Process for producing branched polyolefins
By using a specific catalyst and chain transfer agent system in a single reactor, ethylene is brought into contact with the comonomer at high temperature to form a branched polymer with a high I10/I2 value and a high vinyl content, thus solving the problem of difficult LCB formation in olefin polymerization and improving the processing performance and safety of the polymer.
Patent Information
- Application Number
- CN202480015450.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2023-03-28
- Filing Date
- 2024-02-28
- Publication Date
- 2025-10-17
AI Technical Summary
Existing technologies have difficulty in effectively forming long-chain branches (LCBs) in olefin coordination polymerization, resulting in poor performance of olefin-based polymers during processing. In addition, the use of α,ω-diene as a branching agent poses gelation risks and supply limitations.
In a single reactor, ethylene monomer is contacted with a C3-C8 α-olefin comonomer using a single polymerization catalyst, a cocatalyst, an alkyl aluminum chain transfer agent, and an alkyl zinc chain transfer agent at a temperature of 160°C to 250°C to form a branched polymer having a high I10/I2 value and a high vinyl content.
The efficient formation of long-chain branching in olefin polymers is achieved, the melt strength and processing performance of the polymer are improved, the risk of gelation is reduced, and the supply limitation of α,ω-diene is avoided.