Process for the preparation of copolymerisates of vinyl aromatic compounds in a stage using double screw extruders

US6048951A · kind A · utility

Assignee

• BASF SE

Inventors

• Josef Wunsch · Schifferstadt, DE
• Jurgen Hofmann · Spalt, DE
• Thomas Kessler · Schifferstadt, DE

Key dates

• Filing date: Jun 2, 1998
• Grant date: Apr 11, 2000
• Expiry date: Jun 2, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F212/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Process for preparing copolymers of aromatic vinyl compounds at -80 to 150.degree. C. in the presence of metallocene catalyst systems using a corotating, closely intermeshing twin-screw extruder for polymerization.