Unsaturated hydrocarbons polymerization catalysts containing transition metal complexes and Bronsted acids

USRE29504E · kind E · reissue

Assignee

• Institut Francais du Petrole des Carburants et Lubrifiants · FR

Inventors

• Francois Dawans · Bougival, FR
• Philippe Teyssie · Flémalle, BE

Key dates

• Filing date: Sep 22, 1970
• Grant date: Dec 27, 1977
• Expiry date: Sep 22, 1990

Classification

• Technology area (CPC —): General

Abstract

Catalysts compositions and methods for polymerizing conjugated diolefins comprising PA1 (a) A complex of a transition metal of Groups IV through VIII of Mendeleev's Periodic Table as a nuclear atom and unsaturated hydrocarbon having at least one pair of .pi. electrons as ligand, and PA1 (b) A Bronsted acid. Preferred embodiments include a catalyst resulting from a pre-treatment of (a) with a conjugated diolefin and the polymerization process incorporating the pretreated catalyst.