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).
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Patent number: 9678246Abstract: 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: GrantFiled: November 1, 2013Date of Patent: June 13, 2017Assignee: MITSUI CHEMICALS, INC.Inventors: Nobuo Kawato, Tatsuya Ogawa, Toshiya Hashimoto, Mamoru Tanaka, Shigetoshi Kuma
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Publication number: 20170051131Abstract: 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: ApplicationFiled: April 30, 2015Publication date: February 23, 2017Applicant: MITSUI CHEMICALS, INC.Inventors: Takayuki HANAWA, Shigetoshi KUMA
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Patent number: 9487475Abstract: 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: GrantFiled: November 8, 2013Date of Patent: November 8, 2016Assignee: MITSUI CHEMICALS, INC.Inventors: Koichi Tokunaga, Naoyuki Kakinuma, Shigetoshi Kuma
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Patent number: 9475760Abstract: A preparation method of an aldehyde compound of the present invention includes a step of reacting the compound represented by the following general formula (a1) or (a2) 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 the amount of a chlorine portion in the reaction system in the step is equal to or less than 1.5 parts by weight with respect to 1 part by weight of the metal belonging to Groups 8 to 10.Type: GrantFiled: November 8, 2013Date of Patent: October 25, 2016Assignee: MITSUI CHEMICALS, INC.Inventors: Koichi Tokunaga, Naoyuki Kakinuma, Shigetoshi Kuma
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Patent number: 9464154Abstract: A process for producing a polyurethane resin of the present invention includes a step (i) of obtaining a prepolymer by adding an alcohol (B) to isocyanate (A) such that a ratio of hydroxyl groups to isocyanato groups of the isocyanate (A) falls into a range of 10 mol % to 20 mol % and reacting the isocyanate (A) with the alcohol (B) in the presence of an acidic phosphoric acid ester (C) and a hindered amine-based compound (D), a step (ii) of obtaining a polymerizable composition in a manner in which the alcohol (B) is further added to and mixed with the prepolymer at a temperature of equal to or less than 30° C., and a step (iii) of polymerizing the prepolymer and the alcohol (B) contained in the polymerizable composition. The isocyanate (A) contains an aromatic isocyanate and the alcohol (B) has two or more hydroxyl groups and is further defined.Type: GrantFiled: November 1, 2013Date of Patent: October 11, 2016Assignee: MITSUI CHEMICALS, INC.Inventors: Nobuo Kawato, Tatsuya Ogawa, Toshiya Hashimoto, Mamoru Tanaka, Shigetoshi Kuma
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Publication number: 20160272784Abstract: 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: ApplicationFiled: March 26, 2014Publication date: September 22, 2016Applicant: Mitsui Chemicals, Inc.Inventors: Shinsuke ITO, Nobuo KAWATO, Kouji SUESUGI, Shigetoshi KUMA, Tatsuya OGAWA, Toshiya HASHIMOTO, Mamoru TANAKA
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Publication number: 20160046827Abstract: Provided are a film in which the balance between hydrophilicity and abrasion resistance is superior, decrease in hydrophilicity by water is minimal, and the weather resistance is also superior; as well as a polymer and a polymer composition that can yield such a film. The film of the invention is prepared from a specific copolymer (i) having a sulfonic acid-containing group, an epoxy group, and a specific alkoxysilyl group in a molecule, or from a composition including the copolymer (i).Type: ApplicationFiled: April 7, 2014Publication date: February 18, 2016Applicant: MITSUI CHEMICALS, INC.Inventors: Koju OKAZAKI, Takayuki HANAWA, Shigetoshi KUMA
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Patent number: 9227925Abstract: A process for producing an aldehyde compound of the invention comprising: reacting a compound represented by the following formula (a1) or (a2) with a hydrogen and a carbon monoxide in a presence of a compound containing a metal belonging to Groups 8 to 10 and a phosphorous compound so as to satisfy the following conditions (1) and (2) to synthesize an aldehyde compound; wherein the condition (1) is that a content of a metal included in the compound containing a metal belonging to Groups 8 to 10 is 0.Type: GrantFiled: May 7, 2012Date of Patent: January 5, 2016Assignee: MITSUI CHEMICALS, INC.Inventors: Shigetoshi Kuma, Michiharu Sakata, Kouichi Tokunaga, Chitoshi Shimakawa, Naoyuki Kakinuma, Masayuki Furuya, Mamoru Tanaka
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Publication number: 20150315327Abstract: A process for producing a polyurethane resin of the present invention includes a step (i) of obtaining a prepolymer by adding an alcohol (B) to isocyanate (A) such that a ratio of hydroxyl groups to isocyanato groups of the isocyanate (A) falls into a range of 10 mol % to 20 mol % and reacting the isocyanate (A) with the alcohol (B) in the presence of an acidic phosphoric acid ester (C) and a hindered amine-based compound (D), a step (ii) of obtaining a polymerizable composition in a manner in which the alcohol (B) is further added to and mixed with the prepolymer at a temperature of equal to or less than 30° C., and a step (iii) of polymerizing the prepolymer and the alcohol (B) contained in the polymerizable composition. The isocyanate (A) contains an aromatic isocyanate and the alcohol (B) has two or more hydroxyl groups and is further defined.Type: ApplicationFiled: November 1, 2013Publication date: November 5, 2015Applicant: Mitsui Chemicals, Inc.Inventors: Nobuo KAWATO, Tatsuya OGAWA, Toshiya HASHIMOTO, Mamoru TANAKA, Shigetoshi KUMA
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Publication number: 20150299109Abstract: 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: ApplicationFiled: November 8, 2013Publication date: October 22, 2015Applicant: MITSUI CHEMICALS, INC.Inventors: Koichi Tokunaga, Naoyuki Kakinuma, Shigetoshi Kuma
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Publication number: 20150299108Abstract: A preparation method of an aldehyde compound of the present invention includes a step of reacting the compound represented by the following general formula (a1) or (a2) 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 the amount of a chlorine portion in the reaction system in the step is equal to or less than 1.5 parts by weight with respect to 1 part by weight of the metal belonging to Groups 8 to 10.Type: ApplicationFiled: November 8, 2013Publication date: October 22, 2015Applicant: MITSUI CHEMICALS, INC.Inventors: Koichi Tokunaga, Naoyuki Kakinuma, Shigetoshi Kuma
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Publication number: 20150291513Abstract: 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: ApplicationFiled: November 8, 2013Publication date: October 15, 2015Applicant: MITSUI CHEMICALS, INC.Inventors: Naoyuki Kakinuma, Masayuki Furaya, Michiharu Sakata, Koichi Tokunaga, Shigetoshi Kuma
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Publication number: 20150293265Abstract: 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: ApplicationFiled: November 1, 2013Publication date: October 15, 2015Applicant: MITSUI CHEMICALS, INC.Inventors: Nobuo Kawato, Tatsuya Ogawa, Toshiya Hashimoto, Mamoru Tanaka, Shigetoshi Kuma
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Patent number: 8772441Abstract: A resin composition for an optical material that has excellent balance of refractive index of resin, Abbe number, heat resistance, specific gravity, and resin strength, a resin obtained by curing the resin composition, and an optical material are provided. A polymerizable composition comprising the following is used: An alicyclic isocyanate compound represented by the formula (1) and/or the formula (2): ?(In the formula (1), n represents integer of 0 to 3) ?and (a) at least one compound of the polythiol compound having at least two thiol groups in one molecule and/or the polythiol compound having at least two thiol groups and at least one (poly)sulfide bond other than the thiol group in one molecule, and (b) at least one compound of the polyhydroxy compound having at least two hydroxy groups in one molecule and/or the (poly)hydroxy(poly)mercapto compound having at least one hydroxy group and at least one thiol group.Type: GrantFiled: February 22, 2005Date of Patent: July 8, 2014Assignee: Mitsui Chemicals, Inc.Inventors: Shigetoshi Kuma, Koichi Tokunaga, Hiroyuki Morijiri, Seiichi Kobayashi
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Publication number: 20140088321Abstract: A process for producing an aldehyde compound of the invention comprising: reacting a compound represented by the following formula (a1) or (a2) with a hydrogen and a carbon monoxide in a presence of a compound containing a metal belonging to Groups 8 to 10 and a phosphorous compound so as to satisfy the following conditions (1) and (2) to synthesize an aldehyde compound; wherein the condition (1) is that a content of a metal included in the compound containing a metal belonging to Groups 8 to 10 is 0.Type: ApplicationFiled: May 7, 2012Publication date: March 27, 2014Applicant: Mitsui Chemicals, Inc.Inventors: Shigetoshi Kuma, Michiharu Sakata, Kouichi Tokunaga, Chitoshi Shimakawa, Naoyuki Kakinuma, Masayuki Furuya, Mamoru Tanaka
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Patent number: 8044165Abstract: Disclosed is a process for producing effectively a high performance optical material (e.g. a lens) made of a polyurethane resin, which is transparent and colorless without a strain. In this process, the optical material is produced without causing striation or clouding by polymerizing a polymerizable composition comprising a polythiol compound and a polyiso(thio)cyanate compound, and characterized in that a water content in the composition is 10 to 300 ppm.Type: GrantFiled: October 9, 2007Date of Patent: October 25, 2011Assignee: Mitsui Chemicals, Inc.Inventors: Masaru Kawaguchi, Shigetoshi Kuma, Mamoru Tanaka, Seiichi Kobayashi
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Publication number: 20110245530Abstract: A process for producing pentaerythritol mercaptocarboxylic ester by reacting pentaerythritol with a mercaptocarboxylic acid having a content of thioester formed by condensation of two molecules of the acid of 5% or below (in terms of area percentage) as determined by the high-performance liquid chromatography in the case of the total area of the mercaptocarboxylic acid and thioester formed by intermolecular condensation of the acid is taken as 100%.Type: ApplicationFiled: June 15, 2011Publication date: October 6, 2011Applicant: Mitsui Chemicals, Inc.Inventors: Michiharu SAKATA, Shigetoshi Kuma, Seiichi Kobayashi
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Publication number: 20110245531Abstract: Pentaerythritol which contains none of the alkali metals and the alkaline earth metals or which contains at least one of these in a total amount of 1.0 weight % or smaller is reacted with a mercaptocarboxylic acid to produce a pentaerythritol mercaptocarboxylic acid ester.Type: ApplicationFiled: June 15, 2011Publication date: October 6, 2011Applicant: Mitsui Chemicals, Inc.Inventors: Shigetoshi KUMA, Koichi Tokunaga, Norihiko Fukatsu, Seiichi Kobayashi
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Publication number: 20110176220Abstract: Provided is a process for producing a polythiol compound for an optical material, the method includes reacting 2-mercaptoethanol with an epihalohydrin compound to give polyalcohol, and preparing a polythiol compound through the polyalcohol, wherein a content of bis(2-hydroxyethyl)disulfide in the 2-mercaptoethanol is 0.5 wt % or less.Type: ApplicationFiled: March 30, 2011Publication date: July 21, 2011Applicant: MITSUI CHEMICALS, INC.Inventors: Shigetoshi Kuma, Masaru Kawaguchi, Seiichi Kobayashi
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Publication number: 20110178264Abstract: A process for producing a (poly)thiol compound for an optical material. The process involves reacting an organic (poly)halogen compound or a (poly)alcohol compound with thiourea to produce an isothiuronium salt and hydrolyzing the isothiuronium salt in the presence of ammonia water to thereby produce the (poly)thiol compound, wherein the thiourea has a calcium content of not more than 1.0 wt %.Type: ApplicationFiled: March 30, 2011Publication date: July 21, 2011Applicant: MITSUI CHEMICALS, INC.Inventors: Shigetoshi KUMA, Michiharu SAKATA, Seiichi KOBAYASHI