Preparation of homopolymers of ethylene or copolymers of ethylene

US5414064A · kind A · utility

Assignee

• BASF SE

Inventors

• Martin Lux · Schifferstadt, DE
• Guido Funk · Worms, DE
• Roland Saive · Ludwigshafen, DE
• Hans-Helmut Goertz · Ludwigshafen, DE
• Rainer Konrad · Putlitz, DE

Key dates

• Filing date: Jul 14, 1994
• Grant date: May 9, 1995
• Expiry date: Jul 14, 2014

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/904
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Homopolymers of ethylene or copolymers of ethylene with minor amounts of other C.sub.3 -C.sub.12 -alk-1-enes are prepared by catalytic polymerization in a suspension or in the gas phase in the presence of an antistatic agent at from 50 to 120.degree. C. and from 5 to 50 bar by a process in which the antistatic agent used is a mixture of the following substances: a) a metal salt of medialanic acid of the formula (I) ##STR1## b) a metal salt of an anthranilic acid of the general formula (II) ##STR2## where the organic radical R.sup.1 is either EQU .alpha.)--CO--(CH.sub.2).sub.x --CH.sub.3 (II.alpha.) or EQU .beta.)--CO--(CH.sub.2).sub.y --CH.dbd.CH--(CH.sub.2).sub.z --CH.sub.3(III.beta.) and x, y and z are each an integer and are from 6 to 18 for x, from 1 to 16 for y, from 1 to 16 for z and from 4 to 17 for y+z, and c) a polyamine obtainable by reacting epichlorohydrin and an aliphatic primary monoamine or an N-alkylalkylenediamine of the general formula (IV) EQU R.sup.2 NH--R.sup.3 --NH.sub.2 (IV), where PA0 R.sup.2 is C.sub.8 -C.sub.24 -alkyl and PA0 R.sup.3 is C.sub.2 -C.sub.6 -alkylene.