NEW CATALYST SYSTEM FOR PRODUCING POLYETHYLENE COPOLYMERS IN A HIGH TEMPERATURE SOLUTION POLYMERIZATION PROCESS

• Main Authors: FAIT, Anna, AJELLAL, Noureddine, IZMER, Vyatcheslav V, KONONOVICH, Dmitry S, VOSKOBOYNIKOV, Alexander Z, SCIARONE, Timo, SABLONG, Rafael, RESCONI, Luigi
• Format: Patent
• Language: English; French; German
• Published: 23.10.2019
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP

Catalyst system for producing ethylene copolymers in a high temperature solution process, the catalyst system comprising(i) a metallocene complex of formula (I)M is Hf or a mixture with Zr, provided that more than 50% by moles of the complex of Formula I has M=HfX is a sigma ligandR are the same or different from each other and can be saturated linear or branched C1-C10 alkyl, C5-C10 aryl, C6-C20 alkylaryl or C6-C20 arylalkyl groups, which can optionally contain up to 2 heteroatoms or silicon atomsR1 is a C6-C20-aryl, which can be unsubstituted or substituted by one or up to 5 linear or branched C1-C10 alkyl group(s)R2 is a saturated linear or cyclic C3-C20 alkyl group or a branched CR3R4R5 group, wherein R3 is hydrogen or an C1-C20 alkyl group and R4 and R5 are the same or are different and can be an C1-C20 alkyl group and(ii) a boron containing cocatalyst.