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
  • 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
  • D06P3/82—Textiles which contain different kinds of fibres
  • D06P3/8204—Textiles which contain different kinds of fibres fibres of different chemical nature
  • D06P3/828—Textiles which contain different kinds of fibres fibres of different chemical nature mixtures of fibres containing hydroxyl groups
• • 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
  • D06P1/38—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 using reactive dyes

Definitions

• the present invention relates to a process for the uniform dyeing of mixtures of cotton with modal fibers after an exhaust process with reactive dyes.
• regenerated fibers are referred to as modal fibers or specifically as HWM (high wet module fiber).
• Modal fiber is also understood to mean this type of fiber.
• the modal fibers have a higher breaking strength and, when wet, a high modulus and low swelling value.
• the object of the present invention is to develop a process for dyeing mixtures of cotton / modal fibers with reactive dyes, which allows both fibers to be dyed the same shade and the same depth.
• the invention relates to a process for uniformly dyeing a mixture of cotton and HWM modal fibers with one or more reactive dyes by the exhaust process, characterized in that one or more reactive dyes, each with more than one reactive group and with an extract value of over 50 ⁇ colors.
• alkaline fixing reactive dyes with more than one group from the series comprising chlorine and / or fluorine-substituted triazine, quinoxaline, pyrimidine, Phthala- for domestic, pyridazine or pyridazone-reactive groups or from the series of reactive groups of the vinyl sulfone type, including the groups which are precursors of the reactive vinyl sulfone group, such as the ⁇ -sulfatoethylsulfone, ⁇ -chloroethylsulfone, ⁇ -thiosulfatoethylsulfone, the ⁇ -phosphatoethylsulfone group or the like, in question.
• Suitable basic dye bodies of the reactive dyes are, for example, water-soluble azo, disazo, formazan, anthraquinone, dioxazine or phthalocyanine dyes. Water-soluble azo and disazo reactive dyes are preferably used.
• the inventive method using a reactive dye in addition to the bireactive group of formula I or II additional li ch a reactive group of the formula III comprising, where the radicals X, Y, R, R ', A and M have the meaning given above.
• the reactive dyes required for the dyeing process according to the invention can be prepared by known or analogous to conventional processes.
• the reactive group of formula I can generally by reacting an organic dye which carries an amino group with 2,4,6-trichloro-s-triazine or 2,4,6-trifluoro-s-triazine in aqueous solution Elimination of hydrogen halide and subsequent reaction with an amine of the formula RNH-AS0 2 Y, in which R, A and Y has the meaning given above, are obtained with elimination of hydrogen halide under reaction conditions known per se.
• the reactive group of the formula II is introduced, for example, analogously to the process mentioned above, but instead of the amine mentioned, the corresponding amine of the formula HN-C 6 H 3 R'-NR-C 6 H 3 N0 2 -S0 2 Y occurs.
• the reactive group of the formula III is introduced, for example, in the manner customary for fiber-reactive groups of the vinylsulfone series via the steps of aromatic sulfochloride, sulfinic acid and ⁇ -hydroxyethyl sulfone. This introduction can usually already take place in the case of an intermediate product in the synthesis of parabens.
• the reactive dyes mentioned above contain reactive groups which require alkaline conditions, in particular approximately pH 10 to 12, for fixing at a temperature between room temperature and 100 ° C.
• Alkali such as sodium carbonate, sodium hydroxide solution, water glass or trisodium phosphate, in particular sodium carbonate and / or sodium bicarbonate, are therefore added to the dyeing liquor.
• the dye liquor can also contain conventional dyeing aids, e.g. a salt, such as sodium sulfate or sodium chloride, to increase the fixing yield and oxidizing agents against the reducing action of the cellulose fiber, such as 3-nitrobenzenesulfonic acid sodium salt.
• the dyeing process according to the invention is generally suitable for exhaust processes according to the so-called “all-in Method "or the” preliminary method ", preferably the” all-in method ".
• dye, salt, alkali and, if necessary, a textile additive are added to the dyeing machine loaded with the textile at a low temperature (approx. 20-30 ° C), then the specified dyeing temperature is heated and dyed.
• the textile material is first introduced with the dissolved alkali and salt at room temperature, then loaded with the dye and finally heated and dyed to the intended dyeing temperature.
• the dyed material After dyeing, the dyed material is carefully rinsed with water. It is expedient to neutralize the dyed goods with an organic or inorganic acid before drying and to wash out any residues of unfixed dye with the aid of a detergent.
• the dye liquor is generally heated to a temperature between 40 and 100 ° C, preferably to 50 to 70 ° C, and this temperature is maintained until the end of the dyeing.
• the liquor ratio used corresponds to that customary for the respective dyeing machine in the case of exhaust processes and is approximately between 1: 3 and 1:20.
• level dyeings of yarn, piece goods or loose material made of cotton / HWM - fiber mixtures with reactive dyes can be achieved in comparison with conventional pull-out methods.
• Another advantage of the method according to the invention is that the dyeings can be carried out using the dyeing machines customary for conventional extraction processes; additional devices are not required.
• the quality of the cotton in the fiber blend can influence the quality of the dyeing in individual cases.
• different quality cotton for example combed, carded, unmercerized or mercerized cotton fiber, can be combined with the modal fiber and dyed evenly.
• the fiber mixture can also be mercerized or leached before dyeing.
• a fiber mixture of combed cotton and modal fiber is preferably used and the fiber mixture is boiled off alkaline before dyeing.
• the liquor ratios denote the ratio of the weight of the textile material in grams to the amount of water used for the liquor in liters.
• the bath is ordered in a liquor ratio of 1:15 at 20 ° C. with 0.8% of the dye of the formula (3) and 1% of the dye of the formula (1) from Example 1 and 2% of the dye of the formula (2) from Example 2.
• Dyeing analogously to Example 1 with 2% of the dye of the formula (4) will get a good tone-on-tone coloring with a yellow-red shade.
• Example 2 a dyeing similar to Example 1, but with 2% of the dye of the formula (6) results in a good tone-on-tone muted blue color.
• the dye of the formula (7) gives in a process analogous to Example 1 a good tone-on-tone coloring with the shade of navy blue.

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

Applications Claiming Priority (2)

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Cited By (4)

Citations (3)

• 1985
  • 1985-08-05 DE DE19853528049 patent/DE3528049A1/de not_active Withdrawn
• 1986
  • 1986-07-23 EP EP86110099A patent/EP0211328A3/fr not_active Withdrawn
  • 1986-08-01 PT PT8312486A patent/PT83124B/pt not_active IP Right Cessation

Patent Citations (3)

Non-Patent Citations (3)

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