Patents by Inventor Carlos R. Lopez-Barron

Carlos R. Lopez-Barron 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).

  • Publication number: 20180155471
    Abstract: Disclosed is an article comprising polymers and copolymers selected from the group consisting of poly(vinylbiphenyl), poly(vinylcyclohexylstyrene), substituted versions thereof, and blends thereof, the polymer or copolymer having a weight average molecular weight (Mw) of at least 100 kg/mole and a glass transition temperature (Tg) of at least 100° C. The polymers are desirably processed in the melted state at a temperature of at least 150° C. to impart orientation and extensional strain hardening.
    Type: Application
    Filed: November 9, 2017
    Publication date: June 7, 2018
    Inventors: Carlos R. Lopez-Barron, Mark K. Davis, Alan A. Galuska, Yong Yang, Mosha H. Zhao
  • Publication number: 20180118860
    Abstract: This invention relates to a supported catalyst system and process for use thereof. In particular, the catalyst system includes a pyridyldiamido transition metal complex, a metallocene compound, a support material and, optionally, an activator. The catalyst system may be used for preparing multi-modal polyolefins.
    Type: Application
    Filed: March 10, 2016
    Publication date: May 3, 2018
    Inventors: Xuan YE, John R. HAGADORN, Matthew W. HOLTCAMP, Gregory S. DAY, David F. SANDERS, Carlos R. LOPEZ-BARRON
  • Publication number: 20180079900
    Abstract: Polymer blends comprising at least one olefin block copolymer such as poly(ethylene-b-ethylene/propylene-b-ethylene), and at least one propylene-based elastomer such as a propylene-ethylene random copolymer, such blends useful in elastic hygiene articles. The blends have improved permanent set compared to the propylene-based elastomer alone.
    Type: Application
    Filed: June 19, 2017
    Publication date: March 22, 2018
    Inventors: Jingwen Zhang, Carlos R. Lopez-Barron, Jan Kalfus, Abdul M. Jangda
  • Patent number: 9879104
    Abstract: This invention relates to a process to using an aminopyridinate scandium or yttrium metal (typically scandium) catalyst compound to produce ethylene conjugated diene copolymers, preferably ethylene isoprene copolymers having: 1) from 75 to 90 mol % ethylene; 2) from 10 to 25 mol % isoprene; 3) a Tg of 0° C. or less; 4) 1,4 isomer present at 60 wt % or less; 5) 3,4 and 1,2 present at 40% or more; 6) Mn of 250,000 g/mol or less; and 7) optionally, a Tm of 100° C. or less.
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: January 30, 2018
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: John F. Walzer, Jr., Anna A. Michels, John R. Hagadorn, Sarah J. Mattler, Carlos R. Lopez-Barron, Anthony J. Dias
  • Patent number: 9815946
    Abstract: Disclosed herein is a method to stabilize a poly(arylene ether) comprising combining a neat or diluted poly(arylene ether) with a vinyl or vinylidene-terminated polyolefin at a temperature of at least 80° C. to form heated reaction components; combining a Br?nsted acid or Lewis acid with the heated reaction components; and isolating a polyolefin-poly(arylene ether) copolymer composition.
    Type: Grant
    Filed: July 15, 2014
    Date of Patent: November 14, 2017
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Yong Yang, Carlos R. Lopez-Barron
  • Publication number: 20170275409
    Abstract: A process for preparing a polyethylene composition comprising contacting ethylene with a first salan catalyst precursor and an activator to form branched vinyl/vinylidene-terminated high density polyethylene having a number average molecular weight (Mn) of at least 5,000 g/mole; and contacting the branched vinyl/vinylidene-terminated high density polyethylene with ethylene and a second metallocene catalyst precursor and an activator to form a comb-block HDPE. The polyethylene composition comprises a polyethylene backbone, and one or more branched high density polyethylene combs pendant to the backbone, the combs having an Mn of at least 5,000 g/mole, where the polyethylene has a branching index (g?) of less than 0.9.
    Type: Application
    Filed: February 9, 2017
    Publication date: September 28, 2017
    Inventors: Andy H. Tsou, Crisita Carmen C.H. Atienza, Peijun Jiang, Antonios Doufas, Carlos R. Lopez-Barron
  • Publication number: 20170073448
    Abstract: An atactic polypropylene comb-block polyolefin comprising two blocks including a polyolefin backbone and atactic polypropylene combs pendant to the backbone having a weight average molecular weight of at least 8000 g/mole and a crystallinity of less than 20%, where the atactic polypropylene comb-block polyolefin has comb number of at least 2. The atactic polypropylene comb-block polyolefin is made by contacting at a temperature within a range from 20 to 70° C. propylene with a first metallocene precursor to form vinyl-terminated atactic polypropylene to form vinyl-terminated atactic polypropylene, then contacting at a temperature within a range from 40 to 150° C. the vinyl-terminated atactic polypropylene with ethylene, propylene, or both and a second metallocene precursor to form the backbone.
    Type: Application
    Filed: July 19, 2016
    Publication date: March 16, 2017
    Inventors: Andy H. Tsou, George Rodriguez, Carlos R. Lopez-Barron, Donna J. Crowther, Hillary L. Bradshaw, Antonios K. Doufas
  • Publication number: 20160319057
    Abstract: This invention relates to a process to using an aminopyridinate scandium or yttrium metal (typically scandium) catalyst compound to produce ethylene conjugated diene copolymers, preferably ethylene isoprene copolymers having: 1) from 75 to 90 mol % ethylene; 2) from 10 to 25 mol % isoprene; 3) a Tg of 0° C. or less; 4) 1,4 isomer present at 60 wt % or less; 5) 3,4 and 1,2 present at 40% or more; 6) Mn of 250,000 g/mol or less; and 7) optionally, a Tm of 100° C. or less.
    Type: Application
    Filed: March 29, 2016
    Publication date: November 3, 2016
    Inventors: John F. Walzer, JR., Anna A. Michels, John R. Hagadorn, Sarah J. Mattler, Carlos R. Lopez-Barron, Anthony J. Dias
  • Publication number: 20160130395
    Abstract: Disclosed herein is a method to stabilize a poly(arylene ether) comprising combining a neat or diluted poly(arylene ether) with a vinyl or vinylidene-terminated polyolefin at a temperature of at least 80° C. to form heated reaction components; combining a Br?nsted acid or Lewis acid with the heated reaction components; and isolating a polyolefin-poly(arylene ether) copolymer composition.
    Type: Application
    Filed: July 15, 2014
    Publication date: May 12, 2016
    Inventors: Yong Yang, Carlos R. Lopez-Barron
  • Patent number: 9273163
    Abstract: This invention relates to the reaction product(s) of a polyalkylhydrosiloxane and a vinyl terminated macromonomer (VTM).
    Type: Grant
    Filed: September 20, 2013
    Date of Patent: March 1, 2016
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Donna J. Crowther, Man Kit Ng, Charles J. Ruff, Patrick Brant, Jacqueline A. Lovell, Carlos R. Lopez-Barron
  • Publication number: 20140088263
    Abstract: This invention relates to the reaction product(s) of a polyalkylhydrosiloxane and a vinyl terminated macromonomer (VTM).
    Type: Application
    Filed: September 20, 2013
    Publication date: March 27, 2014
    Inventors: Donna J. Crowther, Man Kit Ng, Charles J. Ruff, Patrick Brant, Jacqueline A. Lovell, Carlos R. Lopez-Barron