Colored paint for the stencil printing on the internal side of the pressurized castings

FIELD: chemical industry; polygraphy; methods of the stencil printing.

SUBSTANCE: the invention is pertaining to the paint suitable for the stencil printing inside the pressurized castings. The invention describes the paint suitable for the printing films made out of the transparent thermoplastic, consisting predominantly of: a) one or several pigments; b) the binding in the solution in c) the organic solvent or in the mixture of the organic solvents, d) the routine auxiliary materials, if it is desirable, at that as the binding use the copolymer of the poly-(metha)-acrylate containing (м1) from 50 up to 90 % to the mass of alkylmethacrtlate having from 1 up to 6 atoms of carbon in the ethereal radical; (м2) from 5 up to 25 % to the mass, at least, one vinylaromatic compound; (м3) from 1 up to 25 % to the mass of maleic anhydride, and if it is desirable, (м4) from 0 up to 5 % to the mass of the alkylacrylate having from 1 up to 6 atoms of carbon in the ethereal radical or the copolymer of the poly-(metha)-acrylamide containing polymethylmethacrylate with the degree of imidization from 65 up to 80 %, to 1 up to 15 mass % of methacrylic acid and from 1 up to 15 mass % of methacrylic anhydrade. At that the indicated copolymer has the softening temperature by VIKA (ISO 306 B) at least of 115°С. As the dissolvents use aliphatic, cycloaliphatic and aromatic hydrocarbons, ketones, esters, ethers, alcohols, phenoles or their mixtures. The invention also describes the film made out of the thermoplastic printed by the above described paint; the pressurized casting consisting of the film made out of the thermoplastic printed on the opposite side with the above described paint and supplied on this side with the layer of the thermoplastic coating. At that the indicated layer is applied by the operation of pressure die casting on the inside and at that the film and-or the plastic material for operation of the pressure die casting on the inside represents the copolymer of polymethylmethacrylate; and the method of production of the pressurized castings includes the following stages: a) stencil printing of the thermoplastic films by the above described method, b) the film molding, c) the pressurized castings on the inside on the stencil printed film side in the casting mould with the thermoplastic, and d) removal of the pressurized casting from the casting mould. The technical result of the invention: the paint is resistant to the action of the high pressures and temperatures during the operation of the pressurized casting on the inside, the image stencil printed by the paint has the stable color after long-term action of the atmospheric conditions.

EFFECT: the invention ensures, that the paint is resistant to the action of the high pressures and temperatures during the operation of the pressurized casting on the inside, the image stencil printed by the paint has the stable color after the long-term action of the atmospheric conditions.

6 cl, 1 tbl

 

The invention relates to paint, suitable for printing inside pressed castings, consisting mainly of one or more pigments, optionally, conventional auxiliary substances, and a binder dissolved in an organic solvent or mixture of organic solvents.

Ink for screen printing and ink for screen printing are widely used. For example, a film of transparent plastics can be printed on their reverse side of the ink for screen printing. The printed film is then formed and cast their backs in the form for molding (pressed casting). For example, can be made with a wide variety of plastic parts, such as various image printed or colored, interchangeable cases for cell phones. Requirements, imposed on quality of screen printing are simple, as in the operation of molding the inner side of the required resistance to temperatures in the region of 260°C and pressures of about 1000 bar, and there should be no violations of the printed image during the period of use.

German patent application DE 4421561 A1 describes a flexible, heat-resistant ink for screen printing. That which is revealed as a binder for the pig is having is a thermoplastic aromatic polycarbonates, dissolved in conventional solvents. The typical opaque compositions gives the opportunity to obtain a high-contrast print color models. On the contrary, the printed color models obtained with polyacrylate binder, are blurred.

It was found that the ink for screen printing and ink for screen printing on the basis of polycarbonate compounds for printing on the back side of the film, which is processed to moulded castings, in subsequent operation of the molding from the inside is not always stable with regard to the operation of the molding from the inside, and also have more or less tendency to turn yellow after some time and in accordance with loads on them.

The obvious task is to create a paint that is suitable for screen printing inside pressed castings, which are relatively stable with respect to the operation of the molding with the wrong side against imprinted her image and which demonstrates an extremely high color stability even after prolonged exposure to atmospheric conditions.

This problem is solved by ink suitable for printing films of transparent thermoplastics, especially for printed films used for pressed castings, comprising, in foundations of the Ohm, from

a) one or more pigments,

b) a binder in solution in

C) an organic solvent or mixture of organic solvents

d) conventional auxiliary substances, if they are desirable

characterized in that is used as a binder of poly(meth)-acrylate or poly(meth)-acrylamide compound, which has a softening temperature in Vic VST (ISO 306)at least 115°C.

Paint

Paint consists of

a) one or more pigments, preferably in the range from 10 to 50 mass%

b) a binder, preferably in the range from 10 to 50% by mass, in solution in

C) an organic solvent or mixture of organic solvents, and

g) if desired, conventional auxiliary substances, preferably in an amount up to 10% by weight, especially from 0.1 to 10% by weight,

and all quantities are relative to liquid paint.

Pigments

Paint contains pigments, preferably in the range from 10 to 50%, more preferably from 15 to 30% by weight relative to the liquid paint.

Examples of suitable pigments include carbon black, titanium dioxide, metal pigments, red iron oxide or iron oxide red marks, cobalt pigments, for example, the brand cobalt blue, mark green Rinman, and organic pigments.

Binder

Paint which engages a binder, in particular polymeric binder, preferably in the range from 10 to 50%, in particular from 15 to 35% by weight relative to the liquid paint.

As a binder, you can use poly-(meth)-acrylate or poly(meth)-acrylamide compound, which has a softening temperature in Vic VST (ISO 306)at least 115°With, for example, from 115 to 180°C, preferably at least 118°With, for example, from 118 to 125°S, more preferably at least 125°With, in particular, at least 130°With, for example, from 140 to 180°or from 145 to 160°C. These binders are very resistant to temperature and atmospheric conditions and, therefore, are valuable for the properties of the ink system.

You can use poly-(meth)-acrylate compound which is a polymer of

(M1) from 50 to 90% by weight of alkylmethacrylamide having from 1 to 6 carbon atoms in the ether radical,

(m2) from 5 to 25% by weight, of at least one vinylaromatic connection

(m3) from 1 to 25% by weight of maleic anhydride and, if desired,

(M4) from 0 to 5% by weight of alkylacrylate having from 1 to 6 carbon atoms in the ether radical

The monomers (M1), (m2), (m3) and (M4).

The monomers (M1), used in quantities of from 50 to 90% by weight relative to the weight of all monomers selected from the group altimetry is the ATA, having from 1 to 6 carbon atoms in the ether radicals, such as ethyl methacrylate, propylbetaine, isopropylacetate, butylmethacrylate, isobutylacetate, tert-butylmethacrylate, intermetallic, isoperimetrical, vexillarius, 2,2-dimethylbutylamino, cyclopentylmethyl, cyclohexylmethyl, and especially preferred, for example, methyl methacrylate.

The monomers (m2) are selected from the group vinylaromatic compounds, such as α-halogenation, p-methylsterol, p-tert-butalbiral, vinylnaphthalene, and preferably α-methylsterol, and particularly preferably styrene.

The monomer of maleic anhydride (m3) is used with a purity of at least 95%, preferably at least 99%. In order to convert the maleic anhydride in the liquid aggregate state, it is heated above its melting point 52,85°C, preferably to temperatures between 55 and 80°more preferably, between 60 and 80°C. At temperatures above that of liquid maleic anhydride can be stored in an atmosphere of inert gas for many weeks.

Alkylacrylate (M4) can be included in a proportion of up to 5% by weight to improve the rheological properties of ternary copolymers of the vehicle. Examples of alkylacrylate having from 1 to 6 carbon atoms in the ether radical, are acrylate, isopropylacetate, propylacetate, Isobe is ylacrylic, tert-butyl acrylate, pentylaniline, hexidecimal, and preferably, butyl acrylate, and particularly preferably methyl acrylate.

The monomers (M1), (m2) and (M4) and their mixtures are liquid under the conditions of mixing.

Corresponding copolymers can be obtained in the usual way radical polymerization. European patent application EP-A 264590 describes, for example, a method of obtaining a molding compound from a mixture of monomers comprising methyl methacrylate, vinylaromatic compound, maleic anhydride and, if desired, the lower alkylacrylate, and the polymerization is carried out to a conversion of 50% in the presence or in the absence of the polymerized organic solvent and continuing the polymerization of the above conversion, at least 50% in the temperature range from 75 to 150°in the presence of an organic solvent until the conversion of at least 80%, and then evaporated low molecular weight volatile components.

Japanese application JP-A 60-147417 describes a method of obtaining polymethacrylate molding compounds of high heat resistance, in which a mixture of monomers of methyl methacrylate, maleic anhydride and at least one vinylaromatic connections served at a temperature of from 100 to 180°in the polymerization reactor suitable for polymerization in solution or in bulk, and conduct polymerization. German application n the patent DE-A 4440219 describes the further production process.

Suitable binders include poly(meth)-acrylate compounds, which consist, for example, from 90 to 100% by weight of units of methyl methacrylate and which due to the specific process of obtaining reach temperatures of softening by Vika VST (ISO 306)at least 115°With, preferably, from 116 to 122°C. European patent application EP-A 245647 describes, for example, a method of obtaining a molded poly-(meth)-acrylate compounds by emulsion polymerization at temperatures of polymerization of from 0 to 100°With, for example, from 20 to 90°With, in the presence of initiator and regulator in respect of at least 1:2, preferably 1:5 or higher. Injection molding a poly(meth)-acrylate compounds, thus obtained, have a fraction of tact from syndiotactic triads more than 60%, while the isotactic fraction is preferably less than 5%. The magnitude of the destruction temperature of the molding compositions (depolymerization 2% at heating rate 5°C/min) is preferably at least 290°C. the softening Temperature by Vika VST (ISO 306) are in the range from 115 to 122°C. Accordingly, the resulting polymers can be composed of from 90 to 100% by weight of units of methyl methacrylate. In a fraction of from 0 to 10%, preferably from 0 to 5%, especially from 0 to 2% by weight is possible, where appropriate, the presence of freely is adecline of the polymerized comonomers, such as, for example, methyl acrylate, acrylate, Methacrylonitrile, maleic acid, maleic anhydride, methacrylic esters or methacrylamide, styrene, p-methylsterol, complex, vinyl ester or vinylamide.

The next way to obtain a poly(meth)-acrylate compounds, which consist, for example, from 90 to 100% by weight of units of methyl methacrylate and reach temperatures of softening by Vika VST (ISO 306)at least 115°known as "anionic polymerization in the presence of complex catalysts (see, for example, Elias H.G. (1996): Polymere; Von Monomeren und Makromolekulen zu Werkstoffen, Hüthig &Wepf). This method, however, is very complex, and to date is not actually used in practice.

As a binder, it is also possible to use poly-(meth)-acrylamide connection received partial or full limitirovanie polymers alilovic esters of methacrylic acid by reaction with imagereadym agent (see, for example, European patent application EP-A 441148 or EP-A 666161). Preferred poly(meth)-acrylamides compounds having a degree of limitirovaniya (contents of glutarimide) from 50 to 100%, preferably from 60 to 95%, in particular from 65 to 80% by weight. When the degrees of limitirovaniya below 100% poly-(meth)-acrylamide connections usually include as by-products of the process limitirovaniya other with the suits, such as methacrylic acid and methacrylic anhydride in amounts, for example, in each case from 1 to 15% by weight,

Methods of obtaining these polymethacrylimide known from European patent applications EP-A 216505, EP-A 666161 or from European patent application EP-A 776910.

Solvents

Suitable solvents are halogenated or, preferably, halogen-free aliphatic, cycloaliphatic and aromatic hydrocarbons, ketones, esters, ethers, alcohols or phenols, in which the aforementioned binder is easily dissolved.

Examples of suitable solvents include toluene, xylene, tetrahydrofuran, ketones, such as acetone, methyl isobutyl ketone, isophorone, butanone, methyl ethyl ketone, esters such as methyl acetate, ethyl acetate, butyl acetate, butylphosphonate, methoxypropylacetate, alcohols, such as methanol, ethanol or isopropanol, and halogenated hydrocarbons like chloroform, methylene chloride and chlorobenzene.

Suitable, for example, a mixture of methyl ethyl ketone and alcohols, for example ethanol, isopropanol and/or butanol.

Preference is given to mixtures of xylene, methyl ethyl ketone, butyl acetate, ethoxylated alcohols, such as ethoxymethyl and/or methoxybenzylamine (Butoxyl®), and the mixture can include, as suitable, a small proportion of solvent is a solvent-naphtha (technical benzene or heavy benzene, a mixture of 50 to 70% of cumene from 30 to 40% of xylene and 2 to 7% of naphthalene oil.

Particular preference is given to mixtures of two to three parts by weight of xylene, approximately one part by weight of methyl ethyl ketone, approximately one part by weight of butyl acetate, approximately one part by weight of ethoxylated alcohol, such as ethoxymethyl and one part by weight of methoxybenzylamine (Butoxyl®) and about half parts by weight of a solvent, the solvent-naphtha (technical benzene or heavy benzene, a mixture of Chemical Abstracts from 60% cumene, 35% of xylene and 5% naphthalene oil).

Excipients

The paint can, where appropriate, to include conventional excipients, preferably, in an amount up to 15% by weight, especially from 0.1 to 10% by weight. Examples of conventional auxiliary substances used in paints include activators staining or UV stabilizers and/or UV absorbers of radiation, fillers, if they desired, moisturizing agents and preservatives.

Improved stability of the coating in accordance with the invention to the effect of atmospheric factors reaches through the inclusion of UV stabilizers such, which are known as additives to polymers and are listed in (Ullmanns Enzyklopedie der technischen Chemie, 4th Edition, Volume 15, pages 253 to 260, and/or successfully using the polymerase is ishemic UV stabilizers. As an example, the polymerized UV stabilizers may be mentioned 3-(2-benzotriazolyl)-2-hydroxy-5-tert-activeselectionset. Absorbers of UV radiation may be present, for example, in amounts from 0.1 to 10% by weight relative to the solids of the paint.

Pressed casting/process

In the process of getting pressed castings using film of transparent and translucent polymers, printed on the reverse side of the ink for screen printing. The printed film is formed and the apparatus for casting under pressure, strengthen them with the back of the molding with a wrong side thermoplastics, receiving relatively thick pressed casting.

Film

The film, which is suitable for printing on the reverse side, can be obtained, for example, from a thermoplastic, preferably a transparent thermoplastic, such as polystyrene, polycarbonate, polyethylene terephthalate or poly (methyl methacrylate), for example, preferably, the impact-resistant polymethyl methacrylate. Suitable, for example, poly(meth)acrylates, comprising from 80 to 99.9% by weight of methyl methacrylate and 0.1 to 20% by weight of other comonomers. Examples of suitable comonomers include esters of methacrylic acid (for example, ethyl methacrylate, butylmethacrylate, vexillarius, cyclohexylmethyl), esters of acrylic is Oh acid (for example, a methyl acrylate, an acrylate, butyl acrylate, hexidecimal, cyclohexylacetate) or styrene and derivatives of styrene, such as, for example, α-methylsterol or p-methylsterol.

The impact resistance modifiers for polymethacrylate polymers are well known. As for impact modifiers for poly(meth)acrylates can be used sewn single-layer or multi-layer emulsion polymers consisting of, for example, stitched polybutylene. Obtaining and shockproof structure polymethacrylate molding compositions are described, for example, in European patent applications EP-A 0113924, EP-A 0522351, EP-A 04655049 and EP-A 0683028.

The thickness of the films may be, for example, from 10 to 500 μm, preferably from 50 to 300 μm. The printed film is an intermediate product for the respective pressed castings.

Operation printing

Film print in the usual way in the process of screen printing (see, for example: E. Schulz. Ein lehrreiches Fachseminar in Stuttgart: Bedrucken von Kunststoffen, Verpackungs-Rundschau 11/1985, pp.1262-1270 or W. Krause "Siebdruck auf Kunststoffen, Entwicklungstendenzen", Plastverarbeiter, No.9, 1981, pp.1249-1251).

The operation of the molding from the inside/process

The process of obtaining pressed castings includes the following stages,

A. The printing film of thermoplastic in the process of screen printing paint,

B. Forming films, such as the er, the molding process under high pressure. In this process the film is set in the holder, for example to the mounting device, and molded at a temperature which may be between room temperature, i.e. from about 20°and a temperature below the softening temperature by Vika (VST, as defined in ISO 306, method B), under pressure, through, for example, compressed air at a pressure of, for example, from 50 to 300 bar. A process of this type is known, for example, from European patent application EP-A 0371425.

C. Casting under pressure from the inside on the printed film with the printed side in the form for molding a thermoplastic, and

G. removing the pressed casting from the mold.

The printed film is placed in a mold for injection molding so that printed was facing the nozzle, and cast under pressure with the inner side of thermoplastic layer thickness of, for example, from 0.5 to 10 mm, preferably from 0.5 to 2 mm Can be used, for example, a casting mold with a heated sprue with a needle valve sprue. Examples of thermoplastic resins suitable for injection molding from the inside, include polycarbonate, blends of polycarbonate and a copolymer of Acrylonitrile, butadiene and styrene (ABS), block-copolymers, Acrylonitrile-styrene-Acrylonitrile (ASA) and, preferably, poly (methyl methacrylate).

Suitable, e.g. the measures poly(meth)acrylates, comprising from 80 to 99.9% by weight of methyl methacrylate and 0.1 to 20% by weight of other comonomers. Examples of suitable comonomers include, for example, esters of methacrylic acid (for example, ethyl methacrylate, butylmethacrylate, vexillarius, cyclohexylmethyl), esters of acrylic acid (e.g. methyl acrylate, acrylate, butyl acrylate, hexidecimal, cyclohexylacetate) or styrene and derivatives of styrene, such as α-methylsterol or p-methylsterol.

Particular preference is given to polymetylmetacrylate, which are copolymers of from 98 to 95% by weight of methyl methacrylate and from 2 to 5% by weight of methyl acrylate with an average molecular weight (srednevekovoy; measured by thin layer chromatography or determined by GPC) in the range of from 100,000 to 200,000, preferably from 100,000 to 130,000. Particularly suitable, for example, injection molding composition which is a copolymer of 97% by weight of methyl methacrylate and 3% by weight of methyl acrylate and has an average molecular weight of approximately 110000.

Suitable temperature molds are in the range from 40 to 80°C, preferably from 55 to 65°C. the melt Temperature, especially in the case of a copolymer of polymethyl methacrylate, may be in the range from 220 to 300°preferably from 240 to 260°C. Temperature ebohr the basis of casting moulds can be in the range from 220 to 300° C, preferably from 240 to 260°C. the Rate of injection can vary from low to high.

Pressed castings

After finished the operation of the molding from the inside out, cold pressed casting can be removed from the moulds.

Pressed casting in accordance with the invention consists of a film from a thermoplastic, preferably a transparent thermoplastic, in particular, films of a copolymer of polymethyl methacrylate, which is printed on the reverse side of the paint in accordance with the invention and which is provided on this side of the coating layer from a thermoplastic, which preferably is a poly (methyl methacrylate), and the specified layer caused by the operation of the molding from the inside.

Use

Pressed casting in accordance with the invention can find many applications: for example, as covers devices - covers, for example, electronic devices, mobile phones (cell phones), display with backlight, for example, for instruments or, for example, as colored lights, for example, indicator lamps or gas discharge lamps, for example, in motor vehicles, rail transport or aviation.

Advantageous effects of this invention

Paint in accordance with the invention gives the advantage that it ostoich the VA to high pressures and temperatures during the operation of molding from the inside, to produce the pressed casting. In addition, even after long period of usage pressed castings, the printed image shows no visible discoloration or yellowing. Pressed casting in accordance with the invention, especially if the material of the outer films and/or cast from the inside of the coating is a copolymer of polymethylmethacrylate, are remarkable for high transparency and stability to the action of atmospheric conditions. Pressed castings produced in accordance with this invention, therefore, meet the stringent quality requirements so imposed, for example, displays with backlight or lamp for the sphere cars or aircraft.

Examples

The usual commercial film from impact-resistant polymethyl methacrylate was printed on one side different colors for screen printing (inks 1 to 3) and then cast on the wrong side on the printed side of the polymer polymethylmethacrylate and secured in such a way as to obtain the pressed casting (test items). The test items are then tested to destruction print washing.

The thickness of the films used was 250 μm. Films were cast under pressure from the inside with (MT) and without () before drying screen printing.

Paint 1 (according to the accordance with the invention):

Paint 1 consists of a mixture of solvents, including

40% by volume of xylene,

17% by volume of methyl ethyl ketone,

17% by volume of methoxybenzylamine (Butoxyl®)

17% by volume of butyl acetate and

9% by volume solvent-naphtha

(technical benzene or heavy benzene, a mixture of approximately 60% of cumene, 35% of xylene and 5% naphthalene oil), and contains a relatively wet paint 10% by weight of carbon black pigment and 20% by weight of a binder which is a copolymer of 65% by weight of methyl methacrylate, 20% by weight of styrene and 15% by weight of maleic anhydride. The softening temperature of the binder by Vika, VST, as defined in ISO 306, lies in the range of from 119 to 123°C.

Paint 2 (in accordance with the invention):

The composition corresponds to the ink 1 except that the binder is present in the form of a copolymer of polymethacrylimide consisting of polymethylmethacrylate with a degree of limitirovaniya approximately 70%. The copolymer also includes approximately 4 to 6% by weight of methacrylic acid and about 4 to 6% by weight of methacrylic anhydride as comonomers. The softening temperature of the binder by Vika, VST, as defined in ISO 306, lies in the range from 143 to 152°C.

Paint 3 (comparative experiment)

The composition corresponds to the ink 1 except that the binder used is a about icny commercial polycarbonate.

The conditions of the experiment.

Used a casting mold with a heated sprue with a needle valve sprue. The cavity had a 100×100 mm with four different levels of height 1, 2, 3 and 4 mm (speed bowl).

The printed film was cut to size and placed in a casting mold so that the point of the press have been directed toward the nozzle.

Injection molding the fit was performed in four different conditions from a to G, where a is the most stringent requirement for the stability of screen printing, and G the least restrictive.

Injection molding from the inside served molding composition consisting of polymethyl methacrylate (copolymer of 97% by weight of methyl methacrylate and 3% by weight of the methyl acrylate with an average molecular weight of about 110000 measured by thin layer chromatography or determined by the GPC method) (see table 1).

Table 1
The condition of the experimentThe temperature of the melt (°)The temperature of the molds (°)The temperature of the heated sprue (°)Injection
And26060265low
B26060265 high
In28060280high
G28060280low

High speed injection = 100% of the possible performance of the installation.

Low speed injection = approximately 25% of the possible performance of the installation.

Pressed castings were removed from moulds and evaluate the leaching of screen printing, in each case visually, using the assessment system for removal of the printed image by leaching.

Score ++: no noticeable washout

Assessment +: in fact, without noticeable washout

Assessment: strong washout

A series of experiments and their results are shown in table 2.

Table 2
The conditions of the experimentAndBInG
Paint 1 (MT)++++++
Paint 1 (FROM)+++++
Paint 2 (MT)++++++
Paint 2 (FROM)+++++
Paint 3 (MT)/td> +++-

MT = the printed films were dried at 80°C for 30 minutes before the operation of the molding from the inside.

FROM = printed films were not dried before the operation of the molding from the inside.

1. Paint, suitable for printing on films of transparent thermoplastic, consisting mainly of

a) one or more pigments,

b) a binder in solution,

C) an organic solvent or mixture of organic solvents,

g) customary auxiliaries, if desired,

characterized in that the binder used is a copolymer of poly(meth)-acrylate, containing

(M1) from 50 to 90% by weight of alkylmethacrylamide having from 1 to 6 carbon atoms in the ether radical,

(m2) from 5 to 25% by weight, of at least one vinylaromatic connection

(m3) from 1 to 25% by weight of maleic anhydride and, if desired,

(M4) from 0 to 5% by weight of alkylacrylate having from 1 to 6 carbon atoms in the ether radical;

or

the copolymer poly-(meth)-acrylamide containing polymethylmethacrylate with a degree of limitirovaniya from 65 to 80%,

from 1 to 15 wt.% methacrylic acid and

from 1 to 15 wt.% methacrylic anhydride,

moreover pointed to by the second copolymer has a softening temperature in Vic (ISO 306), at least 115°C.

2. Paint according to claim 1, characterized in that as solvents use aliphatic, cycloaliphatic and aromatic hydrocarbons, ketones, esters, ethers, alcohols, phenols or mixtures thereof.

3. Film from a thermoplastic, characterized in that its print ink according to claim 1 or 2.

4. Pressed casting consisting of a film of thermoplastic printed on the reverse side of the dye according to claim 1 or 2, and is provided on this side of the coating layer from a thermoplastic, and the specified layer caused by the operation of the molding from the inside.

5. Pressed casting according to claim 4, characterized in that the foil and/or plastic for the operation of the molding from the inside is a copolymer of polymethylmethacrylate.

6. Method for the production of moulded castings, characterized by stages

a) printing film from a thermoplastic process of screen printing ink according to claim 1 or 2, and

b) forming a film

C) injection molding the inner side on the printed film with the printed side injection in the form of a thermoplastic and

g) remove the pressed casting from moulds.



 

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14 cl, 6 ex

FIELD: dyes.

SUBSTANCE: invention relates to composition of aqueous dye used in stenciling, to a method for preparing indicated composition of stenciling, using indicated dying composition for stenciling and to securities printed using indicated dying composition. Invention describes composition of aqueous dye for stenciling containing the following components: (a) emulsion of acrylic or urethane-acrylic copolymer taken in the amount 30-70 wt-%, preferably in the amount 35-60 wt.-%, and more preferably in the amount 40-55 wt.-% of self-cross-linking emulsion of acrylic or urethane-acrylic copolymer as measured for the total mass of composition; (b) cross-linking agent taken in the amount 0.25-3 wt.-%, preferably in the amount 0.5-2 wt.-%, and more preferably in the amount 1-2 wt.-% of mass indicated cross-linking agent as measured for the total mass of composition; (c) optional catalyst; (d) optional pigments, and (e) optional additives and wherein indicated cross-linking agent comprises at least two different functional activity in a single molecule. The first functional activity is chosen by so manner to form a covalent bond with indicated polymer before printing and the second of indicated functional activities is chosen by so manner to carry out cross-linking indicated polymer for hardening printed dye. Emulsion of acrylic or urethane-acrylic copolymer is chosen from group possessing self-cross-linking property and wherein the composition shows pH from 7.0 to 8.5, preferably from 7.5 to 8.3 and more preferably from 7.5 to 8.0. Invention describes a method for preparing above said composition of aqueous dye for stenciling and comprising the following steps: (a) preparing emulsion of acrylic or urethane-acrylic copolymer; (b) optional preparing catalyst, optional pigments and optional additives; (c) preparing a cross-linking agent able to form a covalent bond under the first conditions with polymer prepared in (a), and cross-linking prepared polymer under the second conditions; (d) thorough mixing components prepared by points (a), (b) and (c) and providing interaction of polymer prepared by point (a) with a cross-linking agent prepared by point (c) under indicated first conditions; (e) regulation of pH value of the composition in the range from 7.0 to 8.5. Also, invention describes using the indicated composition of aqueous dye as a dye for stenciling and security document with signs printed by using indicated composition of aqueous dye. Proposed composition shows improved stability and improved toxicological properties in the combination and excellent stability of printed and hardened dye to chemical and physical effects.

EFFECT: improved properties of dye, improved preparing method.

14 cl, 6 ex

FIELD: printing arts; printing inks for securities; protection against falsification.

SUBSTANCE: proposed printing ink contains pigment possessing protective properties, binder and thinner; pigment contains ultra-dispersed powder of rare-earth ferrite-garnet selected from group including Y3Fe5O12, Ln3Fe5O12, YxLn3-xFe5O12, where Ln is rare-earth element, 0≤x≤3, Y3-xBixFe5O12, where 0≤x≤2 with sizes of crystallites not exceeding 100 nm in the amount not exceeding 85% of weight of ink. Optical characteristics are extended within 380-750 nm and infrared transparence is increased within 0.74-3.0 mcm.

EFFECT: enhanced identification due to magnetic properties.

8 dwg, 1 tbl, 3 ex

FIELD: manufacture of polymeric building materials.

SUBSTANCE: running-track and playing ground coverings are manufactured by depositing mixture of rubber crumb and isocyanate prepolymer-based composition, in which process rubber crumb is preliminarily mixed with water and further isocyanate prepolymer-based composition is added, said composition being made up of, wt parts: isocyanate prepolymer 100, polymethylene-polyphenylisocyanate 25-46, glycerol 8-11, catalyst 0.01-0.10, and water 0.6-1.5.

EFFECT: simplified technology and improved sports and technical characteristics of covering.

1 tbl

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 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 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: dyes.

SUBSTANCE: invention relates typography dyes, in particular, to dye for deep printing. Invention describes dye for deep printing comprising the first binding agent chosen from group of water-soluble or water-diluted acrylate oligomers, photoinitiating agent and, optionally, a monomer as the second binding agent chosen from group consisting of water-soluble or water-diluted monomers of polyethylene diacrylates or polyethoxylated triacrylates used for correction of the composition dye viscosity value. Dye can comprise additives, such as pigments, filling agents, photosensitizing agents, photostabilizing agents and special pigments. Dyes shows viscosity value from 7 to 60 Pa . s at temperature 40°C and dispersed completely in aqueous washing off solution with sodium hydroxide in the concentration from 0 to 0.5 wt.-%. Dyes possesses the excellent capacity for paint removing and it is can be precipitated from the indicated washing off solution.

EFFECT: improved and valuable properties of dye.

28 cl, 9 ex

FIELD: paint and varnish materials.

SUBSTANCE: invention relates to water-diluting paint and varnish covers preparing by the electrolytic precipitation method on cathode and can be used in preparing protective covers. The composition comprises the following components, mas. p. p.: 60-70% solution of epoxyamino-rubber adduct modified with melamine-formaldehyde resin and neutralized partially with formic acid in the mixture of ethylglycol acetate and butanol, 190-210; acetic acid, 2-16; mixture of epoxydiane resin of molecular mass 350-600 Da and the content of epoxy groups 14.5-24.8% with xylene taken in the ratio = 4:1-18-22, mixture of fluoroplastic F-4D suspension with distilled water taken in the ratio = 1:6-800-1600. Covers made of the proposed composition are stable against temperature drops, hydrogen and saline mist.

EFFECT: improved and valuable properties of composition.

1 tbl

FIELD: compositions for fluoro-polymer coats.

SUBSTANCE: proposed composition contains separate particles of fluoro-polymer having polymer hydrophilic macro-moleculars connected to them by high energy treatment. Proposed invention refers also to method of treatment of fluoro-polymer, method of treatment of fluoro-polymer particle surfaces, method of imparting property of wetted surface to particles of inert polymer powder and method of modification of molecular mass of fluoro-polymer particles. This method makes it possible to change chemical functional groups of particle surface, thus changing the characteristics of particle surface. These characteristics enhance suitability of particles and make them highly dispersible even in water.

EFFECT: enhanced efficiency.

28 cl, 5 tbl, 7 ex

FIELD: ecology; methods of environmental protection.

SUBSTANCE: the invention is pertaining to methods of environmental protection, in particular, to the method of effectivization of localization of the porous surfaces polluted by radioactive substances. The invention presents the method of effectivization of localization of the porous surfaces polluted by the radioactive substances ensuring deposition of the film-forming substances on the porous surfaces polluted by radioactive substances. Before deposition of the film-forming substances on the subjected to localization porous surfaces contaminated by the radioactive substances they are wetted with water or a surfactant solution to increase the thickness of the applied localizing film. Advantages of the invention consist in the increased efficiency of localization of the radioactive contaminations. The invention ensures increased efficiency of localization of the radioactive contaminations.

EFFECT: the invention ensures increased efficiency of localization of the radioactive contaminations.

2 tbl, 2 ex

The invention relates to hydrophilic processing of films made from styrene resins, and the use of modifiers to improve, for example, antistatic properties and sliding properties (slipperiness) films
The invention relates to the field of engineering and is intended for use in the manufacture of products made of organic glass

The invention relates to methods for polymer composite materials on the basis of polydimethylsiloxane rubber, not having in its composition of active groups, and can be used to produce films, thin-film and bulk products in mechanical engineering, electrical engineering, medical, food and other industries

The invention relates to methods of modifying contacting structural elements and environments with the use of fluoride-containing organic substances, in particular to methods for creating high-molecular films on contact surfaces of structural elements and interact with environments, and can find application in technical systems operating in conditions of dry friction or depleted of lubricant for the processing of cutting and punching tools, saturation of polymeric media of different fillers while ensuring their traditional processing methods
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