| 摘要 |
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 |
