Patents by Inventor Chitoshi Suzuki

Chitoshi Suzuki 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: 20210371574
    Abstract: To provide a polyurethane prepolymer whereby a pressure-sensitive adhesive having excellent moisture permeability and also having both low adhesion to skin and high adhesion to a substrate can be obtained, a pressure-sensitive adhesive, an adhesive skin patch, a pressure-sensitive adhesive tape, a wearable device and a wearable device kit. A hydroxy group-terminated polyurethane prepolymer which is obtained by reacting an oxyalkylene polymer A having an average number of hydroxy groups per molecule of from 2.1 to 3, an oxyalkylene polymer B having one hydroxy group per molecule, and a diisocyanate compound, wherein the number average molecular weight of the oxyalkylene polymer B is at least 5,000, and the content of ethylene oxide units in the hydroxy group-terminated polyurethane prepolymer is more than 10 mass %, a pressure-sensitive adhesive, an adhesive skin patch, a pressure-sensitive adhesive tape, a wearable device and a wearable device kit.
    Type: Application
    Filed: August 11, 2021
    Publication date: December 2, 2021
    Applicant: AGC Inc.
    Inventors: Makito NAKAMURA, Haru KAWASAKI, Hitoshi SHIMOMA, Chitoshi SUZUKI, Hiroshi WADA
  • Patent number: 9676897
    Abstract: To suppress deterioration of mechanical properties of a foam, by using a polyol system solution stored. A polyol system solution is prepared by using a polyether polyol (A1) having a hydroxy value of from 5 to 45 mgKOH/g and an average number of hydroxy groups of from 2 to 8, obtainable by subjecting an alkylene oxide to ring-opening addition polymerization to an initiator, in the presence of a double metal cyanide complex catalyst, to obtain an intermediate polyol; and subjecting ethylene oxide to a ring-opening addition polymerization in an amount of from 1 to 23 mol per 1 mol of the initiator to the intermediate polyol, in the presence of an alkali metal hydroxide as a polymerization catalyst, and a flexible polyurethane foam is produced by using the polyol system solution.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: June 13, 2017
    Assignee: Asahi Glass Company, Limited
    Inventors: Takayuki Sasaki, Takashi Ito, Akio Horie, Chitoshi Suzuki, Takeaki Arai, Masahito Furumi
  • Publication number: 20150038664
    Abstract: To provide a method for producing a polyether having a weight average molecular weight of from 15,000 to 550,000. The method for producing a polyether having a weight average molecular weight of from 15,000 to 550,000, comprises subjecting a cyclic monomer to a ring-opening addition reaction to an initiator having at least one active hydrogen atom per molecule in the presence of a double metal cyanide complex catalyst and an organic solvent, wherein the relative permittivity of the organic solvent is at most 18, and the amount of the organic solvent is from 6 to 300 parts by mass per 100 parts by mass in total of the initiator and the cyclic monomer.
    Type: Application
    Filed: October 18, 2014
    Publication date: February 5, 2015
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Tomohiro HAYASHI, Chitoshi SUZUKI, Takeaki ARAI, Hideaki TANAKA
  • Publication number: 20140243495
    Abstract: A polyether preparation method which comprises a polymerization step of subjecting a monoepoxide having at least 2 carbon atoms to ring-opening addition polymerization to an initiator having at least one active hydrogen-containing functional group in the presence of a catalyst in a stirring vessel, to obtain a polyether, wherein the stirring vessel is one wherein a stirring shaft rotatable by an external drive source is provided at the center of the stirring vessel; plate-shaped bottom paddles extending in a radial direction of the stirring vessel are mounted on a lower portion of the stirring shaft; lattice vanes each comprising arm paddles extending in a radial direction and strips extending in an axial direction, are mounted on a portion of the stirring shaft above the bottom paddles; and a discharge nozzle as a monoepoxide-supply means for discharging the monoepoxide to at least two locations below the lower ends of the strips.
    Type: Application
    Filed: May 5, 2014
    Publication date: August 28, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Takeaki ARAI, Tomoyuki SUZUKI, Chitoshi SUZUKI, Hideaki TANAKA
  • Publication number: 20140113985
    Abstract: To provide a process for producing a flexible polyurethane foam having a higher biomass degree than a conventional flexible polyurethane foam and excellent in foam physical properties and its appearance. A polymer-dispersed polyol obtained by polymerizing a vinyl monomer in the presence of the following polyol (a1) derived from a natural fat/oil and/or the following polyoxyalkylene polyol (a2) is used: Polyol (a1) derived from a natural fat/oil: a polyol derived from a natural fat/oil, which is obtained by providing a natural fat/oil with hydroxy groups by chemical reaction, and which has a hydroxy value of from 20 to 250 mgKOH/g and a molecular weight distribution of at least 1.
    Type: Application
    Filed: December 20, 2013
    Publication date: April 24, 2014
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Takayuki SASAKI, Yasuyuki Sasao, Naohiro Kumagai, Chitoshi Suzuki, Shigeru Ikai
  • Patent number: 8642668
    Abstract: To provide a process for producing a flexible polyurethane foam having a higher biomass degree than a conventional flexible polyurethane foam and excellent in foam physical properties and its appearance. A polymer-dispersed polyol obtained by polymerizing a vinyl monomer in the presence of the following polyol (a1) derived from a natural fat/oil and/or the following polyoxyalkylene polyol (a2) is used: Polyol (a1) derived from a natural fat/oil: a polyol derived from a natural fat/oil, which is obtained by providing a natural fat/oil with hydroxy groups by chemical reaction, and which has a hydroxy value of from 20 to 250 mgKOH/g and a molecular weight distribution of at least 1.
    Type: Grant
    Filed: December 22, 2009
    Date of Patent: February 4, 2014
    Assignee: Asahi Glass Company, Limited
    Inventors: Takayuki Sasaki, Yasuyuki Sasao, Naohiro Kumagai, Chitoshi Suzuki, Shigeru Ikai
  • Publication number: 20140031443
    Abstract: To suppress deterioration of mechanical properties of a foam, by using a polyol system solution stored. A polyol system solution is prepared by using a polyether polyol (A1) having a hydroxy value of from 5 to 45 mgKOH/g and an average number of hydroxy groups of from 2 to 8, obtainable by subjecting an alkylene oxide to ring-opening addition polymerization to an initiator, in the presence of a double metal cyanide complex catalyst, to obtain an intermediate polyol; and subjecting ethylene oxide to a ring-opening addition polymerization in an amount of from 1 to 23 mol per 1 mol of the initiator to the intermediate polyol, in the presence of an alkali metal hydroxide as a polymerization catalyst, and a flexible polyurethane foam is produced by using the polyol system solution.
    Type: Application
    Filed: September 30, 2013
    Publication date: January 30, 2014
    Applicant: Asahi Glass Company, Limited
    Inventors: Takayuki Sasaki, Takashi Ito, Akio Horie, Chitoshi Suzuki, Takeaki Arai, Masahito Furumi
  • Publication number: 20130345331
    Abstract: If it is attempted to produce a polymer polyol at a high concentration, there will be a problem such that during polymerization of a monomer to form fine polymer particles, particles are likely to aggregate one another to form aggregates, and storage stability of the polymer polyol tends to deteriorate. A method for producing a polymer polyol is presented which comprises polymerizing at least one type of ethylenically unsaturated monomer together with a seed particle dispersion, in a polyol, wherein the seed particle dispersion is one obtained by polymerizing an ethylenically unsaturated monomer in the presence of an ethylenically unsaturated macromonomer, a solvent and a chain transfer agent, and the ethylenically unsaturated macromonomer is a reaction product of a specific polyol, an isocyanate compound and an ethylenically unsaturated monomer having a hydroxy group.
    Type: Application
    Filed: August 26, 2013
    Publication date: December 26, 2013
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Chitoshi SUZUKI, Tomohiro Hayashi, Kensuke Harada, Takayuki Sasaki, Akio Horie, Takashi Ito
  • Patent number: 8530602
    Abstract: A polyether polyol composition comprising: a polyether polyol, a phosphoric acid compound selected from the group consisting of at least one of orthophosphoric acid, polyphosphoric acid, polymetaphosphoric acid, and partial esters thereof in an amount raning from 0.5 to 100 ppm based on the polyether polyol metals derived from a composite metal cyanide complex catalyst in an amount ranging from 1 to 30 ppm based on the polyether polyol; a method for producing this polyether polyol composition; and methods of making polyurethane or isocyanate group-terminated prepolymers.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: September 10, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Chitoshi Suzuki, Hiroki Fukuda, Shigeru Ikai
  • Patent number: 8445625
    Abstract: A process for producing a polyether having at least one hydroxy group by subjecting a cyclic monomer to ring-opening addition polymerization to an initiator having a hydroxy group in the presence of a double metal cyanide complex catalyst, comprising the following steps: initial step: supplying the cyclic monomer in an amount of 5 to 20 mass percent of the initiator to a reaction system containing the initiator and the catalyst, to carry out reaction, wherein the reaction system temperature when supply of the cyclic monomer is started is from 120 to 165° C., and the maximum temperature of the reaction system after supply of the cyclic monomer is higher by from 15 to 50° C. than the temperature when supply of the cyclic monomer is started; and polymerization step: supplying the cyclic monomer to the reaction system after the initial step to carry out ring-opening addition polymerization.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: May 21, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Chitoshi Suzuki, Takeaki Arai, Masahito Furumi, Hideaki Tanaka, Takayuki Sasaki, Akio Horie
  • Patent number: 8431672
    Abstract: The present invention relates to a method for manufacturing an isocyanate group-terminated prepolymer, comprising the following steps (a) to (d): (a) a step of ring-opening polymerizing an alkyleneoxide-containing cyclic compound by using an initiator in the presence of a composite metal cyanide complex catalyst, thereby obtaining a polyol composition containing the catalyst; (b) a step of, without removal of the composite metal cyanide complex catalyst from the polyol composition obtained in the step (a), adding water and performing a heat treatment in a closed system; (c) a step of subjecting the hydrous polyol composition after the step (b) to a dehydration treatment; and (d) a step of adding a polyisocyanate compound to the polyol composition after the step (c) and subjecting to a reaction with the polyol in the polyol composition.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: April 30, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Chitoshi Suzuki, Takeaki Arai, Yukio Matsumoto
  • Patent number: 8354559
    Abstract: A polyether is synthesized by ring opening polymerization of an alkylene oxide with an initiator having at least one hydroxyl group, in the presence of a double metal cyanide complex catalyst, then a powder of an inorganic adsorbent containing at least 50 vol % of fine particles having a particle size of at most 26 ?m and further containing at least 90 vol % of fine particles having a particle size of at most 44 ?m, is added to the crude polyether, and a metal derived from the above double metal cyanide complex catalyst is adsorbed on the powder, followed by separating the powder from the crude polyether.
    Type: Grant
    Filed: March 2, 2009
    Date of Patent: January 15, 2013
    Assignee: Asahi Glass Company, Limited
    Inventors: Chitoshi Suzuki, Tomoyuki Suzuki, Shigeru Ikai
  • Publication number: 20120252916
    Abstract: A process for producing a flexible polyurethane foam excellent in mechanical strength, and exhibiting reduced shrinkage. The foam is produced using a polyol (A) containing from 40 to 100 mass % of a polyoxyalkylene polyol (A1). The polyoxyalkylene polyol (A1) is produced through an initial step of adding, to a reaction liquid containing an initiator and a double metal cyanide complex catalyst, 5 to 20 mass % of an alkylene oxide, based on the content of the initiator. After the initial step, an alkylene oxide is newly supplied to carry out polymerization. In the initial step, the temperature of the reaction system when addition of the alkylene oxide is started is from 120 to 165° C., and the maximum temperature of the reaction system after the alkylene oxide has been added in the initial step is higher by 15 to 50° C. than the temperature when addition of the alkylene oxide was started.
    Type: Application
    Filed: April 3, 2012
    Publication date: October 4, 2012
    Applicant: Asahi Glass Company, Limited
    Inventors: Takayuki SASAKI, Naohiro Kumagai, Chitoshi Suzuki, Masahito Furumi
  • Publication number: 20120202963
    Abstract: In producing a polyether in the presence of a double metal cyanide complex catalyst, a narrow molecular weight distribution of the polyether can be obtained. Producing a polyether with at least one hydroxy group includes subjecting a cyclic monomer, such as an alkylene oxide, to a ring-opening addition polymerization with an initiator having a hydroxy group, in the presence of a double metal cyanide complex catalyst.
    Type: Application
    Filed: March 30, 2012
    Publication date: August 9, 2012
    Applicant: Asahi Glass Company, Limited
    Inventors: Chitoshi SUZUKI, Takeaki Arai, Masahito Furumi, Hideaki Tanaka, Takayuki Sasaki, Akio Horie
  • Publication number: 20120184704
    Abstract: The present invention relates to a method for manufacturing an isocyanate group-terminated prepolymer, comprising the following steps (a) to (d): (a) a step of ring-opening polymerizing an alkyleneoxide-containing cyclic compound by using an initiator in the presence of a composite metal cyanide complex catalyst, thereby obtaining a polyol composition containing the catalyst; (b) a step of, without removal of the composite metal cyanide complex catalyst from the polyol composition obtained in the step (a), adding water and performing a heat treatment in a closed system; (c) a step of subjecting the hydrous polyol composition after the step (b) to a dehydration treatment; and (d) a step of adding a polyisocyanate compound to the polyol composition after the step (c) and subjecting to a reaction with the polyol in the polyol composition.
    Type: Application
    Filed: March 30, 2012
    Publication date: July 19, 2012
    Applicant: Asahi Glass Company, Limited
    Inventors: Chitoshi SUZUKI, Takeaki Arai, Yukio Matsumoto
  • Publication number: 20120178840
    Abstract: To provide a polymer-dispersed polyol made by using materials derived from a natural fat/oil, which has a low viscosity, without lowering the biomass degree and without impairing the performance of a flexible polyurethane foam to be obtained. Further, to provide a process for producing a flexible polyurethane foam using the polymer-dispersed polyol. A polymer-dispersed polyol, comprising polymer particles dispersed in a matrix containing a polyol (a1) derived from a natural fat/oil and an epoxidized natural fat/oil (x). And, a process for producing a flexible polyurethane foam, which comprises reacting a polyol containing the above polymer-dispersed polyol and a polyisocyanate compound in the presence of a catalyst and a blowing agent.
    Type: Application
    Filed: March 26, 2012
    Publication date: July 12, 2012
    Applicant: Asahi Glass Company, Limited
    Inventors: Takayuki SASAKI, Naohiro KUMAGAI, Chitoshi SUZUKI, Yasuyuki SASAO, Jun KURATI
  • Publication number: 20120172537
    Abstract: To provide a process for producing a polyether, which comprises subjecting an alkylene oxide and the like to ring-opening addition polymerization to an initiator in the presence of a double metal cyanide complex catalyst (DMC catalyst), which can be carried out by use of a DMC catalyst at a low concentration, and accordingly the amount of the DMC catalyst remaining in a polyether to be obtained can be reduced. A process for producing a polyether, which comprises subjecting an alkylene oxide and an oxygen-containing heterocyclic compound other than an alkylene oxide, to ring-opening addition polymerization to an initiator having a hydroxy group in the presence of a DMC catalyst, wherein prior to the ring-opening addition polymerization, the DMC catalyst and the initiator are subjected to mixing treatment at a temperature of from 125° C. to 180° C. under an absolute pressure of at most 0.06 MPa for from 10 minutes to 24 hours.
    Type: Application
    Filed: March 13, 2012
    Publication date: July 5, 2012
    Applicant: Asahi Glass Company, Limited
    Inventors: Takeaki ARAI, Chitoshi Suzuki
  • Patent number: 8084562
    Abstract: To provide a method for producing a polymer-dispersed polyol which has high compatibility with a polyol for rigid polyurethane foams and is excellent in storage stability and which provides good heat-insulating performance when it is formed into a rigid polyurethane foam. Also a method for producing a polymer-dispersed polyol for rigid polyurethane foams, having polymer particles dispersed in a polyol, which comprises polymerizing a monomer having a polymerizable unsaturated group in a polyol (X), wherein the polyol (X) contains a polyether polyol (Y) having an oxyethylene group content of at least 10 mass %, and the monomer having a polymerizable unsaturated group contains a fluorinated acrylate or a fluorinated methacrylate.
    Type: Grant
    Filed: May 20, 2009
    Date of Patent: December 27, 2011
    Assignee: Asahi Glass Company, Limited
    Inventors: Teruhiko Yasuda, Hisashi Sato, Hiroshi Wada, Yasuhito Adachi, Tomohiro Hayashi, Chitoshi Suzuki
  • Publication number: 20100324230
    Abstract: A hydroxy compound is provided whereby a polyurethane excellent in elongation property can be produced. A hydroxy compound represented by the formula B-Am, wherein A is a univalent group which has a terminal hydroxy group and a carbonate chain composed of an ether unit produced by ring-opening of a monoepoxide and a carbonyloxy unit [—OC(O)—] linked to each other, and B is a m-valent residue produced by removing all hydroxy groups from a polycarbonate having m hydroxy groups at the terminals, provided that —O—R— in the repeating unit [—OC(O)—O—R—] of the polycarbonate is an ether unit other than an ether unit produced by ring-opening of a monoepoxide.
    Type: Application
    Filed: August 31, 2010
    Publication date: December 23, 2010
    Applicant: ASAHI GLASS COMPANY, LIMITED
    Inventors: Yasuyuki SASAO, Chitoshi Suzuki, Tomeyoshi Ohori
  • Patent number: 7786251
    Abstract: To provide a process for producing a polyester ether poly- or mono-ol having a narrow molecular weight distribution, which is obtained by copolymerizing an initiator having hydroxyl groups with a cyclic ester compound and an alkylene oxide. It is possible to produce a polyester ether poly- or mono-ol having a molecular distribution (Mw/Mn) of from 1.02 to 1.4 by copolymerizing a cyclic ester compound which carbon number is from 3 to 9 and an alkylene oxide which carbon number is from 2 to 20 with an initiator having from 1 to 12 hydroxyl groups and having a number average molecular weight (Mn) of from 18 to 20,000 in the presence of a double-metal cyanide complex catalyst is having tert-butyl alcohol as at least a part of an organic ligand.
    Type: Grant
    Filed: February 15, 2008
    Date of Patent: August 31, 2010
    Assignee: Asahi Glass Company, Limited
    Inventors: Shigeki Uemori, Shigeru Ikai, Chitoshi Suzuki