Manufacture of uniform polymers

US3954722A · kind A · utility

Assignee

• BASF SE

Inventors

• Adolf Echte · Ludwigshafen, DE
• Johann Zizlsperger
• Ernst Tetzlaff · Heidenheim, DE
• Rudi W. Reffert · Beindersheim, DE

Key dates

• Filing date: Aug 26, 1974
• Grant date: May 4, 1976
• Expiry date: Aug 26, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F2/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A continuous process for the polymerisation of olefinically unsaturated monomers in bulk or in solution in which at least a portion of the low-viscosity materials to be fed to the polymerization zone is thoroughly mixed with a portion of the high-viscosity contents of the polymerization zone in a mixing zone disposed upstream of the polymerization zone, which mixture is then continuously fed to the polymerization zone. The resulting polymers have a uniform composition and a narrow molecular weight distribution. They may be converted to shaped articles by thermoplastic methods.