The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 2026
Filed:
Nov. 19, 2021
Compagnie Generale Des Etablissements Michelin, Clermont-Ferrand, FR;
Centre National DE LA Recherche Scientifique, Paris Cedex, FR;
Ecole Superieure DE Chimie Physique Electronique DE Lyon, Villeurbanne Cedex, FR;
Université Claude Bernard Lyon 1, Villeurbanne Cedex, FR;
Robert Ngo, Clermont-Ferrand Cedex, FR;
Nicolas Baulu, Clermont-Ferrand Cedex, FR;
Christophe Boisson, Tramoyes, FR;
Franck D'agosto, Genas, FR;
François Jean-Baptiste-Dit-Dominique, Clermont-Ferrand Cedex, FR;
Julien Thuilliez, Clermont-Ferrand Cedex, FR;
COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand, FR;
CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE, Paris Cedex, FR;
ECOLE SUPERIEURE DE CHIMIE PHYSIQUE ELECTRONIQUE DE LYON, Villeurbanne Cedex, FR;
UNIVERSITÉ CLAUDE BERNARD LYON 1, Villeurbanne Cedex, FR;
Abstract
A catalytic system based on at least one rare-earth metallocene and an organomagnesium reagent as co-catalyst of formula R—(Mg—R)—Mg—Ris provided. According to the formula, Rcomprises a benzene nucleus substituted with the magnesium atom. One of the carbon atoms of the benzene nucleus ortho to the magnesium is substituted with a methyl, an ethyl or an isopropyl or forms a ring with the carbon atom which is its closest neighbour and which is meta to the magnesium. The other carbon atom of the benzene nucleus ortho to the magnesium is substituted with a methyl, an ethyl or an isopropyl. Ris a divalent aliphatic hydrocarbon-based chain, optionally interrupted with one or more oxygen or sulfur atoms or with one or more arylene groups. The m is a number greater than or equal to 1, preferably 1. The catalytic system allows the synthesis of dienic and/or ethylenic telechelic polymers.