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. 22, 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 ESTABLISSEMENTS MICHELIN, Clermont-Ferrand, FR;
CENTRE NATIONAL DE LA RÈCHERCHE SCIENTIFIQUE, Paris Cedex, FR;
ECOLE SUPÈRIEURE DE CHIMIE PHYSIQUE ELECTRONIQUE DE LYON, Villeurbanne Cedex, FR;
UNIVERSITÈ CLAUDE BERNARD LYON 1, Villeurbanne Cedex, FR;
Abstract
A process for preparing a multiblock polymer by statistical copolymerization of a mixture containing ethylene and a 1,3-diene and subsequent polymerization of ethylene in the presence of a rare-earth metallocene and an organomagnesium reagent R—(Mg—R)—Mg—Ror X—Mg—R—Mg—X is provided. According to the formula, Ris a divalent aliphatic hydrocarbon-based chain optionally interrupted with one or more oxygen or sulfur atoms or arylene groups, Rcomprises a benzene nucleus substituted with the Mg atom, one of the carbon atoms of the benzene nucleus ortho to the Mg 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 Mg. The other carbon atom of the benzene nucleus ortho to the Mg is substituted with a methyl, ethyl or isopropyl, X being a halogen atom, m being greater than or equal to 1.