Patents by Inventor Shigetoshi Kuma

Shigetoshi Kuma 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: 10844010
    Abstract: In a process for producing a (poly) sulfide compound represented by General Formula (2) of the present invention, thiol compounds represented by General Formula (1) are reacted with each other in the presence of a basic compound represented by General Formula (4) or General Formula (5) and sulfur.
    Type: Grant
    Filed: March 17, 2017
    Date of Patent: November 24, 2020
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Koichi Tokunaga, Chitoshi Shimakawa, Shigetoshi Kuma, Masaru Kawaguchi
  • Patent number: 10774038
    Abstract: A process for producing cyanonorbornene of the present invention includes Step 1 of preparing a mixture solution including 0.5% by weight to 28% by weight of methyl bicyclononadiene, with respect to a total amount of 100% by weight of dicyclopentadiene, acrylonitrile, and the methyl bicyclononadiene, in a container, and Step 2 of reacting the bicyclopentadiene with the acrylonitrile in the presence of the methyl bicyclononadiene, in the mixture solution.
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: September 15, 2020
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Shigetoshi Kuma, Tomoya Sanda
  • Publication number: 20200239408
    Abstract: A process for producing cyanonorbornene of the present invention includes Step 1 of preparing a mixture solution including 0.5% by weight to 28% by weight of methyl bicyclononadiene, with respect to a total amount of 100% by weight of dicyclopentadiene, acrylonitrile, and the methyl bicyclononadiene, in a container, and Step 2 of reacting the bicyclopentadiene with the acrylonitrile in the presence of the methyl bicyclononadiene, in the mixture solution.
    Type: Application
    Filed: July 23, 2018
    Publication date: July 30, 2020
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Shigetoshi KUMA, Tomoya SANDA
  • Patent number: 10696627
    Abstract: A process for producing a pentaerythritol mercaptocarboxylic acid ester of the present invention includes: a step of reacting pentaerythritol with a mercaptocarboxylic acid, in which an absorbance of a 5 wt % aqueous solution of the pentaerythritol at a wavelength of 270 nm, which is measured using a quartz cell having an optical path length of 50 mm, is 0.07 or less.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: June 30, 2020
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Shigetoshi Kuma, Masayuki Furuya, Takeshi Nishimura
  • Publication number: 20200190249
    Abstract: A xylylenediisocyanate composition including xylylenediisocyanate and a compound represented by Chemical Formula (1) below, wherein 0.
    Type: Application
    Filed: February 25, 2020
    Publication date: June 18, 2020
    Inventors: Satoshi YAMASAKI, Daisuke HASEGAWA, Hirokazu MORITA, Hideaki OTSUKA, Tatsuya NAKASHIMA, Chitoshi SHIMAKAWA, Shigetoshi KUMA, Masaaki SASAKI
  • Patent number: 10640605
    Abstract: A xylylenediisocyanate composition including xylylenediisocyanate and a compound represented by Chemical Formula (1) below, wherein 0.
    Type: Grant
    Filed: April 9, 2018
    Date of Patent: May 5, 2020
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Satoshi Yamasaki, Daisuke Hasegawa, Hirokazu Morita, Hideaki Otsuka, Tatsuya Nakashima, Chitoshi Shimakawa, Shigetoshi Kuma, Masaaki Sasaki
  • Publication number: 20190292304
    Abstract: A xylylenediisocyanate composition including xylylenediisocyanate and a compound represented by Chemical Formula (1) below, wherein 0.
    Type: Application
    Filed: April 9, 2018
    Publication date: September 26, 2019
    Inventors: Satoshi YAMASAKI, Daisuke HASEGAWA, Hirokazu MORITA, Hideaki OTSUKA, Tatsuya NAKASHIMA, Chitoshi SHIMAKAWA, Shigetoshi KUMA, Masaaki 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: 20190106529
    Abstract: A xylylene diisocyanate composition contains a xylylene diisocyanate and a chloromethylbenzyl isocyanate. The content ratio of the chloromethylbenzyl isocyanate is 0.2 ppm or more and below 600 ppm.
    Type: Application
    Filed: April 11, 2017
    Publication date: April 11, 2019
    Inventor: Shigetoshi KUMA
  • Publication number: 20190077751
    Abstract: In a process for producing a (poly) sulfide compound represented by General Formula (2) of the present invention, thiol compounds represented by General Formula (1) are reacted with each other in the presence of a basic compound represented by General Formula (4) or General Formula (5) and sulfur.
    Type: Application
    Filed: March 17, 2017
    Publication date: March 14, 2019
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Koichi Tokunaga, Chitoshi Shimakawa, Shigetoshi Kuma, Masaru Kawaguchi
  • Patent number: 10196501
    Abstract: Provided is a polymerizable composition for an optical material including (A) isocyanates having two or more isocyanato groups, which include at least an isophorone diisocyanate, (B) at least one predetermined thiol having two or more mercapto groups, (C) an acidic phosphoric acid ester represented by General Formula (1), and (D) a tin compound represented by General Formula (2), in which the acidic phosphoric acid ester (C) is contained in an amount of 0.05 parts by weight to 0.9 parts by weight, with respect to a total of 100 parts by weight of the isocyanates (A) and the thiols (B), and the tin compound (D) is contained in such an amount that the content of tin is 0.05 parts by weight to 0.3 parts by weight, with respect to a total of 100 parts by weight of the isocyanates (A) and the thiols (B).
    Type: Grant
    Filed: April 30, 2015
    Date of Patent: February 5, 2019
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Takayuki Hanawa, Shigetoshi Kuma
  • Patent number: 10131767
    Abstract: The polymerizable composition for an optical material of the present invention contains (A) at least one kind of isocyanate having two or more isocyanato groups, which contains aromatic isocyanate, (B) at least one kind of alcohol having two or more hydroxyl groups, (C) an acidic phosphoric acid ester represented by the following Formula (1), and (D) a benzotriazole-based compound, in which a ratio of secondary hydroxyl groups to the total molar number of primary and secondary hydroxyl groups contained in the alcohol (B) is equal to or greater than 50%, and the benzotriazole-based compound (D) is contained in an amount of 1 part by weight to 11 parts by weight with respect to a total of 100 parts by weight of the isocyanate (A) and the alcohol (B).
    Type: Grant
    Filed: March 26, 2014
    Date of Patent: November 20, 2018
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Shinsuke Ito, Nobuo Kawato, Kouji Suesugi, Shigetoshi Kuma, Tatsuya Ogawa, Toshiya Hashimoto, Mamoru Tanaka
  • Publication number: 20180186733
    Abstract: A process for producing a pentaerythritol mercaptocarboxylic acid ester of the present invention includes: a step of reacting pentaerythritol with a mercaptocarboxylic acid, in which an absorbance of a 5 wt % aqueous solution of the pentaerythritol at a wavelength of 270 nm, which is measured using a quartz cell having an optical path length of 50 mm, is 0.07 or less.
    Type: Application
    Filed: June 24, 2016
    Publication date: July 5, 2018
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Shigetoshi KUMA, Masayuki FURUYA, Takeshi NISHIMURA
  • 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
  • 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
  • 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: 9678246
    Abstract: A polymerizable composition for an optical material includes: (A) one or more isocyanates having two or more isocyanato groups that contains an aromatic isocyanate; (B) one or more alcohols having two or more hydroxyl groups; and (C) an acid phosphate represented by the following formula (1), in which a ratio of the molar number of a secondary hydroxyl group to the total molar number of primary and secondary hydroxyl groups contained in the alcohol (B) is 50% or higher.
    Type: Grant
    Filed: November 1, 2013
    Date of Patent: June 13, 2017
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Nobuo Kawato, Tatsuya Ogawa, Toshiya Hashimoto, Mamoru Tanaka, Shigetoshi Kuma
  • Publication number: 20170051131
    Abstract: Provided is a polymerizable composition for an optical material including (A) isocyanates having two or more isocyanato groups, which include at least an isophorone diisocyanate, (B) at least one predetermined thiol having two or more mercapto groups, (C) an acidic phosphoric acid ester represented by General Formula (1), and (D) a tin compound represented by General Formula (2), in which the acidic phosphoric acid ester (C) is contained in an amount of 0.05 parts by weight to 0.9 parts by weight, with respect to a total of 100 parts by weight of the isocyanates (A) and the thiols (B), and the tin compound (D) is contained in such an amount that the content of tin is 0.05 parts by weight to 0.3 parts by weight, with respect to a total of 100 parts by weight of the isocyanates (A) and the thiols (B).
    Type: Application
    Filed: April 30, 2015
    Publication date: February 23, 2017
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Takayuki HANAWA, Shigetoshi KUMA
  • Patent number: 9487475
    Abstract: A preparation method of an aldehyde compound of the present invention includes a step of reacting a compound represented by the following general formula (a1) with hydrogen and carbon monoxide in the presence of a metal compound including 0.01 ppmmol to 10 ppmmol of a metal belonging to Groups 8 to 10 with respect to 1 mole of the compound and a phosphorus compound, and in the step, the amount of acrylonitrile included in the compound represented by the general formula (a1) is equal to or less than 200-fold by mole with respect to 1 mole of the metal belonging to Groups 8 to 10.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: November 8, 2016
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Koichi Tokunaga, Naoyuki Kakinuma, Shigetoshi Kuma