|
Invention relates to a transition metal compound of chemical formula (1): [Chemical formula 1] In the present formula, M is Group 4 transition; Cp is a cyclopentadienyl ring bonded with M on a η5-type, where the cyclopentadienyl ring can further be substituted with (C1-C20)alkyl or (C6-C30)aryl; Ar is (C6-C14)arylene; R11 and R12 independently denote a hydrogen atom or (C1-C10)alkyl; n is an integer from 0 to 2; R is (C1-C10)alkyl or (C1-C10)alkoxy; and when n equals 2, individual substitutes R can be identical or different; X1 and X2 independently denotes a halogen atom, (C1-C20)alkyl, (C6-C30)aryl(C1-C20)alkyl or (C6-C30)aryloxy; alkyl, arylalkyl, alkoxy, aryloxy groups, radicals Rn, X1 and X2 and arylene groups Ar can be independently substituted with one or more substitutes selected from a group consisting of (C1-C20)alkyl, (C6-C30)aryl and (C1-C20)alkoxy. The invention also discloses a catalyst composition, a method of producing homopolymers of ethylene or copolymers of ethylene with α-olefin, a homopolymer of ethylene or a copolymer of ethylene with α-olefin. |
|
Method for high-temperature solution polymerisation of polyethylene Invention relates to a method for polymerisation of ethylene and one or more C3-30 α-olefins or diolefins in continuous solution polymerisation conditions to obtain a high-molecular weight polymer. The method involves carrying out polymerisation in the presence of a catalyst composition containing a cocatalyst and a zirconium or hafnium complex of a polyvalent aryloxyether of formula: , where M3 is Hf or Zr, preferably Zr; Ar4 has the formula: , where R11, in each case independently, denotes hydrogen, hydrocarbyl containing up to 50 atoms not counting hydrogen, under the condition that in at least one case, R11 is spatially volumetric; T4, in each case independently, denotes a C2-20 alkylene group; R21, in each case independently, denotes hydrogen, hydrocarbyl containing up to 50 atoms not counting hydrogen; R3, in each case independently, denotes hydrogen, hydrocarbyl containing up to 50 atoms; RD denotes a hydrocarbyl group containing up to 20 atoms not counting hydrogen. At least two R3 groups located on different arylene-oxy groups are spatially volumetric. The polymers have molecular-weight distribution (Mw/Mn) of less than or equal to 3.0. Content of comonomer gives the polymer density of 0.850-0.950 and the polymer has properties l10 and I2 which satisfy the relationship I10/l2≤10,32 (MI)-0.0814 for values of MI in the range of 0.01-50. A metal complex of a polyvalent aryloxyether is also disclosed. |
|
Catalyst system, production method thereof and polyolefins obtained based on said system Invention relates to a catalyst system for producing polyolefins. The catalyst system contains a halide complex of a group 4 metal with a polydentant organic ligand from (4R,5R)-2,2-R1,R2-α,α,α',α'- tetra(C6R3R4R5R6R7)-1,3-dioxolan-4,5-dimethanol derivatives, where R1 and R2 are groups, identical or different, which are selected from a group comprising substituted or unsubstituted C1-C20 linear or branched alkyl, C3-C20 cycloalkyl, C6-C20 aryl and C10-C20 condensed aromatic groups; R3-7-alkyl (C1-C5), aryl, fluorine, trifluoromethyl; or 2-(2-hydroxy-2,2-diphenylethylamino)-1,1-diphenylethanol and an organoaluminium compound. The system further contains at least one metal halide selected a group comprising lithium, sodium, magnesium, zinc, scandium and aluminium. Molar ratio of the halide complex of the group 4 metal, the metal halide selected a group comprising lithium, sodium, magnesium, zinc, scandium and aluminium and the organoaluminium compound is in the range of 1:0,1-500:10-5000, preferably, 1:1-300:100-1000. The invention also discloses a method of producing the catalyst system and a polyolefin. |
|
Improved polymerisation methods using metallocene catalysts, polymer products and use thereof Invention relates to an ethylene and alpha-olefin copolymer obtained by reacting ethylene, at least one alpha-olefin and a metallocene catalyst in at least one gas-phase reactor. The alpha-olefin is selected from a group consisting of hexene, octene and combination thereof. Said copolymer has: melt index (l2) from 0.1 to 100 dg/min; molecular weight distribution (MWD) from 1.5 to 5.0; T75-T25 greater than 20, where T25 is temperature at which 25% eluted polymer is obtained, and T75 is temperature at which 75% eluted polymer is obtained in a TREF experiment; M60/M90 is greater than 1, where M60 is molecular weight of the polymer fraction eluted at 60°C, and M90 is molecular weight of the polymer fraction eluted at 90°C, in a TREF-LS experiment; density D is equal to or less than 0.927 g/cm3. The ethylene and alpha-olefin copolymer has maximum melting point Tmax. second melting which satisfies the following relationship: Tmax. second melting > D*398-245. The metallocene catalyst is selected from a group consisting of: bis(n-propylcyclopentadienyl)hafnium Xn, bis(n-butylcyclopentadienyl)hafnium Xn, bis(n-pentylcyclopentadienyl)hafnium Xn, (n-propylcyclopentadienyl)(n-butylcyclopentadienyl)hafnium Xn, bis[(2-trimethylsilylethyl)cyclopentadienyl]hafnium Xn bis(trimethylsilylcyclopentadienyl)hafnium Xn, dimethylsilylbis(n-propylcyclopentadienyl)hafnium Xn, dimethylsilylbis(n-butylcyclopentadienyl)hafnium Xn bis(1-n-propyl-2-methylcyclopentadienyl)hafnium Xn and (n-propylcyclopentadienyl)(1-n-propyl-3-n-butylcyclopentadienyl)hafnium Xn, where X is selected from a group consisting of halogen ions, hydrides, C1-12 alkyl, C2-12 alkenyl, C6-16 aryl, C7-20 alkylaryl, C1-12 alkoxy, C6-16 aryloxy, C7-18 alkylaryloxy, C1-12 fluoroalkyl, C6-12 fluoroaryl, and C1-12 heteroatom-containing hydrocarbons and substituted derivatives thereof, and where n assumes values from 1 to 4. The invention also discloses a method of producing an ethylene and alpha-olefin copolymer and a film. |
|
Method of producing catalytic system for polymerisation of olefins Invention relates to production of catalytic system for polymerisation of olefins. Catalytic system s produced using catalytic system components activated via contact with aluminium organic compounds. Prior to said contact, aluminium organic compounds are subjected to microwave radiation with frequency of 0.3 to 20 GGz for 0.5-20 minutes. |
|
Polymerisation and oligomerization catalysts Polymerisation catalyst includes (1) compound of transition metal of formula A, and optionally (2) activating quantity of activator - Lewis acid; formula A, where Z represents five-member heterocyclic group, containing, at least, one carbon atom, at least, one nitrogen atom, and, at least, one other heteroatom, selected from nitrogen sulphur and oxygen, other atoms in ring being nitrogen or carbon atoms; M represents metal of groups 3-11 of periodic table or metal lantanide; E1 and E2 represent divalent groups, selected from (1) aliphatic hydrocarbon, (2) alicyclic hydrocarbon, (3) aromatic hydrocarbon, (4) alkyl-substituted aromatic hydrocarbon, (5) heterocyclic groups and (6) hetero-substituted derivatives of said groups from (1) to (5); D1 and D2 represent donor groups; X represents anion group; L represents neutral donor group; n=m=zero or one; y and z represent zero or integers. |
Another patent 2513201.