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Catalytic system and method of producing reactor powder of ultrahigh-molecular-weight polyethylene for ultrahigh-strength ultrahigh-modulus articles via cold forming. RU patent 2459835.

FIELD: chemistry.

SUBSTANCE: invention relates to synthesis of ultrahigh-molecular-weight polyethylene (UHMWPE) with a special morphology and making ultrahigh-strength and high-modulus fibres and belts for making ropes, nets, helmets, body armour and other protective materials therefrom. Described is a catalytic system based on oxyallyl group-functionalised bis-(phenoxy-imine) complexes of titanium chloride with the general structure I-II, to obtain reactor powder of UHMWPE, which can be processed into ultrahigh-modulus ultrahigh-strength fibres and belts via cold forming, having the following structure: , where (I) R¹-^tBu, R²-CH₃O; (II) R¹ - isopropylbenzyl, R²-CH₃. The ethylene polymerisation method is carried out in the presence of said catalytic system. The invention also relates to a method for cold forming the reactor powder of UHMWPE, obtained from polymerisation of ethylene in the presence of a catalytic system having the following structure: , where (I) R¹-^tBu, R²-CH₃O; (II) R¹ - isopropylbenzyl, R²-CH₃; (IV) R¹ - isopropylbenzyl, R²-H.

EFFECT: optimum structure of the obtained UHMWPE; the obtained UHMWPE is suitable for making articles through cold forming.

6 cl, 1 tbl, 19 ex

IPC classes for russian patent Catalytic system and method of producing reactor powder of ultrahigh-molecular-weight polyethylene for ultrahigh-strength ultrahigh-modulus articles via cold forming. RU patent 2459835. (RU 2459835):

C08F4/642 -

C08F110/02 - Ethene

C07F7/28 - Titanium compounds

Another patents in same IPC classes:

Metallocene catalysts and use thereof in polymerisation processes / 2455316
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Preparation of catalyst paste for olefin polymerisation / 2448985
Present invention relates to a method of producing a catalyst composition in form of catalyst particles dispersed in a semi-liquid matrix. Described is a method of producing a catalyst composition for polymerisation of olefins in form of a dispersion of catalyst particles in a semi-liquid matrix, characterised by that said method comprises steps for: forming a suspension of catalyst particles in oil by loading, while stirring continuously, dry catalyst powder into a tank containing said oil, wherein the rate of loading the catalyst powder per metre of the oil boundary surface is less than 800 kg/h*m2; adding, while stirring, molten thickener having melting point ranging from 30 to 70°C, while holding the catalyst suspension in oil at such a temperature that said thickener solidifies upon contact with said suspension, wherein said oil has dynamic viscosity at 100°C ranging from 1 to 12 cP, and said catalyst particles fed into the tank at step a) are Ziegler-Natta catalyst components based on a titanium halide deposited on a magnesium halide. Described also is an olefin polymerisation method, which is realised in the presence of a solid polymerisation catalyst, wherein said solid polymerisation catalyst is treated and transferred into a polymerisation reactor through the following steps for: a) forming a suspension of catalyst particles in oil by loading, while stirring continuously, dry catalyst powder into a tank containing said oil, wherein the rate of loading the catalyst powder per m2 of the oil boundary surface is less than 800 kg/h*m2; b) adding, while stirring, molten thickener having melting point ranging from 30°C to 70°C, while holding the catalyst suspension in oil at such a temperature that said thickener solidifies upon contact with said suspension; c) the catalyst paste from step b) is brought into contact with an organoaluminium compound in the presence of an inert hydrocarbon, possibly an electron-donor compound, at temperature from 5°C to 30°C; d) polymerisation of one or more α-olefins of formula CH2=CHR, where R denotes hydrogen or a hydrocarbon radical having 1-12 carbon atoms, in one or more polymerisation reactors in the presence of the catalyst from step c), wherein said oil has dynamic viscosity at 100°C ranging from 1 to 12 cP, and said catalyst particles which are fed into the tank at step a) are Ziegler-Natta catalyst components based on a titanium halide deposited on a magnesium halide.

Method of the butadiene polymerization catalytic system production and the method of the 1.4-cis-polybutadiene production / 2442653
Invention relates to the method of production of the butadiene polymerization catalytic system; the method describes the production of the butadiene polymerization catalytic system by means on interaction of tris-[bis-(2-ethylhexyl) phosphate] neodymium, butadiene, diisobutylaluminiumhydride, the chlorinating agent in the fluid of the inert solution followed by the formation of the catalytic system whereat the chlorinating agent is represented by the reaction product of aluminum triethyl with ethylaluminiumseqichloride upon the proportion of the powdered components regarding aluminum 1:2 at the temperature 20-50°C; the method describes the production of 1.4-cis-polybutadiene by means of the butadiene polymerization in the hydrocarbonic inert solvent in the presence of the above catalytic system.

Method of producing titanium-magnesium nanocatalyst for (co) / 2425059
Described is a method of producing a titanium-magnesium nanocatalyst through reaction of magnesium with titanium tetrachloride in the presence of n-butyl chloride. Content of butyl chloride is equal to 6.0-8.7 ml per 1 g or magnesium. Volume ratio of titanium tetrachloride to n-butyl chloride is equal to 1:(47-67).

Method of olefin polymerisation / 2392283
Invention claims multistage method involving the following stages: stage a) propylene polymerisation, optionally with one or more monomers selected out of ethylene or alpha-olefins of formula CH2=CHT1, where T1 is C2-C10-alkyl radical, in the presence of catalytic system applied onto silicon dioxide and containing: i) one or more metallocene compounds of formula (I); ii) alumoxane or compound capable of alkylmetallocene cation formation; and optionally iii) organoaluminium compound; stage b) contact with one or more alpha-olefins of CH2=CHT formula in polymerisation conditions in propylene or ethylene gas phase, where T is hydrogen or C1-C10-alkyl radical, and optionally with non-conjugated diene in the presence of polymer obtained at stage a) and optionally in the presence of additional organoaluminium compound, provided that homopolymer formation does not occur; where polymer amount obtained at stage a) lies within 5 to 90 wt % of polymer weight obtained through the whole method, and polymer amount obtained at stage b) lies within 10 to 95 wt % of polymer weight obtained through the whole method.

Low, medium and high density single-catalyst polyethylenes / 2388766
Present invention relates to synthesis of medium and high density polyethylenes with a single catalyst composition. A method of polymerising ethylene and α-olefin is described, which involves mixing ethylene at partial pressure at least equal to 1300 kPa and optionally one or more α-olefins with a catalyst composition in a continuous polymerisation reactor at pressure blow 10000 kPa, in which the catalyst composition contains hafnocene; and extraction of polyethylene having density ranging from 0.930 to 0.975 g/cm3, and characterised by that when molar ratio of α-olefin to ethylene in the reactor ranges from 0 to 0.20, catalyst efficiency does not change by more than 30%. Also described is a method of converting the poly(ethylene/α-olefin) product in one reactor to a second poly(ethylene/α-olefin) product involving: (a) operation of the reactor at pressure below 10000 kPa with a first molar ratio hydrogen:ethylene and a first molar ratio comonomer: ethylene; (b) extraction of the first poly(ethylene/α-olefin) product; (c) varying one or both the first molar ratio of hydrogen to ethylene and the first molar ratio of comonomer to ethylene to obtain a second molar ratio of hydrogen to ethylene and a second molar ratio of comonomer to ethylene; and (d) extraction of the second poly(ethylene/α-olefin) product, in which the conversion is possible using the same catalyst composition, and in which density of the first poly(ethylene/α-olefin) product is less than or equal to 0.920 g/cm3 and density of the second poly(ethylene/α-olefin) product is greater than or equal to 0.935 g/cm3, or in which conversion is possible using the same catalyst composition which contains hafnocene, and in which I2 of the first poly(ethylene/α-olefin) product is less than or equal to 8, measured according to ASTM D-1238E 190°C/2.16 kg and I2 of the second poly(ethylene/α-olefin) product is more than or equal to 12, measured according to ASTM D-1238E 190°C/2.16 kg and characterised by that, when molar ratio of α-olefin to ethylene in the reactor ranges from 0 to 20, catalyst efficiency does not change by more than 30%.

Dual metallocene catalyst for producing film resins with good machine direction (md) elmendorf tear strength / 2382793
Invention relates to a catalyst composition for catalysis of (co)polymerisation of olefins, containing a first metallocene compound, a second metallocene compound, at least one chemically treated solid oxide and at least one organoaluminium compound, where a) the first metallocene compound has the following formula: (X1)(X2)(X3)(X4)Zr, where (X1) and (X2) independently represent monosubstituted cyclopentadienyl, monosubstituted indenyl, monosubstituted fluorenyl or their monosubstituted, partially saturated analogues; where each substitute on (X1) and (X2) independently represents a straight or branched aliphatic group, where the aliphatic group is unsubstituted or substituted, where any of them has 1-20 carbon atoms; where (X3), (X4) and any substitute on the substituted aliphatic group on (X1) and (X2) independently represent an aliphatic group, an aromatic group, a cyclic group, a combination of aliphatic and cyclic groups, an oxygen group, a sulphur group, a nitrogen group, a phosphorus group, an arsenic group, a carbon group, a silicon group, a germanium group, a tin group, a lead group, a boron group, an aluminium group, an inorganic group, an organometallic group or their substituted derivative, where each of them has 1-20 carbon atoms; halogenide; or hydrogen; b) the second metallocene compound has the following formula: (X5)(X6)(X7)(X8)M, where 1) M represents Zr; (X5) and (X6) independently represent substituted cyclopentadienyl, substituted indenyl, substituted fluorenyl or their substituted, partially saturated analogue; where at least one of (X5) and (X6) is at least disubstituted, and each substitute on (X5) and (X6) independently represents a straight or branched aliphatic group, where the aliphatic group is unsubtituted or substituted, where any of them has 1-20 carbon atoms; 2) M represents Zr; (X5) and (X6) independently represent cyclopentadienyl, indenyl, fluorenyl, their partially saturated analogue or their substituted analogue; and (X5) and (X6) are linked by a substituted or unsubstituted bridge group which has 3-5 adjacent ansa carbon atoms in the chain, one end of which is bonded to (X5) and the other to (X6); or 3) M represents Hf; (X5) and (X6) independently represent monosubstituted cyclopentadienyl, monosubstituted indenyl, monosubstituted fluorenyl or their monosubstituted, partially saturated analogue; and each substituted on (X5) and (X6) independently represents a straight or branched aliphatic group, where the aliphatic group is unsubstituted or substituted, where any of them has 1-20 carbon atoms; and where (X7), (X8), any substitute on (X5), any substitute on (X6), any substitute on the substituted aliphatic group on (X5) and (X6) and any substitute on the substituted bridge group which links (X5) and (X6) independently represent an aliphatic group, an aromatic group, a cyclic group, a combination of aliphatic and cyclic groups, an oxygen group, a sulphur group, a nitrogen group, a phosphorus group, an arsenic group, a carbon group, a silicon group, a germanium group, a tin group, a lead group, a boron group, an aluminium group, an inorganic group, an organometallic group or their substituted derivatives, where any of them has 1-20 carbon atoms; halogenide; or hydrogen; and c) the chemically treated solid oxide contains a solid oxide treated with an electron-acceptor anion, and d) the organialuminium compound has the following formula: Al(X9)n(X10)3-n, where (X9) represents hydrocarbyl with 1-20 carbon atoms; (X10) represents alkoxide or aryloxide with 1-20 carbon atoms, halogenide or hydride; and n equals a number from 1 to 3 inclusive. The invention also relates to methods of preparing a catalytic composition, a polymer or copolymer of ethylene obtained in the presence of the catalytic composition and use of the catalytic composition in polymerisation of olefins.

Catalyst compositions and polyolefins for use in coatings, deposited using expedition method / 2374272
Invention relates to organometallic compositions, catalyst compositions for polymerisation of olefins, methods of polymerisation and copolymerisation of olefins using a catalyst composition and polyolefins. Described is a catalyst composition for polymerisation of olefins, which contains a product for bringing into contact the first metallocene compound, second metallocene compound, at least one chemically modified solid oxide and at least one organoaluminium compound; a mixture of linked substances; method of producing catalyst composition; method of polymerisation of olefins, involving bringing into contact at least one type of olefin monomer and a catalyst composition under polymerisation conditions; ethylene polymer, obtained using the previous method; product which contains the polymer in the previous paragraph; product which contains the polymer in the above mentioned paragraph, where the product is a container, dish, film-type product, cylindrical reservoir, fuel tank, pipe, geomembrane or insert; use of the catalyst composition in any of the above mentioned paragraphs in an olefin polymerisation reaction; use of a mixture of linked substances on the above mentioned paragraph in an olefin polymerisation reaction; polymer obtained using the method given above.

Method of obtaining catalyst for polymerisation of higher α-olefins and method of obtaining ultra-high molecular poly-α-olefins / 2368624
Description is given of a method of obtaining a catalyst for polymerisation of α-olefins, involving reacting titanium chloride, diethylaluminium chloride and di-n-butyl ether, distinguished by that, the titanium chloride used is titanium tetrachloride, which is reacted with di-n-butyl ether in an inert hydrocarbon solvent, obtaining product I, and diethylaluminium chloride is reacted with di-n-butyl ether, obtaining product II. Product II is then added to product I and the obtained suspension is held at 90-100°C. Described also is a method of obtaining ultra-high molecular poly-α-olefins through polymerisation of α-olefins CnH2n, where n=6-10, or their mixture, in the presence of the above described catalyst and dialkylaluminium chloride as a cocatalyst. The process is carried out in a monomer medium in static conditions.

Enhanced cocatalyst for production of linear alpha olefins / 2368419
Described is a homogeneous catalyst for production of linear alpha olefins through oligomerisation of ethylene, consisting of a zicornium salt of organic acids and a cocatalyst. The cocatalyst is a mixture of alkyl aluminium compounds, chosen from the group Al(C2H5)3, AlCl(C2H5)2, Al2Cl3(C2H5)3 and AlCl2(C2H5), and aluminium chloride. Molar ratio of chlorine to aluminium in the cocatalyst can be varied from 1.0 to 1.3.

Components of catalyst for polymerisation of olefins and catalysts made from said components / 2444532
Invention describes catalyst components containing Ti, Mg, Cl and an optional OR1 group, in which R1 denotes a C1-C20 hydrocarbon group in such an amount that molar ratio OR1/Ti is less than 0.5, characterised by the following properties: BET specific surface area less than 80 m2/g; total porosity (Pt) measured using a mercury method in the range of 0.70-1.50 cm3/g; the difference (Pt-Pf) is greater than 0.1, where PT denotes total porosity and PF denotes porosity due to pores with radius less than or equal to 1 mcm; the amount of Ti in the catalyst component is less than 10 wt %, based on total weight of the catalyst component. Described is a method of producing said components, involving a first step (a) where a compound MgCl2.m(RIIIOH)tH2O, in which 0.3≤m≤1.7, t ranges from 0.01 to 0.6 and RIII denotes an alkyl, cycloalkyl or aryl radical, having 1-12 carbon atoms, reacts with a titanium compound of formula Ti(ORII)nXy-n, in which n lies between 0 and 0.5, y is titanium valence, X denotes a halogen and RIV denotes an alkyl radical having 1-8 carbon atoms; and a second step (b) in which a solid product obtained from step (a) undergoes thermal treatment at temperature higher than 100°C. Described also is a method for (co)polymerisation of ethylene in the presence of a catalyst system containing a product of reaction of solid catalyst components described above and an aluminium alkyl compound.

Method of producing catalytic system for polymerisation of olefins / 2424055
Invention relates to production of catalytic system for polymerisation of olefins. Catalytic system s produced using catalytic system components activated via contact with aluminium organic compounds. Prior to said contact, aluminium organic compounds are subjected to microwave radiation with frequency of 0.3 to 20 GGz for 0.5-20 minutes.

Method of obtaining (co) / 2405001
Monomer used is a vinyl monomer selected from a group consisting of vinyl-substituted aromatic, heterocyclic and alicyclic compounds, unsaturated aliphatic carboxylic acids and their derivatives, unsaturated aliphatic nitriles, vinly esters of aromatic and saturated aliphatic carboxylic acids, divinyl compound or mixtures thereof. The method involves a) separate supply of at least one stream of monomer of at least one stream of carbon dioxide, a stream of initiator and, optionally, a stream of a modifying additive, wherein said streams of monomer and/or carbon dioxide are fed at supercritical pressure; b) heating said monomer and carbon dioxide streams at least to supercritical temperature of the monomer and/or carbon dioxide to form a supercritical fluid; c) merging said monomer, carbon dioxide and initiator streams and, optionally, modifying additive in a jet mixer (6) of a pipe reactor with linear velocity which ensures pressure lower than supercritical pressure of the monomer and/or carbon dioxide, during which at least partial transition of the supercritical fluid into gas phase takes place, wherein the period of time during which said merging takes place is essentially less than 1 second, preferably less than 0.1 second; d) sharp reduction of linear velocity of the obtained reaction mixture in a direct flow pipe reactor (7) to a value which ensures pressure higher than supercritical pressure of the monomer and/or carbon dioxide, during which at least partial transition of the gas phase to supercritical fluid takes place and said reaction mixture reacts in essentially adiabatic conditions to form polymer particles, in the initial period of which instantaneous increase in temperature of the said reaction mixture by at least approximately 20°C takes place. The period of time during which said interaction takes place is essentially approximately between 60 and 120 seconds; e) throttling the obtained stream of polymer solution through a reducing device (8) into an evaporative separator (9) with lower pressure, in which owing to sharp reduction of density of the said polymer solution, the supercritical fluid turns into a solid phase with subsequent formation of polymer particles, wherein the reducing device (8) simultaneously maintains the required supercritical pressure of the monomer and/or carbon dioxide in the reaction zone of the pipe reactor (7), after which a gas stream primarily containing carbon dioxide comes out from the top of the evaporative separator (9) and a powdered stream primarily containing fine granules of polymer is obtained at the lower part. The invention also discloses a device for producing copolymers.

Polyethylene and catalyst composition for polyethylene synthesis / 2387681
Polyethylene in form of ethylene homopolymers and copolymers of ethylene with α-olefins and having molecular weight distribution range Mw/Mn from 6 to 100, density from 0.89 to 0.97 g/cm3, weight-average molecular weight Mw from 5000 g/mol to 700000 g/mol and from 0.01 to 20 branches/1000 carbon atoms and at least 0.5 vinyl groups/1000 carbon atoms, where the fraction of polyethylene with molecular weight less than 10000 g/mol has degree of branching from 0 to 1.5 branches on the side chains, longer than CH3/1000 carbon atoms. The catalyst composition for synthesis of polyethylene in paragraph 1 consists of at least two different polymerisation catalysts, from which A) is at least one polymerisation catalyst based on monocyclopentadienyl complex of a group IV-VI metal, in which the cyclopentadienyl system is substituted by an uncharged donor (A1) of formula Cp-Zk-A-MA (II), where variables assume the following values: Cp-Zk-A is , MA is a metal which is selected from a group consisting of titanium (III), vanadium, chromium, molybdenum and tungsten, and k equals 0 or 1, or with hafnocene (A2), and B) is at least one polymerisation catalyst based on a ferrous component with a tridentate ligand containing at least two ortho-, ortho-disubstituted aryl radicals (B).

Catalyst component for ethylene polymerisation, production thereof and catalyst containing this component / 2375378
There is described catalyst component for ethylene polymerisation, containing reaction product of magnesium complex at least one titanium compound, at least one alcoholic compound, at least one silicon compound and optionally organoaluminium compound, wherein magnesium complex represents a product of magnesium halogenide in a solvent system containing organic epoxide and organophosphorous compound; alcoholic compound represents linear or branched alkyl or cycloalkyl alcohol containing 1 to 10 carbon atoms, or aryl or aralkyl alcohol having 6 to 20 carbon atoms, and alcoholic compound is optionally substituted with one or more halogen atoms; titanium compound has general formula Ti(OR)aXb wherein R means C1-C14 aliphatic or aromatic hydrocarbyl, X is halogen, and means 0, 1 or 2, b is an integer 1 to 4, and a+b=3 or 4; silicon compound is organic silicon compound of general formula R1 xR2 ySi(OR3)z wherein R1 and R2 independently represent hydrocarbyl or halogen atom, R3 means hydrocarbyl, 0 ≤ x ≤ 2, 0 ≤ y ≤ 2, 0 ≤ z ≤ 4 and x+y+z=4; organoaluminium compound has general formula AlR4 nX1 3-n wherein R4 means hydrogen or hydrocarbyl containing 1 to 20 carbon atoms, X1 is halogen atom and n has a value satisfying the inequality 1 <n≤3. There is also described method for making the catalyst component for ethylene polymerisation therewith including the stages as follows: (1) magnesium halogenide dissolution in the solvent system containing organic epoxide and organic organophosphorous compound. The solvent system optionally, however preferentially in addition contains an inert thinner to form a homogeneous solution; (2) addition of alcoholic compounds prior to, after or during formation of homogeneous solution containing magnesium halogenide; (3) contacting the solution received at the stage (2) with titanium compound, with silicon compound added prior to, after or during contacting process to form a mixture; (4) slow heating of the mixture to temperature 60°C to 110°C and holding at this temperature for some time with a solid substance gradually deposited in heating; and (5) recovery of the solid substance formed at the stage (4) to produce the catalyst component, where: alcoholic compound represents linear or branched alkyl or cycloalkyl alcohol with 1 to 10 carbon atoms, or aryl or agalkyl alcohol with 6-20 carbon atoms, with alcoholic compound being optionally substituted with halogen atom (atoms); titanium compound has general formula Ti(OR)aXb wherein R represents C1-C14aliphatic or aromatic hydrocarbyl, X means halogen atom, and is equal to 0, 1 or 2, b represents an integer 1 to 4, and a+b=3 or 4; and silicon compound represents organic silicon compound of general formula R1 XR2 ySi(OR3)z wherein R1 and R2 independently represent hydrocarbyl or halogen atom, R3 means hydrocarbyl, 0 ≤ x ≤ 2, 0 ≤ y ≤ 2, 0 ≤ z ≤ 4, and x+y+z=4. There is also described a catalyst for ethylene polymerisation which contains a reaction product of: (1) the catalyst component described above; and (2) organoaluminium cocatalyst of formula AlR5 nX2 3-n wherein R5 represents hydrogen or hydrocarbyl, with 1 to 20 carbon atoms, X stands for halogen atom, and n corresponds to the inequality 1<n≤3. There is also described method of ethylene polymerisation including the stages as follows: (i) contacting of ethylene and optionally comonomer (comonomers) with the catalyst described above in polymerisation environment to make polymer; and (ii) recovery of polymer prepared at the stage (i).

Highly active ziegler-natta catalyst for polymerisation of ethylene with good sensitivity towards hydrogen / 2373227
Description is given of a catalyst system for polymerisation of ethylene, which contains: a solid component of titanium catalyst with diametre of approximately 5 to 60 microns (per 50% volume), wherein the solid component of titanium catalyst contains a titanium compound and a carrier, made from a compound of magnesium, alkylsilicate and monoester; and an organoaluminium compound with at least one aluminium-carbon bond. Also described is a solid component of titanium catalyst for producing polyethylene, which contains: a titanium compound; a carrier made from a compound of magnesium, alkylsilicate and monoester, a solid component of titanium catalyst with diametre of approximately 5 to 60 microns (per 50% volume). A method is also described for making a catalyst carrier for the said catalyst system, as well as a method of producing polyethylene, which involves polymerisation of ethylene in the presence of hydrogen and the catalyst system described above.

Radiation-protection composite material and method of its production / 2368629
Invention may be used to make protection elements in various equipment used for flaw detection, for medical purposes, for radioactive logging of oil and gas wells, in portable neutron generators, etc. Method includes polymerisation of ethylene on surface of elementary boron particles with average size of 3-8 mcm in presence of catalytic system immobilised on them, which consists of vanadium tetrachloride and aluminium-organic compound. First ethylene is pre-polymerised on surface of boron particles at 25-30° C and ethylene pressure of 1 at for 8-10 minutes, then temperature is increased up to 50-60°C, and ethylene polymerisation is continued at 50-60°C and pressure in the range from 1 to 10 at to produce layer of ultrahigh molecular polyethylene on them with molecular weight of at least 1·106 and thickness of 0.01-20 mcm. Radiation-protection composite material represents particles of elementary boron with polyolefin layer in the form of agglomerates of average size of 20-100 mcm.

Catalyst based on bridge bis(phenoximine) complex, method of its preparation and process of ethylene polymerisation applying it / 2364607
Invention relates to field of chemical industry, in particular, to creation of highly active homogenous catalysts. Described is catalyst based on binary bridge bis(phenoximine) complex of titanium, in which as bridge between phenyl substituents of imine nitrogen it contains n - phenylene group, and corresponds to the following formula: . Described is method of preparing described above catalyst by interaction of tetradentate diimine ligand with compound of transitive metal, in which as components for ligand preparation used is 4,4"-diamino-l-terphenyl and 3,5-dicumylsalicilic aldehyde, and as compound of transitive metal used is titanium diisopropoxydichloride TiCl2(OPr)2. Described is process of ethylene polymerisation in medium of hydrocarbon solvent in presence of catalyst obtained by claimed method with co-catalyst.

Highly-strong polyethylene compositions of low dullness / 2360936
Invention relates to polyethylene mixed compositions, intended for film manufacturing, which include two or more different ethylene polymers, each of which has different degree of complexity of long chain branching. Polyethylene composition is practically linear and has average index of branching constituting 0.85 or less. In addition, composition has density 0.935 g/cm3 or less, dullness - 10% or less and stability to falling load impact - 100g/mm or more, determined according to ASTM D-1709 methodology.

Method of obtaining linear alfa-olefin oligomer using heat-exchanger / 2339604
Method of obtaining linear alfa-olefin oligomers in reactor, which contains liquid and gas phases, which are in equilibrium through surface of separation of gas/liquid phases, includes stages of catalytic oligomerisation of ethylene in presence of complex of nickel, palladium, cobalt, titanium, zirconium, hafnium, vanadium, chrome, molybdenum or tungsten into oligomer of alfa-olefin with average molecular weight from 50 to 350 with release of heat, and removal of heat in hear-exchanger, which is not in direct contact with liquid phase, using at least part of gas phase as cooling medium.

Silicon-titanium-containing polyol derivatives and hydrogels based thereon / 2458929
Invention relates to novel biologically active chemical compounds - silicon-titanium-containing polyol derivatives (glycerine, polyethylene glycol), as well as hydrogels based thereon. Disclosed are silicon-titanium-containing polyol derivatives, having transcutaneous, wound healing and regenerating activity, the composition of which in excess of polyol has the formula k(CH3)4-nSi(O-R-OH)n·Ti(O-R-OH)4·xHO-R-OH, where R=R1=CH2-CH(OH)-CH2: k=1 or 2, n=2 or 3, x=11 or 12; or R=R2=(CH2-CH2-O-)7,7CH2-CH2: k=1 or 2, n=2-4, x=2 or 3, with dynamic viscosity 1.5-90.0 Pa·s (25±0.5°C), obtained by reacting (methyl)ethoxysilane and tetrabutoxytitanium with polyol in molar ratio (1-2):1:(18-22) for R1 or (1-2):1:(8-15) for R2, respectively, while heating the reaction mass to temperature 90-140°C and holding at that temperature for not less than 6 hours with intense stirring, followed by removal of the formed alcohols. The invention also discloses hydrogels based on said polyol derivatives, containing water and a gelling additive, with the following ratio of components (wt %): silicon-titanium-containing polyol derivatives in excess of polyol - 70.730-94.970; gelling additive 0.002-0.060; water - the balance.