Patents by Inventor Nathalie Peresleni Rivet

Nathalie Peresleni Rivet 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).

  • Two-step process for the preparation of (co) polychloroprene
    Patent number: 6034173
    Abstract: The present invention relates to the preparation of (co)polychloroprene latex in water emulsion, in the presence of an emulsifying system which comprises a first step (A) wherein a fraction f.sub.1 of monomers is used together with an emulsifying system which comprises a non-carboxylic ionic emulsifying agent (Ea1), a non-ionic emulsifying agent with a low HLB (Eb1) and a non-ionic emulsifying agent with a high HLB (Eb2), and a second step (B) wherein the reaction medium of step (A) is fed with the remaining fraction f.sub.2 of (co)monomers and the remaining emulsifying system.
    Type: Grant
    Filed: February 23, 1996
    Date of Patent: March 7, 2000
    Assignee: Enichem Elastomeres France S.A.
    Inventor: Nathalie Peresleni Rivet
  • Process for preparing (co)polychloroprene rubber
    Patent number: 5767214
    Abstract: Process for preparing (co)polychloroprene rubber, comprising:a first step (a) in which a portion of a polymerizable composition is partially polymerized according to a batchwise process,a second step (b) in which the residual polymerizable composition is sequentially fed to the reaction mixture coming from the step (a),a possible third step (c) in which the reaction mixture coming from the step (b) is polymerized up to the desired conversion rate.
    Type: Grant
    Filed: July 16, 1997
    Date of Patent: June 16, 1998
    Assignee: Enichem Elastomers France S.A.
    Inventors: Nathalie Peresleni Rivet, Fran.cedilla.ois Sauterey