Patents by Inventor Masami Yonemura
Masami Yonemura 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: 20230151202Abstract: It could be helpful to provide a thermoplastic elastomer excellent in transparency, etc., while having mechanical properties such as high heat resistance, strength, and flexibility. The thermoplastic elastomer of this disclosure primarily comprises a copolymer including a block structural unit derived from a polymer (A) that contains a polyphenylene ether and has a glass transition temperature of 120° C. or more, and a block structural unit derived from a polymer (B) that primarily contains a diene rubber and has a glass transition temperature of 20° C. or less.Type: ApplicationFiled: March 24, 2021Publication date: May 18, 2023Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Jun SUZUKI, Hitoshi MIZOMOTO, Masami YONEMURA
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Patent number: 10597524Abstract: Provided are a methacrylic resin composition and a film containing a methacrylic resin that includes: 50 mass % to 97 mass % of a methacrylic acid ester monomer unit (A); 3 mass % to 30 mass % of a structural unit (B) having a cyclic structure-containing main chain; and 0 mass % to 20 mass % of another vinyl monomer unit (C) that is copolymerizable with a methacrylic acid ester monomer. The methacrylic resin satisfies the following conditions (1) and (2): (1) the methacrylic resin has a weight average molecular weight of 65,000 to 300,000 as measured by GPC; and (2) the total content of specific components is 0.01 mass % to 0.40 mass % as determined by GC/MS.Type: GrantFiled: November 14, 2016Date of Patent: March 24, 2020Assignee: ASAHI KASEI KABUSHIKI KAISHAInventors: Fumiki Murakami, Yutaka Tada, Yumika Kurihara, Nobuhiro Kobayashi, Masami Yonemura
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Patent number: 10409067Abstract: Provided is a component for head mounted display comprising a thermoplastic resin composition having a glass-transition temperature (Tg) of 120° C. or higher, having an absolute value of in-plane phase difference of 30 nm or less in terms of 3 mm thickness.Type: GrantFiled: March 16, 2018Date of Patent: September 10, 2019Assignee: ASAHI KASEI KABUSHIKI KAISHAInventor: Masami Yonemura
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Publication number: 20180312682Abstract: An acrylic thermoplastic resin composition includes a first acrylic resin having a first structural unit represented by the following formula (1) and a second structural unit represented by the following formula (2), and a second acrylic resin having the first structural unit represented by the following formula (1) and a third structural unit represented by the following formula (3), in which a total content of the first unit is 50 to 95 mass % and a total content of the second structural unit and the third structural unit is 5 to 50 mass % based on a total amount of the first acrylic resin and the second acrylic resin:Type: ApplicationFiled: July 6, 2018Publication date: November 1, 2018Applicant: Asahi Kasei Kabushiki KaishaInventors: Masami Yonemura, Mayuko Kimura
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Publication number: 20180305538Abstract: Provided are a methacrylic resin composition and a film containing a methacrylic resin that includes: 50 mass % to 97 mass % of a methacrylic acid ester monomer unit (A); 3 mass % to 30 mass % of a structural unit (B) having a cyclic structure-containing main chain; and 0 mass % to 20 mass % of another vinyl monomer unit (C) that is copolymerizable with a methacrylic acid ester monomer. The methacrylic resin satisfies the following conditions (1) and (2): (1) the methacrylic resin has a weight average molecular weight of 65,000 to 300,000 as measured by GPC; and (2) the total content of specific components is 0.01 mass % to 0.40 mass % as determined by GC/MS.Type: ApplicationFiled: November 14, 2016Publication date: October 25, 2018Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Fumiki MURAKAMI, Yutaka TADA, Yumika KURIHARA, Nobuhiro KOBAYASHI, Masami YONEMURA
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Publication number: 20180267315Abstract: Provided is a component for head mounted display comprising a thermoplastic resin composition having a glass-transition temperature (Tg) of 120° C. or higher, having an absolute value of in-plane phase difference of 30 nm or less in terms of 3 mm thickness.Type: ApplicationFiled: March 16, 2018Publication date: September 20, 2018Applicant: ASAHI KASEI KABUSHIKI KAISHAInventor: Masami YONEMURA
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Patent number: 10030134Abstract: An acrylic thermoplastic resin composition includes a first acrylic resin having a first structural unit represented by the following formula (1) and a second structural unit represented by the following formula (2), and a second acrylic resin having the first structural unit represented by the following formula (1) and a third structural unit represented by the following formula (3), in which a total content of the first unit is 50 to 95 mass % and a total content of the second structural unit and the third structural unit is 5 to 50 mass % based on a total amount of the first acrylic resin and the second acrylic resin:Type: GrantFiled: June 28, 2012Date of Patent: July 24, 2018Assignee: Asahi Kasei Kabushiki KaishaInventors: Masami Yonemura, Mayuko Kimura
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Publication number: 20170037236Abstract: An acrylic thermoplastic resin composition includes a first acrylic resin having a first structural unit represented by the following formula (1) and a second structural unit represented by the following formula (2), and a second acrylic resin having the first structural unit represented by the following formula (1) and a third structural unit represented by the following formula (3), in which a total content of the first unit is 50 to 95 mass % and a total content of the second structural unit and the third structural unit is 5 to 50 mass % based on a total amount of the first acrylic resin and the second acrylic resin:Type: ApplicationFiled: October 20, 2016Publication date: February 9, 2017Applicant: Asahi Kasei Kabushiki KaishaInventors: Masami Yonemura, Mayuko Kimura
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Patent number: 8895682Abstract: The present invention provides a thermoplastic acrylic resin of a copolymer comprising 10 to 70% by weight of a repeating unit derived from the particular methacrylate monomer, 5 to 40% by weight of a repeating unit derived from the particular vinyl aromatic monomer, and 20 to 50% by weight of a repeating unit of the particular cyclic acid anhydride, characterized in that a molar ratio (B/A) is within the range of more than 1 to not more than 10, wherein (A) is a content of the repeating unit of the vinyl aromatic monomer and (B) is a content of the repeating unit of the cyclic acid anhydride, and the total amount of remaining monomers to 100 parts by weight of the copolymer is not more than 0.5 part by weight.Type: GrantFiled: June 23, 2009Date of Patent: November 25, 2014Assignee: Asahi Kasei Chemicals CorporationInventors: Masami Yonemura, Mayuko Kimura
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Patent number: 8822614Abstract: The present invention provides an acrylic thermoplastic resin containing 50 to 95% by mass of a repeating unit (X) derived from a methacrylate monomer represented by the following formula (1), 0.1 to 20% by mass of a repeating unit (Y1) derived from an N-substituted maleimide monomer (a) represented by the following formula (2), and 0.1 to 49.9% by mass of a repeating unit (Y2) derived from an N-substituted maleimide monomer (b) represented by the following formula (3), regarding the total amount of the repeating unit (X), the repeating unit (Y1), and the repeating unit (Y2) as 100% by mass: The absolute value of a photoelastic coefficient (C) of the acrylic thermoplastic resin is not greater than 3.0×10?12 Pa?1. The halogen atom content is less than 0.47% by mass with reference to the mass of the acrylic thermoplastic resin.Type: GrantFiled: May 27, 2011Date of Patent: September 2, 2014Assignee: Asahi Kasei Chemicals CorporationInventors: Masami Yonemura, Mayuko Kimura
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Patent number: 8779076Abstract: The present invention provides a thermoplastic acrylic resin comprising (i) a repeating unit derived from a methacrylate monomer, (ii) a repeating unit derived from a vinyl aromatic monomer, (iii) a repeating unit derived from an aromatic group-containing methacrylate monomer, and (iv) a cyclic acid anhydride repeating unit, and a molding for optical material comprising the same.Type: GrantFiled: December 24, 2008Date of Patent: July 15, 2014Assignee: Asahi Kasei Chemicals CorporationInventors: Masami Yonemura, Mayuko Kimura, Michio Ogawa
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Publication number: 20140128547Abstract: An acrylic thermoplastic resin composition includes a first acrylic resin having a first structural unit represented by the following formula (1) and a second structural unit represented by the following formula (2), and a second acrylic resin having the first structural unit represented by the following formula (1) and a third structural unit represented by the following formula (3), in which a total content of the first unit is 50 to 95 mass % and a total content of the second structural unit and the third structural unit is 5 to 50 mass % based on a total amount of the first acrylic resin and the second acrylic resin:Type: ApplicationFiled: June 28, 2012Publication date: May 8, 2014Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Masami Yonemura, Mayuko Kimura
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Publication number: 20130072651Abstract: The present invention provides an acrylic thermoplastic resin containing 50 to 95% by mass of a repeating unit (X) derived from a methacrylate monomer represented by the following formula (1), 0.1 to 20% by mass of a repeating unit (Y1) derived from an N-substituted maleimide monomer (a) represented by the following formula (2), and 0.1 to 49.9% by mass of a repeating unit (Y2) derived from an N-substituted maleimide monomer (b) represented by the following formula (3), regarding the total amount of the repeating unit (X), the repeating unit (Y1), and the repeating unit (Y2) as 100% by mass: The absolute value of a photoelastic coefficient (C) of the acrylic thermoplastic resin is not greater than 3.0×10?12 Pa?1. The halogen atom content is less than 0.47% by mass with reference to the mass of the acrylic thermoplastic resin.Type: ApplicationFiled: May 27, 2011Publication date: March 21, 2013Applicant: ASAHI KASEI CHEMICALS CORPORATIONInventors: Masami Yonemura, Mayuko Kimura
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Publication number: 20110130535Abstract: The present invention provides a thermoplastic acrylic resin of a copolymer comprising 10 to 70% by weight of a repeating unit derived from the particular methacrylate monomer, 5 to 40% by weight of a repeating unit derived from the particular vinyl aromatic monomer, and 20 to 50% by weight of a repeating unit of the particular cyclic acid anhydride, characterized in that a molar ratio (B/A) is within the range of more than 1 to not more than 10, wherein (A) is a content of the repeating unit of the vinyl aromatic monomer and (B) is a content of the repeating unit of the cyclic acid anhydride, and the total amount of remaining monomers to 100 parts by weight of the copolymer is not more than 0.5 part by weight.Type: ApplicationFiled: June 23, 2009Publication date: June 2, 2011Inventors: Masami Yonemura, Mayuko Kimura
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Publication number: 20110009585Abstract: The present invention provides a thermoplastic acrylic resin comprising (i) a repeating unit derived from a methacrylate monomer, (ii) a repeating unit derived from a vinyl aromatic monomer, (iii) a repeating unit derived from an aromatic group-containing methacrylate monomer, and (iv) a cyclic acid anhydride repeating unit, and a molding for optical material comprising the same.Type: ApplicationFiled: December 24, 2008Publication date: January 13, 2011Inventors: Masami Yonemura, Mayuko Kimura, Michio Ogawa
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Publication number: 20080167438Abstract: An aliphatic ketone polymer comprising a unit represented by the following formula (1), the unit represented by the following formula (2), and a unit represented by the following formula (3) or (4). (In the formulae, R1 to R10 may be the same or different and each represents hydrogen, an optionally halogenated C1-20 hydrocarbon group, halogeno, hydroxy, ester, alkoxy, cyano, imide, silyl, or a group selected from the group consisting of C1-20 hydrocarbon groups substituted by a functional group selected among hydroxy, ester, alkoxy, cyano, imide, and silyl, provided that R2 and R8 may be bonded to R3 and R9, respectively, to form a monocycle or polycycle; and n1, n2, and N3 satisfy 1?n1?20, 1?n2?35,000, and 1?n3?40,000.Type: ApplicationFiled: May 10, 2005Publication date: July 10, 2008Applicants: Asahi Kasei Chemicals Corporation, Asahi Fibers CorporationInventors: Tomonari Watanabe, Takashi Komatsu, Jinichiro Kato, Masami Yonemura, Kenji Ebara