Patents by Inventor Lesley Hwang

Lesley Hwang 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: 20230257553
    Abstract: The present disclosures are directed to a silane coupling agent, two silane functional polymers, a method of making a silane coupling agent, the use of a silane coupling agent for making a silane functional polymer, a method of making a silane functional polymer by removing a protecting group, and a composition comprising one or more silane functional polymers.
    Type: Application
    Filed: February 15, 2023
    Publication date: August 17, 2023
    Inventors: Matthew J. PINNOW, Yogesh CHANDRASEKARAN, Lesley HWANG, Christopher M. PAPPAS, Nidhi SHARMA
  • Publication number: 20230183453
    Abstract: The present disclosures are directed to a composition comprising at least one silane functional amine; a method of preparing a silane functional amine; a rubber composition comprising at least one silane functional amine, at least one diene-based polymer, silica, at least one process aid, and a vulcanizing package comprising at least one vulcanizing agent comprising sulfur and at least one accelerator; and a process of preparing a rubber composition.
    Type: Application
    Filed: December 9, 2022
    Publication date: June 15, 2023
    Inventors: Matthew J. PINNOW, Adeyemi A. ADEPETUN, Richard W. CRUSE, Lesley HWANG, Nancy WINCHESTER, Linda VECERE, Yanjun ZHU
  • Patent number: 11267955
    Abstract: A silane based additive, rubber formulations including the additive and tires having tread portions made with the additive, together with methods of forming those products, are provided. Uncured rubber formulations in accordance with preferred embodiments of the invention comprise (1) a rubbery primary polymer or polymer blend, such as natural rubber and/or synthetic rubber; (2) reinforcing silica filler; (3) a network forming monomer or polymer, especially a thermosetting network forming moiety, for forming a secondary polymeric network; and (4) a silane containing one or more moieties of the aforementioned network forming polymer. In particular networks which can be generated in-situ are preferred. The cured rubber formulation should comprise the silica, having the secondary polymer network coupled thereto, within the rubber matrix, and not directly to the rubber chains via sulfidic linkages.
    Type: Grant
    Filed: November 5, 2019
    Date of Patent: March 8, 2022
    Assignee: Momentive Performance Materials Inc.
    Inventors: William Michael York, Adeyemi Adedayo Adepetun, Lesley Hwang, Eric Pohl
  • Publication number: 20200332052
    Abstract: An alkoxysilyl-containing polyurethane polymer composition is prepared using a urethane-forming organometallic catalyst which is then stabilized to moisture exposure by the addition of a mercapto-containing compound. The stabilized moisture-curable alkoxsilyl-containing polyurethane polymer composition is activated to moisture curing by the addition of a hydrolysis and condensation catalysts. The stabilized moisture-curable alkoxsilyl-containing polyurethane polymer composition is useful as a component in the preparation of coatings, adhesives, sealants, consumer goods and industrial goods.
    Type: Application
    Filed: April 17, 2020
    Publication date: October 22, 2020
    Inventors: Misty Weiyu Huang, Lesley Hwang, Matthew J. Pinnow
  • Publication number: 20200140662
    Abstract: A silane based additive, rubber formulations including the additive and tires having tread portions made with the additive, together with methods of forming those products, are provided. Uncured rubber formulations in accordance with preferred embodiments of the invention comprise (1) a rubbery primary polymer or polymer blend, such as natural rubber and/or synthetic rubber; (2) reinforcing silica filler; (3) a network forming monomer or polymer, especially a thermosetting network forming moiety, for forming a secondary polymeric network; and (4) a silane containing one or more moieties of the aforementioned network forming polymer. In particular networks which can be generated in-situ are preferred. The cured rubber formulation should comprise the silica, having the secondary polymer network coupled thereto, within the rubber matrix, and not directly to the rubber chains via sulfidic linkages.
    Type: Application
    Filed: November 5, 2019
    Publication date: May 7, 2020
    Inventors: William Michael York, Adeyemi Adedayo Adepetun, Lesley Hwang, Eric Pohl
  • Patent number: 10294251
    Abstract: A transesterification process for preparing alkoxysilane includes removal of metal transesterification catalyst from the alkoxysilane transesterification reaction medium.
    Type: Grant
    Filed: June 7, 2017
    Date of Patent: May 21, 2019
    Assignee: Momentive Performance Materials Inc.
    Inventors: Alain Lejeune, Antonio Chaves, Tiberiu Simandan, Ilaria Vecchi, Lesley Hwang, Andrea Trotto
  • Publication number: 20170355720
    Abstract: A transesterification process for preparing alkoxysilane includes removal of metal transesterification catalyst from the alkoxysilane transesterification reaction medium.
    Type: Application
    Filed: June 7, 2017
    Publication date: December 14, 2017
    Inventors: Alain Lejeune, Antonio Chaves, Tiberiu Simandan, Ilaria Vecchi, Lesley HWANG, Andrea Trotto
  • Publication number: 20170240750
    Abstract: The invention is directed to a detectable and stable composition comprising an organofunctional silane and/or hydrolyzate and/or partial or complete condensate thereof, a colloidal metal oxide, a water soluble organic dye having a positive charge and a counterion derived from a carboxylic acid of from 1 to 6 carbon atoms, and water. The invention is also directed to a method for determining the uniformity and film thickness of a detectable composition applied to a substrate comprising applying to the surface of the substrate the detectable composition and measuring an optical property of the applied coating, the resulting measurement being related to the uniformity of the applied composition.
    Type: Application
    Filed: May 5, 2017
    Publication date: August 24, 2017
    Inventor: Lesley Hwang
  • Patent number: 9676948
    Abstract: The invention is directed to a detectable and stable composition comprising an organofunctional silane and/or hydrolyzate and/or partial or complete condensate thereof, a colloidal metal oxide, a water soluble organic dye having a positive charge and a counterion derived from a carboxylic acid of from 1 to 6 carbon atoms, and water. The invention is also directed to a method for determining the uniformity and film thickness of a detectable composition applied to a substrate comprising applying to the surface of the substrate the detectable composition and measuring an optical property of the applied coating, the resulting measurement being related to the uniformity of the applied composition.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: June 13, 2017
    Assignee: Momentive Performance Materials Inc.
    Inventor: Lesley Hwang
  • Patent number: 9606048
    Abstract: The present invention relates to a method for measuring the weight of a passivation coating composition on a moving substrate with minimal interruption. The method of present invention is especially useful for effective quality control in an industrial setting.
    Type: Grant
    Filed: June 30, 2014
    Date of Patent: March 28, 2017
    Assignee: Momentive Performance Materials Inc.
    Inventors: Vikram Kumar, Lesley Hwang, Kujtim Bizati
  • Patent number: 9243152
    Abstract: The present invention relates to stable, zero or low VOC epoxy-containing polysiloxane oligomer compositions that provide for a high degree of chemical resistance to compositions containing organic resins, while at the same time, maintaining or improving the flexibility of these organic resin-containing compositions, to processes for preparing epoxy-containing polysiloxane oligomer compositions, and to uses in coatings, sealants, adhesives, and composites containing the same.
    Type: Grant
    Filed: April 8, 2014
    Date of Patent: January 26, 2016
    Assignee: Momentive Performance Materials Inc.
    Inventors: Narayana Padmanabha Iyer, Lesley Hwang, Vikram Kumar, Christian Geismann, Constantine Kondos, Shiu-Chin Su
  • Publication number: 20150377608
    Abstract: The present invention relates to a method for measuring the weight of a passivation coating composition on a moving substrate with minimal interruption. The method of present invention is especially useful for effective quality control in an industrial setting.
    Type: Application
    Filed: June 30, 2014
    Publication date: December 31, 2015
    Inventors: VIKRAM KUMAR, Lesley Hwang, Kujtim Bizati
  • Publication number: 20140342164
    Abstract: The invention is directed to a detectable and stable composition comprising an organofunctional silane and/or hydrolyzate and/or partial or complete condensate thereof, a colloidal metal oxide, a water soluble organic dye having a positive charge and a counterion derived from a carboxylic acid of from 1 to 6 carbon atoms, and water. The invention is also directed to a method for determining the uniformity and film thickness of a detectable composition applied to a substrate comprising applying to the surface of the substrate the detectable composition and measuring an optical property of the applied coating, the resulting measurement being related to the uniformity of the applied composition.
    Type: Application
    Filed: March 24, 2014
    Publication date: November 20, 2014
    Applicant: Momentive Performance Materials Inc.
    Inventor: Lesley Hwang
  • Publication number: 20140221531
    Abstract: The present invention relates to stable, zero or low VOC epoxy-containing polysiloxane oligomer compositions that provide for a high degree of chemical resistance to compositions containing organic resins, while at the same time, maintaining or improving the flexibility of these organic resin-containing compositions, to processes for preparing epoxy-containing polysiloxane oligomer compositions, and to uses in coatings, sealants, adhesives, and composites containing the same.
    Type: Application
    Filed: April 8, 2014
    Publication date: August 7, 2014
    Applicant: MOMENTIVE PERFORMANCE MATERIALS INC.
    Inventors: Narayana Padmanabha Iyer, Lesley Hwang, Vikram Kumar, Christian Geismann, Constantine Kondos, Shiu-Chin Su
  • Patent number: 8728345
    Abstract: The present invention relates to stable, zero or low VOC epoxy-containing polysiloxane oligomer compositions that provide for a high degree of chemical resistance to compositions containing organic resins, while at the same time, maintaining or improving the flexibility of these organic resin-containing compositions, to processes for preparing epoxy-containing polysiloxane oligomer compositions, and to uses in coatings, sealants, adhesives, and composites containing the same.
    Type: Grant
    Filed: December 19, 2011
    Date of Patent: May 20, 2014
    Assignee: Momentive Performance Materials Inc.
    Inventors: Narayana Padmanabha Iyer, Lesley Hwang, Vikram Kumar, Christian Geismann, Constantine Kondos, Shiu-Chin Su
  • Publication number: 20130158159
    Abstract: The present invention relates to stable, zero or low VOC epoxy-containing polysiloxane oligomer compositions that provide for a high degree of chemical resistance to compositions containing organic resins, while at the same time, maintaining or improving the flexibility of these organic resin-containing compositions, to processes for preparing epoxy-containing polysiloxane oligomer compositions, and to uses in coatings, sealants, adhesives, and composites containing the same.
    Type: Application
    Filed: December 19, 2011
    Publication date: June 20, 2013
    Applicant: MOMENTIVE PERFORMANCE MATERIALS INC.
    Inventors: Narayana Padmanabha Iyer, Lesley Hwang, Vikram Kumar, Christian Geismann, Constantine Kondos, Shiu-Chin Su
  • Patent number: 7919650
    Abstract: Organofunctional silanes, inclusive of dimers and oligomers, are provided in which individual silanes possess both free and blocked mercaptan functionality or particular mixtures of the organofunctional silanes possess both free and blocked mercaptan functionality. The organofunctional silanes and silane mixtures are useful, inter alia, as coupling agents for elastomeric compositions, e.g., rubber formulations employed in the manufacture of tires, where they exhibit a desirable balance of low scorch and good performance properties.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: April 5, 2011
    Assignee: Momentive Performance Materials Inc.
    Inventors: Antonio Chaves, Eric R. Pohl, Linda Vecere, Lesley Hwang
  • Publication number: 20110021692
    Abstract: Sulfur-containing silanes described herein can serve as coupling agents for fillers in elastomer compositions used, for example, in tires, belts, hoses, shoe soles, seals, gaskets, and the like. The sulfur containing silanes advantageously reduce or eliminate the generation of volatile organic compounds (VOCs) during use.
    Type: Application
    Filed: July 27, 2010
    Publication date: January 27, 2011
    Applicant: MOMENTIVE PERFORMANCE MATERIALS INC.
    Inventors: Lesley Hwang, Antonio Chaves, Eric R. Pohl
  • Patent number: 7786200
    Abstract: Sulfur-containing silane and its partially to substantially complete hydrolyzate(s) are useful as additives for filled elastomeric compositions for tires and other cured rubber articles.
    Type: Grant
    Filed: July 31, 2008
    Date of Patent: August 31, 2010
    Assignee: Momentive Performance Materials Inc.
    Inventors: Lesley Hwang, Antonio Chaves, Eric R. Pohl
  • Patent number: 7718819
    Abstract: A process is provided for preparing organofunctional silanes, inclusive of dimers and oligomers, in which individual silanes possess both free and blocked mercaptan functionality or particular mixtures of the organofunctional silanes possess both free and blocked mercaptan functionality. The organofunctional silanes and silane mixtures are useful, inter alia, as coupling agents for elastomeric compositions, e.g., rubber formulations employed in the manufacture of tires, where they exhibit a desirable balance of low scorch and good performance properties.
    Type: Grant
    Filed: February 21, 2006
    Date of Patent: May 18, 2010
    Assignee: Momentive Performance Materials Inc.
    Inventors: Antonio Chaves, Eric R. Pohl, Linda Vecere, Lesley Hwang