Manufacture of electrically conductive polyolefin moldings, and their use

US4350652A · kind A · utility

Assignee

• BASF SE

Inventors

• Rainer Theysohn · Bischofswerda, DE
• Klaus Boehlke
• Erhard Seiler · Ludwigshafen, DE
• Martin Welz · Bad Dürkheim, DE

Key dates

• Filing date: Apr 16, 1981
• Grant date: Sep 21, 1982
• Expiry date: Apr 16, 2001

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2323/02
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for the preparation of finely divided polyolefin molding materials from 100 parts by weight of a polyolefin and from 0.01 to 30 parts by weight of an electrically conductive additive, with or without other additives, wherein the mixture of the finely divided polyolefin particles and the electrically conductive additives is brought to the crystallite melting point of the polyolefin by the heating effect of the mixing action, and is then brought to a temperature which is from 3.degree. to 40.degree. C. above the said crystallite melting point while being subjected to a defined mixing intensity, after which the mixture is either cooled within 120 seconds or is directly compression-molded.