Preparation of homopolymers of ethene and copolymers of ethene with higher.alpha.-monolefins using a Ziegler catalyst system

US4710552A · kind A · utility

Assignee

• BASF SE

Inventors

• Robert Bachl
• Volker Warzelhan · Bad Dürkheim, DE
• Guenther Schweier · Friedelsheim, DE
• Hans Gropper · Schifferstadt, DE
• Wolfgang Ball · Mannheim, DE

Key dates

• Filing date: Jun 18, 1986
• Grant date: Dec 1, 1987
• Expiry date: Jun 18, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/901
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Homopolymers and copolymers of ethene are prepared using a Ziegler catalyst system comprising (1) a transition metal catalyst component, (2) an organoaluminum catalyst component and (3) an organohalogen catalyst component, by a method in which the transition metal catalyst component (1) employed is a solid-phase product (VI) obtained by (1.1) first combining (1.1.1) an inorganic oxidic substrate (I), as the carrier, with (1.1.2) a solution (II) consisting of (IIa) a certain oxahydrocarbon and (IIb) a mixture of (IIb1) a vanadium trichloride/alcohol complex, (IIb2) a titanium trihalide or titanium trihalide/alcohol complex and, if required, (IIb3) a zirconium tetrahalide to form a suspension (III), evaporating down this suspension to form a solid-phase intermediate (IV), and (1.2) then (1.2.1) combining the solid-phase intermediate (IV) obtained from (1.1) with (1.2.2) a solution of an organoaluminum compound (V) to form a suspension, the resulting suspended solid-phase product (VI) being the transition metal catalyst component (1).