the wool weight.
• wool or appropriately constructed fiber mixtures is understood to mean those in any processing state, that is to say as flakes, sliver, yarn, piece goods or also in the form of finished parts.
• the organic dyes known under this generic term - regardless of the type of their fiber-reactive group - are considered as reactive dyes.
• This class of dyes is referred to in the Color Index, 3rd edition 1971 and supplements 1975 as "CI.
• Reactive Dyes comprises chemical compounds with dye character which are able to form a covalent bond with OH groups and / or NH group-containing fibers . These are predominantly those dyes which contain at least one group which is reactive with hydroxyl or amino groups in the fiber material having a polyamide structure, a precursor therefor or a substituent which is reactive with the above-mentioned constituents of the fiber molecule.
• chromophoric Sy- As the basic body of the chromophoric Sy-. Stems of these organic dyes are particularly suitable those from the series of the azo, anthraquinone and phthalocyanine compounds, it being possible for the azo and phthalocyanine dyes to be both metal-free and metal-containing.
• Reactive groups and precursors which form such reactive groups include, for example, epoxy groups, the ethyleneimide group, the vinyl grouping in the vinylsulfone or acrylic acid radical, also the ⁇ -sulfatoethylsulfone group, the ⁇ -chloroethylsulfone group or the ⁇ -dialkylamino-ethylsulfone group.
• tetrafluorocyclobutyl series for example tetrafluorocyclobutyl acrylic acid
• the reactive substituents in reactive dyes are those that are easily removable and leave an electrophilic residue.
• 1 to 3 halogen atoms on the following ring systems are of interest as substituents: quinoxaline, triazine, pyrimidine, phthalazine, pyridazine and pyridazone.
• Dyes with several identical or different reactive groups can also be used.
• Such reactive dyes of the type defined above often have more than one sulfonic acid group (except in the reactive grouping of the dye) in the molecule, which can be distributed as desired over the chromophore, but are preferably bound to its aromatic radicals.
• the bath temperature is kept constant during the acid addition and for a certain time afterwards. After the intended dyeing time, the dyeing is finished as usual for wool.
• Dyes which are conversion products of sulfonyl reactive dyes with N-methyl taurine, are present in the structure represented by the respective formula after being dissolved correctly.
• the bath has a pH of 6.8.
• the bath loaded with the dye is now brought to circulation and heated to the dyeing temperature of 100 ° C. within 10 minutes.
• the total addition is started 4 4 acetic acid (60%), which corresponds to a liquid volume of 3.2 1.
• This dosing should be carried out in portions, but progressively, in equal quantities.
• the acid is diluted to a volume of 15 l using water and the following amounts of this solution are added after every 7 minutes in accordance with the staggering given below:
• the temperature of the bath is kept constant at 100 ° C.
• the acid introduced has therefore been preheated to about the dyeing temperature.
• the goods are further dyed for a further 30 minutes at the same temperature. Then the extracted liquor, including the dyed wool, is cooled, the latter rinsed with water and finished as usual.
• the desired real and level black dyeing of the yarn is obtained.
• the goods are further dyed at 106 ° C. for 10 minutes, then cooled together with the liquor, rinsed with water and finished as usual for wool.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Coloring (AREA)

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Citations (6)

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• 1985
  • 1985-12-18 DE DE19853544795 patent/DE3544795A1/de not_active Withdrawn
• 1986
  • 1986-12-12 EP EP86117357A patent/EP0228639A3/fr not_active Withdrawn
  • 1986-12-16 US US06/942,246 patent/US4737157A/en not_active Expired - Fee Related
  • 1986-12-17 AU AU66669/86A patent/AU6666986A/en not_active Abandoned

Patent Citations (6)

Non-Patent Citations (1)

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