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
  • D06P3/02—Material containing basic nitrogen
  • D06P3/04—Material containing basic nitrogen containing amide groups
  • D06P3/24—Polyamides; Polyurethanes
  • D06P3/245—Polyamides; Polyurethanes using metallisable or mordant dyes
• • 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
  • D06P3/58—Material containing hydroxyl groups
  • D06P3/60—Natural or regenerated cellulose
  • D06P3/66—Natural or regenerated cellulose using reactive dyes
  • D06P3/666—Natural or regenerated cellulose using reactive dyes reactive group not directly attached to heterocyclic group
• • 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
  • D06P3/8219—Textiles which contain different kinds of fibres fibres of different chemical nature mixtures of fibres containing hydroxyl and amide groups

Definitions

• the present invention relates to a process for the single-bath dyeing of cellulose and polyamide fiber blends according to a continuous or semi-continuous method of the pad-dyeing technique.
• blended fabrics of native or regenerated cellulose fibers and synthetic polyamide fibers can be dyed or printed continuously according to the thermosol process with disperse and reactive dyestuffs.
• an aqueous composition which contains in addition to disperse and reactive dyestuffs also alkali as well as, optionally, further additives such as cross-linking and thickening agents, is applied to the textile material, then the fabric is dried and submitted to a heat treatment at about 175 220C for 30 to 60 seconds.
• the thermosol operation the polyamide fiber portion of the blended fabric is fixed and is, thus, imparted its optimum technological properties.
• the disperse dyestuff is fixed on the polyamide fiber and the reactive dyestuff on the cellulose fiber.
• This process is very expensive because of the dyestuffs used; the fastness properties, especially those as to wet processing of the dyeings are not satisfactory in many cases.
• blends of cellulose fibers and synthetic polyamide fibers can be dyed with reactive dyestuffs and non-reactive metal complex dyestuffs according to a fully or semicontinuous single-bath method of the pad-dyeing techwhen applying to these fibrous materials aqueous padding liquors which contain alkaline agents besides combinations of the above-mentioned dyestuffs, and then optionally after intermediate drying, exposing the material thus treated in the alkaline medium to the action of heat or allowing it to dwell at room temperature or at slightly elevated temperature for the fixation of the dyestuffs.
• This process allows combinations of one or several reactive dyestuffs and of one or several metal complex dyestuffs to be simultaneously fixed on the fiber blends,
• the reactive dyestuff substantially dyeing the cellulose 5 fiber portion of the material and the metal complex dyestuff and, as the case may be, further proportions of the reactive dyestuff, dyeing the polymide component.
• metal complex dyestuffs may be fixed on polyamides especially from an alkaline medium by dwelling at room temperature since the pad dwell process generally does not allow to obtain reproducible and level dyeings with the dyestuffs otherwise suitable for polyamide fibers, especially with acid and disperse dyestuffs, at room temperature.
• the textile material is impregnated on a padding machine at C to C with an aqueous padding liquor containing the dissolved reactive dyestuff, the dissolved or dispersed metal com.
• the fibrous material can be submitted in moist state, immediately after having been 40 padded with the dyestuff preparation, to a steam process of from 30 to 180 seconds, preferably from 30 to seconds, at a temperature within the range of from to 108C, preferably of from 103 to 105C. (onebath pad wet-steam process).
• the pad-dyeings can also be steamed, after an intermediate drying step at relatively low temperatures up to C, for 5 to 15 minutes, preferably for 7 to 10 minutes, at a temperature from 100 to 108C, preferably at from 100 to 105C (one-bath pad-steam process), or they can be thermosoled on a tenter frame or a sieve drum drier by forcing through the goods dry hot air by suction or by contact heating at temperatures within the range of from 190 to 220C within from 10 to 60 seconds, preferably for 60 seconds at 195C (heat fixation process).
• intermediate drying after the padding process may, however, be omitted if, by treating the padded material for example, on the hot-flue, for 1 to 6 minutes, preferably for 90 to seconds, at temperatures within the range of from 170C, preferably at about C, together with the drying of the goods, fixation of the dyestuff is effected (one-bath pad drying process).
• fixation of the dyestuff is effected (one-bath pad drying process).
• the favourable conditions offered by the single-bath dyeing method are maintained when the blended fabrics padded simultaneously with the dyestuff combinations and with alkali are rolled onto a beam and the fibrous material is allowed to dwell in moist state at room temperature or at slightly elevated temperature within the range of from to 60C for 2 to 24 hours, preferably for 8 to l4'hours (one-bath'pad-batch process or short-time pad-batch process).
• This semi-continuous dyeing technique is characterized by a high degree of utility because of the energy-saved and expensive aggregates for intermediate drying and fixing are not necessary.
• the material After dyeing, the material is rinsed, soaped and finished in usual manner.
• the metal complex dyestuff causes no or only little soiling of the cellulose portion.
• the aqueous baths are not neutralized with acetic acid, since otherwise part of the reactive dyestuff is fixed on the polyamide fiber portion of the material which causes a change in shade.
• the process of the invention for dyeing textile materials which consist of cellulose and polyamide fiber blends has the advantage, in comparison with the single-bath dyeing technique generally used for this purpose, that considerably improved fastness properties can be obtained, especially with respect to wet processing.
• the fastness to perspiration of the dyeings was given the mark 5, a result which could not be obtained by other. methods, especially by the singlebath dyeing technique mentioned as prior art.
• the twobath processes for dyeing the said fiber blends are surpassedby the novel process in that the working meth ods are simplified and the costs are reduced.
• such reactive dyestuffs which contain, as the reactive component, at least one vinylsulfone group or at least one group capable of fonning the vinylsulfone group under the action of the alkaline agents during the dyeing process.
• the said radicals are bound to the dyestuff molecule directly or via a bridge member, especially NH or NR- (R lower alkyl).
• the groupings which can be converted into the reactive vinylsulfone group by alkaline substances there may be mentioned, for example, the B-sulfatoethyl-sulfone group, the ,8-thiosulfatoethyl-sulfone group, the fi-phosphatoethyl-sulfone group, the B-chloroethyl-sulfone group, the B-dialkylaminoethyl-sulfone group as well as the corresponding sulfonylamino groups, especially the ethyionylamino radical.
• the B-sulfatoethyl-sulfone group the ,8-thiosulfatoethyl-sulfone group
• the fi-phosphatoethyl-sulfone group the B-chloroethyl-sulfone group
• the B-dialkylaminoethyl-sulfone group as well as the corresponding sul
• All the otherknown reactive dyestuffs especially those which contain, as the reactive group, at least one B-(2,2,3,3-tetrafluorocyclobutyl)- acrylaminoor B-( 2,2,3 ,3-tetrafluoro-4-alkylcyclobutyl)-acrylamino group can be used for the novel dyeing method.
• these dyestuffs there are especially suitable those of the anthra quinone, azo and phthalocyanine dyestuff series, in which case the azo and phthalocyanine dyestuffs may be metal-free or metallized.
• non-reactive metal complex dyestuffs there are used in the process of this invention 1:2-chromium or cobalt complex compound of azo dyestuffs, especially monoazo dyestuffs, i.e. compounds in which 2 molecules of one azo dyestuff or 1 molecule each of two azo dyestuffs different from one another are bound to a chromium or cobalt atom in complex-bound form.
• the complex may contain, for example, one disazo dyestuff and one monoazo dyestuff or, preferably, two identical or different monoazo dyestuff molecules.
• F urthermore there may be used water-soluble, me tallized azo dyestuffs which contain per dyestuff molecule only one metal atom in complex bound form lzl-metal complex compounds), especially copper, and also chromium or cobalt.
• These azo dyestuffs contain as groups forming the metal complex linkage preferably o,o-dihydroxy azo groupings.
• the padding liquors there may be used in the padding liquors, on principle, all inorganic substances having an alkaline effect, such as sodium carbonate, sodium bicarbonate, trisodium phosphate, disodium phosphate, sodium hydroxide, sodium silicates, the corresponding potassium compounds or mixtures of these alkalis in amounts of from 3 to 30 g, preferably from 5 to 20 g, per liter of padding liq'uor, said alkali content depending, on the one hand, on the dyestuff amounts used and, on the other hand, on the efficiency of the energy supplied for fixation.
• the pH-value of the dyebath generally is within the range of from 8 to 13.
• the padding liquors may advantageously contain electrolytes, especially crystallized sodium sulfate or purified sodium chloride in amounts ranging from 10 to 40 g, preferably of about 30 g, per liter of padding liquor.
• wetting and thickening agents may also be added to the dyebaths used, a capillary-active mixture containing branched aliphatic carboxylic acid esters, optionally partially saponified phosphoric acid esters of aliphatic alcohols of medium molecular weight, small amounts of fatty acids or soaps and as wetting agent known higher oxalkylates of aliphatic or aliphatic-aromatic' sulfonic acids being .especially recommended, since it advantageously influences the intensity and levelness of shade.
• alkali metal salts of the m-nitro-benzenesulfonic acid and the polyalkylene glycols preferably polyethylene glycols, having an average molecular weight of about 400 to 800.
• the above-mentioned auxiliaries are used in amounts within the range of from 5 to 20 g/l, preferably 10 to 15 g/l of the dyeing preparation.
• the textile material to be dyed in accordance with the invention which consists of blends of native or regenerated cellulose fiber and synthetic polyamides in a ratio of from 50 50 to 15 has the working stage of a flat-surface textile structure, for example a woven or knitted fabric.
• EXAMPLE 1 16 g of the reactive dyestuff of formula were dissolved in the two to four fold amount of hot water and this solution was cooled to about 50C by adding about the same amount of cold water.
• Table 1 indicates further dyestuff combinations which may be used for the dyeing of blended fabrics of cellulose and polyamide fibers according to the method described in Example 1, the dyestuff amounts to be used in each case and the shades obtainmade up to a volume of 1 liter by adding cold water. 25 able on the fiber blend components:
• N NfiC-CH3 HOC N CH 1:2-chromium complex compound.
• I'lOaS-O-CHPCHr-S O 2- mas 2 g of m-nitrobenzenesulfonic acid (sodium salt) and g of crystallized sodium sulfate, was poured into the solution of the reactive dyestuff and the mixture was made up to a volume of 1 liter by adding cold water. Furthermore, 16 cc. of sodium hydroxide solution of 38Be were added to the dyebath thus prepared.
• N N(HI -CH?--C H H 0-0 N I N s 03H OZCIIZ CIIQO"-SO3TI S OrlNa F I) N; -N-C-CC1Ia J n o-N N l 0 O H ⁇ N/ 1:2-chromium complex compound.
• l were dissolved in the two to four fold amount of hot Y 1 water and this solution was cooled to about 50C by adding cold water.
• Another aqueous dyestuff solution o 40 prepared in the same manner using 10 g of the 1:2- were flooded with about 200 cc. of boiling water and cobalt complex compound of the dyestuff of formula dissolved while stirring thoroughly. After having added 500 cc. of cold water 10 g of m-nitrobenzensulfonic acid (sodium salt), 10 g of crystallized sodium sulfate and 20 g of calcined sodium carbonate were stirred in this solution whereupon the dyebath so prepared was & made up to a volume of 1 liter by adding cold water.
• sodium salt sodium salt
• a blended fabric of cotton and synthetic polyamide fibers (ratio 50) was impregnated at 20 to 25C, freed from the excess liquid 50 by squeezing and then dried at 140C for 90 to 120 sec- (31 onds on a hotflue. Subsequently, the material thus treated was rinsed in the way indicated in Example 1, soaped with a non-ionic detergent and finished.
• a dye-' and 20 g of a polyethylene glycol having an average ing was obtained in which the cotton component of the molecular weight of about 400, was poured into the sofiber blend was dyed in scarlet red shade and the polylution of the reactive dyestutT and the mixture was amide fiber component in dark blue shade. made up to a bath volume of 1 liter by adding cold water. Furthermore, 10 g of sodium bicarbonate were EXAMPLE added to the dyebath so prepared.
• aqueous solution was prepared from 35 g of the With this padding liquor, ablended fabric of equal reactive dyestuff of the formula proportions of cotton and of synthetic polyamide fibers was impregnated at to C on the padding machine and squeezed, then dried at 110C and therrnosoled at 190C for to seconds by means of hot air on a tenter frame. Subsequently, the fabric thus dyed was rinsed with neutral, cold water and then with hot water at about C and soaped at room temperature for 5 minutes with a solution containing 1 g of the condensation product of oleic acid and N-methyl tau rine (as sodium salt) per liter of water. After rinsing and drying had been repeated a dyeing was obtained 10 TABLE 3 Example Dyestufi combination OH HCI) 1:2'cobalt complex compound.
• Polyamide fiber anthracite.
• Polyamlde fiber anthracite.
• v 21 Cellulose fiber turquoise blue.
• NiPc niekel phthalocyanine
• NZM W N N l i (Jl lzl-ehromium eomplex compound (mixed chroming). 21 r ro v r ro 1s Cellulose fiber: bordo.
• N N y ( ⁇ JHa / ⁇ NS 02CH2CHz-0S 03K 1 S 03K I S 03K O -NH; 7 Polyamide fiber: red violet.
• a process for the single-bath dyeing of a fibrous blend of cellulose fibers and synthetic polyamide fibers with a reactive dyestuff and a non-reactive metal complex dyestuff in a continuous orsemi-continuous procedure of the pad-dyeing technique which comprises applying to a fibrous blend of cellulose fibers and polyamide fibers an aqueous alkaline padding liquor containing a reactive dyestuff for said cellulose fibers and a non-reactive metal complex dyestuff for said polyamide fibers, padding the fibrous blend thus treated with said padding liquor, and then fixing said reactive dyestuff on said cellulose fibers and said non-reactive metal complex dyestuff on said polyamide fibers by al lowing said fibrous blend to dwell between 2 and 24 hours in moist condition at about room temperature or at slightly elevated temperature.
• said aqueous alkaline padding liquor contains, as a capillaryactive mixture, a branched-chain aliphatic carboxylic ous alkaline padding liquor contains a polyalkylene glycol of average molecular weight of about 400 to about 800 as an auxiliary agent.
• said reactive dyestuff has a vinylsulfone group or a group which forms a vinylsulfone group in alkaline medium.

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• 1972
  • 1972-02-22 CH CH249272D patent/CH249272A4/xx unknown
  • 1972-02-22 CH CH249272A patent/CH554452A/xx unknown
  • 1972-02-23 US US00228756A patent/US3795481A/en not_active Expired - Lifetime
  • 1972-02-23 IT IT7220954Q patent/IT947843B/it active
  • 1972-02-24 FR FR7206243A patent/FR2126379B1/fr not_active Expired
  • 1972-02-25 BE BE779871A patent/BE779871A/xx unknown
  • 1972-02-25 GB GB892872A patent/GB1382102A/en not_active Expired

Patent Citations (5)

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