Patents by Inventor Davidson Lütkenhaus

Davidson Lütkenhaus 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).

  • Patent number: 11648757
    Abstract: Embodiments of the present disclosure are directed to multilayer structures. The multilayer structures may include a first layer and a barrier layer. The first layer may include, based on the total weight of the first layer, from 90 wt. % to 99.5 wt. % of an ethylene/alpha-olefin interpolymer having a density of from 0.945 g/cc to 0.970 g/cc and from 0.5 wt. % to 10 wt. % of a compatibilizer. The compatibilizer may include an anhydride and/or carboxylic acid functionalized ethylene/alpha-olefin elastomer having a density of from 0.850 g/cc to 0.910 g/cc and a melt viscosity of greater than 200,000 cP, when measured at 177 C.
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: May 16, 2023
    Assignee: Dow Global Technologies LLC
    Inventors: Felipe Dantas Barbosa, Jorge Caminero Gomes, Davidson Lütkenhaus, Nicolas Cardoso Mazzola
  • Publication number: 20220274385
    Abstract: Embodiments of the present disclosure are directed to multilayer structures. The multilayer structures may include a first layer and a barrier layer. The first layer may include, based on the total weight of the first layer, from 90 wt. % to 99.5 wt. % of an ethylene/alpha-olefin interpolymer having a density of from 0.945 g/cc to 0.970 g/cc and from 0.5 wt. % to 10 wt. % of a compatibilizer. The compatibilizer may include an anhydride and/or carboxylic acid functionalized ethylene/alpha-olefin elastomer having a density of from 0.850 g/cc to 0.910 g/cc and a melt viscosity of greater than 200,000 cP, when measured at 177 C.
    Type: Application
    Filed: July 23, 2020
    Publication date: September 1, 2022
    Inventors: Felipe Dantas Barbosa, Jorge Caminero Gomes, Davidson Lütkenhaus, Nicolas Cardoso Mazzola
  • Patent number: 11193009
    Abstract: Provided is a method for increasing the melt strength and/or low shear viscosity of a polyethylene resin. The method includes: a) providing a polyethylene composition including the reaction product of ethylene and optionally, one or more alpha-olefin comonomers, wherein the polyethylene composition is characterized by the following properties: a density ranging from 0.900 g/cm3 to 0.970 g/cm3, a molecular weight distribution (Mw/Mn) ranging from 2.6 to 3.5, and from 0.10 to 0.27 vinyl groups per 1,000 total carbon atoms; b) providing a masterbatch composition including a free radical generator and a polyethylene resin, wherein the free radical generator has a half-life at 220° C. of less than 200 seconds, and a decomposition energy higher than ?250 kJ/mol, and wherein the polyethylene resin has a density ranging from 0.900 g/cm3 to 0.970 g/cm3, melt index ranging from 0.
    Type: Grant
    Filed: September 14, 2018
    Date of Patent: December 7, 2021
    Assignees: Dow Global Technologies LLC, PBBPolisur S.R.L.
    Inventors: Surya Ssubramaniam, Mehmet Demirors, Teresa P. Karjala, Jorge C. Gomes, Guillermo A. Raimondi, Davidson Lütkenhaus, Marie De Luján Tricotti
  • Publication number: 20200239673
    Abstract: A method for increasing the melt strength and/or low shear viscosity of a polyethylene resin, the method comprising a) providing a polyethylene composition comprising the reaction product of ethylene and optionally, one or more alpha-olefin comonomers, wherein the polyethylene composition is characterized by the following properties: a density ranging from 0.900 g/cm3 to 0.970 g/cm3, a molecular weight distribution (Mw/Mn) ranging from 2.6 to 3.5, and from 0.10 to 0.27 vinyl groups per 1,000 total carbon atoms; b) providing a masterbatch composition comprising a free radical generator and a polyethylene resin, wherein the free radical generator has a half-life at 220 C of less than 200 seconds, and a decomposition energy higher than ?250 kJ/mol, and wherein the polyethylene resin has a density ranging from 0.900 g/cm3 to 0.970 g/cm3, melt index ranging from 0.01 g/10 min to 100 g/10 min; and c) reacting the polyethylene composition with the masterbatch composition to form a modified polyethylene composition.
    Type: Application
    Filed: September 14, 2018
    Publication date: July 30, 2020
    Applicants: Dow Global Technologies LLC, PBBPolisur S.R.L.
    Inventors: Surya Ssubramaniam, Mehmet Demirors, Teresa P. Karjala, Jorge Caminero Gomes, Guillermo A. Raimondi, Davidson Lütkenhaus, Marie De Luján Tricotti