Patent ID: 11952440
Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 18:
19. Process for the production of a polyethylene comprising polymerizing a reaction mixture comprising ethylene in the presence of a catalyst system and an antistatic agent according to formula I:, wherein R1, R2 and R3 stand for a moiety according to formula II or a hydrocarbon moiety having 1 to 20 carbon atoms, wherein each of R4, R5 and R6 is the same or different, and wherein each of R4, R5 and R6 is a hydrocarbon moiety having 1 to 10 carbon atoms, and wherein at least one of R1, R2 and R3 is a moiety according to formula II,
wherein the catalyst system is a metallocene-type catalyst system, and
the process is continuously operated by providing to a reactor a continuous supply of a reactant feed comprising ethylene, a continuous supply of the metallocene-type catalyst system, and a continuous supply of the antistatic agent, such that the molar ratio of the metallocene complex in the metallocene-type catalyst system to the antistatic agent is maintained in the range of ≥0.01 and ≤100, and wherein a product stream comprising the polyethylene produced in the polymerisation reactor is withdrawn continuously from the reactor.