Process for the preparation of a heterogeneous metallocene catalyst component
AssigneeHoechst Aktiengesellschaft
InventorsMartin Antberg, Ludwig Bohm, Jurgen Rohrmann
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Abstract
The invention relates to a process for the preparation of a heterogeneous metallocene catalyst component from a suitably substituted metallocene of the sub-group 4 of the Periodic Table of the Elements and from poly(methylhydrogensiloxane) under the concomitant action of a catalyst. The metallocene component and a suitable aluminoxane can be used as catalyst for the polymerization of 1-olefins, cyclic olefins, diolefins and cyclic diolefins.
Claims8
A process for the preparation of a heterogeneous metallocene catalyst component from a metallocene of the formula I ##STR9## or of the formula II ##STR10## wherein said metallocenes contain at least two olefinic functions, and in which
- M.sup.1 is titanium, zirconium or hafnium, and
- Cp denotes a cyclopentadienyl radical,
- R.sup.1 and R.sup.2 are identical or different and denote a hydrogen atom, a halogen atom, a C.sub.1 -C.sub.10 -alkyl group, a C.sub.1 -C.sub.10 -alkoxy group, a C.sub.7 -C.sub.20 -arylalkyl group, a C.sub.6 -C.sub.10 -aryl group or a C.sub.6 -C.sub.10 -aryloxy group,
- R.sup.1 and R.sup.2 may also be linked to one another and may form a metallocycle together with M.sup.1,
- R.sup.3 denotes a hydrogen atom, a halogen atom, a C.sub.1 -C.sub.10 -alkyl group, a C.sub.6 -C.sub.10 -aryl group, a C.sub.7 -C.sub.20 -arylalkyl group, a C.sub.1 -C.sub.10 -fluoroalkyl group or an organometallic radical,
- R.sup.4 and R.sup.5 are identical or different and denote a C.sub.2 -C.sub.10 -alkenyl group, a C.sub.2 -C.sub.12 -alkenylaryl group, a C.sub.2 -C.sub.10 -alkenoxy group, a C.sub.2 -C.sub.8 -alkenyl-C.sub.1 -C.sub.8 -dialkylsilyl group, a C.sub.2 -C.sub.8 -alkenyl-C.sub.6 -C.sub.10 -di-arylsilyl group or a C.sub.2 -C.sub.8 -alkenyl-C.sub.1 -C.sub.8 -alkyl-C.sub.6 -C.sub.10 -arylsilyl group,
- R.sup.6 and R.sup.7 are identical or different and denote a cyclopentadienyl, indenyl or fluorenyl radical, it being possible for the five-membered rings mentioned to form a sandwich structure together with M.sup.1,
- R.sup.8 and R.sup.9 are identical or different, are substituents of the five-membered rings R.sup.6 and R.sup.7 mentioned in the 3-position and denote a C.sub.2 -C.sub.10 -alkenyl group or an organometallic radical,
- R.sup.10 has the meaning shown in the formulae III-VII ##STR11## where M.sup.2 is silicon, germanium or tin and
- R.sup.11, R.sup.12, R.sup.13 and R.sup.14, are identical or different and denote a hydrogen atom, a halogen atom, a C.sub.1 -C.sub.10 -alkyl group, a C.sub.1 -C.sub.10 -fluoroalkyl group, a C.sub.6 -C.sub.10 -aryl group, a C.sub.6 -C.sub.10 -fluoroaryl-group, a C.sub.1 -C.sub.10 -alkoxy group, a C.sub.6 -C.sub.10 -aryloxy group or a C.sub.7 -C.sub.20 -arylalkyl group, R.sup.11 and R.sup.12, R.sup.13 and R.sup.14, R.sup.11 and R.sup.13 or R.sup.12 and R.sup.14 can form a ring system together with the atoms linking them,
- x is zero or 1,
- m and n are identical or different and denote a number from zero to 5, and
- a poly(methylhydrogensiloxane),
- which process is carried out at a temperature of 20.degree. C.-90.degree. C. and within 5 to 120 minutes using a hydrosilylation catalyst.
Dependencies are inferred from the claim text.