anufacture of articles or shaped materials containing macromolecular substances (C08J5)

C   Chemistry; metallurgy(318327)
C08J5                 anufacture of articles or shaped materials containing macromolecular substances (manufacture of semi-permeable membranes b01d0067000000-b01d0071000000)(2133)
ethod for fusing gasket manufacture // 2641831
FIELD: chemistry.SUBSTANCE: method for fusing gasket manufacture, comprising the following sequence of actions: I. The following is successively charged in the reactor with the agitator turned on (parts by weight): - solvent - toluene - 50; - solvent - acetone - 50; - solvent - trimethylethylsilane 0.2-0.6; - epoxy diane resin - 100; - spherical particles of butadiene-nitrile-styrene-carboxylate polymer - 5-20; - fusing gasket components, determined by the composition for its operation conditions. II. Stirring until the epoxy resin is completely dissolved at a temperature of 20-30°C. III. Impregnation of fiberglass (130 parts by weight) with the resulting solution. IV. Drying of the solution-impregnated fiberglass in the shaft of a vertical impregnating machine at a temperature of 240-243°C for 4-4.5 minutes.EFFECT: ensured stable low warpage of the fusing gasket.5 ex, 1 tbl
ethod of gluing thin adhesive layers // 2641734
FIELD: technological processes.SUBSTANCE: method includes applying to the first substrate of an adhesive with a layer weight of less than 2 g/m2. The second substrate is a film of thermoplastic synthetic material. The surface of the second substrate is transferred to the softened state by heating up to a temperature in the range of +/-40°C from the softening point of the second substrate. Immediately after heating, the substrates are glued together by applying pressure.EFFECT: fast and reliable gluing when using a small amount of adhesive.11 cl, 1 tbl
Texstolite of multifunctional purpose // 2641125
FIELD: textile, paper.SUBSTANCE: texstolite is made of heat-treated woven semi-finished product containing reinforcing heat-resistant filler in the form of polyoxadiazole yarn or threads and thermoplastic binder in the form of continuous polyamide complex threads. The filler and binder are stranded twist 150-250 tw./m in combined thread linear of density of 58.0-100.0 tex when their ratio is (0.85-1.18) (0.84-1.16) and the ratio of densities of the woven semi-finished product on the basis of equal and duck 1:(0.5-0.8).EFFECT: reduction in porosity and giving noise, vibration, sound and antifriction properties.3 cl, 2 tbl, 2 ex

Composite materials from thermo-reactive resin containing inter-layer particles increasing strength // 2641004
FIELD: chemistry.SUBSTANCE: resin system comprises the following components: (i) a thermosetting resin comprising, at least, one tri-functional epoxy resin and, at least, one four-functional epoxy resin, (ii) thermoplastic polyamide particles having a melting temperature TPA; and (iii) one or more curing agents. The resin system does not contain epoxy resin with a functionality of less than three. The starting components of the resin system are selected so that the thickening of the epoxy matrix during the curing cycle of the resin system occurs at a thickening temperature TGEL at or below TPA. The resin system is cured at a temperature TC in the range of 170 to 190°C, and all thermoplastic particles have a melting temperature TPA not higher than curing temperature TC. The method of producing a composite material is to provide a resin system and combine it with reinforcing fibres. The system is then cured at a temperature in the range of 170 to 190°C at a rate of change of hardening RCR in the range of 0.05 to 3.0°C/min.EFFECT: invention makes it possible to produce a composite material containing thermoplastic particles that increase impact resistance, and having improved compression characteristics under conditions of elevated temperature and humidity, and to reduce or eliminate the formation of microcracks during curing.14 cl, 8 dwg, 7 tbl, 4 ex

Selectly weakened expansion films // 2640758
FIELD: technological processes.SUBSTANCE: film contains a number of unweakened parts; at least one pair of weakened parts and at least one weakened area extending between the pair of weakened parts, wherein the weakened parts and said at least one weakened area have at least one characteristic that is worse than the characteristic of said plurality of unweakened parts.EFFECT: creation of a film for a composite product, which allows improving its ballistic characteristics.15 cl, 25 dwg

Composite reinforcing yarn, prepreg, tape for 3d printing and installation for their production // 2640553
FIELD: chemistry.SUBSTANCE: composite reinforcing yarn contains a roving of reinforcing fibers impregnated with a thermosetting binder, with a cross-section in the form of a circle with the diameter of 0.1-0.7 mm or ellipse with the ellipticity of 1 to 2 and the largest diameter of 0.1-0.7 mm. Impregnated roving is subjected to a temperature treatment until the thermosetting binder is completely cured. From the filament, prepreg is obtained by adding a thermoplastic binder. The tape is obtained by joining the yarn or prepreg with jumper wires made of thermoplastic material. The yarn is produced in an installation containing a bobbin, on which a coil with roving of reinforcing fibers or reinforcing and functional fibers is installed, an impregnating device, two heat treatment chambers, a ready-made filament receiving unit, a receiving coil. The temperature in the first chamber is 70-130°C, in the second chamber - 160-400°C. To produce the prepreg, a thermoplastic coating device is added to the installation to impregnate the thermosetting binder and fully cured roving.EFFECT: invention allows to reduce the complexity of producing parts with a thermoplastic matrix, the duration of producing the product; increasing the shelf life of raw materials and the efficiency of producing the products from composite materials.13 cl, 6 dwg
Biodegradable film and laminate // 2640243
FIELD: chemistry.SUBSTANCE: biodegradable film comprises PHA and PLA, wherein the PLA content is 1-95 wt %, where PHA is PHB or PHV or a copolymer or a mixture of PHB and PHV, wherein PHB is P(3HB-co-4HB) polymerized with 3HB and 4HB, and the molar percentage of 4HB is in a range of 5 to 85%. The biodegradable film further comprises a cellulose fibre. The invention also relates to biodegradable laminate that contains PBAT or PBS or a mixture thereof and the said biodegradable film.EFFECT: laminates are characterized by a stronger biodegradability in a medium containing microorganisms and are characterized by a good shelf life and good strength, rapid adaptation, and flexibility.20 cl, 12 tbl

ethod of producing catalytic compositions and polymeric products produced with using these catalytic compositions // 2640048
FIELD: chemistry.SUBSTANCE: method consists of: combining one or more carriers with one or more magnesium-containing compounds under the reaction conditions to produce the first reacted product; a compound of one or more chlorinating compounds selected from the group consisting of one or more chlorinated silanes including dimethyldichlorosilane, chlorotrimethylsilane, methyltrichlorosilane, diethyl dichlorosilane, tert-butyldimethylsilyl chloride, n-butyltrichlorosilane, or any combination thereof with the first reacted product under the reaction conditions to produce the second reacted product and the compounds of one or more titanium-containing compounds selected from the group consisting of one or more titanium alkoxides, one or more titanium halides and combinations thereof with the second reacted product under the reaction conditions to produce a catalyst. Moreover, the catalyst essentially does not contain donor compounds. A method of producing polyethylene and polyethylene are also provided.EFFECT: invention makes it possible to produce polyethylene having a significantly increased molecular weight distribution.17 cl, 5 dwg, 12 tbl
Composition for production of semi-permeable porous membrane // 2638981
FIELD: chemistry.SUBSTANCE: invention can be used to produce a waterproof, air-vapour-permeable membrane, as well as to regulate the complex of performance properties of a membrane material. The composition includes, wt %: polyacrylonitrile 7-9, polyvinylidene difluoride 9-11, the rest - N,N-dimethylacetamide and N,N-dimethylformamide at a ratio of 1:1.EFFECT: invention makes it possible to increase the functional properties of membranes, namely the water resistance and the speed of electroforming.3 tbl, 7 ex

ethod of producing composite materials as polymer matrices filled with nanoparticles of metal oxides with modified surface // 2638658
FIELD: chemistry.SUBSTANCE: for the production of composite materials, the surface of the original BaTiO3 nanoparticles is preliminarily activated by the application of hydroxyl groups by boiling in a hydrogen peroxide solution and modified with cationic surfactant molecules by treatment with a solution of a cationic surfactant at a concentration below the critical micelle concentration. The resulting precipitate is filtered, washed from the cationic surfactant unbound to the surface of the metal oxide nanoparticles, and dried. The nanoparticles BaTiO3 with a modified surface are introduced into the polymer solution, achieving the desired volume ratio of the filler and the polymer matrix, and subjected to ultrasonic dispersion.EFFECT: simplification of the method of producing composite materials in the form of polymer matrices filled with nanoparticles of oxide ferroelectrics with a modified surface, allowing to reduce the degree of aggregation of nanoparticles in the polymer.3 dwg
Polyurethane casting resins and gas masses produced therefrom // 2638555
FIELD: chemistry.SUBSTANCE: polyurethane and polyisocyanurate are prepared from a reaction mixture consisting of one or more polyisocyanates (A), one or more polyether polyols (B), one or more polyepoxides (C), one or more hidden catalysts (D), if necessary, additives (E) and, if necessary, fillers (F). The viscosity of the reaction mixture is from 20 to 500 mPas⋅ at 25 °C. The ratio of the number of NCO group of components (A) and the number of OH groups of components (B) is from 10:1 to 16:1. The ratio of the number of NCO groups of components (A) and the number of epoxy groups of components (C) is from 2:1 to 25:1 and the ratio of the number of epoxy groups of components (C) and the mole number of the latent catalyst of component (D) is from 1.1:1 to 12:1.EFFECT: masses are optically transparent and have a good resistance to heat.5 cl, 2 tbl, 2 ex

Thermoplastic product with thermoactive agent // 2638397
FIELD: human vital needs satisfaction.SUBSTANCE: extruded water-soluble product comprises a water-soluble polymer having extrusion temperature of 90-150°C, a plasticiser, as well as one or more thermoactive agents which can either stimulate the sensory human receptors or change the temperature of the skin when exposed to it, in the total amount from 0.1 to 50% by product weight. Combination of the active agent(s) with the plasticiser before melt-blending with the water-soluble polymer prevents the phase separation of the active agent and the polymer. Products include films, fibres, rods, bars, etc. Such products can be placed in an absorbent product such as a bandage, a medical sheet, a napkin, a sheet, a diaper, panties or a pad.EFFECT: improvement of product properties.19 cl, 3 dwg
Composite structural composite elements strengthened by fibres and their manufacturing // 2638302
FIELD: chemistry.SUBSTANCE: elements comprise one or more fibrous layers impregnated with polyurethane and polyisocyanurate, which are prepared from a reaction mixture consisting of one or more polyisocyanates (A), one or more polyether polyols (B), one or more polyepoxides (C), one or more hidden catalysts (D), if necessary additives (E) and, if necessary, a fibrous material (F). The viscosity of the reaction mixture is from 20 to 500 mPas⋅ at 25 °C. The ratio of the number of NCO group of component (A) and the number of OH groups of component (B) is from 10:1 to 16:1. The ratio of NCO groups of component (A) and the number of epoxy groups of component (C) is from 2:1 to 25:1. The molar ratio of the number of epoxy groups of component (C) and the number of moles of the latent catalyst of component (D) is from 1.1:1 to 12:1. The method for manufacturing the fibrous composite structural elements comprises forming a mixture of the above components (A) to (F), loading the fibrous material into a half mould, introducing the mixture produced into this mould, the loaded fibrous material being impregnated, curing the mixture at a temperature of 50 to 170 °C.EFFECT: elements are dense, optically transparent and have a good resistance to heat.2 cl, 1 tbl, 2 ex

Polymers based on ethylene and products produced from them // 2638261
FIELD: chemistry.SUBSTANCE: polymer containing from 80.0 to 99.0 wt % of polymer links formed from ethylene and 1.0 to 20.0 wt % of polymer layers, formed from one or more C3-C20-α-olefin comonomers, is suitable for the production of films in the process of forming a tubular film when the degree of the bulge (BUR) of 3.0 to 8.0, and the ratio for the length of the neck (NHR) of 2.0 to 12.0. In addition, the ethylene-based polymer has a local maximum of the loss angle for the complex modulus, G*, equal to 2.50×104 up to 1.00×106Pa, and the local minimum of the loss angle with the complex modulus, G*, equal to 1.00×104 up to 3.00×104 Pa.EFFECT: films have excellent shrinkage and tear characteristics.22 cl, 2 dwg, 4 tbl, 33 ex
Powder polymer composition and method of its production // 2637962
FIELD: chemistry.SUBSTANCE: composition is produced by dissolving polyamide-12 in the presence of an inorganic filler, followed by crystallization of the powder polymer composition from the resulting solution and distilling off the solvent under reduced pressure. Before dissolution, polyamide-12 and the inorganic filler are mixed by extrusion. The resulting granulate is dissolved in a polar aprotic solvent/alcohol system containing 70-95 wt % of a polar aprotic solvent and 5-30 wt % of an alcohol, with a boiling point of the components of the system of, at least, 150°C. The composition produced by this method contains 60-99.9 wt % of polyamide-12 and 0.1-40 of inorganic oxide. The method reduces the dissolution time of polyamide-12 to less than 2 hours in the production of a polymer composition with an average particle size of 60-72 mcm, a bulk density of 0.34-0.42 g/cm3 and with a maximum intensity (peak) of the melting point not less than 180°C, as well as exclusion of technological stages at elevated pressure.EFFECT: simplifying the production method.4 cl, 3 tbl, 5 ex

Polyolefin film for packaging // 2637911
FIELD: packaging industry.SUBSTANCE: film comprises a thermoplastic composition that contains a continuous phase comprising a polyolefin matrix polymer and a nano-additive. The nano-additive is dispersed in the continuous phase in the form of discrete domains. A porous network is defined in the composition, which includes nanopores with an average cross-sectional dimension of up to 800 nm. The composition further comprises a micro-inclusion additive dispersed in the continuous phase in the form of discrete domains. The micro-inclusion additive is a polymer.EFFECT: reduction in application of polymers in films production while maintaining the mechanical properties of the film, such as ductility or tensile strength.38 cl, 3 dwg, 1 tbl, 8 ex
Polyamide compounds with improved optical properties // 2637556
FIELD: chemistry.SUBSTANCE: polymer composition comprises, at least, one polyamide and, at least, one compound of the formula , in which x is 1, 2 or 3; R1 and R2are independently selected from hydrogen, linear C1-C7-alkyl, branched C3-C10-alkyl, unsubstituted or substituted C3-C12-cycloalkyl, unsubstituted or substituted C3-C12cycloalkyl-C1-C4-alkyl, unsubstituted or substituted aryl and unsubstituted or substituted aryl-C1-C4-alkyl; and Z is trans 1,4-cyclohexanediyl. The use of a compound of formula I in a polymer composition for improving, at least, one optical property selected from increased transparency, increased laser transparency and reduced turbidity, and a moulded article produced from the said composition are also described.EFFECT: providing improved optical properties selected from reduced turbidity, improved transparency and improved laser transparency in polyamide compositions using the compound of formula I.23 cl, 23 tbl, 17 ex

Water-dispersible thermoplastic composition moulded by casting under pressure // 2637322
FIELD: chemistry.SUBSTANCE: invention relates to a water-dispersible composition for producing a moulded part of an article. The composition contains from 7 to 70 wt % of, at least, one cellulose derivative, where, at least, one cellulose derivative is hydroxypropyl methylcellulose; from 7 to 70 wt % of, at least, one synthetic water-soluble polymer and from 2 to 50 wt % of, at least, one plasticiser based on the total weight of the composition, where the ratio of the weighted proportion of synthetic water-soluble polymer and cellulose derivative is in the range of 0.1 to 10, additionally, where the composition is thermoplastic. The invention also relates to a moulded article comprising the said composition, and preferably where the moulded article is destroyed in immobile tap water for less than 18 hours. The moulded article is a tampon applicator. The invention also relates to a method of producing a part moulded by casting. The method includes the introduction of water-dispersible thermoplastic composition specified into the mould cavity and forming a thermoplastic composition into a moulded part inside the mould cavity. In addition, the method comprises applying a water insoluble coating to the part moulded under pressure.EFFECT: improving the compound properties.20 cl, 4 dwg, 8 tbl
Elastomeric rubber glove for application in cleanrooms and not containing vulcanization accelerators and sulfur // 2637243
FIELD: chemistry.SUBSTANCE: glove for cleanrooms is manufactured from elastomer containing 25-30 wt % of acrylonitrile, 62-71 wt % of butadiene and 8.4 wt % of unsaturated carboxylic acid (total 100 wt %), as well as a chemically active vinyl compound and a metal crosslinking agent. At that, the glove does not contain sulfur as a crosslinking agent or a vulcanization accelerator. Crosslinking is achieved by application of a reactive vinyl compound and a part of carboxyl groups of unsaturated carboxylic acid, and the remainder of the carboxyl groups is bound through the metal cross-linking agent, such as zinc oxide. Glove thickness is 0.050.15 mm, its manufacturing swelling ratio is 240-320, glove tensile stress is 22-35 MPa, elongation to break is 480-620%, and tensile stress at 500% glove elongation is 15-35 MPa.EFFECT: according to the invention, the glove is characterized by the lack of stickiness on the surface which contacts the user's hand, and the glove surface that is in contact with an object during operation, is smooth, metal or metallic salt contained in the glove as contaminants are removed, and the content of metal, metal salt and anion is reduced.4 cl, 16 dwg, 21 tbl

ethod of producing polymeric composite materials // 2637227
FIELD: chemistry.SUBSTANCE: composite material is produced by forming a fibrous roving base in the amount of 90-100 wp and its impregnation with a polymeric binder on the basis of epoxy-dian resin in the amount of 18-20 wp, while on the surface of the fibres of the roving base before it is impregnated a layer of organosilicon sizing with carbon nanotubes is preliminarily applied by treating the fibres with 1-2% solution of the organosilicon sinter in ethanol with carbon nanotubes in the amount of 0.001-0.005 wp of the carbon nanotubes and 0.1-0.2 wp of organosilicon coupling agent. The fibres of the roving base are treated with a solution by ultrasonic treatment of the solution. The method provides improved performance properties of composite materials.EFFECT: produced composite material allows to produce high-strength composite products, in particular, in the manufacture of reinforcement, rods, and profiles with a high modulus of elasticity and tensile strength.2 cl, 1 dwg, 2 tbl

Hybrid component based on metal and plastic // 2636720
FIELD: chemistry.SUBSTANCE: inherent property of the polymer composition is that it contains from 50 to 99.7 wt % of, at least, one polymer selected from polyamides, mixtures thereof, and polyaryl ether ketones, and from 0.3 to 20 wt % of one or more silicone-containing additives enhancing the adhesion. The invention further relates to the hybrid components based on plastic and metal and their preparation.EFFECT: products obtained from the compositions have improved physico-mechanical characteristics.15 cl, 3 dwg, 6 tbl
ulti-layer film with improved properties of elastic module // 2636711
FIELD: packaging industry.SUBSTANCE: product is obtained by three-dimensional forming a multi-layer plastic film which has a middle layer A, comprising at least one polycarbonate or copolycarbonate and/or polyester or copolyester. The mentioned middle layer A is located between two outer layers B containing at least one thermoplastic polyurethane having 45-85HSD.EFFECT: decreasing the characteristics of the elastic module under tension during the period of use of the product.17 cl, 2 tbl, 12 ex
ethod of producing polymeric composite material for manufacturing items // 2636495
FIELD: chemistry.SUBSTANCE: method includes mixing a polymeric binder, a glass reinforcing material, and a filler. As a polymer binder, a chemically resistant organic resin is used, as a glass-reinforcing material - a material with a "C" glass, and as a filler - dispersed quartz with a particle size of 0.008 and 0.025 mm. The glass-reinforced material is used in an amount of, at least, 30%, quartz with a particle size of 0.008 mm - in an amount of 5-10%, and quartz with the particle size of 0.025 mm - in an amount of 10-30% of the volume of the manufactured product.EFFECT: increasing the strength, hardness, heat resistance, wear resistance, and fire resistance of the composite material.3 ex
Composition of propylene resin // 2636316
FIELD: chemistry.SUBSTANCE: composition contains a random copolymer of propylene and ethylene (A), in which the ethylene content is 2-9 mol. %, the ethylene copolymer and α-olefin (B) produced by copolymerization of ethylene with one or more αolefins having 3-10 carbon atoms, a fibrous filler (C) having an average fibre length of 0.1 to 2 mm and an average fibre diameter of 1-25 microns, lubricant (D) and polypropylene modified with unsaturated carboxylic acids or their derivatives (E). The random copolymer of propylene and ethylene (A) has a melt flow rate (ASTM D1238, 230 °C, under load 2.16 kg) of 5 to 100 g/10 min, and a copolymer of ethylene and α-olefin (B) has a melt flow rate (ASTM D1238, 230 °C, under load 2.16 kg) of 0.1 to 80 g/10 min.EFFECT: resistance to surface damage, excellent mechanical properties.10 cl, 4 dwg, 2 tbl, 18 ex
ethod for producing nanocomposite materials based on polymeric matrix and nanoscale fillers - nanoparticles // 2636084
FIELD: chemistry.SUBSTANCE: method for producing nanocomposite materials is described, characterized in that mixtures of different nanoparticles are used as a nanoscale filler of, at least, two types: nanoparticles of the layered geometry, nanofibres, nanotubes, and nanocones/discs introduced into the polymer simultaneously or sequentially. The nanoparticles are introduced into the polymer simultaneously or sequentially by stirring with a mechanical stirrer for 24 hours at the speed of 1000 rpm. At the same time, at least, one of several types of the used nanoparticles can be introduced into the polymer matrix at the stage of its synthesis (in situ polymerization). From the produced nanocomposite solution, films are cast by means of a slot die, dried for 2 hours at the temperatures of 80°C or 70°C followed by the heat treatment in heating mode up to 360°C with the speed of 5 deg/min or up to 250°C at the speed of 3 deg/min and holding at this temperature for 15 or 30 minutes, respectively.EFFECT: providing a polymer material with a high total nanoparticle concentration, at which the concentration of nanoparticles of each type remains sufficiently low to remain uniformly distributed in the volume of the polymer and not to form aggregates, which provides an increased level of mechanical characteristics such as a module of elasticity, strength, and a plasticity limit.2 cl, 1 dwg, 1 tbl, 7 ex
ethod for producing polymeric piezo films with layers of electro-conducting polymers // 2635804
FIELD: chemistry.SUBSTANCE: method consists in conducting successive stages of melt extrusion of polyvinylidene fluoride, isometric annealing of the extruded film, uniaxial stretching, thermofixing, high-voltage polarising, and forming the layers of the electrico-conducting polymer on the film surface by oxidative in-situ polymerization. First, high-voltage polarisation and then forming a layer of an electro-conducting polymer, for example, such as polyaniline, polypyrrole, polyacetylene, polythiophene are carried out. The polarisation is carried out in the temperature regime, at which the film is first held in an electric field at 90°C, and then cooled without turning off the field to room temperature.EFFECT: invention allows to increase the total porosity of PVDF films while maintaining a high content of crystalline β-form.2 tbl, 1 ex

ethod of obtaining dynamically volcanized alloys // 2635610
FIELD: technological processes.SUBSTANCE: alloy includes at least one elastomer and at least one thermoplastic resin. According to the method, the thermoplastic resin is added to the extruder in two stages with the intermediate addition of a compatibilizing agent. In addition, vulcanizers of elastomers are added to the extruder during the final addition of the thermoplastic resin.EFFECT: invention allows to obtain dynamically vulcanized alloys with unique morphological properties, which are characterized by good impermeability and low-temperature elasticity.19 cl, 3 dwg, 9 tbl
ultilayer polymer film // 2635599
FIELD: chemistry.SUBSTANCE: invention relates to a multilayer polymer film comprising two sealing layers and a polyolefin base layer in the following sequence of layers: a sealing layer - a base layer - a sealing layer, wherein the sealing layer comprises polypropylene and wherein the SL-PP polypropylene sealing layer contains comonomer units derived from ethylene, in an amount of 0.5 to 25 wt %, and, at least, one C5-12alpha-olefin, in an amount of 0.5 to 4.0 mol. %, and the content of the fraction soluble in cold xylene XS is 20 to 60 wt %, and the fraction soluble in cold xylene contains comonomer units produced from ethylene, in an amount of 4 to 50 wt %.EFFECT: multilayer films of the invention have a lower weld start temperature, along with improved impact strength and tear resistance properties.11 cl, 3 tbl
ethod of obtaining antimiscular film material based on derivatives of cellulose // 2634577
FIELD: chemistry.SUBSTANCE: method comprises dissolving hydroxyethyl cellulose in water in the presence of a crosslinking agent - glutaric acid in an amount of 10-50 wt % of the polymer, drying the resulting film in air at a temperature of 18-25°C and subsequent heat treatment at a temperature of 98-105°C for 180-360 minutes.EFFECT: simplification and improvement of the process safety, lowering of the heat treatment temperature, longer film stay in the zone of postoperative recovery, and an increase in the anti-spasm effect.1 tbl, 14 ex
ethod of obtaining polymer composition for high-frequency energy absorbing // 2633903
FIELD: radio engineering, communication.SUBSTANCE: method of obtaining a polymer composition for high-frequency energy absorbing is based on the fact that components of the polymer composition are mixed to absorb high-frequency energy of the following makeup pts. wt.: a low molecular dimethylsiloxane caoutchouc SKTN 15-25, carbonyl iron P-10 105-175, a cold curing accelerator No. 68 1.5-2.5, ethyl silicate-40 1.5-2.5 and cured. The method includes the steps of weighing rubber of a low molecular dimethylsiloxane caoutchouc SKTN and ethyl silicate-40, the mixing these components to a uniform state for 10 minutes at a temperature of 25±10°C, then injecting into this mixture the carbonyl iron P-10, previously dried at a temperature of 120±5°C for 2-3 hours in a pan of a 2-3 cm, cooled to a temperature of 25±10°C and sieved through a sieve № 0.05. A mixture of a low molecular dimethylsiloxane caoutchouc SKTN, ethyl silicate-40, carbonyl iron P-10 is thoroughly mixed for 10 minutes at a temperature 25±10°C. Then, a cold curing accelerator No. 68 is injected into the prepared mixture and the mixture is mixed for 10 minutes at a temperature 25±10°C. The final mixture is kept at a temperature of 25±10°C for 10 minutes to remove air bubbles. Curing is carried out at a temperature of 25±10°C with not less than 20 hours, then at a temperature of 160±5°C for 7 hours.EFFECT: reduction of shrinkage of the composition after its curing, ensuring the stability of the composition after exposuring high temperature and cyclic temperature changes, increasing the attenuation of the microwave signal wave.1 tbl

Bonding of composite materials // 2633581
FIELD: technological processes.SUBSTANCE: resin-enriched outer layer is applied to the curable resin-based composite substrate with the subsequent cocuring. After cocuring, the composite substrate is completely cured, and the matrix resin in the outer layer remains partially cured. After removal of the outer layer, a rough surface which is capable to bond with chemically active functional groups opens up. A composite substrate with a chemically active, capable to bond surface can be connected to another composite substrate to form a covalent-bonded structure.EFFECT: proposed outer layer is designed so that it can be applied to various composite substrates such as prepregs to modify their surfaces and provide improved adhesion and bonding properties.18 cl, 11 dwg, 6 tbl, 5 ex
ethod of obtaining polymeric compositions based on polytetrafluoroethylene containing mineral filler // 2632843
FIELD: chemistry.SUBSTANCE: method of producing polymer compositions based on polytetrafluoroethylene involves pre-dispersing the mineral filler phlogopite and magnesium spinel in a planetary mill. Further, subsequent ultrasonic treatment is carried out in an environment of ethyl alcohol at a volume power of ultrasound of 3000 W for 15 minutes. Then, the products are manufactured by cold pressing, followed by free sintering and cooling.EFFECT: use of the invention will reduce the rate of mass wear of the composite material up to 370 times and increase the relative elongation, and products based on it-the resource of machines and equipment.1 tbl, 1 ex
Stabilizing additive for crushed-mastic asphalt concrete // 2632839
FIELD: chemistry.SUBSTANCE: stabilizing additive in the form of granules for crushed-mastic asphalt concrete includes a stabilizing material-mineral fibre having a capillary structure, an organic binder-bitumen and a rubber powder with the following composition ratio, wt %: stabilizing material 60-90, rubber powder 5-20, organic binder 5-20.EFFECT: increasing the retaining effect of the additive and improving the bitumen stabilization due to delicate pressing in the granulator.1 cl
ethod of obtaining oil field constituent element swelling in hydrocarbon service // 2632824
FIELD: oil and gas industry.SUBSTANCE: method of obtaining oil field constituent element swelling in hydrocarbon service from a composition comprising, pts. wt: ethylene-propylene-diene rubber with a content of moll.%: ethylene 60-77, ethylidene norbornene 0.9-8, propylene is the rest, - 100.0, cellulose ether 1.0-50.0, acrylic acid copolymer with acrylic acid amide or with potassium acrylate 60.0-150.0, carbon black 50.0-100.0, fine silica - 15.0-50.0, zinc oxide 3.0-7.0, stearic acid 1.5-3.0, antioxidants 1.0-2.0, vulcanization system: sulfur - 0.5-2.5 and vulcanization accelerators - 2.3-3.5 or organic peroxide 4.5-10.0 and co-agent of vulcanization (100% of active substance) - 3.6-5.0, technological additives - 1.0-3.0, by means of mixing which is carried out in two stages: all components, except for the curing system, are first mixed for 30-40 minutes at the temperature of the mixture at the end of mixing not more than 140°C, then after the mixture is cooled to 40-60°C, a curing system is introduced, mixed for 10-13 minutes at the mixture temperature at the end of mixing not more than 110°C, followed by forming the element under pressure of 12-20 MPa at a temperature of 150-170°C for 30-60 min.EFFECT: increased degree of swelling in the hydrocarbon service and increased service life while simplifying the composition.1 cl

Improvement of composite materials // 2632454
FIELD: chemistry.SUBSTANCE: prepreg contains a fiber-reinforced curable resin, wherein the prepreg contains electrically conductive particles in the range of 0.5 to 10 wt %, based on the resin. Electro-conductive particles include graphite in a potato form. The composite used, for example, as an aircraft component, is based on a prepreg and includes a fiber-reinforced cured epoxy resin and an electro-conductive particle. The composite contains an electro-conductive particle that includes graphite in a potato form. The curable epoxy resin comprises a reinforcing agent polyamide and graphite in a potato form.EFFECT: preparing prepregs and composites based on prepregs with improved properties, in particular with increased electro-conductivity and increased mechanical properties.31 cl, 2 dwg, 12 tbl, 24 ex
Nanocomposite material with biological activity // 2632297
FIELD: nanotechnology.SUBSTANCE: nanocomposite material with biological activity includes a substrate of a biocompatible polymer, preferably polytetrafluoroethylene or polyethylene terephthalate having a nanostructured surface as a result of its etching by tetrafluoromethane ion fluxes to form a rms roughness Rq of 5-200 nm, with the surface relief of the substrate being modified with a carbon-containing nanoscale film obtained ion-stimulated precipitation in a vacuum from cyclohexane. It is new that the carbon-containing film modifying agent, which is obtained by precipitation from a plasma-forming mixture of tetrafluoromethane and cyclohexane, additionally contains fluorine in a weight ratio to carbon in the range of 0.5 to 1.3, and the relief of the nanostructured substrate surface is formed by projections spaced apart by distance 0.3-1.0 mcm, whose height is at least twice the radius of their base, the modifying film containing fluorine and carbon in the following mass ratio of 32-55% and 65-42%, respectively.EFFECT: proposed technical solution completely eliminated the adhesion of microorganisms on the surface of nanostructured material, the superhydrophobicity of which was achieved due to the optimized content of fluorine and carbon on a given nano-relief of the substrate surface, and the resulting optical transparency of the material in the visible spectral range ensured suitability for use in polytronics.1 cl
ultilayer combined material polymer-composite and method of its manufacture // 2632295
FIELD: technological processes.SUBSTANCE: method includes plasma-chemical treatment of the polymer material surface in the region of negative glow of an abnormal glow discharge of a low-temperature plasma with a plasma-forming gas temperature of not more than 50°C under the reduced pressure, forming a layer of composite material on one or both surfaces of the polymer material. As a polymer layer, polyethylene, polypropylene, fluoroplastic, or polyvinyl chloride are used. The composite material is formed by successive laying of the fibreglass layers, applying a binder resin to each layer of fibreglass . Plasma-chemical treatment of the polymer material surface is carried out for 1 minute at a pressure of 13 Pa in the region of negative glow of an abnormal glow discharge of a low-temperature plasma, the plasma-forming gas is changed at a flow rate of 50 ml/min. The current density of a glowing abnormal discharge is 0.5 mA/cm2, or plasma-chemical treatment of the polymeric material surface is carried out for 5 minutes at a pressure of 13 Pa in the region of negative glow of an abnormal glow discharge of a low-temperature plasma, the plasma-forming gas is changed at a flow rate of 10 ml/min, while the current density of a glowing abnormal discharge is 0.1 mA/cm2.EFFECT: invention provides for the creation of a material with an increased mechanical strength sufficient to operate under conditions of high mechanical loads, cryogenic high temperatures, in accordance with the selected materials of the polymer and composite layers.4 cl, 2 dwg, 2 tbl
Polymer material with multimodal pore distribution by size // 2631796
FIELD: technological processes.SUBSTANCE: material is formed by applying a force to a thermoplastic composition comprising a continuous phase comprising first and second additives in the form of discrete domains dispersed in a continuous phase. The continuous phase comprises a matrix polymer in which a plurality of micropores having an average cross-sectional dimension of from about 0.5 to about 30 micrometers is formed on and/or around the first domains and in which a plurality of nanopores having an average A cross-sectional dimension of about 50 to about 500 nanometers. The matrix polymer has a glass transition temperature of 0°C or more.EFFECT: achieving a unique multimodal porous structure as a result of the use of specific types of inclusion additives and careful control over how such additives are dispersed in the polymer matrix.29 cl, 14 dwg, 1 tbl, 4 ex

Film composition // 2631651
FIELD: chemistry.SUBSTANCE: composition of polyethylene has a density equal to 948-956 kg/m3, a melt index at an increased shear stress, HLMI, equal to 7-15, a dynamic module of melt elasticity G' at a dynamic frequency, at which the loss module G"=3000 Pa, G'(G"=3000) is 1400-1800 Pa, and the value of Mz/G'(G"=3000) is not less than 900 Da/Pa, where Mz is the z- average molecular weight. In addition, this film has an interaction between the tensile strength in the transverse direction of the film of 15 mcm thick (TTD expressed in units of g/25 mcm) and the impact resistance, when the pointed load falls on a 15 mcm film (I expressed in grams) having a film view TTD>62000/l.EFFECT: films have an improved balance of mechanical characteristics, in particular tensile strength and impact resistance, in combination with excellent extrudability, melt strength, strength characteristics and barrier characteristics.13 cl, 2 dwg, 3 tbl

Composite materials // 2631299
FIELD: construction.SUBSTANCE: curable composite material comprises at least one structural layer of reinforcing fibers impregnated with a curable resin matrix, and at least one conductive composite particle located near or adjacent to said reinforcing fibers. Said conductive composite particle comprises a conductive component and a polymer component. The polymer component comprises one or more thermoplastic polymers. The thermoplastic polymers are initially in the solid phase and are substantially insoluble in the curable resin matrix before the composite material curing, but are able to undergo at least the partial phase transition to the liquid phase due to dissolving in the resin matrix during the curing cycle of the composite material. Thermoplastic polymers have the glass transition temperature (Tgl) more than 200°C.EFFECT: invention allows to increase the electrical conductivity of the composite in the direction of thickness, to improve the impact strength and the resistance to delamination of the multilayer composite structure.37 cl, 6 dwg, 7 tbl, 6 ex
ethod of producing electroproductive rubber volcanizate with carbon filler // 2630806
FIELD: chemistry.SUBSTANCE: method involves curing a rubber mixture at the temperature of 150°C, containing, wt %: SKN-18 - 40 rubber, a vulcanization polysulphide accelerator - 12, dibutyl phthalate - 1, diamine - 1, phthalic anhydride - 1, a carbon filler - 40, regenerate - 5. Herewith the carbon filler material used is the carbonaceous material of the fibrous structure obtained by thermocatalytic pyrolysis of gas condensate from the natural gas purification system at the compressor station of the main gas pipeline under conditions of contact with the iron oxide catalyst Fe2O3 at atmospheric pressure and at the temperature of 600-700°C, a bulk feed rate of 25 ml/min, for 5 hours, followed by cooling to 20°C and screening of 50-150 mcm fraction by fractionation of the formed carbon mass on molecular sieves. The finished rubber vulcanizate is subjected to additional heat treatment in a thermostat at the temperature of 250°C for 3 hours.EFFECT: increasing the yield of the target product, the relative stability of the conductive properties over time, and simplifying the technology for producing the product.3 tbl
ethodology of initiation of pore formation // 2630792
FIELD: technological processes.SUBSTANCE: invention provides a technique (method) for initiating the formation of pores in a polymeric material that contains a thermoplastic composition. The thermoplastic composition contains microinclusions and nanoinclusions, dispersed in a continuous phase, which includes a matrix polymer. To initiate pore formation, the polymeric material is subjected to mechanical stretching (for example, bending, stretching, twisting, etc.) to impart energy to the continuous phase interface and inclusion additives, which enables separation of the inclusion additives from the interface to create a porous network. The material is also pulled in a solid state in the sense that it is maintained at a temperature below the melting point of the matrix polymer.EFFECT: xxxxxxx.26 cl, 13 dwg, 17 tbl, 21 ex
ethod for processing fine powder fillers of composite materials // 2630527
FIELD: chemistry.SUBSTANCE: surface of fine powder fillers is treated with a solution of a phenol-formaldehyde resin of resol type with a nonionic surfactant in isopropanol with vigorous stirring in a vacuum reactor under conditions of a fluidized bed of powder fillers.EFFECT: improved method.2 cl
Processing method of composite materials fibered reinforced fillers // 2630515
FIELD: chemistry.SUBSTANCE: surface treatment of the fibred reinforced fillers is carried out with the solution of phenol-formaldehyde resin of resole type and non-ionic surfactant in isopropanol with slow stirring in the vacuum reactor. Further drying under the vacuum is carried out until the isopropanol is completely removed.EFFECT: processing quality improvement.2 cl

Energy absorbing element // 2630144
FIELD: chemistry.SUBSTANCE: protective element comprises a polymeric material formed by drawing from the thermoplastic composition. The thermoplastic composition comprises a continuous phase comprising a matrix polymer, and in which the microinclusion additive and the nano-inclusion additive are dispersed in the form of discrete domains, and further comprises a phase interface modifier. The material defines a pore network that includes a plurality of nanopores with an average cross-sectional dimension of about 800 nanometres or less. The matrix polymer comprises a polyolefin or a polyester. The microinclusion additive includes a polyolefin (a propylene homopolymer, a propylene/α=olefin copolymer, an ethylene/α-olefin copolymer or a combination thereof, a nano-additive is polymeric (functionalized polyolefin, polyepoxide).EFFECT: increased necessary protective properties.39 cl, 13 dwg, 5 tbl, 4 ex
Self-adhesiving fiberglass tissue activated by water // 2630097
FIELD: construction.SUBSTANCE: invention relates to a self-adhesive wall covering comprising closed-type fiberglass canvas consisting of glass fibers and a polymeric binder permeable to water and an adhesive coating comprising simultaneously contact glue (PSA) and a latent adhesive activated by water. The final attachment to the wall of the self-adhesive resealable coating is carried out after its installation by means of applying one or several layers of water-based paint.EFFECT: creation of a self-adhesive wall covering based on fiberglass with the function of self-gluing/reinstalling and the function of gluing by means of activating latent glue by moistening, which allows to install it on the walls in one step.15 cl, 1 tbl, 2 ex
Two-component lubricate composition for coating of fiberglass and composite material reinforced with indicated fiberglass // 2629934
FIELD: chemistry.SUBSTANCE: two-component lubricate composition comprising (A) a precursor comprising (a) an aminoalkoxysilane and (b) a polymer or copolymer containing carboxylic acid and/or anhydride, both of which have functionality F≥3, and (B) a binder comprising a multifunctional epoxy resin with functionality F≥3. Fiberglass coated with the claimed composition and a reinforced composite material made therewith, as well as the method for applying a two-component lubricate to fiberglass and applying a lubricate composition to improve the mechanical properties of the composite material reinforced with fiberglass are proposed.EFFECT: fibreglass lubricated by the interaction product of the proposed composition, imparts a higher resistance to hydrolysis to composite materials with a polymer matrix reinforced with the said fiber, the composition of the invention is particularly effective for use with polyester resins.13 cl, 5 dwg, 2 tbl, 2 ex
ethod for production of anti-adhesion film material based on carboxymethyl cellulose // 2629842
FIELD: medicine.SUBSTANCE: method for anti-adhesion film material production involves dissolution of the polymer, represented by a mixture of carboxymethyl cellulose and hydroxyethyl cellulose in a ratio of 8:2 to 3:7, in water in the presence of a glutaric acid structurant in an amount of 10-50% by polymers weight, drying at 18-25°C and heat treatment in air at 98-105°C for 180-360 minutes.EFFECT: invention ensures a longer film stay in the postoperative recovery zone and an increase in the ant-adhesion effect, simplification and improved safety of the technological process and lower temperature of heat treatment.1 tbl, 15 ex
ethod for production of anti-adhesion film material based on carboxymethyl cellulose // 2629841
FIELD: medicine.SUBSTANCE: invention relates to a method for preparation of an anti-adhesion film material comprising dissolution of a polymer, represented by a mixture of carboxymethyl cellulose and hydroxyethyl cellulose in a ratio of 8:2 to 3:7, in water in the presence of a 1,6-hexanediol diglutar ester structurant in an amount of 10-50% by polymer weight, drying at 18-25°C and heat treatment in air at 98-105°C for 180-360 minutes.EFFECT: ensures a longer film stay in the postoperative recovery zone and an increase in the ant-adhesion effect, simplification and improved safety of the technological process and lower temperature of heat treatment.16 ex, 1 tbl

ultipolimeric composite structures and their production method // 2628607
FIELD: aviation.SUBSTANCE: rigid flexible composite structure includes textile construction from at least one textile layer, consisting of textile fibers, and having distribution of pores in it. The pore distribution includes a plurality of pores within the fibers in individual textile fibers and a plurality of pores between the fibers. The structure includes the first polymer that fills pores having a pore diameter equal to or less than pore diameter threshold, and the second polymer that is bonded to the first polymer and substantially fills pores having a pore diameter larger than the pore diameter threshold. Some embodiments include a rigid first polymer, such as an epoxide, and a flexible second polymer, such as silicone. The method for producing the composite structure includes selective filling in a textile layer, having a plurality of pores, only of those pores, diameter of which is equal to or less than the pore diameter threshold by the first polymer, and substantially filling the remaining pores in the textile layer with the second polymer.EFFECT: creation of composite material for coating or obtaining the skin of an aircraft having a mechanical stability suitable for forces acting on it.16 cl, 8 dwg
 
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