Fluorinated zwitterionic cocatalyst activators for olefin polymerization
AssigneeExxonMobil Chemical Patents Inc.
InventorGeorge Rodriguez
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Abstract
Zwitterionic compositions of matter comprising cations [Ct]+ and anions connected together with substantially rigid fluorinated linking groups are described. These zwitterionic compositions serve as cocatalysts. They activate olefin polymerization catalysts, and can dissolve in aliphatic solvents. Synthesis and polymerization are illustrated.
Claims35
A catalyst system comprising a catalyst precursor that comprises a metal, and a cocatalyst compound that comprises:
- (a) a Group-13 anionic portion;
- (b) a cationic portion capable of activating the catalyst precursor;
- and
- (c) a spacing group, comprising two ends and a middle part wherein the middle part comprises a fluorinated ring moiety, connected to the Group-13 anionic portion on one end and connected to the cationic portion on the other end.
The catalyst system of claim 24 wherein the distal end of one R connects to the distal end of the other R to form a ring.
A polymerization cocatalyst prepared with 4-BrC4F4—NR2.
Dependencies are inferred from the claim text.