Post-metallocene polyolefin catalyst compounds

Post-metallocene polyolefin catalyst compounds, particularly those with amine-bisphenolate ligands, address the challenge of achieving high molecular weight and comonomer incorporation in olefin polymerization, resulting in enhanced polymerization activity and process efficiency.

WO2025114173A1PCT designated stage expired Publication Date: 2025-06-05SABIC GLOBAL TECHNOLOGIES BV
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Patent Information

Application Number
PCT/EP2024/083369
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-11-27
Filing Date
2024-11-23
Publication Date
2025-06-05

AI Technical Summary

Technical Problem

Existing catalyst systems for olefin polymerization struggle to achieve high molecular weight and broad molecular weight distribution while maintaining high comonomer incorporation and polymerization activity.

Method used

The use of post-metallocene polyolefin catalyst compounds, specifically transition metal compounds containing amine-bisphenolate ligands, which allow for high comonomer incorporation and high molecular weight production in olefin polymerization.

Benefits of technology

These catalyst compounds enable the production of polymers with high molecular weight, broad molecular weight distribution, and high comonomer incorporation, thereby enhancing polymerization activity and process efficiency.

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Abstract

The present invention relates to a compound according to formula (1): wherein • M is a metal atom selected from Hf, Ti and Zr; • X is a halogen, a C1-C4 alkyl moiety, or a benzyl moiety; • R1 is a C1-C4 alkyl moiety; • each R2 and R3 is individually selected from hydrogen, a C1-C4 alkyl, methoxy, phenyl, benzyl, 2-phenylpropyl, 2,2'-diphenyl ethyl, 2,4,6-trimethylphenyl, 3,5- dimethylphenyl, 3,5-di-t-butyl-phenyl, 9 / 7-carbazol-9-yl, 9-methyl-9 / 7-fluoren-9-yl, and adamantyl; • R4 is a C1-C5 alkyl moiety, preferably R4 is selected from ethyl, propyl, n-butyl, isobutyl and isopentyl; wherein at least one R3 moiety is a methoxy moiety. Such compound allows for use as catalyst in olefin polymerisation at high degree of incorporation of desired comonomers in copolymerisation reaction of olefins, as well as high molecular weight, and broad molecular weight distribution, at particular high polymerisation activity.
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Citation Information

Patent Citations

  • Post-metallocene compounds

    WO2021213836A1

  • Process for preparing polyalpha-olefins

    WO2023017081A1

  • Solution process for production of functionalized polyolefins

    WO2023088853A1