Verfahren zur Herstellung von Äthylen-1-Buten-Copolymeren

Details

Veröffentlichungs-Nr.

EP4810530

Anmeldetag

18. März 2025

Veröffentlichung

23. September 2026

Rechtsraum

EP

IPC

C08F210/16, C08F4/659

Abstract

The invention concerns a solution polymerization process for producing an ethylene-1-butene copolymer, the process comprising the steps of a) feeding ethylene, 1-butene, a metallocene catalyst system and a solvent into a first reactor, b) polymerizing in the first reactor ethylene and 1-butene in the presence of the metallocene catalyst system and the solvent at a pressure of from 50 to 300 bar and a temperature of from 95 to 135 °C to form the ethylene-1-butene copolymer, wherein the metallocene catalyst system comprises, or consists of, (i) a metallocene complex of formula (I), <img class="EMIRef" id="35359059-d4ab-4a24-bcca-769fb6cff1c9-ia01" /> wherein M is Hafnium, R are the same or different from each other and can be a saturated linear or branched C<1> to C<10> alkyl, preferably all R are the same and are a linear or branched C<1> to C<3> alkyl, more preferably all R are a C<1> alkyl group, R<1> is an unsubstituted C<6> to C<10> aryl, preferably phenyl and R<2> is a C<4> to C<20> cycloalkyl group or a C<4> to C<6> alkenyl groups, X is a C<1> to C<6> alkyl, preferably methyl, and (ii) a cocatalyst. c) withdrawing the ethylene-1-butene copolymer from the first reactor, characterized in that the ethylene-1-butene copolymer has a melt flow rate MFR<2>, measured according to ISO1133 at 190 °C and a load of 2.16 kg, in the range of from 0.1 to 990 g/10 m in or in the range of from 47 to 990 g/10 min.

Anmelder

Firma

Borealis GmbH

Land

🇦🇹 Österreich

Fachgebiete