Patents by Inventor Koichi Kawaguchi
Koichi Kawaguchi 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: 20240309220Abstract: A sparkle coating film contains an infrared-transmissive base plastic and a filler added to the base plastic. The filler includes cold mirror flakes. Each cold mirror flake includes multiple first dielectric layers and multiple second dielectric layers having a refractive index lower than that of the first dielectric layers. The first dielectric layers and the second dielectric layers are laminated alternately. The cold mirror flakes each allow infrared light to pass through while reflecting visible light.Type: ApplicationFiled: February 22, 2024Publication date: September 19, 2024Inventors: Koichi MIYAKE, Hiroaki ANDO, Akira KAWAGUCHI, Koji FUKAGAWA
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Publication number: 20240295634Abstract: A near-infrared transmissive cover is configured to cover an emitting unit and a receiving unit that are included in a near-infrared sensor from the front in an emission direction of near-infrared rays. The near-infrared transmissive cover includes a cover body. A framework of the cover body includes a base including a plate-shaped base body. The cover body includes the base body, a decorative layer that protrudes from the base body, a coating layer that is placed on the base body while covering the decorative layer, and a reflection suppression portion located at a rearmost part in the emission direction of the cover body. The decorative layer is formed by a part of the base or a member different from the base. The decorative layer and the coating layer are respectively made of plastic materials having a difference in refractive index of less than or equal to 0.03.Type: ApplicationFiled: February 16, 2024Publication date: September 5, 2024Inventors: Risa HIRANO, Koji FUKAGAWA, Koichi MIYAKE, Hyogo URAZUMI, Akira KAWAGUCHI
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Patent number: 9580582Abstract: Provided is a thermoplastic resin composition for the inner liner of pneumatic tires, which has low air permeability and a small percent change in air permeability from fatigue. A thermoplastic resin composition obtained by dispersing a modified rubber having an acid anhydride group or an epoxy group into a polyamide resin and an ethylene vinyl alcohol copolymer, the thermoplastic resin composition being characterized in that the ratio of the polyamide resin to the ethylene vinyl alcohol copolymer is between 47/53 and 61/39. The percent change in air permeability of the thermoplastic resin composition in the present invention when subjected 1 million times to 20% elongation strain at room temperature is 1.30 times or more. Additionally, a pneumatic tire using a film comprising the thermoplastic resin composition in the present invention as an inner liner has a percent change in air leakage of 1.30 times or less at room temperature after going 70,000 km.Type: GrantFiled: May 17, 2011Date of Patent: February 28, 2017Assignee: The Yokohama Rubber Co., Ltd.Inventor: Koichi Kawaguchi
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Patent number: 9512313Abstract: Provided is a thermoplastic elastomer composition comprising a polyamide resin and a modified rubber, in which low temperature resistance is improved. The thermoplastic elastomer composition comprising the polyamide resin and the modified rubber having an acid anhydride group or an epoxy group is characterized in that the modified rubber having an acid anhydride group or an epoxy group is modified with a secondary amine. The secondary amine is preferably a compound having a structural formula: R1—NH—R2, in which R1 is a linear alkyl group having 1 to 30 carbon atoms and R2 is a hydrocarbon group having 1 to 30 carbon atoms or a hydrocarbon group having 1 to 30 carbon atoms and having a hydroxyl group, a sulfonyl group, a carbonyl group or an ether bond.Type: GrantFiled: May 20, 2011Date of Patent: December 6, 2016Assignee: The Yokohama Rubber Co., Ltd.Inventors: Koichi Kawaguchi, Yuichi Hara
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Patent number: 9127147Abstract: Provided is a method for producing thermoplastic resin compositions, the method comprising the step of melt-blending (A) a thermoplastic elastomer composition, obtained by dispersing (ii) an acid anhydride-modified or epoxy-modified rubber in (i) an ethylene-vinyl alcohol copolymer, with (B-1) a resin composition comprising at least one resin selected from (i) unmodified polyamide resins and modified polyamide resins or (B-2) a thermoplastic elastomer composition obtained by dispersing (ii) an acid anhydride-modified or epoxy-modified rubber in (i) at least one resin selected from unmodified polyamide resins and modified polyamide resins. Said thermoplastic elastomer composition has excellent gas barrier properties and the decrease in gas barrier properties associated with fatigue has been reduced.Type: GrantFiled: May 19, 2011Date of Patent: September 8, 2015Assignee: The Yokohama Rubber Co., Ltd.Inventors: Koichi Kawaguchi, Yuichi Hara
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Patent number: 9120927Abstract: Disclosed is a process for producing a thermoplastic elastomer composition having a matrix phase comprising a polyamide and an ethylene/vinyl alcohol copolymer and a disperse phase comprising a rubber composition, by which gelation by a reaction between a polyamide and an ethylene/vinyl alcohol copolymer can be inhibited and the dispersion of the rubber composition can be good. In the process, the polyamide resin and the rubber composition are melt-blended to the extent necessary for the rubber composition to form a disperse phase, and then the ethylene/vinyl alcohol copolymer is added and further melt-blended together.Type: GrantFiled: May 23, 2011Date of Patent: September 1, 2015Assignee: The Yokohama Rubber Co., Ltd.Inventors: Shun Sato, Koichi Kawaguchi
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Patent number: 8940835Abstract: Provided is a thermoplastic elastomer composition that can be suitably used for the inner liners of pneumatic tires and exhibits high air barrier properties and high fatigue durability. The present invention is a thermoplastic elastomer composition comprising a thermoplastic resin composition and a rubber composition dispersed in the thermoplastic resin composition, wherein the thermoplastic resin composition comprises a polyamide and an ethylene-vinyl alcohol copolymer or a poly(vinyl alcohol), the rubber composition comprises a halogenated isoolefin-p-alkylstyrene copolymer and is cross inked. The thermoplastic resin composition preferably comprises 1 to 25% by weight of the ethylene-vinyl alcohol copolymer or the poly(vinyl alcohol). The thermoplastic elastomer composition preferably comprises 100 parts by weight of the thermoplastic resin composition and 80 to 200 parts by weight of the halogenated isoolefin-p-alkylstyrene copolymer.Type: GrantFiled: May 17, 2011Date of Patent: January 27, 2015Assignee: The Yokohama Rubber Co., Ltd.Inventors: Shusaku Tomoi, Koichi Kawaguchi
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Patent number: 8536271Abstract: An object of the present invention is, in a thermoplastic elastomer composition in which a modified rubber is dispersed and filled in an ethylene-vinyl alcohol copolymer matrix in order to improve the low-temperature durability of the ethylene-vinyl alcohol copolymer, to reduce the extrusion load during extrusion molding thereof into a film without deteriorating the low-temperature durability. The present invention is a thermoplastic elastomer composition comprising an ethylene-vinyl alcohol copolymer (A) and a modified rubber (B) dispersed in the ethylene-vinyl alcohol copolymer (A), wherein the modified rubber (B) has an acid anhydride group or epoxy group and is dynamically cross-linked by a compound (C) having at least two amino groups. This thermoplastic elastomer composition can be suitably used in the production of an inner liner of a pneumatic tire.Type: GrantFiled: August 2, 2010Date of Patent: September 17, 2013Assignee: The Yokohama Rubber Co., Ltd.Inventors: Koichi Kawaguchi, Naoyuki Morooka
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Publication number: 20130156982Abstract: A method for producing a thermoplastic resin composition, comprising the steps of: (I) melt-kneading (A) acid anhydride-modified or epoxy-modified rubber with (B) ethylene-vinylalcohol copolymer resin to prepare a first resin composition in which (A) acid anhydride-modified or epoxy-modified rubber is dispersed in (B) ethylene-vinylalcohol copolymer resin, (II) crosslinking (C) crosslinkable elastomer while melt-kneading the crosslinkable elastomer with (D) polyamide resin to prepare a second resin composition in which crosslinked elastomer particles are dispersed in (D) polyamide resin, and (III) melt-mixing together the first resin composition with the second resin composition. The thermoplastic resin composition has excellent gas barrier properties, low-temperature durability, and fatigue resistance.Type: ApplicationFiled: May 18, 2011Publication date: June 20, 2013Applicant: The Yokohama Rubber Co., Ltd.Inventors: Koichi Kawaguchi, Yuichi Hara
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Publication number: 20130146194Abstract: Provided is a thermoplastic resin composition for the inner liner of pneumatic tires, which has low air permeability and a small percent change in air permeability from fatigue. A thermoplastic resin composition obtained by dispersing a modified rubber having an acid anhydride group or an epoxy group into a polyamide resin and an ethylene vinyl alcohol copolymer, the thermoplastic resin composition being characterized in that the ratio of the polyamide resin to the ethylene vinyl alcohol copolymer is between 47/53 and 61/39. The percent change in air permeability of the thermoplastic resin composition in the present invention when subjected 1 million times to 20% elongation strain at room temperature is 1.30 times or more. Additionally, a pneumatic tire using a film comprising the thermoplastic resin composition in the present invention as an inner liner has a percent change in air leakage of 1.30 times or less at room temperature after going 70,000 km.Type: ApplicationFiled: May 17, 2011Publication date: June 13, 2013Applicant: The Yokohama Rubber Co., Ltd.Inventor: Koichi Kawaguchi
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Publication number: 20130144010Abstract: Provided is a method for producing thermoplastic resin compositions, the method comprising the step of melt-blending (A) a thermoplastic elastomer composition, obtained by dispersing (ii) an acid anhydride-modified or epoxy-modified rubber in (i) an ethylene-vinyl alcohol copolymer, with (B-1) a resin composition comprising at least one resin selected from (i) unmodified polyamide resins and modified polyamide resins or (B-2) a thermoplastic elastomer composition obtained by dispersing (ii) an acid anhydride-modified or epoxy-modified rubber in (i) at least one resin selected from unmodified polyamide resins and modified polyamide resins. Said thermoplastic elastomer composition has excellent gas barrier properties and the decrease in gas barrier properties associated with fatigue has been reduced.Type: ApplicationFiled: May 19, 2011Publication date: June 6, 2013Applicant: THE YOKOHAMA RUBBER CO., LTD.Inventors: Koichi Kawaguchi, Yuichi Hara
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Patent number: 8378035Abstract: An object of the present invention is, in a thermoplastic elastomer composition in which a modified rubber is filled and dispersed in a polyamide resin matrix in order to improve the low-temperature durability of the polyamide resin, to reduce the extrusion load during extrusion molding thereof into a film without deteriorating the low-temperature durability. The present invention is a thermoplastic elastomer composition (E) comprising a modified polyamide resin (C) and a modified rubber (D) dispersed in the modified polyamide resin (C), the modified polyamide resin (C) being a resin obtained by melt-blending an polyamide resin (A) and a compound (B) capable of reacting with a terminal amino group of a polyamide resin, wherein the modified rubber (D) has an acid anhydride group or epoxy group and is dynamically cross-linked by a compound (F) having at least one disulfide bond and at least two amino groups.Type: GrantFiled: August 2, 2010Date of Patent: February 19, 2013Assignee: The Yokohama Rubber Co., Ltd.Inventors: Koichi Kawaguchi, Naoyuki Morooka
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Publication number: 20130025757Abstract: Provided is a thermoplastic elastomer composition that can be suitably used for the inner liners of pneumatic tires and exhibits high air barrier properties and high fatigue durability. The present invention is a thermoplastic elastomer composition comprising a thermoplastic resin composition and a rubber composition dispersed in the thermoplastic resin composition, wherein the thermoplastic resin composition comprises a polyamide and an ethylene-vinyl alcohol copolymer or a poly(vinyl alcohol), the rubber composition comprises a halogenated isoolefin-p-alkylstyrene copolymer and is cross inked. The thermoplastic resin composition preferably comprises 1 to 25% by weight of the ethylene-vinyl alcohol copolymer or the poly(vinyl alcohol). The thermoplastic elastomer composition preferably comprises 100 parts by weight of the thermoplastic resin composition and 80 to 200 parts by weight of the halogenated isoolefin-p-alkylstyrene copolymer.Type: ApplicationFiled: May 17, 2011Publication date: January 31, 2013Applicant: The Yokohama Rubber Co., Ltd.Inventors: Shusaku Tomoi, Koichi Kawaguchi
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Publication number: 20120301652Abstract: Provided is a thermoplastic elastomer composition comprising a polyamide resin and a modified rubber, in which low temperature resistance is improved. The thermoplastic elastomer composition comprising the polyamide resin and the modified rubber having an acid anhydride group or an epoxy group is characterized in that the modified rubber having an acid anhydride group or an epoxy group is modified with a secondary amine. The secondary amine is preferably a compound having a structural formula: R1—NH—R2, in which R1 is a linear alkyl group having 1 to 30 carbon atoms and R2 is a hydrocarbon group having 1 to 30 carbon atoms or a hydrocarbon group having 1 to 30 carbon atoms and having a hydroxyl group, a sulfonyl group, a carbonyl group or an ether bond.Type: ApplicationFiled: May 20, 2011Publication date: November 29, 2012Applicant: THE YOKOHAMA RUBBER CO.,LTD.Inventors: Koichi Kawaguchi, Yuichi Hara
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Publication number: 20120214943Abstract: Disclosed is a process for producing a thermoplastic elastomer composition having a matrix phase comprising a polyamide and an ethylene/vinyl alcohol copolymer and a disperse phase comprising a rubber composition, by which gelation by a reaction between a polyamide and an ethylene/vinyl alcohol copolymer can be inhibited and the dispersion of the rubber composition can be good. In the process, the polyamide resin and the rubber composition are melt-blended to the extent necessary for the rubber composition to form a disperse phase, and then the ethylene/vinyl alcohol copolymer is added and further melt-blended together.Type: ApplicationFiled: May 23, 2011Publication date: August 23, 2012Applicant: The Yokohama Rubber Co., Ltd.Inventors: Shun Sato, Koichi Kawaguchi
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Publication number: 20110028648Abstract: An object of the present invention is, in a thermoplastic elastomer composition in which a modified rubber is dispersed and filled in an ethylene-vinyl alcohol copolymer matrix in order to improve the low-temperature durability of the ethylene-vinyl alcohol copolymer, to reduce the extrusion load during extrusion molding thereof into a film without deteriorating the low-temperature durability. The present invention is a thermoplastic elastomer composition comprising an ethylene-vinyl alcohol copolymer (A) and a modified rubber (B) dispersed in the ethylene-vinyl alcohol copolymer (A), wherein the modified rubber (B) has an acid anhydride group or epoxy group and is dynamically cross-linked by a compound (C) having at least two amino groups. This thermoplastic elastomer composition can be suitably used in the production of an inner liner of a pneumatic tire.Type: ApplicationFiled: August 2, 2010Publication date: February 3, 2011Applicant: The Yokohama Rubber Co., Ltd.Inventors: Koichi KAWAGUCHI, Naoyuki MOROOKA
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Publication number: 20110028651Abstract: An object of the present invention is, in a thermoplastic elastomer composition in which a modified rubber is filled and dispersed in a polyamide resin matrix in order to improve the low-temperature durability of the polyamide resin, to reduce the extrusion load during extrusion molding thereof into a film without deteriorating the low-temperature durability. The present invention is a thermoplastic elastomer composition (E) comprising a modified polyamide resin (C) and a modified rubber (D) dispersed in the modified polyamide resin (C), the modified polyamide resin (C) being a resin obtained by melt-blending an polyamide resin (A) and a compound (B) capable of reacting with a terminal amino group of a polyamide resin, wherein the modified rubber (D) has an acid anhydride group or epoxy group and is dynamically cross-linked by a compound (F) having at least one disulfide bond and at least two amino groups.Type: ApplicationFiled: August 2, 2010Publication date: February 3, 2011Applicant: The Yokohama Rubber Co., Ltd.Inventors: Koichi Kawaguchi, Naoyuki Morooka
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Patent number: 7413397Abstract: A work vehicle with a front loader is disclosed. The work vehicle includes a traveling control section having an operator's seat, a hood provided forwardly of the traveling control section, a pair of masts provided on right and left sides of the hood, a pair of booms projecting forwardly from upper ends of the masts and an implement detachably connected to the booms. An upper face of the hood is inclined downwardly from its rear upper portion to its front upper portion. The inclined upper face is located adjacent a downward line of sight from an operator's space in the traveling control section to a connecting portion between each boom and the implement.Type: GrantFiled: March 9, 2005Date of Patent: August 19, 2008Assignee: Kubota CorporationInventors: Naoya Muramoto, Arinobu Ishida, Masataka Takagi, Masayuki Nakano, Koichi Kawaguchi
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Patent number: 7300241Abstract: An attachment construction for attaching a front loader having booms to a front of a tractor vehicle body is disclosed. The construction includes a pair of support tables projecting from the front portion of the tractor body to the right and left outer sides thereof, an engine constituting the vehicle body being disposed forwardly of the support tables, a front axle frame being secured to right and left sides of the engine, a pair of main frames disposed erect on the respective support tables for supporting the booms, and a pair of attaching brackets secured to right/left inner ends of the respective support tables for attaching the support tables to the vehicle body. Each attaching bracket includes a front attaching portion secured to the front axle frame and a rear attaching portion projecting rearwardly of the support table associated therewith and secured to a fore-and-aft intermediate portion of the vehicle body.Type: GrantFiled: March 1, 2005Date of Patent: November 27, 2007Assignee: Kubota CorporationInventors: Hiroki Fukudome, Koichi Kawaguchi, Kiyokazu Nakanishi
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Publication number: 20060073003Abstract: An attachment construction for attaching a front loader having booms to a front of a tractor vehicle body is disclosed. The construction includes a pair of support tables projecting from the front portion of the tractor body to the right and left outer sides thereof, an engine constituting the vehicle body being disposed forwardly of the support tables, a front axle frame being secured to right and left sides of the engine, a pair of main frames disposed erect on the respective support tables for supporting the booms, and a pair of attaching brackets secured to right/left inner ends of the respective support tables for attaching the support tables to the vehicle body. Each attaching bracket includes a front attaching portion secured to the front axle frame and a rear attaching portion projecting rearwardly of the support table associated therewith and secured to a fore-and-aft intermediate portion of the vehicle body.Type: ApplicationFiled: March 1, 2005Publication date: April 6, 2006Applicant: KUBOTA CORPORATIONInventors: Hiroki Fukudome, Koichi Kawaguchi, Kiyokazu Nakanishi