Supported polymerisation catalysts
AssigneeIneos Europe AG
InventorsGrant Berent Jacobsen, Brian Stephen Kimberley, Sergio Mastroianni, Michael John Taylor
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Abstract
An improved method for the preparation of a supported polymerisation catalyst system comprises the combination of (i) a porous support (ii) a polymerisable monomer, (iii) a polymerisation catalyst, and (iv) a cocatalyst, characterised in that the polymerisable monomer is added to the porous support before addition of one or both of the polymerisation catalyst and the cocatalyst. The preferred polymerisation catalyst is a metallocene complex and the preferred porous support is silica. The resultant supported catalysts are stable over long periods of time. The supported catalyst are particularly suitable for use in the gas phase.
Claims26
A method for the preparation of a supported polymerisation catalyst system, said method comprising combining
- (i) a porous support,
- (ii) a polymerisable monomer,
- (iii) a metallocene complex having the formula:
- CnMXn
- wherein Cp is a single cyclopentadienyl or substituted cyclopentadienyl group optionally covalently bonded to M through a substituent, M is a Group IVB metal bound in a η5 bonding mode to the cyclopentadienyl or substituted cyclopentadienyl group, X each occurrence is hydride or a moiety selected from the group consisting of halo, alkyl, aryl, aryloxy, alkoxy, alkoxyalkyl. amidoalkyl, and siloxyalkyl having up to 20 non-hydrogen atoms and neutral Lewis base ligands having up to 20 non-hydrogen atoms or optionally one X together with Cp forms a metallocycle with M and n is dependent upon the valency of the metal, and
- (iv) a cocatalyst,
- wherein
- (i) to (iv) are combined in the order of
- (a)addition of the cocatalyst to the porous support,
- (b)addition of the polymerisable monomer, and
- (c)addition of the metallocene complex.
A method for the preparation of a supported polymerisation catalyst system, said method comprising combining
- (i) a porous support,
- (ii) a polymerisable monomer,
- (iii) a metallocene complex having the general formula:
- wherein:
- R′ each occurrence is independently selected from hydrogen, hydrocarbyl, silyl, germyl, halo, cyano, and combinations thereof, said R′ having up to 20 non-hydrogen atoms, and optionally, two R′ groups (where R′ is not hydrogen, halo or cyano) together form a divalent derivative thereof connected to adjacent positions of the cyclopentadienyl ring to form a fused ring structure;
- X is a neutral η4 bonded diene group having up to 30 non-hydrogen atoms, which forms a π-complex with M;
- Y is —O—, —S—, —NR*—, —PR*—,
- M is titanium or zirconium in the +2 formal oxidation state;
- Z* is SiR*2, CR*2, SiR*2, SIR*2, CR*2CR*2, CR*═CR*, CR*2SIR*2, or GeR*2,
- wherein:
- R* each occurrence is independently hydrogen, or a member selected from hydrocarbyl, silyl, halogenated alkyl, halogenated aryl, and combinations thereof, said
- R* having up to 10 non-hydrogen atoms, and optionally, two R* groups from Z* (when R* is not hydrogen), or an R* group from Z* and an R* group from Y form a ring system, and
- (iv) a cocatalyst,
- wherein
- (i) to (iv) are combined in the order of
- (a) addition of the cocatalyst to the porous support,
- (b) addition of the polymerisable monomer, and
- (c) addition of the metallocene complex.
Dependencies are inferred from the claim text.