Manufacture of homopolymers and copolymers of .alpha.-monoolefins

US4189557A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Klaerner · Battenberg, DE
• Klaus Bronstert · Eisenberg (Pfalz), DE
• Gerhard Staiger · Frankenthal (Pfalz), DE

Key dates

• Filing date: Apr 28, 1978
• Grant date: Feb 19, 1980
• Expiry date: Apr 28, 1998

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/907
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the manufacture of homopolymers and copolymers of .alpha.-monoolefins by polymerizing the monomer or monomers by means of a Ziegler-Natta catalyst comprising (I) a titanium trichloride component and (II) an aluminum-alkyl component, wherein the titanium trichloride component (I) employed is obtained by (1) in a first stage moistening a suitable conventional catalyst component, consisting entirely or substantially of titanium trichloride, with a hydrocarbon mixture comprising a liquid alkane hydrocarbon and a liquid benzene hydrocarbon and (2) in a second stage drying the catalyst component, moistened with the hydrocarbon mixture, under an inert gas, with constant mechanical mixing, within a certain period, at a temperature which is from 5.degree. to 50.degree. C. above the boiling point of the highest-boiling hydrocarbon present in the hydrocarbon mixture which has been used to moisten the component. Homopolymers and copolymers having particularly advantageous morphological properties can be manufactured by the process of the invention.