Ethene (C08F10/02)

ethod for controlling polymerization of olefins with use of two-component catalyst // 2642434
FIELD: chemistry.SUBSTANCE: method includes bringing the two-component catalyst system in contact with an olefin monomer and optionally an olefin co-monomer in the reactor or system of the polymerization reactors in terms of polymerization with obtaining an olefin polymer. The olefin polymer contains a higher molecular weight component and a lower molecular weight component. The two-component catalyst system comprises the first metallocene catalyst component and the second metallocene catalyst component. The reaction temperature is 60-110°C and the interaction time is from 10 min to 2 h. Controlling the weight relationship of a higher molecular weight component to a lower molecular component is achieved through the regulation of the reaction temperature, where the weight ratio of a higher molecular weight component to a lower molecular component increases with the increase of the reaction temperature.EFFECT: obtaining a specific grade of olefin polymer with specific polymer properties.12 cl, 2 dwg, 2 tbl, 8 ex

ethod of producing catalytic compositions and polymeric products produced with using these catalytic compositions // 2640048
FIELD: chemistry.SUBSTANCE: method consists of: combining one or more carriers with one or more magnesium-containing compounds under the reaction conditions to produce the first reacted product; a compound of one or more chlorinating compounds selected from the group consisting of one or more chlorinated silanes including dimethyldichlorosilane, chlorotrimethylsilane, methyltrichlorosilane, diethyl dichlorosilane, tert-butyldimethylsilyl chloride, n-butyltrichlorosilane, or any combination thereof with the first reacted product under the reaction conditions to produce the second reacted product and the compounds of one or more titanium-containing compounds selected from the group consisting of one or more titanium alkoxides, one or more titanium halides and combinations thereof with the second reacted product under the reaction conditions to produce a catalyst. Moreover, the catalyst essentially does not contain donor compounds. A method of producing polyethylene and polyethylene are also provided.EFFECT: invention makes it possible to produce polyethylene having a significantly increased molecular weight distribution.17 cl, 5 dwg, 12 tbl
ethod of polymerization in presence of antistatic action // 2638529
FIELD: chemistry.SUBSTANCE: invention relates to the method of producing polyolefins by polymerization of olefins at a temperature of 20-200°C and a pressure of 0.1-20 MPa, in the presence of a polymerization catalyst and an antistatic composition in a polymerization reactor. The antistatic composition is a mixture containing an oil-soluble surfactant, water and one or more aliphatic hydrocarbons. A mixture of an oil-soluble surfactant, water and one or more aliphatic hydrocarbons is produced. The mixture contains, wt %: 10.0 to 69.9 of an oil-soluble surfactant, 0.1 to 2.0% of water, 30.0 to 89.9% of aliphatic hydrocarbon. The mixture is then fed to the polymerization reactor as such or in a diluted form. Also, the use of an antistatic agent composition as an antistatic agent is described.EFFECT: simplification of the production method, improvement of the product properties, improvement of activity, ensuring good processability of the method with respect to the formation of fine particles.13 cl, 1 tbl, 5 ex

ethod of producing modified metallocene catalyst, produced catalyst and its application // 2637316
FIELD: chemistry.SUBSTANCE: system comprises, as elements or components: (A) at least, one metallocene precursor compound of the catalyst, which is, at least, one transition metal compound represented by the formula Cp*qZLxmLynL3p (I), where the radicals are as defined in the claims, q is an integer of 1 or 2, and is a number of Cp* groups bonded to Z, m is an integer of 0 or 1 and is a number of Lx groups bonded to Z, n is an integer of 0 to 3, p is an integer of 1 to 3, the sum of (q+m+p) is equal to the formal oxidation state Z, provided that when any of the groups Lx, Ly and L3 contains hydrocarbyl, the said L group does not mean Cp*, or a polymerisationally active metallocene compound; (B) at least, one titanium-containing metallocene compound; and (A) is a metallocene compound of a catalyst precursor, (C) at least, one compound selected from the group consisting of: (c1) an ionizing ionic compound and (c2) an organoaluminum compound. Moreover, the titanium-containing metallocene compound is inactive with respect to the polymerization of olefins, or when the titanium-containing metallocene compound initially has an activity or is capable of being activated with respect to the polymerization of olefins and thus includes titanium with a degree of oxidation of Ti+4, titanium in this compound is reduced to the oxidation state of Ti+3, so that the titanium-containing metallocene compound becomes inactive before or simultaneously with the use of a catalyst system for the polymerization of olefins. A method of producing a catalyst system and a method of homopolymerizing an olefin or copolymerizing an olefin are also provided.EFFECT: catalytic system allows to produce polyolefins having the desired combination of properties, including melt index and molecular weight distribution.24 cl, 8 tbl, 6 dwg, 64 ex
ethod for separating components of reaction mixture obtained by polymerization of ethylene-unsaturated monomers under high pressure // 2636520
FIELD: technological processes.SUBSTANCE: method includes feeding the reaction mixture to the separator, separating the reaction mixture into a gas fraction and a liquid fraction, extracting the gas fraction from the top of the separator, and extracting the liquid fraction from the bottom of the separator. Separating is carried out at a pressure of 15-50 MPa and a temperature of 120-300 °C. The separator is a vertical cylinder with a length-to-diameter ratio L/D equal to 4-10, and is equipped with an inlet pipeline for feeding the reaction mixture. The inlet pipeline passes into the separator from above and vertically. The ratio of the inner diameter of the inlet pipeline at its lower end and the inner diameter of the separator in its cylindrical part is 0.2-0.4. A method for obtaining ethylene homopolymers or copolymers from ethylene-unsaturated monomers in the presence of polymerization catalysts with free radicals at temperatures of 100-350 °C and a pressure of 110-500 MPa in the polymerization reactor.EFFECT: high separation efficiency with low entrainment of the polymeric material, low fouling degree of the separator walls, manufacturability due to ensuring a relatively flat surface of the liquid fraction in the separator.10 cl, 2 dwg
Catalyst systems and methods for use thereof to produce polyolefin products // 2634720
FIELD: chemistry.SUBSTANCE: process for polymerization of olefins in the presence of a catalytic system is described. The catalytic system includes a metallocene catalytically active compound, a carrier comprising fluorinated alumina, and an aluminoxane. Aluminoxane content ranges from 0.1 mmol to 7 mmol per gram of the carrier.EFFECT: high productivity and the possibility of application of a small amount of activator.23 cl, 8 tbl, 29 ex
New cyclopenta[b]fluorenyl coompound of transition metal, catalytic composition containing it, and method for production ethylene homopolymer or ethylene and alpha-olefin copolymer at its use // 2632895
FIELD: chemistry.SUBSTANCE: invention relates to a new transition metal compound based on a cyclopenta[b]fluorenyl group, to a transition metal catalyst composition containing it and having high catalytic activity for production of an ethylene homopolymer or an ethylene and one α-olefin copolymer, to a method for production of an ethylene homopolymer or an ethylene and α-olefin copolymer with its use and to the resulting ethylene homopolymer or an ethylene and α-olefin copolymer. The transition metal compound is represented by chemical formula 1, where the radicals value is indicated in the claims. A catalyst composition for production of an ethylene homopolymer or an ethylene and α-olefin copolimer contains a transition metal compound of chemical formula 1 and a cocatalyst selected from an aluminium compound, a boron compound and a mixture thereof. Also chemical compounds represented by chemical formulas 12 and 13 are claimed. The catalyst composition has excellent chemical activity of copolymerization with other olefins, while maintaining high catalytic activity even at high temperature, due to its excellent thermal stability, which allows to produce high molecular weight polymers in high yield. [Chemical Formula 1] ; [Chemical Formula 12] ; [Chemical Formula 13] .EFFECT: claimed compounds can be easily obtained in a high yield.16 cl, 2 tbl, 15 ex

Increasing continuity additive for olefines polymerisation processes // 2632878
FIELD: oil and gas industry.SUBSTANCE: method contains the olefin polymerisation, producing the olefin-based polymer in the polymerisation reactor and light stabiliser, based on the hindered amine adding into the polymerisation reactor. The polymerisation reactor includes the carryover zone and the catalyst supply system for supplying the catalyst system. The method also includes monitoring of the electrostatic activity level in the carryover zone and controlling the light stabiliser amount, based on the hindered amine, added into the polymerisation reactor, based on the electrostatic activity level in the carryover zone.EFFECT: control of the static charge level in the reactor, preventing, reducing the plate formation or its dissolution, reducing the plates formation or its dissolution, preventing the polymer flashes and discontinuity formation, resulting in the static charges excessive levels.18 cl, 1 dwg, 5 tbl, 14 ex

Film composition // 2631651
FIELD: chemistry.SUBSTANCE: composition of polyethylene has a density equal to 948-956 kg/m3, a melt index at an increased shear stress, HLMI, equal to 7-15, a dynamic module of melt elasticity G' at a dynamic frequency, at which the loss module G"=3000 Pa, G'(G"=3000) is 1400-1800 Pa, and the value of Mz/G'(G"=3000) is not less than 900 Da/Pa, where Mz is the z- average molecular weight. In addition, this film has an interaction between the tensile strength in the transverse direction of the film of 15 mcm thick (TTD expressed in units of g/25 mcm) and the impact resistance, when the pointed load falls on a 15 mcm film (I expressed in grams) having a film view TTD>62000/l.EFFECT: films have an improved balance of mechanical characteristics, in particular tensile strength and impact resistance, in combination with excellent extrudability, melt strength, strength characteristics and barrier characteristics.13 cl, 2 dwg, 3 tbl
Bimodal polyethylene resins of high density and composition with improved properties, and ways of their production and application // 2629120
FIELD: chemistry.SUBSTANCE: composition contains a base resin with a density of 945 to 955 kg/m3, in the composition of which is in the amount of 45 to 55 wt % ethylene homopolymer (A) having a density of 945 to 955 kg/m3, and a copolymer of ethylene and C4-C8-alpha-olefin (B) having a density below the density of polymer A. In addition, the composition has a complex viscosity at a shear rate of 0.01 rad/s in the range of 220 to 450 kPa·s, a complex viscosity at a shear rate of 100 rad/s In the range from 2000 to about 2500 Pa·s and the value of the elastic modulus of the melt G'(G"=3000) at the nominal value (G") of the melt viscosity module G"=3000 Pa in the range from 1600 to about 2500 Pa. The method of preparing a bimodal polyethylene composition involves further processing in an extruder using decomposable thermal initiators such as peroxides.EFFECT: increasing the density of the resin.21 cl, 4 tbl

Ethylene removal by absorption // 2623433
FIELD: chemistry.SUBSTANCE: method comprises: light gas stream separation from the polymerization product stream, at that, the said light gas stream comprises unreacted ethylene; light gas stream contacting with the absorbing solvent system, this contacting light gas stream with the absorbent solvent system is performed at a temperature in the range of 4°C (40°F) to 43°C (110°F). At least a part of the unreacted ethylene from the light gas stream is absorbed by the absorbent solvent system; and unreacted ethylene is recovered from the absorbent solvent system to obtain the recovered ethylene. The absorbent solvent system comprises copper chloride, aniline and N-methylpyrrolidone. The invention also relates to a process for preparation of polyethylene and three versions of the polyethylene production system.EFFECT: invention enables high efficiency of ethylene separation from the recycling stream.34 cl, 10 dwg, 3 tbl, 41 ex

Polyethylene composition with high mechanical properties // 2621045
FIELD: chemistry.SUBSTANCE: composition has a density of 0.945 to 0.955 g/cm3, MIF/MIP ratio of 30 to 45, crystallization index at SIC shift of 1.0 to 2.5 and a long chain branching index equal to or greater than 0.85. Moreover, the composition include an ethylene (co)polymer (A) with a density less than 0.960 g/cm3 and MIE melt flow index of 50-200 g/10 min and an ethylene copolymer (B) with lower MIE values, compared to the MIE value of (A), preferably below 0.5 g/10 min. At that, content of comonomer, which is selected from olefins having the formula CH2=CHR, where R is an alkyl radical, linear or branched, containing from 1 to 10 carbon atoms, is from 1 to 3 wt % relative to the total weight of the composition.EFFECT: composition has a good balance of physical and mechanical properties and improved resistance to cracking under environmental stress and toughness.7 cl, 1 dwg, 1 tbl, 5 ex
ethod of obtaining ethylene polymers // 2619926
FIELD: chemistry.SUBSTANCE: process of producing ethylene polymers involves the polymerization of ethylene, additionally with one or more comonomers α-olefins CH2= CHR in the presence of (i) a solid catalyst component comprising titanium, magnesium, halogen and further an internal electron-donor compound, (ii) an aluminium alkyl compound, and (iii) an antistatic compound derived from hydroxyesters having at least two free hydroxyl groups, obtained from carboxylic acids with 8-22 carbon atoms and from polyalcohols. The weight ratio Al-alkyl compound to the solid component of catalyst is more than 0.80 and less than 15 units. The weight ratio of antistatic compound to the alkylaluminium compound is more than 0.10 units.EFFECT: reduction in the formation of polymer buildup on the equipment polymer installation while achieving good operating path, improving polymer morphology.7 cl, 1 tbl, 4 ex
Preliminary polymerized components of the catalyst for polymerization of olefines // 2619109
FIELD: chemistry.SUBSTANCE: described preliminary prepolymerized component for the polymerization of olefins. Mentioned catalyst component comprises a non-stereospecific solid catalyst component, which comprises Ti, Mg and halogen, as well as some amount of the (co) polymer of alpha-olefin CH2= CHR1, where R1 represents a hydrocarbon group of C1-C12 in the range from 0.1 to 500 g per gram of mentioned solid catalyst component. Mentioned (co) polymer has isotacticity, expressed in terms of isotactic pentads, amounting to more than 60 molar %, and the intrinsic viscosity measured in tetralin at 135°C with the volume of at least 1.0 dl/g. The catalyst system for olefin polymerization is also described, as well as the method of (co) polymerization of ethylene and method for preparation of preliminary polymerized catalyst component.EFFECT: use of the prepolymerized catalyst in the polymerization of ethylene with high yield of product and regular morphology.14 cl, 7 tbl, 4 ex

ethods for production of polyethylene and compositions thereof // 2612250
FIELD: chemistry; manufacturing technology.SUBSTANCE: invention relates to compositions for production of polyethylene for moulding by extrusion, casting and blowing hollow articles and to a method for production thereof. Composition contains first polyethylene and second polyethylene, produced in any order in presence of a Ziegler-Natta catalyst in series-connected gas-phase reactors. At least one of first or second gas-phase reactors comprises first and second polymerisation zones, in which hydrogen pressure in first and second polymerisation zones differs so at least part of ethylene from second cycle, through first and second polymerisation zones, and gas mixture from each polymerisation zone partially or completely does not enter another zone. First polyethylene and/or second polyethylene additionally contains one or more comonomers in amount of 0.05–1.2 wt% with respect to total weight of composition and selected from olefins with formula CH2=CHR, where R is an alkyl or substituted alkyl containing 1 to 12 carbon atoms.EFFECT: obtained polyethylene compositions have such balanced properties as manufacturability, high degree of swelling of extruded melt with high surface quality, stability of dimensions, possibility of moulding from melt at high values of shear rate, as well as environmental stress cracking resistance (ESCR).15 cl, 1 dwg, 3 tbl, 2 ex

ethod of degassing and imparting intermediate properties to polyolefin particles obtained during polymerisation of olefins // 2610541
FIELD: chemistry.SUBSTANCE: invention relates to a method of degassing and imparting intermediate properties to polyolefin particles obtained during polymerisation of olefins. Method for production of olefin polymers involves formation of polyolefin particles by polymerisation in presence of catalyst in a polymerisation reactor. Method then includes unloading of polyolefin particles from reactor and degassing of polyolefin particles with a nitrogen stream in a degassing tank. Degassing tank is partially filled with polyolefin particles. At continuous transfer of polyolefin particles from degassing tank into melt mixing device and unloading polyolefin particles from polymerisation reactor with constant speed, free space inside degassing tank receives additional polyolefin particles during at least 3 hours.EFFECT: providing operating flexibility for continuation of polymerisation process during a certain period of time during shutdown of melt mixing device without need to install storage containers between stages of degassing and granulation of polyolefin particles and minimisation of requirements in their pneumatic transportation.12 cl, 1 dwg

Polyethylene composition with high degree of swelling // 2607625
FIELD: chemistry.SUBSTANCE: invention relates to a polyethylene composition for making moulded articles of different types. Composition has density from 0.953 to 0.960 g/cm3 and ratio of MIF/MIP from 17–29, where MIF is melt flow index at 190 °C with load of 21.60 kg, and MIP is melt flow index at 190 °C with a load of 5 kg. Composition is obtained by polymerisation of ethylene, optionally together with one or more comonomers, in a gas phase reactor in presence of hydrogen and copolymerisation of ethylene with one or more comonomers in other gas-phase reactor in presence of a lower amount of hydrogen, than at step a). In at least one of said gas-phase reactors growing polymer particles flow upward through a first polymerisation zone under fast fluidisation or transfer conditions, come out of said zone, and enter a second polymerisation zone, through which they flow down by gravity, come out of said second polymerisation zone and reenter first polymerisation zone, creating circulation of polymer between polymerisation zones. All copolymerisation steps are carried out in presence of a Ziegler-Natta polymerisation catalyst deposited on MgCl2. Polyethylene composition contains one or more copolymers of ethylene and not more than 1 wt% of comonomer, selected from olefins of formula CH2=CHR, where R is alkyl radical, linear or branched, containing from 1 to 10 carbon atoms.EFFECT: obtained composition is characterised by good balance of physical and mechanical properties, high degree of swelling of extruded flow with surface of high quality and stability of dimensions of end product, environmental stress-cracking resistance (FNCT) and impact strength.4 cl, 1 dwg, 1 tbl
Slurry phase polymerisation process // 2607086
FIELD: chemistry.SUBSTANCE: invention relates to polymerisation of olefin in suspension reactors. Slurry process for polymerisation of ethylene is disclosed. Average polymerisation productivity [kg PE (polyethylene)/kg catalyst] per unit ethylene per 1 h, a1 during operation at any first residence time r1 is less than 1.7(a2r2-a1r1)/(r2-r1), where a2 is average polymerisation productivity [kg PE/kg cata] per unit ethylene per 1 h during operation at any second residence time r2 where r2>r1.EFFECT: technical result is increased efficiency during operation of reactor at high speed of obtaining polymer per unit volume of reactor.14 cl, 3 dwg, 3 tbl, 8 ex

Treatment method of polyolefin particles produced by gas-phase polymerization // 2600550
FIELD: technological processes.SUBSTANCE: invention relates to a method of treating polyolefin particles produced by gas-phase polymerization of one or several olefins in presence of a catalytic system of polymerization and alkane C3-C5 acting as a solvent of polymerization in a gas-phase polymerization reactor. Method involves continuous or periodical dropping of polyolefin particles from the gas-phase polymerization reactor, transfer of the particles to the stage of degassing consisting of three degasifiers. Polyolefin particles in the first degasifier contact with a gaseous flow containing at least 85 mol% of alkane C3-C5. Average time of polyolefin particles remaining in the first degasifier is from 5 minutes up to 5 hours. In the second degasifier polyolefin particles are in contact with a flow containing nitrogen and water vapour. Average time of polyolefin particles remaining in the second degasifier is from 5 minutes up to 2 hours. Herewith the contacting is carried out in conditions without condensation of moisture. In the third degasifier polyolefin particles are in contact with a flow of nitrogen. Average time of polyolefin particles being in the third degasifier makes from 5 minutes up to 8 hours. Also described is a method of preparing a polyolefin polymer.EFFECT: possibility of processing almost all monomers and comonomers simultaneously dropped with polyolefin particles to produce polyolefin products with good organoleptic characteristics without odour.12 cl, 1 dwg, 1 ex

ethod of producing ethylene-α-olefin-diene copolymer // 2599626
FIELD: chemistry.SUBSTANCE: present invention relates to a method of producing an ethylene-α-olefin-diene copolymer and obtained using said method ethylene-α-olefin-diene copolymer using a transition metal compound based on cyclopenta[b]fluorenyl group as a catalyst. Transition metal compound is represented by formula (1), in which values of radicals are given in patent claim.EFFECT: invention enables to obtain a copolymer with high content of diene, high coefficient of conversion and high degree of Mooney viscosity.13 cl, 1 tbl, 4 exFormula (1):

Spray drying-obtained catalyst compositions and polymerisation methods using same // 2598023
FIELD: chemistry.SUBSTANCE: invention relates to a composition for polymerisation of olefins, produced by spray drying. Composition contains a containing transition metal catalytic component, described by the following formula: in which M denotes Fe[II], Fe[III], Co[I], Co[II], Co[III], Mn[I], Mn[II], Mn[III], Mn[IV], Ru[II], Ru[III] or Ru[IV]; X denotes an atom or a group of connected covalent or ionic bond with metal M; T denotes metal oxidation state; b denotes valency of atom or group X; and R1-R7 are all independently selected from a group comprising hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl geterohydrocarbyl, substituted geterohydrocarbyl, aryl, substituted by hydrocarbyl aryl substituted by geterohydrocarbyl aryl, benzyl, substituted by hydrocarbyl benzyl, substituted geterohydrocarbyl benzyl and SiR′3, where evey R′ is independently selected from a group comprising hydrogen, halogen, hydrocarbyll substituted hydrocarbyl, geterohydrocarbyl, substituted geterohydrocarbyl; and if any two or more of R1-R7 denote hydrocarbyl, substituted gidrokarbil, geterohydrocarbyl, substituted geterohydrocarbyl, aryl, substituted by hydrocarbyl aryl, substituted by geterohydrocarbyl aryl, benzyl, substituted by hydrocarbyl benzyl or substituted by geterohydrocarbyl benzyl, then two or more of them can be associated with formation of one or more cyclic substitutes; activator for produced by spray drying the catalytic composition; and a substrate for activator and produced by spray drying catalytic composition. Also disclosed is a method for polymerisation and a polymer product.EFFECT: higher efficiency of a catalyst - transition metal complex.14 cl, 5 dwg, 4 tbl, 3 ex

Non-metallocene catalyst applied on carrier, its production and use // 2596186
FIELD: chemistry.SUBSTANCE: present invention relates to a method of producing non-metallocene catalyst applied on carrier. Method involves a step for bringing into contact non-metallocene ligand, chemical treatment agent, selecting from compound of IVB group metal and alkoxy-magnesium spherical carrier in the presence of a solvent for interaction. Alkoxy-magnesium spherical carrier has an average particle size from 100 to 2,000 microns. Non-metallocene ligand in the present method represents one or several agents selected from a group comprising compounds having the following structure wherein the values A, B, D, E, G, R1, R2, R3, d, qare given in the patent formula. Invention also suggests non-metallocene catalyst for homopolymerization /copolymerisation of olefins, method of homopolymerization /copolymerisation of olefins, polyethylene and chlorinated polyethylene.EFFECT: polyolefin, produced in accordance with this invention, is characterised by excellent morphology of particles, high bulk density and specific surface area, variant pore structure, required particle size distribution and molecular weight distribution, and is especially suitable as a starting substance for use in direct production of chlorinated polyolefin.12 cl, 1 tbl, 32 ex

Polyethylene and methods for production thereof // 2592276
FIELD: chemical industry. SUBSTANCE: invention relates to polyethylene resins. Described a copolymer comprising ethylene and 0.5-25.0 mol% C3-C20-olefin comonomer. Copolymer has following characteristics: ratio of rupture stress to tensile stress at an elongation of 100 %, equal to 2.5 or more; ratio of burst stress to tensile stress at an elongation of 300 %, equal to 2.4 or more; ratio of burst stress to tensile stress with primary yield strength equal to 2.9 or more; density equal to 0.910 g/cm3 or more; 1 % secant modulus of from 30 to 100 MPa; and a tensile stress equal to Y MPa or more, where Y = (0.0532) * Z-8.6733, and Z is expressed in percent strain and is a number of from 500 to 2,000. EFFECT: technical result is copolymers have an improved balance between softness, high lifting capacity and/or low ratio of maximum deformation/stress. 5 cl, 12 dwg, 26 tbl, 1 ex

Catalyst composition with improved looseness characteristics, and methods for production and use thereof // 2588129
FIELD: chemistry.SUBSTANCE: invention relates to a catalyst composition for polymerisation of olefins. Composition comprises (a) a catalyst compound, wherein catalyst compound is a metallocene catalyst containing a titanium, zirconium or hafnium atom, and (b) a metal carboxylate, wherein said metal carboxylate by differential scanning calorimetry is substantially free of carboxylic acid since metal carboxylate do not have any melting peaks at temperatures that are less than or equal to 75 °C. Metal carboxylate is described by formula: MQx (OOCR) y, wherein M is a metal of group 13 of Periodic Table of Elements; Q is halogen, hydroxy, alkyl, alkoxy, aryloxy, siloxy, silane or sulphonate group; R represents a hydrocarbyl radical containing from 12 to 30 carbon atoms; x is an integer from 0 to 3; y represents an integer of from 1 to 4; and sum of x and y equals valence of metal M. Also disclosed is a method for preparing a catalyst composition and method of polymerisation.EFFECT: invention provides a catalyst composition for polymerisation of olefins, which has improved flowability characteristics.16 cl, 4 dwg, 6 tbl

Novel polymer composition for use in blow moulding // 2586977
FIELD: technological processes.SUBSTANCE: invention relates to a polymer composition, preparation method thereof, use of said polymer composition for blow molding of containers and containers themselves. Polymer composition has density from 0.940 to 0.949 g/cm3, flow melt index (HLMI) according to DIN EN ISO 1133:2005, condition G, at 190 °C and 21.6 kg, from 3 to 7 g/10 min and branching circuit (HLCBI) from 3 to 8. Polymer composition contains homopolymers of ethylene and/or copolymers of ethylene C3-C8-alpha-olefins and is produced by polymerisation of one or more catalysts Ziegler in series of at least two reactors polymerisation.EFFECT: obtained composition is improved stability of dimensions of molded article from mold and cooling to ambient temperature, as well as high surface quality of finished product and good balance of mechanical properties (rigidity, impact strength, resistance to formation and growth of cracks caused by exposure environment).11 cl, 3 tbl, 3 ex
Polyethylene extruded articles // 2584694
FIELD: chemistry.SUBSTANCE: product relates to extruded products made from polyethylene. Described is a polymer film containing polyethylene. Polyethylene is obtained by method of polymerisation in the presence of products. Products are obtained by reacting a solid catalyst component, one or several hydro-carbyl compounds of aluminium and partially esterified polyalcohol.EFFECT: improved optical properties of film, particularly turbidity.5 cl, 3 ex

ethods for obtaining polyolefins, possessing multimodal molecular-weight distribution // 2579518
FIELD: chemistry.SUBSTANCE: described is method for obtaining multimodal polyolefin composition. Method includes interaction of first olefin monomer with mixed catalytic system under polymerisation conditions with formation of polyolefin component, possessing weight average molecular weight Mw, equal from 5000 to 600000 g/mol. Mixed catalytic system includes polymerisation catalyst, containing transition metal of group 4 or 5, chromo-organic polymerisation catalyst, activator and substrate material. Combination first polyolefin component/mixed catalytic system interacts with molecular switch, which contains oxygen and alkylaluminium, and combination first polyolefin component/mixed catalytic system interacts with second olefin monomer, which can coincide or not coincide with first olefin monomer, with obtaining multimodal polyolefin composition. Mixed catalytic system and method for thereof obtaining are also described.EFFECT: regulation of content of possessing different molecular weights polyolefins, which possess multimodal molecular-weight distribution.15 cl, 1 tbl, 2 dwg, 2 ex

Process of polymerisation or copolymerisation of ethylene-unsaturated monomers with presence of free-radical polymerisation initiators // 2575929
FIELD: chemistry.SUBSTANCE: invention relates to process of polymerisation or copolymerisation of ethylene-unsaturated monomers in presence of free-radical polymerisation initiators under pressure in the interval from 110 MPa to 500 MPa and temperatures in the range from 100°C to 350°C in apparatus of continuously proceeding polymerisation. Reaction gas mixture is compressed to polymerisation pressure by at least two successively operating compressors. Low-pressure compressor compresses reaction gas mixture to pressure from 10 MPa to 50 MPa. High-pressure compressor then compresses reaction gas mixture to polymerisation pressure parameter. High-pressure compressor operates with synthetic polyalkyleneglycol-based lubricating material. Oxygen is introduced into mechanism for fresh gas supply or into polymerisation installation in quantity providing oxygen content in the range 0.01-0.9 ppm in gas mixture, compressed in high-pressure compressor.EFFECT: reduction of sediment formation in high-pressure compressor and provision of compressor operation with higher capacity with reduction of compressor vibration.8 cl, 1 dwg, 2 ex

ethod of improving flow properties of polymer melts // 2574726
FIELD: chemistry.SUBSTANCE: invention relates to a method of improving flow properties of a melt comprising a thermoplastic polymer, which includes adding to a composition of said thermoplastic polymer before or during treatment of the melt 0.005-0.5 wt %, relative to the weight of the thermoplastic polymer, of one or more comb copolymers or comb block copolymers which are obtained at a first step a) by free-radical polymerisation of an alkyl ester of acrylic or methacrylic acid with 1-10 carbon atoms in the alkyl group and, optionally, one or more monomers without an ester bond, and at a second step b) by modification in a polymer analogous transesterification reaction with a primary or secondary alcohol to form a comb or comb block copolymer. The object of the invention is also the use of said comb copolymers or comb block copolymers to improve flow properties of a melt comprising a thermoplastic polymer.EFFECT: obtained comb copolymers or comb block copolymers reduce power consumption required for processing thereof, and reduce the risk of abruptions in the melt at high shearing rates.13 cl, 15 tbl, 39 ex

ethod for obtaining ethylene homopolymers or copolymers in tubular reactor with, at least, two reaction zones with different concentration of chain transfer agent // 2572821
FIELD: chemistry.SUBSTANCE: method is realised under pressure from 110 MPa to 350 MPa and at temperature from 100°C to 350°C in tubular reactor with, at least, two reaction zones. Reaction zones have different concentration of chain transfer agent. Concentration of chain transfer agent in first reaction zone constitutes less than 70% of concentration of chain transfer agent in reaction zone with the highest concentration of chain transfer agent. Also described is ethylene homopolymer or copolymer, obtained by claimed method, application of ethylene homopolymer and copolymer and method of application on substrate.EFFECT: obtaining low density polymers, suitable for application of coatings by extrusion, which have wide molecular distribution and higher degree of long-chain branching in LCB chain with high molecular weight.12 cl, 5 dwg, 1 tbl, 2 ex

Polymerisation method // 2572625
FIELD: chemistry.SUBSTANCE: described is a method of transitioning T1 from a process of polymerising ethylene or propylene, conducted in a polymerisation reactor in the presence of a catalyst a1, ethylene or propylene and optionally an olefin comonomer A1, to obtain an ethylene polymer or a propylene polymer P1, to a process of polymerising ethylene or propylene, conducted in the same polymerisation reactor in the presence of a catalyst a2, ethylene or propylene and optionally an olefin comonomer A2, to obtain an ethylene polymer or a propylene polymer P2. The catalysts a1 and a2 are different and compatible. The catalysts a1 and a2 are both active and are present in the reactor during at least part of the transition T1 from obtaining P1 to obtaining P2. The transition T1 is continuous.EFFECT: reduced amount of off-grade material obtained during the transition.13 cl, 2 ex

ethod of producing catalyst for polymerisation of ethylene and copolymerisation of ethylene with alpha-olefins // 2570645
FIELD: chemistry.SUBSTANCE: 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.EFFECT: obtaining polyethylene with high output and the required particle size of 450-800 mcm, with a narrow particle size distribution.2 cl, 1 tbl, 11 ex
Lock and method of degassing // 2567431
FIELD: instrumentation.SUBSTANCE: 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.EFFECT: assurance by system of determination locking of the increased hydrocarbons content leaving the degassing vessel, operating quickly, and easy in operation.12 cl, 2 ex
Blocking device and method of blocking // 2565587
FIELD: process engineering.SUBSTANCE: 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.EFFECT: perfected system of control over quality of return purging gas, reliable and simple system.10 cl, 1 ex

Catalyst systems and methods for use thereof to produce polyolefin products // 2563032
FIELD: chemistry.SUBSTANCE: invention relates to catalyst systems for producing polyolefins and methods for production thereof. The catalyst system includes a catalytically active compound with one type of active centres, a support which includes fluorinated aluminium oxide and aluminoxane. Content of the aluminoxane ranges from 8 mmol to 0.1 mmol per gram of the support.EFFECT: use of a fluorinated support which contains aluminium oxide enables to achieve high catalyst efficiency owing to a higher concentration of the transition metal-based component in the catalytically active compound with one type of active centres.15 cl, 8 tbl, 29 ex

ethod of producing reactor powder of ultrahigh molecular weight polyethylene by polymerisation of ethylene // 2561921
FIELD: chemistry.SUBSTANCE: invention relates to synthesis of reactor powder of ultrahigh molecular weight polyethylene. Described is a method of polymerising ethylene in a medium of aliphatic solvents using a catalyst based on functionalised bis-phenoxy-imine complexes of titanium chloride, activated with methylaluminoxane MAO. The catalyst is prepared in advance in toluene solution. The catalyst system is loaded in toluene solution with two-step loading of a MAO co-catalyst. Half of the calculated amount of MAO is added first without a catalyst. A second portion of MAO is then added with a catalytic complex while stirring intensely. The speed of the mixer increased to 1300 rpm. The catalyst used is one of three functionalised phenoxy-imine titanium halide complexes of the general structure , where (I) R1=isopropylbenzyl, R2=H; (II) R1=isopropylbenzyl, R2=Me; (III) R1=t-Bu, R2=OCH3.EFFECT: obtaining reactor powder of ultrahigh molecular weight polyethylene with improved morphology, which enables to process the reactor powder into ultrahigh-modulus and ultrahigh-strength bands and fibres via solvent-free cold moulding.8 cl, 1 tbl, 12 ex

ethod of producing polyolefin polymer with improved wax deposition // 2560179
FIELD: chemistry.SUBSTANCE: invention relates to a method of producing a polyolefin polymer by continuous suspension polymerisation of one or more olefin monomers in the presence of a polymerisation catalyst in at least one polymerisation reactor. The method is carried out at temperature of ot 40-120°C and pressure of 0.1-10 MPa. A suspension of solid polyolefin particles in a suspension medium is collected from the polymerisation reactor, where the suspension has a temperature of 65-120°C. The suspension collected from the polymerisation reactor is fed into a moderating vessel and held at temperature of 60-85°C for a period of time sufficiently long for the mean dwell dime of the suspension in the moderating vessel to be at least 5 minutes. The suspension from the moderating vessel is then collected and cooled to 20-55°C. The solid polyolefin particles are mechanically separated from the liquid suspension medium.EFFECT: fewer wax-like components in the liquid suspension medium.18 cl, 1 dwg, 1 ex
Polymer material with improved strength properties // 2552112
FIELD: chemistry.SUBSTANCE: described is a polymer material based on ultra-high-molecular-weight polyethylene (UHMWPE) GUR with molecular weight of 5 mln g/mol and average particle size of 100 mcm with improved strength properties. The UHMWPE is ground to obtain a homogeneous powder with average particle size of about 50 mcm. The powder is exposed to ultrasound with frequency of 35 kHz and power of 240 W for 40 minutes.EFFECT: obtaining polymer material with improved strength properties based on UHMWPE.1 tbl, 1 ex

Polyethylene composition and finished products obtained from it // 2545063
FIELD: chemistry.SUBSTANCE: group of inventions relates to polyethylene compositions for films or cast products. Composition has melt fluidity index at 5 kg/190°C (MI5 kg) from 0.25 to 3 g/10 min, Mz higher than 2000000 g/mol and lower than 370000 g/mol and Hostalen index (HI) value from 0.18 to 18. When melt fluidity index at 5 kg/190°C (MI5 kg) is higher than 1.9 g/10 min, Hostalen index (HI) value is higher than 1.EFFECT: polyethylene composition in accordance with invention, possessing specified molecular-weight distribution and long-chained branched structure, possesses improved technological properties, and obtained films have higher mechanical impact strength with film thickness being 10 mcm than at 20 mcm, in accordance with measurement of dart drop impact (DDI).9 cl, 4 tbl, 8 ex, 1 dwg

Olefin polymerisation method // 2540974
FIELD: chemistry.SUBSTANCE: invention relates to polymerisation of olefins in suspension reactors and particularly to particle size of a polymer obtained using said method. Described is a method of producing an olefin polymer by suspension polymerisation at 90-107°C in the presence of a chromium catalyst. The catalyst has activity of at least 1000 g polymer/g catalyst/h on a support with pore volume of at least 1.3 cm3/g. The method includes adding an antistatic agent to the polymerisation mixture in amount of 0.1-100 ppmw with respect to the diluent in the suspension. The obtained polymer has a particle size distribution which is such that less than 8 vol%, preferably less than 5 vol%, of the polymer particles have average diameter of 125 mcm or less.EFFECT: considerable reduction of formation of deposits and contaminants, preventing formation of an electrostatic charge, obtaining a polymer with uniform particle size distribution.12 cl, 4 dwg, 4 ex

Technology of continuous discharge and pressure regulation in polymerisation reactors // 2536204
FIELD: chemistry.SUBSTANCE: method includes the supply of diluents and the first monomer into the first polymerisation reactor, formation of the first polyolefin in the first suspension, continuous discharge of the transported suspension from the first polymerisation reactor into the second polymerisation reactor. After that, the polymerisation of the second monomer is performed in the second polymerisation reactor with the formation of the second polyolefin. By means of the first discharge device of a continuous action, located on the second polymerisation reactor, pressure regulation in the second polymerisation reactor is realised and the rate of the suspension flow, discharged from the first polymerisation reactor, is supported higher than 4 ft/sec (1.2 m/s).EFFECT: prevention of the reactor clogging and support of the suspension in a stable state in transportation makes it possible to increase efficiency, reduce the time of the system standstill and increase the total amount of production.20 cl, 6 dwg

Systems and methods of polymer production // 2533488
FIELD: chemistry.SUBSTANCE: invention relates to systems and methods, intended for the regulation of properties of polymers, obtained in gas-phase and liquid-phase processes. The method of a polymer obtaining includes the introduction of a chrome-based catalyst into a gas-phase reactor system, introduction of hydrogen into the reactor system, contact of a gaseous monomer with the catalyst in the reactor system with obtaining the polymer. The polymer is discharged from the reactor system, with the discharged polymer having the first index of fluidity. The discharged polymer is processed, with the processing including granulation of the discharged polymer. The granulated polymer has the second index of fluidity. A change of the fluidity index is determined. The change of the fluidity index represents the difference between the second and the first fluidity indices. The quantity of hydrogen, introduced into the reactor system, is regulated to control the value of the fluidity index change. The method of obtaining the polymer and the polymerisation reactor system are also described.EFFECT: improvement of the process regulation, reduction of the poor-quality polymer formation, improvement of the product properties.15 cl, 5 dwg, 1 tbl, 5 ex
ethod for increasing resistance of pipes to thermal-oxidative degradation // 2523479
FIELD: process engineering.SUBSTANCE: set of inventions relates to pipe and method of its production. Pipes feature resistance to thermal-oxidative degradation at pipe long-term contact with fluids containing disinfectants that possess oxidative effects. Forming composition for pipes comprises thermoplastic polyolefins and specific aromatic amines as the additive. The latter exist as fluid under standard conditions. Invention relates to the process of improving the long-term resistance of water pipes to disinfectants that feature oxidative effects.EFFECT: higher resistance to aggressive media.6 cl, 1 tbl
ulti-step ethylene polymerisation method // 2522439
FIELD: chemistry.SUBSTANCE: invention relates to a suspension method of producing an ethylene polymer having a melt flow ratio F/P greater than 25. The method is carried out in two or more polymerisation steps at temperature of 60-120°C. At least two of the two or more polymerisation steps are carried out at different concentration of a chain-terminating agent. The method is carried out in the presence of a catalyst system containing a product obtained by contacting a solid catalyst component and an organoaluminium compound. The solid component contains Ti, Mg and halogen and has porosity (PF) measured by a mercury method, and owing to the presence of pores with a radius equal to or less than 1 mcm, of at least 0.3 cm3/g, and surface area of less than 100 m2/g. Particles of the solid component have a spherical morphology and average diameter of 8-35 mcm.EFFECT: obtaining a polymer with a wider molecular weight distribution, good mechanical properties without or with minimal problems associated with homogeneity while maintaining good polymerisation activity.9 cl, 2 tbl, 2 ex

Catalyst on silica-clad alumina support // 2520223
FIELD: chemistry.SUBSTANCE: invention relates to catalysis. Described is an olefin polymerisation catalyst comprising: (I) a clad catalyst support comprising (a) a core which comprises alumina particles and (b) about 1-40 wt % silica, based on the weight of said cladding of the clad catalyst support on the surface of said core; said clad catalyst support having a BET surface area of not less than 20 m2/g; porosity of at least about 0.2 cm3/g; and a normalised sulphur uptake (NSU) value of up to 25 mcg/m2; and (II) 0.1-10 wt % , based on the weight of said catalyst, of catalytically active, with respect to olefin polymerisation, elemental transition metal, compound thereof, or complex thereof, wherein said transition metal is selected form Fe, Cr, Ti, Zr, Hf, Ni or mixture thereof, on the surface of said clad catalyst support. Methods of producing said catalyst and use thereof are described.EFFECT: high catalyst activity.21 cl, 2 dwg, 3 tbl, 12 ex

Films made from heterogeneous ethylene/alpha-olefin copolymer // 2519776
FIELD: chemistry.SUBSTANCE: invention relates to a multilayer film for making a finished article and a finished article having said film. The multilayer film includes at least two layers. The first layer includes a first a copolymer of ethylene and at least one alpha-olefin. The first copolymer has density of less than 0.925 g/cm3, and average viscosity molecular weight Mv and a valley temperature between the copolymer and high crystalline fraction, Thc, such that the Mv for a fraction above Thc from ATREF divided by Mv of the whole polymer from ATREF (Mhc/Mhp) is less than 1.95. The copolymer has composition distribution breadth index (CDBI) of less than 60%. One other second layer includes a second a copolymer of ethylene and at least one alpha-olefin. The second copolymer has density of 0.925-0.965 g/cm3.EFFECT: obtaining a film with improved optical properties, hardness, puncture resistance, tear resistance and manufacturability.15 cl, 3 tbl, 1 dwg, 1 tbl

Impact resistant low-density polyethylene (lldpe) composition and films made therefrom // 2517166
FIELD: chemistry.SUBSTANCE: invention relates to a low-density ethylene polymer with a multimodal comonomer distribution, a method for production thereof and moulded articles, including films, made from said polymer. The multimodal polyethylene has a wide molecular weight distribution MWD in the range from 3 to 8 and contains two polymer components. The first polymer component is 70-95 wt % copolymer of ethylene with at least one C3-C20-α-olefin comonomer, having MWD less than 5, CDBI greater than 60% and high-load melt index (@21.6 kg, 190°C) of 10-100 g/10 min. The second polymer component is 5-30 wt % substantially homopolymeric polyethylene, having MWD greater than 10, CDBI greater than 80% and high-load melt index (@21.6 kg, 190°C) of 0.2-20 g/10 min. Said multimodal polyethylene is obtained in a single reactor using a catalyst system containing at least two catalysts in form of transition metal complexes.EFFECT: polyethylene disclosed herein has considerably improved resistance to mechanical factors and excellent processing properties, which enable to avoid use of process additives when processing films.13 cl, 4 dwg, 3 tbl

System of olefin polymerisation catalyst // 2511448
FIELD: chemistry.SUBSTANCE: claimed invention relates to systems of catalysts of polymerisation of CH2=CHR olefins, where R represents alkyl, cycloalkyl or aryl radical, containing 1-12 carbon atoms, and to method of gas-phase ethylene (co)polymerisation. Catalyst contains (A) solid component of catalyst, which contains Ti, Mg, halogen and is characterised by porosity (PF), measured by method of mercury porosimetry and conditioned by pores with radius equal to or smaller than 1 mcm, which constitutes, at least, 0.3 cm3/g, (B) aluminium-alkyl compound and (C) monohalogenated hydrocarbon, in which halogen is bound with secondary carbon atom.EFFECT: claimed systems of catalysts are characterized by improved activity in polymerisation.10 cl, 3 tbl, 23 ex

ethod of transition between non-compatible systems of olefin polymerisation catalysts // 2510703
FIELD: chemistry.SUBSTANCE: invention relates to method of transition between non-compatible systems of olefin polymerisation catalysts in one reactor. Described is method of transition from system of Ziegler-Natta catalyst to system of Phillips catalyst for polymerisation of olefins in one reactor, where method includes the following stages: a) interruption of the reaction of the first polymerisation of olefins, carried out in presence of Ziegler-Natta catalyst as a result of suspension of supply of Ziegler-Natta catalyst into reactor and deactivation of Ziegler-Natta catalyst system, or suspension of supply of Ziegler-Natta catalyst system into reactor and increase of reactor temperature, or suspension of supply of Ziegler-Natta catalyst system into reactor and combined application of deactivating agent and increase or reduction of temperature; b) Supply of additional catalyst system, which contains (A) and (B) components resulting in obtaining, respectively, the first and the second polyolefin fractions, where Mw value of the first polyolefin fraction is less than Mw value of the second polyolefin fraction, carrying out reaction of the second polymerisation of olefins in presence of additional catalyst system, where initial activity of catalytic component (A) is higher than initial activity of catalytic component (B), suspension of supply of additional catalyst system into reactor; supply of Phillips catalyst system and carrying out reaction of the third polymerisation of olefins in presence of Phillips catalyst.EFFECT: elimination of necessity to empty reactor after each reaction of olefin polymerisation.12 cl, 6 ex, 5 tbl

Polymerisation catalysts, methods for production and use thereof and polyolefin products obtained using same // 2509088
FIELD: chemistry.SUBSTANCE: invention relates to catalyst systems for polymerising olefins, which contain a catalytic, high-molecular weight compound and a catalytic, low-molecular weight compound, a method for production thereof, a method of polymerising olefins, an ethylene polymer and an article made from the ethylene polymer. The high-molecular weight catalysts include metallocene catalysts. The second catalyst component has formula I (values of radicals are given in the claim). The second catalyst component is present in an amount of 0.001-5.0 mol % with respect to said first catalyst component. Said first catalyst component enables to obtain a polymer with weight-average molecular weight (Mw) of 40000-200000 g/mol, and the second catalyst component enables to obtain a polymer with Mw higher than 1000000 g/mol. The obtained ethylene polymer has at least one of the following properties: (a) melt strength greater than 6*MI-0.6675, (b) ratio of longitudinal viscosity, measured at rate of extension of 1 s-1, 190°C and exposure time of 4 s, to viscosity predicted based on linear viscoelastic properties for the same temperature and exposure time, greater than 3; (c) activation energy (Ea) less than 7 kcal/mol/K; (d) ratio Mz/Mw greater than the ratio Mw/Mn, where Mz is the z-average molecular weight of said polymer, Mw is the weight-average molecular weight of said polymer, Mn is the number-average molecular weight of said polymer; and (e) Van Gurp-Palmen plot, having a positive slope and having a maximum, wherein the Van Gurp-Palmen plot is a curve of phase shift versus the magnitude of the complex shear modulus, determined based on dynamic rheological properties, more specifically based on frequency sweep in the range of 0.01-100 rad/s at 190°C.EFFECT: obtaining bimodal compositions which are easy to process and have improved properties.28 cl, 7 dwg, 12 tbl, 44 ex
 
2551112.
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