Substituted metallocene catalysts

A metallocene catalyst and catalyst technology, applied in the direction of metallocene, organic chemistry, chemical instruments and methods, etc., can solve the problem of no cyclic bridging group
CN105377906AInactive Publication Date: 2016-03-02EXXONMOBIL CHEM PAT INC
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
EXXONMOBIL CHEM PAT INC
Publication Date
2016-03-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention relates to novel bridged alpha hafnium transition metal metallocene catalyst compounds having two indenyl ligands substituted at the 4 positions with a C1 to C10 alkyl, wherein the 3 positions are hydrogen (assuming the bridge position is counted as the one position) and the bridging atom is carbon or silicon which is incorporated into a cyclic group comprising 3, 4, 5, or 6 silicon and / or carbon atoms that make up the cyclic ring.
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Description

[0001] priority

[0002] This application claims the benefit of and priority to USSN 61 / 847,442, filed July 17, 2013. field of invention

[0003] The present invention relates to novel bridged hafnium metallocene compounds comprising an indenyl ligand substituted in the 4-position. Background of the invention

[0004] Olefin polymerization catalysts are of great utility in industry. There is therefore interest in finding new catalyst systems which increase the commercial availability of catalysts and enable the production of polymers with improved properties.

[0005] Catalysts for olefin polymerization are usually based on metallocenes as catalyst precursors, which are activated with the help of aluminoxanes or activators containing non-coordinating anions.

[0006] Useful metallocene catalysts are based on bis-indenyl transition metal compounds. In particular, bridged bis 2-substituted indenyl transition metal compounds and bridged bis 2,4-disubstituted indenyl transiti...

Claims

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