Patents by Inventor Yasuyoshi Nakayasu
Yasuyoshi Nakayasu 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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Publication number: 20220243035Abstract: Provided is a cellulose solution (a composition) in which decomposition of cellulose does not easily proceed even if heated. Further, provided is a method for producing a cellulose fiber excellent in mechanical strength. The composition includes cellulose and a compound represented by the following formula (1), a concentration of 1-methylimidazolium chloride being 300 ppm or less on a mass basis with respect to the compound represented by the formula (1). In the formula (1), R is an alkyl group having 2 to 6 carbon atoms, and Me is a methyl group.Type: ApplicationFiled: April 21, 2020Publication date: August 4, 2022Applicant: MITSUBISHI GAS CHEMICAL COMPANY, INC.Inventors: Kimihiro AOYAMA, Tetsuhiko MIZUSAKA, Yasuyoshi NAKAYASU, Yasuo GOTOH
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Publication number: 20190010279Abstract: The present invention provides a polycarbonate resin having a terminal structure derived from a monovalent phenol represented by general formula (1), and a constitutional unit derived from a divalent phenol, wherein the specific alcohol content is 500 ppm or less.Type: ApplicationFiled: September 13, 2016Publication date: January 10, 2019Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Genki SUGIYAMA, Hidetaka SHIMIZU, Yasuyoshi NAKAYASU, Ken OGASAWARA, Hiroshi NAKASEKO, Yuusuke NII
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Patent number: 10118988Abstract: A synthetic resin laminated sheet, in which whitening, cracking, and foaming do not occur when thermoforming is carried out, in particular when deep-draw molding is carried out, and defects do not occur during lamination of a hard coating layer; and a molded article obtained by molding the laminated sheet. A synthetic resin laminated sheet has a coating layer, which includes an acrylic resin, laminated on one surface of a substrate layer including a polycarbonate resin in which a monohydric phenol represented by general formula (1) is used as a chain terminator and is obtained by reacting the monohydric phenol with a dihydric phenol and a carbonate binding agent and has a viscosity average molecular weight of 18000-35000. (In the formula, R1 represents a C8-36 alkyl group or a C8-36 alkenyl group. R2-R5 each represent hydrogen, halogen, or an optionally substituted C1-20 alkyl group or C6-12 aryl group).Type: GrantFiled: October 13, 2015Date of Patent: November 6, 2018Assignees: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Yasuyoshi Nakayasu, Ken Ogasawara, Genki Sugiyama, Hidetaka Shimizu
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Patent number: 9802395Abstract: The present invention provides a synthetic resin laminate, which is excellent in terms of shape stability in a high-temperature or high-humidity environment, surface hardness, heat resistance, coating adhesion and the like. The synthetic resin laminate is formed by laminating a resin layer (A) including 5% to 55% by mass of a (meth)acrylate copolymer (C) and 95% to 45% by mass of a polycarbonate (D) on one surface or both surfaces of a base material layer (B) comprising polycarbonate, wherein the synthetic resin laminate is characterized: in that the (meth)acrylate copolymer (C) includes an aromatic (meth)acrylate unit (c1) and a methyl methacrylate unit (c2) at a mass ratio (c1/c2) of 5 to 80/20 to 95; in that the mass average molecular weight of the (meth)acrylate copolymer (C) is 5,000 to 30,000; and in that the viscosity average molecular weight of the polycarbonate (D) is 21,000 to 40,000.Type: GrantFiled: December 17, 2014Date of Patent: October 31, 2017Assignees: MITSUBISSHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Takeshi Onishi, Yasuyoshi Nakayasu, Kishin Ozawa
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Publication number: 20170306089Abstract: A synthetic resin laminated sheet, in which whitening, cracking, and foaming do not occur when thermoforming is carried out, in particular when deep-draw molding is carried out, and defects do not occur during lamination of a hard coating layer; and a molded article obtained by molding the laminated sheet. A synthetic resin laminated sheet has a coating layer, which includes an acrylic resin, laminated on one surface of a substrate layer including a polycarbonate resin in which a monohydric phenol represented by general formula (1) is used as a chain terminator and is obtained by reacting the monohydric phenol with a dihydric phenol and a carbonate binding agent and has a viscosity average molecular weight of 18000-35000. (In the formula, R1 represents a C8-36 alkyl group or a C8-36 alkenyl group. R2-R5 each represent hydrogen, halogen, or an optionally substituted C1-20 alkyl group or C6-12 aryl group).Type: ApplicationFiled: October 13, 2015Publication date: October 26, 2017Applicants: Mitsubishi Gas Chemical Company, Inc., MGC Filsheet Co., Ltd.Inventors: Yasuyoshi NAKAYASU, Ken OGASAWARA, Genki SUGIYAMA, Hidetaka SHIMIZU
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Publication number: 20170136748Abstract: It is an object of the present invention to provide a synthetic resin laminate for use in transparent substrate materials or transparent protective materials, having excellent shape stability and surface hardness. This has been achieved by laminating a resin composition formed by polymer-alloying i) 25% to 100% by mass of a specific styrene-unsaturated dicarboxylic acid copolymer consisting of 45% to 70% by mass of a styrene monomer unit, 10% to 30% by mass of an unsaturated dicarboxylic acid anhydride monomer unit, and 10% to 35% by mass of a vinyl monomer, and ii) 75% to 0% by mass of a resin comprising a vinyl monomer as a constitutional unit, on one surface of a base material layer comprising a polycarbonate as a main component. Thus, the present invention provides the above-described synthetic resin laminate, a transparent material comprising the synthetic resin laminate, and the like.Type: ApplicationFiled: October 31, 2014Publication date: May 18, 2017Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Takeshi ONISHI, Osamu KAKINOKI, Yasuyoshi NAKAYASU, Kishin OZAWA
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Publication number: 20160311204Abstract: The present invention provides a synthetic resin laminate, which is excellent in terms of shape stability in a high-temperature or high-humidity environment, surface hardness, heat resistance, coating adhesion and the like. The synthetic resin laminate is formed by laminating a resin layer (A) including 5% to 55% by mass of a (meth)acrylate copolymer (C) and 95% to 45% by mass of a polycarbonate (D) on one surface or both surfaces of a base material layer (B) comprising polycarbonate, wherein the synthetic resin laminate is characterized: in that the (meth)acrylate copolymer (C) includes an aromatic (meth)acrylate unit (c1) and a methyl methacrylate unit (c2) at a mass ratio (c1/c2) of 5 to 80/20 to 95; in that the mass average molecular weight of the (meth)acrylate copolymer (C) is 5,000 to 30,000; and in that the viscosity average molecular weight of the polycarbonate (D) is 21,000 to 40,000.Type: ApplicationFiled: December 17, 2014Publication date: October 27, 2016Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Takeshi ONISHI, Yasuyoshi NAKAYASU, Kishin OZAWA
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Patent number: 9446567Abstract: The present invention has an object of providing a synthetic resin laminate that is usable for a transparent substrate material or protective material, has high thermoformability (pressure formability, thermal-bending formability), high insert moldability, and high surface hardness and/or impact resistance, and also providing a molded body formed by molding such a synthetic resin laminate. The synthetic resin laminate includes a polycarbonate-based substrate layer; and a resin laminated on one of, or both of, two surfaces of the polycarbonate-based substrate layer, the resin containing a specific (meth)acrylate copolymer resin and a specific polycarbonate resin. The polycarbonate-based substrate layer includes a polymer alloy and thus has a glass transition temperature (Tg) of 110 to 130° C. Thus, the resultant synthetic resin laminate has high thermoformability and high surface hardness.Type: GrantFiled: September 20, 2013Date of Patent: September 20, 2016Assignees: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Takeshi Onishi, Osamu Kakinoki, Yasuyoshi Nakayasu, Hidetaka Shimizu, Hirohiko Aikawa
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Publication number: 20150224748Abstract: The present invention has an object of providing a synthetic resin laminate that is usable for a transparent substrate material or protective material, has high thermoformability (pressure formability, thermal-bending formability), high insert moldability, and high surface hardness and/or impact resistance, and also providing a molded body formed by molding such a synthetic resin laminate. The synthetic resin laminate includes a polycarbonate-based substrate layer; and a resin laminated on one of, or both of, two surfaces of the polycarbonate-based substrate layer, the resin containing a specific (meth)acrylate copolymer resin and a specific polycarbonate resin. The polycarbonate-based substrate layer includes a polymer alloy and thus has a glass transition temperature (Tg) of 110 to 130° C. Thus, the resultant synthetic resin laminate has high thermoformability and high surface hardness.Type: ApplicationFiled: September 20, 2013Publication date: August 13, 2015Applicants: MITSUBISHI GAS CHEMICAL COMPANY, INC., MGC FILSHEET CO., LTD.Inventors: Takeshi Onishi, Osamu Kakinoki, Yasuyoshi Nakayasu, Hidetaka Shimizu, Hirohiko Aikawa