Catalytic system comprising a metallocene for the synthesis of polyethylene and ethylene-1,3-diene copolymer.
The introduction of a specific dialkylmagnesium co-catalyst in the rare earth metallocene system stabilizes the Mg/Nd molar ratio, addressing impurity sensitivity and enhancing control over polymer molar mass in ethylene and 1,3-diene polymerization.
FR3160409A1Active Publication Date: 2025-09-26MICHELIN & CO (CIE GEN DES ESTAB MICHELIN)
-1 Cites 0 Cited by
Patent Information
- Application Number
- FR2024002818
- Authority / Receiving Office
- FR · FR
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2044-03-21
Abstract
The invention relates to a catalytic system based at least on a neodymium borohydride, a co-catalyst which is a dialkylmagnesium of formula RB-Mg-RL in which RB is a secondary alkyl of formula R2CH and RL is a primary alkyl of formula RCH2, the Rs, identical or different, being alkyls. The catalytic system meets the objective of better control of the macrostructure in a process for the polymerization of ethylene or a monomer mixture containing ethylene and a 1,3-diene.
Need to check novelty before this filing date? Find Prior Art