Patents by Inventor Hisashi Miyama

Hisashi Miyama 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: 20200377670
    Abstract: A polysiloxane-polyalkylene glycol block copolymer is obtained by reacting a polysiloxane (A) having any functional group selected from a carboxylic anhydride group, a hydroxyl group, an epoxy group, a carboxyl group, and an amino group with a polyalkylene glycol (B) having any functional group selected from a carboxylic anhydride group, a hydroxyl group, a carboxyl group, an amino group, an epoxy group, a thiol group, and an isocyanate group, wherein a content of a structure derived from the polysiloxane (A) is 20% by mass or more and 90% by mass or less with respect to 100% by mass of the polysiloxane-polyalkylene glycol block copolymer.
    Type: Application
    Filed: May 24, 2018
    Publication date: December 3, 2020
    Inventors: Hiroko Tanaka, Yuka Isago, Itaru Asano, Hiroshi Takezaki, Hisashi Miyama, Shiro Honda
  • Publication number: 20200354528
    Abstract: A polyarylene sulfide resin particulate has a mean particle diameter from more than 1 ?m to 100 the uniformity is 4 or less, the melt viscosity measured at temperature of 300° C. and shear rate of 1216 sec?1 is 150 to 500 Pa·s, and the recrystallization temperature, defined as temperature of the heat generation peak at the time of crystallization when cooled from 340° C. to 50° C. at 20° C./min using a differential scanning calorimeter, is 150 to 210° C. The polyarylene sulfide resin particulate is suitable as a material powder for producing a three-dimensional molding by a powder sintering three-dimensional printer can be provided efficiently.
    Type: Application
    Filed: January 17, 2017
    Publication date: November 12, 2020
    Inventors: Kei Watanabe, Kazusada TAKEDA, Hisashi MIYAMA, Mikiya NISHIDA
  • Publication number: 20200062892
    Abstract: A method produces polybutylene terephthalate resin particles, which includes (a) a step of heating a polybutylene terephthalate resin in an organic solvent to obtain a solution of a polybutylene terephthalate resin (dissolution step), and (b) a step of flash-cooling the solution to precipitate polybutylene terephthalate resin particles (precipitation step). The method produces PBT resin particles by a simple operation that can be performed industrially.
    Type: Application
    Filed: November 13, 2017
    Publication date: February 27, 2020
    Inventors: Chizuru Asahara, Koya Ito, Toshiya Takahashi, Kei Makita, Hisashi Miyama
  • Publication number: 20200055234
    Abstract: A polyarylene sulfide resin powder granular article mixture enabling production of a highly heat-resistant and high-ductility three-dimensional molded article has: 5-25 parts by weight of fluorine resin powder granular article with respect to 100 parts by weight of polyarylene sulfide resin powder granular article; an average particle size of greater than 1 ?m to 100 ?m or less; an angle of repose of 43 degrees or less; and a homogeneity of 4 or less.
    Type: Application
    Filed: October 13, 2017
    Publication date: February 20, 2020
    Inventors: Kei Watanabe, Kazusada Takeda, Hisashi Miyama, Mikiya Nishida, Hikaru Shibata
  • Publication number: 20200040204
    Abstract: A method of producing polybutylene terephthalate resin shaped moldings includes supplying a 3D printer with a polybutylene terephthalate resin powder mixture that contains 100 parts by weight of a polybutylene terephthalate resin powder material having a mean diameter of more than 1 ?m and 100 ?m or less, a uniformity coefficient of 4 or less, and a terminal carboxyl group quantity of 35 eq/t or more and 50 eq/t or less, and 0.1 to 5 parts by weight of inorganic particles having a mean diameter of 20 to 500 nm.
    Type: Application
    Filed: October 2, 2019
    Publication date: February 6, 2020
    Inventors: Kei Watanabe, Kazusada Takeda, Yosuke Nishimura, Hiroshi Takezaki, Hisashi Miyama, Mikiya Nishida
  • Publication number: 20180338927
    Abstract: In a system where phase separation into two phases occurs when an ether cellulose derivative (A), a polymer (B) different from the ether cellulose derivative (A), and an alcohol solvent (C) are mixed together, the two phases including a solution phase mainly containing the ether cellulose derivative (A) and a solution phase mainly containing the polymer (B), the two separated phases containing approximately the same solvent, an emulsion is formed and brought into contact with a poor solvent (D) to provide an ether cellulose derivative microparticle having an average particle diameter of 1 to 1,000 ?m, a linseed oil absorption of 50 to 1,000 mL/100 g, and an average surface pore size of 0.05 to 5 ?m.
    Type: Application
    Filed: October 26, 2016
    Publication date: November 29, 2018
    Inventors: Takahiko Otsubo, Kotoe Ohta, Yuji Echigo, Hiroshi Takezaki, Suguru Takaki, Satoshi Minakami, Akinori Ito, Hisashi Miyama
  • Publication number: 20180186926
    Abstract: A polyester resin powder mixture has a small average particle size, excellent powder flowability, and high strength after molding. The polyester resin powder mixture is obtained by blending 0.1-5 parts by weight of silica microparticles having an average particle size of 20-500 nm in 100 parts by weight of a polyester resin powder having an average particle size that is over 1 ?m and is less than or equal to 100 ?m, and that has a uniformity of 4 or less.
    Type: Application
    Filed: April 27, 2016
    Publication date: July 5, 2018
    Inventors: Kei Watanabe, Kazusada Takeda, Yosuke Nishimura, Hiroshi Takezaki, Hisashi Miyama, Mikiya Nishida
  • Publication number: 20180105669
    Abstract: Carbon-black-encapsulated polyamide microparticles are obtained by bringing a poor solvent of polyamide into contact with an emulsion to cause carbon-black-encapsulated polyamide to be precipitated, the emulsion being formed in a system that has separated into two solution phases when carbon black is mixed with a polymer solution prepared by dissolving a polyamide, a polymer (B) different from the polyamide, and an organic solvent (C), the polymer (B) being the main component in one of the phases, and, in the other of the phases, the polyamide being the main component and the carbon black being selectively distributed; wherein it is possible to obtain black polyamide microparticles having a number-average particle size of 1-200 ?m and a temperature difference between the melting temperature and the cooling crystallization temperature of 25° C. or more, the microparticles being suitable for use in powder bed fusion additive manufacturing.
    Type: Application
    Filed: December 9, 2015
    Publication date: April 19, 2018
    Inventors: Takahiko Otsubo, Hisashi Miyama, Hiroshi Takezaki