Patents by Inventor Yves Le Du

Yves Le Du 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).

  • Structure comprising a binder layer non-delaminable with respect to a metallized substrate and peelable with respect to a polypropylene substrate
    Patent number: 6960392
    Abstract: A multilayer structure of, in succession, a metal layer or a metallized-substrate layer, a layer of a polypropylene-based binder extrusion-coated at a rate of more than 100 m/min. and optionally a polypropylene layer, the metal or metallized layer and the binder layer being made non-delaminable by heat treating the structure. The extrudable binder contains by weight: (A) 5 to 30% of a copolymer of ethylene and one or more comonomers chosen from the group of carboxylic acid esters, vinyl esters and dienes in particular the ethylene/alkyl (meth)acrylate/maleic anhydride terpolymer; (B) 40 to 93% of a stretchable polypropylene; and (C) 2 to 30% of a polypropylene functionalized by an unsaturated carboxylic acid anhydride, especially maleic anhydride; the MFI of the composition being between 10 and 50 g/10 min. (at 230° C./2.16 kg). the multi-layer structure is useful for the production of packages.
    Type: Grant
    Filed: March 30, 2001
    Date of Patent: November 1, 2005
    Assignee: Arkema
    Inventors: Yves Le Du, Patrice Perret
  • Structure comprising a binder layer non-delaminable with respect to a metallized substrate and peelable with respect to a polyropylene substrate
    Publication number: 20020034649
    Abstract: A multilayer structure of, in succession, a metal layer or a metallized-substrate layer, a layer of a polypropylene-based binder extrusion-coated at a rate of more than 100 m/min. and optionally a polypropylene layer, the metal or metallized layer and the binder layer being made non-delaminable by heat treating the structure. The extrudable binder contains by weight: (A) 5 to 30% of a copolymer of ethylene and one or more comonomers chosen from the group of carboxylic acid esters, vinyl esters and dienes in particular the ethylene/alkyl (meth)acrylate/maleic anhydride terpolymer; (B) 40 to 93% of a stretchable polypropylene; and (C) 2 to 30% of a polypropylene functionalized by an unsaturated carboxylic acid anhydride, especially maleic anhydride; the MFI of the composition being between 10 and 50 g/10 min. (at 230° C./2.16 kg). the multi-layer structure is useful for the production of packages.
    Type: Application
    Filed: March 30, 2001
    Publication date: March 21, 2002
    Applicant: ATOFINA
    Inventors: Yves Le Du, Patrice Perret
  • Article including a weld line based on a mixture of polyamide and polyolefin
    Patent number: 6235837
    Abstract: The invention relates to an article based on a mixture of polyamide and polyolefin, which article includes at least one weld line due to multi-port injection molding, said article characterized in that the ratio of the viscosities of the polyolefin to the polyamide, measured at a shear rate higher than 100 s−1, is greater than 0.70, and that the quantity of polyamide is sufficient for the elongation at break to be greater than 10%. A typical application is the production of an injection molded automobile fender.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: May 22, 2001
    Assignee: Atofina
    Inventors: Dominique Basset, Alain Bouilloux, Yves Le Du