Polymer colouring agents, coating compositions and thermographic offset plates

FIELD: chemistry.

SUBSTANCE: the invention relates to polymer colouring agents used in coating compositions to protect the image forming layer of the offset plates. Described are a new water-soluble polymer colouring agent with the absorption band ranging from about 300 nm to about 600 nm, and a coating composition for a thermographic offset plate which comprises: (a) the said polymer colouring agent with the absorption band ranging from about 300 nm to about 600 nm, and (b) organic microparticles which contain cross-linked copolymers of acrylate ot methylacrylate and styrole, 2-hydroxymethylacrylate, methacrylate, poly(oxyethylene)methacrylate or a linear or branched alkylmethacrylate; or inorganic nanoparticles containing silicone oxide or aluminium oxide. Described is the thermographic offset plate for reverse printing, containing (a) water receptive plate, (b) a layer positioned on the plate which forms the image in the near-infrared region, and (c) the coating layer which is positioned on the image-forming layer and contains the said coating composition.

EFFECT: reduction or elimination of background filling of the offset plates in the conditions of white light, elimination of the need to use separating paper when packaging offset plates.

7 cl, 10 dwg, 13 ex

 

The technical field to which the invention relates.

The present invention relates to polymeric dyes, coating compositions and thermal offset printing forms. More precisely, the present invention relates to polymeric dyes containing these dyes coating compositions for the protection of the image forming layer of thermal offset printing plates. The present invention also relates to a thermal offset plates containing the coating composition.

Background of invention

Thermal offset printing plates is known from the prior art. For example, in patents US 6124425 and 6177182 described printing plates for the positive and negative up with is sensitive to the emission layer through which the laser radiation in the near infrared region can be formed image, show an aqueous-alkaline developers.

In patents US 6994327 and 6899994 described thermal offset printing plates for negative up with the bottom of the hydrophilic polymer layer and sensitive to the radiation forming the image layer. The images on these forms can be formed by laser radiation in the near infrared region and can occur during operation of the printing machine with ink and viagrausa solutions.

Also known thermographic offset printing plate having a coating layer. For example, in patents US 6482571 and 6541183 described thermal offset form for negative copy with sensitive to radiation of a lower layer and an optional water-soluble coating layer of polyvinyl alcohol. This optional cover layer is transparent and is not sensitive to light. The images on these forms can be formed by laser radiation in the near infrared region and can occur during operation of the printing machine with ink and dampening solution.

In the patent US 6846614 described thermal offset printing plates for negative copy with sensitive radiation layer and the water-soluble coating layer, which is prepared from a mixture of polyvinyl alcohol and polyvinylimidazole. This optional cover layer is transparent and is not sensitive to light. The images on these forms can be formed by laser radiation in the near infrared region and can occur during operation of the printing machine with ink and dampening solution.

Thus, the prior art generally known thermal offset printing plates for negative copy with a layer sensitive to laser radiation the structure near infrared range. This image forming layer usually contains absorbing near infrared radiation compounds, initiators (radical or cationic) and a binder polymer, and may also contain reactive oligomers, dyes, etc., These forms may have a top layer that normally protects the layers sensitive to laser radiation near infrared range (image forming layer) from oxygen and/or moisture and thus prevents staining of the background and decrease the speed of image formation, which usually cause these substances in unprotected printed forms.

However, the initiators which are commonly used in image forming layers are salt iodone, salt sulfone, triazine compounds, etc. is Well known that these initiators sensitive to white light. Essentially, these initiators react with white light, which creates a lot of difficulties, such as the (often strong) staining of the background. This means that it is impossible to handling forms or processing of natural light. To partially overcome this difficulty, form is usually use when the "yellow light", i.e. white light, which filtered to remove frequencies below about 550 nm.

Another disadvantage of the prior art printed forms are also decided the flax by the fact that when transporting and storing it is usually placed on each other. Because the coverage of these forms are soft and sticky, each of the printing plates must be padded protective cushioning paper to prevent scratching and adhesion of coatings to each other. This is disadvantageous because of the cushioning paper increases the cost and must be manually deleted before the formation of the image (which further increases costs). If the paper is not removed, it will be stuck in used printing machines devices for installation forms, automatically loading the form.

Thus, a need remains in advanced printed forms, which can be accessed at the white light and which does not require the use of gasket paper.

This document mentions a number of documents, the contents of which are by reference in its entirety included in this description.

Background of invention

The present invention is the task of creating a coating composition for thermographic offset printing plates, which allows to produce the covering layer for these forms, so that these forms can be treated and treat them in terms of white light, and was not required cushioning paper for their packaging and transportation.

Also proposed thermal offset printing form for negative copy containing hydrophilic substrate, forming images in the near infrared region of the layer located on the hydrophilic substrate, and a coating layer located on the image forming layer, when the coating layer contains a water-soluble polymeric dye with an absorption band in the range of from about 300 to 600 nm, and microparticles or nanoparticles.

Finally, a water-soluble polymeric dye with an absorption band in the range of from about 300 to 600 nm.

In one embodiment, the implementation of this polymeric dye designed for use in top layer thermal offset printing form.

In embodiments of the invention, the absorption band can be in the range from about 300 to about 550 nm. More precisely, it can be in the range from about 300 to about 500 nm, or from about 300 to about 480 nm.

In variants of the invention, the polymeric dye may contain as attached side groups ALRC shall acetel or arylamino dye.

In embodiments, the implementation of the polymeric dye may have the following formula:

,

in which a and C are independently of each vary from about 0.05 to about 0,95; b ranges from about 0.00 to about 0,50; d ranges from about 0.02 to about 0,20, R means hydrogen or methyl; R1 means hydrogen, a hydroxyl group (hydroxy), CNS group (alkoxy), alkyl (alkyl), halide (halide or carboxylic acid, and M stands for a carboxylic acid, 1-imidazole, 2-pyrrolidone, polyoxyethylene chain, sulfonic acid or phosphoric acid; a Q1, Q2, Q3and Q4have the same or different size and mean chromophore with a specific absorption band.

More precisely, one of the chromophores Q1, Q2, Q3and Q4can have the formula:

In embodiments, the implementation of a coating composition and printing plate coating composition and the coating layer may contain inorganic nanoparticles. More precisely, in the variants of implementation of neorganics is their nanoparticles may represent a silicon oxide, aluminum oxide, zirconium oxide or zinc oxide. In even more specific embodiments, the implementation of the inorganic nanoparticles may have a size of less than about 80 nm.

In embodiments, the implementation of a coating composition and printing plate coating composition and the coating layer may contain organic microparticles. More precisely, in the variants of implementation of the organic microparticles can be a cross-linked copolymers of acrylate or methacrylate and styrene, 2-hydroxyethylmethacrylate, methacrylate, poly(oksietilenom)methacrylate, or a linear or branched alkylmethacrylamide.

In even more specific embodiments, the implementation of the organic particles may have a size from about 2 to about 8 μm (microns).

In embodiments, the implementation of a coating composition coating composition may further contain an aqueous solvent.

In variants of the implementation of the printing plate image forming layer may contain absorbing near infrared radiation polymer nanoparticles and reactive oligomers iodone. In even more specific embodiments, the implementation of the image forming layer may additionally contain reactive polymer binder.

Detailed description of the invention

Top songs

Let us consider in more detail the present invention in which the proposed coating composition for thermographic offset printing plates. When applied to the printing form this coating composition creates a coating layer, which allows (1) to handle the form when white light and at the same time to weaken or mainly to eliminate background staining and (2) packaging and transport forms without the use of packing paper. In addition, this coating layer acts as impervious to oxygen and moisture protective layer and thereby prevents staining of the background under the action of O2and H2Oh, and also decrease the speed of laser imaging, which typically occurs when unprotected forms.

More precisely, the proposed invention the coating composition contains (A) water-soluble polymeric dye with an absorption band in the range of from about 300 to 600 nm and (C) microparticles or nanoparticles.

In specific embodiments, the implementation of water-soluble polymeric dye may have an absorption band in the range of from about 300 to about 550 nm, from about 300 to about 500 nm, or from about 300 to about 480 nm.

The authors first created a coating composition comprising water-soluble polymeric dye with an absorption band in the range of from about 300 to 600 nm. After applying this polymeric dye comprising a coating layer on the printed form it absorbs light in the range of harmful radiation, not allowing him to access igat image forming layer, in which it causes undesirable staining of the background. In addition, in contrast to molecular dyes this polymeric dye is stable and is not divided into phases or move/diffuses inside the top layer and/or other layers of the printed form. Finally, this polymeric dye provides an effective barrier against the O2and H2O.

Polymeric dye is water soluble, meaning it dissolves water. More precisely, in the variants of implementation of the water-soluble polymeric dye has a solubility in water of at least 50 mg/ml

In the context of the present description polymeric dye means a polymer that absorbs light waves of one or more predetermined lengths. For example, the polymer may have one or more absorption bands (also called absorption peaks in the range from about 300 to 600 nm. To this end, the polymer may contain one or more chromophores. These chromophores can enter into the structure of the main polymer chain or may be attached as side groups to the structure of the main chain.

In the context of the present description, the "chromophore" means neprimerno molecule that has one or more absorption bands (also called absorption peaks) in a certain range of wavelengths. More precisely, XP is motor may have at least one absorption band in the range of from about 300 to 600 nm.

The chromophore may be any chromophore with one or more absorption bands in any wavelength range, well-known specialists in this field of technology. In variants of the implementation of the chromophore may be an azo dye or arylamino dye.

In the context of the present description "azo dye" is adopted in the technique of value. More precisely, "azo dye" can mean the chromophore containing functional isogroup, i.e. two connected double bond of the nitrogen atom: R-N=N-R'. In variants of the implementation of the groups R and R' are aromatic, which helps to stabilize the group N=N by its inclusion in an extended delocalized system.

In the context of the present description "arylamino dye has adopted the technique of value. More precisely, "arylamino dye" can mean the chromophore containing arylamino group, i.e. aryl group that is attached to the nitrogen atom: aryl-N(R1)(R2), where R1 and R2 independently of one another denote hydrogen, alkyl or aryl. In embodiments implementing the alkyl can be linear, branched or cyclic C1-C12, and aryl can contain from 5 to 12 carbon atoms.

In embodiments, the implementation of water-soluble polymeric dye may have the formula:

,

W is:

a and C denote molar ratio, which can independently from each other to vary from about 0.05 to about 0.95,and

b means molar ratio, which can vary from about 0.00 to about 0.50 in,

d means molar ratio, which can vary from about 0.02 to about 0,20;

R means hydrogen or methyl,

R1 means hydrogen, a hydroxyl group, CNS group, alkyl, halide, or carboxylic acid,

M means a carboxylic acid, 1-imidazole, 2-pyrrolidone, polyoxyethylene chain, sulfonic acid or phosphoric acid and

Q1, Q2, Q3and Q4independently from each other mean a chromophore with the above-mentioned absorption band.

In these formulas, "b" may be equal to zero, which means that the average of these formulas (the part in brackets, in which "b" is a coefficient) is optional. So, in the variants of implementation in the aforementioned chemical structures this middle part may be missing.

In embodiments, the implementation of the CNS group and the alkyl may contain from 1 to 12 carbon atoms. In variants of the implementation of the halide may also be F, Cl, Br or I.

In the context of the present description "polyoxyethylene chain" means -(CH2-CH2-O-)n-. Options exercise value "n" can be up to about 50.

In the e chromophores Q 1, Q2, Q3and Q4can be the same or different from each other. In preferred embodiments, the implement may be used a mixture of chromophores with defined absorption bands of wavelengths, so that the surface layer was absorbed over a wide part of the spectrum and, therefore, could not reach the image forming layer. Similarly, in embodiments implementing the coating composition may contain a mixture of polymeric dyes.

It is implied that although in the above chemical structures shown only two different chromophore in each polymeric dye, in fact, polymeric dyes may contain chromophores more than two different types, and these polymeric dyes are also included in the scope of the present invention.

Options exercise of any of the chromophores Q1, Q2, Q3and/or Q4can be azo dyes and arylamine dyes with the following formula (in which the maxima of the absorption bands in brackets):

Modified disperse orange 3 (443 nm),

Disperse red 1 (503 nm),

Modified disperse red 13 (517 nm),

Modificar the bath disperse yellow 9 (359 nm),

Modified direct red 81 (508 nm),

As stated above, the proposed invention the coating composition comprises microparticles or nanoparticles. The inventors were the first to create the coating composition containing such particles. The authors found that due to the presence of these particles within the coating layer increases the hardness of the coating layer and thereby improves its resistance to scratching and reduces the stickiness that makes excessive cushioning paper during packaging and storage.

In the context of the present description "microparticles" refers to a particle size of from about 0.1 to about 20 μm, and "nanoparticle" means a particle size of from about 10 to about 100 nm.

Options exercise of the coating composition may contain a mixture of microparticles and/or nanoparticles.

The exact nature of the particles used in the coating composition, is almost irrelevant. Thus, the particles contained in the coating composition may be inorganic particles or organic substances. More precisely, in the variants of implementation of the particles can be an inorganic nanoparticles or organic microparticles.

In embodiments implementing reorgan the ical nanoparticles can be composed of metal oxide, such as silicon oxide, aluminum oxide, zirconium oxide and zinc oxide. In specific embodiments, the implementation of these particles can have a size of less than about 80 nm. In even more specific embodiments, the implementation of the inorganic nanoparticles are preferably can be represented as:

NameDescription and manufacturer
AERODISP® W440Nanoparticles of silicon oxide (40% solids) in water dispersion bone coal produced by the company Degussa, USA
ADP50Nanoparticles of aluminum oxide of high purity (<50 nm) production company Forever Chemical, Taiwan
Nanopore-
shock TiO2
Particles smaller than 40 nm, the production company Hefei Jiankun Chemical, China

In embodiments, the implementation of the organic microparticles may be polymeric. More precisely, organic microparticles can be a cross-linked copolymers of acrylate or methacrylate with styrene, 2-hydroxy ethyl methacrylate, methacrylate, poly(oksietilenom) methacrylate, and other linear or branched alkylmethacrylamide. In embodiments implementing a linear or branched altimet kilat may contain from about 2 to about 20 carbon atoms. In specific embodiments, the implementation of these particles can have a size of from 2 to 8 μm. In even more specific embodiments, the implementation of the organic microparticles may constitute microparticles produced by American Dye Source, Inc. (Canada) under the trade names Thermolak(R) NP02 (organic particles of copolymers of methyl methacrylate with a size of about 2 µm) and Thermolak (R) NP08 (organic particles of copolymers of methyl methacrylate with a size of about 8 μm).

Options exercise of the coating composition may further contain an aqueous solvent, such as, for example, water, more accurately deionized water.

In embodiments, the implementation of a coating composition, an aqueous solvent may contain from about 1 to about 15% by weight of dry matter (i.e. polymeric colorant microparticles and/or nanoparticles). In the variants of implementation as solids in the coating composition may contain from about 80 to about 98% by weight of polymeric dye and from about 2 to about 20% by weight of the microparticles and/or nanoparticles.

Thermal offset printing plates

The present invention additionally relates to thermographic offset printing forms for negative copy, containing (A) a hydrophilic substrate, (B) forming the image in the near infrared region of the layer located on gerofi Inoi substrate, and (C) coating layer located on the image forming layer, when the coating layer contains a water-soluble polymeric dye with an absorption band in the range of from about 300 to 600 nm and microparticles or nanoparticles.

More precisely, in the coating layer contains a polymeric dye, microparticles and nanoparticles, as described in the description of the coating composition. In embodiments implementing the covering layer can be made of the above-described coating composition by (1) adding an aqueous solvent in the coating composition when the coating composition contains no solvent, (2) placement of a coating composition for forming the image layer and (3) evaporation of the solvent, to thereby obtain a coating layer containing a water-soluble polymeric dye with an absorption band in the range of from about 300 to 600 nm and microparticles or nanoparticles.

Hydrophilic substrate used in printed form, may be any substrate known to specialists in this field of technology. Not limiting the invention, examples of the substrate include anodized aluminum, foil, plastic or paper.

The aluminum substrate may be made of sprayed brushed aluminum or electrolytic granulated aluminum, which is then anodize acidic solution. The substrate is C anodized aluminum can be subjected to subsequent treatment with aqueous solutions, containing poly(acrylic acid), copoly(calvinistically acid) or polyvinylformal acid, and then dried at a temperature of about 110°C.

In the variants of implementation, the substrate can have a polyester coating of the hydrophilic layer containing silicon oxide, aluminum oxide or titanium oxide, made from polymers, such as polyvinyl alcohol and copolymers of polyvinylacetate.

Forming the image in the near infrared (NIR) region layer is a layer which is sensitive to near infrared laser radiation. After exposure to near-infrared radiation to areas of this layer they undergo chemical physical changes and thereby record the image. After developing, get the image from which you can print copies. Forms may occur during operation of the printing machine (when not exposed areas of the layer are removed using paint and moisturizing solutions) or without using a printing machine (using an aqueous-alkaline developer to remove the exposed portions of the layer). Forming the image layer can be any layer, well-known specialists in this field of technology. Typically, image forming layers contain chromophore near-infrared region, an initiator and a reactive polymer bound is relevant. They can also contain sensitizers, dyes, stabilizers, protecting images substances, and other substances.

Forming the image in the near infrared region of the layer located on the hydrophilic substrate. However, it is understood that in embodiments of the implement between the substrate and forming the image layer may be one or more layers.

Options exercise of the image forming layer can weigh from about 0.30 to about 2.50 g/m2.

Options exercise of forming images in the near infrared region of the layer is the one described in patent application US 60/823415, filed August 26, 2006, the contents of which are by reference incorporated into the present description. This form images in the near-infrared region absorbing layer contains a near-infrared radiation polymer nanoparticles and reactive oligomers iodone. This image forming layer may also contain reactive polymeric binder, pigments, stabilizers, sensitizers, etc. In even more specific embodiments, the implementation of absorbing near-infrared radiation by polymeric nanoparticles of this image forming nanoparticles are sold by American Dye Source, Inc. (Canada) p is d trade name Thermolak(R) NIP830. These particles have a strong absorption band in the range from 780 to 840 nm and the average size of 260 nm. Chemical structure Thermolak(R) NIP830 shown in figure 1, where w represents the number of repeating units of ethylene oxide, of about 50, with a, k, h, and I is equal 0,100, 0,750, 0,145 and 0.005, respectively.

In other specific embodiments, the implementation of the reactive oligomer iodone this image forming layer is an oligomer sold by American Dye Source, Inc. (Canada) under the trade name Tuxedo(R) 06C051 D. This reactive oligomer ladonia is a mixture of compounds shown in figure 2, 3 and 4, where w represents the number of repeating units of ethylene oxide, of about 7.

In other specific embodiments, the implementation of a reactive polymeric binder of this image forming layer is a product sold by American Dye Source, Inc. under the trade name Tuxedo(R) XAP 02. This reactive polymer binder is acetylcellulose containing side radical reactive functional group of the methacrylate. Chemical structure Tuxedo(R) XAP 02 shown in figure 5.

The covering layer is to form the image in the near infrared region of the layer. However, it is understood that in embodiments implementing IU the remote image forming layer and a top layer may be one or more of the other layers.

The covering layer filters white light in the range of harmful radiation, but transparent to radiation in the near infrared region, so the image on the image forming layer can be formed during the printing process.

After imaging the covering layer are removed during development (simultaneously with the non-exposed areas forming the image layer). Thus, the coating layer must have sufficient solubility in water to remove water-alkaline developer or a fountain solution. This is possible because, as described above, the polymeric dye used in the coating composition, soluble in water. You do not want microparticles and nanoparticles coating compositions were soluble in water because they are dispersed in an aqueous-alkaline developer or a fountain solution. Essentially, when applying the coating composition using an aqueous solvent microparticles and nanoparticles in the optimal case should be insoluble in an aqueous solvent to remain in the form of particles when in the deposited layer.

In addition, variants of implementation of the image forming layer is soluble in the solvent (unlike solubility in water), therefore, it is preferable that the covering layer is deposited using water dissolve the El in order to avoid the use of other solvents, can damage the image forming layer.

Options exercise of the coating layer can weigh from about 0.30 to about 2.50 g/m2.

Options exercise of the coating layer may contain from about 80 to about 98% by weight of polymeric dye and from about 2 to about 20% by weight of the microparticles and/or nanoparticles.

Polymeric dyes

The present invention also relates to polymeric dyes described above with respect to the coating composition. For exactly these polymeric dyes will be described again later.

Proposed water-soluble polymeric dye with an absorption band in the range of from about 300 to 600 nm.

In specific embodiments, the implementation of water-soluble polymeric dye may have an absorption band in the range of from about 300 to about 550 nm, from about 300 to about 500 nm, or from about 300 to about 480 nm.

This polymeric dye contained in the coating layer. printed on the printing form, absorbs light in the range of harmful radiation, not allowing him to reach the image forming layer, in which it causes undesirable staining of the background. In contrast to molecular dyes this polymeric dye is stable and is not divided into phases or move/diffuses inside the top layer and/or other layers of the printed form. Finally, the one polymeric dye provides an effective barrier against the O 2and H2O.

Polymeric dye is water-soluble, meaning it dissolves water. More precisely, in the variants of implementation of the water-soluble polymeric dye has a solubility in water of at least 50 mg/ml

And in this case in the context of the present description polymeric dye means a polymer that absorbs light in a wave of one or more predetermined lengths. For example, the polymer may have one or more absorption bands (also called absorption peaks in the range from about 300 to 600 nm. To this end, the polymer may contain one or more chromophores. These chromophores can enter into the structure of the main polymer chain or may be attached to the structure of the main chain as side groups.

And in this case in the context of the present description, the "chromophore" means neprimerno molecule that has one or more absorption bands (also called absorption peaks) in a certain range of wavelengths. More precisely, the chromophore can have at least one absorption band in the range of from about 300 to 600 nm.

The chromophore may be any chromophore having one or more absorption bands in any wavelength range, well-known specialists in this field of technology. In variants of the implementation of the chromophore may be an azo dye and the and arylamino dye.

And in this case in the context of the present description "azo dye" is adopted in the technique of value. More precisely, under the "azo dye" may be a chromophore containing functional isogroup, i.e. two connected double bond of the nitrogen atom: R-N=N-R'. In variants of the implementation of the groups R and R' are aromatic, which helps to stabilize the group N=N by its inclusion in an extended delocalized system.

And in this case in the context of the present description "arylamino dye has adopted the technique of value. More precisely, under "alluminuim dye" may be a chromophore containing arylamino group, i.e. aryl group that is attached to the nitrogen atom: aryl-N(R1)(R2), in which R1and R2independently of one another denote hydrogen, alkyl or aryl. In embodiments implementing the alkyl can be linear, branched or cyclic C1-C12, and aryl can contain from 5 to 12 carbon atoms.

In embodiments, the implementation of water-soluble polymeric dye may have the following formula:

or

,

in which: a and C means molar ratio, which independently of each other can vary from about 0.05 to about 0,95; b means molar ratio, which can change the SJ in the range from about 0.00 to about 0,50; d means molar ratio, which can vary from about 0.02 to about 0.2; R means hydrogen or methyl; R1 means hydrogen, a hydroxyl group, CNS group, alkyl, halide, or carboxylic acid, and M stands for a carboxylic acid, 1-imidazole, 2-pyrrolidone, polyoxyethylene chain, sulfonic acid or phosphoric acid, a Q1, Q2, Q3and Q4independently from each other mean a chromophore with the above absorption band.

In these formulas, "b" may be equal to zero, which means that the average of these formulas (the part in brackets, in which "b" is a coefficient) is optional. So, in the variants of implementation in the aforementioned chemical structures this middle part may be missing. In embodiments, the implementation of the CNS group and the alkyl may contain from 1 to 12 carbon atoms. In variants of the implementation of the halide may also be F, Cl, Br or I. in this case, in the context of the present description "polyoxyethylene chain" means -(CH2-CH2-O-)n-. In embodiments, the implementation of "n" can be up to about 50.

All chromophores Q1, Q2, Q3and Q4can be the same or different from each other. In preferred embodiments, the implement may be used a mixture of chromophores with defined absorption bands of waves of different DL is n with that, to top layer was absorbed over a wide part of the spectrum and, therefore, could not reach the image forming layer.

It is implied that although in the above chemical structures shown only two different chromophore in each polymeric dye, in fact, polymeric dyes may contain chromophores more than two different types, and these polymeric dyes are also included in the scope of the present invention.

Options exercise of any of the chromophores Q1, Q2, Q3and/or Q4can be azo dyes and arylamine dyes with the following formula (in which the maxima of the absorption bands in brackets):

Modified disperse orange 3 (443 nm),

Disperse red 1 (503 nm),

Modified disperse red 13 (517 nm),

Modified disperse yellow 9 (359 nm),

Modified direct red 81 (508 nm),

In the context of the present description, "about" means plus or minus 5% from the specified value.

Other tasks, becoming the VA and characteristics of the present invention will become clearer after reading the following non-limiting description of specific variants of its implementation, which is given only as an example with reference to the accompanying drawings.

Brief description of drawings

On the attached drawings:

figure 1 schematically shows the chemical structure Thermolak(R) NIP830,

figure 2 shows one of the components of the reactive oligomer iodone sold under the trade name Tuxedo(R) 06C051 D,

figure 3 shows one of the components of the reactive oligomer iodone sold under the trade name Tuxedo(R) 06C051 D,

figure 4 shows one of the components of the reactive oligomer iodone sold under the trade name Tuxedo(R) 06C051 D,

figure 5 shows the chemical structure Tuxedo(R) XAP02,

figure 6 shows the ideal chemical structure PD1-01,

7 shows the ideal chemical structure PD1-02,

on Fig shows the ideal chemical structure PD1-03,

figure 9 shows the ideal chemical structure PD2-01 and

figure 10 shows the ideal chemical structure PD2-02.

Description of illustrative embodiments

The present invention will be further illustrated by the following non limiting examples.

Obtaining water-soluble polymeric dyes

Water-soluble polymeric dyes synthesized in a three-neck flask with mechanical stirrer, condenser water, heating the casing is m, the temperature controller inlet for gaseous nitrogen. The molecular weight of the obtained polymers were measured by the method of system gel permeation chromatography (model Breeze production company Waters, Canada). By using a spectrophotometer UV and visible region (model Lambda 35, production company Perkin Elmer, Canada) was determined by ultraviolet and visible region of polymeric dyes in aqueous solution.

To obtain water-soluble polymeric colorants used the following materials:

The monomerAcrylic acid1
1-vinylimidazole1
1-vinyl-2-pyrrolidone
PolymerCelvol 103: polyvinyl alcohol (98% hydrolyzed polyvinyl acetate with an average molecular weight of about 18,000
The monomer visible dyesDisperse red 1 acrylate1
Disperse red 13 acrylate1
Direct red 81 methacrylate
The visible chromophore dyesDNAB: 4-(2,4-dinitro the Nilin)benzaldehyde 2
Disperse yellow 91
Disperse orange 3
1production company Sigma-Aldrich, Canada
2manufactured by American Dye Source, Inc., Canada.

Example 1

In a three-neck flask was synthesized water-soluble polymeric dye PD1-01 by adding up 84.7 grams (0,9 mol) of 1-vinylimidazole and 3,68 g (0,1 mole) of disperse red 1 acrylate dye in 700 ml of deionized water. The solution was heated to 80°C and within 30 minutes was kept in nitrogen atmosphere. Under stirring was added 10 grams of a water suspension of 2,2'-azobis(2-methylpropionamidine)dichlorhydrate (which was acting as a free radical initiator) and delegirovali solution for 1 hour. Then added 5 grams of 2,2'-azobis(2-methylpropionamidine) dichlorhydrate and also delegirovali solution for 1 hour. Finally, added 5 grams of 2,2'-azobis(2-methylpropionamidine)dichlorhydrate and 10 hours withstood the solution heated to 80°C.

Got a reddish solution of polymer dye and using deionized water increased the dry matter content of 10%. The resulting polymer dye having the band maximum absorption at a frequency of about 503 nm. The resulting product was ready to use for preparation of the coating solutions. Chemical structure PD1-01 shown in Fig.6, where a and C equal to 0.1 and 0.9, respectively.

Example 2

In a three-neck flask was synthesized water-soluble polymeric dye PD1-02 by adding to 100.0 grams (0,9 mol) of 1-vinyl-2-pyrrolidone and 4.0 grams (0,1 mole) of disperse red 13 acrylate dye in 700 ml of deionized water. The solution was heated to 80°C and within 30 minutes was kept in nitrogen atmosphere. Under stirring was added 10 grams of a water suspension of 2,2'-azobis(2-methylpropionamidine)dichlorhydrate and delegirovali solution for 1 hour. Then to the solution was added 5 grams of 2,2'-azobis(2-methylpropionamidine)dichlorhydrate and also delegirovali solution for 1 hour. Finally, added 5 grams of 2,2'-azobis(2-methylpropionamidine)dichlorhydrate and 10 hours withstood the solution heated to 80°C.

Got a reddish solution of polymer dye and using deionized water increased the dry matter content of 10%. The resulting polymer dye had a band maximum absorption at a frequency of about 517 nm. The resulting product was ready to use for preparation of the coating solutions. Chemical structure PD1-02 shown in Fig.7, where a and b equal to 0,1i 0,9, respectively.

Example 3

In a three-neck flask was synthesized water-soluble polymeric dye PD1-03 by adding to 64.8 grams of (0.95 mole) of acrylic acid and 4.2 grams (0.05 m) direct red 81 methacrylate dye in 700 ml of deionized water. The solution was heated to 80°C and within 30 minutes was kept in nitrogen atmosphere. Under stirring was added 10 grams of a water suspension of 2,2'-azobis(2-methylpropionamidine)dichlorhydrate and delegirovali solution for 1 hour. Then to the solution was added 5 grams of 2,2'-azobis(2-methylpropionamidine)dichlorhydrate and also delegirovali solution for 1 hour. Finally, added 5 grams of 2,2'-azobis(2-methylpropionamidine)dichlorhydrate and 10 hours withstood the solution heated to 80°C.

Got a reddish solution of polymer dye and using deionized water increased the dry matter content of 10%. The resulting polymer dye had a band maximum absorption at a frequency of about 508 nm. The resulting product was ready to use for preparation of the coating solutions. Chemical structure PD1-03 shown in Fig, where a and b are equal to 0.05 and 0.95, respectively.

Example 4

In reactive vial 220 ml of dimethyl sulfoxide (DMSO), heated to 60°C., added 44 grams Celvor()103 Yves at which osphere nitrogen with constant stirring synthesized water-soluble polymeric dye PD2-01. After complete dissolution of the polymer in DMSO in the flask was added 2.0 ml of concentrated sulfuric acid, which acted as a catalyst for the reaction. After 30 minutes, the flask was slowly added 2,03 gram DNAB (50 mmol) and within 5 hours to alter the mixture at 60°C. the Polymer was besieged in acetone, filtered, and abundantly washed with a mixture of acetone and ethanol prior to bleaching filtrate.

After air drying received brownish polymer dye. The ideal structure of PD2-01 is shown in Fig.9, where a, C and d is equal to 0.20, and 0.02 to 0.78, respectively.

Example 5

In reactive vial 220 ml of dimethyl sulfoxide (DMSO), heated to 60°C., added 44 grams Celvor()103 and in nitrogen atmosphere with constant stirring synthesized water-soluble polymeric dye PD2-02. After complete dissolution of the polymer in DMSO in the flask was added 2.0 ml of concentrated sulfuric acid, which acted as a catalyst for the reaction. After 30 minutes, the flask was slowly added 4.8 grams of 4-carboxyanhydride (100 mmol, manufactured by American Dye Source Inc., Canada) and for 5 hours to alter the mixture at 60°C. In the reaction flask set a trap Dina. Then the reaction mixture is slowly added 80 ml of toluene, 2.8 grams of disperse orange dye 3 and 1.6 grams of disperse yellow what about the dye 9. The reaction mixture was heated to 110°C, resulting as a by-product in the trap Dina formed water. The reaction was stopped after 10 hours after the cessation of water formation during the reaction. The polymer was besieged in acetone, filtered, and abundantly washed with a mixture of acetone and ethanol prior to bleaching filtrate.

After air drying received brownish polymer dye. The ideal structure of PD2-02 is shown in figure 10, where a, b, C and d equal 0,10,0,10, 0,78 and 0.02, respectively.

Obtaining water-soluble coating solutions

To obtain coating compositions, slowly dissolved mentioned polymeric dye in deionized water using a stirrer with large shear forces (model L4RT-A production company Silverson, USA) and added organic or inorganic particles for the formation of course the variance. The dry matter content (i.e. polymer dye particles in the coating compositions brought up to about 10% by weight.

In addition to the polymeric dyes obtained in the previous examples, to obtain coating compositions used the following substances:

The nanoparticles or microparticlesAERODISP® W 440 nanoparticles of silicon oxide (40% solids in water) in aq is th dispersion bone charcoal 1
Thermolak® NP08 - organic particles of copolymers of methyl methacrylate (size of about 8 μm)2
The nanopowder ADP50 - nanoparticles of aluminum oxide of high purity (<50 nm)3
Water-soluble polymerCelvol®
Polyvinylimidazole (10% solids in aqueous solution)2
1production company Degussa, USA;
2manufactured by American Dye Source, Inc., Canada;
3production company Forever Chemical Co., Taiwan.

Examples 6-11

Received six of the coating compositions according to the present invention. These compositions contain water, polymeric dyes, and organic or inorganic microparticles or nanoparticles.

More precisely, these compositions contained the following substances:

IngredientsExamples (parts)
678910 11
Divisioona water707070707070
PD2-018,08,08,0000
PD2-020008,08,08,0
PD2-012020202000
PD2-020000200
PD2-030000020
AERODISP® W4401,00 01,01,01,0
ADP5000,40000
Thermolak® NP08000,4000

Examples 12 and 13 (comparative)

For comparison were obtained polymer coating compositions which do not contain polymeric dyes or particles. These coating compositions were similar to the compositions known from the prior art, and, more precisely, contained the following substances:

IngredientsExamples (parts)
1213
Divisioona water7070
Celvol® 103810
Polyvinylimidazole200

Obtaining solution for coating, forming the image by means of laser radiation in the near infrared region

To obtain the layer forming the image by means of laser radiation in the near infrared region, used the following materials:

Polymer particles that are sensitive to near infrared radiationThermolak® NIP830
(20% solids in an aqueous solution of propanol)1
Reactive celluloseTuxedo® XAP02
(10% solids in 1,3-dioxolane)1
The mixture of the reactive oligomers iodoneTuxedo® 06051D
(85% dry matter in 1,3-dioxolane)1
Stabilizer3-mercaptothiazole1
Blue 5033-(2-ethoxy-4-diethylaminophenyl)-3-(1-ethyl-2-methylindol-3-yl)phtalic3
SurfactantBYK 3364
1manufactured by American Dye Source, Inc.. Canada;
2production company Sigma-Aldrich, Canada;
3production company Yamamoto Chemicals Inc., Japan;
4production company BYK Chimie, USA.

Using the above ingredients received the composition forming the image by means of laser radiation in the near infrared region of the coating thermal offset printing plates for negative copy. More precisely, the liquid components of the solution for coating contained 90% by weight n-propanol, or 9.8% by weight of deionized water and 0.2% by weight surfactant BYK 336. The resulting solution for coating usually had a total solids content of about 7.0 percent by weight, as listed in the following table:

td align="left"> 0,20
IngredientsWeight (parts)
Thermolak® NIP83022.5
Tuxedo® XAP025,00
Tuxedo® 06051Dand 5.30
3-mercaptothiazole
Blue 5030,30

Manufacturer of thermal offset printing plates

Thermal offset printing plate produced as follows. First, using a wound wire rod caused the said solution on an aluminum substrate, to obtain a form image by means of laser radiation in the near infrared region of the coating, and then within 2 minutes, dried in a drying channel furnace at a temperature of 95°C. Dry weight forming images in the near infrared region of the layer brought to about 1.0 g/m2.

Then layer each form that generates an image by laser radiation in the near infrared region, using a wound wire rod has struck one of the water-soluble solutions to obtain a layer of the coating compositions of Examples 6-13. Forms coated with the surface layer within 5 minutes and dried in channel a drying oven at a temperature of 95°C. the Dry weight of the coating layer was about 1.0 g/m2.

Characteristics of printed forms

Technological properties when white light and the strength of adhesion

To explore the technological properties of the white light of different made above thermographic forms, printed forms with different pokrovs the mi layers at different time were placed under two fluorescent lamps (model F32WT8 manufactured by Philips), situated at a distance of about 1 m Then form showed by using an aqueous solution containing 50% by weight 956 Developer (an aqueous-alkaline developer for printing forms for negative copy of the production company, Kodak, USA). After that assessed the degree of staining under the action of white light.

To test the adhesion strength of the coating layer to form on the coating layer caused the tape and pulled it to tear. To evaluate the obtained results were used categories "poor", "satisfactory". "good" and "excellent", while the "bad" meant that in isolation tape layer loose almost all areas, which caused the tape, and "excellent" meant. when isolation tape layer loose or almost loose in the area which caused the tape.

The following results were obtained in these two tests:

The covering layerGripBackground
Example 6PerfectlyClean after 8 hours
Example 7PerfectlyClean after 8 hours
Example 8Ho is Osho Clean after 8 hours
Example 9GoodClean after 8 hours
Example 10GoodClean after 8 hours
Example 11SatisfactoryClean after 8 hours
Comparative example 12PerfectlyTurned in 3 hours
Comparative example 13BadStrongly stained in 3 hours

As can be seen from this table, 8-hour exposure to white light for thermal offset printing plates according to the invention (Examples 6-11) did not cause staining of the background. In contrast, the printed forms containing coating layers of comparative examples 12 and 13, already at 3-hour exposure to fluorescent light occurred (strong) staining of the background.

From this table also shows that the adhesive strength of a coating layer of Examples 6-11 is in the range from excellent to satisfactory. The strength of adhesion of a coating layer of Example 13, which contains only the polyvinyl alcohol is very bad. Essentially, when removing the adhesive tape layer loose almost all of the plot on which it has been applied. In addition, the coating layer was peeled off at the cut edges of the form.

Packing without packing paper

It was made by one hundred (100) samples of each of the described thermal offset printing plates (Examples 6-13). Shaped folded stack without the use of packing paper between them. These stacks of 100 forms Packed in cardboard boxes and within 1 month stored at 25°C. the Boxes were opened and examined forms.

Printing plates of Examples 12 and 13 were badly scratched and slightly stuck together with each other. This explains why up to the present time in the packaging thermal offset forms, it was necessary to use packing paper. In contrast to this form of Examples 6-11 do not scratch, and none of them stuck with the other. This clearly proves that these forms can be packaged without the use of packing paper.

Experimental laser forming images in the near infrared region and printing

On thermal offset printing forms from Examples 6-11 were formed image by irradiation with an intensity of 150 MJ/cm2using the device for the forms (PlateRite 4300S, the production company Screen, USA) the press AB Dick. After making 25 cycles with all forms were obtained printed image of good quality on paper.

The influence of humidity

To investigate the influence of humidity on each of thermal offset printing plates of Examples 6-13, form the coating was placed in an oven with a temperature of 40°C and relative humidity 80%. The forms are then expressed using an aqueous solution containing 50% by weight of the developer Developer 956. The following results were obtained with this test:

The covering layerBackground
Example 6Clean after 5 days
Example 7Clean after 5 days
Example 8Clean after 5 days
Example 9Clean after 5 days
Example 10Clean after 5 days
Example 11Clean after 5 days
Example 12Clean after 5 days
Example 13Clean after 5 days
Without pokrovnik the layer Turned in 3 days

Forms without the cover layer already after 3 days of being in the furnace showed a strong staining of the background. Thermal offset printing plates of Examples 6-13 had a clean background after 5 days of being in a furnace at a temperature of 40°C and relative humidity of 80%. This clearly proves that the covering layer according to the invention (Examples 6-11) protects the image forming layer is from About2and H2Oh, and as known from the prior art coating layers.

Although the present invention has been described through specific variants of its implementation, it can be improved within the essence and scope of the invention described in the appended claims.

1. The coating composition for thermographic offset printing plate, comprising:
(a) a water-soluble polymeric dye with an absorption band in the range of from about 300 to about 600 nm; and
(b) organic microparticles containing cross-linked copolymers of acrylate or methacrylate and styrene, 2-hydroxyethylmethacrylate, methacrylate, poly(oksietilenom)methacrylate, or a linear or branched alkylmethacrylamide,
or inorganic nanoparticles containing silicon oxide or aluminum oxide,
these polymeric dye has the formula:
,
in which a and C are independently of each vary from about 0.05 to about 0,95; b ranges from about 0.00 to about 0,50; d ranges from about 0.02 to about 0,20, R means hydrogen or methyl; R1 means hydrogen; M means the residue of carboxylic acid, 1-imidazole or 2-pyrrolidone; a Q1, Q2, Q3and Q4have the same or different size and mean azo - or arylamino the chromophore with the aforementioned absorption band.

2. The coating composition according to claim 1, in which said absorption band is in the range from about 300 to about 480 nm.

3. The coating composition according to claim 1, in which one of Q1, Q2, Q3and Q4has the formula:



or

4. The coating composition according to claim 1, in which the mentioned inorganic nanoparticles have a size of less than about 80 nm.

5. The coating composition according to claim 1, in which the aforementioned organic microparticles have a size of from about 2 to about 8 microns.

6. Thermal offset printing form for negative copy, containing:
(a) a hydrophilic substrate;
b) forming the image in the near infrared region layer, located on the hydrophilic substrate; and
(C) coating layer located on the image forming layer,
in fact the top layer is made using the coating composition according to any one of claims 1-5.

7. Water-soluble polymeric dye with an absorption band in the range of from about 300 to about 600 nm, having the formula:
or

in which a and C are independently of each vary from about 0.05 to about 0,95; b ranges from about 0.00 to about 0,50; d ranges from about 0.02 to about 0,20, R means hydrogen or methyl; R1 means hydrogen; M means the residue of carboxylic acid, 1-imidazole, 2-pyrrolidone; a Q1, Q2, Q3and Q4have the same or different size and mean



or



 

Same patents:

FIELD: chemistry.

SUBSTANCE: nanosized silicon with particle size of 5-100 nm is added as a light stabiliser to the recipe of the composition during mixture or synthesis of ingredients thereof. In the surface layer, particles contain silicon dioxide in amount of 0.25-2.5 wt %, having stable spectral absorption of medium-wave UV radiation in the 200-420 nm range. This effect is retained at high temperatures of approximately up to 650 K.

EFFECT: obtaining coatings which do not change colour and operational properties and retain colour- and weather resistance.

2 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: invention discloses polymer particles with size between 60 nm and 1000 nm and containing a polymer which contains a hydrophobic backbone chain formed by at least one segment which absorbs near-infrared radiation, bonded with chloroform which absorbs near-infrared radiation, having an absorption peak between 700 and 1100 nm; and at least one segment which is transparent for near-infrared radiation. The invention also discloses a method of producing said particles, a coating composition containing said polymer particles and a reactive iodonium oligomer, as well as a negative lithographic offset printing plate which contains a substrate, a hydrophilic bottom layer and a laser-developed top layer, where the laser-developed top layer contains said polymer particles.

EFFECT: disclosed particles enable to obtain coatings which ensure sufficient runability and machine developability of negative lithographic offset printing plates.

32 cl, 35 dwg, 4 tbl, 23 ex

Protective coating // 2427601

FIELD: physics.

SUBSTANCE: protective coating has a base consisting of two layers of intertwined rows of threads attached by radiotransparent material, with a film of hydrogenated carbon ingrained with particles of ferromagnetic material is deposited on each layer through vacuum sputtering. On the surface of the film which is deposited on the outer layer of the intertwined rows of threads, there is a lacquer coating obtained from a suspension which contains a fluorinated polymer, zinc sulphide with a hexagonal crystal structure, selenium, sulphur, a catalyst, a wetting agent and a curing agent.

EFFECT: high efficiency of radio absorption and concealment in optical-location infrared band and on laser points of the optical band.

9 cl, 1 dwg, 2 tbl, 14 ex

FIELD: chemistry.

SUBSTANCE: composition contains two liquid components which are combined before applying the composition on the surface of the article. The first component is an epoxy resin hardener and the second is an epoxy resin based composition which contains (in wt %) two dispersed electroconductive filler materials different on the form of particles (graphite 50-70 and carbon fibre 1-5) 0.2-1, thermoplastic polyurethane 0.2-1, epoxy resin - the rest up to 100.

EFFECT: invention enables to lower microwave radiation.

2 cl, 1 dwg, 4 tbl, 4 ex

FIELD: chemistry.

SUBSTANCE: invention relates to formulation and technology of applying electromagnetic wave absorbing coatings on metal or rubber surfaces. The coating for absorbing electromagnetic energy of radar signals in the wavelength range of 1-20 cm is used to lower effective reflecting power of metal and rubber surfaces of ground-based and sea objects (tanks, artillery mounts, ships) for antiradar masking from attack by weapons flying towards a target guided by a radar signal (missiles, artillery projectiles, aeroplanes) based on a composition which contains binder in form of chlorosulphonated polyethylene CSPE-MR which can absorb large amounts of electromagnetic energy and is dissolved in toluene. Also dispersed in the solution is 3-20 mm long carbon fibre on which an insulating coating is deposited, curing agents and a component with large volume of air pockets - micro-glass spheres. The composition contains chlorosulphonated polyethylene CSPE-MR, toluene, magnesium oxide (MgO), zinc oxide (ZnO), polyethylene glycol PEG-35 or monoalkylphenol ether of polyethylene glycol OP-7 or OP-10, diphenylguanidine, micro-glass spheres MSO-A9, carbon fibre UKN-300, used in the composition for a 1st coating layer; carbon fibre Uglen R-9 used in the composition for a 2nd coating layer; steorox-6. The first layer based on the said composition is deposited on metal or rubber surfaces primed with a primer based on glyptal resin in order to increase adhesion by spraying a thickness of up to 2.8-3.2 mm (providing approximately 20-22 passages) and holding after each passage at 15 - 35°C for not less than 15 minutes and drying after applying the 1st layer at 15-35°C for not less than 24 hours or at 65 - 75°C for 3-4 hours. A 2nd layer of the same composition is deposited on top of the 1st layer, where carbon fibre Uglen R-9 is used instead of carbon fibre UKN-300, with total thickness of not less than 5.5 mm (approximately 18-20 passages) with holding and drying similar to those used when depositing the 1st layer.

EFFECT: low effective reflecting power of metal and rubber surfaces of ground-based and sea objects (tanks, artillery mounts, ships) for their antiradar masking from attack by weapons flying towards a target guided by a radar signal (missiles, artillery projectiles, aeroplanes).

1 ex

FIELD: physics.

SUBSTANCE: element is characterised by at least one combination of substrate material selected from polymer, a lacquer coated substrate, fibre material, a substrate with hydraulically bound mass and/or non-woven material, containing components consisting of inorganic and/or organic light filler, hollow spaces formed in the substrate material by gases, dyes, organic pigments, inorganic pigments, inorganic and/or organic nanomaterials. The combination has thermal conductivity of not less than 0.4 [W/m·K], apparent density low of less than 1.4 g/cm3, average reflection in the 400-700 nm wavelength range of visible light less than 50% and average reflection in the 700-1000 nm wavelength range of near-infrared radiation greater than 50%.

EFFECT: low heating in the sun, lower heat output compared to conventional dark surfaces, heat insulating effect.

26 cl, 10 ex, 11 dwg

FIELD: chemistry.

SUBSTANCE: composition contains absorbing filler (80-90 pts. wt); BS-10T adhesive - solution of novalac-type polyvinylformalethylal resin in organic solvents (ethanol and ethylacetate) with addition of ethyl orthosilicate, urotropin and quinoline (26-30 pts. wt); and cyclohexanone (15-20 pts. wt). The absorbing filler used is carbonyl iron, alsifer powder, technical carbon P 803 or a dry colloidal-graphite C-1 preparation.

EFFECT: obtained composition has a wide range of operating temperature, increases attenuation of microwave signals and forms a quality coating.

1 cl, 2 tbl

FIELD: chemistry.

SUBSTANCE: invention relates to radio engineering, particularly to electromagnetic wave absorbers, including in the microwave range and can be used for ensuring electromagnetic compatibility of radio-electronic equipment, biological protection from effects of radio emissions generated by different scientific and household devices, reducing radar visibility of different objects and is aimed at reducing coefficient of reflection of electromagnetic waves and widening the frequency range of the radar absorbent material, as well as simplifying the method of making said material. When making said material, an oxide hexagonal ferrimagnetic material with a W-shape is mechanically treated in a mechanoactivator for 30-300 seconds with power density factor of 20-40 g and mixing it with epoxy resin in the following ratio, wt %: oxide hexagonal ferromagnetic material with W-shape - 70-91, epoxy resin - 9-30.

EFFECT: use of chemical methods and expensive reagents is completely avoided, the material obtained using the said method has lower coefficient of reflection and a wide frequency range and can be used for making efficient radar absorbent coatings.

2 cl, 2 tbl

FIELD: physics.

SUBSTANCE: composite material is proposed for absorbing electromagnetic waves based on magnetodielectric material, which contains polymer dielectric binder, which is a polyorganosilixane oligomer with a catalyst additive, and magnetodielectric finely dispersed filler made from iron-aluminium alloy in ratio of (87.5-88.5):(12.5-11.5) wt % respectively, with the following ratio of initial components in the composite material (wt %): polyorganosiloxane oligomer - 33.5 to 40.0; catalyst - 1.5 to 2.0; magnetodielectric finely dispersed filler - 65 to 58.

EFFECT: material has high absorption coefficient, wide range of operating frequencies and improved operational characteristics.

1 cl, 1 tbl, 1 dwg, 5 ex

FIELD: instrument making.

SUBSTANCE: invention relates to coats absorbing electromagnetic radiation. Proposed coat comprises a warp consisting of aramide high-modulus Kevlar-type fabric with absorbing film applied thereon. Various-type films are applied on every warp. One type represents sawed ferrite with nano-size clusters of Ni and Co ingrained thereto, while the second type is made from evaporated hydrogenated carbon with nano-size clusters of Ni and Co ingrained thereto. The films are evaporated onto aramide fabric on both sides. In designing the fabric structure, layers are taken to alternate so that the concentration of ferromagnetic clusters in films of adjacent layers varies from low (40 to 60% at.) to high (60 to 80% at.).

EFFECT: higher RF absorbing properties in 6 to 40 GHz range and expanded frequency range in lower SHF range band of 2 to 6 GHz.

2 cl, 3 ex, 8 dwg

FIELD: chemistry.

SUBSTANCE: packaging is suitable for sealing aluminium or polyethylene terephthalate films, as well as aluminium coated or polyethylene terephthalate coated films relative polypropylene, polystyrene or polyvinyl chloride substrates. The heat sealing system for coating consists of a film-forming dispersion of at least three different types of polymers A, B, AB and C, a system of organic solvents L containing the following mixture: L1) esters of aliphatic carboxylic acid with aliphatic alcohols and L2) aliphatic hydrocarbons. The weight ratio of L1 to L2 lies between 1 and 200 and the boiling point of the system of solvents under normal conditions is at most 105°C. Type A polymer is ethylene-propylene-diene rubber, type B polymer is a copolymer of (meth)acrylates, containing standard (meth)acrylates and a total of up to 15 wt % methacrylic acid and/or acrylic acid per type B polymer, type AB polymer is a graft polymer of type A and type B polymers and type C polymer is saturated polyester with hydroxyl number equal to 3-25 mg KOH/g.

EFFECT: heat sealing system is characterised by high heat resistance, good protective properties and short sealing time.

4 cl

FIELD: chemistry.

SUBSTANCE: invention relates to an article having at least one base (S) which has at least one polyolefin composition (C1) containing at least one non-functionalised polyolefin (PO1), wherein said base has a surface and at least one layer (Σ) covering at least one section of the surface of the said base, wherein said layer (Σ) is formed by at least one polyolefin composition (C2) which contains at least one functionalised polyolefin (POg) obtained by grafting acid and/or anhydride groups to at least one non-functionalised polyolefin (PO2), whereby said acid and/or anhydride groups are completely or partially neutralised with at least one neutralising gent, and at least one emulsifying agent.

EFFECT: article has improved surface properties, improved antistatic and electroconduction properties.

36 cl, 2 ex

FIELD: chemistry.

SUBSTANCE: present invention relates to a method of marking materials with coded microparticles. Described is a method of marking materials with coded microparticles, characterised by that the coded microparticles used are obtained (i) through polymerisation of at least one water-soluble monoethylene unsaturated monomer in the presence of at least one ethylene unsaturated monomer containing at least two double bonds in a molecule, through reverse suspension polymerisation of water in oil, where the suspension agent used is doped nanoparticles, or (ii) emulsion polymerisation of water-insoluble monoethylene unsaturated monomers containing 0-10 wt %, in terms of the mixture of monomers, of at least one ethylene unsaturated monomer containing at least two double bonds in a molecule, where the emulsifying agent for stabilising the dispersion phase is in form of doped nanoparticles, or (iii) polymerisation of at least one ethylene unsaturated monomer and a copolymerisable dye containing an ethylene unsaturated double bond and, if needed, agglomeration of these particles, where during polymerisation in accordance with (i) and (ii), nanoparticles used are radioactively doped or doped with at least one dye and one compound from the group of rare-earth elements of the periodic table. Described also are materials containing coded microparticles for marking, obtained using the described method. The invention describes use of coded microparticles obtained using the described method.

EFFECT: novel method of marking materials.

14 cl, 1 tbl, 14 ex

FIELD: chemistry.

SUBSTANCE: present invention pertains to new photochromic monomers

Alk=CH3-C10H21 X=Cl, Br, I, F, NH2, CH2OH, CH2Cl, CH2Br, CHO, CO2H, method of obtaining them, photochromic polymers- polyazomethines, which are reversibly photocontrolled due to introduction into their structure, of dihetarylenthane class photochromic fragments.

EFFECT: obtaining new photochromic photocontrolled polymers for designing new information technologies.

8 cl, 25 dwg, 15 ex

FIELD: nonferrous metallurgy industry; aircraft industry; other industries; production of the heat-resistant alloys on the basis of the nickel.

SUBSTANCE: the invention is pertaining to the dispergated coloring agents intended for the ink-jet recording. The invention describes the dispergated coloring agent containing the coloring agent and the pseudo-finely-dispergated particles of the polarizable polymer having the dimension less, than the particles of the coloring agent. In the dispergated coloring agent the coloring agent itself and the particles of the polarizable polymer are attached to each other. At that the pseudo-finely-dispergated particles of the polarizable polymer contain the interpolymer consisting of the monomeric components containing, at least, one type of the hydrophobic monomer and, at least, one type of the hydrophilic monomer, where the hydrophobic monomer contains, at least, the monomer having the methyl group in α - position and the radically-polymerizable non-saturated double bond. The invention also describes the method of production of the indicated dispergated coloring agent and the water ink produced on its basis. The presented dispergated coloring agent has the high stability for a long time and practically in the absence of the surface-active substance or the dispergator. The ink produced on its basis has stability of blowout in the ink-jet printing method.

EFFECT: the invention ensures, that the ink produced on the basis of the presented dispergated coloring agent has the high stability of blowout in the ink-jet printing method.

20 cl, 14 dwg, 7 tbl, 15 ex

FIELD: chemistry of polymers, leather industry, chemical technology.

SUBSTANCE: invention relates to a method for preparing polymeric products that are used in processes for dressing leather or fur, in treatment and disinfection of natural and sewage waters. Method for preparing polymeric products involves the hydroxymethylation reaction of polyhexamethylene guanidine chloride with formaldehyde and arylation reaction of prepared product with aromatic compound comprising o-amino- or o-hydroxy-groups. The hydroxymethylation reaction is carried out in the presence of acetic acid or formic acid up to formation of trimethylol derivative of polyhexamethylene guanidine chloride. In some cases the arylation product is subjected for complex formation with transient metal salt or azo-coupling reaction with diazonium salt taken among group including sulfanilic acid, naphthionic acid, j-naphthyls, p-nitroaniline, 2,6-dichloro-4-nitroaniline. Invention provides simplifying, accelerating and enhancing the effectiveness of process in dressing leathers with derivatives of polyhexamethylene guanidine showing tanning effect, staining properties, flocculating capacity and high antibacterial activity.

EFFECT: improved preparing method.

3 cl, 1 tbl, 9 ex

The invention relates to the production of dye sintanol used for processing leather and fur
The invention relates to the production of the tanning agent used in the production of leather and fur

The invention relates to organic chemistry and is a new polymer-based 5,5'-methylenebisacrylamide aldehyde and diamine fluorophore General formula:

[=F=CH-C6H40-CH2-C6H40-CH=n,

where n= 6-9,

< / BR>
The claimed connection most effectively can be used as fluorescent additives in liquid and solid scintillators as active element in laser technology
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