Patents by Inventor Nobuyuki Otozawa

Nobuyuki Otozawa 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: 20220144994
    Abstract: To provide a method for surface modification of a fluororesin, that enables graft polymerization at a lower temperature than a conventional method. A method for surface modification of a fluororesin, which comprises reacting a fluororesin with a radical reactive compound in the presence of an organometallic compound.
    Type: Application
    Filed: January 21, 2022
    Publication date: May 12, 2022
    Applicant: AGC Inc.
    Inventors: Ryuichi SUGIMOTO, Taiki HOSHINO, Eisuke MUROTANI, Nobuyuki OTOZAWA
  • Patent number: 10975053
    Abstract: The present invention relates to a method for producing a 1,3-dioxolane compound represented by formula 1, the method containing step (a), in which hexafluoroacetone monohydrate is brought into contact with a metal fluoride, step (b), in which fluorine gas is brought into contact, and step (c), in which an olefin compound represented by formula 2 is brought into contact. In formulae 1 and 2, X1 to X4 each independently represent a hydrogen atom, fluorine atom, chlorine atom, or trifluoromethyl group.
    Type: Grant
    Filed: July 23, 2020
    Date of Patent: April 13, 2021
    Assignee: AGC INC.
    Inventors: Daisuke Jomuta, Yusuke Takahira, Nobuyuki Otozawa, Chikaya Tamitsuji
  • Publication number: 20200354332
    Abstract: The present invention relates to a method for producing a 1,3-dioxolane compound represented by formula 1, the method containing step (a), in which hexafluoroacetone monohydrate is brought into contact with a metal fluoride, step (b), in which fluorine gas is brought into contact, and step (c), in which an olefin compound represented by formula 2 is brought into contact. In formulae 1 and 2, X1 to X4 each independently represent a hydrogen atom, fluorine atom, chlorine atom, or trifluoromethyl group.
    Type: Application
    Filed: July 23, 2020
    Publication date: November 12, 2020
    Applicant: AGC Inc.
    Inventors: Daisuke JOMUTA, Yusuke TAKAHIRA, Nobuyuki OTOZAWA, Chikaya TAMITSUJI
  • Patent number: 9969890
    Abstract: Provided is a fluorinated ether compound capable of imparting excellent antifouling properties such as oil-based ink repellency, fingerprint stain removability, to a hard coating layer; a composition for forming a hard coating layer, and an article having an antifouling hard coating layer formed from the composition. The fluorinated ether compound has either a poly(oxyperfluoroalkylene) chain having a repeated unit that includes a C1-2 oxyperfluoroalkylene group and a C3-6 oxyperfluoroalkylene group, bonded to each other, or a poly(oxyperfluoroalkylene) chain having a repeated unit that contains a C4 oxyperfluoroalkylene group and a different oxyperfluoroalkylene group, bonded to each other, a linking group bonded to a first terminal of the poly(oxyperfluoroalkylene) chain, and at least one (meth)acryloyl group bonded to the linking group.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: May 15, 2018
    Assignee: Asahi Glass Company, Limited
    Inventors: Kiyotaka Takao, Nobuyuki Otozawa, Daisuke Jomuta, Kuniko Okano, Taiki Hoshino
  • Patent number: 9637650
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid, whereby it is possible to form a surface-treated layer which has high initial water/oil repellency and which is excellent in abrasion resistance and fingerprint stain removability, and a substrate having a surface-treated layer and a method for its production. A fluorinated ether compound which has a poly(oxyperfluoroalkylene) chain (??) having a C4 oxyperfluoroalkylene unit (?) and an oxyperfluoroalkylene unit (?) other than the unit (?) and which has a hydrolysable silyl group on at least one terminal of the poly(oxyperfluoroalkylene) chain (??) via a linking group.
    Type: Grant
    Filed: June 6, 2014
    Date of Patent: May 2, 2017
    Assignee: Asahi Glass Company, Limited
    Inventors: Eisuke Murotani, Taiki Hoshino, Akira Isobe, Daisuke Shirakawa, Daisuke Jomuta, Nobuyuki Otozawa
  • Patent number: 9587119
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid, capable of forming a surface layer which has high initial water/oil repellency and which is excellent in abrasion resistance, fingerprint stain removability, lubricity and uniformity, as well as a substrate having such a surface layer, and a method for its production. A substrate having a surface layer formed of a fluorinated ether compound represented by D1-Rf1—O—CH2—(CmF2mO)n-A (D1 is CF3— or CF3—O—; Rf1 is a C1-20 fluoroalkylene group containing at least one hydrogen atom, etc.; m is 1 to 6; n is 1 to 200; A is —CaF2a—B—CbH2b—SiLcR3-c; B is —CgH2gO—, —ChH2hO—C(?O)NH—, etc.; L is a hydrolysable group; R is a monovalent hydrocarbon group, etc.; a is 1 to 5; b is 1 to 10; c is 1 to 3; g is 1 to 5; and h is 1 to 5) or a fluorinated ether composition containing the compound; and a method for its production.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: March 7, 2017
    Assignee: Asahi Glass Company, Limited
    Inventors: Taiki Hoshino, Nobuyuki Otozawa
  • Patent number: 9540404
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid, whereby it is possible to form a surface-treated layer which has high initial water/oil repellency and which is excellent in abrasion resistance and fingerprint stain removability, and a substrate having a surface-treated layer and a method for its production. A fluorinated ether compound which has a poly(oxyperfluoroalkylene) chain ((??)n) made of at least two units (??) linked to one another, and which has a hydrolysable silyl group on at least one terminal of the chain ((??)n) via a linking group, wherein each unit (??) is a poly(oxyperfluoroalkylene) group comprising one to three groups (?) made of at least one type of a C1-2 oxyperfluoroalkylene group and one to three groups (?) made of at least one type of a C3-6 oxyperfluoroalkylene group.
    Type: Grant
    Filed: June 23, 2014
    Date of Patent: January 10, 2017
    Assignee: Asahi Glass Company, Limited
    Inventors: Eisuke Murotani, Taiki Hoshino, Akinobu Kunimoto, Daisuke Jomuta, Nobuyuki Otozawa
  • Publication number: 20160009929
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid, capable of forming a surface layer which has high initial water/oil repellency and which is excellent in abrasion resistance, fingerprint stain removability, lubricity and uniformity, as well as a substrate having such a surface layer, and a method for its production. A substrate having a surface layer formed of a fluorinated ether compound represented by D1-Rf1—O—CH2—(CmF2mO)n-A (D1 is CF3— or CF3—O—; Rf1 is a C1-20 fluoroalkylene group containing at least one hydrogen atom, etc.; m is 1 to 6; n is 1 to 200; A is —CaF2a—B—CbH2b—SiLcR3-c; B is —CgH2gO—, —ChH2hO—C(?O)NH—, etc.; L is a hydrolysable group; R is a monovalent hydrocarbon group, etc.; a is 1 to 5; b is 1 to 10; c is 1 to 3; g is 1 to 5; and h is 1 to 5) or a fluorinated ether composition containing the compound; and a method for its production.
    Type: Application
    Filed: September 23, 2015
    Publication date: January 14, 2016
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Taiki HOSHINO, Nobuyuki OTOZAWA
  • Publication number: 20150344703
    Abstract: To provide a fluorinated ether compound capable of imparting excellent antifouling properties (oil-based ink repellency, fingerprint stain removability) to a hard coating layer, etc., a composition for forming a hard coating layer, containing such a compound, and an article having an antifouling hard coating layer formed from such a composition.
    Type: Application
    Filed: August 10, 2015
    Publication date: December 3, 2015
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Kiyotaka TAKAO, Nobuyuki Otozawa, Daisuke Jomuta, Kuniko Okano, Taiki Hoshino
  • Patent number: 8901264
    Abstract: To provide a copolymer which can impart sufficient dynamic water repellency, after air-drying water repellency and friction durability to a surface of an article, and which has low impact on the environment, a method for producing the same, a water repellent composition and an article excellent in dynamic water repellency, after air-drying water repellency and friction durability.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: December 2, 2014
    Assignee: Asahi Glass Company, Limited
    Inventors: Kazunori Sugiyama, Toyomichi Shimada, Nobuyuki Otozawa, Yuuichi Oomori, Minako Shimada
  • Publication number: 20140343206
    Abstract: To provide a fluorinated copolymer and a water/oil repellent composition, whereby adequate water/oil repellency and excellent dynamic water repellency are obtainable and environmental impact is low. A fluorinated copolymer comprising units (A1) derived from a macromonomer wherein the average polymerization degree of e.g. 2-perfluorohexylethyl acrylate is from 20 to 30, and units (B) derived from a monomer (b) which has no fluoroalkyl group and no cross-linkable functional group and of which the glass transition temperature, when formed into a homopolymer, is from 50 to 150° C., wherein the average polymerization degree of the macromonomer per one molecule of the fluorinated copolymer is at least 1, and a water/oil repellent composition containing such a fluorinated copolymer.
    Type: Application
    Filed: July 31, 2014
    Publication date: November 20, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Miyako SASAKI, Taiki Hoshino, Nobuyuki Otozawa
  • Publication number: 20140343207
    Abstract: To provide a fluorinated copolymer and a water/oil repellent composition having adequate water/oil repellency, excellent washing durability and low environmental impact. A fluorinated copolymer comprising units (A) derived from a macromonomer (a) which has, on average, at least two units (X) derived from 2-perfluorohexylethyl (meta)acrylate or the like, units (B) derived from a monomer (b) which has no fluoroalkyl group and no cross-linkable functional group and of which the glass transition temperature, when formed into a homopolymer, is from 50 to 150° C., and units (C) derived from a monomer (c) which has a cross-linkable functional group and no fluoroalkyl group, and a water/oil repellent composition containing such a fluorinated copolymer.
    Type: Application
    Filed: July 31, 2014
    Publication date: November 20, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Miyako SASAKI, Taiki HOSHINO, Nobuyuki OTOZAWA
  • Publication number: 20140302332
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid, whereby it is possible to form a surface-treated layer which has high initial water/oil repellency and which is excellent in abrasion resistance and fingerprint stain removability, and a substrate having a surface-treated layer and a method for its production. A fluorinated ether compound which has a poly(oxyperfluoroalkylene) chain ((??)n) made of at least two units (??) linked to one another, and which has a hydrolysable silyl group on at least one terminal of the chain ((??)n) via a linking group, wherein each unit (??) is a poly(oxyperfluoroalkylene) group comprising one to three groups (?) made of at least one type of a C1-2 oxyperfluoroalkylene group and one to three groups (?) made of at least one type of a C3-6 oxyperfluoroalkylene group.
    Type: Application
    Filed: June 23, 2014
    Publication date: October 9, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Eisuke MUROTANI, Taiki Hoshino, Akinobu Kunimoto, Daisuke Jomuta, Nobuyuki Otozawa
  • Publication number: 20140287240
    Abstract: To provide a fluorinated ether compound, a fluorinated ether composition and a coating liquid, whereby it is possible to form a surface-treated layer which has high initial water/oil repellency and which is excellent in abrasion resistance and fingerprint stain removability, and a substrate having a surface-treated layer and a method for its production. A fluorinated ether compound which has a poly(oxyperfluoroalkylene) chain (??) having a C4 oxyperfluoroalkylene unit (?) and an oxyperfluoroalkylene unit (?) other than the unit (?) and which has a hydrolysable silyl group on at least one terminal of the poly(oxyperfluoroalkylene) chain (??) via a linking group.
    Type: Application
    Filed: June 6, 2014
    Publication date: September 25, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Eisuke MUROTANI, Taiki Hoshino, Akira Isobe, Daisuke Shirakawa, Daisuke Jomuta, Nobuyuki Otozawa
  • Publication number: 20140171593
    Abstract: A fluorinated block copolymer having Rf groups with at most 6 carbon atoms, and a surface treatment agent containing such a copolymer, whereby a coating film excellent in both static liquid repellency and dynamic liquid repellency can be formed. The fluorinated block copolymer comprises a fluorinated moiety (A) having units (a) derived from a specific fluorinated monomer and a non-fluorinated moiety (B) having units (b) derived from a non-fluorinated monomer, wherein to all units, the proportion of the above units (a) is from 15 to 40 mol %, and the proportion of the above units (b) is from 60 to 85 mol %; a process for its production; and a surface treatment agent containing the fluorinated block copolymer.
    Type: Application
    Filed: February 24, 2014
    Publication date: June 19, 2014
    Applicant: Asahi Glass Company, Limited
    Inventors: Takashi SASAKI, Taiki Hoshino, Miyako Sasaki, Nobuyuki Otozawa
  • Publication number: 20130283744
    Abstract: To provide an oil repellent waterproof air-permeable filter of which environmental burden is small and which has an excellent liquid repellency to ketone solvents and ester solvents, and its production process. An oil repellent waterproof air-permeable filter comprising a substrate having a continuous porous structure and a coating material covering the substrate and containing a fluoropolymer having a perfluoroalkyl group, wherein the fluoropolymer has constituent units based on an acrylate having a chlorine atom at an ? position and a C1-6 perfluoroalkyl group, and the proportion of said constituent units is from 40 to 100 mass % in the total constituent units. A process for producing an oil repellent waterproof air-permeable filter, treating the substrate with an oil repellent waterproof composition containing a medium and the coating material and removing the medium.
    Type: Application
    Filed: June 24, 2013
    Publication date: October 31, 2013
    Inventors: Masahiko NAKAMURA, Nobuyuki Otozawa, Akihiko Asakawa, Hiroshi Manabe
  • Patent number: 8338529
    Abstract: To provide an oil repellent copolymer capable of forming an oil repellent film which is excellent in durability. An oil repellent copolymer characterized by comprising a repeating unit (A) having a polyfluoroalkyl group, a repeating unit (B) having a fluorescent functional group, and a repeating unit (C) having an ester bond other than an ester bond derived from acrylic acid, and/or a hydroxyl group.
    Type: Grant
    Filed: July 8, 2009
    Date of Patent: December 25, 2012
    Assignee: Asahi Glass Company, Limited
    Inventors: Taiki Hoshino, Naoko Shirota, Nobuyuki Otozawa, Akihiko Asakawa
  • Patent number: 8193277
    Abstract: To provide a water/oil repellent composition which is capable of imparting sufficient dynamic water repellency and post-air-drying water repellency to the surface of an article and which presents a low environmental impact, a method for its production and a method for treating an article. A water/oil repellent composition which comprises a copolymer having structural units based on the following monomer (a) and structural units based on the following monomer (b) and having a mass average molecular weight of at least 40,000, and a medium, is used. Monomer (a): a compound represented by (Z—Y)nX, wherein Z is a C1-6 polyfluoroalkyl group or the like, Y is a bivalent organic group or the like, n is 1 or 2, and X is a polymerizable unsaturated group. Monomer (b): an olefin, a homopolymer of which has a glass transition temperature of from ?50° C. to 50° C.
    Type: Grant
    Filed: October 21, 2011
    Date of Patent: June 5, 2012
    Assignee: Asahi Glass Company, Limited
    Inventors: Nobuyuki Otozawa, Kazunori Sugiyama, Minako Shimada, Yuuichi Oomori
  • Publication number: 20120097882
    Abstract: A water/oil repellent composition which imparts sufficient dynamic water repellency and post-air-drying water repellency to a surface of an article and has a low environmental impact; a method for producing the composition; and a method of treating an article. The water/oil repellent composition contains: a copolymer which has a mass average molecular weight of at least 40,000 and includes structural units based on monomer (a), monomer (b), and monomer (c); and a medium. Monomer (a) is a compound represented by (Z—Y)nX, wherein Z is a C1-6 polyfluoroalkyl group, Y is a bivalent organic group, n is 1 or 2, and X is a polymerizable unsaturated group. Monomer (b) is an olefin, a homopolymer of which has a glass transition temperature of at most 50° C. Monomer (c) is a (meth)acrylate having no polyfluoroalkyl group and having a C12-30 alkyl group.
    Type: Application
    Filed: December 5, 2011
    Publication date: April 26, 2012
    Applicant: Asahi Glass Company, Limited
    Inventors: Nobuyuki OTOZAWA, Kazunori SUGIYAMA, Minako SHIMADA, Yuuichi OOMORI
  • Publication number: 20120037835
    Abstract: To provide a water/oil repellent composition which is capable of imparting sufficient dynamic water repellency and post-air-drying water repellency to the surface of an article and which presents a low environmental impact, a method for its production and a method for treating an article. A water/oil repellent composition which comprises a copolymer having structural units based on the following monomer (a) and structural units based on the following monomer (b) and having a mass average molecular weight of at least 40,000, and a medium, is used. Monomer (a): a compound represented by (Z—Y)nX, wherein Z is a C1-6 polyfluoroalkyl group or the like, Y is a bivalent organic group or the like, n is 1 or 2, and X is a polymerizable unsaturated group. Monomer (b): an olefin, a homopolymer of which has a glass transition temperature of from ?50° C. to 50° C.
    Type: Application
    Filed: October 21, 2011
    Publication date: February 16, 2012
    Applicant: Asahi Glass Company, Limited
    Inventors: Nobuyuki OTOZAWA, Kazunori SUGIYAMA, Minako SHIMADA, Yuuichi OOMORI