Solution-mediated polymerization of ethylene using the Ziegler-Natta catalyst and a hydrogenation catalyst.

TH122591BActive Publication Date: 2026-07-03DOW GLOBAL TECHNOLOGIES LLC
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Patent Information

Authority / Receiving Office
TH · TH
Patent Type
Patents
Current Assignee / Owner
DOW GLOBAL TECHNOLOGIES LLC
Filing Date
2020-07-30
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Current catalyst systems struggle to produce high molecular weight polymers at high temperatures (120 °C to 250 °C) with high efficiency and reactivity, limiting the production of polymers with molecular weights greater than 100,000 g/mol.

Method used

A catalyst system comprising a non-hydrogen-generating post-metallocene procatalyst, a co-catalyst, and a hydrogenation procatalyst with specific formulas such as Cp2TiX2 or Cp2TiXnTiCp2, where Cp is cyclopentadienyl and X is a halogen or hydrocarbon atom, is used for polymerizing ethylene in solution processes, allowing for high molecular weight polymer production.

Benefits of technology

The catalyst system effectively produces polymers with molecular weights exceeding 100,000 g/mol at elevated temperatures, enhancing polymerization efficiency and reactivity, and preventing chain termination, thereby increasing the molecular weight of the polymers.

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Abstract

DEPCT65 The process of polymerizing olefin monomers and catalytic systems. Catalysts include non-hydrogenating postmetallocene procatalyzers, cocatalyzers, and A procatalyst for hydrogenation with the formula Cp2TiXnTiCp2 or Cp2TiXn, where each Cp is... Cyclopentadienyl replaced by at least one (C1-C10) alkyl, each X being a type Monoions or neutrals independently of each other, where each X is a (C1-C40) hydrocarbon. (C1-C40)heterohydrocarbons, (C1-C40)hydrocarbils, (C1-C40)heterohydrocarbils or Halogen atoms are independent of each other and n is either 1 or 2. -----------------------------------------------------------
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