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 invention relates to a process for printing polyester containing textile materials by applying in one step wet on wet a first composition containing at least a dischargeable dye and a discharge composition containing a compound discharging said dischargeable dye onto a fabric, drying the fabric and fixing the dyes by heating.
• Such a process for printing polyester or polyester/cotton fabrics in one step using a first composition containing a dischargeable dye and urea (thiourea is used for other fabrics) and a discharging composition containing only high amounts of stannous chloride and sodium sulphoxylate formaldehyde as discharging agent is known from GB-A-1.508.855.
• This aim is attained in that the dischargeable dye is discharged by a thiourea or isothiourea compound present in the discharge composition.
• GB-A-1.440.904 discloses a printing process wherein a composition containing at least one dischargeable dye is applied onto fabric of polyester fibres and after dying the polyester material a discharging composition is applied containing 7 parts by weight of stannous chloride and 5 parts by weight of an amine binding hydrochloric acid evolved in the action of stannous chloride.
• This amine may be urea or thiourea.
• the fabric is subjected to a steam treatment with superheated steam at a temperature of 180°C for 10 minutes for fixing the dyes. This process does not provide multicoloured designs of good quality.
• DE-B-1.103.288 also describes a discharge printing process for printing cellulose ester containing fabrics by applying a two steps process, the discharging composition containing 15 parts by weight of sodium sulphoxylate formaldehyde as discharging agent and 10 parts by weight of thiourea. This process does not provide multicoloured design of good quality.
• US-A-2.874.022 discloses the use of a discharging composition containing sodium sulphoxylate formaldehyde and thiourea for discharge printing cellulose acetate in two steps.
• DE-A-2.727.327 and CH-A-612.307 describes a two step discharge printing process for polyester fabric the discharge composition containing 8 to 10% of zinc sulphoxylate formaldehyde and 1 to 3% of thiourea.
• US-A-3.958.287 describes the use of thiourea as a hydrotroping or neutralizing agent in discharging compositions containing stannous chloride as discharging agent, the printing process is a two step process.
• the discharging composition as used in the invention may contain an additional discharging agent preferably 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.
• the composition may contain as such an additional 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 tin, which tin compound is applied in the form of stannous chloride. It is recommended to use at most 5% of such an additional discharging agent.
• the discharge composition may contain at most 4% of a dye discharging metal salt preferably of a halide or a halide of a metal of the second to fourth groups of the periodic system as additional discharge agent besides 0,1 to 10%, preferably 0,1 to 5% of a thiourea or isothiourea compound as discharge agent.
• the metal halide is advantageously zinc or stannous chloride.
• 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% of organic discharging agent, still more particularly 1 to 4% and more effectively 0,5 to 1% of a metal salt, preferably stannous II chloride and 0,5 to 5% thiourea.
• the fabric is subjected to heat treatment at a temperature exceeding 80°C and less than the decomposing temperature of the textile material, preferably to a steam treatment at a temperature of 150 to 180°C.
• the process according to the invention is particularly used for rotation film-printing of textile materials containing synthetic and natural fibres, particularly cellulose fibres (cotton) mixed with polyester.
• a discharge composition for use in the process of the invention contains at most 4% of a dye discharging metal salt preferably of a halide of a halide of a metal of the second to fourth groups of the periodic system as additional discharge agent besides 0,1 to 10%, preferably 0,1 to 5% of a thiourea or isothiourea compound as discharge agent.
• 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, benzene, in which case semi-emulsions are obtained.
• a layer of one of the discharge-resistant printing pastes as described in one of the Examples II to VI 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.
• 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.
• Discharging Composition Suitable for e.g. Dispersed Dyes
• Example II The composition described in Example II 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 II or III 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.
• Example V The composition described in Example V is taken but without 20-40 g of stannous II chloride and, instead, the products named in Example III are added.

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)

Families Citing this family (2)

Family Cites Families (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 DE DE8181200822T patent/DE3174709D1/de not_active Expired
  • 1981-07-20 EP EP81200822A patent/EP0044601B1/en not_active Expired
  • 1981-07-20 AT AT81200822T patent/ATE20100T1/de not_active IP Right Cessation

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