Basf Aktiengesellschaft

Hans Willing

Erhard Seiler

Rainer Theysohn

Gerhard Zeitler

Frank Weiss

A process for the preparation of finely divided polyolefin molding materials from 100 parts by weight of polyolefin and from 1 to 30 parts by weight of a conductive carbon black, with or without other additives, wherein the mixture of polyolefin powder and carbon black is compounded, in a first stage, until the crystallite melting point of the polyolefin is reached, and is then brought, in a second stage, to a temperature which is from 3.degree. to 40.degree. C. above the said crystallite melting point, after which the mixture is discharged from the mixer within from 0.5 to 30 seconds and is cooled within 120 seconds.

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Duerkheim, Germany

Hans Willing