Verfahren zur Herstellung eines Propylenpolymers

Details

Veröffentlichungs-Nr.

EP2813517

Aktenzeichen

EP13171308

Anmeldetag

10. Juni 2013

Veröffentlichung

26. Juni 2019

Erteilung

26. Juni 2019

Rechtsraum

EP

IPC

C08F2/00C08F4/00C08F10/06C08F210/06

Abstract

A process for the preparation of a propylene polymer by multistage polymerisation in the presence of a single site catalyst, said process comprising: (I) in a prepolymerisation step prepolymerising a single site catalyst in the presence of propylene and optionally at least one C2-10 alpha olefin comonomer and in the presence of hydrogen or in the absence of hydrogen; (II) in a slurry polymerisation step, polymerising propylene and optionally at least one C2-10 alpha olefin comonomer, with the prepolymerised catalyst of step (I) in the presence of hydrogen; and subsequently (III) in a gas polymerisation step polymerising propylene and optionally at least one C2-10 alpha olefin comonomer, in the presence of catalyst and polymer from step (II) and optionally in the presence of hydrogen so as to form a propylene homopolymer or copolymer; wherein the amount of hydrogen fed to the prepolymerisation step (I) is at most 15% of the total amount of hydrogen fed to steps (I) and (II) of the polymerisation.

Anmelder

Firma

Borealis AG

Land

🇦🇹 Österreich

Fachgebiete