POLYMERIZATION CATALYST

• Main Authors: PANNELL, Richard, B, CANN, Kevin, J, CAO, Phuong, A, MARIOTT, Wesley, R, HARI, Abarajith, S, HUSSEIN, F., David, LESTER, C., Dale, GOODE, Mark, G, MOORHOUSE, John, H, SAVATSKY, Bruce, J, ZILKER, Daniel, P
• Format: Patent
• Language: English; French; German
• Published: 09.08.2023
• 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

The invention relates to a polymerization catalyst for forming a polyethylene copolymer, comprising:a plurality of silica particles;a metallocene catalyst supported on the plurality of silica particles; andan activator supported on the plurality of silica particles;wherein the polymerization catalyst has a particle size distribution wherein about 10 % of the particles have a size less than about 17 to about 23 micrometers, about 50 % of the particles have a size less than about 40 to about 45 micrometers, and about 90 % of the particles have a size less than about 72 to about 77 micrometers, and wherein:the polymerization catalyst has a melt flow ratio response at about 77 °C of about 26; andthe polymerization catalyst has a melt flow ratio response at about 75 °C of about 28.