Patents by Inventor Masahiko Okamoto
Masahiko Okamoto 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: 20240149504Abstract: A resin-sealing method compression molds a resin on a workpiece having a plurality of components mounted on a carrier and manufactures a plurality of packages in each of which at least one of the components is sealed with the resin, the resin-sealing method including: setting a sheet resin in a resin molding die; and compression molding the sheet resin set in the resin molding die, wherein a penetrating hole is formed in a central portion of the sheet resin so that the amount of the resin is less in the central portion than in a peripheral portion of the sheet resin in plan view.Type: ApplicationFiled: May 31, 2021Publication date: May 9, 2024Applicant: APIC YAMADA CORPORATIONInventors: MASAHIKO FUJISAWA, MASASHI OKAMOTO, KAZUO ARAI
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Patent number: 11732075Abstract: Described is a cyclic olefin-based copolymer has a constitutional unit (A) derived from an ?-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring. Also described is a medical container containing a cyclic olefin-based copolymer having a constitutional unit (A) derived from an ?-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring.Type: GrantFiled: November 27, 2018Date of Patent: August 22, 2023Assignee: MITSUI CHEMICALS, INC.Inventors: Hideki Wasa, Haruka Saito, Sunil Krzysztof Moorthi, Futoshi Fujimura, Masahiko Okamoto, Emi Oniki, Kouichi Kizu, Jiacheng He
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Publication number: 20230159684Abstract: Described is a cyclic olefin-based copolymer has a constitutional unit (A) derived from an ?-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring. Also described is a medical container containing a cyclic olefin-based copolymer having a constitutional unit (A) derived from an ?-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring.Type: ApplicationFiled: January 23, 2023Publication date: May 25, 2023Applicant: MITSUI CHEMICALS, INC.Inventors: Hideki WASA, Haruka SAITO, Sunil Krzysztof MOORTHI, Futoshi FUJIMURA, Masahiko OKAMOTO, Emi ONIKI, Kouichi KIZU, Jiacheng HE
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Publication number: 20220081598Abstract: An adhesive resin composition including a propylene polymer (A), an ethylene polymer (B), and a thermoplastic resin (C) including a copolymer containing not less than 60 mol % and not more than 99 mol % of structural units derived from 4-methyl-1-pentene, and not less than 1 mol % and not more than 40 mol % of structural units derived from a C2-C20 ?-olefin other than 4-methyl-1-pentene, these structural units representing total 100 mol % of the copolymer, the thermoplastic resin (C) showing a melting point Tm of not more than 199° C. or showing substantially no melting point as analyzed with a differential scanning calorimeter (DSC). The total of the components (A), (B) and (C) includes 45 to 75 parts by mass of the component (A), 5 to 20 parts by mass of the component (B), and 15 to 45 parts by mass of the component (C).Type: ApplicationFiled: January 6, 2020Publication date: March 17, 2022Applicant: MITSUI CHEMICALS, INC.Inventors: Akihiko IWASHITA, Ryohei SHIGA, Motoyasu YASUI, Yoshisada FUKAGAWA, Kyoko KOBAYASHI, Masahiko OKAMOTO
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Publication number: 20220073659Abstract: The present invention provides a 4-methyl-1-pentene/?-olefin copolymer being excellent in lightness, stress absorption, stress relaxation, vibration damping properties, scratch resistance, abrasion resistance, toughness, mechanical properties and flexibility, having no stickiness during molding operation and being excellent in the balance among these properties; a composition comprising the polymer; and uses thereof. The 4-methyl-1-pentene/?-olefin copolymer (A) of the present invention satisfies specific requirements, and comprises 5 to 95 mol % of a structural unit (i) derived from 4-methyl-1-pentene, 5 to 95 mol % of a structural unit (ii) derived from at least one kind of ?-olefin selected from ?-olefins having 2 to 20 carbon atoms excluding 4-methyl-1-pentene and 0 to 10 mol % of a structural unit (iii) derived from a non-conjugated polyene, provided that the total of the structural units (i), (ii), and (iii) is 100 mol %.Type: ApplicationFiled: November 17, 2021Publication date: March 10, 2022Applicant: MITSUI CHEMICALS, INC.Inventors: Takayuki UEKUSA, Masahiko OKAMOTO, Yoshisada TAMO
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Patent number: 11248069Abstract: A 4-methyl-1-pentene polymer having: a unit derived from 4-methyl-1-pentene of 90 to 100% by mol; a unit selected from ethylene and an ?-olefin, other than 4-methyl-1-pentene, having 3 to 20 carbon atoms of 0 to 10% by mol; and the polymer satisfying the following requirements: (a) a meso diad fraction measured by 13C-NMR within the range of 98 to 100%; (b) a ratio of Z-average molecular weight Mz to weight-average molecular weight Mw measured by GPC within the range of 2.5 to 20; (c) a ratio of weight-average molecular weight Mw to number-average molecular weight Mn measured by GPC within the range of 3.6 to 30; (d) a melt flow rate measured under conditions of 260° C. and a 5 kg load (ASTM D1238) within the range of 0.1 to 500 g/10 min; and (e) an amount of a decane-soluble portion at 23° C. is 5.0% by mass or less.Type: GrantFiled: February 21, 2017Date of Patent: February 15, 2022Assignee: MITSUI CHEMICALS, INC.Inventors: Masakazu Tanaka, Masahiko Okamoto, Makoto Nakano, Sadahiko Matsuura
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Publication number: 20220041847Abstract: A resin composition including a 4-methyl-1-pentene copolymer (A) that satisfies particular requirements and a 4-methyl-1-pentene copolymer (B) that satisfies particular requirements, in which the content of the copolymer (A) is 10 to 95 parts by mass and the content of the copolymer (B) is 90 to 5 parts by mass with respect to 100 parts by mass of the total content of the copolymers (A) and (B).Type: ApplicationFiled: December 2, 2019Publication date: February 10, 2022Applicant: MITSUI CHEMICALS, INC.Inventors: Hisanori HASHIMOTO, Masahiko OKAMOTO, Makoto NAKANO, Toyoaki SASAKI, Masakazu TANAKA
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Publication number: 20220033598Abstract: The cyclic olefin-based resin composition of the present invention is a cyclic olefin-based resin composition including: a cyclic olefin-based copolymer (A); and inorganic fine particles (B) having a surface modified by a modifier, in which the modifier is one kind or two or more kinds selected from the group consisting of a phosphoric acid ester, an organic phosphonic acid, a phosphonic acid ester, a carboxylic acid, a sulfonic acid, a hydrocarbon compound having an amino group, and a silane coupling agent, and the inorganic fine particles (B) exist in a state of being dispersed in the cyclic olefin-based copolymer (A).Type: ApplicationFiled: September 5, 2019Publication date: February 3, 2022Applicant: MITSUI CHEMICALS, INC.Inventors: Mikiko NOGUCHI, Haruka SAITO, Masahiko OKAMOTO, Seigou KAWAGUCHI, Yuto TSUKUTA
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Patent number: 10870738Abstract: A polyester sheet including a polyester (A), a 4-methyl-1-pentene polymer (B) having a specific heat of fusion and a meso diad fraction (m) of 98.5 to 100%, and a compatibilizing agent (C), wherein content proportions of the (A), (B), and (C) are 60 to 98.9 parts by mass for (A), 1 to 25 parts by mass for (B), and 0.1 to 15 parts by mass for (C), when a total content of (A), (B), and (C) is set as 100 parts by mass, and wherein (B) satisfies the requirements (a) to (d) described herein.Type: GrantFiled: December 13, 2017Date of Patent: December 22, 2020Assignee: MITSUI CHEMICALS, INC.Inventors: Masakazu Tanaka, Toyoaki Sasaki, Yasuhito Tsugane, Kenkichi Yoshida, Kenjiro Takamine, Masahiko Okamoto, Takanori Tada
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Publication number: 20200369812Abstract: Described is a cyclic olefin-based copolymer has a constitutional unit (A) derived from an ?-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring. Also described is a medical container containing a cyclic olefin-based copolymer having a constitutional unit (A) derived from an ?-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring.Type: ApplicationFiled: November 27, 2018Publication date: November 26, 2020Applicant: MITSUI CHEMICALS, INC.Inventors: Hideki WASA, Haruka SAITO, Sunil Krzysztof MOORTHI, Futoshi FUJIMURA, Masahiko OKAMOTO, Emi ONIKI, Kouichi KIZU, Jiacheng HE
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Publication number: 20200247925Abstract: The present invention provides a 4-methyl-1-pentene/?-olefin copolymer being excellent in lightness, stress absorption, stress relaxation, vibration damping properties, scratch resistance, abrasion resistance, toughness, mechanical properties and flexibility, having no stickiness during molding operation and being excellent in the balance among these properties; a composition comprising the polymer; and uses thereof. The 4-methyl-1-pentene/?-olefin copolymer (A) of the present invention satisfies specific requirements, and comprises 5 to 95 mol % of a structural unit (i) derived from 4-methyl-1-pentene, 5 to 95 mol % of a structural unit (ii) derived from at least one kind of ?-olefin selected from ?-olefins having 2 to 20 carbon atoms excluding 4-methyl-1-pentene and 0 to 10 mol % of a structural unit (iii) derived from a non-conjugated polyene, provided that the total of the structural units (i), (ii), and (iii) is 100 mol %.Type: ApplicationFiled: April 14, 2020Publication date: August 6, 2020Applicant: MITSUI CHEMICALS, INC.Inventors: Takayuki UEKUSA, Masahiko OKAMOTO, Yoshisada TAMO
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Patent number: 10662270Abstract: The present invention provides a 4-methyl-1-pentene/?-olefin copolymer being excellent in lightness, stress absorption, stress relaxation, vibration damping properties, scratch resistance, abrasion resistance, toughness, mechanical properties and flexibility, having no stickiness during molding operation and being excellent in the balance among these properties; a composition comprising the polymer; and uses thereof. The 4-methyl-1-pentene/?-olefin copolymer (A) of the present invention satisfies specific requirements, and comprises 5 to 95 mol % of a structural unit (i) derived from 4-methyl-1-pentene, 5 to 95 mol % of a structural unit (ii) derived from at least one kind of ?-olefin selected from ?-olefins having 2 to 20 carbon atoms excluding 4-methyl-1-pentene and 0 to 10 mol % of a structural unit (iii) derived from a non-conjugated polyene, provided that the total of the structural units (i), (ii), and (iii) is 100 mol %.Type: GrantFiled: June 28, 2017Date of Patent: May 26, 2020Assignee: MITSUI CHEMICALS, INC.Inventors: Takayuki Uekusa, Masahiko Okamoto, Yoshisada Tamo
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Publication number: 20200071443Abstract: A graft copolymer (C) having a main chain portion of a precursor polymer (A) and a graft portion from a polymer (B), wherein a core portion of the solid product comprises the main chain portion derived from (A), a shell portion comprises the graft portion derived from (B), and the solid product satisfies: Infrared absorption spectroscopic measurement of a section passing through a center (x) of the solid product, a point (z) on a surface where a distance between the center (x) and the surface is shortest, and a middle point (y) of a line connecting the center (x) and the point (z), absorbance (Abs) satisfies X<0.01, Y<0.01, and Z?0.01, wherein X, Y, and Z represent values of Abs (key band of the polymer (B))/Abs (key band of the polymer (A)) at the center (x), the middle point (y) and the point (z).Type: ApplicationFiled: December 7, 2017Publication date: March 5, 2020Applicant: MITSUI CHEMICALS, INC.Inventors: Akihide MORI, Masahiko OKAMOTO, Katsuyoshi HARADA, Takahiro YAMADA, Shuhei YAMAMOTO, Kiyoshi TAKAHASHI, Kiyoshi YAMAMURA, Koutarou SUZUKI, Ryouichi SEKI, Shinya MATSUNAGA
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Publication number: 20200071475Abstract: A polyester sheet including a polyester (A), a 4-methyl-1-pentene polymer (B) having a specific heat of fusion and a meso diad fraction (m) of 98.5 to 100%, and a compatibilizing agent (C), wherein content proportions of the (A), (B), and (C) are 60 to 98.9 parts by mass for (A), 1 to 25 parts by mass for (B), and 0.1 to 15 parts by mass for (C), when a total content of (A), (B), and (C) is set as 100 parts by mass, and wherein (B) satisfies the requirements (a) to (d) described herein.Type: ApplicationFiled: December 13, 2017Publication date: March 5, 2020Applicant: MITSUI CHEMICALS, INC.Inventors: Masakazu TANAKA, Toyoaki SASAKI, Yasuhito TSUGANE, Kenkichi YOSHIDA, Kenjiro TAKAMINE, Masahiko OKAMOTO, Takanori TADA
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Publication number: 20190048109Abstract: A 4-methyl-1-pentene polymer having: a unit derived from 4-methyl-1-pentene of 90 to 100% by mol; a unit selected from ethylene and an ?-olefin, other than 4-methyl-1-pentene, having 3 to 20 carbon atoms of 0 to 10% by mol; and the polymer satisfying the following requirements: (a) a meso diad fraction measured by 13C-NMR within the range of 98 to 100%; (b) a ratio of Z-average molecular weight Mz to weight-average molecular weight Mw measured by GPC within the range of 2.5 to 20; (c) a ratio of weight-average molecular weight Mw to number-average molecular weight Mn measured by GPC within the range of 3.6 to 30; (d) a melt flow rate measured under conditions of 260° C. and a 5 kg load (ASTM D1238) within the range of 0.1 to 500 g/10 min; and (e) an amount of a decane-soluble portion at 23° C. is 5.0% by mass or less.Type: ApplicationFiled: February 21, 2017Publication date: February 14, 2019Applicant: MITSUI CHEMICALS, INC.Inventors: Masakazu TANAKA, Masahiko OKAMOTO, Makoto NAKANO, Sadahiko MATSUURA
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Patent number: 9902847Abstract: To provide a 4-methyl-1-pentene/olefin (co)polymer composition which is excellent in transparency and heat resistance and is excellent also in elongation and toughness and to provide a molded product composed of the composition, a film composed of the composition, which is excellent in transparency, heat resistance and dimensional stability and has been uniformly stretched, and a hollow molded product composed of the composition, which is excellent in transparency, heat resistance and toughness and is excellent also in dimensional stability. The 4-methyl-1-pentene (co)polymer composition of the present invention comprises a specific 4-methyl-1-pentene (co)polymer (A) and a specific 4-methyl-1-pentene/?-olefin copolymer (B) in a specific ratio.Type: GrantFiled: December 25, 2012Date of Patent: February 27, 2018Assignee: MITSUI CHEMICALS, INC.Inventors: Hirokazu Tanaka, Takayuki Uekusa, Masahiko Okamoto, Yoshisada Tamo
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Publication number: 20170298160Abstract: The present invention provides a 4-methyl-1-pentene/?-olefin copolymer being excellent in lightness, stress absorption, stress relaxation, vibration damping properties, scratch resistance, abrasion resistance, toughness, mechanical properties and flexibility, having no stickiness during molding operation and being excellent in the balance among these properties; a composition comprising the polymer; and uses thereof. The 4-methyl-1-pentene/?-olefin copolymer (A) of the present invention satisfies specific requirements, and comprises 5 to 95 mol % of a structural unit (i) derived from 4-methyl-1-pentene, 5 to 95 mol % of a structural unit (ii) derived from at least one kind of ?-olefin selected from ?-olefins having 2 to 20 carbon atoms excluding 4-methyl-1-pentene and 0 to 10 mol % of a structural unit (iii) derived from a non-conjugated polyene, provided that the total of the structural units (i), (ii), and (iii) is 100 mol %.Type: ApplicationFiled: June 28, 2017Publication date: October 19, 2017Applicant: MITSUI CHEMICALS, INC.Inventors: Takayuki UEKUSA, Masahiko OKAMOTO, Yoshisada TAMO
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Patent number: 9725540Abstract: The present invention provides a 4-methyl-1-pentene/?-olefin copolymer being excellent in lightness, stress absorption, stress relaxation, vibration damping properties, scratch resistance, abrasion resistance, toughness, mechanical properties and flexibility, having no stickiness during molding operation and being excellent in the balance among these properties; a composition comprising the polymer; and uses thereof. The 4-methyl-1-pentene/?-olefin copolymer (A) of the present invention satisfies specific requirements, and comprises 5 to 95 mol % of a structural unit (i) derived from 4-methyl-1-pentene, 5 to 95 mol % of a structural unit (ii) derived from at least one kind of ?-olefin selected from ?-olefins having 2 to 20 carbon atoms excluding 4-methyl-1-pentene and 0 to 10 mol % of a structural unit (iii) derived from a non-conjugated polyene, provided that the total of the structural units (i), (ii), and (iii) is 100 mol %.Type: GrantFiled: November 5, 2010Date of Patent: August 8, 2017Assignee: MITSUI CHEMICALS, INC.Inventors: Takayuki Uekusa, Masahiko Okamoto, Yoshisada Tamo
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Publication number: 20160280819Abstract: A catalyst for olefin polymerization, comprising: (A-1) a bridged metallocene compound represented by the following Formula [1-1], and (b) at least one compound selected from: (b-1) an organoaluminum oxy compound, (b-2) a compound which forms an ion pair, and (b-3) an organoaluminum compound: wherein in Formula [1-1], R1, R2, R3, R4, R5, R8, R9, and R12 are each selected from a hydrogen, a hydrocarbon group and a silicon-containing group; the four groups of R6, R7, R10, and R11 are not hydrogen atoms, and are each selected from a hydrocarbon group or a silicon-containing group; R13 and R14 are each a hydrocarbon group or the like, excluding a hydrogen atom and a methyl group; M is Ti, Zr or the like; Y is carbon or the like; Q is a halogen or the like; and j is an integer from 1 to 4.Type: ApplicationFiled: June 6, 2016Publication date: September 29, 2016Applicant: MITSUI CHEMICALS, INC.Inventors: Yasushi TOHI, Masahiko OKAMOTO, Ryoji MORI, Takashi NAKAGAWA, Shigenobu IKENAGA, Hiromasa MARUBAYASHI, Kouji NAGAHASHI, Shiro OTSUZUKI
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Patent number: 9382356Abstract: A catalyst for olefin polymerization, comprising: (A-1) a bridged metallocene compound represented by the following Formula [1-1], and (b) at least one compound selected from: (b-1) an organoaluminum oxy compound, (b-2) a compound which forms an ion pair, and (b-3) an organoaluminum compound: wherein in Formula [1-1], R1, R2, R3, R4, R5, R8, R9, and R12 are each selected from a hydrogen, a hydrocarbon group and a silicon-containing group; the four groups of R6, R7, R10, and R11 are not hydrogen atoms, and are each selected from a hydrocarbon group or a silicon-containing group; R13 and R14 are each a hydrocarbon group or the like, excluding a hydrogen atom and a methyl group; M is Ti, Zr or the like; Y is carbon or the like; Q is a halogen or the like; and j is an integer from 1 to 4.Type: GrantFiled: November 16, 2007Date of Patent: July 5, 2016Assignee: MITSUI CHEMICALS, INC.Inventors: Yasushi Tohi, Masahiko Okamoto, Ryoji Mori, Tatsuya Nakamura, Takashi Yukita, Takashi Nakagawa, Miyuki Konno, Yuichi Yamamura, Shiegenobu Ikenaga, Mayumi Hiwara, Naritoshi Hirota, Hiromasa Marubayashi, Kouji Nagahashi, Shiro Otsuzuki, Tomohiro Yamaguchi, Masashi Higuchi, Yasuo Ichiki, Takayuki Kajihara