Basf Aktiengesellschaft

Frank Weiss

Peter Horn

Erhard Seiler

Werner Fliege

Rainer Theysohn

Gerhard Zeitler

Bernd Meissner

Gernot Teege

Hans Willing

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.

Preparation of finely divided polyolefin molding materials containing

New bis-[4-(m,m'-di-tert.-butyl-p-hydroxyphenyl)-butyl-(2)] dicarboxylic acid esters which are starting materials for the manufacture of dyes, pesticides and additives for plastics, especially stabilizers for polyolefins and polyamides, and are themselves stabilizers, aging retardants or antioxidants for organic products.

Bis-[4-(m,m'-di-tert.-butyl-p-hydroxyphenyl)-butyl-(2)]dicarboxylic acid

Growing community of inventors

Mannheim, Germany

Frank Weiss