Compositions of polysaccharides or of their derivatives (C08L1)

C08L1/06 - Cellulose hydrate(1)
C08L1/08 - Cellulose derivatives(19)
C08L1/10 - Esters of organic acids(31)
C08L1/12 - Cellulose acetate(131)
C08L1/18 - Cellulose nitrate(45)
C08L1/22 - Cellulose xanthate(2)
C08L1/24 - Viscose(11)
C08L1/26 - Cellulose ethers(22)
C08L1/28 - Alkyl ethers(27)
C08L1/32 - Cellulose ether-esters(1)
Polybutadiene with epoxy groups // 2641754
FIELD: chemistry.SUBSTANCE: polybutadiene with epoxy groups contains monomer units derived from 1,3-butadiene (A) , (B) , and (C) . In polybutadiene with epoxy groups, the relative amount of monomeric units (A) in the entire set of monomer units derived from 1,3-butadiene is from 10 to 60 mol. %, and the sum of the relative amounts of the monomeric units (B) and (C) in the entire set of monomer units derived from 1,3-butadiene is from 40 to 90 mol. %.EFFECT: invention makes it possible to reduce the viscosity and glass transition temperature of polybutadiene with epoxy groups.22 cl, 1 tbl, 3 ex

Polymeric hydrogels and methods for their preparation // 2641749
FIELD: pharmacology.SUBSTANCE: invention relates to a polymeric hydrogel comprising carboxymethyl cellulose and citric acid. This citric acid participates in the formation of cross-links in carboxymethylcellulose, wherein the said polymeric hydrogel has a swelling ratio of 50 to 300. The invention also relates to application of said hydrogel for use in the treatment of obesity in a patient in need thereof, as well as for the manufacture of a medicament for obesity treatment in a patient in need thereof.EFFECT: increased application efficiency.12 cl, 2 dwg, 8 tbl
Super-absorbing polymer and method of its manufacture // 2641700
FIELD: chemistry.SUBSTANCE: superabsorbent acrylate resin is proposed with particles included therein selected from silica, titania, alumina, and combinations thereof and having the following properties: i) -ii): i) the BET specific surface area is in the range of 300-1500m2/g, ii) the degree of porosity is 50% or more. The particle size is in the range of 2 nm to 50 mcm, the superhydrophobicity is equal to the contact angle with water 125° or more, the number of particles is 0.001 to 1 pts wt per 100 pts wt of superabsorbent acrylate resin. A method for producing the claimed resin is also provided.EFFECT: proposed superabsorbent resin has a high degree of processability, in particular reduced crumbling of resin during application processes.10 cl, 4 tbl
ethod for production of biodegradable coating base // 2641276
FIELD: biotechnology.SUBSTANCE: invention relates to a method for production of a base of biodegradable coating based on methylcellulose and tea fungus, and can be used for cosmetic and medical purposes, for example as masks for skin or medical dressings for reconstructive surgery, tissue regeneration and packaging materials. Initial components are prepared for the method for production of the biodegradable coating base, then methylcellulose as a colloid gel obtained by maintaining a 3-5% aqueous solution of methylcellulose at a temperature of 50 to 60°C for 1.5-2.0 h, is mixed with a reagent for rheology modification represented by gelatin, a plasticiser represented by glycerin, and an antibacterial reagent, then the resulting mixture is mixed and placed on plates, followed by drying, cutting and packing. Tea fungus zooglea is used as an antibacterial reagent, which is pre-conditioned for 10-12 days in the culture liquid, then the tea fungus zooglea is homogenized until a homogeneous mass is obtained, autoclaved for 15-20 minutes at a temperature of 120-125°C at a homogenate pH of 2.8-3.2, and the reagent for rheological characteristics modification, represented by gelatin, is maintained for 55-60 minutes at a temperature of +(20-25)°C, then placed on a water bath at a temperature of +(65-70)°C till complete dissolution, followed by gradual addition of components to the mixer at the following ratio of components in wt %: tea fungus 43.0-45.0, methylcellulose 0.5,-0.7, gelatin 0.1-0.2, glycerin 1.7-1.9, distilled water - the rest, stirring at a rotation speed of 300-400 rpm for 10-15 minutes until a homogeneous gel-like mass is obtained and freezing at a temperature of (49-45)°C for 5-7 hours before drying.EFFECT: simplification and reduction in the cost of production of the biodegradable coating base.5 ex

Segmented, semi-crystal soluble compounds of lactide and epsilon-caprolactone // 2640817
FIELD: medicine.SUBSTANCE: bioabsorbable semi-crystal segmented block copolymer is described, containing a reaction product of: (a) amorphous prepolymer, formed by polymerization of lactide monomer and epsilon-caprolactone monomer in the presence of an initiator, and molar ratio of lactide and epsilon-caprolactoneu in the prepolymer is from 45:55 to 30:70; and (b) lactide monomer with the specified lactide monomer bioabsorbable semi-crystal segmented block copolymer having duplicate links of polymerized lactide and polymerized epsilon-caprolactone, where the molar ratio of polymerized lactide and polymerized epsilon-caprolactone is from 60:40 to 75:25. A bioabsorbable surgical suture containing the above copolymer is also described. A bioabsorbable medical implantable device comprising the above copolymer is described.EFFECT: preparation of a polymer for manufacture of long-term resorbable surgical sutures and medical devices.19 cl, 2 dwg, 3 tbl, 7 ex

ethod of producing polydienes and polydiene copolymers with reduced cold flow // 2640800
FIELD: chemistry.SUBSTANCE: method comprises (i) polymerization of monomers with the formation of the reactive polymer, wherein the monomer includes a conjugated diene monomer, at a specified stage of polymerization using a coordination catalyst, and the said reactive polymer has a reactive end of the chain, and (ii) carrying out reactions of this reactive polymer with glycidyl ether. Also, a bound polymer and a tire component derived from a bound polymer are described.EFFECT: improved resistance of the bound polymer to cold flow.13 cl, 1 dwg, 1 tbl, 3 ex
Rubber mixture on basis of propylenoxide rubber for frozen-oil resistant products // 2640784
FIELD: chemistry.SUBSTANCE: rubber mixture includes, pts wt: propylenoxide rubber SKPO - 75-95, epichlorhydrine rubber SKEHG-ST - 5-25, stearic acid 0.5-3.0, zinc oxide - 2.0-10.0, captax - 0.3-1.0, thiuram - and 0.5-2.0, sulfur - 0.5-2.0, filler-technical carbon - 0-100.EFFECT: rubber mixture according to the invention makes it possible to obtain rubber with high frost resistance and strength while maintaining oil resistance.1 tbl, 1 ex
Oxygen absorbing compositions // 2640536
FIELD: chemistry.SUBSTANCE: invention relates to the preparation of a super concentrate composition and a concentrate itself based on cobalt transition metal, a compacted composition based on cobalt transition metal, and to a method of producing compacted pellets of cobalt transition metal. The super concentrate composition contains a polymeric carrier, for example, a polyester, and cobalt dispersed in the polymer carrier. The compacted composition comprises an oxygen absorber and the said super concentrate composition dispersed in the oxygen absorber. Compacted pellets of cobalt transition metal is produced by extrusion of the super concentrate composition, processing the extrudate with the provision of the shape in the form of particles by grinding or triturating. Subsequent compaction of individual pellets from a homogeneous mixture.EFFECT: reduction of oxidative damage in the presence of oxygen.20 cl, 3 tbl, 3 ex
Allylamine-containing polymers with end carbinol groups // 2640041
FIELD: chemistry.SUBSTANCE: copolymer of butadiene and styrene is provided, containing at the beginning of the polymer chains tertiary amino groups of the formula (Ia) or (Ib), where R1, R2 are the same or different and are alkyl radicals, and also contain silane-containing carbinol groups of the formula (III) at the ends of the polymer chains or their metal salts or salts of semimetals, where R3, R4, R5 and R6 are the same or different and are hydrogen or an alkyl, alkaryl and aralkyl radical, A is a divalent organic radical, which may contain, in addition to carbon and hydrogen atoms, heteroatoms such as oxygen, nitrogen, sulfur and/or silicon. A method of producing these copolymers and variants for their use, including for the production of tires and various shaped articles, are also provided.EFFECT: copolymer according to the invention is well-developed and allows the production of tires and moulded articles with the improved performance characteristics.22 cl, 2 tbl, 3 ex

Simple ethers of cellulose that have increased thermal strength of gel // 2640024
FIELD: chemistry.SUBSTANCE: invention relates to a thermogel forming composition, which is produced by combining nanocrystalline cellulose with cellulose ethers. This mixture can be used as a binder in a variety of different cases, for example, in food and raw ceramics. It can also be used to manufacture capsule shells for pharmaceuticals.EFFECT: inventionprovides increased gel strength at a high temperature.12 cl, 1 tbl, 5 ex, 4 dwg
Butadiene rubber with drawfully increased viscosity by mooney received with use of inodimic catalyst // 2638960
FIELD: chemistry.SUBSTANCE: invention relates to a method for the stepwise increasing the Mooney viscosity in the preparation of high molecular weight polybutadiene having a content of 1,4-cis units >95 wt %, and a content of 1,2-vinyl groups <1 wt %, wherein 1) at least, one monomer, which is 1,3-butadiene, is polymerized at a temperature of 50 to 120°C in the presence of, at least, one inert organic solvent and, at least, one neodymium carboxylate catalyst, 2) the polymerization is terminated by the addition of protonic compounds selected from the group consisting of stearic acid and lauric acid, and (3) sulfur oxides are added to the polymerizer, which, before addition, is treated with a fatty acid ether of vegetable origin, which is epoxidized soybean oil. The invention also relates to a neodymium-catalyzed high molecular weight polybutadiene, which is produced by the above method. The high molecular weight polybutadiene catalyzed by neodymium has a coefficient of its modification of 1.3 to 2.5, preferably of 1.4 to 2.1. The modifying factor is the Mooney stress relaxation ratio measured after step 2), to the Mooney stress relaxation measured after step 3), and wherein the stress relaxation is measured according to ASTM D 1466-00. In addition, the invention relates to rubber blends containing the said polybutadiene, fillers, crosslinking agents, as well as additional auxiliary components of rubber compounds selected from the group consisting of vulcanization accelerators, antioxidants, heat stabilizers, light stabilizers, antiozonants, processing aids, plasticizers, tackifiers, blowing agents, dyes, pigments, waxes, diluents, organic acids, vulcanization retardants, metal oxides, and activators. Rubber mixtures can be used to make moulded articles and modify the toughness of thermoplastics.EFFECT: improving the properties of compounds.16 cl, 3 tbl, 1 dwg

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

Heat-resistant fire-resistant material // 2638335
FIELD: construction.SUBSTANCE: invention can be used in the manufacture of protective clothing designed for operation in high-risk conditions and resistant to aggressive media, in particular to a material ensuring the protection from thermal risks, sparks, and metal spatter. A heat-resistant fire-resistant multilayer material with polymer coating is described, consisting of one and a half layers of a fabric made from para-aramide fibre threads, in which the fabric is characterized by interlacing with a repeat, equal to 4 threads by the warp and to 8 threads by the weft, for the building of which more than one system of weft threads is used. The spaces between the threads are less than their diameter with the surface material density not less than 320 g/m2, and the heat-resistant polymer coating of the fabric is made on the basis of fluorine rubbers and/or a silicone composition.EFFECT: fire-resistant multilayer material based on para-aramide fibre and a polymer binder with the possibility of operation in corrosive media has been obtained.3 cl, 1 dwg, 1 tbl

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
Coating compositions of containers for food products and beverages // 2637023
FIELD: packaging industry.SUBSTANCE: coated article comprises a container for a food product or beverage comprising a metal can and a composition for coating the interior surface of the containers for food products and beverages containing a binder resin comprising a polymer with reactive functional groups and a hardener and a polysilicone resin, in particular from 10 to 30 wt % with respect to the solid mass of the alkylphenylsilsesquioxane resin containing hydroxyl groups, functional groups reactive with the functional groups of the hardener, wherein the mentioned composition is dispersed in an aqueous medium.EFFECT: providing the possibility of coating directly on steel without pre-treatment or auxiliary adhesive, without the formation of microcracks and visible corrosion during storage of food products and with the complete release of contents from the inside of the can when turning over.10 cl, 4 tbl, 3 ex
ethod for producing carboxylic acid esters and their application as plasticizers // 2636586
FIELD: chemistry.SUBSTANCE: invention relates to the method for producing carboxylic acid esters, in which in the reaction system consisting of one or more reactors, the reaction mixture is subjected to the interaction, which contains, at least, one carboxylic acid and/or, at least, one anhydride of carboxylic acid and, at least, one alcohol R1-OH and/or, at least, one alcohol R2-[O-X]n-OH, where R1 is selected from among the unbranched and branched alkyl residues with 5 to 13 carbon atoms and the cycloalkyl residues with 5-6 carbon atoms, wherein the cycloalkyl residues are unsubstituted or may be substituted by, at least, one alkyl residue with 1-10 carbon atoms, R2 is selected from among the unbranched alkyl residues with 1-13 carbon atoms and the branched alkyl residues with 3-13 carbon atoms, X represents an unbranched alkylene group with 2-5 carbon atoms or a branched alkylene group with 3-5 carbon atoms, and n has a value of 1, 2 or 3, provided that the interaction is carried out in the presence of, at least, one catalyst selected among methansulfonate acid and toluene sulphonic acid, wherein methansulfonate acid has a sulfate content not exceeding 50 ppm, and wherein toluene sulphonic acid has a sulfate content less than 0.3%, when feeding gas being inert under the reaction conditions to the reaction system, at the temperature of the reaction mixture of 125 to 240°C, and when separating by distillation of, at least, a part of water produced during the reaction in the form of an azeotropic mixture with the used alcohol R1-OH and/or R2-[O-X]n, wherein distilled alcohol R1-OH and/or R2-[O-X]n-OH is, at least, partially recycled to the reaction system.EFFECT: improved method for producing carboxylic acid esters, allowing a more complete conversion after a short reaction time, and therefore a high yield of time unit per volume unit, the method is technically simple, carried out by using an inexpensive catalyst and avoiding costly processing steps.17 cl, 1 dwg, 19 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
Biodegradable highly-filled thermoplastic composition // 2635619
FIELD: biotechnology.SUBSTANCE: invention relates to the production of a biodegradable highly-filled thermoplastic composition based on polyethylene used in the production of films, consumer containers, dishes, household products operated both in contact with food products and for technical purposes. The composition comprises polyethylene and a biodegradable filler. As polyethylene, polyethylenes of the brands Sabic 318 B, Exceed 3518CB, LDPE 15813-020, and pro-degradant d2w is used as a biodegradable filler. Also, the composition further comprises a super concentrate of white CGP-004, an adhesive of INDOPOL, magnesium oxide in the nanofibre, and a secondary granulate.EFFECT: reduction in the biodegradation period.3 ex

Rubber composition for tyres and studless winter tyre // 2635608
FIELD: chemistry.SUBSTANCE: rubber composition for a tyre contains 100 wt parts of diene rubber (A); 30 to 100 wt parts of carbon black and/or a light filler (B) and 0.3 to 30 wt parts of cured product (C). At that, the cured product (C) is obtained by curing a cross-linkable oligomer or polymer (c1) immiscible with the diene rubber (A). The JIS A hardness of the cured product (C) is from 3 to 45. The cross-linkable oligomer or polymer (c1) is a polymer or copolymer based on polyether.EFFECT: creation of a rubber composition for a tyre, allowing to obtain a tyre having excellent performance characteristics on ice and excellent wear resistance.12 cl, 4 dwg, 4 tbl, 21 ex

Formaldehyde non-containing binding compositions with modified viscosity // 2635242
FIELD: chemistry.SUBSTANCE: binding compositions include a carbohydrate, a nitrogen-containing compound and a thickening agent. The binding compositions have a Brookfield viscosity of 7-50 centipoise at 20°C. Thickening agents may include modified celluloses such as hydroxyethyl cellulose (HEC) and carboxymethyl cellulose (CMC) and polysaccharides such as xanthan gum, guar gum and starches. The invention also describes the method for producing a nonwoven fibreglass mat and a fibreglass mat comprising the said binding composition.EFFECT: increasing the viscosity of carbohydrate-based binding compositions.23 cl, 6 dwg, 6 tbl, 4 ex
Cellulose compositions, methods for cellulose compositions production and products containing cellulose compositions // 2635162
FIELD: chemistry.SUBSTANCE: viscosity modification composition comprises cellulose slurries containing at least 60% of cellulose by dry weight, less than 10% of pectin by dry weight, and at least 5% of hemicellulose by dry weight. The composition can be concentrated to solids content of at least 25% by weight by compression at low pressure while retaining the ability to be resuspended in an aqueous medium.EFFECT: resulting aqueous medium retains the desired properties, increased viscosity, or increased dispersion of pigment particles, to the same extent as the composition prior to compression.22 cl, 7 dwg
ethod for producing superabsorbent containing microelements // 2634428
FIELD: chemistry.SUBSTANCE: 0.01-0.30 wt % of hydrogen peroxide is added to a solution of polysaccharide in an aqueous solution of acetic acid containing 0.1-2.5 wt % of iron chloride (II), or cobalt chloride (II), or nickel chloride (II), at the temperature of 20-40°C. The reaction mixture is then kept under vigorous stirring for 15-40 minutes. Then, a solution of acrylamide in (meth) acrylic acid or N,N-di(methyl)ethyloxyethyl methacrylate is introduced into the reaction mass in the ratio of 0.1:0.9÷0.9:0.1 of mole parts, and 0.1-10.0 wt % N,N-methylene-bis-acrylamide or diethylene glycol dimethacrylate, propylene glycol dimethacrylate. The reaction mixture is kept under stirring for 3 hours at the temperature of 20-40°C and freeze-dried. Chitosan or starch is used as polysaccharide.EFFECT: improving the soil structure and storing soil moisture in the arid regions, the invention allows to produce a polymer exhibiting superabsorbent properties and having the ability to absorb large amounts of water.2 cl, 4 ex

Enzyme producing of levulinic acid, levulinate complex esters, valerolactone and their derivatives // 2634120
FIELD: chemistry.SUBSTANCE: invention relates to the method for producing 2,4-dihydroxypentanoic acid comprising the conversion of pyruvate to 4-hydroxy-2-oxopentanoic acid by aldol addition and converting 4-hydroxy-2-oxopentanoic acid to 2,4-dihydroxypentanoic acid by chemical or enzymatic reduction.EFFECT: method allows 2,4-dihydroxypentanoic acid to be produced from pyruvate by two steps.10 cl, 13 tbl, 9 dwg
Plant plasticine // 2633885
FIELD: chemistry.SUBSTANCE: plasticine containing pigments, wax, softener is described, with the following composition, parts by weight: pigments 0.02-0.05, petrolatum 10-20, wax 5-20, starch 30-70, softener of natural origin 0.03-1.EFFECT: safe for a child, increasing softness and plasticity.4 cl, 5 ex
Functionalized polymer // 2632876
FIELD: chemistry.SUBSTANCE: method for providing a terminal functional group to a polymer comprises reacting a terminally active polymer that contains a polyene monomer unit, with α,β-ethylene unsaturated compound having the general formula (I) , where each R is independently a hydrogen atom or a C1-C10-alkyl group, M is an element of the 2-13 groups, y and z are integers under the condition that z is not zero and the sum of y+z is equal to the valence of M, and each X is independently R1, OR1, OC(O)R1, C(O)OR1 or NR12, where each R1 independently represents C1-C30-alkyl group, thereby providing the said terminal functional group of the said polymer. A terminally functional polymer prepared by the above method is also claimed.EFFECT: obtained polymer shows increased mutual activity with dispersed fillers and can be used in the production of vulcanizates.19 cl, 10 tbl, 48 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
odifying composition for asphalt-concrete mixture // 2632698
FIELD: chemistry.SUBSTANCE: modifying composition contains an active rubber powder, the filler is a mixture of ground mica and diatomite, an adhesive, a structuring agent, and a distillation residue of polyfluorinated alcohols-telomeres with the following component ratio, wt %: active rubber powder 60-75, ground mica 15-25, diatomite - 2-9, adhesive - 1-3, structuring agent - 1-3, distillation residue - 0.5-1.5. The invention also relates to an asphalt-concrete mixture containing mineral materials, bitumen, and a modifying composition in an amount of 0.3 to 0.7 wt % with respect to the total weight of the mineral material.EFFECT: improving the physical and mechanical characteristics of asphalt concrete.7 cl, 2 tbl
ethod of producing rubber compound // 2632692
FIELD: chemistry.SUBSTANCE: method involves mixing in a technical mixer of rubber crumb-powder from automotive chambers and tires with a size of 0.2-2.0 mm, latex, dimethoxymethane, dimethylether, dibenzoate, dye, water. Mixing is carried out for 30 minutes before the formation of the liquid rubber mixture. The components are added in a ratio, wt %: crumb-powder - 35; emulsifier latex liquid - 35; dimethoxymethane - 6; dimethylether - 5; dibenzoate - 5; dye - 7; water - 7. The mixture is ready to spray, cure for 20 minutes after application to the surface.EFFECT: invention makes it possible to obtain a liquid rubber mixture using rubber waste - worn automobile chambers and tires, which forms a protective coating on the surface of metal with good elasticity and flexibility, water resistance, resistance to temperature changes.1 cl
Amino-containing polymers with end carbinol groups // 2632425
FIELD: chemistry.SUBSTANCE: diene polymers contain at the beginning of the polymer chains the tertiary amino groups of formula (II), and also have the silane-containing carbinol groups of formula (III) d as the metal salts at the ends of the polymer chains. Moreover, R1, R2 are the same or different and are alkyl, cycloalkyl, aryl, alkaryl and aralkyl radicals, which may contain heteroatoms such as oxygen, nitrogen, sulfur and/or silicon. In the above mentioned formulas (II) and (III), Z is the divalent organic radical, which may contain, besides, the carbon and hydrogen atoms, heteroatoms such as oxygen, nitrogen, sulfur and/or silicon. Moreover, R3, R4, R5, R6 are the same or different and are hydrogen, alkyl, cycloalkyl, aryl, alkaryl and aralkyl radicals, which may contain heteroatoms such as oxygen, nitrogen, sulfur and/or silicon.EFFECT: expansion of application field.21 cl, 2 tbl, 3 ex
Stabilizing additive for crushed-mastic asphalt-concrete mixture // 2631819
FIELD: chemistry.SUBSTANCE: stabilizing additive in the form of granules includes, wt %: 85-90 of cellulosic fibre and 10-15 of the interaction product of higher carboxylic acids with polyethylenepolyamine and an organic solvent, the reactants for obtaining the reaction product are taken at the following component ratio, wt %: higher carboxylic acids 30-60, polyethylene polyamine 5-15, organic solvent 35-60.EFFECT: improving the performance properties of the binder through the formation of an internal coagulation framework in bitumen, increasing the adhesion of bitumen to the surface of the mineral material, and qualitative improving the physical and mechanical characteristics of crushed-mastic asphalt concrete.4 tbl

Foamed cellular polyolefin with high crystalline degree // 2631703
FIELD: chemistry.SUBSTANCE: foam material is made from the composition, containing the polyolefin dispersion with the high crystalline degree, the crosslinked binder and the surfactant. The foamed polymeric cellular material is produced by mechanical mixing with the composition air, containing the polyolefin dispersion with the high crystalline degree, the binder and the surfactant, capable to crosslinking. The resulting foam is dried at the temperature below the foam material melting point and above the binder crosslinking temperature. In the production of the cellular material, the composition additionally contains the fibers, non-swelling particles, or combinations thereof.EFFECT: production of foamed cellular material with open pores and with improved mechanical strength.10 cl, 8 dwg, 3 tbl
Production method of polymeric products, containing cyclopropane groups // 2631504
FIELD: chemistry.SUBSTANCE: production method of polymeric products, containing the cyclopropane groups, composed of the macromolecules of general formula (1): , having the units ratio (a+b):(c+d)=60-90:10-40], consists of 1,2-polybutadiene with diazomethane reaction in the organic solvent medium in the presence of the catalyst at the molar ratio of 1,2-polybutadiene: diazomethane: the catalyst equal to 1:1.0 - 3.0:0.0025 to 0.01, the process is characterized in that, the palladium (II) compounds - palladium chloride PdCl2 is used as the catalyst. As the 1,2-polybutadiene, the 1,2-polybutadiene of the atactic structure with the average molecular weight Mn from 800 to 70,000, the content of 1,2- and 1,4-polymerization links in the macromolecules is 60-90 and 10-40 mol. % or 1,2-polybutadiene syndiotactic structure with the syndiotacticity degree from 50 to 90%, the average molecular weight Mn from 35,000 to 75,000, the content of 1.2- and 1,4-polymerization links in the macromolecules is 75-95 and 5-25 mol %.EFFECT: production of polymer products, containing in macromolecules the unsubstituted cyclopropane groups, having the high functionalisation degree and different molecular weight, which can be intentionally altered in the wide range of values.2 cl, 1 tbl, 9 ex

Rubber mixture for tire treads // 2630800
FIELD: chemistry.SUBSTANCE: described the rubber mixture as one of the versions, containing the rubber component and the filler, for which the peak temperature on the temperature curve tanδ is -16.0°C or higher and -6.0°C or lower, the value of tanδ in the peak position is more than 1.13, tanδ at 0°C is 0.95 or more and the value, obtained by dividing the absolute value of the difference between the values of tan δat -5°C and tanδ at 5°C by the temperature difference between -5 and 5°C {|(tanδ at -5°C)-(tanδ at 5°C)|/10} (/°C) is less than 0.045/°C. The invention also relates to the rubber mixture embodiment, containing the rubber component and the filler, including at least two types of styrene-butadiene copolymer rubber, differing in bound styrene content, and the filler. The indicated mixture is the rubber compound for tire treads in which the difference between the bound styrene St (A) content in the styrene-butadiene copolymer rubber (A), having the high bound styrene content and the bound styrene content St (B) in the styrene-butadiene copolymer rubber (B), having the low bound styrene content, {St(A)-St(B)} is 6-22 wt % and tanδ of which at 0°C is 0.95 or more, and the value obtained by dividing the absolute value of the difference between the tan valuesδ at -5°C and tanδ at 5°C by the temperature difference between -5 and 5C° {|(tanδ at -5°C)-(tanδ at 5°C)|/10} (/°C) is less than 0.045/°C.EFFECT: invention provides the rubber mixtures production for tire treads, corresponding to higher requirements for low heat generation and wet braking efficiency.11 cl, 1 tbl, 1 dwg, 6 ex
Rubber mixture // 2630562
FIELD: chemistry.SUBSTANCE: rubber mixture contains the components at the following ratio, the mass parts: epichlorohydrin rubber T-3000 (20-100), epichlorohydrin rubber T-6000 (20-100), vulcanizing agent - sulfur (1.5-2.0), accelerators - captax (1.5-2.0) and tiuram (1.5-2.0), the activator - zinc oxide (2.5-3.0), the filler - carbon black N 220 (25.0-30.0), plasticiser - stearin (0.5-1.0) and norman 346 (2.5-3.0), the technological additive - sorbitan monostearate (1.5-2.0).EFFECT: improvement of the conditional tensile strength, elongation at break, tear resistance, and rubber resistance to sea water over the wide temperature range.2 tbl

New processing of white mineral material surface for application in plastics // 2630548
FIELD: chemistry.SUBSTANCE: invention relates to a polymer composition comprising, at least, one polymeric resin, which is, at least, one thermoplastic polymer and, at least, one white mineral material with a reactive surface that is calcium carbonate. The invention also relates to the method for producing calcium carbonate with a reactive surface, calcium carbonate produced by the process, fibre and/or film and/or filament and/or a breathable film comprising a polymer composition and/or calcium carbonate with a reactive surface. Herewith the mixture of phosphoric acid esters is used to treat the surface to reduce the hydrophilicity and/or the tendency to moisture absorption of the treated particles surface.EFFECT: production of a polymer composition that imparts improved mechanical properties to final products and low hydrophilicity.15 cl, 1 dwg, 8 tbl, 4 ex

Additive and method for resistance to harmful effects of freezing and thawing and resistance to harmful effects of delamination of binding compositions // 2629387
FIELD: construction.SUBSTANCE: group of inventions refers to an additive for resistance to harmful effects of freezing and thawing and resistance to harmful effects of delamination for a binding composition, which contains aqueous suspension containing a water-insoluble superabsorbent polymer and swellable polymeric microspheres. The composition comprises forming a mixture of hydraulic cement and an additive containing the aqueous suspension of a water-insoluble superabsorbent polymer and swollen polymeric microspheres. The polymer microspheres are used to create voids with controlled size within binding compositions.EFFECT: resistance of the composition to the harmful effects of freezing and thawing and resistance to harmful effects of delamination of the binding composition.11 cl, 4 tbl, 2 dwg, 26 ex
Tire element, hydrogenated polymer based on conjugated diene and polymer composition // 2628603
FIELD: chemistry.SUBSTANCE: tire element is a tire element obtained by subjecting to a treatment for obtaining cross links of a composition containing a hydrogenated polymer based on a conjugated diene and a cross-linking agent. The used hydrogenated polymer based on conjugated diene is a hydrogenation product of a polymer based on conjugated diene which contains structural units derived from butadiene and has a functional group at one end of the chain or at both ends of the chain. The functional group is one or more groups selected from the group consisting of an amino group, an imino group, a pyridyl group, a phosphino group, a thiol group and a hydrocarbyloxysilyl group.EFFECT: tire element is satisfactory with respect to the minimum fuel consumption coefficient and has a higher strength and better abrasion resistance than conventional tire elements.20 cl, 4 tbl, 5 ex

Dry cellulose fibers and the process of making the same // 2628382
FIELD: chemistry.SUBSTANCE: dry cellulose fibers contain at least 50 wt % of fibers having a length of up to 350 mcm and a diameter in the range of 100-500 nm, where the fibers do not contain additives, are not derivatized and are redispersible in water. A film of dry cellulose fibers containing the described fibers is shown where the film is water dispersible. Also described is a process for producing a dry film of cellulose fibers, comprising preparing a liquid slurry from the above-described cellulosic fibers obtained by multi-step highly refined wood or plant fibers and retaining more than 90% of the fibers on the forming section of the papermaking machine in which the fibers do not contain additives and are not derivatized. The film can be converted into powders or flakes for transport, storage or subsequent use.EFFECT: creation of repeatedly water-dispersible fibers of fibrillated cellulose, obtained without the use of chemical additives and derivatization.23 cl, 3 dwg, 5 tbl, 5 ex
ethod of obtaining polydienes and polydiene copolymers with reduced purity on cold // 2627705
FIELD: chemistry.SUBSTANCE: method for preparing the bound polymer comprises the steps of: (i) polymerizing a conjugated diene monomer and optionally a copolymerizable monomer thereto to produce a polymer containing a reactive end group; (ii) reacting the reactive end group of the polymer with a polyisocyanate having an amount of functional groups of X to form an intermediate polymeric product; and (iii) reacting mentioned intermediate polymer product with a polyol having a functional group number of Y with a bound polymer product, wherein X+Y≥5. A bound polymer and a tire component are also claimed.EFFECT: obtained polymers exhibit greater resistance to cold flow, have good technological properties of cured mixtures.18 cl, 4 tbl

Environmentally safe packing material based on polylactide // 2626022
FIELD: packaging industry.SUBSTANCE: packing material based on polylactide is created by mixing polylactide with dispersed filler SiO2 (aerosil) with a concentration of 1.9-2.1% by volume and a particle size of 12 nm. Mixing was carried out for 5 minutes at a temperature of 180°C. Further, the finished composition was placed in a hot press at a pressing temperature of 180°C and a pressing pressure of 15 MPa. The films were cooled for 1 min, then placed in a positive corona discharge field, charged at room temperature or at a temperature above the polylactide glass transition temperature for 5 min to a surface potential of 1.3-1.5 kV.EFFECT: production of active packaging on the basis of biodegradable materials with increased electret effect.4 dwg, 2 ex
Rezinobitum composition // 2625867
FIELD: chemistry.SUBSTANCE: composition includes bitumen and not less than 8 wt % of mechanically activated rubber chips with a characteristic size 0.5 mm. In this process, at the temperature of 120-130°C for 20-30 min the composition is exposed to a low-frequency ultrasound with a power density of 0.5-1.5 W/cm3.EFFECT: increase in the amount of rubber crumb introduced into the composition, a decrease in the bitumen modification temperature and a shortening of the process time, acceleration of the impregnation of the rubber crumb and the production of modified bitumen in the form of a high-quality product.2 ex
Thermoplastic plasticised modified cellulose acetate and method of producing thermoplastic plastified modified cellulose acetate // 2624692
FIELD: chemistry.SUBSTANCE: thermoplastic plasticised modified cellulose acetate consists of cellulose acetate, a low-molecular plasticiser, a stabiliser, a reactive modifying agent-oligoether diisocyanate. As the oligoether diisocyanate, the reaction product of polyethylene-polybutylene glycol adipate with a molecular weight of 1500-2500 with MDI is used at a molar ratio of oligoether diisocyanate to cellulose acetate equal to (1:0.4 to 1:4). In a particular embodiment of the invention, the thermoplastic plasticized modified cellulose acetate contains dyes and fillers. The invention also relates to a process for the production of thermoplastic plasticised modified cellulose acetate, which is carried out in a single rotary-type mixer at a temperature of 155-165°C.EFFECT: increasing physicomechanical and thermophysical properties of products based on thermoplastic plasticised modified cellulose acetate, which are preserved during their long-term operation.3 cl, 1 tbl
ethod for manufacturing rubber tiles // 2624645
FIELD: construction.SUBSTANCE: method for manufacturing rubber tiles comprises preparing the mixture by mixing the filler from the rubber crumb and the polyurethane-based binder, while simultaneously and separately preparing the mixtures for the base layer and the upper coloured layer. In the mixture for the base layer, the filler of rubber crumb with the fraction of 1-2 mm is used; in the mixture for the top coloured layer, the filler of rubber crumb with the fraction of 0.5-1 mm and a pigmentary dye are used. While preparing the mixture for the top coloured layer, with the exception of the red and the grey colour, the mixture bleaching process is first carried out by means of adding titanium dioxide and then mixing the bleached mixture with the pigment dye; thereinafter, the mixture for the top coloured layer and the mixture for the base layer are subsequently loaded into the mould. The moulds with the mixtures are installed in vertical rows, pressed under pressure, then the resulting mixture is maintained until completely cured.EFFECT: invention allows to improve the quality of rubber tiles due to obtaining a smoother and more dense surface, to reduce the consumption of mounting glue, to eliminate the formation of lumps when mixing, to simplify the production line.6 cl, 5 ex
Vulcanized compositions based on epoxy-containing group of nitrile rubber // 2622655
FIELD: chemistry.SUBSTANCE: composition comprises at least one epoxy group containing nitrile rubber which contains repeating units of one conjugated diene, at least one α,β-unsaturated nitrile and optionally one or more other copolymerizable monomers, but which lacks repeating units of nonconjugated cyclic polyenes; as crosslinking agent at least one Lewis acid; and at least one cross-linking accelerator selected from the group consisting thiurams, ksatogenaty, thiourea, dithiocarbamates and carbamates.EFFECT: invention produces vulcanizates with favorable performance compression set at room temperature, and at the same time a high tensile stress and elongation at break optimal.6 cl, 14 tbl, 4 ex
Photo-catalytic coating of protective rubber-and-canvas material // 2622439
FIELD: chemistry.SUBSTANCE: photo-catalytic coating of a protective rubber-fabric material used for the manufacture of personal protective equipment, shelters for military equipment, awnings for trucks, awnings, tents, obtained from a polymer composition based on high-molecular-weight methyl vinyl silicone "СКТВщ" and fillers - aluminium hydroxide, modified with vinylsilane, and aerosil grade A-300 with the following ratio of components by wt %: high molecular weight methylvinylsiloxane "СКТВщ" rubber 100, aluminium hydroxide modified with vinylsilane 80-120, aerosil grade A-300 20-40, or a polymer composition based on polyurethane rubber "СКУ-8 ТБ" and catalyst - polyisocyanate grade B (PIC) at the following ratio of components by wt %: Polyurethane rubber "СКУ-8 ТБ" 100, polyisocyanate grade B (PIC) 0.18-0.22, or a polymer composition based on fluorine rubber "СКФ-26" and fluoroplastic F-42 with the following ratio of components in parts by weight: fluororubber "СКФ-26" 100, fluoropolymer F-42 40-42, wherein the polymer composition contains nano-sized titanium dioxide at a ratio, by wt %, nanosized titanium dioxide: polymer composition = (1:2)-(1:4).EFFECT: preparation of a photo-catalytic coating of a protective rubber-and-canvas material having the effect of photo-catalytic decomposition of toxic chemicals.1 tbl
Emulsion coagulant and tire puncture removal kit with its use // 2622123
FIELD: chemistry.SUBSTANCE: coagulant contains magnesium oxide, a silane coupling agent and at least one component selected from the group consisting of cellulose and magnesium hydroxide. Kit for eliminating puncture of the tire and contains the coagulant tire puncture sealant selected from rubber latexes and synthetic resin emulsions. The weight ratio of magnesium oxide and silane coupling agent is from 100: 0.5 to 100: 15.EFFECT: coagulant can effectively cause coagulation of the sealant to the tire puncture by a mechanism different from conventional coagulants, regardless of the content of antifreeze in the composition of the sealant.5 cl, 4 tbl
ethod of obtaining functionalized and branched elastomeric copolymers and their use in vulcanizable elastomeric compositions // 2621672
FIELD: chemistry.SUBSTANCE: method for obtaining a functionalized and branched elastomeric copolymer comprises the following stages: (a) anionic copolymerization of at least one conjugated diene monomer and at least one vinylarene in the presence of at least one hydrocarbon solvent, at least a lithium initiator and at least one polar modifier with obtaining a solution containing the elastomeric copolymer; (b) reacting at least 10 wt % of the polymer chains of the elastomeric copolymer obtained at the stage (a), at least one compound containing at least one functional group selected from epoxides, ketones, esters, aldehydes, with obtaining a solution containing the functionalized elastomeric copolymer; (c) adding to the solution obtained at the stage (b) the lithium initiator in a quantity exceeding from 1 to 4 times the molar quantity of the initiator used at the stage (a), as well as bromine compounds of the general formula (I): R-Br (I), where R is a linear or a branched C1-C30 alkyl group, a C3-C30 cycloalkyl group, a C6-C30 aryl group. A vulcanizable elastomeric composition and a vulcanized final product are claimed as well.EFFECT: copolymer obtained by the method provides a vulcanizable composition with good dynamic and mechanical properties and better processability.20 cl, 3 tbl, 8 ex
Polyurethane rubber mixture (versions) // 2619705
FIELD: chemistry.SUBSTANCE: polyurethane rubber mixture in the first version was obtained on the basis of saturated urethane rubber, 100 wt p of which includes stearic acid in an amount of 1.0 parts by weight, di-tert-butyl peroxyisopropylbenzene in an amount of 12.5 wt p and carbon black in an amount of 42.0 wt p in the second version, the polyurethane rubber mixture is obtained on the basis of saturated urethane rubber, per 100 wt p which includes stearic acid in an amount of 1.0 wt p, di-tert-butyl peroxyisopropylbenzene in an amount of 12.5 wt p, silica filler in an amount of 35.0 wt p and iron-oxide pigment in an amount of 3.0 wt p.EFFECT: reducing the explosion hazard of the production process.3 cl, 2 tbl, 3 ex
Elastomeric composition for rubber seals production // 2619693
FIELD: chemistry.SUBSTANCE: elastomeric composition for the production of rubber seals is described, which contains ethylene-propylene rubber and a water expanding additive represented by cellulose modified by an aqueous sodium hydroxide solution at the following ratio of the components, wt %: ethylene propylene rubber - 30-70, modified cellulose - 70-30.EFFECT: obtaining a composition for producing rubber seals of improved quality.5 tbl
 
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