Manufacture of homopolymers of 4-methylpentene-1

US3969335A · kind A · utility

Assignee

• BASF SE

Inventors

• Johann Nickl
• Hans Schick · Berlin, DE
• Heinz Mueller-Tamm

Key dates

• Filing date: Feb 6, 1975
• Grant date: Jul 13, 1976
• Expiry date: Feb 6, 1995

Classification

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

Abstract

Homopolymers of 4-methylpentene-1 are prepared by homopolymerization of 4-methylpentene-1 at a temperature above room temperature, in the presence of hydrogen and in contact with a Ziegler/Natta catalyst system. The polymerization is carried out at a relatively very high temperature and in the presence of an inert gas, the polymerization system being under a specific total pressure, while the partial pressures of the inert gas and the hydrogen have specific values. In this way, homopolymers having large crystalline fractions are obtained in high yields per unit of catalyst system per unit time.