Process for preparing pulverulent ethylene polymers

US4446311A · kind A · utility

Assignee

• Ruhrchemie Aktiengesellschaft · DE

Inventors

• John Hobes · Dinslaken, DE
• Wolfgang Payer · Ulm, DE
• Detlef Deymann · Essen, DE

Key dates

• Filing date: Jun 14, 1982
• Grant date: May 1, 1984
• Expiry date: Jun 14, 2002

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2323/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for preparing pulverulent ethylene homopolymers or copolymers with a grain size of less than 200 .mu.m which comprises contacting coarse-particled ethylene homopolymers or copolymers in the form of a suspension with an aliphatic ketone containing 3 to 10 carbon atoms, heating the same with a mixture of said ketone up to a temperature above the softening point of the polymer and thereafter cooling the same.