Huels Aktiengesellschaft

Wolfgang Holtrup

Bernhard-Peter Scholz

Heimo Bieringer

Herbert Schlueter

Klaus Walther

Martin Engler

The emulsion polymerization of free-radical-polymerizable monomers in the presence of a branched, poly(ethylene oxide) having a molecular weight of 4,000 to 19,000 and 1 to 250 mmol of the sum of the alkali metal and ammonium ions which are not bound to the emulsifier per liter of aqueous phase provides coarse, aqueous plastic dispersions. The process allows for the effective control of the particle size in the dispersion and yields carboxylated rubber dispersions which are suitable for the production of coating materials for carpets and paper.

Process for the preparation of coarse, aqueous plastic dispersions by

A suspension polyvinyl chloride is produced which is especially suited for processing by injection molding because it exhibits a greatly improved flowability. Polymerization takes place with an ascending temperature control at at least two different temperatures, a regulator being added to the polymerization mixture by a one-time addition at a conversion of .gtoreq.20% by weight and .ltoreq.70% by weight.

Growing community of inventors

Marl, Germany

Wolfgang Holtrup