Process for the preparation of homopolymers and copolymers of .alpha.-monoolefins

US4260710A · kind A · utility

Assignee

• BASF SE

Inventors

• Gerhard Staiger · Frankenthal (Pfalz), DE
• James F. R. Jaggard · Ludwigshafen, DE
• Paul Schneider

Key dates

• Filing date: Sep 6, 1979
• Grant date: Apr 7, 1981
• Expiry date: Sep 6, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/906
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the preparation of homopolymers and copolymers of .alpha.-monoolefins by means of a Ziegler-Natta catalyst system comprising (1) a titanium halide of the formula EQU TiCl.sub.3.m AlCl.sub.3 where m is a number from 0 to 0.5, (2) an oxygen compound of the formula ##STR1## where R.sup.1 is hydrogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, R.sup.2 is C.sub.1 -C.sub.4 -alkyl and n is an integer from 0 to 3, and (3) an appropriate conventional aluminum-alkyl, the titanium halide (1) and the oxygen compound (2) having been milled together before use, wherein the catalyst system employed contains, as a further component (4), a phenolic compound of the formula ##STR2## where R.sup.3 is C.sub.1 -C.sub.6 -alkyl, R.sup.4 is hydrogen or C.sub.1 -C.sub.6 -alkyl, R.sup.5 is hydrogen or a saturated hydrocarbon radical of not more than 30 carbon atoms which may also contain not more than a total of 6 ether groups and/or ester groups, R.sup.6 is C.sub.2 -C.sub.24 -alkyl and o is an integer from 1 to 6.