|
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 |
|
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]. |
|
Catalyst systems and methods for use thereof to produce polyolefin products 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. |
|
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. |
|
Polypropylene mixture for tubes Invention relates to β-nucleated polypropylene mixtures. Described is a polypropylene mixture for making tubes. The mixture includes a component (A), which is a homo- or copolymer of propylene, obtained using a catalyst system with a single polymerisation centre and having a melt flow rate MFR2 (230°C) of not more than 0.9 g/10 min, and a component (B), which is a second homo- or copolymer of propylene, obtained using a Ziegler-Natta catalyst and having MFR2 (230°C) of 0.03-20 g/10 min, which expands molecular weight distribution from the view point of the polydispersity index of the whole composition. The component (A) and/or component (B) and/or composition of the polypropylene mixture are β-nucleated. The mixture has a shear thinning index SHI (0/50), measured according to ISO 6271-10, of 10-85. Also described is the use of the polypropylene mixture to make single-layer tubes or one of the layers of a multilayer tube. |
|
Adamantane-containing procatalyst composition and method Present invention relates to a procatalyst composition for producing a catalyst used for olefin polymerisation. Said composition includes a combination of a magnesium-containing component, a titanium-containing component and an internal electron donor containing adamantane dicarboxylate, where the adamantane dicarboxylate has the structure (III) where R1, R2 are identical or different, each of R1 and R2 is selected from a group consisting of a substituted hydrocarbyl group containing 1-20 carbon atoms, an unsubstituted hydrocarbyl group containing 1-20 carbon atoms and combinations thereof. The invention also relates to a catalyst composition for polymerisation of olefins, which contains said procatalyst composition, and a method of producing an olefin-based polymer using said catalyst composition. |
|
Photolatent titanium catalysts Invention refers to Ti-chelate catalytic compound for polyaddition or polycondensation reactions involving catalysing by Lewis acid-like agents. The above catalytic compound contains: (i) 50-99 wt % of at least one compound of formula I and (ii) 1-50 wt % of at least one chelate ligand of formula |
|
Catalytic system and method of obtaining reactor powder of superhigh-molecular-weight polyethylene Invention relates to problem of obtaining reactor powders of superhigh-molecular-weight polyethylene with special morphology and of certain dispersity, capable of processing into superstrong and supermodular fibres and tapes by method of cold solid-phase moulding and obtaining thereof based ropes, nets, body armour, helmets and other protective materials. Described is catalytic system for ethylene polymerisation based on substituted bis(phenoxyimine)titanium haloid complexes of general formula , given below, where (I) R1 = tertbutylethylphenyl, R2=H; (II) R1 = ethylphenyl, R2=H; (III) R1 is ethylphenyl, R2 is Me, activated with methylalumoxane, to obtain reactor powder of superhigh-molecular-weight polyethylene with improved morphology. Invention also relates to method of obtaining reactor powder of superhigh-molecular-weight polyethylene by method of catalytic polymerisation and to method of cold moulding of reactor powder of superhigh-molecular-weight polyethylene. |
|
Method of obtaining shock-resistant propylene polymer compositions Invention relates to a method of polymerisation for obtaining a polypropylene polymer composition. The method is performed in the presence of a system of catalysts, containing (a) solid catalytic component, which has an average size of particles from 15 to 80 mcm, containing magnesium halogenide, titanium compound, possessing, at least, a bond Ti-halogen, and, at least, two electron-donor compounds, one of which is present in an amount from 50 to 90 wt % relative to the total quantity of donors, one of which is selected from succinates, and the second is selected from 1,3-diethers, (b) alkylaluminium and, optionally, (c) internal electron-donor compound. The method includes contact of the catalytic components (a), (b) and, optionally, (c), then, preliminary polymerisation to a degree of pre-polymerisation from 0.1 to 1000 g per gram of the solid catalytic component (a), then polypropylene polymerisation with obtaining a propylene (co)polymer, at least, 85 wt % of which are not soluble in xylene at 25°C, and the following stage, carried out in a gas phase, polymerisation of the mixture of ethylene with α-olefins CH2=CHR, where R is a hydrocarbon radical, containing 1-10 carbon atoms, with obtaining an ethylene copolymer. |
|
Copolymers and films based thereon Invention relates to a copolymer of ethylene and alpha-olefin, containing from 7 to 12 carbon atoms. The ethylene copolymer has a density (D) from 0.900 to 0.940 g/cm, a melt index MI2 (2.16 kg, 190°C) from 0.01 to 50 g/10 min, a modulus of the melt elasticity G' (G"=500 Pa) from 20 to 150 Pa and the tear strength in a longitudinal direction (MD), ≥220 g, the tear strength in a transverse direction (TD)≥470 g, the impact strength in test with a falling sharpened object (DDI) ≥1800 g, in a form of a blow 25 mcm-thick film, obtained from the copolymer. MD represents the longitudinal direction, and TD represents the transverse direction in the blow film manufacturing. The copolymer is obtained in a gas phase with the application of an applied metallocene catalytic system. Also described is the copolymer, satisfying the ratio DDI≥21500×{1-Exp[-750(D-0.908)2]}×{Exp[(0.919-D)/0.0045]}. The blow film, including the ethylene copolymer is described. |
|
Impact propylene copolymer and method of obtaining thereof Invention relates to method of obtaining impact propylene copolymer with low content of volatile organic compounds, composition based on impact propylene copolymer and product based on it. Method includes contact of propylene with catalytic composition, including substituted 1,2-aromatic phenylene diether in polymerisation conditions in first polymerisation reactor. Propylene-based active polymer formed in first reactor contacts with at least one olefin in conditions of polymerisation in second reactor. Formed in second reactor impact propylene copolymer contains substituted 1,2-aromatic phenylene diether. |
|
System of olefin polymerisation catalyst 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. |
|
Invention is aimed at metallocene compound, which can ensure process of polymerization with obtaining olefin polymer or copolymer with high polymerization activity and stability, which are preserved for long time, and catalyst composition, which includes it, and method of olefin polymerization, applying it. Metallocene compound is described by the following formula (4HInd)(Cp')MX2, where 4Hind represents group, that has tetrahydroindenyl core, Cp' represents indenyl group, 4HInd is non-substituted, and Cp' is non-substituted or substituted with one or several substituents, and substituents are identical to each other or different from each other and represent radical, selected from group, consisting of alkyl or aryl group, and M represents transition metal from group IV of periodic table, and X are identical to each other or different from each other and represent halogen atoms. |
|
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. |
|
Described is a method of producing an anti-turbulent additive with monomer recycling, a method of producing an anti-turbulent additive, a method of producing higher poly-α-olefins for said methods and an anti-turbulent additive based thereon. The methods employ a substance with a boiling point higher than that of the starting monomer by not less than 73°C as a precipitation agent for the obtained polymer. |
|
Method of obtaining linear alpha-olefins Invention relates to method of obtaining linear alpha-olefins (LAO) by oligomerisation in presence of solvent and homogenous catalyst. Method includes (i) supply of ethylene, solvent and catalyst into oligemorisation reactor, (ii) oligomerisation of ethylene in reactor, (iii) removal of reactor outlet flow, which contains solvent, linear alpha-olefins, not necessary unreacted ethylene and catalyst, from reactor through system of discharge pipes of reactor, (iv) addition of at least one additive from polyamines, amines or alkanolamines, (v) supply of additive-containing outlet flow of reactor into zone of deactivation and removal of catalyst, (vi) deactivation of catalyst by alkaline and removal of deactivated catalyst from reactor product flow. Time during which additive remains in output flow of reactor before mixing with alkaline constitutes at least 10 seconds and does not exceed 100 seconds. |
|
Method for polymerisation of olefin-based polymers Present invention relates to a method of producing olefin-based polymers. Described is a method of producing olefin-based polymers, which involves polymerisation of at least one monomer in a gas phase in the presence of at least the following components: A) a catalyst which contains metals Mg, Ti, Hf and optionally Zr; B) a co-catalyst which is trialkylaluminum; C) a composition containing at least one compound selected from compounds of formula (1) and at least one compound selected from compounds of formula (II): (R1CO2)2AlOH (1), (R2)xN(R3OH)y (II); where R1 is a hydrocarbon radical containing 13-25 carbon atoms; R2 is a hydrocarbon radical containing 14-26 carbon atoms; R3 is a hydrocarbon radical containing 1-4 carbon atoms, and x+y=3, and x equals 1 or 2. Described also is a method of producing olefin-based polymers, which involves polymerisation of at least one monomer in a suspension process, in the presence of at least the following components: A) a catalyst which contains metals Mg, Ti, Hf and optionally Zr; B) a co-catalyst which is trialkylaluminum; C) a composition containing at least one compound selected from compounds of formula (1) and at least one compound selected from compounds of formula (II): (R1CO2)2AlOH (I), (R2)xN(R3OH)y (II); where R1 is a hydrocarbon radical containing 13-25 carbon atoms; R2 is a hydrocarbon radical containing 14-26 carbon atoms; R3 is a hydrocarbon radical containing 1-4 carbon atoms, and x+y=3, and x equals 1 or 2. Described is a method of producing olefin-based polymers, which involves polymerisation of at least one monomer in the presence of at least the following components: A) a Ziegler-Natta catalyst which contains metals Mg, Ti, Hf and optionally Zr; B) a trialkylaluminum compound; C) a composition containing at least one compound selected from compounds of formula (1) and at least one compound selected from compounds of formula (II): (R1CO2)2AlOH (I), (R2)xN(R3OH)y (II); where R1 is a hydrocarbon radical containing 13-25 carbon atoms; R2 is a hydrocarbon radical containing 14-26 carbon atoms; R3 is a hydrocarbon radical containing 1-4 carbon atoms, and x+y=3, and x equals 1 or 2. |
|
Catalyst components for polymerisation of olefins Invention relates to polymerisation of CH2=CHR olefins, where R is hydrogen or a C1-C12hydrocarbon group, and to catalysts therefor. A pre-polymerised catalyst component contains a solid component containing Mg, Ti, a halogen and an electron donor (ID), selected from alkyl esters of aromatic dicarboxylic acids. The molar ratio ID/Mg ranges from 0.025 to 0.065 and the molar ratio Mg/Ti is greater than 13. Said pre-polymerised catalyst component contains up to 50 g of an ethylene prepolymer per g of said solid catalyst component. |
|
Film is made by extrusion from an ethylene and alpha-olefin compolymer. Said ethylene and alpha-olefin copolymer is obtained during a gas-phase polymerisation process with formation of particles in the presence of a monocyclopentadienyl metallocene complex, a co-catalyst of general formula (L*-H)+ d(Ad-), where L* is a neutral Lewis base, (L*-H)+ d is a Brоnsted acid, Ad- is a non-coordinating associative anion, having a charge d- and the anion includes an aryl-substituted borate, and d is an integer ranging from 1 to 3, of carrier material and alpha-olefin. Polymer film contains less than 300-600 gels/m2 with size from 100 to 2000 mcm according to the invention of an optical inspection system. |
|
Self-limiting catalyst composition with bidentate internal donor Catalyst composition contains: one or more Ziegler-Natta procatalyst compositions having one or more transition metal compounds and an internal electron donor, containing a bidentate compound having at least two oxygen-containing functional groups which are separated by at least one saturated C2-C10 hydrocarbon chain; one or more aluminium-containing cocatalysts; and an external electron donor containing a mixture of a selectivity determining agent, selected from a group consisting of an alkoxy silane composition and a diether, and an activity limiting agent, selected from a group consisting of an ester of an aromatic mono- or polycarboxylic acid and a fatty acid ester. |
|
High melt flow rate, impact-resistant propylene copolymer and method for production thereof Polymerisation method involves contacting propylene and optionally at least one other olefin with a catalyst composition in a first polymerisation reactor under gas-phase polymerisation conditions, the catalyst composition containing a procatalyst, a cocatalyst and a mixed external electron donor (M-EED) containing a first selectivity control agent (SCA1), a second selectivity control agent (SCA2), and an activity limiting agent (ALA); forming, in a first polymerisation reactor, an active propylene-based polymer having a melt flow rate greater than about 100 g/10 min as measured in accordance with ASTM D1238-01 (230°C, 2.16 kg); contacting the active propylene-based polymer with at least one olefin in a second reactor under polymerisation conditions; and obtaining an impact-resistant propylene copolymer having a melt flow rate greater than about 60 g/10 min. A version of the method and the polymer is disclosed. |
|
Method of obtaining modified titanium-magnesium nanocatalyst Invention relates to production of polymers, specifically metal complex polymerisation catalysts, and can be used to produce trans-1,4-polyisoprene. Described is a method of obtaining a modified titanium-magnesium nanocatalyst for polymerisation of isoprenate by reacting magnesium with titanium tetrachloride and butyl chloride in volume ratio of 1/(63-190), followed by washing and further modification with phosphine of general formula R3P, where R=aryl, alkyl or a thiol of general formula R1SR2, where R1, R2=aryl, alkyl or carbon disulphide. In the nanocatalyst, the ratio phosphorus/titanium in the case of phosphine or sulphur/titanium in the case of thiol or carbon disulphide ranges from 1 to 20 mol/mol. |
|
|
Invention relates to Ziegler-Natta catalysts. Described is a catalyst composition containing: Ziegler-Natta procatalyst composition containing titanium, magnesium and an internal electron donor, containing at least two oxygen-containing functional groups, the oxygen-containing functional groups being separated by at least one saturated C2-C10 hydrocarbon chain which can optionally contain a heteroatom; organoaluminium compounds as a cocatalyst; and a mixed external electron donor (M-EED) comprising an activity limiting agent (ALA), a first selectivity control agent (SCA1) containing an alkoxysilane, a second selectivity control agent (SCA2) selected from a group consisting of an alkoxysilane, a diether, and a dialkoxybenzene, wherein the molar ratio SCA1:SCA2 ranges from 0.1:1 to 1.0:1, the molar ratio of total-SCA to ALA is less than 1.0, and wherein the ALA is selected from a group consisting of an aromatic ester or a derivative thereof, an aliphatic ester or a derivative thereof, a diether, poly(alkylene glycol) of an ester and combinations thereof. |
|
Invention relates to pipeline transportation of liquid hydrocarbons and specifically to methods of reducing hydrodynamic resistance of said liquids. Described is a method of producing a suspension-type anti-turbulence additive. The method involves producing a fine-grained polymer which is soluble in carbonaceous liquids. The polymer is synthesised by (co)polymerisation of higher α-olefins under the action of a Ziegler-Natta catalyst. The (co)polymer of higher α-olefins used is a casting polymerisation product. A fine dispersion of the polymer is obtained by thermal re-precipitation of the polymer in a liquid which is a nonsolvent for the polymer at room temperature and capable of dissolving it at a higher temperature. |
|
|
Controlling branching level and viscosity of poly-alpha-olefins by adding propene Invention relates to a poly-alpha-olefin obtained from a decene and propene and having a branching level greater than 19% and to a method of producing such poly-alpha-olefins. The decene is 1-decene. Described is a method of producing a poly-alpha-olefin from at least two monomers, where two monomers include decene and propene. Polymerisation takes place in the presence of a metallocene catalyst Ph2C(Cp-9-Flu)ZrCl2 and an aluminoxane cocatalyst. Described also is a method which involves steps, among others, of providing correlation between the total amount of propene used to form poly-alpha-olefin and at least one of the characteristics of the poly-alpha-olefin: the branching level or viscosity of the poly-alpha-olefin. |
|
Method of preparing titanium catalyst for stereospecific polymerisation of isoprene Invention relates to petrochemical industry. Described is a method of preparing a titanium catalyst for stereospecific polymerisation of isoprene in the presence of a catalyst system TiCl4-Al(i-C4H9)3-diphenyloxide-piperylene by mixing toluene solutions of titanium tetrachloride, which contains phenyl oxide, and triisobutylaluminium, which contains piperylene, in molar ratio of the titanium and aluminium components of the catalyst to diphenyl oxide and piperylene of 1:0.15, at temperature of (-20)-(-10)°C, followed by circulation of the catalyst on an outer loop with collection of isoprene for polymerisation, wherein a small tubular turbulent reactor with a diffuser-confusor design is mounted at the step for circulation on the outer mixing loop. |
|
|
Method of producing copolymers of olefin monomers with cyclic or linear dienes Invention relates to a method of producing olefin/diene copolymers on a homogeneous metallocene catalyst system. Described is a method of producing copolymers of monomers by polymerisation of olefins or a mixture of olefins and linear or cyclic dienes in the presence of a homogeneous catalyst system. The catalyst system consists of dialkyl bridged bis-indenyl metallocene complexes of group IVB metals and aluminium trialkyls. |
|
Method of producing high-fluidity propylene polymers Invention relates to a method of producing propylene polymers. The obtained propylene polymer has melt flow rate (230°C, 2.16 kg) higher than 30 g/10 min. The method is realised in the presence of a catalyst system comprising (a) a solid catalyst component containing Mg, Ti, halogen and an electron donor compound selected from succinates; (b) an alkylaluminium cocatalyst; and (c) a silicon compound of formula R1Si(OR)3, in which R1 is a branched alkyl and R is independently a C1-C10 alkyl. A method of producing a propylene polymer composition and heterophase compositions is also described. |
|
Invention provides reactor thermoplastic polyolefins having high fluidity and excellent surface quality, which contain (A) a matrix of a propylene homo- or copolymer whose weight ratio ranges from 40 to 90% with ISO 1133 MFR index (230°C, nominal load of 2.16 kg)≥200 g/10 min, and (B) an elastomeric copolymer of ethylene and propylene whose weight ratio ranges from 2 to 30%, with characteristic viscosity of IV (according to ISO 1628 in decalin as a solvent)≤2.8 dl/g with weight ratio of ethylene ranging from more than 50 to 80% and (C) an elastomeric copolymer of ethylene and propylene whose weight ratio ranges from 8 to 30%, with characteristic viscosity IV (according to ISO 1628 in decalin as a solvent) ranging from 3.0 to 6.5 dl/g and with weight content of propylene ranging from 50 to 80%. The reactor thermoplastic polyolefins are obtained in a process by multistep polymerisation, involving at least 3 successive steps, in the presence of a catalyst comprising (i) a Ziegler-Natta procatalyst which contains a product of transesterification of a lower alcohol and a phthalic ester of complex acids, (ii) an organometallic cocatalyst and (iii) an external donor of formula (I), Si(OCH2CH3)3(NR1R2), where values of R1 and R2 are given in the claim. The invention also discloses a multistep process of producing said polyolefins, involving either a combination of one loop reactor and two or three gas-phase reactors, or a combination of two loop reactors and two gas-phase reactors, connected in series. Disclosed polyolefins are used to produce articles for the automobile industry by pressure casting. The invention also relates to articles moulded from the reactor thermoplastic polyolefins. |
|
Self-limiting catalyst system with controlled aluminium to sca ratio and method Catalyst composition contains: one or more Ziegler-Natta procatalyst compositions having one or more transition metal compounds and one or more internal electron donors in form of esters of aromatic dicarboxylic acid, one or more aluminium-containing cocatalysts and a selectivity control agent (SCA) which contains a mixture of (i) a first alkoxy silane and a second alkoxy silane and (ii) an ester of C4-C30-aliphatic acid, and the molar ratio of aluminium to total SCA ranges from 0.5:1 to 4:1. |
|
High-purity heterophase propylene copolymers Invention relates to a catalyst system, production and use of high-purity heterophase propylene copolymers which contain (A) a matrix of a propylene homo- or copolymer whose weight ratio ranges from 73 to 98%, with ISO 1133 MFR2 index ≥45 g/10 min and (B) an elastomeric copolymer whose weight ratio ranges from 2 to 27%, wherein the weight ratio of propylene is at least 50% of component (B) and weight ratio of ethylene and/or any other C4-C10 alpha-olefin is at least 50% of component (B). Propylene copolymers are obtained during multi-step polymerisation in the presence of the catalyst system, including (i) a Ziegler-Natta procatalyst which contains a product of transesterificatin of a lower alcohol and a phthalic ester of complex acids, and (ii) possibly an organometallic cocatalyst, and (iii) an external donor of formula (I) Si(OCH2CH3)3(NR1R2), where elements R1 and R2 can be the same or different hydrocarbon groups, each containing 1-12 carbon atoms. The copolymers are used to produce moulded articles. |
|
Composition contains a catalytic compound, an activator, optional support and liquid solvent, and a hydroxy carboxylate addition salt of a metal , where Rf denotes hydrogen, halogen or C1-6 alkyl. The polymer composition contains a product of polymerisation of one or more olefin monomers in the presence of a catalyst composition, wherein the hydroxy carboxylate addition salt of a metal is or , where Rc denotes hydrogen, halogen or C1-6 alkyl. |
|
Olefin polymerisation catalyst and method for polymerisation of olefin using said catalyst Catalyst contains an organic compound of formula 1, an organometallic compound of formula 2, an organic transition metal compound of formula 3 and aluminoxane. Formula 1: R1-H or R1-Q-R1, where R1 is a cyclic hydrocarbyl group containing 5-30 carbon atoms and at least 2 conjugated double bonds, and can be unsubstituted or can contain 1-6 substitutes which are selected from alkyl groups containing 1-20 carbon atoms; Q is a divalent group for bridging groups R1, which is a (CR5 2)b group, where the substitute R5 is a hydrogen atom, b is an integer from 1 to 4. Formula 2: M1R2 mR3 nR4 pR6 q, where M1 is an element selected from a group consisting of group 1 and 2 elements, R2, R3, R4 and R6 independently denote a hydrocarbyl group containing 1-24 carbon atoms, m, n, p and q are independently equal to 0 or 1, and the sum m+n+p+q is equal to the valence of M1. Formula 3: M2R7 rXs, where M2 is titanium (Ti), zirconium (Zr) or hafnium (Hf), R7 is as defined for R1, X is a halogen atom, r is equal to 0 or 1, s is equal to 3 or 4, and the sum r+s is equal to the valence of metal M2. A method for polymerising olefin is also provided. |
|
Catalyst contains tetracyclopentadienyl zirconium (C5H5)4Zr, aluminoxane, a polyalkyl derivative of a nontransition metal MtRn, where Mt is a group IIA-IVA nontransition metal, and R = CH3, C2H5, C3H7, C4H9, iso-C4H9, C8H17; and/or titanium tetraalkoxide. The catalyst can have a support selected from a group comprising silica gel, ash from burning rice husks, kaolin or diatomite. The catalyst is biphase and contains a solid and liquid phase. The solid phase is metallocene and aluminoxane pre-deposited on the support, and the liquid phase is a solution of titanium tetraalkoxide in an aliphatic or aromatic solvent. Medium- or low-density polyethylenes are obtained in the presence of said catalyst. Medium and low-density polyethylene with given molecular weight, molecular-weight distribution and branching is obtained by varying the molar ratio titanium alkoxide/metallocene and MtRn/metallocene in the catalyst. |
|
Self-limiting catalyst composition with no silane Described is a catalyst composition including one or more Ziegler-Natta procatalyst compositions containing one or more transition metal compounds and an internal electron donor, one or more aluminium containing cocatalysts, and a selectivity control agent (SCA), which contains a mixture of a carboxylic acid ester and a compound which does not contain silane, selected from the group consisting of a diether compound, a succinate compound, a piperidine compound and combinations thereof. |
|
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. |
|
Metallocene catalysts and use thereof in polymerisation processes Invention relates to a method of polymerising olefin(s) to obtain polymers with improved film turbidity in the presence of cyclotetramethylene silyl (tetramethylcyclopentadienyl)(cyclopentadienyl) zirconium dimethyl, activated with an activator, on a support. Also disclosed is a method of improving polymer film turbidity comprising the following steps: a) obtaining a polymer via polymerisation of ethylene, olefin monomer containing 3-8 carbon atoms, and optionally one or more other olefin monomers containing 2-30 carbon atoms, in the presence of a catalyst system - metallocene, LA(R'SiR')LBZrQ2, activated with an activator deposited on a support; b) mixing the polymer obtained at step (a) with another polymer containing olefin monomers containing 2-30 carbon atoms. |
|
Catalyst systems and polymerisation processes Invention relates to an olefin polymerisation method using multimodal catalyst systems, a method of monitoring ageing of a multimodal catalyst system and to a container or a reservoir. The first method involves (a) preparation of a catalyst system comprising a bisamide catalyst system and a non-bisamide catalyst system; (b) storing the multimodal catalyst system at controlled temperature lower than 1°C; (c) bringing the multimodal catalyst system into contact with C2-C4-alpha-olefin during a polymerisation process; and (d) obtaining a multimodal polymer. The second method involves (a) preparation of said catalyst system; and b) transporting said system in a portable reservoir, where the portable reservoir is kept at controlled temperature lower than 1°C or -9°C. The container or reservoir contains a multimodal catalyst system kept at the controlled temperature. The disclosed group of inventions enables to minimise loss of efficiency of the catalyst system during storage/ageing. |
|
Method of polymerising polyolefins in solution Described is a method of polymerising ethylene and one or more C3-30 α-olefins or diolefins under continuous polymerisation conditions in a solution to obtain a high-molecular weight interpolymer having narrow molecular-weight distribution and improved processability, said method involving polymerisation in the presence of a catalyst composition containing a zirconium complex of a polyvalent aryloxy ether of formula: , where: R20 in each case independently denotes a group of inertly substituted arylene consisting of 6-20 atoms, excluding hydrogen or any other atoms of any other substitute, said group being substituted in a position neighbouring the oxyl-metal bond by a cyclic ligand, said cyclic ligand containing 6-30 atoms, excluding hydrogen; T3 denotes a divalent hydrocarbon or silane group having 1-20 atoms, excluding hydrogen; and RD in each case independently denotes a univalent ligand group consisting of 1-20 atoms, excluding hydrogen, where the catalyst composition further contains a chain transfer agent which is present in the reactor in amount which is sufficient to reduce Mw of the obtained polymer by at least 30% compared to molecular weight of the polymer obtained without a chain transfer agent. Described also is a method of polymerising ethylene and one or more C3-8 α-olefins using said zirconium complex of a polyvalent aryloxy ether, and an activating cocatalyst under continuous polymerisation conditions in a solution at temperature from 120 to 250°C with more than 85 mol % conversion of ethylene, characterised by that the obtained polymer has density between 0.855 and 0.950 g/cm3 , Mw/Mn less than 3.0, melt index (MI) from 0.1 to 40 and I10/I2>11.75(MI)-0.188. Described is a copolymer of ethylene and one or more C3-8 α-olefins, obtained using said method, having density between 0.855 and 0.885 g/cm3 , Mw/Mn less than 3.0, melt index (MI) from 0.1 to 40 and I10/I2>11.75(MI)-0.188. |
|
Preparation of catalyst paste for olefin polymerisation 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. |
|
Solid titanium catalyst component, olefin polymerisation catalyst and olefin polymerisation method Invention discloses a solid titanium catalyst component (I), containing titanium, magnesium, a halogen, a cyclic ester compound (a) and a cyclic ester compound (b); an olefin polymerisation catalyst containing said catalyst component (I); an olefin polymerisation method using said olefin polymerisation catalyst. |
|
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. |
|
|
Catalyst system for producing polypropylene copolymers Described is a catalyst system for producing propylene copolymers, in which the weight ratio of the comonomer to the sum of monomers present in said polypropylene copolymer (comonomer/(comonomer + propylene)) is equal to at least 2.0 wt %, containing (a) procatalyst composition containing (i) a group 4-6 transition metal compound (IUPAC, Nomenclature of inorganic chemistry, 1989), (ii) MgCl2 and (iii) an intrinsic donor in which said intrinsic donor contains diethyl phthalate, and (b) an extrinsic donor which is diisopropyl diethoxy silane (DIPDES), and (c) an organometallic cocatalyst. The invention describes a method of producing the described catalyst system in which a procatalyst is obtained at the first step and an extrinsic donor and a cocatalyst are added at the second step. The invention also describes propylene copolymers obtained in the presence of the described catalyst system. |
|
Present invention relates to a bis-arylaryloxy catalyst system for producing ethylene homopolymers or copolymers of ethylene with α-olefins. Described is a transition metal-containing bis-arylaryloxy catalyst of formula 1, which contains cyclopentadienyl or derivative thereof around a transition metal and two aryloxide ligands substituted with aryl derivatives in ortho-positions, wherein the ligands do not form a bridge with each other: where M denotes a group IV transition metal; Cp denotes cyclopentadienyl or derivative thereof, which can form a η5-bond with the central metal atom; each of R1, R2, R3, R4, R5, R6, R7, R8 and R9 on aryl phenoxide ligands independently denotes a hydrogen atom, a halogen atom, a straight C1-C20-alkyl group or a branched C3-C20-alkyl group, optionally substituted with at least one halogen atom, a silyl group containing a straight C1-C20-alkyl group or a branched C3-C20-alkyl group, optionally substituted with at least one halogen atom, a C6-C30-aryl group optionally substituted with at least one halogen atom, a C7-C30-arylalkyl group optionally substituted with at least one halogen atom, alkoxy group, having a straight C1-C20-alkyl group or branched C3-C20-alkyl group, optionally substituted with at least one halogen atom, siloxy group substituted with C3-C20-alkyl or C6-C20-aryl, amide- or phosphide group, having a C1-C20-alkyl group, C6-C20-aryl group, C7-C20-arylalkyl group, or a mercapto- or nitro group, substituted with C1-C20-alkyl, where these substitutes can also be optionally bonded with each other to form a ring; and X is selected from a group consisting of a halogen atom, C1-C20-alkyl group other than Cp, C7-C30-arylalkyl group, alkoxy group having a C1-C20-alkyl group, siloxy group substituted with C3-C20-alkyl and an amide group having a C1-C20-alkyl group, C6-C20-aryl group or C7-C20-arylalkyl group. The invention also describes a bis-arylaryloxy catalyst system for producing ethylene homopolymers or copolymers of ethylene with α-olefins, containing said transition metal-containing bis-arylaryloxy catalyst of formula 1, which contains cyclopentadienyl or derivative thereof, around a transition metal and two aryloxide ligands, substituted with aryl derivatives in the ortho-positions, wherein the ligands do not a bridge with each other, and an aluminoxane cocatalyst or boron compound as a cocatalyst. Described is a method of producing a copolymer of ethylene with α-olefin using said bis-arylaryloxy catalyst system, in which the α-olefin comonomer for polymerisation with ethylene is at least one α-olefin selected from a group consisting of 1-butene, 1-hexene, 1-octene and 1-diene, and content of ethylene in the copolymer of ethylene and α-olefin is not greater than 60 wt %. The invention also describes a method of producing an ethylene homopolymer or a copolymer of ethylene with α-olefin using said transition metal-containing bis-arylaryloxy catalyst, in which pressure of the ethylene monomer in the reactor is equal to 10-150 atm and polymerisation of the ethylene monomer is carried out at 80-250°C. |
|
Method of producing titanium-magnesium nanocatalyst for (co) 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 producing branched polypropylene Described is a method of producing branched polypropylene, having branching index g' less than 1.00. The method includes a step for polymerisation of propylene and, optionally, another (other) comonomer(s) in non-critical conditions in a reaction vessel. Pressure in the polymerisation process is at least 45.4 bars (4540 kPa). Temperature in the polymerisation process is lower than 90°C. Polymerisation takes place in the presence of a catalyst system, having surface area not greater than 350 m2/g measured in accordance with ISO 9277. Said catalyst system contains a metallocene catalyst, having zirconium as a transition metal and two cyclopentadienyl rings of different chemical structure. Described also is a method of polymerisation in the presence of the catalyst system having pore volume less than 3.50 cm3/g measured in accordance with DIN 66135 (N2). |
|
Method involves bringing hydrogen and ethylene monomers into contact with a composition deposited on a catalyst support based on several transition metals to obtain a polyolefin composition; where the composition deposited on the catalyst support based on several transition metals contains: (a) at least two catalyst components selected from a group consisting of: non-metallocene catalyst component which is a Ziegler-Natta catalyst, and a metallocene catalyst component of formula CpACpBMXp and CpA(A)CpBMXp, where each of CpA and CpB is identical or different and is unsubstituted or substituted with a cyclopentadienyl ring, each of which is bonded with M; M is an atom of a group 4 element; X is selected from a group consisting of C1-C6 alkyls, C6 aryls, C7-C12 alkylaryls, fluorinated C1-C6 alkyls, fluorinated C6 aryls, fluorinated C7-C12 alkylaryls, chlorine and fluorine; n equals 1 or 2; (A) denotes a divalent bridging group; and at least one X denotes fluorine or fluorinated hydrocarbonyl; (b) support material which is characterised by D50 value less than approximately 30 micrometres, and particle size distribution characterised by ratio D90/D10 less than approximately 5; and (c) an activator. The invention also discloses a composition deposited on the catalyst support, a polymer and a film. |
|
Copolymers of ethylene and propylene and production method thereof Invention relates to copolymers of ethylene and propylene and a method of producing said copolymers. The copolymers of ethylene and propylene contain 4.5-7 wt % ethylene. Mw/Mn is equal to 3.5-5.5, Mz/Mw is less than 4. There are no 2-1 regioinversions. Melting point is lower than 143°C. The method of producing the copolymers is realised in a suspension based on liquid propylene as the polymerisation medium in the presence of a catalyst system. The catalyst system consists of a titanium compound having a bond between a halogen and titanium and an electron donor compound which is selected from 1,3-diethers of formula (I). Both compounds are deposited on magnesium chloride. The catalyst system additionally includes an organoaluminium compound as a cocatalyst. |
|
Invention relates to a metallocene bridge compound of formula (II), in which: M denotes a transition metal atom selected from group 4 metals; X, identical or different, denote a halogen atom; L denotes a Si(R11)2 group, where R11 denotes a C1-C40-alkyl radical; R1 denotes a linear C1-C10-alkyl radical; R4 denotes a hydrogen atom; R11 and R12 denote a hydrogen atom or C1-C10-alkyl radicals; R7 denotes a branched C1-C40-allkyl radical, in which the carbon atom in the alpha-position is a tertiary carbon atom; and R6, R8, R9 and R10 denote hydrogen atoms. The invention also discloses an olefin polymerisation catalyst system, a method of producing an alpha-olefin polymer and a multi-step polymerisation method. |
|
Present invention relates to a method of carrying out polymerisation using enhanced catalyst compositions. The invention describes a method for synthesis of polyolefins, involving contact of ethylene in a reactor with at least one comonomer selected from a group consisting of C3-C8 alpha-olefin in the presence of a catalyst system on a carrier, wherein the catalyst system on a carrier contains at least one titanium compound, at least one magnesium compound, at least one compound which is an electron donor, at least one activating compound and at least one carrier material from silicon dioxide, wherein said at least one carrier material from silicon dioxide has average particle size between 20 and 35 micrometres, and average pore diametre ≥220 Å; in which at least one carrier material from silicon dioxide contains not more than 10% particles having size less than 12 micrometres and not more than 8% particles having size greater than 50 micrometres. Described also is a catalyst system on a carrier, containing at least one titanium compound, at least one magnesium compound, at least one compound which is an electron donor, at least one activating compound and at least one carrier material from silicon dioxide, wherein said at least one carrier material from silicon dioxide has average particle size between 20 and 35 micrometres, and average pore diametre ≥220 Å; where the said at least one carrier material from silicon dioxide has not more than 10% particles having size less than 12 micrometres and not more than 8% particles having size greater than 50 micrometres. |
Another patent 2551089.