Patents by Inventor Rika KURATANI

Rika KURATANI 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: 20240332745
    Abstract: Provided is a separator for a non-aqueous secondary battery, the separator contains a porous substrate and an adhesive porous layer that is provided on one side or on both sides of the porous substrate, and that contains a polyvinylidene fluoride type resin and a filler, in which a volume ratio of the filler in the adhesive porous layer excluding pores is from 30% by volume to 67% by volume, and when differential scanning calorimetry is performed with all of the polyvinylidene fluoride type resin contained in the adhesive porous layer as a sample, two or more endothermic peaks and/or two or more exothermic peaks are observed.
    Type: Application
    Filed: July 15, 2022
    Publication date: October 3, 2024
    Applicant: TEIJIN LIMITED
    Inventors: Rika KURATANI, Mai MIURA, Satoshi NISHIKAWA
  • Publication number: 20240322377
    Abstract: Provided is a separator for a non-aqueous secondary battery, the separator contains a porous substrate and an adhesive porous layer that is provided on one side or on both sides of the porous substrate, and that contains a polyvinylidene fluoride type resin and a filler, in which the porous substrate contains a fluorine atom, and when differential scanning calorimetry is performed with all of the polyvinylidene fluoride type resin contained in the adhesive porous layer as a sample, two or more endothermic peaks and/or two or more exothermic peaks are observed.
    Type: Application
    Filed: July 15, 2022
    Publication date: September 26, 2024
    Applicant: Teijin Limited
    Inventors: Rika KURATANI, Mai MIURA, Satoshi NISHIKAWA
  • Publication number: 20240291103
    Abstract: Provided is a separator for a non-aqueous secondary battery, the separator contains a porous substrate and an adhesive porous layer that is provided on one side or on both sides of the porous substrate, and that contains a polyvinylidene fluoride type resin and an inorganic filler, in which an average primary particle size of all of the inorganic filler contained in the adhesive porous layer is from 0.01 ?m to less than 0.50 ?m, and when differential scanning calorimetry is performed with all of the polyvinylidene fluoride type resin contained in the adhesive porous layer as a sample, two or more endothermic peaks and/or two or more exothermic peaks are observed.
    Type: Application
    Filed: July 15, 2022
    Publication date: August 29, 2024
    Applicant: TEIJIN LIMITED
    Inventors: Rika KURATANI, Mai MIURA, Satoshi NISHIKAWA
  • Publication number: 20230216143
    Abstract: A separator for a non-aqueous secondary battery contains: a porous substrate and a heat-resistant porous layer that is provided on one side or on both sides of the porous substrate, and that contains a resin and inorganic particles, in which (A) the resin contains a copolymer having a vinylidene fluoride unit and a hexafluoropropylene unit satisfying particular requirements, a content of the inorganic particles in the heat-resistant porous layer is from 50% by mass to 90% by mass, and the inorganic particles contain first inorganic particles and second inorganic particles satisfying particular size requirements, or (B) a content of the inorganic particles in the heat-resistant porous layer is from 50% by mass to 90% by mass, and the inorganic particles contain first inorganic particles that are metal sulfate (or metal hydroxide) particles and second inorganic particles that are inorganic particles other than metal sulfate (or metal hydroxide) particles.
    Type: Application
    Filed: May 27, 2021
    Publication date: July 6, 2023
    Applicant: Teijin Limited
    Inventors: Rika KURATANI, Satoshi NISHIKAWA
  • Publication number: 20220190441
    Abstract: Provided is a separator for a non-aqueous secondary battery containing a porous substrate; and an adhesive porous layer that is provided on one side or on both sides of the porous substrate, and that contains a polyvinylidene fluoride type resin, an acrylic type resin and metal sulfate particles, in which an average primary particle diameter of the metal sulfate particles contained in the adhesive porous layer is from 0.01 ?m to less than 0.30 ?m.
    Type: Application
    Filed: February 14, 2020
    Publication date: June 16, 2022
    Applicant: TEIJIN LIMITED
    Inventors: Hiroshi SAKURAI, Rika KURATANI, Satoshi NISHIKAWA
  • Publication number: 20220149483
    Abstract: An embodiment of the invention provide a separator for a non-aqueous secondary battery, including a porous substrate; and a heat-resistant porous layer that is provided on one side or on both sides of the porous substrate, and that contains a binder resin and barium sulfate particles, in which an average primary particle diameter of the barium sulfate particles contained in the heat-resistant porous layer is from 0.01 ?m to less than 0.30 ?m, and in which a volume ratio of the barium sulfate particles in the heat-resistant porous layer is from 30% by volume to less than 50% by volume.
    Type: Application
    Filed: March 23, 2020
    Publication date: May 12, 2022
    Applicant: TEIJIN LIMITED
    Inventors: Megumi SATO, Rika KURATANI, Yu NAGAO, Masato OKAZAKI, Satoshi NISHIKAWA
  • Publication number: 20200411827
    Abstract: An embodiment according to the invention provides a separator for a non-aqueous secondary battery, containing a porous substrate and an adhesive porous layer that contains resin A and resin B1; (1) resin A: a copolymer containing vinylidene fluoride (VDF) and hexafluoropropylene (HFP), in which a molar content of HFP monomer unit with respect to a total molar quantity of VDF monomer unit and HFP monomer unit is from more than 1.5 mol % to 3.5 mol %, and (2) resin B1: a copolymer containing VDF, HFP, and a monomer of formula (1), in which a molar content of HFP monomer unit with respect to a total molar quantity of VDF monomer unit, HFP monomer unit, and a monomer unit of formula (1) is from more than 3.5 mol % to 15 mol % (R1 to R3: H, a halogen atom, a carboxyl group, etc., or a C1-5 alkyl group; X: a single bond, a C1-5 alkylene group, etc., Y: H, a C1-5 alkyl group, etc.
    Type: Application
    Filed: November 29, 2018
    Publication date: December 31, 2020
    Applicant: Teijin Limited
    Inventors: Rika KURATANI, Megumi SATO, Satoshi NISHIKAWA
  • Publication number: 20200343511
    Abstract: Provided is a separator for a non-aqueous secondary battery containing a porous substrate; and a heat resistant porous layer that is provided on one side or on both sides of the porous substrate, and that contains a binder resin and barium sulfate particles, in which an average primary particle size of the barium sulfate particles contained in the heat resistant porous layer is from 0.01 ?m to less than 0.30 ?m.
    Type: Application
    Filed: September 18, 2018
    Publication date: October 29, 2020
    Applicant: TEIJIN LIMITED
    Inventors: Yu NAGAO, Megumi SATO, Rika KURATANI, Masato OKAZAKI, Satoshi NISHIKAWA
  • Patent number: 10811654
    Abstract: A separator for a non-aqueous secondary battery, containing a porous substrate, and an adhesive porous layer that is provided on one side or both sides of the porous substrate, in which the adhesive porous layer contains a polyvinylidene fluoride type resin including a vinylidene fluoride monomer unit and a hexafluoropropylene monomer unit, and the polyvinylidene fluoride type resin has an acid value of from 3.0 mgKOH/g to 20 mgKOH/g.
    Type: Grant
    Filed: November 8, 2016
    Date of Patent: October 20, 2020
    Assignee: TEIJIN LIMITED
    Inventors: Susumu Honda, Satoshi Nishikawa, Takashi Yoshitomi, Rika Kuratani
  • Patent number: 10714723
    Abstract: Provided is a separator for a non-aqueous secondary battery, including: a porous substrate having an average pore diameter of from 20 nm to 100 nm; and a porous layer provided on one or both sides of the porous substrate and including a polyvinylidene fluoride resin and a filler, the porous layer including a filler in an amount of from 45% by volume to 75% by volume with respect to a total solid content of the porous layer, a weight average molecular weight of the polyvinylidene fluoride resin being 1,000,000 or more, and a peel strength between the porous substrate and the porous layer being 0.20 N/12 mm or more.
    Type: Grant
    Filed: June 22, 2015
    Date of Patent: July 14, 2020
    Assignee: TEIJIN LIMITED
    Inventors: Rika Kuratani, Satoshi Nishikawa
  • Patent number: 10199623
    Abstract: A separator for a nonaqueous secondary battery, including a porous substrate and an adhesive porous layer that is formed on at least one side of the porous substrate and contains a carbon material and a polyvinylidene fluoride resin. The separator has an initial static voltage of 0 V as measured in accordance with JIS L1094.
    Type: Grant
    Filed: January 29, 2015
    Date of Patent: February 5, 2019
    Assignee: TEIJIN LIMITED
    Inventors: Rika Kuratani, Satoshi Nishikawa
  • Publication number: 20180331342
    Abstract: A separator for a non-aqueous secondary battery, containing a porous substrate, and an adhesive porous layer that is provided on one side or both sides of the porous substrate, in which the adhesive porous layer contains a polyvinylidene fluoride type resin including a vinylidene fluoride monomer unit and a hexafluoropropylene monomer unit, and the polyvinylidene fluoride type resin has an acid value of from 3.0 mgKOH/g to 20 mgKOH/g.
    Type: Application
    Filed: November 8, 2016
    Publication date: November 15, 2018
    Applicant: TEIJIN LIMITED
    Inventors: Susumu HONDA, Satoshi NISHIKAWA, Takashi YOSHITOMI, Rika KURATANI
  • Publication number: 20180212220
    Abstract: Provided is a separator for a non-aqueous secondary battery, including: a porous substrate having an average pore diameter of from 20 nm to 100 nm; and a porous layer provided on one or both sides of the porous substrate and including a polyvinylidene fluoride resin and a filler, the porous layer including a filler in an amount of from 45% by volume to 75% by volume with respect to a total solid content of the porous layer, a weight average molecular weight of the polyvinylidene fluoride resin being 1,000,000 or more, and a peel strength between the porous substrate and the porous layer being 0.20 N/12 mm or more.
    Type: Application
    Filed: June 22, 2015
    Publication date: July 26, 2018
    Applicant: Teijin Limited
    Inventors: Rika KURATANI, Satoshi NISHIKAWA
  • Publication number: 20170005307
    Abstract: A separator for a nonaqueous secondary battery, including a porous substrate and an adhesive porous layer that is formed on at least one side of the porous substrate and contains a carbon material and a polyvinylidene fluoride resin. The separator has an initial static voltage of 0 V as measured in accordance with JIS L1094.
    Type: Application
    Filed: January 29, 2015
    Publication date: January 5, 2017
    Applicant: TEIJIN LIMITED
    Inventors: Rika KURATANI, Satoshi NISHIKAWA