PROCESS FOR PRODUCING .alpha.-OLEFIN POLYMERS

• Main Authors: UWAI, TOSHIHIRO, HANARI, TOHRU, MIYAJIMA, MASAZUMI, KIKUTA, KAZUTSUNE, SATO, AKIHIRO
• Format: Patent
• Language: English; French
• Published: 02.08.1983
• Edition: 3
• 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

A process, for producing .alpha.-olefin polymers is provided which comprises: reacting an organoaluminum compound with an electron donor in a specified ratio in a solvent at a specified temperature to obtain a solid product (I); reacting solid product (I) with TiCl4 at a specified temperature in a specified ratio of A?/Ti and then removing a liquid portion from the resulting material followed by washing to obtain a solid product (II) having no free TiCl4: reacting solid product (II) with an electron donor and an electron acceptor in a specified ratio at a specified temperature to obtain a solid product (III); and polymerizing .alpha.-olefin(s) in the presence of a catalyst comprising a combination of solid product (III) with an organoaluminum compound. This process provides a catalyst having a high storing and thermal stability and a polymer having a uniform particle size.