POLYMERIZATION PROCESS

• Main Authors: DOYLE, MICHAEL, JOHN, TERLOUW, WILLEM
• Format: Patent
• Language: English; French; German
• Published: 21.12.1994
• Edition: 5
• 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

Le procédé de polymérisation de l'éthylène et/ou d'une ou de plusieurs alpha-oléfines consiste à mettre en contact l'éthylène et/ou la/les alpha-oléfines avec un catalyseur comprenant un premier composant qui est un composé bis(cyclopentadiényl) - métal du groupe IVA contenant un substituant capable de réagir avec un cation, et un second composant qui est un composé ayant un anion volumineux contenant un ou plusieurs atomes de bore et qui est peu susceptible de former des complexes de coordination dans les conditions de réaction et un cation. Dans ce procédé, on ajoute un supplément du premier composant. A process for the polymerization of ethylene and/or one or more alpha-olefins comprising contacting ethylene, and/or the alpha-olefin(s) with a catalyst comprising a first component which is a bis(cyclopentadienyl) Group IVA metal compound containing a substituent capable of reacting with a cation, and a second component which is a compound having a bulky anion containing one or more boron atoms and which is substantially non-coordinating under the reaction conditions and a cation, in which process additional first component is added.