Patents by Inventor Naoyuki Kakinuma

Naoyuki Kakinuma 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: 10954341
    Abstract: A polymerizable composition for an optical material includes an episulfide compound (A); an organic coloring matter (B); an UV absorber (C); and a polymerization catalyst (D), wherein the organic coloring matter (B) has a main absorption peak (P) between 565 nm and 605 nm in a visible light absorption spectrum, an absorption coefficient (ml/g·cm) of a peak apex (Pmax) exhibiting a maximum absorption coefficient of (P) is equal to or greater than 0.5×105, a peak width in an absorbance of ¼ of an absorbance of (Pmax) of (P) is equal to or less than 50 nm, a peak width in an absorbance of ½ of the absorbance of (Pmax) of (P) is equal to or less than 30 nm, and a peak width in an absorbance of ? of the absorbance of (Pmax) of (P) is in a range of equal to or less than 20 nm.
    Type: Grant
    Filed: September 15, 2016
    Date of Patent: March 23, 2021
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Naoyuki Kakinuma, Koji Suesugi
  • Publication number: 20210017313
    Abstract: Provided are a polymerizable composition for a dental material that can yield cured molded bodies having superior mechanical strength, a molded body obtained by curing the composition, and a dental material including the molded body. A polymerizable composition for a dental material, the polymerizable composition containing: one selected from the group consisting of allyl compound (A) and an oligomer of allyl compound (A); and (meth)acrylate compound (B).
    Type: Application
    Filed: March 28, 2019
    Publication date: January 21, 2021
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Takuya MATSUMOTO, Naoyuki KAKINUMA
  • Publication number: 20200325255
    Abstract: Provided are a monomer which can provide a cured product having both high toughness and rigidity, a monomer composition containing the monomer, the monomer composition used as a dental material monomer composition, a dental material composition containing the monomer composition or the dental material monomer composition, a cured product thereof having excellent mechanical properties, a dental material formed by curing the dental material composition, a method for producing the monomer composition, and a method for producing the dental material. A (meth)acrylate (D) is a reaction product of an amine compound (A) having two or more amino groups, an iso(thio)cyanate compound (B) having two or more iso(thio)cyanato groups, and a hydroxy (meth)acrylate compound (C) having one or more polymerizable groups.
    Type: Application
    Filed: November 27, 2018
    Publication date: October 15, 2020
    Applicant: MITSUI CHEMICALS, INC.
    Inventor: Naoyuki KAKINUMA
  • Patent number: 10627650
    Abstract: An optical material of the present invention has a minimum transmittance value in a wavelength range of 445 nm to 470 nm of a transmittance curve measured at a thickness of 2 mm of the optical material.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: April 21, 2020
    Assignees: MITSUI CHEMICALS, INC., YAMAMOTO CHEMICALS, INC.
    Inventors: Naoyuki Kakinuma, Toshiya Hashimoto, Satoshi Kinoshita, Hiroyuki Sasaki
  • Patent number: 10399929
    Abstract: A manufacturing method of an amine compound including obtaining a reaction solution containing an aldehyde compound by reacting a compound represented by Formula (a1) or (a2) with hydrogen and carbon monoxide in the presence of a metal compound of groups 8 to 10 and a phosphorus compound, neutralizing the reaction, purifying an aldehyde compound by distilling the neutralized reaction solution, and reacting the aldehyde compound with ammonia and with hydrogen in the presence of a catalyst to obtain an amine compound, wherein the phosphorus compound is represented by the Formula (R1O)3P, and the base compound is at least one selected from carbonate and hydrogen carbonate of metals of group I and carbonate and hydrogen carbonate of metals of group II, and wherein the neutralizing the reaction solution is performed within a temperature range of 40° C. to 50° C.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: September 3, 2019
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Naoyuki Kakinuma, Masayuki Furuya, Michiharu Sakata, Koichi Tokunaga, Shigetoshi Kuma
  • Patent number: 10399930
    Abstract: A manufacturing method of an isocyanate compound including obtaining a reaction solution containing an aldehyde compound by reacting a compound represented by Formula (a1) or (a2) with hydrogen and carbon monoxide in the presence of a metal compound of groups 8 to 10 and a phosphorus compound, neutralizing the reaction solution, purifying an aldehyde compound by distilling the neutralized reaction solution, reacting the aldehyde compound with ammonia and with hydrogen in the presence of a catalyst to obtain an amine compound; and reacting the amine compound with a carbonylating agent to obtain an isocyanate compound, wherein the phosphorus compound is represented by the Formula (R1O)3P, and the base compound is at least one selected from carbonate and hydrogen carbonate of metals of group I and carbonate and hydrogen carbonate of metals of group II, wherein the neutralizing the reaction solution is performed within a temperature range of 40° C. to 50° C.
    Type: Grant
    Filed: October 3, 2017
    Date of Patent: September 3, 2019
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Naoyuki Kakinuma, Masayuki Furuya, Michiharu Sakata, Koichi Tokunaga, Shigetoshi Kuma
  • Publication number: 20190153146
    Abstract: A method of manufacturing a polymerizable composition for an optical material according to the present invention includes a step of mixing an iso(thio)cyanate compound (A1) and an organic coloring matter (B), so as to obtain a mixed solution a, a step of mixing the mixed solution a, an ultraviolet absorbing agent (D), and an iso(thio)cyanate compound (A2) which is identical to or different from the iso(thio)cyanate compound (A1), so as to obtain a mixed solution b, and a step of mixing a mixed solution b and an active hydrogen compound (C).
    Type: Application
    Filed: September 15, 2016
    Publication date: May 23, 2019
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Naoyuki Kakinuma, Koji Suesugi
  • Patent number: 10239239
    Abstract: An internal release agent includes at least one phosphodiester represented by the following general formula (1). In the formula, R1 and R2 independently represent a hydrocarbon group having 1 to 30 carbon atoms, which is optionally substituted with at least one hydroxyl group, and R3 represents an alkylene group having 2 to 4 carbon atoms. A plurality of R3's may be the same as or different from each other. M represents a hydrogen atom, an ammonium ion, an alkali metal ion, or a monovalent/divalent alkali earth metal ion, and n is an integer of 1 to 60.
    Type: Grant
    Filed: December 25, 2015
    Date of Patent: March 26, 2019
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Kouju Okazaki, Naoyuki Kakinuma, Motoharu Oiki
  • Publication number: 20180340044
    Abstract: A polymerizable composition for an optical material includes an episulfide compound (A); an organic coloring matter (B); an UV absorber (C); and a polymerization catalyst (D), wherein the organic coloring matter (B) has a main absorption peak (P) between 565 nm and 605 nm in a visible light absorption spectrum, an absorption coefficient (ml/g·cm) of a peak apex (Pmax) exhibiting a maximum absorption coefficient of (P) is equal to or greater than 0.5×105, a peak width in an absorbance of ¼ of an absorbance of (Pmax) of (P) is equal to or less than 50 nm, a peak width in an absorbance of ½ of the absorbance of (Pmax) of (P) is equal to or less than 30 nm, and a peak width in an absorbance of ? of the absorbance of (Pmax) of (P) is in a range of equal to or less than 20 nm.
    Type: Application
    Filed: September 15, 2016
    Publication date: November 29, 2018
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Naoyuki KAKINUMA, Koji SUESUGI
  • Patent number: 10081703
    Abstract: Disclosed is a polymerizable composition for an optical material containing polyisocyanate (a) including aliphatic polyisocyanate (a1) and a modified aliphatic polyisocyanate (a2); and polythiol (b) having a di- or higher functional thiol group, in which the modified aliphatic polyisocyanate (a2) is contained in the polyisocyanate (a) in the amount of less than or equal to 60 weight %.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: September 25, 2018
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Hidetaka Tsukada, Shinsuke Ito, Naoyuki Kakinuma, Kenichi Goto, Toshihiko Nakagawa, Satoshi Yamasaki
  • Patent number: 10066081
    Abstract: There is provided a polymerizable composition for optical materials including (A) at least one kind of polythiols selected from 5,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, 4,7-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, and 4,8-dimercaptomethyl-1,11-dimercapto-3,6,9-trithiaundecane, (B) polyisocyanate, and (C) at least one kind of ultraviolet absorbers having a maximum absorption peak in a range of 350 nm to 370 nm.
    Type: Grant
    Filed: December 12, 2014
    Date of Patent: September 4, 2018
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Naoyuki Kakinuma, Toshiya Hashimoto, Kouya Kojima
  • Patent number: 9944029
    Abstract: A process for producing an optical material of the present invention includes a step of mixing di- or higher-functional thiol compounds (A) having one or more sulfide bonds and/or one or more ester bonds with an imidazole-based curing catalyst (B) to prepare a mixed solution; a step of mixing the mixed solution with an isocyanate compound (C) including at least one kind of a di- or higher-functional alicyclic isocyanate compound (c1) and/or a di- or higher-functional aliphatic isocyanate compound (c2) to prepare a polymerizable composition for optical materials; a step of injecting the polymerizable composition for optical materials into a mold; and a step of polymerization-curing the polymerizable composition for optical materials in the mold.
    Type: Grant
    Filed: February 18, 2015
    Date of Patent: April 17, 2018
    Assignee: MITSUI CHEMICALS, INC.
    Inventor: Naoyuki Kakinuma
  • Publication number: 20180093945
    Abstract: A manufacturing method of an isocyanate compound including obtaining a reaction solution containing an aldehyde compound by reacting a compound represented by Formula (a1) or (a2) with hydrogen and carbon monoxide in the presence of a metal compound of groups 8 to 10 and a phosphorus compound, neutralizing the reaction solution, purifying an aldehyde compound by distilling the neutralized reaction solution, reacting the aldehyde compound with ammonia and with hydrogen in the presence of a catalyst to obtain an amine compound; and reacting the amine compound with a carbonylating agent to obtain an isocyanate compound, wherein the phosphorus compound is represented by the Formula (R1O)3P, and the base compound is at least one selected from carbonate and hydrogen carbonate of metals of group I and carbonate and hydrogen carbonate of metals of group II, wherein the neutralizing the reaction solution is performed within a temperature range of 40° C. to 50° C.
    Type: Application
    Filed: October 3, 2017
    Publication date: April 5, 2018
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Naoyuki KAKINUMA, Masayuki FURUYA, Michiharu SAKATA, Koichi TOKUNAGA, Shigetoshi KUMA
  • Publication number: 20180093944
    Abstract: A manufacturing method of an amine compound including obtaining a reaction solution containing an aldehyde compound by reacting a compound represented by Formula (a1) or (a2) with hydrogen and carbon monoxide in the presence of a metal compound of groups 8 to 10 and a phosphorus compound, neutralizing the reaction, purifying an aldehyde compound by distilling the neutralized reaction solution, and reacting the aldehyde compound with ammonia and with hydrogen in the presence of a catalyst to obtain an amine compound, wherein the phosphorus compound is represented by the Formula (R1O)3P, and the base compound is at least one selected from carbonate and hydrogen carbonate of metals of group I and carbonate and hydrogen carbonate of metals of group II, and wherein the neutralizing the reaction solution is performed within a temperature range of 40° C. to 50° C.
    Type: Application
    Filed: October 3, 2017
    Publication date: April 5, 2018
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Naoyuki KAKINUMA, Masayuki FURUYA, Michiharu SAKATA, Koichi TOKUNAGA, Shigetoshi KUMA
  • Patent number: 9933635
    Abstract: The optical material of the present invention contains one or more kinds of ultraviolet absorber (a) having a maximum absorption peak within a range of equal to or greater than 350 nm and equal to or less than 370 nm, in which a light transmittance of the optical material having a thickness of 2 mm satisfies the following characteristics (1) to (3), (1) a light transmittance at a wavelength of 410 nm is equal to or less than 10%, (2) a light transmittance at a wavelength of 420 nm is equal to or less than 70%, and (3) a light transmittance at a wavelength of 440 nm is equal to or greater than 80%.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: April 3, 2018
    Assignee: MITSUI CHEMICALS INC.
    Inventors: Toshiya Hashimoto, Naoyuki Kakinuma, Kouya Kojima
  • Publication number: 20180016415
    Abstract: A polymerizable composition for an optical material including (A) an isocyanate compound; (B) an active hydrogen compound; and (C) one or more types of ultraviolet absorber represented by General Formula (1) and having a maximum absorption peak in a range of equal to or more than 350 nm and equal to or less than 370 nm. (In General Formula (1) above, R1 and R2 represent, an alkyl group having 1 to 8 carbon atoms and may be same or different from each other, a plurality of R1 present or a plurality of R2 present may be same or different, m represents an integer of 0 to 3, n represents an integer of 0 to 3, and R3 represents a functional group having 2 to 15 carbon atoms which includes an ester bond.
    Type: Application
    Filed: February 1, 2016
    Publication date: January 18, 2018
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Naoyuki KAKINUMA, Kouju OKAZAKI
  • Patent number: 9857503
    Abstract: An optical material of the present invention has the following characteristics (1) to (4) in a transmittance curve which is measured at a thickness of 2 mm of the optical material. (1) the transmittance curve has a maximum transmittance value at 400 nm to 440 nm and the maximum transmittance thereof is 50% or more. (2) the transmittance curve has a minimum transmittance value at 471 nm to 500 nm. (3) The transmittance at 540 nm is 60% or more. (4) The minimum transmittance value at 471 nm to 500 nm is seven-tenths or less of the maximum transmittance at 400 nm to 440 nm and is seven-tenths or less of the transmittance at 540 nm.
    Type: Grant
    Filed: September 10, 2014
    Date of Patent: January 2, 2018
    Assignees: MITSUI CHEMICALS, INC., YAMAMOTO CHEMICALS, INC.
    Inventors: Kouya Kojima, Toshiya Hashimoto, Naoyuki Kakinuma, Satoshi Kinoshita, Hiroyuki Sasaki
  • Publication number: 20170355106
    Abstract: An internal release agent includes at least one phosphodiester represented by the following general formula (1). In the formula, R1 and R2 independently represent a hydrocarbon group having 1 to 30 carbon atoms, which is optionally substituted with at least one hydroxyl group, and R3 represents an alkylene group having 2 to 4 carbon atoms. A plurality of R3's may be the same as or different from each other. M represents a hydrogen atom, an ammonium ion, an alkali metal ion, or a monovalent/divalent alkali earth metal ion, and n is an integer of 1 to 60.
    Type: Application
    Filed: December 25, 2015
    Publication date: December 14, 2017
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Kouju OKAZAKI, Naoyuki KAKINUMA, Motoharu OIKI
  • Patent number: 9809533
    Abstract: The purification method of an aldehyde compound of the present invention includes a step of neutralizing a reaction solution containing an aldehyde compound by adding water and a base compound to the reaction solution, and a step of distilling the neutralized reaction solution, in which the reaction solution is obtained by reacting a compound represented by the following Formula (a1) or (a2) with hydrogen and carbon monoxide in the presence of a metal compound of groups 8 to 10 and a phosphorus compound, the phosphorus compound is represented by Formula (R1O)3P, and the base compound is at least one kind selected from among carbonate and hydrogen carbonate of metals of group I on the periodic table and carbonate and hydrogen carbonate of metals of group II on the periodic table.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: November 7, 2017
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Naoyuki Kakinuma, Masayuki Furuya, Michiharu Sakata, Koichi Tokunaga, Shigetoshi Kuma
  • Patent number: 9720137
    Abstract: The eyewear material is an eyewear material containing thermoplastic polyurethane. The eyewear material has a tan ? peak at both less than 0° C. and 0° C. or more and 70° C. or less observed in dynamic viscoelasticity measurement in tensile mode under the measurement conditions of a temperature increase speed of 5° C./min and a measurement frequency of 10 Hz.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: August 1, 2017
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Satoshi Yamasaki, Goro Kuwamura, Daisuke Nishiguchi, Daisuke Hasegawa, Toshihiko Nakagawa, Hirokazu Morita, Hidetaka Tsukada, Kenichi Goto, Shinsuke Ito, Naoyuki Kakinuma, Tetsuya Hamada, Shinji Kiyono, Takeshi Fukuda, Kazuhiro Kosumi