Patents by Inventor Herve Collette

Herve Collette 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).

  • Catalytic system which can be used for the stereospecific polymerisation of .alpha.-olefins, process for this polymerisation and polymers obtained
    Patent number: 6083866
    Abstract: Catalytic system which can be used for the polymerisation of .alpha.-olefins comprising:a solid based on complexed titanium trichloride of .delta. crystalline form;an organoaluminium compound;an organic oxygenated silicon compound; characterised in that the organoaluminium compound is a non-halogenated compound.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: July 4, 2000
    Assignee: Solvay Polyolefins Europe-Belgium
    Inventors: Jean-Louis Costa, Sabine Pamart, Herve Collette, Serge Bettonville
  • Process for the polymerisation of alpha-olefins using a cocatalytic composition
    Patent number: 5824754
    Abstract: Cocatalytic composition resulting from bringing an organoaluminium halide (A) into contact with an electron-donating organic compound (ED) selected from esters, amides and ketones, the organoaluminium halide (A) possessing an atomic ratio halogen (X)/aluminium (Al) of greater than 1 and less than 1.3, the halide (A) and the compound (ED) being employed in a mole ratio halide (A)/compound (ED) of greater than 20. Catalytic systems which are usable for the polymerization of alpha-olefins, comprising such a cocatalytic composition and a solid based on titanium trichloride complexed with an electron-donating compound.
    Type: Grant
    Filed: February 23, 1996
    Date of Patent: October 20, 1998
    Assignee: Solvay Polyolefins Europe - Belgium (Societe Anonyme)
    Inventors: Paul Fiasse, Herve Collette
  • Catalytic system which may be used for the polymerization of alpha-olefins and process for this polymerization
    Patent number: 5604171
    Abstract: Catalytic composition which may be used for the polymerization of alpha-olefins, comprising:(a) a solid catalyst comprising on titanium trichloride (TiCl.sub.3),(b) a non-halogen-containing cocatalyst comprising at least one non-halogen-containing organoaluminium compound,characterized in that the non-halogen-containing cocatalyst additionally contains at least one aminoalane containing no active hydrogen.Such a catalytic system may additionally contain a tertiary constituent chosen from oxygenated organosilicon compounds.
    Type: Grant
    Filed: November 4, 1994
    Date of Patent: February 18, 1997
    Assignee: Solvay (Societe Anonyme)
    Inventors: Herve Collette, Sabine Pamart
  • Cocatalytic composition which is usable for the polymerization of alpha-olefins
    Patent number: 5204305
    Abstract: Cocatalytic composition resulting from bringing an organoaluminium halide (A) into contact with an electron-donating organic compound (ED) selected from esters, amides and ketones, the organoaluminium halide (A) possessing an atomic ratio halogen (X)/aluminium (Al) of greater than 1 and less than 1.3, the halide (A) and the compound (ED) being employed in a mole ratio halide (A)/compound (ED) of greater than 20.Catalytic systems which are usable for the polymerisation of alpha-olefins, comprising such a cocatalytic composition--and a solid based on titanium trichloride complexed with an electron-donating compound.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: April 20, 1993
    Assignee: Solvay S.A.
    Inventors: Paul Fiasse, Herve Collette