Patents by Inventor Benoit Ernst

Benoit Ernst 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).

  • Bipopulated latex of polymers based on vinyl chloride, processes for the production thereof and application thereof in plastisols exhibiting improved rheology
    Patent number: 6297316
    Abstract: The present invention relates to a latex containing two populations of particles of polymers based on vinyl chloride. Other subjects of the present invention are processes for producing this latex and its use in the manufacture of fluid plastisols which are stable on storage.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: October 2, 2001
    Assignee: Elf Atochem S.A.
    Inventors: Philippe Espiard, Richard Peres, Benoit Ernst
  • Bipopulated latex based on vinyl chloride polymers having a high population level of fine particles, processes for the manufacture thereof and applications thereof
    Patent number: 6245848
    Abstract: The present invention relates to a latex containing two populations of particles of polymers based on vinyl chloride, respectively exhibiting mean diameters of between 0.9 and 1.3 &mgr;m and between 0.15 and 0.3 &mgr;m, in proportions such that the ratio by weight of the population with the lesser mean diameter to that with the greater mean diameter is between 0.4 and 0.7. Other subjects of the present invention are processes for the manufacture of the said latex and its application in fluid plastisols and foams of very good cellular quality.
    Type: Grant
    Filed: August 27, 1997
    Date of Patent: June 12, 2001
    Assignee: Elf Atochem S.A.
    Inventors: Philippe Espiard, Richard Peres, Benoit Ernst
  • Cellulose microfibril-reinforced polymers and their applications
    Patent number: 6103790
    Abstract: Cellulose microfibril reinforced polyers, corresponding latices, powders, films and rods, and uses thereof. Polymer/cellulose composites are prepared using individualized cellulose microfibrils with a high form factor, e.g., tunicin microfibrils, as the reinforcement. For this purpose, reinforced latices consisting of a polymer latex and a stable aqueous suspension of said microfibrils are used. Said polymers have a wide variety of uses, particularly in paints and nanocomposites.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: August 15, 2000
    Assignee: Elf Atochem S.A.
    Inventors: Jean-Yves Cavaille, Henri Chanzy, Veronique Favier, Benoit Ernst
  • Mixtures of polymer having polyamide blocks and copolymers having vinylaromatic units and anhydride units
    Patent number: 5998545
    Abstract: The present invention relates to a mixture of polymers (A) having polyamide blocks and copolymers (B) comprising vinylaromatic units and unsaturated carboxylic anhydride units, the quantity of (B) being sufficient for the melt index (or melt flow index, MFI) of the mixture of (A) and (B) to be less than the melt index of (A) alone.It also relates to masterbatches of (A) and (B).
    Type: Grant
    Filed: January 22, 1998
    Date of Patent: December 7, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Denis Melot, Alain Bouilloux, Benoit Ernst
  • Latex based on vinyl chloride copolymers with a specific structure, process for the manufacture thereof and applications thereof
    Patent number: 5872155
    Abstract: The present invention relates to vinyl chloride copolymers, in the latex form, the particles of which are composed of a core, of an outer layer and optionally of an intermediate layer. It also relates to the process for the manufacture of this latex by seeded miscosuspension polymerization and to its applications in paints and plastisols.
    Type: Grant
    Filed: May 30, 1997
    Date of Patent: February 16, 1999
    Assignee: Elf Atochem S.A.
    Inventors: Philippe Espiard, Richard Peres, Benoit Ernst