Reactive dyes, production method and application thereof

FIELD: chemistry.

SUBSTANCE: invention relates to reactive metal-complex azo dyes, specifically to reactive dyes of formula where R1 is hydrogen, (R2)5 is a nitro group, X is chlorine, T is a radical of formula , ,

or

,

where (R3)0-2 -0, Z is a vinyl or -CH2-CH2-U, U is a group removable in an alkaline medium, Q - -CH(Hal)-CH2-Hal or -C(Hal)=-CH2, Hal is a halogen, s equals 0 or 1.

EFFECT: disclosed dyes have high resistance to wet processing, especially when dyeing or printing synthetic polyamide fibre materials.

7 cl, 12 ex

 

The present invention relates to novel reactive dyes, method for their production and to their use for dyeing or printing fibrous textile materials.

The practice of dyeing using reactive dyes has recently led to increased requirements to the quality of dyeing and economic efficiency of dyeing. Therefore, there remains a need in the new reactive dyes having improved characteristics, in particular the characteristics of the application.

Now for dyeing requires reactive dyes that have sufficient affinity for the material and at the same time well-laundered if they are not fixed. They should also have good color saturation and high reactivity to lead to well-fixed coloration. Known dyes don't meet all these requirements.

Coloring polyamides in a deep black color can only be carried out by using acid dyes, but this color is unstable to namachivanii at high temperatures. Color deep color, which is also resistant to namachivanii, can only be achieved by using reactive dyes.

In accordance with the present invention are the two which is the development of new improved reactive dyes, intended for dyeing fibrous materials and printing on them having the above improved quality parameters, particularly for the case of the use of dyes for the dyeing of synthetic fiber materials. These new dyes should differ a good fastening and durable binding fiber. It is particularly important that the dyes resulted in staining, which is generally very stable, for example, resistant to light and namachivanii.

Found that the above problems effectively addressed with the help of new dyes described in this invention.

Accordingly, the present invention relates to reactive dyes of the formula

in which

R1denotes hydrogen or unsubstituted or substituted C1-C4alkyl, (R2)sdenotes identical or different substituents selected from the group comprising halogen, a nitro-group, unsubstituted or halogen-substituted C1-C4alkyl, C2-C4alkanolamines,1-C4alkylsulfonyl, carbarnoyl,

sulfamoyl and alphagroup,

Me denotes chromium, cobalt or iron,

X denotes chlorine,

T denotes reactive with respect to the fiber radical of the formula

,

p> ,

,

or

(R3)0-2denotes from 0 to 2 identical or different substituents selected from the group comprising From1-C4alkyl, C1-C4alkoxygroup and alphagroup,

Z denotes vinyl or a radical-CH2-CH2-U and U denotes a group which can be removed in an alkaline medium,

Q denotes a group-CH(Hal)-CH2-Hal or -- C(l)=CH2,

Hal denotes halogen,

s is 0,1,2 or 3 and

m, n, r and q are all independently from each other 0 or 1.

In the radical of formula (2C) Me denotes a methyl radical and Et t denotes the ethyl radical. In addition to these hydrogen radicals suitable for use as substituents of the nitrogen atom.

As With1-C4the alkyl for R1and R3in consideration, independently of one another are, for example, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, tert-butyl and isobutyl, preferably methyl and ethyl, and more preferably methyl. For R1these alkyl radicals are unsubstituted or substituted with, for example, hydroxy-group, sulfopropyl, sulfate groups, cyanopropyl, carboxypropyl,1-C4alkoxygroup or phenyl which, preferably the hydroxy-group, sulfate group, With1-C4alkoxygroup or phenyl. For R1preferred are the corresponding unsubstituted radicals.

As With1-C4the alkyl for R2are included in the review, for example, methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl and isobutyl, preferably methyl or ethyl, and more preferably methyl. These alkyl radicals are unsubstituted or mono - or polyamideimide halogen, for example fluorine, chlorine or bromine, preferably fluorine or chlorine.

As With1-C4alkoxygroup for R3are included in the review, for example, a methoxy group, ethoxypropan, n-proxygroup, isopropoxy, n-butoxypropyl or isobutoxy, preferably a methoxy group or ethoxypropan and more preferably a methoxy group.

As halogen for R2and R3in consideration of all independently of one another are, for example, fluorine, chlorine and bromine, preferably chlorine.

As With2-C4alkanolamines for R2are included in the review, for example, acetylamino and propionamidoxime, preferably acetylamino.

As With1-C4alkylsulfonyl for R2are included in the review, for example, m is tilsley, ethylsulfonyl, n-propylsulfonyl, isopropylphenyl and n-butylsulfonyl, preferably methylsulphonyl and ethylsulfonyl.

R2means carbarnoyl, corresponding to the radical of the formula-CONH2.

R2indicates sulfamoyl corresponding to the radical of the formula-SO2NH2.

Preferably, if R1denotes hydrogen.

Preferably, if (R2)sdenotes identical or different substituents selected from the group comprising halogen, a nitro-group, With2-C4alkanolamines and alphagroup, preferably the nitrogroup and alphagroup and more preferably a nitro-group.

Preferably, if (R3)0-2denotes from 0 to 2 identical or different substituents selected from the group comprising From1-C4alkyl, C1-C4alkoxygroup and alphagroup, preferably methyl, a methoxy group and alphagroup.

Particularly preferably, if R3denotes hydrogen.

Preferably, if T denotes the radical of formula (2C), (2d), (2E) or (2f), more preferably formula (2) or (2d) and even more preferably formula (2C).

Hal in reactive with respect to the fibers of the radical of the formula (2f) preferably denotes chlorine or bromine, preferably bromine.

As useplease U in the review is the turn on for example, -Cl, -Br, -F, -OSO3H-SSO3H, -OCO-CH3, ORO3H2, -OCO-C6H5, -OSO2-C1-C4alkyl-OSO2-N(C1-C4alkyl)2. Preferably, if U denotes a group of formula C1, -OS3H-SS3H, -OCO-CH3, -OCO-C6H5or ORO3H2more preferably-CL or-OSO3H.

Examples of suitable radicals Z is vinyl, β-bromo - β-chloroethyl, β-acetoxyethyl, β-benzyloxyethyl, β-phosphatidyl, β-sulphatoethyl and β-thiosulfinates. Preferably, if Z denotes vinyl, β-chloroethyl or β-sulphatoethyl and more preferably vinyl.

s preferably is 1, 2 or 3, more preferably is 1 or 2 and more preferably is 1.

Preferably, when m is 1.

Preferably, if n is 0.

Preferably, when q is 0.

Preferably, when r is 1.

Preferably, if Me denotes the chrome.

Preferably, if the radical of formula (2C) denotes the radical of the formula

where Z has the meanings and preferred meanings indicated above.

Preference is given to reactive dyes of the formula

in which

R1, R2X, T and s seablade values and preferred values above, and preferably, if R1denotes hydrogen, R2denotes a nitro-group, X denotes chlorine, T denotes a radical of the above formula (2C), preferably formula (2C') or (2), Z represents vinyl, β-sulphatoethyl or β-chloroethyl, preferably vinyl, and s is 1 or 2, preferably 1.

The dyes proposed in the present invention, is obtained by (i) using a suitable compounds of chromium, cobalt or iron is retrieved from the compounds of formula

and

metal complex dye composition 1:2 formula

and

(ii) on the first stage of condensation, carrying out the condensation of the metal complex dye composition 1:2 formula (5)obtained in stage (i), with galogenangidridy cyanuric acid formula

and

(iii) in the second stage of condensation, carrying out the condensation product of primary condensation formula

obtained in stage (ii)with the compound of the formula

or

(iv) carrying out the condensation of the metal complex dye composition 1:2 formula (5)obtained in stage (i)with the compound of the formula

R1, R2Me, X, T, m, n, r, s and q are all areas which indicate the values and preferred values above.

Suitable galogenangidridy cyanuric acid of the formula (6) is the acid chloride cyanuric acid.

The compound of formula (9) is known or can be obtained by analogy with known methods, for example, by condensation of gelegenheid cyanuric acid of the formula (6) with the compound of the formula (8)in which T has the meanings and preferred meanings indicated above.

Complex dyes chromium composition 1:2 formula (5) are known or can be obtained by analogy with the known compounds, for example, by the reaction of complex chromium compounds of structure 1:1 formula

with uzasadnienie formula (4), R1, (R2)s, m, n, r, s, and q all have the values and preferred values listed above in the present invention.

The reaction of complex chromium compounds of structure 1:1 formula (10) with uzasadnienie formula (4) is conducted, for example, in aqueous medium at a temperature equal to, for example, from 40 to 130°C., preferably from 70 to 100°C. the pH value equal to, for example, from 8 to 14, preferably at a pH value equal to from 10 to 13. The reaction is more preferably carried out in the presence of neutralizing inorganic acid reagent or in an alkaline medium, for example, in the presence of a carbonate of an alkali metal, alkali metal acetate or GI is rockside alkali metal, the preferred alkali metal is sodium.

Upon receipt of a complex metal on stage (i) in addition to complex metal structure 1:2 formula (5) usually also get its coordination isomer of the formula

In addition to the metal complexes, disclosed in the present invention in the form of formulas, for example, formula (1), (1A), (5) and (7), it is assumed that the disclosure also includes the corresponding coordination isomers.

Compounds of the formula(3), (4), (8) and (10) are known or can be obtained by analogy with known methods.

For example, complex compounds of chromium composition 1:1 formula (10) can be obtained by known methods of introducing chromium, in which the reaction with the chromium salt can be carried out, for example, in aqueous medium, optionally under pressure, at a temperature equal to, for example, from 90 to 130°C. Suitable chromium salts are, for example, acetate, chromium(III)nitrate chromium(III)chloride chromium(III), salicylate chromium(III) sulfate and chromium(III).

Compounds of the formulas (3) and (4) can be obtained by conventional diazotization reactions and combinations. The diazotization is usually carried out through action of nitrous acid in an aqueous solution of an inorganic acid at a low temperature, for example, from 0 to 20°C, and preferably in an alkaline medium, for example, at pH values equal to from 8 to 12.

Complex cu the bearers of azo compounds of cobalt or iron composition 1:2 formulas (3) and (4) are known or can be obtained by analogy with known methods.

Complex dyes chromium composition of 1:2 or cobalt composition of 1:2 can be obtained, for example, by analogy with the methods specified in GB-A-716753, GB-A-719274, GB-A-745641 and GB-A-851861. Complex dyes iron composition of 1:2 can be obtained, for example, by analogy with the methods specified US 5376151.

The condensation reaction is performed according to the methods, which in themselves known, usually in aqueous solution at a temperature equal to, for example, from 0 to 50°C, and when the pH value is equal to, for example, from 2 to 10.

The condensation of the metal complex dye composition 1:2 formula (5) with galogenangidridy cyanuric acid of the formula (6) in stage (ii) is preferably carried out at a temperature equal to from 0 to 5°C. and at a pH from 3 to 6. Condensation product of primary condensation formula (7) with the compound of the formula (8) in stage (iii) is preferably carried out at a temperature equal to from 0 to 30°C, and at pH 4 to 6. The condensation of the metal complex dye composition 1:2 formula (5) with the compound of the formula (9) in stage (iv) is preferably carried out at a temperature equal to from 20 to 50°C. and at a pH from 4 to 6.

In addition, the final product is optional, you can enter into the reaction conversion. This reaction conversion is, for example, the transformation is able to vinylrevinyl reactive group T (Z or Q) in its vinyl form by education is otci dilute solution of sodium hydroxide, such as, for example, the conversion of β-sulphatoethylsulphonyl or β-Kharatishvili group in vinylsulphonyl radical or the transformation of α, β-dialogproprietary.py in α-halogenacetylenes radical. Such reactions themselves known. The reaction conversion is usually carried out in the environment from neutral to alkaline at a temperature equal to, for example, from 20 to 70°C. the pH value equal to, for example, from 6 to 14.

Reactive dyes of formula (1) contain sulfopropyl and are normally in the form of the free sulfonic acids or, preferably, in the form of its salts, e.g. sodium, lithium, potassium or ammonium salts or salts with organic amines, for example, triethanolammonium salt.

Reactive dyes of formula (1) may include other additives, for example sodium chloride or dextrin.

Reactive dyes of formula (1)proposed in the present invention optionally may include other excipients, for example, make it more comfortable or improve the storage stability, such as, for example, buffer additives, dispersing substances or substances that prevent the formation of dust. Such excipients known to the person skilled in the technical field.

Reactive dyes proposed in the present from which Britanie, suitable for dyeing containing hydroxyl groups or nitrogen-containing fibrous materials and printing on them. Examples which can be mentioned are fibrous materials made of silk, wood, pulp and all types of polyurethane, and polyamide fibers. Cellulose fiber materials are, for example, materials made from natural cellulose fibers, such as fibers of cotton, flax and hemp, and cellulose and regenerated cellulose. Reactive dyes proposed in the present invention are also suitable for dyeing containing hydroxyl group of fibers and print them in mixed materials, for example mixtures of cotton with polyester fibers or polyamide fibers.

Preference is given to dyeing natural or synthetic polyamide fiber materials and printing on them, preferably synthetic polyamide fiber materials, such as, for example, nylon 6 (poly-ε-caprolactam), polyamide 6,6 (amide polyhexamethylenediamine acid), polyamide 7, polyamide 6,12 (amide polyhexamethylenediamine acid), polyamide 11 or polyamide 12, copolymers of amides with polyamide 6,6 or nylon 6, such as, for example, copolymers diamine, ε-caprolactam and adipic acid and copolymers adip the new acid, diamine and 2-methylpentylamine or 2-ethylmethylamino. Reactive dyes of formula (1)proposed in the present invention are also suitable for dyeing mixed fabrics or yarns of synthetic polyamide and wool and print on them.

The method proposed in the present invention is also particularly suitable for dyeing microfibers of synthetic polyamides and print on them. Microfiber mean fibrous material made from threads Tonino less than 1 denier (1.1 dtex). such microfiber known and are usually obtained by spinning from the melt.

Specified textile material can be a variety of processed forms, such as fibre, yarn, woven fabric or knitted material or the carpet.

Reactive dyes of formula (1) can be used for dyeing and printing using the conventional technology of dyeing and printing. In addition to water and the dyes, the dyeing liquid or paste for printing may include other additives, for example wetting agents, protivovspenivayushchie agents, levelling agents or agents that affect the properties of the textile material, for example softeners, additives for imparting fire resistance or dirt-, water - and oil-repellent agents, as well as water softeners and natural or si is synthetic thickeners, for example alginates and ethers of cellulose.

In the case of woven carpet material important are the techniques such as pressure seal and mnogoetajnoe dyeing.

Preference is given to dyeing, which is preferably carried out according to the technology of the exhaustion of the bath, and in the case of dyeing of carpets you can also use continuous technology.

Dyeing is preferably carried out at a pH value equal to from 2 to 7, preferably from 2.5 to 5.5, and more preferably from 3 to 4.5. The ratio of the mass of material to the weight of the dyeing liquid can be selected in a wide range, for example from 1:5 to 1:50, preferably from 1:5 to 1:30. Dyeing is preferably carried out at a temperature equal to from 80 to 130°C., preferably from 85 to 120°C.

Reactive dyes of formula (1) lead to uniform dyeing, characterized by good common characteristics, such as good resistance to the action of chlorine, to abrasion, to namachivanii, to abrasion when wet, to washing, to water, sea water and sweat and good resistance to exposure to light. They also differ in the formation of a uniform color, good affinity to the material, high reactivity, good fixation and a very good ability to accumulate on the material. The dyes offered in this is the next invention, highly soluble in water and easily combined with other dyes.

The dyes of formula (1)proposed in the present invention, also suitable for use as dyes in the recording devices. Such recording devices are, for example, a commercially available inkjet printers for printing on paper and textile materials, and writing instruments such as fountain pens and ballpoint pens, and preferably inkjet printers. For this purpose, the dyes proposed in the present invention, first make a form suitable for use in recording systems. A suitable form is, for example, aqueous ink, which as dyes include the dyes proposed in the present invention. Ink can be prepared in the usual manner by mixing the individual components in the required amount of water.

As substrates are included in the review above containing hydroxyl groups or nitrogen-containing fibre materials, preferably natural or synthetic polyamide fiber materials. Preferably, if the fibrous material is a fibrous textile materials.

The substrate, which are also included in the review are paper and plastic film.

In quality the ve examples of paper can be mentioned commercially available paper for inkjet printers, photo paper, glossy paper, paper with plastic coating, for example, ink jet paper Epson photo paper Epson glossy paper Epson glossy film Epson special paper for inkjet printers HP premium glossy photo paper Encad and Ilford photo paper. Plastic films are, for example, transparent or cloudy/opaque. Suitable plastic films are, for example, a transparent film of 3M.

Depending on the destination, for example, for printing on textile materials or on paper, you can be necessary appropriate modification, for example, viscosity or other physical characteristics of the ink, preferably of characteristics that affect the affinity for the substrate.

The dyes used in aqueous ink, preferably should have a low salt content, i.e. they must have the full salt content equivalent to less than 0.5 wt.% in terms of the weight of the dyes. Dyes, which according to the technology of their preparation and/or due to the subsequent addition of diluents have a relatively high salt content, you can obsolete, for example, by membrane separation techniques, such as ultrafiltration, reverse osmosis or dialysis.

The ink preferably have the full content of the dyes is equal to from 1 to 35 wt.%, site is preferably - from 1 to 30 wt.% and more preferably from 1 to 20 wt.% in terms of total mass of the ink. In this case, a preferable lower limit value is 1.5 wt.%, more preferably 2 wt.% and even more preferably 3 wt.%.

The ink may include miscible with water and organic solvents, for example, With1-C4alcohols, such as methanol, ethanol, n-propanol, isopropanol, n-butanol, sec-butanol, tert-butanol or Isobutanol; amides, e.g. dimethylformamide or dimethylacetamide; ketones or ketaspire, for example, acetone or datetoday alcohol; ethers, e.g. tetrahydrofuran or dioxane; nitrogen-containing heterocyclic compounds, for example, N-methyl-2-pyrrolidone or 1,3-dimethyl-2-imidazolin, polyalkylene glycols, e.g. polyethylene glycol or polypropyleneglycol;C2-C6alkalophile and thioglycol, for example, ethylene glycol, propylene glycol, butyleneglycol, triethylene glycol, thiodiglycol, hexyleneglycol and diethylene glycol; other polyols, such as glycerol or 1,2,6-hexanetriol; and (C1-C4alkalemia esters of polyhydric alcohols, for example, 2-methoxyethanol, 2-(2-methoxyethoxy)ethanol, 2-(2-ethoxyethoxy)ethanol, 2-[2-(2-methoxyethoxy)ethoxy]ethanol or 2-[2-(2-ethoxyethoxy)ethoxy]ethanol; preferably N-methyl-2-pyrrolidone, diethylene glycol, glycerol or preference is sustained fashion - 1,2-propylene glycol, usually in an amount of 2 to 30 wt.%, preferably from 5 to 30 wt.% and more preferably from 10 to 25 wt.% in terms of total weight of ink.

In addition, the ink may include soljubilizatory, for example, ε-caprolactam.

The ink may include thickeners of natural or synthetic origin, in particular, intended to regulate the viscosity.

Examples of thickeners that may be mentioned include commercially available thickeners, ethers, starch or ethers, carob, preferably sodium alginate on its own or in a mixture with modified cellulose, such as methylcellulose, ethylcellulose, carboxymethyl cellulose, hydroxyethyl cellulose, methyl hydroxyethyl cellulose, hydroxypropylcellulose or hypromellose, particularly preferably from 20 to 25 wt.% carboxymethylcellulose. Synthetic thickeners that may be mentioned are, for example, based on poly(meth)acrylic acid or poly(meth)acrylamide, and also polyalkylene glycols having a molecular weight equal to, for example, from 2000 to 20,000, such as polyethylene glycol or polypropyleneglycol or mixed polyalkylene glycols of ethylene oxide and propylene oxide.

Ink include thickeners, is for example, in the amount of 0.01 to 2 wt.%, preferably from 0.01 to 1 wt.% and more preferably from 0.01 to 0.5 wt.% in terms of total weight of ink.

The ink may also include buffering agents, for example, borax, borates, phosphates, polyphosphates or citrates. Examples which can be mentioned include borax, sodium borate, sodium tetraborate, sodium dihydrophosphate, sodium phosphate, sodium tripolyphosphate, Pentapolis sodium and sodium citrate. They are preferably used in amounts comprising from 0.1 to 3 wt.%, more preferably from 0.1 to 1 wt.% in terms of total mass of the ink, to establish a pH value equal to, for example, from 4 to 9, preferably from 5 to 8.5.

As other ink additives may include surfactants or water-retaining substance.

Suitable surfactants include commercially available anionic or nonionic surfactants. As a water-retaining substances in the ink, provided in the present invention, are included in the review, for example, urea or a mixture of sodium lactate (preferably in water solution concentration from 50 to 60%) and glycerol and/or propylene glycol in amounts of, preferably constituting from 0.1 to 30 wt.%, more preferably from 2 to 30 wt.%.

The fields is their preferred ink having a viscosity equal to from 1 to 40 MPa· s, preferably from 1 to 20 MPa·s and more preferably from 1 to 10 MPa·S.

In addition, the ink may additionally include the conventional additives, for example, protivovspenivayushchie agents or, preferably, the preservatives that inhibit the growth of fungi and/or bacteria. Such additives are usually used in amounts comprising from 0.01 to 1 wt.% in terms of total weight of ink.

As preservatives are included in the review form formaldehyde agents, for example, paraformaldehyde, trioxane, preferably aqueous solutions containing from about 30 to 40 wt.% formaldehyde, derivatives of thiazole, for example, 1,2-benzisothiazolin-3-one or 2-n-acterization-3-one, iodine compounds, NITRILES, phenols, halogenacetylenes or derivatives of pyridine, preferably 1,2-benzisothiazolin-3-one or 2-n-acterization-3-one. A suitable preservative is, for example, 20 wt.% a solution of 1,2-benzisothiazolin-3-she dipropyleneglycol (Proxel®GXL).

The ink can also include additional additives, such as fluorinated polymers or telomeres, for example polioksietilirovannogo alcohols (products Forafac®or Zonyl®) in an amount of, for example, from 0.01 to 1 wt.% in terms of total weight of ink.

The inkjet printing individual kapalicarsi adjustable image is sprayed onto the substrate from a nozzle. There are methods of continuous inkjet printing and drip pulse-jet printing, which is used for this purpose. In the case of continuous ink jet printing droplets are formed continuously, the droplets not required for printing, drop in sink and recycle. On the other hand, in the case of drip pulse-jet printing droplets are formed if necessary, and used for printing; i.e. droplets are formed only if they are necessary for printing. The formation of droplets can be realized, for example, using piezography or by using thermal energy (drip spray). Preference is given to printing using piezography and techniques of continuous inkjet printing.

Accordingly, the present invention also relates to aqueous inks, which include dyes of formula (1)proposed in the present invention, and to the use of such inks in the method of inkjet printing for printing on various substrates, preferably textile fibrous materials, the above definitions and preferences are dyes, inks and substrates.

The following examples are intended to illustrate the present invention. If not indicated otherwise, temperature is given in degrees Celsius, parts and percentages are mass. The ratio of the mass of the parts to the volume which correspond to the ratio of kilograms to litres.

Example 1:

(a) 26.4 Parts of the connection, which is in the form of the free acid corresponds to the formula

stirred in 100 parts of water. The suspension is cooled to 0°C by adding about 50 parts of ice and the pH adjusted to 4 with aqueous solution of sodium hydroxide, maintaining the temperature of 0°C by cooling with ice. The resulting solution was slowly added to a suspension of 18.2 parts of the acid chloride cyanuric acid in 20 parts of water, 80 parts of ice and 0.2 parts of Na2HPO4·12H2O, the pH value of support is equal to 3 by adding an aqueous solution of sodium hydroxide and the temperature of the support is equal to 0°C by adding ice. Receive a suspension, which comprises a compound of the formula

in the present invention, in the form of the free acid.

(b) 43 parts of a compound which in the form of the free acid corresponds to the formula

get in suspension 550 parts of water, 15 parts of formic acid and 6.8 parts of chromium acetate(III) and heated in an autoclave at a temperature equal to from 100 to 105°C. for 20 hours, the Pressure is about 3 bar. After cooling to room temperature usageprice the product is filtered, washed with water and dried in a vacuum at a temperature of 50°C. Obtain the compound of structure 1:1, which is in the form of the free acid corresponds to the formula

(C) 38.8 Parts of monoisocyanates, which is in the form of the free acid corresponds to the formula

and which is obtained by the usual methods from diazotized 4-nitro-2-chromium complex obtained in stage (b), 600 parts of water to homogeneity and heated to 70°C. the pH Value equal to from 8.0 to 8.5, establish and maintain by adding 2 n sodium hydroxide solution. Mixing is carried out at a specified temperature, while in the obtained transparent solution will not cease to discover both the source of the connection. Get isomeric coordination compounds, which are in the form of the free acids correspond to the formula

and

(d) Transparent solution is allowed to cool to 50°C, the pH value was adjusted to about 5 by addition of aqueous hydrochloric acid and slowly added to the suspension obtained in stage (a), the pH value of support is equal to 5 by adding an aqueous solution of sodium hydroxide. To complete the reaction, stirring is carried out for a further 2 h and the solution to remove salt through dialysis at pH 6-7 and concentrated to dryness by evaporation. Get a dye which in the form of free acid which thou corresponds to the compound of formula

(101)

and its coordination isomer (λmax=570 nm) and with his help carry out the dyeing containing amino fibers on them in a deep black color, having in General a very good resistance, or printing on them.

Example 2:

An aqueous solution of the dye obtained in example 1 is treated for approximately 2 h at room temperature with sodium hydroxide when the pH value is equal to 11. From the resulting solution to remove salt through dialysis and concentrated by evaporation. Get a dye which in the form of the free acid corresponds to the compound of formula

and its coordination isomer (λmax=572 nm). The dye of formula (102) dyes containing amino groups of fibers in a deep black color, having a very good resistance to moisture, even without subsequent fixation, especially when using methods of dyeing, as described in the application for the European patent No. 03104150.2.

Examples 3-6:

The dyes of the formula

max=570 nm)

and

max=570 nm),

as well as the corresponding calironia and vinnilirunnu forms, can be obtained by methods similar to those described in examples 1 and 2 (in addition to the dyes of the formula (103) and (104), disclosed is a formula, it is assumed that the disclosure includes corresponding coordination isomers).

Example 7:

(a) Within 10 to 15 min at a temperature equal to from 0 to 2°C, 4,7 part of the acid chloride cyanuric acid are suspended in 47 parts of ice, 23 parts of water and 0.025 part of Na2HPO4×12H2O. Then for 45 min at a temperature equal to from 0 to 2°C, add a solution of 22.3 parts of the dye obtained in example 1(c)maintaining the temperature equal to from 0 to 2°C by adding ice and the pH value is maintained within the range of 5 to 6 by adding 2 N. aqueous sodium hydroxide solution. Then stirring is carried out for 40 min at a temperature of from 0 to 2°C and a constant pH.

Get a connection that is in the form of the free acid corresponds to the formula

and its coordination isomer.

(b) 8,2 Part of the connection, which is in the form of the free acid corresponds to the formula

dissolved in 140 parts of water. Thus obtained solution for 45 min added dropwise to the solution obtained in stage (a). During the addition the pH value of support is equal to 6 with 2 N. aqueous sodium hydroxide solution. Then stirring is carried out overnight at pH 6. From the reaction mixture to remove salt through dialysis and concentrated by vol the air traffic management. Get a dye which in the form of the free acid corresponds to the formula

and its coordination isomer (λmax=572 nm) and with his help carry out the dyeing containing amino fibers in a deep black color or print on them with very good resistance to moisture.

Example 8:

An aqueous solution of the dye obtained in example 7, the process for about 2 h at room temperature with sodium hydroxide when the pH value is equal to 11. From the resulting solution to remove salt through dialysis and concentrated by evaporation. Get a dye which in the form of the free acid corresponds to the formula

and its coordination isomers (λmax=573 nm). The dye of formula (106) dyes containing amino groups of fibers in a deep black color, having a very good resistance to moisture, even without subsequent fixation, especially when using methods of dyeing, as described in the application for the European patent No. 03104150.2.

Examples 9-12:

The dyes of the formula

max=574 nm)

and

max=574 nm),

as well as the corresponding calironia and vinnilirunnu forms, can be obtained by methods similar to the one used the examples 7 and 8 (in addition to the dye of formula (107) and (108), revealed in the form of formulas, it is assumed that the disclosure includes corresponding coordination isomers).

Method of dyeing 1:

10 Parts of fibrous material made of polyamide 6,6 (Helanca tricot), are dyed in 500 parts of liquid, the pH value of which is brought to 3 with acetic acid. The content of the dye obtained in example 8, 2%, calculated on the weight of the fiber. Time dyeing at a temperature equal to 98°C, 30 to 90 minutes and Then dyed fibrous material is extracted, rinsed with water and cleaned from the unfixed dye using alkaline leaching at pH from 10 to 11.5 and a temperature of from 70 to 90°C for 20 to 30 minutes After repeated rinsing with water and acidification to pH 4 in the liquid with acetic acid fibrous material is dried. Get painted in a deep black color material with superior resistance to moisture.

Method of dyeing 2:

70 g of a Mixed material containing 72% polyamide microfibers and 28% elastane, machine for dyeing for 10 min at 40°C is treated with 1.5 liters of water containing 3 g of formic acid, 0.4 g of the wetting agent and 0.7 g of a leveling agent. The pH value of the liquid is equal to 2.9. Then added 3.8 g of the dye obtained in example 2, previously dissolved in a small share of the ve water. Dyed material is treated for 5 min at 40°C in the dyeing liquid and then heated at 100°C and stained for 20 min at this temperature. Then add 14 g of calcium chloride and then spend staining within 40 minutes After dyeing, the material is treated for 20 minutes at a temperature of from 70 to 90°C using 1.5 l of a solution for additional processing, containing 2 g of 1,6-diamine. The material is then rinsed and subjected to the usual finishing treatment. Get dyed in a deep color material with very good durability.

To further enhance durability, you can add a stage regular additional fixation or alkaline treatment. In case of additional alkaline treatment of the dyed material is treated for 20 minutes at a temperature of from 60 to 80°C in freshly prepared liquid containing 2 g/l soda at pH of 9.2.

Method of dyeing 3:

Dyeing liquid, in which 1000 parts of the dyeing liquid contains 3 parts of the dye obtained in example 2 and 1 part of a commercially available thickening agent, 1 part of a nonionic wetting agent and the amount of citric acid required to establish the pH of the dyeing liquid is 5.0, is used for continuous dyeing of woven carpet material is material, made of polyamide 6,6. Then woven carpet material is fixed in a pair for 5 min at 100°C and washed and dried as usual. Woven carpet material has a uniform deep black color, with good durability.

Method of dyeing 4:

10 parts of wool knit material is stirred at 30°C in the dyeing liquid, which contains 1,6 part of the dye obtained in example 2, 0.5 part of sodium sulfate and 2 parts of sodium acetate in 100 parts of water and the pH value is increased to 4.5 with acetic acid (80%). The liquid is boiled for 45 min and maintain at boiling for a further 45 to 70 minutes Then dyed material is extracted, carefully rinse with cold water and dried. Get painted in a deep black color material with very good durability.

Method print I

(a) Mercerized cotton satin fabric is subjected plynovodem dyeing liquid containing 30 g/l of sodium carbonate and 50 g/l of urea (70% supporting liquid) and dried.

(b) using the head for drip-pulse inkjet (bubble print on cotton satin pretreated at the stage of (a) type aqueous ink containing

- 15 wt.% the reactive dye of formula (102)obtained in example 2,

- 15 wt.% 1,2-propylene is Olya and

- 70 wt.% water.

The printed material is completely dried and fixed in saturated steam for 8 minutes at 102°C, subjected to cold rinsing, washed at the boil, rinsed again and dried.

1. Reactive dye of the formula

in which R1denotes hydrogen,
(R2)sdenotes the nitrogroup,
X denotes chlorine,
T denotes reactive with respect to the fiber radical of the formula


or

where (R3)0-2denotes 0
Z denotes vinyl or a radical-CH2-CH2-U and U denotes a group which can be removed in an alkaline environment,
Q denotes a group-CH(l)-CH2-l or-C(l)=CH2,
Hal represents halogen, and
s is 0 or 1.

2. Reactive dye according to claim 1, in which Z denotes vinyl, β-chloroethyl or β-sulphatoethyl.

3. A method of obtaining a reactive dye of formula (1A) according to claim 1, which includes
(i) using a suitable chromium compounds to the compounds of formulas
and
metal complex dye composition 1:2 formula

(ii) in the first phase con is Ansatie, holding condensations metal complex dye composition 1:2 formula (5)obtained in stage (i), with galogenangidridy cyanuric acid formula

and
(iii) in the second stage of condensation, carrying out the condensation product of primary condensation formula

obtained in stage (ii)with the compound of the formula
T-N (8),
or
(iv) carrying out the condensation of the metal complex dye composition 1:2 formula (5)obtained in stage (i)with the compound of the formula

R1, R2X, T, s all have the meanings given in claim 1.

4. The use of a reactive dye according to claim 1 for dyeing containing hydroxyl groups or nitrogen-containing fibrous material or printing on it.

5. The use according to claim 4, in which carry out the dyeing natural or synthetic polyamide fiber material, or print it, preferably synthetic polyamide fiber material.

6. Aqueous inks, which include reactive dye of formula (1) according to claim 1.

7. A method of printing textile fibre materials, paper or plastic film by the method of ink jet printing which comprises applying the aqueous ink according to claim 6.



 

Same patents:

The invention relates to the synthesis of monoisocyanates, in particular to new connections - dinatrium salts 4-sulfondiethylmethane-2-X-4'-amino-N-metalsalt-2'-Y-azobenzene with versatility for dyeing wool, nylon, cotton and cotton-Dacron materials and natural leather and printing of cotton, Dacron and cotton Mylar material

The invention relates to dyeing and finishing production of textile and knitting industry and can be used in the finishing of fabrics and knitted fabrics of cellulose fibers

FIELD: chemistry.

SUBSTANCE: invention relates to compositions for marking substrates. The invention describes a composition for marking substrates, which contains 0.01-50 wt % colourant, 0.01-50 wt % metal salt and carboxylic acid, 1-80 wt % binder and 1-99 wt % organic solvent. Also described is a method of preparing the said composition, a substrate coated with the said composition and a method of marking substrates using the said compositions. The disclosed composition is based on using readily accessible carboxylic acid salts which can not be coloured before exposure to effects of energy.

EFFECT: composition enables to obtain semi-transparent or transparent coatings with high intensity and brightness.

9 cl, 14 ex

FIELD: printing.

SUBSTANCE: there is described composition of inks for jet printers including jet forming thinner, containing organic cosolvents, surfactant and buffer solution, the set of solid pigments samodispergirovannyh in this diluent, and a complex poluefir and styrene maleic anhydride (SMA), dispersed in this diluent. System for printing images on a substrate is also described, including the printing head, filled with inks able to form jet.

EFFECT: offered inks provides decrease in a time of drying at achievement of a sharp image and decrease in quantity of surfactants or wetting agent or their absence in inks on the basis of black pigment.

10 cl, 5 dwg, 3 tbl, 1 ex

FIELD: chemistry.

SUBSTANCE: invention relates to liquids for holding aqueous ink on paper for jet printing. A liquid is described for holding water-based ink onto paper, containing a non-curling co-solvent in form of an inner salt, with a sp3-hybrid nitrogen cation and associated anionic charge, insulated on the oxygen anion, directly bonded to the sp3-hybrid nitrogen cation, or insulated between oxygen atoms of a carboxylate group, and is a compound which contains a group chosen from ammonium-N-oxide, N, N, N-trimethylglycinate and amino acid. Described also is use of the said liquid for holding ink on paper to prevent paper from curling during printing.

EFFECT: obtaining liquid for holding water-based ink onto paper, which efficiently reduces curling and deformation of printing paper.

14 cl, 9 tbl, 7 ex

FIELD: physics; image processing.

SUBSTANCE: present invention pertains to a protective element for counterfeit protected paper, valuable documents etc. as well as the counterfeit protected paper and valuable documents, method of making such a protective element, printing ink containing pigment with variable optical properties and method of making such printing ink. The protective element contains a thin-layer element with a colour tilt effect, consisting of a reflecting layer, absorbing layer and an intermediate layer between the reflecting layer and the absorbing layer. The intermediate layer is formed by the printing layer, containing dispersed particles with monomodal or oligomodal size distribution.

EFFECT: obtaining a simple protective element which can be made cheaply and which has high level of security from counterfeit.

62 cl, 12 dwg

FIELD: printing technology.

SUBSTANCE: paint for ink-jet printing contains synthetic food colourant, glycerin and sodium dodecylbenzenesulfonate as surface active substance, sorbit acid as preservation agent, liquid ammonia, isopropyl alcohol and distilled water. Environmentally clear, affordable and cheap components are used as painting ingredients.

EFFECT: four-colour printing with fast paint setting on paper; compatibility with any printing units and prevention of contacting printing units damage.

1 tbl, 3 ex

FIELD: print engineering.

SUBSTANCE: invention provides ink containing first fluorescent color material emitting fluorescence at specified emission wavelength used for measurement or determination of excitement at specified excitement wavelength; and second fluorescent color material emitting fluorescence when excited at specified excitement wavelength, said second color material being contained in larger amount than said first color material. To obtain fluorescence at desired emission wavelength, excitement spectrum of the first color material in ink should have peak wavelength range adjoining specified fluorescent wavelength, and emission fluorescence spectrum of the second color material has emission wavelength range that includes at least above-mentioned peak wavelength range.

EFFECT: enhanced fluorescence intensity due to presence of several fluorescent coloring substances.

9 cl, 26 dwg, 3 tbl, 6 ex

FIELD: chemical industry; printing industry; powder metallurgy industry; cosmetic industry; other industries; production and application of the highly anticorrosive metallic pigments.

SUBSTANCE: the invention is pertaining to production of the of the highly anticorrosive metallic pigments similar to laminas, which may be used in production of the printing ink, plastic materials, cosmetics, the powder coatings and in other branches of industry. The pigments have on their surfaces: the metallic substrates similar to the laminas and treated with the compounds of the phosphoric acid and-or the compounds of the boric acid; one or more layers of the coatings consisting of one or more hydrated oxides of the metals of one or more metals selected from the group, which includes silicon, aluminum, zirconium, titanium and tin. On the basis of the highly corrosive metallic pigments similar to laminas it is possible to produce the interferential colored pigments. The invention allows to increase the anticorrosive resistance of the metallic pigments at the expense of saving without the faults of the initial surface smoothness of the similar to the laminas metallic substrates, to increase the homogeneity and density of the layers of the hydrated oxides of the metals.

EFFECT: the invention ensures the increased anticorrosive resistance of the metallic pigments, saving the initial surface smoothness of the similar to the laminas metallic substrates, the increased homogeneity and density of the layers of the hydrated metals oxides.

40 cl, 9 ex, 4 tbl, 8 dwg

FIELD: chemical industry; printing industry; other industries; methods of production of the composition of the paint including the optically changeable pigments.

SUBSTANCE: the invention may be used in production of the optically changeable pigments. The optically changeable pigment includes the stratified set composed of the different materials, in which, at least, one of the layers represents the reflecting layer and, at least, one of the other layers represents the dielectric layer. At least, one of the surfaces of the indicated layers is subjected to the chemical action. The indicated materials also include, at least, one of the layers, which represents the semitransparent metallic layer made out of chromium and also one or more metals and-or their inorganic compounds. At that the metal and-or its inorganic compound are subject to corrosion. The subjected to the chemical action surface of the reflecting and dielectric layer along the edge of the layering block of the edge structure of the pigment is coated with the passivating agent, which is selected from the group consisting of the organic esters and the fluorinated organic esters of the phosphoric acid, having the following structural formula: (Rf-CH2-CH2-O)xP(O)(OH)y, where Rf=F-(CF2-CF2)z, х=1 or 2, у=2 or 1, х+у=3, z=l-7. The composition of the printing paint includes the binding system, water and the optically changeable pigment. The invention allows to diminish oxidation of the metallic layers and dissolution of the dielectric layers of the optically changeable pigment and to use it in the compositions of the printing paint.

EFFECT: the invention allows to diminish oxidation of the metallic layers and dissolution of the dielectric layers of the optically changeable pigment and to use it in the compositions of the printing paint.

22 cl, 7 ex

FIELD: marking and identification of protected articles, such as bank-notes, service papers, labels, foil, fiber, card or industrial products.

SUBSTANCE: proposed printing ink contains dyes or pigments of expanded or hyperchromatic color space which is not reproduced by means of standard 4-color reproducing equipment. Identification of marking includes mathematical conversion of non-processed spectral information into statically independent hyperchromatic coordinates and comparison of selected hyperchromatic coordinates with respective standard magnitudes. Specification gives also description of printing inks and method of marking and identification of articles.

EFFECT: enhanced efficiency.

25 cl, 6 dwg, 2 tbl, 4 ex

FIELD: polymer production.

SUBSTANCE: invention relates to production of polymeric binders for toner and can be used for copying appliances and printers. Process comprises separate preparation via emulsion polymerization of (i) low-molecule weight copolymer of styrene (α-methylstyrene), 2-ethylhexyl acrylate (or butyl acrylate) and methacrylic acid at monomer weight ratio (88-91.5):(8-11):(0.5-1.0) with intrinsic viscosity in toluene 0.08-1.2 dL/g and (ii) high-molecule weight copolymer of styrene (α-methylstyrene) and 2-ethylhexyl acrylate (or butyl acrylate) at monomer weight ratio (88-92):(8-12) with intrinsic viscosity in toluene 1.0-1.28 dL/g. In both cases, polymerization is carried out at 60-70% to monomer conversion close to 100%. Resulting latexes of low- and high-molecule weight copolymers are supplemented by stopper and antioxidant and then mixed with each other at "dry" weight ratio between 70:30 and 75:25 and coagulated intrinsic viscosity in toluene 1.0-1.28 dL/g. with electrolyte solutions to form polymer characterized by intrinsic viscosity in toluene 0.4-0.45 dL/g and polydispersity Mw/Mn, which ensures bimodal molecular weight distribution of copolymer. The latter has melting (spreading) point 125-137°C and softening temperature 70-75°C.

EFFECT: improved quality of electrographic printing.

2 cl, 1 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to reactive metal-complex azo dyes, specifically to reactive dyes of formula where R1 is hydrogen, (R2)5 is a nitro group, X is chlorine, T is a radical of formula , ,

or

,

where (R3)0-2 -0, Z is a vinyl or -CH2-CH2-U, U is a group removable in an alkaline medium, Q - -CH(Hal)-CH2-Hal or -C(Hal)=-CH2, Hal is a halogen, s equals 0 or 1.

EFFECT: disclosed dyes have high resistance to wet processing, especially when dyeing or printing synthetic polyamide fibre materials.

7 cl, 12 ex

FIELD: chemistry.

SUBSTANCE: invention relates to reactive metal-complex azo dyes, specifically to reactive dyes of formula where R1 is hydrogen, (R2)5 is a nitro group, X is chlorine, T is a radical of formula , ,

or

,

where (R3)0-2 -0, Z is a vinyl or -CH2-CH2-U, U is a group removable in an alkaline medium, Q - -CH(Hal)-CH2-Hal or -C(Hal)=-CH2, Hal is a halogen, s equals 0 or 1.

EFFECT: disclosed dyes have high resistance to wet processing, especially when dyeing or printing synthetic polyamide fibre materials.

7 cl, 12 ex

FIELD: chemistry.

SUBSTANCE: invention relates to novel reactive dyes for dyeing or printing on fibrous textiles. Described are reactive dyes of formula (1), where A is bivalent radical of formula , or , R1-R7, X, T, q, s, t, u assume values given in the claim. The invention also describes a method of producing said dye, water-based ink based thereon and use thereof.

EFFECT: disclosed dyes provide high resistance of the dye or drawing on synthetic nitrogen- or hydroxy-containing fibrous materials to washing and light, especially on polyamide fibrous materials.

14 cl, 5 ex

FIELD: chemistry.

SUBSTANCE: invention can be used for dyeing or printing fibrous materials, which contain nitrogen atoms or hydroxy groups. Mixtures of dyes, containing, at least, one dye, colouring red, of formula (1) , at least, one dye from a group of formulae (2) and (4) and, at least, one dye from a group of formulae (3) , (5) and (6) .

EFFECT: invention makes it possible to obtain a composition of dyes, applied for two-coloured or three-coloured dyeing of fibrous materials, possessing high resistance to light and water, good colour saturation and high chemical activity.

11 cl, 7 tbl, 6 ex

FIELD: printing inks.

SUBSTANCE: invention relates to materials generating charge, in particular to printing inks and toners for protective marking and applying protective markers in order to reveal falsifications and counterfeits. Use of counterfeit protection technology is described involving printing ink composition containing charge-generation substance and a medium, wherein charge-generation substance has maximum absorption in near IR region within a range of 700-1500 nm and in visible region within a range of 400-700 nm, this substance being compound selected from a type of polymorphous modification of X form of metal-free phthalocyanine, type of polymorphous modification of Y form and phase I and II forms of titanyloxyphthalocyanine, polymorphous modification of phase II form of vanadyloxyphthalocyanine, and polymorphous modification of phase V form of hydroxygalliumphthalocyanine and methoxygalliumphthalocyanine. Printing ink composition is applied onto an article or substrate using known printing procedure. Methods of establishing authenticity of an article or substrate are also described, which consist in determining characteristic absorption of marker in near IR region.

EFFECT: enabled effective protection of articles or substrates when using printing inks containing, for example, blue or green dyes, whose absorption bands can be shifted to infrared region and partially mask absorption properties of marker.

20 cl, 4 tbl, 6 ex

FIELD: printing technique.

SUBSTANCE: set and method of printing can be used for printing light-absorbing signs of protection of printed items. Set of printing ink for printing of light-absorbing signs has at least two dyes. Any dye has at least one dyeing matter, pigment of dye which absorbs visible light. Set of printing inks has first and second groups of dyes. Dyes from first group additionally have mark with preset spectral absorption characteristic, preferably with characteristic relating to absorption. Mark has absorption maximum within wavelength range of 700-900 nm, preferably, 780 nm, and the mark practically doesn't absorb light within visible spectrum of absorption. Dyes of second group has dyeing matter, dye or pigment, which absorbs light within visible light spectrum and they have the same maximum of absorption within IR-red spectrum at wavelength around 700 nm as spectral characteristic within IR-red range of mark, Method of printing signs, printed item and set of dyes, including four-color set of printing inks and IR-mark, are described.

EFFECT: reliability of identification of authenticity of item independently on color of signs.

15 cl, 5 dwg, 2 app

FIELD: printing dyes.

SUBSTANCE: invention relates to concentrate of printing dyes and a method for its preparing. Invention describes dye concentrate for offset printing in form non-sticky granules covered by envelope and/or non-sticky granules without envelope with the pigment content in its 45-65 wt.-%. Envelope-cover consists of powder-like solid materials, wax or liquid materials, for example, oil. Also, invention describes a method for preparing indicated concentrate that involves grinding dye concentrate for offset printing and its covering by envelope wherein covering by envelope is carried out by direct applying powder-like solid material on the printing dye concentrate and wherein powder-like solid materials are combined firstly with liquid carrier followed by its evaporation, or solid envelope is prepared by applying melted material useful for coating. Invention provides decreasing viscosity and stickiness of the printing dye concentrate and allows simple transporting and simple mixing with additional components.

EFFECT: improved and valuable properties of concentrate.

9 cl, 12 ex

FIELD: chemical industry; methods of production of the coatings with the strong adhesion.

SUBSTANCE: the invention is pertaining to the method of production of the coatings with the strong adhesion on the inorganic or organic substrate, which provides, that one inorganic or organic substrate is subjected to the treatment with the low-temperature plasma, the corona discharge or the treatment with the gaseous flame, at the normal atmospheric pressure deposit on the inorganic or organic substrate one or several photoinitiating agents or the mixtures of the at least one ethylene- unsaturated with the monomers and-or the oligomers containing at least one ethylene- unsaturated group, or the solutions, suspensions or emulsions of the above indicated substances using the suitable methods; the above indicated substances are not necessary subjected to drying and-or to the electromagnetic irradiation; and either on the preliminary so treated substrate deposit the composition including at least one ethylene- unsaturated monomer or the oligomer and the coating is subjected to hardening under action of the UF/ the visual rays emission or the electron beam; or on the substrate with such a preliminary coating made out of the photoinitiating agent they apply the printing ink coating and dry it. The method has the high efficiency and allows to produce the coating with the good adhesion and is suitable for to production of the products made out of the various plastics materials and-or metals or the glass types with the coatings having the good adhesion.

EFFECT: the invention ensures the high efficiency of the method, production of the highly adhesive coatings suitable for manufacture of the products made out of the various plastics materials, metals or the glass types.

18 cl, 19 ex

FIELD: polymer production.

SUBSTANCE: invention relates to production of polymeric binders for toner and can be used for copying appliances and printers. Process comprises separate preparation via emulsion polymerization of (i) low-molecule weight copolymer of styrene (α-methylstyrene), 2-ethylhexyl acrylate (or butyl acrylate) and methacrylic acid at monomer weight ratio (88-91.5):(8-11):(0.5-1.0) with intrinsic viscosity in toluene 0.08-1.2 dL/g and (ii) high-molecule weight copolymer of styrene (α-methylstyrene) and 2-ethylhexyl acrylate (or butyl acrylate) at monomer weight ratio (88-92):(8-12) with intrinsic viscosity in toluene 1.0-1.28 dL/g. In both cases, polymerization is carried out at 60-70% to monomer conversion close to 100%. Resulting latexes of low- and high-molecule weight copolymers are supplemented by stopper and antioxidant and then mixed with each other at "dry" weight ratio between 70:30 and 75:25 and coagulated intrinsic viscosity in toluene 1.0-1.28 dL/g. with electrolyte solutions to form polymer characterized by intrinsic viscosity in toluene 0.4-0.45 dL/g and polydispersity Mw/Mn, which ensures bimodal molecular weight distribution of copolymer. The latter has melting (spreading) point 125-137°C and softening temperature 70-75°C.

EFFECT: improved quality of electrographic printing.

2 cl, 1 tbl, 4 ex

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