DUAL METALLOCENE CATALYST FOR PRODUCING FILM RESINS WITH GOOD MACHINE DIRECTION (MD) ELMENDORF TEAR STRENGTH Russian patent published in 2010 - IPC C08F210/16 C08F4/642 C08F10/00 C08F4/16 

FIELD: chemistry.

SUBSTANCE: invention relates to a catalyst composition for catalysis of (co)polymerisation of olefins, containing a first metallocene compound, a second metallocene compound, at least one chemically treated solid oxide and at least one organoaluminium compound, where a) the first metallocene compound has the following formula: (X¹)(X²)(X³)(X⁴)Zr, where (X¹) and (X²) independently represent monosubstituted cyclopentadienyl, monosubstituted indenyl, monosubstituted fluorenyl or their monosubstituted, partially saturated analogues; where each substitute on (X¹) and (X²) independently represents a straight or branched aliphatic group, where the aliphatic group is unsubstituted or substituted, where any of them has 1-20 carbon atoms; where (X³), (X⁴) and any substitute on the substituted aliphatic group on (X¹) and (X²) independently represent an aliphatic group, an aromatic group, a cyclic group, a combination of aliphatic and cyclic groups, an oxygen group, a sulphur group, a nitrogen group, a phosphorus group, an arsenic group, a carbon group, a silicon group, a germanium group, a tin group, a lead group, a boron group, an aluminium group, an inorganic group, an organometallic group or their substituted derivative, where each of them has 1-20 carbon atoms; halogenide; or hydrogen; b) the second metallocene compound has the following formula: (X⁵)(X⁶)(X⁷)(X⁸)M, where 1) M represents Zr; (X⁵) and (X⁶) independently represent substituted cyclopentadienyl, substituted indenyl, substituted fluorenyl or their substituted, partially saturated analogue; where at least one of (X⁵) and (X⁶) is at least disubstituted, and each substitute on (X⁵) and (X⁶) independently represents a straight or branched aliphatic group, where the aliphatic group is unsubtituted or substituted, where any of them has 1-20 carbon atoms; 2) M represents Zr; (X⁵) and (X⁶) independently represent cyclopentadienyl, indenyl, fluorenyl, their partially saturated analogue or their substituted analogue; and (X⁵) and (X⁶) are linked by a substituted or unsubstituted bridge group which has 3-5 adjacent ansa carbon atoms in the chain, one end of which is bonded to (X⁵) and the other to (X⁶); or 3) M represents Hf; (X⁵) and (X⁶) independently represent monosubstituted cyclopentadienyl, monosubstituted indenyl, monosubstituted fluorenyl or their monosubstituted, partially saturated analogue; and each substituted on (X⁵) and (X⁶) independently represents a straight or branched aliphatic group, where the aliphatic group is unsubstituted or substituted, where any of them has 1-20 carbon atoms; and where (X⁷), (X⁸), any substitute on (X⁵), any substitute on (X⁶), any substitute on the substituted aliphatic group on (X⁵) and (X⁶) and any substitute on the substituted bridge group which links (X⁵) and (X⁶) independently represent an aliphatic group, an aromatic group, a cyclic group, a combination of aliphatic and cyclic groups, an oxygen group, a sulphur group, a nitrogen group, a phosphorus group, an arsenic group, a carbon group, a silicon group, a germanium group, a tin group, a lead group, a boron group, an aluminium group, an inorganic group, an organometallic group or their substituted derivatives, where any of them has 1-20 carbon atoms; halogenide; or hydrogen; and c) the chemically treated solid oxide contains a solid oxide treated with an electron-acceptor anion, and d) the organialuminium compound has the following formula: Al(X⁹)_n(X¹⁰)_3-n, where (X⁹) represents hydrocarbyl with 1-20 carbon atoms; (X¹⁰) represents alkoxide or aryloxide with 1-20 carbon atoms, halogenide or hydride; and n equals a number from 1 to 3 inclusive. The invention also relates to methods of preparing a catalytic composition, a polymer or copolymer of ethylene obtained in the presence of the catalytic composition and use of the catalytic composition in polymerisation of olefins.

EFFECT: invention allows for producing polymers and copolymers of ethylene with lower MI, high melt strength and good MD tear properties.

41 cl, 11 ex, 14 tbl