Process for preparing polyolefins, polydienes and copolymers thereof

US4980431A · kind A · utility

Assignee

• Studiengesellschaft Kohle gGmbH · DE

Inventors

• Gerhard Fink · Neheim, DE
• Eberhard Kinkelin · Chur, CH

Key dates

• Filing date: May 8, 1987
• Grant date: Dec 25, 1990
• Expiry date: May 8, 2007

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F36/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the preparation of polyolefins, polydienes and copolymers thereof by polymerization in solvents, liquid monomers or in the gaseous phase at a temperature between -20.degree. C. and 150.degree. C. using magnesium hydride, a halogen-containing transition metal compound of Group IV and an aluminium alkyl compound, characterized in that the polymerization is carried out in the presence of a catalyst system consists of PA1 (a) a magnesium compound having the general formula EQU MgH.sub.x PA1 wherein x is a number between 1 and 2, and more specifically 2; (b) a compound of a transition metal of Group IV having the general formula EQU MeHal.sub.4 PA1 wherein Me is a transition metal, more specifically titanium, and Hal is a halogen, more specifically chlorine; and (c) an aluminium alkyl compound having the general formula EQU AlR.sub.n Hal.sub.(3-n) PA1 wherein R is a C.sub.1 -C.sub.6 alkyl residue, more specifically ethyl, Hal is a halogen, more specifically chlorine, and n is a number of from 1 to 3, and preferably 3.