1,2-phenylene bridged 1-indenyl-2-indenyl metallocene complexes for olefin polymerisation

Abstract

The invention relates to a metallocene complexes according to formula (I), (I) wherein R1 and R2 are independently selected from H, an alkyl or an aryl group, wherein R3 is a C1-C10 alkyl group, wherein R′ is selected from H, an alkyl group, an aryl group and wherein different R′ substituents can be connected to form a ring structure and wherein B is a 1,2 phenylene bridging moiety, which can be optionally substituted, wherein Mt is selected from Ti, Zr and Hf, X is an anionic ligand, z is the number of X groups and equals the valence of Mt minus 2. The invention also relates to a catalyst comprising the reaction product of the metallocene complex and a cocatalyst. Further the invention relates to a (co)polymerisation process of olefinic monomers.

Description

[0001]The invention relates to substituted 1,2-phenylene bridged 1-indenyl 2-indenyl metallocene complexes, a catalyst comprising the substituted metallocene complex, a process for the preparation of olefin polymers in the presence of substituted metallocene complexes, the use of the olefin polymers for making articles and articles comprising an olefin polymer.[0002]Metallocene complexes together with a cocatalyst form catalysts that are widely used for olefin polymerisation. In general, the metallocene complexes are known to have only one active polymerisation center and are often referred to as single site catalysts or discrete catalysts to distinguish them from non-single site catalysts like for instance Ziegler-type catalysts. The presence of one active center is believed to result in polymers having a narrow molecular weight distribution (MWD) and narrow compositional distribution for copolymers of different olefins. An advantage of metallocene catalysts is their high activity ...

AI Technical Summary

Benefits of technology

The metallocene complex in this patent is a new type of catalyst that can create copolymers with high yields and strong 1-hexene reactivity. This catalyst can work with a cocatalyst and under specific polymerization conditions. This new catalyst has the benefits of traditional metallocene catalysts, such as high activity and well-defined structures, but also has the ability to produce copolymers with high levels of alpha-olenfin content. This makes it easier to create commercial products with specific properties.

Problems solved by technology

The combination of high comonomer reactivity as well as high molecular weight is a challenging target for developing commercially applicable metallocene catalysts.

These metallocene catalysts result in polymers having a low molecular weight.

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