CATALYST COMPOSITIONS AND PROCESS FOR PREPARING POLYOLEFINS

• Main Authors: LITTLE, IAN RAYMOND, MCNALLY, JOHN PAUL
• Format: Patent
• Language: English
• Published: 30.11.1996
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; THEIR RELEVANT APPARATUS; TRANSPORTING

CATALYST COMPOSITIONS COMPRISING BOTH METALLOCENE COMPLEXES HAVING POLYMERISABLE GROUPS AND POLYMERIZATION CATALYSTS EG ZIEGLER-NATTA MAY BE USED FOR THE PREPARATION OF POLYOLEFINS. THE CATALYST COMPOSITIONS MAY COMPRISE THE METALLOCENE COMPLEX IN THE FORM OF A POLYMER AND MAY SUITABLY BE SUPPORTED ON INORGANIC SUPPORTS. POLYMERS HAVING A WIDE RANGE OF MOLECULAR WEIGHTS AND COMONOMER DISTRIBUTIONS MAY BE PREPARED BY USE OF THE CATALYST COMPOSITIONS. PREFERRED METALLOCENE COMPLEXES ARE ZIRCONIUM COMPLEXES IN WHICH THE POLYMERISABLE GROUP IS VINYL.