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:
Jul. 13, 2021
Filed:
Dec. 20, 2017
Compagnie Generale Des Etablissements Michelin, Clermont-Ferrand, FR;
Charlotte Dire, Clermont-Ferrand, FR;
Marie-Hélène Dessendier, Clermont-Ferrand, FR;
COMPAGNIE GENERALE DES ETABLISSMENTS MICHELIN, Clermont-Ferrand, FR;
Abstract
A process for the continuous synthesis of a diene elastomer is provided. The synthesis is conducted by means of n reactors r1 to rn, considered to be continuous stirred-tank reactors, which are equipped with an internal stirring system. The reactors are arranged in series, n varying from 2 to 15, preferably from 2 to 9. The reactor r1 is fed by an input solution comprising a solvent, one or more monomer(s), an anionic polymerization initiator chosen from lithium amides and a polar agent. The conversion by weight Cin the first reactor is less than 70%, and the total conversion by weight Cat the outlet of the reactor rn is greater than or equal to 70%.