CATALYST SYSTEMS WITH TWO HAFNOCENE CATALYST CONNECTIONS
Patent Information
- Application Number
- DE602019085786
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2018-06-15
- Filing Date
- 2019-05-29
- Publication Date
- 2026-06-17
- Estimated Expiration
- 2039-05-29
AI Technical Summary
Existing catalyst systems struggle to produce polyolefin compositions with novel combinations of comonomer content, internal unsaturation, and molecular weights without interfering with each other's polymerization processes, leading to reduced catalytic activity and fouling.
A dual catalyst system comprising a bridged hafnium metallocene compound, an unbridged hafnium metallocene compound, a support material, and an activator is used for olefin polymerization, allowing for the production of ethylene polymers with high molecular weight, increased comonomer incorporation, and controlled unsaturation.
The system achieves enhanced polymer properties such as high stiffness, toughness, and processability, with ethylene polymers having molecular weights of 150,000 g/mol or greater and internal unsaturation of 0.2 or greater per 1,000 carbons, while maintaining efficient polymerization activity.