Patents by Inventor Daisuke Mukohata

Daisuke Mukohata 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: 11279810
    Abstract: The foamed sheet of the present invention is a foamed sheet obtained by crosslinking and foaming a polyvinylidene fluoride-based resin composition comprising a polyvinylidene fluoride-based resin, wherein the polyvinylidene fluoride-based resin comprises a vinylidene fluoride-hexafluoropropylene copolymer, a density of the foamed sheet is not more than 180 kg/cm3, and an average cell diameter of the foamed sheet is not less than 100 ?m and not more than 500 ?m. According to the present invention, a crosslinked polyvinylidene fluoride-based resin foamed sheet having both good flame retardance and good flexibility and a process for producing the foamed sheet are provided.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: March 22, 2022
    Assignee: SEKISUI CHEMICAL CO., LTD.
    Inventors: Daisuke Mukohata, Koji Shimonishi
  • Publication number: 20210395476
    Abstract: The present invention provides a polyolefin resin foam sheet having an area density of 5 g/m2 or more and 400 g/m2 or less, and satisfying at least one of the following conditions (1) and (2) in thermogravimetric-mass spectrometry carried out at a heating rate of 10° C.min over an entire measurement temperature range of a 200 to 550° C. measurement temperature, condition (1): a combustion gas generation ratio X defined as a ratio of a peak area value of an amount of a combustion gas P having a mass-to-charge ratio m/z of 55 generated at a measurement temperature of 200 to 364° C. with respect to the peak area value of an amount of the combustion gas P generated over the entire measurement temperature range is 25% or less; and condition (2): a combustion gas generation ratio Y defined as a ratio of a peak area value of an amount of a combustion gas Q having a mass-to-charge ratio m/z of 69 generated at a measurement temperature of 200 to 364° C.
    Type: Application
    Filed: September 27, 2019
    Publication date: December 23, 2021
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Asami NAGAI, Daisuke MUKOHATA, Yasunari KUSAKA, Yoshito ARAI
  • Publication number: 20210395477
    Abstract: The present invention provides a polyolefin resin foam sheet having an area density of 5 g/m2 or more and 400 g/m2 or less, and having a time (t) required for a weight decrease from 90% by mass to 10% by mass, of 9 minutes or more, as measured by thermogravimetric analysis carried out at a heating rate of 10° C./min and a measurement temperature of 23° C. to 550° C. According to the present invention, a polyolefin resin foam sheet can be provided that has a high fire retardancy while maintaining a lightweight property.
    Type: Application
    Filed: September 27, 2019
    Publication date: December 23, 2021
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Asami NAGAI, Daisuke MUKOHATA
  • Patent number: 11136484
    Abstract: A heat-conducting sheet according to the present invention is a heat-conducting sheet having an initial Asker C hardness of 50 or less, the heat-conducting sheet containing an elastomer resin at the volume proportion of 30 to 70%, and a thermally conductive filler at the volume proportion of 30 to 70%, in which the elastomer resin has a viscosity at 25° C. of 3000 Pa·s or less, and the elastomer resin has a lamella length of 20 mm or more. According to the present invention, a heat-conducting sheet which has initial flexibility sufficient to exhibit excellent shape conformability and in which residual stress is reduced after compression by applying pressure can be provided.
    Type: Grant
    Filed: November 30, 2017
    Date of Patent: October 5, 2021
    Assignee: SEKISUI CHEMICAL CO., LTD.
    Inventors: Masahiro Hamada, Daisuke Mukohata, Koji Shimonishi, Yuuki Hoshiyama
  • Publication number: 20200062917
    Abstract: The foamed sheet of the present invention is a foamed sheet obtained by crosslinking and foaming a polyvinylidene fluoride-based resin composition comprising a polyvinylidene fluoride-based resin, wherein the polyvinylidene fluoride-based resin comprises a vinylidene fluoride-hexafluoropropylene copolymer, a density of the foamed sheet is not more than 180 kg/cm3, and an average cell diameter of the foamed sheet is not less than 100 ?m and not more than 500 ?m. According to the present invention, a crosslinked polyvinylidene fluoride-based resin foamed sheet having both good flame retardance and good flexibility and a process for producing the foamed sheet are provided.
    Type: Application
    Filed: February 27, 2018
    Publication date: February 27, 2020
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Daisuke MUKOHATA, Koji SHIMONISHI
  • Publication number: 20190358944
    Abstract: A resin laminate 10 comprises: at least one expandable resin layer 11 containing a resin and a thermally expandable graphite; and at least one foamed resin layer 12 made of a resin foam, wherein the sum of the values obtained by multiplying the thicknesses of the expandable resin layers 11 by expansion ratios is equal to or greater than the total thickness of the foamed resin layers 12.
    Type: Application
    Filed: September 12, 2017
    Publication date: November 28, 2019
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Daisuke MUKOHATA, Koji SHIMONISHI, Yasuo OOSATO, Michio SHIMAMOTO
  • Patent number: 10435533
    Abstract: Provided is a resin composite material having a small number of voids and excellent tenacity. The resin composite material may be one obtained by mixing a carbon material having a graphene structure and having a content of less than 1 weight % of a volatile component volatilizable at 200° C. and a thermoplastic resin. The resin composite material may be a resin composite material including a carbon material having a graphene structure and a thermoplastic resin, the resin composite material containing 5 parts by weight or more of the carbon material per 100 parts by weight of the thermoplastic resin and having a breaking strain of 50% or more as measured according to JIS K 7161.
    Type: Grant
    Filed: February 20, 2015
    Date of Patent: October 8, 2019
    Assignee: SEKISUI CHEMICAL CO., LTD.
    Inventors: Kazuhiro Sawa, Taichi Hamada, Daisuke Mukohata, Nobuhiko Inui
  • Patent number: 10377838
    Abstract: Provided is a resin composite material in which a carbon material with a graphene structure is dispersed in a synthetic resin and which has a high mechanical strength and a low linear expansion coefficient and a method for producing the resin composite material. A resin composite material contains a synthetic resin and a carbon material with a graphene structure dispersed in the synthetic resin, wherein the synthetic resin is grafted onto the carbon material and the grafting ratio thereof onto the carbon material is 5% to 3300% by weight. A method for producing a resin composite material includes the steps of: preparing a resin composite containing a synthetic resin and a carbon material with a graphene structure dispersed in the synthetic resin; and grafting the synthetic resin onto the carbon material concurrently with or after the step of preparing the resin composite.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: August 13, 2019
    Assignee: SEKISUI CHEMICAL CO., LTD.
    Inventors: Nobuhiko Inui, Daisuke Mukohata, Mitsuru Naruta, Kensuke Tsumura, Kazuhiro Sawa, Katsunori Takahashi, Koji Taniguchi
  • Publication number: 20190241786
    Abstract: A heat-conducting sheet according to the present invention is a heat-conducting sheet having an initial Asker C hardness of 50 or less, the heat-conducting sheet containing an elastomer resin at the volume proportion of 30 to 70%, and a thermally conductive filler at the volume proportion of 30 to 70%, in which the elastomer resin has a viscosity at 25° C. of 3000 Pa·s or less, and the elastomer resin has a lamella length of 20 mm or more. According to the present invention, a heat-conducting sheet which has initial flexibility sufficient to exhibit excellent shape conformability and in which residual stress is reduced after compression by applying pressure can be provided.
    Type: Application
    Filed: November 30, 2017
    Publication date: August 8, 2019
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Masahiro HAMADA, Daisuke MUKOHATA, Koji SHIMONISHI, Yuuki HOSHIYAMA
  • Publication number: 20190176448
    Abstract: The heat conductive sheet of the present invention has a laminated structure of resin layers including a heat-conductive resin layer comprising a platy heat-conductive filler, a sheet major surface being a plane perpendicular to laminated faces of the resin layers, and the major axis of the platy heat-conductive filler being oriented at an angle of 60° or more with respect to the sheet major surface. According to the present invention, a heat conductive sheet that achieves improvement of the heat conductivity thereof can be provided while the amount of the platy heat-conductive filler used is reduced, and the method for producing the same can also be provided.
    Type: Application
    Filed: August 8, 2017
    Publication date: June 13, 2019
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Daisuke MUKOHATA, Koji SHIMONISHI, Masahiro HAMADA, Keisuke FUKANO
  • Patent number: 10047219
    Abstract: Provided is a polyolefin-based resin composition capable of obtaining a molded product having a high modulus of elongation and a low coefficient of linear expansion. The polyolefin-based resin composition includes a polyolefin-based resin containing either one or both of an acid-modified polyolefin-based resin and a polyolefin-based resin with a hydroxyl group, and flaked graphite. The flaked graphite is uniformly dispersed in the polyolefin-based resin. As a result, a molded product formed by using the polyolefin-based resin composition has excellent mechanical strength such as a high modulus of elongation, a low coefficient of linear expansion, and high dimensional stability, and can be used for various applications such as a material that is suitable for use as the exterior panels of automobiles or a steel sheet replacement material.
    Type: Grant
    Filed: June 16, 2011
    Date of Patent: August 14, 2018
    Assignee: SEKISUI CHEMICAL CO., LTD.
    Inventors: Katsunori Takahashi, Daisuke Mukohata, Mitsuru Naruta, Kouji Taniguchi, Naoyuki Nagatani, Shouji Nozato
  • Publication number: 20170009045
    Abstract: Provided is a resin composite material having a small number of voids and excellent tenacity. The resin composite material may be one obtained by mixing a carbon material having a graphene structure and having a content of less than 1 weight % of a volatile component volatilizable at 200° C. and a thermoplastic resin. The resin composite material may be a resin composite material including a carbon material having a graphene structure and a thermoplastic resin, the resin composite material containing 5 parts by weight or more of the carbon material per 100 parts by weight of the thermoplastic resin and having a breaking strain of 50% or more as measured according to JIS K 7161.
    Type: Application
    Filed: February 20, 2015
    Publication date: January 12, 2017
    Inventors: Kazuhiro SAWA, Taichi HAMADA, Daisuke MUKOHATA, Nobuhiko INUI
  • Publication number: 20150073082
    Abstract: Provided is a resin composite material having a high modulus of elasticity. The resin composite material comprises a thermoplastic resin, exfoliated graphite, and an inorganic filler different from the exfoliated graphite.
    Type: Application
    Filed: March 11, 2013
    Publication date: March 12, 2015
    Inventors: Daisuke Mukohata, Katsunori Takahashi, Nobuhiko Inui
  • Publication number: 20140113988
    Abstract: To provide a resin composite material in which aggregation of silane compounds in the resin is suppressed and the linear expansion coefficient is lowered, and a method for producing the resin composite material. A resin composite material containing a resin and a silane compound 12 having a structure of the formula (1), wherein a molecular chain of the resin and a molecular chain of the silane compound 12 form an IPN structure or a semi-IPN structure, and a method for producing a resin composite material including a step of mixing a resin and a silane compound 12a to obtain a resin composition and an IPN structure formation step of allowing a plurality of the silane compounds 12a contained in the resin composition to be condensed with each other. Each of Rs in the formula (1) is independently selected from the group consisting of hydrogen, halogen and an arbitrary organic functional group and at least one thereof is a reactive organic functional group. x represents 1 or 1.5.
    Type: Application
    Filed: January 8, 2013
    Publication date: April 24, 2014
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Daisuke Mukohata, Nobuhiko Inui
  • Publication number: 20130310521
    Abstract: Disclosed herein are a resin composite material that has excellent mechanical strength and can be easily produced and a method for producing such a resin composite material. The resin composite material is obtained by chemically bonding a reactive polyfunctional compound to both a thermoplastic resin and a carbon material having a graphene structure. The resin composite material production method includes: a first step of chemically bonding the reactive polyfunctional compound and the thermoplastic resin together; and a second step of chemically bonding the reactive polyfunctional compound and the carbon material having a graphene structure together.
    Type: Application
    Filed: March 26, 2012
    Publication date: November 21, 2013
    Inventors: Daisuke Mukohata, Nobuhiko Inui, Katsunori Takahashi, Keiichi Osano
  • Publication number: 20130210955
    Abstract: Provided is a resin composite material in which a carbon material with a graphene structure is dispersed in a synthetic resin and which has a high mechanical strength and a low linear expansion coefficient and a method for producing the resin composite material. A resin composite material contains a synthetic resin and a carbon material with a graphene structure dispersed in the synthetic resin, wherein the synthetic resin is grafted onto the carbon material and the grafting ratio thereof onto the carbon material is 5% to 3300% by weight. A method for producing a resin composite material includes the steps of: preparing a resin composite containing a synthetic resin and a carbon material with a graphene structure dispersed in the synthetic resin; and grafting the synthetic resin onto the carbon material concurrently with or after the step of preparing the resin composite.
    Type: Application
    Filed: September 2, 2011
    Publication date: August 15, 2013
    Inventors: Nobuhiko Inui, Daisuke Mukohata, Mitsuru Naruta, Kensuke Tsumura, Kazuhiro Sawa, Katsunori Takahashi, Koji Taniguchi
  • Publication number: 20130126795
    Abstract: Provided is a polyolefin-based resin composition capable of obtaining a molded product having a high modulus of elongation and a low coefficient of linear expansion. The polyolefin-based resin composition includes a polyolefin-based resin, flaked graphite, and either one or both of a compound with a six-membered ring structure and a compound with a five-membered ring structure. The flaked graphite is uniformly dispersed in the polyolefin-based resin. Thus, a molded product formed using the polyolefin-based resin composition has excellent mechanical strength such as a high modulus of elongation, a low coefficient of linear expansion, and high dimensional stability, and can be used for various applications such as a material that is suitable for use as the exterior panels of automobiles or a sheet metal replacement material.
    Type: Application
    Filed: June 16, 2011
    Publication date: May 23, 2013
    Inventors: Katsunori Takahashi, Daisuke Mukohata, Kouji Taniguchi, Mitsuru Naruta, Shouji Nozato, Naoyuki Nagatani, Kensuke Tsumura, Kazuhiro Sawa
  • Publication number: 20130096247
    Abstract: Provided is a polyolefin-based resin composition capable of obtaining a molded product having a high modulus of elongation and a low coefficient of linear expansion. The polyolefin-based resin composition includes a polyolefin-based resin containing either one or both of an acid-modified polyolefin-based resin and a polyolefin-based resin with a hydroxyl group, and flaked graphite. The flaked graphite is uniformly dispersed in the polyolefin-based resin. As a result, a molded product formed by using the polyolefin-based resin composition has excellent mechanical strength such as a high modulus of elongation, a low coefficient of linear expansion, and high dimensional stability, and can be used for various applications such as a material that is suitable for use as the exterior panels of automobiles or a steel sheet replacement material.
    Type: Application
    Filed: June 16, 2011
    Publication date: April 18, 2013
    Applicant: SEKISUI CHEMICAL CO., LTD.
    Inventors: Katsunori Takahashi, Daisuke Mukohata, Mitsuru Naruta, Kouji Taniguchi, Naoyuki Nagatani, Shouji Nozato
  • Publication number: 20130034709
    Abstract: The present invention provides a resin composition which can be molded easily and from which can be obtained synthetic resin molded articles superior in mechanical strength such as modulus of tensile elasticity, appearance such as surface smoothness, and dimensional stability. Since the resin composition of the present invention is characterized by containing a synthetic resin and a flaked graphite that is a laminate of graphene sheets the number of which is 150 or less and that has an aspect ratio of 20 or more, it is superior in moldability and synthetic resin molded articles with desired shapes can be produced therefrom by a widely used molding method.
    Type: Application
    Filed: March 18, 2011
    Publication date: February 7, 2013
    Applicant: Sekisui Chemical Co., Ltd.
    Inventors: Katsunori Takahashi, Nobuhiko Inui, Naoyuki Nagatani, Daisuke Mukohata, Kouji Taniguchi, Mitsuru Naruta
  • Publication number: 20120128951
    Abstract: Provided is a resin laminated plate which can achieve weight reduction and further increase in strength and is less likely to degrade in surface appearance. A resin laminated plate 1 including a layer made of a thermoplastic resin or thermosetting resin in a laminated structure includes: a first layer 2 made of a thermoplastic resin or thermosetting resin having a tensile modulus of elasticity of 0.8 to 2.0 GPa; and a second layer 3 disposed on the first layer 2, made of a different resin from the thermoplastic resin or thermosetting resin forming the first layer 2, and having a form selected from the group consisting of a film, a woven fabric, a non-woven fabric, and a mesh, wherein the ratio between the thickness of the first layer and the thickness of the second layer is within the range of 0.5 to 10 and the apparent bending modulus of elasticity of the resin laminated plate determined by the bending test defined in Japanese Industrial Standards (JIS) K7171 is 2.5 GPa to 8.5 GPa, both inclusive.
    Type: Application
    Filed: September 17, 2010
    Publication date: May 24, 2012
    Inventors: Katsunori Takahashi, Daisuke Mukohata, Mitsuru Naruta, Kensuke Tsumura, Kazuhiro Sawa, Koji Taniguchi, Naoyuki Nagatani