Catalyst system for the production of polyalkenamers

US3974094A · kind A · utility

Assignee

• Chemische Werke Huels Aktiengesellschaft · US

Inventors

• Roland Streck · Marl, DE
• Heinrich Weber · Recklinghausen, DE

Key dates

• Filing date: Nov 13, 1974
• Grant date: Aug 10, 1976
• Expiry date: Nov 13, 1994

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G61/08
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Polyalkenamers are produced by a ring-opening polymerization of cyclic olefins employing a catalyst system comprising (1) a tungsten or molybdenum compound; (2) an organoaluminum compound; (3) a vinylic chloride, bromide or iodide; and, optionally, (4) a compound containing a hydroxyl or sulfhydryl group; and conducting the polymerization in the presence of an ethylenically unsaturated halogenated hydrocarbon wherein one of the double bonded carbon atoms is substituted by chlorine, bromine or iodine or halogenated alkyl or aryl and at least one hydrogen atom.