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
  • D06P5/30—Ink jet printing
• • 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
  • D06P5/001—Special chemical aspects of printing textile materials

Definitions

• the present invention concerns a composition for treating fibrous materials, in particular for the printing thereof.
• the invention concerns a composition for:
• urea results in a very high pollutant load in the waste water due to its low biodegradability.
• Said low biodegradability is due to the hydrolysis reaction of the urea which occurs in a first step with the formation of ammonium cyanate; in a second step, the ammonium cyanate decomposes into ammonia and carbonic acid. Said reaction is far to the left, namely towards the first step, and this results in having persistent quantities of urea and ammonium cyanate with consequent high nitrogen load and presence of quaternary ammonium which is toxic for aquatic organisms.
• ECHA datum for biodegradability rate of urea 15.5% after 28 days.
• the object of the present invention is therefore to propose a composition that solves the above-mentioned problem and provides an alternative to urea and to its intrinsic properties for printing textile through both silk screen printing processes, such as rotary or flat screen printing, and inkjet digital printing, which has the following characteristics:
• a further object of the invention is to provide a composition that can be used in textile print through both silk screen printing, such as rotary or flat screen printing, and inkjet digital printing, with all classes of reactive dyes and with all classes of acid dyes (which are the most commonly used on the market), and with other categories of dyes requiring the use of urea.
• composition for printing fibrous materials both rotary or flat screen printing and inkjet digital printing, according to claim 1.
• the composition for use in textile print through both silk screen printing, such as rotary or flat screen printing, and inkjet digital printing comprises at least one hydrotropic substance which is not urea or a derivative thereof.
• This provides a composition with low environmental impact, since by eliminating the use of urea, the behaviour resulting from hydrolysis of the urea is avoided, namely persistence in the waste water of undissociated urea and ammonium cyanate, relative quaternized ammonium and high nitrogen load.
• Hydrotropic substances that can be used in the present invention are benzoic acid, brompheniramine maleate, chlorpheniramine maleate, nicotinamide and derivatives thereof, nipecotamide, N-dimethylacetamide, N-methyl-nicotinamide, N,N-dimethyl-nicotinamide, m-hydroxybenzoic acid, p-hydroxybenzoic acid, pheniramine maleate, pyrogallol, resorcinol, penicillin potassium salt, salicylic acid, sodium hydroxybenzoate, sodium ascorbate, sodium benzoate, sodium gentisate, sodium glycinate, sodium salicylate, ibuprofen sodium salt, sodium m-hydroxybenzoate, sodium p-hydroxybenzoate, 4-sulfonic calix[n]arenes, cumene sulphonate, alkylbenzenesulphonates, butyl monoglycol sulphate, picolinamide, isonicotinamide,
• the hydrotropic substance is selected between cumene sulphonate, xylene sulphonate and nicotinamide.
• these compounds have a high biodegradability, 99.8%, 87% and 95% respectively after 28 days, and are in fact considered readily biodegradable.
• the cumene sulphonate and the xylene sulphonate have the advantage of being inexpensive. Nicotinamide has the advantage of having another function in the composition, which will be described below.
• the mechanisms responsible for the hydrotropic solubilization are a function of the nature of the substance to be solubilized, and therefore is selective. In view of this selectivity, it is particularly advantageous for the composition to comprise a mixture of two or more hydrotropic substances.
• the composition also comprises a hygroscopic substance, preferably chosen from ⁇ -caprolactam and hygroscopic salts, or a mixture thereof.
• a hygroscopic substance preferably chosen from ⁇ -caprolactam and hygroscopic salts, or a mixture thereof.
• the ⁇ -caprolactam is particularly preferable since, in addition to its high biodegradability (96% after 28 days), it also has hydrotrope properties.
• the ⁇ -caprolactam has a great hygroscopic capacity at temperatures typically ranging between 0 and 40°C, while the hygroscopic salts have a great hygroscopic capacity at higher temperatures, typically between 40 and 150°C. It is therefore particularly advantageous for the composition to comprise a mixture of ⁇ -caprolactam with at least one hygroscopic salt, so as to have a high hygroscopic activity over a wide temperature range.
• the composition according to the invention independently of the presence of the hygroscopic substance, also comprises a substance that swells the fibres; said substance is selected from keratolytic substances, in the case of wool, and cellulolytic substances, in the case of cellulose fibres.
• Salicylic acid and sodium salicylate which also have hydrotrope properties, are particularly preferred.
• Salicylic acid also has excellent biodegradability, 94% in 28 days.
• DMSO dimethyl sulfoxide
• DMSO also has the advantage of having excellent solvating properties (synergic action with the hydrotropes), in addition to not being toxic and being resistant to high temperatures, typically 150°C.
• the composition also comprises an aminizing substance, preferably chosen from nicotinamide and nicotinic acid.
• the aminizing substance is useful if a monoreactive monochlorotriazine reactive dye is used for printing fibrous material.
• the aminizing substance allows hydrolysis of the monoreactive monochlorotriazine reactive dyes to be directed towards the formation of an amine derivative instead of the hydroxytriazine normally obtained.
• the amine derivative has less affinity with the fibre than the hydroxytriazine, and therefore improves dye wash-off. This improvement in dye wash-off means that the quantity of water to be used for washing the printed textile substrate can be reduced by at least 50%.
• composition according to the present invention can be used in textile print through both silk screen printing, such as rotary or flat screen printing, and inkjet digital printing.
• the composition can also be used with all classes of reactive dyes and all classes of acid dyes, extendible to the other categories of dyes requiring the use of urea.
• it is extendible (given its intrinsic properties) also to those printing processes in which urea is not normally used (as with disperse dyes, pigments and indanthrene), with reference also to non-printing application processes that require concentrated impregnation baths (like pad-steam and pad-batch) where the solubilization and permeability of the latter play an important role.
• compositions or parts of the composition can be inserted in the inkjet printing inks, making the use thereof advantageous to reduce and/or eliminate the use of solubilizing substances present in formulation of the inks. Furthermore, given the capacity of the composition to lower the electrical conductivity (a necessary condition for the functioning and life of the print head), glycols can be eliminated in the formulations of the inks.
• the hydrotropic substances are present in the composition at a concentration ranging from 0.1 M to 2 M, preferably from 0.2 M to 1 M, even more preferably from 0.4 M to 0.8 M.
• concentrations of hydrotropic substances provide a good compromise between the solubility of the components to be solubilized (the dyes) and the permeability of the same in the substrate (the fibrous materials).
• an increase in the solubility of the substance to be carried can cause a reduction in the permeability thereof, especially in the presence of a chemical/physical system in which the substrate shows a hydrophobic or partially hydrophobic character.
• solubilization varies with the concentration of the hydrotropes.
• the increase in solubility is linear above a minimum hydrotrope concentration, and said linearity exists up to a maximum concentration of the hydrotrope, beyond which there is no further increase in solubilization.
• the hydrotropic effect is prevalent in the majority of cases.
• the mode of use of the composition according to the invention varies according to the type of printing in which it is used.
• the composition is applied on the textile substrate (pre-treatment) and the textile substrate is then printed with the printing inks.
• the printing ink can be formulated by partially integrating the components of the composition therein and subsequently proceeding with the printing.
• the composition is used to print a cellulose textile substrate with reactive dyes.
• the solution comprises, as hydrotropic substance, cumene sulphonate or xylene sulphonate or nicotinamide. It is possible to have a mixture of cumene sulphonate or xylene sulphonate with the nicotinamide.
• ⁇ -caprolactam as hygroscopic substance
• dimethyl sulfoxide as sweller of the cellulose
• Printing can be carried out by means of traditional printing or digital (inkjet) printing, and fixation can be obtained by means of vaporization or thermofixing.
• the composition is used to print a proteic fibrous material, such as silk or wool, with reactive dyes.
• the solution comprises, as hydrotropic substance, cumene sulphonate or xylene sulphonate or nicotinamide. It is possible to have a mixture of cumene sulphonate or xylene sulphonate with the nicotinamide.
• ⁇ -caprolactam as hygroscopic substance
• sodium salicylate or salicylic acid as sweller of the proteic fibre
• the printing can be carried out by traditional printing or digital (inkjet) printing, and fixation can be obtained by vaporization or thermofixing.
• the composition is used to print a proteic fibrous material, such as silk or wool, with acid dyes.
• the solution comprises, as hydrotropic substance, cumene sulphonate or xylene sulphonate or nicotinamide. It is possible to have a mixture of cumene sulphonate or xylene sulphonate with the nicotinamide.
• ⁇ -caprolactam as hygroscopic substance
• sodium salicylate or salicylic acid as sweller of the proteic fibre
• the printing can be carried out by traditional printing or digital (for example inkjet) printing, and fixation is obtained by vaporization.
• composition is used to print an elastan fibrous material with acid dyes.
• the solution comprises, as hydrotropic substance, cumene sulphonate or xylene sulphonate or nicotinamide. It is possible to have a mixture of cumene sulphonate or xylene sulphonate with the nicotinamide.
• ⁇ -caprolactam as hygroscopic substance, can be added to the composition.
• the printing can be carried out by traditional printing or digital (for example inkjet) printing, and fixation can be obtained by vaporization.
• composition can be extended to the other categories of dyes requiring the use of urea. It can also be extended (given its intrinsic properties) to classes of dyes such as disperse dyes, pigments and indanthrene used in printing processes where urea is not normally necessary. A further extension also refers to non-printing application processes that require concentrated impregnation baths (like pad-steam and pad-batch) where the solubilization and permeability of the dyes play an important role.
• the intention of the present application is to protect the composition in any overall or partial form as an alternative and decisive solution to urea and its intrinsic properties with reference to the textile processes requiring the use thereof; in fact, the object of the invention is to provide a composition that can be used in textile printing, both rotary or flat screen printing and inkjet digital printing, with all the classes of reactive and acid dyes (which are the most commonly used on the market).
• composition can be used in any overall or partial form with the extension (given its intrinsic properties) also to printing processes where urea is not normally used (as with disperse dyes, pigments and indanthrene), with reference also to non-printing application processes that require concentrated impregnation baths (like pad-steam and pad-batch) where the solubilization and permeability of the latter play an important role.
• composition in any overall or partial form can be included in the formulation of the printing inks.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Coloring (AREA)
• Inks, Pencil-Leads, Or Crayons (AREA)
• Ink Jet Recording Methods And Recording Media Thereof (AREA)

Priority Applications (2)

Applications Claiming Priority (1)

Publications (1)

Family

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Family Applications After (1)

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Cited By (1)

Citations (3)

Family Cites Families (2)

• 2017
  • 2017-10-23 EP EP17197699.6A patent/EP3473767A1/de not_active Withdrawn
• 2018
  • 2018-10-22 EP EP18201862.2A patent/EP3473768B1/de active Active

Patent Citations (3)

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