Patents by Inventor Hiroyasu Nishida

Hiroyasu Nishida 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: 11267715
    Abstract: Aiming at providing a ceria-based composite particle dispersion capable of polishing silica film, Si wafer or even hard-to-process material at high polishing rate, and can give high surface accuracy, disclosed is a ceria-based composite particle dispersion that contains a ceria-based composite particle that has an average particle size of 50 to 350 nm, to solve the aforementioned problem, featured by that the ceria-based composite particle has a mother particle, a cerium-containing silica layer, a child particle, and an easily soluble silica-containing layer; the mother particle contains amorphous silica as a major ingredient; the child particle contains crystalline ceria as a major ingredient; ratio of the mass of the easily soluble silica-containing layer relative to the mass of the ceria-based composite particle falls in a specific range; mass ratio of silica and ceria in the ceria-based composite particle falls in a specific range; the ceria-based composite particle, when analyzed by X-ray diffractometry,
    Type: Grant
    Filed: May 23, 2018
    Date of Patent: March 8, 2022
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Michio Komatsu, Hiroyasu Nishida, Yuji Tawarazako, Shinya Usuda, Kazuhiro Nakayama
  • Patent number: 11059997
    Abstract: A polishing composition comprising an abrasive grain; a modified microfibril cellulose in which at least a part of the cellulose units has a hydroxyl group at the C6 position oxidized to a carboxyl group; and a dispersion medium, wherein each content of Na and K is 100 ppm or less relative to the solids weight.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: July 13, 2021
    Assignee: JGC CATALYSTS AND CHEMICALS LTD.
    Inventors: Michio Komatsu, Yukihiro Iwasaki, Hiroyasu Nishida, Yuji Tawarazako, Kazuhiro Nakayama
  • Publication number: 20200354225
    Abstract: Provided is a dispersion containing high-purity silica particles and a method for producing the same. A first solution containing a silane alkoxide and a second solution containing fine bubbles having an average bubble diameter of 40 nm to 10 ?m are mixed. Thus, the silane alkoxide is hydrolyzed without using an alkaline catalyst in a liquid phase containing the fine bubbles, so that uniform silica particles having an average particle size of 3 to 10 nm are produced. Further, hydrolysis is carried out by adding a hydrolyzable metal compound to the dispersion containing the silica particles in the presence of the fine bubbles and the alkaline catalyst. Thus, the silica particles are grown, so that a uniform silica-based particle dispersion containing particles having an average particle size of more than 10 nm and 300 nm or less is produced.
    Type: Application
    Filed: July 16, 2020
    Publication date: November 12, 2020
    Applicant: JGC CATALYSTS AND CHEMICALS LTD.
    Inventors: Michio KOMATSU, Hiroyasu NISHIDA
  • Patent number: 10759665
    Abstract: Provided is a dispersion containing high-purity silica particles and a method for producing the same. A first solution containing a silane alkoxide and a second solution containing fine bubbles having an average bubble diameter of 40 nm to 10 ?m are mixed. Thus, the silane alkoxide is hydrolyzed without using an alkaline catalyst in a liquid phase containing the fine bubbles, so that uniform silica particles having an average particle size of 3 to 10 nm are produced. Further, hydrolysis is carried out by adding a hydrolyzable metal compound to the dispersion containing the silica particles in the presence of the fine bubbles and the alkaline catalyst. Thus, the silica particles are grown, so that a uniform silica-based particle dispersion containing particles having an average particle size of more than 10 nm and 300 nm or less is produced.
    Type: Grant
    Filed: December 26, 2017
    Date of Patent: September 1, 2020
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Michio Komatsu, Hiroyasu Nishida
  • Publication number: 20200109312
    Abstract: An object of the present invention is to provide a nanobubble-containing inorganic oxide fine particle dispersion having excellent concentration stability in a process used as an abrasive. The object is achieved by the nanobubble-containing inorganic oxide fine particle dispersion including: inorganic oxide fine particles having an average particle size of 1 to 500 nm and containing fine particles containing Ce; and nanobubbles having an average cell size of 50 to 500 nm and being at least one non-oxidizing gas selected from a group consisting of N2 and H2.
    Type: Application
    Filed: May 21, 2018
    Publication date: April 9, 2020
    Applicant: JGC CATALYSTS AND CHEMICALS LTD.
    Inventors: Michio KOMATSU, Hiroyasu NISHIDA, Kazuhiro NAKAYAMA
  • Publication number: 20200087554
    Abstract: Aiming at providing a ceria-based composite particle dispersion capable of polishing silica film, Si wafer or even hard-to-process material at high polishing rate, and can give high surface accuracy, disclosed is a ceria-based composite particle dispersion that contains a ceria-based composite particle that has an average particle size of 50 to 350 nm, to solve the aforementioned problem, featured by that the ceria-based composite particle has a mother particle, a cerium-containing silica layer, a child particle, and an easily soluble silica-containing layer; the mother particle contains amorphous silica as a major ingredient; the child particle contains crystalline ceria as a major ingredient; ratio of the mass of the easily soluble silica-containing layer relative to the mass of the ceria-based composite particle falls in a specific range; mass ratio of silica and ceria in the ceria-based composite particle falls in a specific range; the ceria-based composite particle, when analyzed by X-ray diffractometry,
    Type: Application
    Filed: May 23, 2018
    Publication date: March 19, 2020
    Inventors: Michio Komatsu, Hiroyasu Nishida, Yuji Tawarazako, Shinya Usuda, Kazuhiro Nakayama
  • Publication number: 20190367777
    Abstract: A polishing composition comprising an abrasive grain; a modified microfibril cellulose in which at least a part of the cellulose units has a hydroxyl group at the C6 position oxidized to a carboxyl group; and a dispersion medium, wherein each content of Na and K is 100 ppm or less relative to the solids weight.
    Type: Application
    Filed: December 28, 2017
    Publication date: December 5, 2019
    Applicant: JGC CATALYSTS AND CHEMICALS LTD.
    Inventors: Michio KOMATSU, Yukihiro IWASAKI, Hiroyasu NISHIDA, Yuji TAWARAZAKO, Kazuhiro NAKAYAMA
  • Publication number: 20190345036
    Abstract: Provided is a dispersion containing high-purity silica particles and a method for producing the same. A first solution containing a silane alkoxide and a second solution containing fine bubbles having an average bubble diameter of 40 nm to 10 ?m are mixed. Thus, the silane alkoxide is hydrolyzed without using an alkaline catalyst in a liquid phase containing the fine bubbles, so that uniform silica particles having an average particle size of 3 to 10 nm are produced. Further, hydrolysis is carried out by adding a hydrolyzable metal compound to the dispersion containing the silica particles in the presence of the fine bubbles and the alkaline catalyst. Thus, the silica particles are grown, so that a uniform silica-based particle dispersion containing particles having an average particle size of more than 10 nm and 300 nm or less is produced.
    Type: Application
    Filed: December 26, 2017
    Publication date: November 14, 2019
    Applicant: JGC Catalysts and Chemicals Ltd.
    Inventors: Michio KOMATSU, Hiroyasu NISHIDA
  • Patent number: 10160894
    Abstract: Provided is a non-spherical silica sol containing non-spherical silica fine particles dispersed in a dispersion medium, the non-spherical silica fine particles having an average particle diameter in a range of 3 to 150 nm as measured by dynamic light scattering, a minor-diameter/major-diameter ratio in a range of 0.01 to 0.8, and a specific surface area in a range of 10 to 800 m2/g, and also having a plurality of wart-like projections on the surfaces thereof, and a process for producing the non-spherical silica sol. The non-spherical silica fine particles contained in the non-spherical silica sol have a unique structure different from the structure of ordinary non-spherical silica fine particles.
    Type: Grant
    Filed: November 20, 2015
    Date of Patent: December 25, 2018
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Hiroyasu Nishida, Kazuhiro Nakayama
  • Patent number: 9683108
    Abstract: There is provided an antireflective laminate having a low refractive index and excellent mechanical strength, which comprises a coating layer of an ionizing radiation curing-type resin composition comprising ionizing radiation curing group-containing hollow silica fine particles. The antireflective laminate comprises a light transparent base material and at least a low refractive index layer having a refractive index of not more than 1.45 provided on the light transparent base material, wherein the low refractive index layer comprises an ionizing radiation curing-type resin composition and silica fine particles having an outer shell layer with the interior of the silica fine particles being porous or void, and, for a part or all of the silica fine particles, at least a part of the surface of the silica fine particle has been treated with an ionizing radiation curing group-containing silane coupling agent.
    Type: Grant
    Filed: September 28, 2015
    Date of Patent: June 20, 2017
    Assignees: Dai Nippon Printing Co., Ltd., JGC Catalysts and Chemicals Ltd.
    Inventors: Utako Mizuno, Midori Nakajo, Seiji Shinohara, Toshio Yoshihara, Hiroyasu Nishida, Ryo Muraguchi, Masafumi Hirai
  • Patent number: 9441139
    Abstract: Provided are silica-based fine particle dispersion sols, processes for producing the sols, coating compositions containing the dispersion sol, curable coating films obtained from the coating composition, and substrates having the coating film. The process including (1) mixing an aqueous aluminate solution to an alkaline silica sol which contains water-dispersible silica fine particles in a given ratio; (2) heating the mixture liquid obtained in step (1) to 60 to 200° C. and stirring the mixture liquid at the temperature for 0.5 to 20 hours; and (3) contacting the mixture liquid obtained in step (2) with a cation exchange resin to remove by ion exchange alkali metal ions contained in the mixture liquid and thereby controlling the pH of the mixture liquid to be in the range of 3.0 to 6.0.
    Type: Grant
    Filed: April 21, 2015
    Date of Patent: September 13, 2016
    Assignee: JGC CATALYSTS AND CHEMICALS LTD.
    Inventors: Yoichi Ishihara, Hiroyasu Nishida
  • Publication number: 20160186030
    Abstract: Provided is a non-spherical silica sol containing non-spherical silica fine particles dispersed in a dispersion medium, the non-spherical silica fine particles having an average particle diameter in a range of 3 to 150 nm as measured by dynamic light scattering, a minor-diameter/major-diameter ratio in a range of 0.01 to 0.8, and a specific surface area in a range of 10 to 800 m2/g, and also having a plurality of wart-like projections on the surfaces thereof, and a process for producing the non-spherical silica sol. The non-spherical silica fine particles contained in the non-spherical silica sol have a unique structure different from the structure of ordinary non-spherical silica fine particles.
    Type: Application
    Filed: November 20, 2015
    Publication date: June 30, 2016
    Inventors: Hiroyasu Nishida, Kazuhiro Nakayama
  • Patent number: 9272916
    Abstract: Provided is a non-spherical silica sol containing non-spherical silica fine particles dispersed in a dispersion medium, the non-spherical silica fine particles having an average particle diameter in a range of 3 to 150 nm as measured by dynamic light scattering, a minor-diameter/major-diameter ratio in a range of 0.01 to 0.8, and a specific surface area in a range of 10 to 800 m2/g, and also having a plurality of wart-like projections on the surfaces thereof, and a process for producing the non-spherical silica sol. The non-spherical silica fine particles contained in the non-spherical silica sol have a unique structure different from the structure of ordinary non-spherical silica fine particles.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: March 1, 2016
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Hiroyasu Nishida, Kazuhiro Nakayama
  • Publication number: 20160017152
    Abstract: There is provided an antireflective laminate having a low refractive index and excellent mechanical strength, which comprises a coating layer of an ionizing radiation curing-type resin composition comprising ionizing radiation curing group-containing hollow silica fine particles. The antireflective laminate comprises a light transparent base material and at least a low refractive index layer having a refractive index of not more than 1.45 provided on the light transparent base material, wherein the low refractive index layer comprises an ionizing radiation curing-type resin composition and silica fine particles having an outer shell layer with the interior of the silica fine particles being porous or void, and, for a part or all of the silica fine particles, at least a part of the surface of the silica fine particle has been treated with an ionizing radiation curing group-containing silane coupling agent.
    Type: Application
    Filed: September 28, 2015
    Publication date: January 21, 2016
    Inventors: Utako MIZUNO, Midori NAKAJO, Seiji SHINOHARA, Toshio YOSHIHARA, Hiroyasu NISHIDA, Ryo MURAGUCHI, Masafumi HIRAI
  • Publication number: 20150225609
    Abstract: Provided are silica-based fine particle dispersion sols, processes for producing the sols, coating compositions containing the dispersion sol, curable coating films obtained from the coating composition, and substrates having the coating film. The process including (1) mixing an aqueous aluminate solution to an alkaline silica sol which contains water-dispersible silica fine particles in a given ratio; (2) heating the mixture liquid obtained in step (1) to 60 to 200° C. and stirring the mixture liquid at the temperature for 0.5 to 20 hours; and (3) contacting the mixture liquid obtained in step (2) with a cation exchange resin to remove by ion exchange alkali metal ions contained in the mixture liquid and thereby controlling the pH of the mixture liquid to be in the range of 3.0 to 6.0.
    Type: Application
    Filed: April 21, 2015
    Publication date: August 13, 2015
    Inventors: Yoichi Ishihara, Hiroyasu Nishida
  • Patent number: 9039828
    Abstract: Provided are silica-based fine particle dispersion sols, processes for producing the sols, coating compositions containing the dispersion sol, curable coating films obtained from the coating composition, and substrates having the coating film. A process includes (1) mixing an aqueous aluminate solution to an alkaline silica sol which contains water-dispersible silica fine particles in a given ratio; (2) heating the mixture liquid obtained in the step (1) to 60 to 200° C. and stirring the mixture liquid at the temperature for 0.5 to 20 hours; and (3) contacting the mixture liquid obtained in the step (2) with a cation exchange resin to remove by ion exchange alkali metal ions contained in the mixture liquid and thereby controlling the pH of the mixture liquid to be in the range of 3.0 to 6.0.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: May 26, 2015
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Yoichi Ishihara, Hiroyasu Nishida
  • Patent number: 8585791
    Abstract: In producing nodular silica sol, a polymerized silicic acid solution with viscosity of silicic acid from 0.9 to 100 mPa·s is prepared by aging a silicic acid solution with pH from 1.0 to 7.0 and silica concentration from 0.05 to 3.0% by weight at a temperature from 1 to 98° C. Then, a seed liquid is prepared by adding an alkali to the polymerized solution to adjust the pH from 10 to 12.5 and heating the resultant mixture solution at a temperature from 50 to 150° C. According to necessity, an alkali is added to the obtained seed liquid to adjust the pH in from 9 to 12.5. Finally, a silicic acid solution or a highly purified silicic acid solution is dropped to the seed liquid at a temperature from 20 to 98° C. continuously or intermittently for building up.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: November 19, 2013
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Kazuhiro Nakayama, Akira Nakashima, Hiroyasu Nishida, Yoshinori Wakamiya
  • Patent number: 8187351
    Abstract: The present invention provides a sol of spinous inorganic oxide particles not containing coarse particles, in which particles having extremely homogeneous particles are dispersed in a solvent. An acidic silicic acid is added to a dispersion liquid of core particles to grow core particles, and then again the acidic silicic acid is added at the addition rate 1.2 to 1.8 higher than that in the previous step to prepare a sol of spinous inorganic oxide particles. Then the sol is subjected to centrifugation to remove coarse particles having the diameter of 800 nm or more, thus spinous inorganic oxide particles having peculiar form such as a spinous one being obtained.
    Type: Grant
    Filed: November 29, 2007
    Date of Patent: May 29, 2012
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Kazuhiro Nakayama, Mami Tokunaga, Akira Nakashima, Kazuaki Inoue, Osamu Yoshida, Yoshinori Wakamiya, Hiroyasu Nishida
  • Publication number: 20120103231
    Abstract: Provided are silica-based fine particle dispersion sols, processes for producing the sols, coating compositions containing the dispersion sol, curable coating films obtained from the coating composition, and substrates having the coating film. A process includes (1) mixing an aqueous aluminate solution to an alkaline silica sol which contains water-dispersible silica fine particles in a given ratio; (2) heating the mixture liquid obtained in the step (1) to 60 to 200° C. and stirring the mixture liquid at the temperature for 0.5 to 20 hours; and (3) contacting the mixture liquid obtained in the step (2) with a cation exchange resin to remove by ion exchange alkali metal ions contained in the mixture liquid and thereby controlling the pH of the mixture liquid to be in the range of 3.0 to 6.0.
    Type: Application
    Filed: June 15, 2010
    Publication date: May 3, 2012
    Applicant: JGC CATALYSTS AND CHEMICALS LTD.
    Inventors: Yoichi Ishihara, Hiroyasu Nishida
  • Patent number: 8118898
    Abstract: The present invention provides a sol of spinous silica-based particles in which silica-based particles having peculiar forms, spinous forms are dispersed in a solvent. The spinous silica-based particles have verrucous projections formed on surfaces of spherical silica-based particles. In the spinous particles, a value of the surface roughness (SA1/SA2, SA1 indicating a specific surface area measured by the BET method or the Sears method and SA2 indicating a specific surface area converted from an average particle diameter (D2) measured by the image analysis method) is in the range from 1.7 to 10. Furthermore the average diameter (D2) measured by the image analysis method is in the range from 7 to 150 nm.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: February 21, 2012
    Assignee: JGC Catalysts and Chemicals Ltd.
    Inventors: Yoshinori Wakamiya, Hiroyasu Nishida, Yuji Tawarazako, Kazuaki Inoue, Osamu Yoshida, Akira Nakashima