High molecular weight copolymers of propylene and olefins having 2 or 4 to 32 carbon atoms

US6057408A · kind A · utility

Assignee

• Targor GmbH · DE

Inventors

• Andreas Winter · Königstein, DE
• Frank Kuber · Oberursel, DE
• Bernd Bachmann · Eppstein, DE

Key dates

• Filing date: Apr 13, 1998
• Grant date: May 2, 2000
• Expiry date: Apr 13, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S526/943
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A copolymer having from 80 to 40% by weight of propylene units, based on the total polymer, and from 20 to 60% by weight of at least one comonomer, based on the total polymer. The comonomer units are prepared from ethylene or olefins having at least 4 carbon atoms and the formula R.sup.a --CH.dbd.CH--R.sup.b, where R.sup.a and R.sup.b are identical or different and are each a hydrogen atom or an alkyl radical having from 1 to 15 carbon atoms, or R.sup.a and R.sup.b, together with the carbon atoms connecting them, form a ring having 4 to 12 carbon atoms. The copolymer has a viscosity number of greater than 200 cm.sup.3 /g.