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Catalyst composition for ethylene oligomerisation and oligomerisation method Present invention relates to a catalyst composition for ethylene oligomerisation and oligomerisation methods. The catalyst composition includes iron (II), cobalt (II) or nickel (II) chloride coordinated with 2-amino-1,10-phenanthroline of formula (I) as a base catalyst and triethylaluminium as a co-catalyst. The ethylene oligomerisation method employs said catalyst composition and the molar ratio of aluminium metal in the co-catalyst to the content of the atoms of the central metal in the base catalyst ranges from 101 to less than 200 or from 30 to 50. Another ethylene oligomerisation method employs the described catalyst composition and the ethylene oligomerisation temperature ranges from -10 to 19°C. |
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Method of producing polymer products containing unsubstituted cyclopropane groups in macromolecules Invention relates to a method of producing polymer products with unsubstituted cyclopropane groups of general formula (1) , where (a+b):(c+d)=60-95:5-40 mol %. The method includes reacting atactic-structure 1,2-polybutadiene with a diazo-compound in a medium of methylene chloride in the presence of a metal complex catalyst at 0-5°C. The molar ratio 1,2-polybutadiene:diazomethane:catalyst is equal to 1:0.5-2.0:0.01. As the catalyst copper (II) triflate - Cu(OTf)2 or a copper (I) triflate and benzene complex - (CuOTf)·0,5C6H6 are used. |
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Rubber mixture and tyre manufactured with its application Invention relates to rubber mixture and tyre. Rubber mixture contains caoutchouc component (H) with number average molecular weight higher than 130000 and polymer (B), obtained from polymer latex (A), prepared by emulsion polymerisation, with number average molecular weight 1000-130000. Component (H) contains polymer (D), obtained from polymer latex (C). Polymers (B) and (D) are used in form of mixture of latexes in rubber mixture. After that, drying and coagulation of mixture are carried out. |
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Invention describes a copolymer containing monomer units A having a cyano-containing side group, monomer units B having an alkyl and an aryl film-forming side group, monomer units C having a side chain containing poly(ethylene glycol), poly(propylene glycol) and/or statistical poly(ethylene glycol-propylene glycol) and optionally monomer units D having at least one functional group capable of undergoing a crosslinking reaction via cationic polymerisation. |
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Claimed invention relates to materials for ophthalmological or otorhinolaryngological devices. Described is polymer material for ophthalmological or otorhinolaryngological devices, containing a) 50-93% (w/w) of polymerised monomer of the following structure: in which: A represents H or CH3; B represents (CH2)m or [O(CH3)2]z; m equals 2-6; z equals 1-10; Y is absent or represents O, S or NR', on condition that if Y represents O, S or NR′, then B represents (CH2)m; R' represents H, CH3, Cn'H2n'+1 iso-OC3H7, C6H5 or CH2C6H5; n'=1-10; w equals 0-6, on condition that m+w≤8; and D represents H, Cl, Br, C1-C4 alkyl, C1-C4 alkoxy, C6H5 or CH2C6H5; b) 1-5% (w/w) of highly molecular linear polyethyleneglycol component of the following structure: in which: X, X' are independently absent or represent O or NH; R, R' are independently absent or represent (CH2)p; p=1-3; Q, Q' are independently absent or represent C(=O)NHCH2CH2O; A'=H or CH3; G represents H, C1-C4 alkyl or R'-X'-Q'-C(=O)C(=CH2)A'; and n=45-225, when G represents H, C1-C4 alkyl in the remaining cases n=51-225; and c) polymerised cross-linking means. Also described is ophthalmological or otophinolaryngological device, which contains said polymer material, where ophthalmological or otophinolaryngological device is selected from the group, consisting of intraocular lenses, contact lenses, keratoprostheses, corneal implants or rings, ontological ventilation tubes and nasal implants. |
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Visible radiation absorbers for ophthalmic lenses materials Invention relates to azocompounds, corresponding to general formula, represented below, in which R1 represents C(O)C(CH3)=CH2;R2 represents H; R3 represents C1-C4alkyl or XOC(O)C(CH3)=CH2; X represents C1-C4alkyl. The invention also relates to material for ophthalmological device, which contains said azocompound, to ophthalmological device, made of said material, and intraocular lens, made of material that includes azocompound. |
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Power supply cable with polypropylene High-voltage supply cable (HV) or superhigh-voltage supply cable is described. The cable includes conductor surrounded by at least one layer including polypropylene. Polypropylene includes nanosize fragments of catalyst, which source of origin is solid catalyst system. Nanosize fragments of catalyst have average size of particles d50 less than 1 mcm as measured by Coulter counter LS200 at indoor temperature with n-heptane as medium. Cable manufacturing method is also described. |
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Method for addition polymerisation of norbornene Method includes polymerisation of norbornene using a catalyst obtained by reacting a cationic palladium complex and boron trifluoride etherate in an organic solvent medium in the presence of norbornene. Components are mixed in the following order: adding, to a norbornene solution in an organic solvent, e.g. methylene chloride, a solution of a cationic palladium complex in an organic solvent, e.g. methylene chloride, and then adding boron trifluoride etherate in pure form or in the form of a solution in an organic solvent, e.g. methylene chloride. The catalyst components used are palladium tetrafluoroborate (acetylacetonato)(α-diimine) of general formula [(acac)Pd(N∧N)]BF4, where acac is acetylacetonate, N,N are α-diimine ligands, such as bis[N-(phenyl)imino]acenaphthene, bis[N-(2,6-dimethylphenyl)imino]acenaphthene, N,N-(1,2-diphenylethane -1,2-diilydene)bis(2,6-dimethylaniline), bis[N-(2,6-diisopropylphenyl)imino]acenaphthene, N,N-(2,3-butanediilydene)bis(2,6-dimethylaniline), N,N-(2,3-butanediilydene)bis(2,6-diisopropylaniline). Optimum process conditions: molar ratio of boron to palladium, B:Pd=15:1-50:1, preferably B:Pd=25:1, with molar ratio of norbornene to palladium, NB/Pd=10000:1-50000:1, preferably NB/Pd=20000, at temperature 20-45°C. |
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Described is a method for gas-phase polymerisation of ethylene and copolymerisation of ethylene with alpha-olefins in the presence of a supported catalyst with particle size ≥20 mcm, obtained by reacting a solution of an organomagnesium compound with a compound which enables to convert the organomagnesium compound into a solid magnesium-containing support, followed by treating the solid product with a titanium compound, where as the organomagnesium compound butylmagnesium chloride in an ether solution R2O is used, where R is butyl or i-amyl, and the compound required to convert the organomagnesium compound into a solid magnesium-containing support is a composition which includes a reaction product of an alkylchlorosilane composition R'kSiCl4-k, where R' is an alkyl or phenyl, k=1, 2, and silicon tetraalkoxide Si(OEt)4 in molar ratio SiCl/Si(OEt)=0.4-14, molar ratio Si/Mg=1-2 and temperature 10-40°C. |
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Hydrophobic materials with low stickiness for ophthalmological devices Invention relates to hydrophobic acrylic materials with low stickiness and with high refractive index, suitable for application as intraocular lens materials. Claimed is copolymer material for ophthalmological device, obtained by polymerisation of mixture, which contains (wt %): a) arylacryl hydrophobic monomer (50% or more); b) acryloxy-terminated poly(ethyleneglycol)-polydimethylsiloxane-poly(ethyleneglycol) ABA block-copolymer (0,3-10%); c) siloxane monomer (5-30%); d) hydrophilic monomer (2-20%); e) cross-linking monomer and f) chemically active UF absorber. Intraocular lenses, containing said material, are also claimed. |
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Invention relates to silicone-acrylic copolymers and compositions thereof. Disclosed novel silicon-acrylic copolymer, which contains a silicone polymer covalently bonded to an acrylic polymer through a -Si-O-Si- bond with the ratio of the silicone and acrylic polymers of 50:1 to 1:50. The acrylic polymer contains at least one silane or siloxane functional group, and the silicone polymer is a polysiloxane with diorganic substitutes (dimethyl, methylvinyl, methylphenyl, diphenyl, methylethyl or 3,3,3-trifluoropropyl) and a terminal functional group selected from a hydroxyl, alkoxyl, vinyl and hydride functional group or a mixture thereof. Also disclosed is a method of producing said copolymer, as well as a composition and an article containing said copolymer. |
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Catalytic composition contains an organometallic complex of titanium of respective general formula [Ti(OR)n(Y)(4-n)], wherein: Y is a hydrocarbonyl radical containing from 1 to 30 carbon atoms, or a radical specified in a group consisting of halogenides, alkoxy R'O-, amido R'2N- and carboxylates R'COO-, wherein R' is a hydrocarbyl radical, and n can have integral values from 1 to 4; ligand -OR is an organic compound specified in a family of alkoxy ligands, general structure of which is O-(CR10R11)n-X-L, wherein: functional group L is a group containing a heteroatom specified in nitrogen, oxygen, phosphorus, sulphur, arsenic and stibium, or an aromatic group; the group X is the hydrocarbon group (CR7R8), an oxygen atom or a group containing a nitrogen atom -NR9; the groups R7, R8, R9, R10 and R11 mean a hydrogen atom or a hydrocarbon chain, either cyclic or noncyclic, containing from 1 to 30 hydrocarbon atoms and optionally a heteroatom; the above group (CR10R11)n is specified among the following groups: -CH2-, -(CH2)2-, -(CH2)3-, -(CH2)4-, -(CH2)5-, -C(CH3)2-, - C(CH3)2-CH2, -C(CH3)2-CH2-CH2, -C(CF3)2-, -C(CF3)2-CH2 and -C(CF3)2-CH2-CH2. |
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Method of obtaining water-soluble polymer complexes of radioisotopes First polymer carrier with grafted biological vector and chelate units for radiometal binding is obtained. Then, procedure of radio-marking is carried out. Interaction of polymer carrier of chelate units with radioactive component is carried out in alcohol, in water or water-alcohol solution in inert gas atmosphere at temperature 70°C for 20 minutes. As polymer carrier applied is water-soluble copolymer of N-vinylpyrrolidone with N-allylamine with molecular weight 5000-50000 Da, content of chelate units in from of iminodiacetate fragments of iminodiacetic acid 1-20 mol %, content of vinylpyrrolidone m = 99-80 mol % and allylamine n = 1-20 mol %. As radioactive component applied are compounds of transition metals and lanthanides in form of following line [99mTc(CO)3]+, [188Re(CO)3]+, [161Tb(CO)3]+. |
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Bimodal neodymium-catalysed polybutadienes Invention relates to high-molecular weight bimodal neodymium-catalysed polybutadienes. A high-molecular weight bimodal neodymium-catalysed polybutadiene has high content of cis-1,4-units >95% and low content of 1,2-vinyl-units <1%. The polybutadiene contains a linear polymer main fraction and a long-chain branched polymer fraction. The polymer main fraction has an inertial radius increase depending on molecular weight in double logarithmic graph greater than 0.5, and the long-chain branched polymer fraction lower than 0.3. |
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Said composition is a reaction product of the following three components: A) a titanium halide, B) an organoaluminium compound, primarily consisting of alkyl aluminium of general formula AlR3, and C) an electron donor consisting of a polyether of general formula R0O(R1O)pR2 (I) and/or a tetrahydrofurfuryl ether of general formula |
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Method of producing polydienes Invention relates to a method of producing polydienes. The method of producing polydiene comprises the following steps: (i) obtaining an active catalyst by combining a lanthanide-containing compound, an alkylating agent and a halogen source, substantially in the absence of an amine, and (ii) polymerising a conjugated diene monomer in the presence of the active catalyst and an amine, where the amine is added before 5% of the conjugated diene monomer is polymerised. The invention includes an alternative version of the method. |
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Method of producing nanoparticles of cross-linked poly-n-vinylcaprolactam Method includes preparing a solution of a hydrophobically modified polyacrylamide with molecular weight of 300000-1500000, adding N-vinylcaprolactam and N,N-methylene-bis-acrylamide in toluene, and then dispersing with a mechanical mixer at a rate of 200-300 rpm or an ultrasonic disperser, wherein polymerisation is carried out in the presence of sodium persulphate for 5-6 hours, and the obtained aqueous dispersion is dialysed to pH 6.0-6.5. |
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Ptfe material having corona shielding Present invention relates to polytetrafluoroethylene (PTFE) based material, a method of producing said material, use of said material to make an electric cable and a method of making an electric cable. The PTFE based material according to the invention contains PTFE, a metal oxide, a lubricant and a wetting agent, and has density higher than 1.45. As the lubricant a hydrocarbon based liquid is used. As the wetting agent a fatty alcohol is used. |
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Method of producing diene polymers or statistical vinylarene-diene copolymers Invention relates to a method of producing diene (co)polymers. A method of producing diene polymers or vinylarene-diene statistical copolymers includes anionic (co)polymerisation in hydrocarbon solvents, at least one conjugated diene monomer, optionally in the presence of a vinyl aryl monomer, and using a compound belonging to a group of alkyl lithium compounds as an initiator, the method being characterised by that the entire alkyl lithium initiator is modified onsite through a reaction with a compound of general formula (I): Rm-(X-H)n (I), where R is (C2-C20)-(cyclo)alkyl or (C6-C20)-aromatic radical, X is a heteroatom belonging to the VIA group of the periodic table, n is an integer equal to or greater than 1, m is an integer ≥1, which depends on the valence of the heteroatom X. |
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Acrylate polymer for increasing viscosity index Invention relates to (meth)acrylate polymers used to increase viscosity index and to lubricating oil compositions containing said polymers. Disclosed (meth)acrylate polymer for increasing viscosity index, which contains: a) 5-60 wt % repeating links of (meth)acrylate derivatives of formula (I) wherein R is hydrogen or methyl and R1 is methyl, b) 15-70 wt % repeating links of (meth)acrylate derivatives of formula (II) wherein R is hydrogen or methyl, R2 is an alkyl residue with 7-30 carbon atoms, and c) 25-70 wt % repeating links of (meth)acrylate derivatives of formula (III) wherein R is hydrogen or methyl, n is a number from 2 to 500, A is an alkylene with 2-4 carbon atoms and R3 is a hydrogen atom or an alkyl residue with 1-4 carbon atoms. The invention also discloses a novel lubricating oil composition, a method of producing the disclosed (meth)acrylate polymers and versions of use thereof. |
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Invention relates to the method and system for separation of the hydrocarbons contained in the effluent of the polymerisation process. the method includes pressure decreasing of the ethylene flow from pressure at least 3.4MPa to maximum pressure 1.4MPa, cooling of the off-gas including monomer by heat exchange with LP ethylene flow with creation of the first condensate including part of monomer caught by the first light gas, extraction of the first condensate and first light gas, extraction of the first condensate from the first light gas, LP ethylene flow compression to pressure at least 2.4 MPa, and passage of the compressed ethylene flow to the polymerisation reactor. |
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Method for obtaining semi-crystalline polymer with nucleating agents of crystallisation Invention relates to method of obtaining semi-crystalline polyolefin with nucleating agents of crystallisation by coordination polymerisation. Nucleating agent is processed with surface-active substance or modified with organoaluminium compound and dosed into polymerisation reactor in form of suspension in non-polar hydrocarbon or in form of suspension or solution in organoaluminium compound. Nucleating agent is introduced as part of catalytic system directly into polymerisation reactor, in which further synthesis is realised, and where nucleating agent represents inorganic substance, selected from the group, including talc, CaO, MgO, TiO2, silicon dioxide (SiO2), aluminium oxide (Al2O3), clay, graphite, carbon nanotubes and their combination, and where organic mucleating agent represents nucleating agent of non-sorbitol type. |
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Disclosed is an initiating system for synthesis of diene rubber with high content of vinyl groups, use thereof in a method of producing homopolydienes and copolydienes with high content of vinyl groups and the method of producing diene polymers itself. An initiating system for anionic polymerisation for producing homopolydienes and/or copolydienes with content of vinyl groups per diene component higher than 80% contains: (A) at least one organolithium compound, (B) at least one di-(aminoalkyl) ether, which is a compound of formula (II): wherein R1, R2, R3, R4 are identical or different and respectively denote an alkyl with 1-12 carbon atoms, a cycloalkyl with 3-8 carbon atoms, an aryl with 6-10 carbon atoms or an aralkyl with 7-15 carbon atoms, and m and n are identical of different and denote integers from 1 to 8, and (C) at least one sodium alkoxide and/or sodium phenoxide. |
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Claimed rubber mix contains 100 wt % of rubber component and 5-150 wt % of silicon dioxide. Sid rubber component contains 5-90 wt % of coupled diene polymer, 5-70 wt % of natural rubber and 5-60 wt % of butadiene rubber proceeding from 100 wt % of the rubber component. Coupled diene polymer contains the structural link based thereon and structural link described by the formula (I) |
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Aqueous styrene-acrylic dispersion and preparation method thereof Invention relates to an aqueous styrene-acrylic dispersion used to produce paint materials, adhesives, construction mixtures, particularly as a binding component for water-proofing and thin-layer energy-saving and heat-insulating coatings. The aqueous styrene-acrylic dispersion is obtained from a mixture of monomers: styrene, butyl acrylate, acrylic acid, glycidyl methacrylate and 2-hydroxyethyl methacrylate in the presence of an emulsifier - synthanol DS-10, an initiator - ammonium persulphate, distilled water, with the following ratio of components, pts.wt: styrene 19.56-20.49, butyl acrylate 16.27-17.05, acrylic acid 0.40-0.42, synthanol DS-10 0.65-0.68, glycidyl methacrylate 3.85-9.37, 2-hydroxyethyl methacrylate 3.65-5.31, ammonium persulphate 0.14-0.15, distilled water 49.96-53.68, wherein the obtained dispersion is neutralised with a mixture of triethanolamine and ammonia water in ratio of 1:1 to pH=5-6. A method of preparing the dispersion is also disclosed. |
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Present invention relates to a method of lubricating a transmission system for a wind turbine with polyalkyl(meth)acrylates as a lubricant, wherein the lubricant used contains at least 30 wt % polyalkyl(meth)acrylate with respect to the total weight of the lubricant, wherein the polyalkyl(meth)acrylate contains: a) 0-25 wt % repeating units of (meth)-acrylate derivatives of formula |
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Method for modification of petroleum polymer resins Composition for production of targets-plates for trap shooting consists of : (1) petroleum polymer resin or mixture of petroleum polymer resins 17-19 wt %, (2) petroleum bitumen of one type or mixture with softening temperature from 90 to 135°C 1-3 wt %, (3) inorganic powder-like filler 80 wt % and (4) ether plasticiser 1 wt % of the sum of components (1)-(3). Also claimed is method for modification of petroleum polymer resins. |
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Method of modifying polymer porous material and composite material obtained using said method Invention relates to polymer material engineering, particularly to modification of porous materials by forming coatings. Modified porous polymer material can be used to make components for use in different scientific and engineering fields, for example wicks for raising hydrocarbon liquids through a capillary effect, filter elements, carrier matrix for active low-molecular components as part of structures bearing a power load, for example, wings of a light aeroplane. The disclosed method includes forming, on the surface of structural elements of a matrix of the initial porous material, a continuous coating from a polymer with physical and mechanical properties different from that of the polymer of the matrix of the initial porous material. The coating is formed as a result of synthesis of a heat-resistant polymer - poly-para-xylylene via gas-phase polymerisation on the surface. Synthesis of a film of poly-para-xylylene is carried out at temperature of the walls of the polymerisation chamber of 20-25°C and pressure of the gaseous monomer (para-xylylene) of about 5-8 Pa, wherein directed movement of monomer molecules through the matrix of the initial porous material is facilitated in the chamber. Also declared is a composite porous material containing a matrix with through porosity and a continuous coating of poly-para-xylylene with thickness of 0.2-0.3 mm on the surface of structural matrix elements. The technical result is increasing heat resistance of the modified porous plastic 2-3-fold to 250-300°C (Vicat softening point); uniaxial compression strength of the modified material is significantly greater than that of the initial material ( 2 times greater); resistance of the modified porous plastic to solvents increases since the modifying coating dissolves at high temperature only in very strong solvents. |
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Invention relates to polymer, which represents synthesised polyisoprene, method of its obtaining, rubber mixture, which contains such polymer, and tyre, which contains said rubber mixture. Polymer by invention has average molecular weight (Mn) 1.5 million or more according to data of gel-penetrative chromatography (GPC) method. |
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Invention relates to polymer, which represents synthesised polyisoprene or isoprene copolymer, rubber mixture, which contains such polymer, and tyre, which contains said rubber mixture. Polymer by invention contains residual catalyst, obtained from catalyst, applied in polymerisation in quantity 300 ppm or less. |
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Invention relates to polymer powder degassing. Lock is described for use during the polymer powder degassing in the degassing vessel. Lock includes temperature measurement of the polymer powder inside or at output of the degassing vessel. Comparison of the measured value with limit value to determine, weather the measured value exceeds the limit value or not. If the measured temperature is below the specified limit value executing of one or more actions directed to reduce concentration of the hydrocarbons in the polymer powder exiting the degassing vessel, and/or prevention of the polymer powder unloading from the vessel. Besides, the degassing method of the polymer powder in the degassing vessel is described. |
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Invention relates a catalyst component for ethylene polymerisation, a method of producing said component, a catalyst and a polymerisation method. The catalyst component includes a reaction product of (1) a magnesium complex, which is a magnesium halide solution in a solvent system; (2) at least one titanium compound of formula Ti(OR)aXb, where R, X, a, b are given in the claim, and (3) at least one organosilicon compound of formula (I), where the values of radicals are given in the claim. The solvent system is a system comprising at least one organic epoxy compound, at least one organoboron compound, at least one alcohol and optionally at least one inert diluent, or a system which includes at least one organic epoxy compound, at least one organophosphorus compound, at least one alcohol and optionally at least one inert diluent. |
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Phosphonium ionomers containing vinyl side groups and methods for production thereof Invention relates to an ionomer, a method of producing an ionomer and a method of producing a vulcanised polymer. The ionomer contains a reaction product of halogenated isoolefin copolymer and at least one phosphorus-based nucleophile containing at least one vinyl side group. |
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Method of producing isotactic polypropylene Described is a suspension polymerisation method for producing polypropylene (PP) having a decalin-soluble (DS) fraction equal or less 2.5 wt %. The method includes at least two reactors connected in series. A Ziegler-Natta catalyst (ZN) containing an external donor agent (EDA), propylene and optionally ethylene and/or C4-C12 α-olefin, a diluent (D), containing a donor agent (DA), are fed into a first reactor and polymerisation of said polypropylene is carried out in at least said first reactor. Polymerisation in the first reactor is not preliminary polymerisation. Also described is a polymerisation method, where the weight ratio of polypropylene (PP) obtained in the first reactor (R1) and the Ziegler-Natta catalyst (ZN) catalyst present in the first reactor (R1) [mass of polypropylene (PP)/mass of Ziegler-Natta catalyst (ZN) catalyst], is greater than 1000/1 [g/g]. |
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Method of obtaining acryl and methacryl polymers Invention relates to highly molecular compounds and to method of obtaining acryl and methacryl polymers. Polymers are applied in obtaining composite materials, coatings and paint-and-varnish products. Method of obtaining acryl and methacryl polymers is realised by polymerisation of monomer in solution of polar organic solvent, which does not contain mobile halogen atom, in presence of organic initiator, containing mobile halogen atom, organic ligand, which contains 2 or more nitrogen atoms, and catalyst, based on metallic copper, with method being characterised by the fact that catalyst is used, applied in form of mirror on internal surface of reaction vessel and/or on external surface of substrate, placed in reaction system. |
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Method of obtaining acryl and methacryl polymers Invention relates to highly molecular compounds and deals with method of obtaining acryl and methacryl polymers, which are applied in obtaining composite materials, coatings and paint-and-varnish products. Method of obtaining acryl and methacryl polymers is realised by polymerisation of monomer in solution of polar organic solvent, which does not contain mobile halogen atom, in presence of organic initiator, containing mobile halogen atom, organic ligand, which contains 2 or more nitrogen atoms, and catalyst, based on metal of group 11 of Periodic system of elements, with method being characterised by the fact that as metal of group 11 silver is used, applied in form of mirror on internal surface of reaction vessel and/or on external surface of substrate, placed in reaction system. |
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Invention relates to an anionic initiating system, as well as to a method of producing fibre-forming polyacrylonitrile and acrylonitrile copolymers using the initiating system. The initiating system contains carbon, hydrogen, nitrogen and oxygen atoms and consists of a lower olefin oxide and a bicyclic tertiary amine or diamine, wherein at least one tertiary nitrogen atom belongs to both rings and is located at the vertex of the bicyclic structure. The method of producing polyacrylonitrile and acrylonitrile copolymers includes polymerising acrylonitrile or copolymerising acrylonitrile with an oxygen-containing monomer under the effect of said initiating system. The process is carried out in polar aprotic solvents. |
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Compound increasing efficiency of low-temperature deparaffination of oil fractions Polymer additive deparaffination of oil fractions comprises active component and solvent; copolymer of higher alkyl acrylates with linear alkyl groups C16-C20 and N,N-dymethylamino ethyl methacrylate are used as the active component while any fit solvent that ensures solubility of the additive in raw mix (benzene, toluene, oil, etc.) is used as the solvent with the following ratio of components, wt %: copolymer 54-57; solvent - the remaining share. The copolymer has number-average molecular weight of 17000-200000, it contains 90-95 mol % of links of higher alkyl acrylates and 5-10 mol % of links of N,N-dymethylamino ethyl methacrylate. |
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Method of obtaining butylcaoutchouc Process of polymerisation is realised in presence of catalyst - aluminium chloride, and is carried out with application of solvent, which consists of mixture of 2 chlorine-containing hydrocarbons, one of which has dipole moment in the range 1.6-1.9 D, and second - in the range 2.0-2.1 D. Second solvent is taken in molar ratio to catalyst, aluminium chloride, equal 1:1-100. |
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Non-reactionable hydrophilic polymers with terminal siloxanes and fields of application thereof Invention relates to applied in ophthalmology compositions of silicone-hydrogel and non-reactionable hydrophilic polymers. Claimed is a composition for obtaining an ophthalmological solution or a device, containing silicone-hydrogel and a non-reactionable hydrophilic polymer with polydispersity 1.5 or lower, in which the hydrophilic segment, contained in the main chain, is obtained from vinyllactones, hydrophilic (meth)acrylates or (meth)acrylamides, with the polymerisation degree of 300-10000, a linear silicone segment, containing polydialkylsiloxane, contains 6-20 siloxyl units and is at least on one end of the non-reactionable hydrophilic polymer, with the non-reactionable hydrophilic polymer being associated with silicone-hydrogel via a silicone block. Methods of obtaining and processing of contact lenses, the ophthalmological device and ophthalmological solution with the application of the said composition are also claimed. |
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Blocking device and method of blocking Invention relates to polymer powder degassing. It describes the blocking to be used in degassing of polymer powder inside degassing vessel. Measured is temperature of gas phase obtained at separation of fluid and vapour to be used as purging gas in said degassing vessel. Then, said temperature is compared with threshold magnitude. In case measured temperature is higher than threshold magnitude degree of vapour application as purging gas application is terminated or decreased. Besides, said blocking includes fluid level, vapour phase pressure and temperature are measured. Polymer powder degassing is described. |
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Invention relates to use of curable resins containing a glycidyl (meth)acrylate based prepolymer for producing composite materials for use in space, and more specifically to composite materials which are part of structures designed for deployment in space and gaining rigidity after deployment. |
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Present invention relates to production of a copolymer with high chemical homogeneity and use thereof for improving cold flow properties of liquid fuels. Described is a copolymer with high chemical homogeneity, consisting of (A) 50 to 30 wt % ethylene, (B) 50 to 70 wt % hydrocarby ester of acrylic acid or methacrylic acid with 4-24 carbon atoms in the carbon residue, or a mixture of such hydrocarbyl esters, (C) 0 to 5 wt % acrylic acid and/or methacrylic acid and (D) 0 to 10 wt % of one or more copolymerisable monomers, where all monomer components in the copolymer together add up to 100 wt %, obtainable by polymerising a mixture of 80 to 60 wt % ethylene, 20 to 40 wt % acrylic acid and/or methacrylic acid and 0 to 10 wt % of one or more copolymerisable monomers, where all monomer components in the mixture together add up to 100 wt %, in back-mixing, continuous polymerisation equipment, and subsequent polymer-analogous esterification of the resulting copolymer of ethylene and (meth)acrylic acid or of essentially ethylene and (meth)acrylic acid with a hydrocarbon alcohol with 4-24 carbon atoms or a mixture of hydrocarbon alcohols with 4-24 carbon atoms. Also described is a method of producing said copolymer. The invention also describes liquid fuels containing 10 to 500 ppmw of said copolymer. Also described is the use of said copolymer to improve cold flow properties of fuel oils, to reduce the lower mixing temperature of cold flow enhancing additives with fuel oils and to improve filterability of fuel oils containing cold flow enhancing additives. |
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Claimed invention relates to phosphonylamidines and metal-containing complexes on their basis for obtaining catalysts for oligomerisation of olefins, of formulae: and , respectively, where: R1 represents C1-C15 alkyl, C4-C20 cycloalkyl, C4-C20 substituted cycloalkyl, C6-C20 aryl or C6-C20 substituted aryl, R2 represents C1-C15 alkyl, C4-C20 cycloalkyl, C4-C20 substituted cycloalkyl, C6-C20 aryl, C6-C20 substituted aryl, C7-C20 aralkyl or C7-C20 substituted aralkyl, R3 represents hydrogen, and each R4 and R5 independently represents C1-C15 alkyl, C4-C20 cycloalkyl, C4-C20 substituted cycloalkyl, C6-C20 aryl, C6-C20 substituted aryl, where each substituent represents halogenide, C1-C10 alkyl or C1-C10 alkoxygroup, MXP represents metal salt, where M represents chrome, cobalt or nickel, X represents halogen, and p constitutes from 2 to 6, Q represents neutral ligand, where each ligand, independently represents C2-C20 nitrile or C2-C20ether, and a constitutes from 0 to 3. |
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Zinc or copper (ii) salt and use thereof as biocide Chemical compound is a zinc or copper (II) salt of general formula CH2=C(R)COO-M-OCOH, where M is Zn or Cu, R is H or CH3. |
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Polymers for purification from metals and use thereof Described is use of a composition containing a polymer obtained from at least two monomers: acryl-x and alkylamine, where said polymer is modified such that it contains more than 55 mol % dithiocarbamic acid, capable of purifying one or more compositions containing one or more of the described metals. |
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Method of increasing efficiency of controlling butyl rubber production process Invention relates to production of synthetic rubber and can be used to control the process of producing butyl rubber. A method of increasing efficiency of controlling the process of producing butyl rubber, obtained via copolymerisation of isoprene and isobutylene dissolved in an inert solvent in the presence of a catalyst, is carried out in an apparatus which includes a mixer, a reactor, connected to each other by pipes using control loops, consisting of controller-sensors for: flow rate of isoprene, isobutylene, conditionally inert and activated solvent, mixture, catalyst; level and flow rate of coolant in the reactor, sensors for the temperature and concentration of the mixture, temperature in the polymeriser, connected to controllers with adjustment of the flow rate of isoprene, isobutylene, conditionally inert solvent, coolant; the method being characterised by that it includes: continuous sampling of the catalyst and the mixture for a test polymerisation reaction in a small flow-type polymeriser, determining the polymerisatioin reaction temperature in the small flow-type polymeriser and sending the measurement results to the catalyst and mixture preparation process control unit, determining physical-mechanical properties of the finished polymer and sending all measurement results to the catalyst and mixture preparation process control unit, performing data analysis in the control unit and, in accordance with a program, the control unit outputs instructions for changing the ratio of components in the catalyst and the mixture, activating in a cavitator before into the main polymeriser part of the solvent - CH3Cl, used in the catalyst and mixture preparation processes, constantly feeding into the main polymeriser the activated part of the solvent after the cavitator, using a magnetic pulsed apparatus, cyclically applying pulsed mechanical action on pipes of the cooling system and the housing of the polymeriser, which removes the polymer stuck on the outer surface of the pipes and the inner mirror of the polymerisation apparatus in order to maintain a constant heat transfer coefficient of the surface of the pipes of the cooling system and maintain the required temperature of the polymer suspension in the main polymeriser. |
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Polymers functionalised with nitrile compounds containing protected amino group Invention relates to functionalised polymers and method for their manufacture. A method for preparing a functionalised polymer comprises the steps of: polymerising diene monomer, and optionally co-diene monomer, using an anionic initiator to form a reactive polymer and the reactive reaction of the polymer with a compound containing a nitrile protected amino group. The protected amino group is selected from the group, consisting of acyclic fragments, heterocyclic fragments and non-aromatic cyclic fragments. |
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Polymers, functionalised by polyoxime compounds and methods of obtaining thereof Invention relates to polymers, functionalised by polyoxime compounds, and methods of obtaining thereof. The method of obtaining a functionalised polymer includes the following stages: (i) polymerisation of a conjugated diene monomer with obtaining a reactionable polymer; and (ii) interaction between the reactionable polymer and a protected polyoxime compound, where the protected polyoxime compound includes two or more protected oxime groups and where the two or more protected oxime groups are described by formula -CR1=N-O-R2, in which R1 represents a hydrogen atom or a monovalent organic group and R2 represents a monovalent organic group. |
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Systems and methods for measurement of particles accumulation on reactor surfaces Invention relates to a measuring method of particles accumulation on reactor surfaces. A monitoring method of a mixture of particles and fluid medium involves passage of the mixture containing charged particles and fluid medium, thus streamlining a particle accumulation detector, measurement of an electrical signal recorded by the detector while some charged particles pass by the detector without any contact to it, and other charged particles contact to the detector, processing of the measured electrical signal, thus providing output data, and determination as per the output data, whether the charged particles contacting the detector have on average a charge different from the charged particles passing by the detector without any contact to it or not. |
Another patent 2551392.