Centre National De La Recherche Scientifique

Compagnie Generale Des Etablissements Michelin

Michelin Recherche Et Technique S.a.

Ecole Polytechnique

Francois Nief

Julien Thuilliez

Pascal Le Floch

Guillaume Cortial

The present invention relates to a novel catalytic system for polymerization, and more particularly for preparing conjugated diene polymers bearing a polar function at the chain end. This catalytic system is based on a metal salt of a rare-earth metal and, as alkylating agent, an organometallic compound based on a metal belonging to the 2column or the 13column of the Periodic Table, capable of transferring a polar function to the diene elastomer during the conjugated diene polymerization step. The novel catalytic system makes it possible to reduce the steps for synthesizing a chain-end functionalized elastomer, while ensuring optimal functionalization, advantageously close or equal to 100%.

Catalytic system for conjugated diene polymerisation, polymerisation method and functional polymer obtained

The present invention relates to a novel organometallic compound based on a divalent metal belonging to the 2column of the Periodic Table that can be used as an alkylating agent in a catalytic system based on a rare-earth metal. This novel compound corresponds to the formula: 

Organometallic compounds containing a metal belonging to the second column of the periodic table, and method for preparing same

Growing community of inventors

Antony, France

Francois Nief