Patents by Inventor Rokhiyatou SAID-DIATTA

Rokhiyatou SAID-DIATTA has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210198386
    Abstract: A process for preparing a functionalized polybutadiene is provided. The process comprises the following steps: a) homopolymerising butadiene with a catalytic system based on at least one preforming conjugated diene, a salt of one or more rare earth metals of an organic phosphoric acid, an aluminium-containing alkylating agent, an alkylaluminium halide; b) adding a polyfunctional compound to the pseudo-living elastomer formed in step (a); and c) adding a functionalizing agent to the mixture formed in step (b). The total molar amount of aluminium in the polymerization medium is such that the (aluminium/rare earth salt) molar ratio has a value between 1 and 5 and the polymerization is carried out at a temperature between 40° C. and 90° C. A functionalized polybutadiene that can be obtained by the process, and a rubber composition containing the functionalized polybutadiene is also provided.
    Type: Application
    Filed: May 23, 2019
    Publication date: July 1, 2021
    Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventors: Florent VALUTIER, Gaël COURBES, Rokhiyatou SAID-DIATTA
  • Publication number: 20210102022
    Abstract: A process for the preparation of a diene elastomer modified by a 1,3-dipolar compound is provided. The process includes reactive extrusion of a mixture of a diene elastomer and of a 1,3-dipolar compound in a twin-screw extruder at an extrusion temperature of greater than 100° C. Such a process is reproducible and makes possible good control of the grafting reaction.
    Type: Application
    Filed: December 19, 2017
    Publication date: April 8, 2021
    Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventor: Rokhiyatou SAID-DIATTA
  • Publication number: 20190315888
    Abstract: A process for the preparation of a diene elastomer modified by a 1,3-dipolar compound is provided. The process comprises a thermomechanical kneading of a mixture of a diene elastomer and of a 1,3-dipolar compound in an internal mixer in order to form a modified diene elastomer, followed by an extrusion of the modified diene elastomer.
    Type: Application
    Filed: December 19, 2017
    Publication date: October 17, 2019
    Applicant: COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN
    Inventor: Rokhiyatou SAID-DIATTA