Ethylene copolymers and their use for the manufacture of films

US4311752A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Bernd Diedrich · Eschborn, DE
• Ludwig Bohm · Mainz, DE
• Olaf Heine · Königstein, DE

Key dates

• Filing date: Nov 13, 1979
• Grant date: Jan 19, 1982
• Expiry date: Nov 13, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/905
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Copolymers of ethylene and higher 1-olefins which are suitable for the manufacture of thin films, are preferably prepared in a two-step process, the first step yielding a polymer having a high molecular weight, the second step giving a polymer having a low molecular weight. The films obtained from these copolymers have improved mechanical properties as compared to films manufactured from known corresponding raw materials. The mechanical properties are furthermore uniform in longitudinal and in transverse direction.