Patents by Inventor Shusaku Mandai

Shusaku Mandai 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: 20210363411
    Abstract: A diverting agent of the present invention contains a polyvinyl alcohol-based resin, wherein when the diverting agent is added to a 0.48 mass % aqueous solution of guar gum to prepare a mixed solution having a concentration of 12 mass %, a dispersion liquid obtained by dispersing the mixed solution at 30° C.
    Type: Application
    Filed: August 9, 2021
    Publication date: November 25, 2021
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Shusaku MANDAI, Yasuhiro HIRANO, Ryosuke TANIGUCHI, Chizuko FURO, Kenji FURUI, Kenji SHINOHARA, Ken SATO
  • Patent number: 10807353
    Abstract: A laminate shaping support material is provided which includes one of: a resin composition containing a polyvinyl alcohol resin having a primary hydroxyl group at its side chain, and having a heat of fusion of 10 to 30 J/g at its melting point (Embodiment (X)); and a resin composition containing a polyvinyl alcohol resin, and a block copolymer including a polymer block of an aromatic vinyl compound, at least one of a polymer block of a conjugated diene compound and a block of a hydrogenated conjugated diene compound, and a functional group reactive with a hydroxyl group (Embodiment (Y)). Therefore, the laminate shaping support material according to Embodiment (X), for example, is excellent in shape stability and adhesiveness to a model material. The laminate shaping support material according to Embodiment (Y) is excellent in peelability and forming stability.
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: October 20, 2020
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Norihito Sakai, Shusaku Mandai
  • Patent number: 10632731
    Abstract: A laminate shaping support material is provided which includes one of: a resin composition containing a polyvinyl alcohol resin having a primary hydroxyl group at its side chain, and having a heat of fusion of 10 to 30 J/g at its melting point (Embodiment (X)); and a resin composition containing a polyvinyl alcohol resin, and a block copolymer including a polymer block of an aromatic vinyl compound, at least one of a polymer block of a conjugated diene compound and a block of a hydrogenated conjugated diene compound, and a functional group reactive with a hydroxyl group (Embodiment (Y)). Therefore, the laminate shaping support material according to Embodiment (X), for example, is excellent in shape stability and adhesiveness to a model material. The laminate shaping support material according to Embodiment (Y) is excellent in peelability and forming stability.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: April 28, 2020
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Norihito Sakai, Shusaku Mandai
  • Patent number: 10595528
    Abstract: Provided is a liquid spray agent for agricultural use, including a polyvinyl alcohol-based resin having a saponification degree of from 30 mol %, to 60 mol %. With this, a liquid spray agent for agricultural use, which is used in agricultural and horticultural fields and has high fixation ability and excellent sprayability, can be provided.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: March 24, 2020
    Assignee: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Chizuko Furo, Shusaku Mandai
  • Patent number: 10570327
    Abstract: An object of the present invention is to improve the water dispersibility of the PVA-based resin and also to suppress the swelling of the PVA-based resin. The object is achieved by organic-inorganic composite particles, which have an average particle size of preferably 1 ?m to 3,000 ?m, including a polyvinyl alcohol-based resin and a component having a three-dimensional siloxane crosslinked structure that is derived from a hydrolysis-polycondensation product of an alkoxysilane and/or a low condensate thereof, wherein the alkoxysilane includes a T unit and/or a Q unit as a structural unit (s), and a Si content with respect to a total weight of the composite particles is 0.1 wt % or more and 23 wt % or less in terms of SiO2.
    Type: Grant
    Filed: November 15, 2018
    Date of Patent: February 25, 2020
    Assignee: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Hanako Katou, Shouhei Hirase, Takumi Watanabe, Shoya Yoda, Shusaku Mandai
  • Patent number: 10550038
    Abstract: A cement admixture includes a crosslinked product of a modified polyvinyl alcohol-based resin, wherein the dissolution rate of 1 g of the crosslinked product of a modified polyvinyl alcohol-based resin for 1 liter of water at 70° C. is 50% or less.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: February 4, 2020
    Assignee: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Takahiro Saka, Chizuko Furo, Shusaku Mandai
  • Publication number: 20190344553
    Abstract: A laminate shaping support material is provided which includes one of: a resin composition containing a polyvinyl alcohol resin having a primary hydroxyl group at its side chain, and having a heat of fusion of 10 to 30 J/g at its melting point (Embodiment (X)); and a resin composition containing a polyvinyl alcohol resin, and a block copolymer including a polymer block of an aromatic vinyl compound, at least one of a polymer block of a conjugated diene compound and a block of a hydrogenated conjugated diene compound, and a functional group reactive with a hydroxyl group (Embodiment (Y)). Therefore, the laminate shaping support material according to Embodiment (X), for example, is excellent in shape stability and adhesiveness to a model material. The laminate shaping support material according to Embodiment (Y) is excellent in peelability and forming stability.
    Type: Application
    Filed: July 25, 2019
    Publication date: November 14, 2019
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Norihito SAKAI, Shusaku MANDAI
  • Publication number: 20190216081
    Abstract: A liquid spray agent for plants includes: a polyvinyl alcohol resin (A) having a saponification degree of from 30 mol % to 60 mol %; and an anionic surfactant (B). The liquid spray agent for plants has enhanced spreading property and stability as a spray agent.
    Type: Application
    Filed: March 25, 2019
    Publication date: July 18, 2019
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Satoshi IKUBO, Chizuko FURO, Shusaku MANDAI
  • Publication number: 20190193387
    Abstract: A laminate shaping support material is provided which includes one of: a resin composition containing a polyvinyl alcohol resin having a primary hydroxyl group at its side chain, and having a heat of fusion of 10 to 30 J/g at its melting point (Embodiment (X)); and a resin composition containing a polyvinyl alcohol resin, and a block copolymer including a polymer block of an aromatic vinyl compound, at least one of a polymer block of a conjugated diene compound and a block of a hydrogenated conjugated diene compound, and a functional group reactive with a hydroxyl group (Embodiment (Y)). Therefore, the laminate shaping support material according to Embodiment (X), for example, is excellent in shape stability and adhesiveness to a model material. The laminate shaping support material according to Embodiment (Y) is excellent in peelability and forming stability.
    Type: Application
    Filed: March 1, 2019
    Publication date: June 27, 2019
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Norihito SAKAI, Shusaku MANDAI
  • Publication number: 20190153290
    Abstract: An object of the present invention is to improve the water dispersibility of the PVA-based resin and also to suppress the swelling of the PVA-based resin. The object is achieved by organic-inorganic composite particles, which have an average particle size of preferably 1 ?m to 3,000 ?m, including a polyvinyl alcohol-based resin and a component having a three-dimensional siloxane crosslinked structure that is derived from a hydrolysis-polycondensation product of an alkoxysilane and/or a low condensate thereof, wherein the alkoxysilane includes a T unit and/or a Q unit as a structural unit (s), and a Si content with respect to a total weight of the composite particles is 0.1 wt % or more and 23 wt % or less in terms of SiO2.
    Type: Application
    Filed: November 15, 2018
    Publication date: May 23, 2019
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Hanako KATOU, Shouhei HIRASE, Takumi WATANABE, Shouya YODA, Shusaku MANDAI
  • Publication number: 20180362404
    Abstract: Conventional methods suffer from unsatisfactory performance of the dehydration-preventing agent at a high temperature, and the present invention provides a cement admixture exhibiting an excellent dehydration-preventing effect at a high temperature. The cement admixture of the present invention includes a crosslinked product of a modified polyvinyl alcohol-based resin, wherein the dissolution rate of 1 g of the crosslinked product of a modified polyvinyl alcohol-based resin for 1 liter of water at 70° C. is 50% or less.
    Type: Application
    Filed: December 6, 2016
    Publication date: December 20, 2018
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Takahiro SAKA, Chizuko FURO, Shusaku MANDAI
  • Patent number: 10111421
    Abstract: Disclosed is a dispersing agent for agrochemicals, said dispersing agent which comprises a modified polyvinyl alcohol-based resin containing a structural unit having a nonionic hydrophilicity group in side chain, and having a saponification degree of 95 mol % or more. The dispersing agent for agrochemicals can provide a dispersion in which a hardly water-soluble agrochemical active ingredient employed for a dispersoid is dispersed in a stable state even in the case where the dispersoid has a relatively large particle size.
    Type: Grant
    Filed: February 9, 2017
    Date of Patent: October 30, 2018
    Assignee: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Takahiro Saka, Chizuko Furo, Shusaku Mandai
  • Patent number: 10005945
    Abstract: A drilling fluid adjusting agent using a PVA-based resin capable of contributing to the reduction of hydration swelling of bentonite even in the presence of salts; and a drilling fluid using the same are provided. The drilling fluid adjusting agent contains a PVA containing 1,2-diol structural unit in a side chain thereof. The drilling fluid adjusting agent has excellent solubility even in the presence of salts such as potassium ion, and also has excellent reduction of hydration swelling of bentonite.
    Type: Grant
    Filed: December 26, 2014
    Date of Patent: June 26, 2018
    Assignee: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO.. LTD.
    Inventors: Shusaku Mandai, Hiroki Takeda
  • Patent number: 9809697
    Abstract: An object of the invention is to provide a crosslinking agent with which a crosslinked polymer that suffers little coloring with the lapse of time and shows excellent viscosity stability is obtained. The crosslinking agent of the invention includes a compound which contains two or more alkylhydrazide groups represented by the following general formula (1). (In formula (1), R1 represents an alkyl group having 1-10 carbon atoms, and symbol * is a linking bond.
    Type: Grant
    Filed: October 8, 2014
    Date of Patent: November 7, 2017
    Assignee: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Chizuko Furo, Taiji Kanda, Shusaku Mandai, Takeshi Kuroda
  • Publication number: 20170150713
    Abstract: Disclosed is a dispersing agent for agrochemicals, said dispersing agent which comprises a modified polyvinyl alcohol-based resin containing a structural unit having a nonionic hydrophilicity group in side chain, and having a saponification degree of 95 mol % or more. The dispersing agent for agrochemicals can provide a dispersion in which a hardly water-soluble agrochemical active ingredient employed for a dispersoid is dispersed in a stable state even in the case where the dispersoid has a relatively large particle size.
    Type: Application
    Filed: February 9, 2017
    Publication date: June 1, 2017
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Takahiro SAKA, Chizuko FURO, Shusaku MANDAI
  • Publication number: 20170087775
    Abstract: A laminate-shaping support material includes one of: a resin composition containing a polyvinyl alcohol resin having a primary hydroxyl group at its side chain, and having a heat of fusion of 10 to 30 J/g at its melting point (Embodiment (X)); and a resin composition containing a polyvinyl alcohol resin, and a block copolymer including a polymer block of an aromatic vinyl compound, at least one of a polymer block of a conjugated diene compound and a block of a hydrogenated conjugated diene compound, and a functional group reactive with a hydroxyl group (Embodiment (Y)). Therefore, the laminate shaping support material according to Embodiment (X), for example, is excellent in shape stability and adhesiveness to a model material. The laminate shaping support material according to Embodiment (Y) is excellent in peelability and forming stability.
    Type: Application
    Filed: May 28, 2015
    Publication date: March 30, 2017
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Norihito SAKAI, Shusaku MANDAI
  • Publication number: 20170037294
    Abstract: A drilling fluid adjusting agent using a PVA-based resin capable of contributing to the reduction of hydration swelling of bentonite even in the presence of salts; and a drilling fluid using the same are provided. The drilling fluid adjusting agent contains a PVA containing 1,2-diol structural unit in a side chain thereof. The drilling fluid adjusting agent has excellent solubility even in the presence of salts such as potassium ion, and also has excellent reduction of hydration swelling of bentonite.
    Type: Application
    Filed: December 26, 2014
    Publication date: February 9, 2017
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Shusaku Mandai, Hiroki Takeda
  • Publication number: 20160262381
    Abstract: Provided is a liquid spray agent for agricultural use, including a polyvinyl alcohol-based resin having a saponification degree of from 30 mol %, to 60 mol %. With this, a liquid spray agent for agricultural use, which is used in agricultural and horticultural fields and has high fixation ability and excellent sprayability, can be provided.
    Type: Application
    Filed: December 11, 2014
    Publication date: September 15, 2016
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Chizuko FURO, Shusaku MANDAI
  • Publication number: 20160237245
    Abstract: An object of the invention is to provide a crosslinking agent with which a crosslinked polymer that suffers little coloring with the lapse of time and shows excellent viscosity stability is obtained. The crosslinking agent of the invention includes a compound which contains two or more alkylhydrazide groups represented by the following general formula (1). (In formula (1), R1 represents an alkyl group having 1-10 carbon atoms, and symbol * is a linking bond.
    Type: Application
    Filed: October 8, 2014
    Publication date: August 18, 2016
    Applicant: THE NIPPON SYNTHETIC CHEMICAL INDUSTRY CO., LTD.
    Inventors: Chizuko FURO, Taiji KANDA, Shusaku MANDAI, Takeshi KURODA
  • Patent number: 8722822
    Abstract: This invention provides an aqueous emulsion, which comprises a polyvinyl alcohol-based resin, as the dispersant, and a polymer comprising a structural unit derived from an ethylenically unsaturated monomer, as the dispersoid, from which a film having excellent transparency can be obtained, and which is excellent in mechanical stability, chemical stability, freezing stability and storage stability, and a method for producing the same, and relates to an aqueous emulsion which has an average particle size of the dispersoid of from 100 to 450 ?m and an apparent grafting efficiency of the polyvinyl alcohol-based resin of from 65 to 75% based on the dispersoid, and a method for producing the same.
    Type: Grant
    Filed: November 26, 2008
    Date of Patent: May 13, 2014
    Assignee: The Nippon Synthetic Chemical Industry Co., Ltd.
    Inventors: Mitsuo Shibutani, Masahiro Saito, Shusaku Mandai, Takaaki Murahashi