Hoechst Aktiengesellschaft

Clariant Corporation

Basell Polyolefine Gmbh

Wilhelm Zoller

Matthias Krull

Werner Reimann

Gerhard Bettermann

Wolfgang Payer

John V Hobes

Heinz Dieter B&uuml;hnen

Heinz D Buhnen

Herbert Mercamp

Heinz Beckemeier

Di Heinz Dieter Bühnen

Heinz-Dieter Buhnen

Process for the preparation of ethylene copolymers, and their use as additives to mineral oil and mineral oil distillates. The invention relates to a process for the preparation of terpolymers of ethylene and at least 2 further olefinically unsaturated compounds by polymerization in a tubular reactor fitted with at least one side branch, wherein the fresh monomer components, which are introduced into the tubular reactor via the reactor inlet (the primary stream) or via the side branch or side branches (secondary stream or secondary streams), in each of the streams contain ethylene and at most one further olefinically unsaturated compound.

Process for the preparation of ethylene copolymers, and their use as additives to mineral oil and mineral oil distillates

The invention relates to a process for preparing ethylene homopolymers and ethylene copolymers in a tube reactor at pressures above 1000 bar and temperatures in the range from 120 to 400&#xb0; C. by free-radical addition polymerization, in which first small amounts of free-radical chain initiator are supplied to a streaming flow medium comprising ethylene, molar mass regulator, and, if desired, polyethylene, after which the polymerization takes place. The invention takes place at a pressure in the range from 2000 to 3500 bar and comprises reaction mixture within the tube reactor passing through a temperature profile in the range from 100 to 350&#xb0; C.

Method for producing ethylene homopolymers and copolymers by means of radical high pressure polymerization

The invention relates to a process for the preparation of terpolymers of ethylene and at least 2 further olefinically unsaturated compounds by polymerization in a tubular reactor fitted with at least one side branch, wherein the fresh monomer components, which are introduced into the tubular reactor via the reactor inlet (the primary stream) or via the side branch or side branches (secondary stream or secondary streams), in each of the streams contain ethylene and at most one further olefinically unsaturated compound.

Copolymers of ethylene, a vinyl ester of a tertiary saturated monocarboxylic acid and optionally a further monomer, and a process for making them. The copolymers are suitable for producing films of high mechanical strength and excellent optical properties.

Copolymers of ethylene

Separation of volatile components from the polymer melts formed during the homopolymerization of ethylene or the copolymerization of ethylene with other copolymerizable compounds at elevated pressures and elevated temperatures by countercurrent treatment with ethylene. Superior separations are obtained by the process.

Process for separating volatile components from reaction mixtures

Copolymers consisting of 95 to 50 weight percent of ethylene and 5 to 50 weight percent of methoxyacetic acid vinyl ester and having a molecular mass from 500 to 10,000 g.times.mole.sup.-1. Methods for preparation and use are also disclosed. The copolymers are used as flow improvers for mineral oil distillates, in particular mineral oil middle distillates.

Copolymers of ethylene and methoxyacetic acid vinyl ester

Copolymers consisting of 95 to 50 weight percent of ethylene and 5 to 50 weight percent of methoxyacetic acid vinyl ester and having a molecular mass from 500 to 10,000 g.times.mole .sup.-1. Methods for preparation and use are also disclosed. The copolymers are used as flow improvers for mineral oil distillates, in particular mineral oil middle distillates.

Growing community of inventors

Oberhausen, Germany

Wilhelm Zoller