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
  • D06P5/00—Other features in dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form
  • D06P5/15—Locally discharging the dyes
  • D06P5/155—Locally discharging the dyes with reductants
• • 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
  • D06P1/44—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 insoluble pigments or auxiliary substances, e.g. binders
  • D06P1/64—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 insoluble pigments or auxiliary substances, e.g. binders using compositions containing low-molecular-weight organic compounds without sulfate or sulfonate groups
  • D06P1/642—Compounds containing nitrogen
  • D06P1/649—Compounds containing carbonamide, thiocarbonamide or guanyl groups
  • D06P1/6491—(Thio)urea or (cyclic) derivatives

Definitions

• the present invention relates to a composition for the discharge printing of textile materials, more particularly polyester, triacetate, acetate and a mixture of said textile materials with natural fibres
• Discharge printing is widely adapted for applying colored patterns on textile materials, whereby a first dye is applied to a layer of textile material followed, on this first dye, by a composition that contains a . substance which breaks down the first dye present.
• a composition is worked which only contains the chemical substance which decomposes the first dye, white or uncoloured parts are obtained on the textile material.
• the unprinted composition with the discharging agent contains not only the discharging agent but also additionally a dye that is proof against the discharging agent, another second colour is obtained at the place where the composition is applied.
• the production process of discharge printing of textile materials is achieved by a so-called two-stage method and proceeds as follows.
• the dischargeable base c lours are dyed, sized or preprinted and then dried, after which the textile material is printed with the aid of a rotary, screen, roller or litho printing machine while applying the compostition containing a discharging agent which may additionally contain dyes which are proof against the agent. The whole is then dried, fixed and further treated.
• stannous II chloride as discharging agent, but other metal compounds may also very easily be used, such as e.g. zinc formaldehydesulfoxylate.
• the concentration of the discharging compound to be wsed is relatively high (100 g per kg of discharging agent- containing composition or more) owing to the lack of the mechanical effect (cover print) and the hydrophobic nature of artificial fibres.
• the two-stage method as applied has the disadvantage; in particular, that a high percentage of waste occurs, which is a consequence of the fact that the process is difficult to check and when the first dye applied is dried, certain parts may be fixed so that the discharge print fails when the composition containing the discharging agent is printed on the first dye. Furthermore, the opportunities for design and artistic work are restricted since the print with the compostion containing the discharging agent and the first dye cannot be printed to match in relation to each other, while, finally, this process can virtually be applied only on thin polyester materials.
• composition containing the first dye and a discharging compound can be printed in relation to each other so that the opportunities for design and artistic work are much greater. In particular, this process allows designs hitherto impossible to be printed onto textile materials.
• a multi-coloured design can be obtained by making use of masks both in the stencils for the first colour and the stencils for applying the compound containing the discharging agent, which may contain a second colour which is proof against the discharging compound.
• compositions for discharge printing textile materials which does not coagulate with the composition and a discharging agent, characterized in that the composition contains as discharging agent, at least one organic composition exerting a reducing effect on organic dyes.
• the composition may effectively include an organic compound exerting a reducing effect with the formula R 1 R 2 C - X or R 1 R 2 C - XH where X is a sulphur or selenium atom, the group R 1 an amino group whether substituted or not and the group R 2 consists of an amino group if there is a double bond between the carbon atom and the X atom or consists of an imino group if there is no double bond between the carbon atom and the X atom.
• the composition preferably contains an additional discharging agent in the form of a salt of a metal of the second to fourth groups of the periodic system. However, this is unnecessary if suitable recipes are applied.
• composition may with particular advantage contain as a discharging agent a halogen compound of a bivalent metal, in particular zinc chloride, and yet more advantageously a halogen compound of a quadrivalent metal, in particular stannium, which stannium compound is applied in the form of stannous II chloride.
• the thickeners applied in the composition according to the invention may effectively consist of cellulose or starch derivatives thickening with water.
• Other solvents can also be included in the composition such as e.g. benzine, in which case semi-emulsions are obtained.
• a composition may effectively be used for printing which contains 0,1 to 4% of a metal salt, more particularly 0,1 to 2% and 0,5 to 10% organic discharging agent, still more particularly 1 to 5%_and more effectively 0,5 to 1% of a metal salt, preferably stannous II chloride and/or 0,5 to 5% thiourea.
• composition according to the invention is particularly used for rotation film-printing of textile materials containing synthetic and natural fibers, particularly cellulose fibers (cotton) and polyester.
• Discharging composition for e.g. dispersed dyes
• 360 g of thickener (12% solution) is mixed with 40 g-of emulsifier (12,5% solution), 16 g of sodium acetate and 2 g of citric acid and 48 g of thiourea.
• Example I The composition described in Example I is prepared but without 20 - 40 g stannous II chloride. Instead of stannous II chloride 30 g of "Solutionsalz" or an identical product and 30 g of Lyogene V or an identical product is added. It is filled up to 1000 g with water.
• composition described in examples I or II is taken but the quantity of citric acid is increased to 50 g and 80 g of polyethyleneglycol (specific weight 300) is also added, after which discharging on to polyester/cotton is possible.
• an acid pigment cover printing paste is taken, to which is added 20 g of sodium acetate, 20 g of fixation agent, 50 g of tylose MH 300 (7° solution), 50 g of citric acid and 50 g of thiourea.
• a certain quantity of discharge-resistant pigment dye and 20 - 40 g of stannous II chloride (depending on the properties and dye concentrations present of dischargeable dyes or dyes to be discharged) is further added to this composition. It is filled up to 1000 g with water.
• Discharge composition suitable for pigment dyes
• Example IV The composition described in Example IV is taken but without 20 - 40 g of stannous II chloride and, instead, the products named in Example II are added.
• pastes as described in one of the examples I to V is applied to the textile material to be printed (50% cotton fibre and 50% polyester fibre) and a print overlayer is applied to this of a known printing paste with dischargeable dyes.
• Both printing pastes are printed wet on wet in a single stage with the aid of a printing machine.
• the cloth is then dried, fixed at e.g. a temperature of 170°C within a period of e.g. 10 minutes, after which the textile material is further treated.
• the printing paste according to the invention be first applied to the textile material and then the paste with dischargeable dye, as this produces optimum results.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Coloring (AREA)
• Processes Of Treating Macromolecular Substances (AREA)
• Polyesters Or Polycarbonates (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=19835643

Family Applications (1)

Country Status (5)

Cited By (2)

Citations (11)

• 1980
  • 1980-07-18 NL NL8004160A patent/NL8004160A/nl not_active Application Discontinuation
• 1981
  • 1981-07-17 JP JP56110943A patent/JPS57101086A/ja active Pending
  • 1981-07-20 EP EP81200822A patent/EP0044601B1/fr not_active Expired
  • 1981-07-20 AT AT81200822T patent/ATE20100T1/de not_active IP Right Cessation
  • 1981-07-20 DE DE8181200822T patent/DE3174709D1/de not_active Expired

Patent Citations (11)

Non-Patent Citations (2)

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