Patents by Inventor Kotaro Ichino
Kotaro Ichino 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: 20200016874Abstract: A laminate of different kinds of halogen-containing rubbers (polymers) excellent in bonding strength. The laminate including the following layers (1) and (2) directly bonded to each other: layer (1): a layer of a composition including 100 parts by mass of a halogen-based rubber (A) (excluding a fluorine-based rubber), and 1 to 30 parts by mass of an inorganic compound (B) containing at least one element selected from Group 2 elements and Group 13 elements, and an oxygen atom; and layer (2): a layer of a halogen-containing polymer (C) (excluding the halogen-based rubber of the layer (1)).Type: ApplicationFiled: February 28, 2018Publication date: January 16, 2020Applicant: MITSUI CHEMICALS, INC.Inventors: Yoshiharu KIKUCHI, Kotaro ICHINO
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Publication number: 20190358928Abstract: An object of the present invention is to provide a laminate of an olefin-type rubber, which is non-polar or has a small polarity and which is difficult to bond with a different material, and a rubber including Group 16 elements and/or Group 17 elements, which is a different kind of rubber. The laminate according to the present invention includes a structure including, in order, an olefin-type rubber layer (A) ; an adhesive resin layer (B) containing at least one selected from the group consisting of an ethylene/vinyl acetate copolymer, a silane-modified ethylene/vinyl acetate copolymer, an ethylene/acrylic acid copolymer and an ionomer thereof, and an ethylene/methacrylic acid copolymer and an ionomer thereof; and a rubber layer (C) containing Group 16 elements and/or Group 17 elements.Type: ApplicationFiled: February 13, 2018Publication date: November 28, 2019Applicant: MITSUI CHEMICALS, INC.Inventors: Yoshiharu KIKUCHI, Kotaro ICHINO
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Patent number: 10435494Abstract: A novel ethylene/?-olefin/non-conjugated polyene copolymer comprising structural units derived from ethylene (A), an ?-olefin (B) of 3 to 20 carbon atoms, and a non-conjugated polyene (C) containing intramolecularly two or more partial structures in total selected from the group consisting of structures of Formulae (I) and (II), and having a small number of long-chain branches, The novel ethylene/?-olefin/non-conjugated polyene copolymer contains a non-conjugated polyene such as VNB as a copolymerization component and a small long-chain branch content and is excellent in curing properties in the case of crosslinking using peroxide; and a process for producing the ethylene/?-olefin/non-conjugated polyene copolymer, and a use thereof are provided.Type: GrantFiled: July 9, 2018Date of Patent: October 8, 2019Assignee: MITSUI CHEMICALS, INC.Inventors: Kotaro Ichino, Yoshiharu Kikuchi, Yasushi Tohi, Tomoaki Matsugi, Yasushi Yanagimoto, Mitsunao Arino, Keisuke Shishido, Mikio Hosoya
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Publication number: 20190047264Abstract: The layered product includes at least one type of layer selected from the layers (1) and (2), and at least one type of layer selected from the layers (3) and (4), in which at least one layer of the at least one type of layer selected from the layers (1) and (2) is directly in contact with or adjacent via an adhesive layer to at least one layer of the at least one type of layer selected from the layers (3) and (4): layer (1): a layer prepared using an ethylene/?-olefin/non-conjugated polyene copolymer; layer (2): a layer prepared using an ethylene/carboxylic acid copolymer; layer (3): a layer prepared using an acrylic-type rubber; and layer (4): a layer prepared using a halogen-containing polymer.Type: ApplicationFiled: March 1, 2017Publication date: February 14, 2019Applicant: MITSUI CHEMICALS, INC.Inventors: Yoshiharu KIKUCHI, Kotaro ICHINO
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Patent number: 10131726Abstract: A novel ethylene/?-olefin/non-conjugated polyene copolymer comprising structural units derived from ethylene (A), an ?-olefin (B) of 3 to 20 carbon atoms, and a non-conjugated polyene (C) containing intramolecularly two or more partial structures in total selected from the group consisting of structures of Formulae (I) and (II), and having a small number of long-chain branches, The novel ethylene/?-olefin/non-conjugated polyene copolymer contains a non-conjugated polyene such as VNB as a copolymerization component and a small long-chain branch content and is excellent in curing properties in the case of crosslinking using peroxide; and a process for producing the ethylene/?-olefin/non-conjugated polyene copolymer, and a use thereof are provided.Type: GrantFiled: February 13, 2015Date of Patent: November 20, 2018Assignee: MITSUI CHEMICALS, INC.Inventors: Kotaro Ichino, Yoshiharu Kikuchi, Yasushi Tohi, Tomoaki Matsugi, Yasushi Yanagimoto, Mitsunao Arino, Keisuke Shishido, Mikio Hosoya
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Publication number: 20180319917Abstract: A novel ethylene/?-olefin/non-conjugated polyene copolymer comprising structural units derived from ethylene (A), an ?-olefin (B) of 3 to 20 carbon atoms, and a non-conjugated polyene (C) containing intramolecularly two or more partial structures in total selected from the group consisting of structures of Formulae (I) and (II), and having a small number of long-chain branches, The novel ethylene/?-olefin/non-conjugated polyene copolymer contains a non-conjugated polyene such as VNB as a copolymerization component and a small long-chain branch content and is excellent in curing properties in the case of crosslinking using peroxide; and a process for producing the ethylene/?-olefin/non-conjugated polyene copolymer, and a use thereof are provided.Type: ApplicationFiled: July 9, 2018Publication date: November 8, 2018Applicant: MITSUI CHEMICALS, INC.Inventors: Kotaro ICHINO, Yoshiharu KIKUCHI, Yasushi TOHI, Tomoaki MATSUGI, Yasushi YANAGIMOTO, Mitsunao ARINO, Keisuke SHISHIDO, Mikio HOSOYA
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Publication number: 20180244896Abstract: [Means for solving problem] The resin composition of the present invention comprises 100 parts by mass of a specific ethylene/?-olefin/non-conjugated polyene copolymer (A) and 0.1 to 5 parts by mass of a peroxide (B), and the copolymer (A) comprises structural units derived from ethylene (a1), an ?-olefin (a2) having 3 to 20 carbon atoms, and a non-conjugated polyene (a3) including intramolecularly two or more partial structures in total selected from the group consisting of structures represented by the following formulae (I) and (II), [Effect] The resin composition of the present invention is excellent in crosslinking properties and the resin composition and its crosslinked shaped article of the present invention can be used, without any limitation, in various applications known as applications of rubber composition, and can be suitably used, for example, for interior and exterior parts for automobiles and applications requiring heat resistance.Type: ApplicationFiled: March 24, 2016Publication date: August 30, 2018Applicant: MITSUI CHEMICALS, INC.Inventors: Kotaro ICHINO, Yoshiharu KIKUCHI, Mitsunao ARINO, Mikio HOSOYA, Keisuke SHISHIDO
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Publication number: 20180072877Abstract: [Problem] The purpose of the invention is to provide: a thermoplastic elastomer composition capable of providing molded articles that are lightweight, have better oil resistance than those provided by conventional cross-linked thermoplastic elastomers, and have hardness and mechanical properties such as tensile strength and tensile elongation that are equal to or superior to those provided by conventional cross-linked thermoplastic elastomers; and an ethylene/?-olefin/unconjugated polyene copolymer having little compression set at low temperature as well as flexibility and an excellent balance of rubber elasticity at low temperature and tensile strength at normal temperature.Type: ApplicationFiled: March 17, 2016Publication date: March 15, 2018Applicant: MITSUI CHEMICALS, INC.Inventors: Kotaro ICHINO, Tomohiro YAMAGUCHI, Yukio AITA, Yuji NOGUCHI
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Patent number: 9914820Abstract: Provided is a lump that is suitable to be used with rubber and compounding agents in producing rubber products with low hardness, of which an uniform kneaded product can be quickly obtained while kneading to produce rubber products, and that does not easily change its shape even when stored for a long period of time.Type: GrantFiled: April 9, 2014Date of Patent: March 13, 2018Assignee: MITSUI CHEMICALS, INC.Inventors: Kotaro Ichino, Yoshiharu Kikuchi
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Publication number: 20180066402Abstract: A railroad rail track pad composition including a particular ethylene•?-olefin•non-conjugated polyene random copolymer (A), clay (B), and a sulfur atom-containing silane coupling agent (C) is used in order to lower the viscosity of a rubber composition that is a raw material for molding while suppressing lowering of the rubber elasticity of a crosslinked and molded product to be obtained. In addition, a molded product obtained by crosslinking the composition, particularly a molded product obtained by crosslinking and foam-molding the composition, is provided with rubber elasticity that is suitable as a railroad rail track pad.Type: ApplicationFiled: March 11, 2016Publication date: March 8, 2018Applicant: Mitsui Chemicals, Inc.Inventors: Tatsuya SAKAI, Yuji ISHII, Kiyohide INOMATA, Kotaro ICHINO
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Publication number: 20160355622Abstract: A novel ethylene/?-olefin/non-conjugated polyene copolymer comprising structural units derived from ethylene (A), an ?-olefin (B) of 3 to 20 carbon atoms, and a non-conjugated polyene (C) containing intramolecularly two or more partial structures in total selected from the group consisting of structures of Formulae (I) and (II), and having a small number of long-chain branches, The novel ethylene/?-olefin/non-conjugated polyene copolymer contains a non-conjugated polyene such as VNB as a copolymerization component and a small long-chain branch content and is excellent in curing properties in the case of crosslinking using peroxide; and a process for producing the ethylene/?-olefin/non-conjugated polyene copolymer, and a use thereof are provided.Type: ApplicationFiled: February 13, 2015Publication date: December 8, 2016Applicant: MITSUI CHEMICALS, INC.Inventors: Kotaro ICHINO, Yoshiharu KIKUCHI, Yasushi TOHI, Tomoaki MATSUGI, Yasushi YANAGIMOTO, Mitsunao ARINO, Keisuke SHISHIDO, Mikio HOSOYA
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Publication number: 20160347894Abstract: The purpose of the present invention is to obtain an ethylene•?-olefin•non-conjugated polyene copolymer that has a low permanent compression set at low temperatures, is flexible, and has an excellent balance of rubber elasticity at low temperatures and tensile strength at normal temperatures. This ethylene-based polymer is an ethylene•?-olefin•non-conjugated polyene copolymer that includes units derived from ethylene (A), units derived from an ?-olefin (B) containing 4-20 carbon atoms, and units derived from a non-conjugated polyene (C) and satisfies (1)-(4). (1) The molar ratio of (A) to (B) is 40/60-90/10, (2) the contained amount of the units derived from (C) is 0.1-6.0 mol %, (3) ML(1+4)125° C. is 5-100, and (4) the B value is 1.20 or more.Type: ApplicationFiled: February 10, 2015Publication date: December 1, 2016Applicant: MITSUI CHEMICALS, INC.Inventors: Koji ENDO, Mayumi HIWARA, Sadahiko MATSUURA, Yusuke MIZOBUCHI, Yuichi YAMAMURA, Yuji NOGUCHI, Yuji ISHII, Tatsuya SAKAI, Keisuke SHISHIDO, Kotaro ICHINO, Kiyohide INOMATA, Fumito TAKEUCHI, Kenta IDE
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Publication number: 20160053080Abstract: [Objective] Provided is a lump that is suitable to be used with rubber and compounding agents in producing rubber products with low hardness, of which an uniform kneaded product can be quickly obtained while kneading to produce rubber products, and that does not easily change its shape even when stored for a long period of time.Type: ApplicationFiled: April 9, 2014Publication date: February 25, 2016Applicant: MITSU CHEMICALS, INC.Inventors: Kotaro ICHINO, Yoshiharu KIKUCHI
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Patent number: 9023906Abstract: To provide a propylene-based copolymer and a propylene-based copolymer composition, each of which has a high melt tension because it has a long-chain branched structure, exhibits excellent molding processability during molding, such as inflation molding, extrusion molding, blow molding, injection molding or vacuum forming, and is capable of favorably providing a foamed product having an excellent expansion ratio and excellent cell uniformity in the foaming stage. The propylene-based copolymer (A) of the present invention comprises 50 to 95% by mol of constituent units [i] derived from propylene, 4.9 to 49.9% by mol of constituent units [ii] derived from an ?-olefin of 2 to 10 carbon atoms other than propylene and 0.1 to 10% by mol of constituent units [iii] derived from a non-conjugated polyene (with the proviso that the total amount of the constituent units [i], [ii] and [iii] is 100% by mol), and is characterized by satisfying specific requirements (a) and (c).Type: GrantFiled: May 17, 2012Date of Patent: May 5, 2015Assignee: Mitsui Chemicals, Inc.Inventors: Masahiko Okamoto, Mayumi Yasuda, Tetsuji Kasai, Kazuyoshi Kaneko, Kyoko Kobayashi, Kotaro Ichino
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Publication number: 20140088214Abstract: To provide a propylene-based copolymer and a propylene-based copolymer composition, each of which has a high melt tension because it has a long-chain branched structure, exhibits excellent molding processability during molding, such as inflation molding, extrusion molding, blow molding, injection molding or vacuum forming, and is capable of favorably providing a foamed product having an excellent expansion ratio and excellent cell uniformity in the foaming stage. The propylene-based copolymer (A) of the present invention comprises 50 to 95% by mol of constituent units [i] derived from propylene, 4.9 to 49.9% by mol of constituent units [ii] derived from an ?-olefin of 2 to 10 carbon atoms other than propylene and 0.1 to 10% by mol of constituent units [iii] derived from a non-conjugated polyene (with the proviso that the total amount of the constituent units [i], [ii] and [iii] is 100% by mol), and is characterized by satisfying specific requirements (a) and (c).Type: ApplicationFiled: May 17, 2012Publication date: March 27, 2014Inventors: Masahiko Okamoto, Mayumi Yasuda, Tetsuji Kasai, Kazuyoshi Kaneko, Kyoko Kobayashi, Kotaro Ichino
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Patent number: 8318846Abstract: An object of the present invention is to provide an olefin-based thermoplastic elastomer composition that has both weatherability and flexibility at low temperatures, is excellent in fluidity, and causes no stickiness even in the use at high temperatures; a process oil composition for elastomers that serves as the raw material of the thermoplastic elastomer composition and contributes to the above characteristics; and an oil-extended elastomer containing the process oil composition. The process oil composition for elastomers of the present invention has a property that, when 20 parts by weight of the process oil composition for elastomers are blended with respect to 100 parts by weight of a propylene homopolymer, the melting point of the propylene homopolymer is lowered by 2 to 4.5° C. compared to that of the propylene homopolymer without blending.Type: GrantFiled: November 10, 2006Date of Patent: November 27, 2012Assignee: Mitsui Chemicals, Inc.Inventors: Yuichi Ito, Hidenari Nakahama, Kotaro Ichino
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Patent number: 8101254Abstract: The present invention provides a molded product exhibiting excellent various properties by improving compatibility of an ethylene/?-olefin/non-conjugated polyene copolymer with a polyolefin resin and a rubber composition for forming the molded product. The present invention further provides a molded product which comprises a rubber composition, is inhibited from fogging and tackiness and is excellent in mechanical strength and heat aging resistance. The rubber composition of the invention comprises an ethylene/?-olefin/non-conjugated polyene copolymer (A), and a polyolefin resin (B) having Mn of not less than 10,000 and/or an ethylene/?-olefin copolymer (C) having Mn of 2500 to 5000, and satisfies the following requirements: (1) a maximum value and a minimum value of an ethylene distribution parameter P of the component (A) have a relationship of Pmax/Pmin?1.Type: GrantFiled: December 4, 2008Date of Patent: January 24, 2012Assignee: Mitsui Chemicals, Inc.Inventors: Yuji Noguchi, Takashi Hakuta, Hiroki Ebata, Kotaro Ichino, Shuichi Nonaka, Satoshi Hase, Kazuyoshi Kaneko, Akinori Takehara
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Patent number: 7977443Abstract: The invention provides a copolymer rubber excellent in processability in kneading and processability in extrusion; rubber compositions containing the rubber; and crosslinked moldings of the compositions excellent in sealing properties and shape retention. A random copolymer rubber of ethylene (A), a C3-20 ?-olefin (B) and a nonconjugated polyene (C) which satisfies the following requirements (1) to (5): (1) the structural units (A) and (B) are contained at an (A)/(B) molar ratio of 40/60 to 95/5, (2) the structural unit (C) content is 0.01 to 5% by mole, (3) the limiting viscosity [?] is 1.0 to 5.0 dl/g as determined in decahydronaphthalene at 135°., (4) the Mw/Mn is 1 to 8, and (5) the P value is 0.46 to 1.00 as defined by formula (1): P=Ln(limiting viscosity [?])?5.0×105×?*(10) (1) (wherein Ln is a natural logarithm; and ?*(10) is viscosity (Pa·sec) as determined at 190° C. and at 10 rad/sec.Type: GrantFiled: August 9, 2006Date of Patent: July 12, 2011Assignee: Mitsui Chemicals, Inc.Inventors: Kotaro Ichino, Masao Kunizane, Takashi Hakuta
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Publication number: 20100144997Abstract: The invention provides a copolymer rubber excellent in processability in kneading and processability in extrusion; rubber compositions containing the rubber; and crosslinked moldings of the compositions excellent in sealing properties and shape retention. A random copolymer rubber of ethylene (A), a C3-20 ?-olefin (B) and a nonconjugated polyene (C) which satisfies the following requirements (1) to (5): (1) the structural units (A) and (B) are contained at an (A)/(B) molar ratio of 40/60 to 95/5, (2) the structural unit (C) content is 0.01 to 5% by mole, (3) the limiting viscosity [?] is 1.0 to 5.0 dl/g as determined in decalin at 135° C., (4) the Mw/Mn is 1 to 8, and (5) the P value is 0.46 to 1.00 as defined by formula (1): P=Ln(limiting viscosity [?]?5.0×105×?*(10) (1) (wherein Ln is a natural logarithm; and ?*(10) is a viscosity (Pa·sec) as determined at 190° C. and at 10 rad/sec).Type: ApplicationFiled: August 9, 2006Publication date: June 10, 2010Inventors: Kotaro Ichino, Masao Kunizane, Takashi Hakuta
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Publication number: 20090239014Abstract: The present invention provides a molded product exhibiting excellent various properties by improving compatibility of an ethylene/?-olefin/non-conjugated polyene copolymer with a polyolefin resin and a rubber composition for forming the molded product. The present invention further provides a molded product which comprises a rubber composition, is inhibited from fogging and tackiness and is excellent in mechanical strength and heat aging resistance. The rubber composition of the invention comprises an ethylene/?-olefin/non-conjugated polyene copolymer (A), and a polyolefin resin (B) having Mn of not less than 10,000 and/or an ethylene/?-olefin copolymer (C) having Mn of 2500 to 5000, and satisfies the following requirements: (1) a maximum value and a minimum value of an ethylene distribution parameter P of the component (A) have a relationship of Pmax/Pmin?1.Type: ApplicationFiled: December 4, 2008Publication date: September 24, 2009Inventors: Yuji Noguchi, Takashi Hakuta, Hiroki Ebata, Kotaro Ichino, Shuichi Nonaka, Satoshi Hase, Kazuyoshi Kaneko, Akinori Takehara