Patents by Inventor Kouta Isoyama
Kouta Isoyama 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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Patent number: 9873238Abstract: Disclosed is an inner liner for a pneumatic tire, the inner liner including no less than 8 resin-layers, the resin-layer having a layer A constituted with a resin composition containing a gas barrier resin, and a layer B constituted with a resin composition containing an elastomer, at least one of the resin compositions included in the layer A and the layer B that are adjacent with each other containing a metal salt, the content of the metal salt being no less than 1 ppm and no greater than 10,000 ppm in terms of metal element equivalent, and an interlayer adhesive force between the layer A and the layer B being no less than 500 g/15 mm. The layer A and the layer B are preferably alternately laminated.Type: GrantFiled: November 30, 2010Date of Patent: January 23, 2018Assignees: KURARAY CO., LTD., Bridgestone CorporationInventors: Shinji Tai, Hiroshi Kawai, Satoshi Yamakoshi, Kouta Isoyama, Masao Hikasa, Yuwa Takahashi, Hideki Kitano, Tetsuo Amamoto, Takatsugu Tanaka
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Patent number: 9744748Abstract: An object of the invention is to provide a multilayered structure having very superior gas barrier properties and being excellent in flex resistance, pinhole resistance, stretchability, thermoformability and interlayer adhesiveness, and having superior durability enabling characteristics such as high gas barrier properties to be maintained even if used with deformation such as flexion and/or stretching, and to provide a laminate in which the multilayered structure is used, and a production method thereof. Provided by the present invention is a multilayered structure in which at least 4 resin-layers constituted with a resin composition containing an ethylene-vinyl alcohol copolymer are contiguously laminated. A single layer of the resin layer has an average thickness of preferably no less than 0.01 ?m and no greater than 10 ?m. The average thickness is preferably no less than 0.1 ?m and no greater than 1,000 ?m.Type: GrantFiled: March 30, 2011Date of Patent: August 29, 2017Assignee: KURARAY CO., LTD.Inventors: Shinji Tai, Hiroshi Kawai, Satoshi Yamakoshi, Kouta Isoyama, Masao Hikasa
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Patent number: 9186873Abstract: Disclosed is a multilayered structure that includes no less than 8 resin-layers, the resin-layer including a layer A constituted with a resin composition containing a gas barrier resin, and a layer B constituted with a resin composition containing a thermoplastic resin, at least one of the resin compositions included in the layer A and the layer B that are adjacent with each other containing a metal salt, the content of the metal salt being no less than 1 ppm and no greater than 10,000 ppm in terms of metal element equivalent, and an interlayer adhesive force between the layer A and the layer B being no less than 450 g/15 mm. The layer A and the layer B may be alternately laminated. Moreover, the average thickness of single layer of at least one selected from the layer A and the layer B is preferably no less than 0.01 ?m and no greater than 10 ?m.Type: GrantFiled: November 30, 2010Date of Patent: November 17, 2015Assignee: KURARAY CO., LTD.Inventors: Shinji Tai, Hiroshi Kawai, Satoshi Yamakoshi, Kouta Isoyama, Masao Hikasa, Kentaro Yoshida
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Patent number: 8877865Abstract: A resin composition, contains: a thermoplastic polyurethane (A); a thermoplastic polyurethane (B); and an ethylene-vinyl alcohol copolymer (C), wherein an isocyanate group content (mole) in raw materials of the thermoplastic polyurethane (A) is greater than a hydroxyl group content (mole) therein, an isocyanate group content (mole) in raw materials of the thermoplastic polyurethane (B) is nearly equal to a hydroxyl group content (mole) therein, and the thermoplastic polyurethane (B) and the ethylene-vinyl alcohol copolymer (C) have a mass ratio (B/C) of from 70/30 to 99/1 and a content of the thermoplastic polyurethane (A), based on 100 parts by mass of a total of the thermoplastic polyurethane (B) and the ethylene-vinyl alcohol copolymer (C), is from 1 to 30 parts by mass. Thus, a resin composition is provided that contains thermoplastic polyurethanes and an ethylene-vinyl alcohol copolymer and is good in melt shapability.Type: GrantFiled: March 29, 2010Date of Patent: November 4, 2014Assignee: Kuraray Co., Ltd.Inventors: Kouta Isoyama, Tatsuya Oshita, Hidekazu Saitou, Hiroyuki Ono
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Publication number: 20130017383Abstract: An object of the invention is to provide a multilayered structure having very superior gas barrier properties and being excellent in flex resistance, pinhole resistance, stretchability, thermoformability and interlayer adhesiveness, and having superior durability enabling characteristics such as high gas barrier properties to be maintained even if used with deformation such as flexion and/or stretching, and to provide a laminate in which the multilayered structure is used, and a production method thereof. Provided by the present invention is a multilayered structure in which at least 4 resin-layers constituted with a resin composition containing an ethylene-vinyl alcohol copolymer are contiguously laminated. A single layer of the resin layer has an average thickness of preferably no less than 0.01 ?m and no greater than 10 ?m. The average thickness is preferably no less than 0.1 ?m and no greater than 1,000 ?m.Type: ApplicationFiled: March 30, 2011Publication date: January 17, 2013Inventors: Shinji Tai, Hiroshi Kawai, Satoshi Yamakoshi, Kouta Isoyama, Masao Hikasa
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Patent number: 8329818Abstract: Provided is a modified ethylene-vinyl alcohol copolymer (C) having an ethylen content of 5 to 55 mol %, which contains a specific structural unit (I) in an amount of 0.3 to 40 mol % and may be obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) having a molecular weight of not more than 500. This can be produced by a method for producing the modified ethylene-vinyl alcohol copolymer (C) which comprises melting and kneading an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) in an extruder. The modified ethylene-vinyl alcohol copolymer (C) is superior to a unmodified ethylene-vinyl alcohol copolymer (A) in transparency, stretchability, flexibility and flexing resistance due to the specific structural unit (I) incorporated therein, and thus, can be used as a barrier material in various applications requiring the above performance capabilities.Type: GrantFiled: May 10, 2010Date of Patent: December 11, 2012Assignee: Kuraray Co., Ltd.Inventors: Kaoru Ikeda, Shinji Tai, Kouta Isoyama, Tomoyuki Watanabe
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Publication number: 20120237742Abstract: Disclosed is an inner liner for a pneumatic tire, the inner liner including no less than 8 resin-layers, the resin-layer having a layer A constituted with a resin composition containing a gas barrier resin, and a layer B constituted with a resin composition containing an elastomer, at least one of the resin compositions included in the layer A and the layer B that are adjacent with each other containing a metal salt, the content of the metal salt being no less than 1 ppm and no greater than 10,000 ppm in terms of metal element equivalent, and an interlayer adhesive force between the layer A and the layer B being no less than 500 g/15 mm. The layer A and the layer B are preferably alternately laminated.Type: ApplicationFiled: November 30, 2010Publication date: September 20, 2012Applicants: BRIDGESTONE CORPORATION, KURARAY CO., LTD.Inventors: Shinji Tai, Hiroshi Kawai, Satoshi Yamakoshi, Kouta Isoyama, Masao Hikasa, Yuwa Takahashi, Hideki Kitano, Tetsuo Amamoto, Takatsugu Tanaka
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Publication number: 20120237747Abstract: Disclosed is a multilayered structure that includes no less than 8 resin-layers, the resin-layer including a layer A constituted with a resin composition containing a gas barrier resin, and a layer B constituted with a resin composition containing a thermoplastic resin, at least one of the resin compositions included in the layer A and the layer B that are adjacent with each other containing a metal salt, the content of the metal salt being no less than 1 ppm and no greater than 10,000 ppm in terms of metal element equivalent, and an interlayer adhesive force between the layer A and the layer B being no less than 450 g/15 mm. The layer A and the layer B may be alternately laminated. Moreover, the average thickness of single layer of at least one selected from the layer A and the layer B is preferably no less than 0.01 ?m and no greater than 10 ?m.Type: ApplicationFiled: November 30, 2010Publication date: September 20, 2012Applicant: KURARAY CO., LTD.Inventors: Shinji Tai, Hiroshi Kawai, Satoshi Yamakoshi, Kouta Isoyama, Masao Hikasa, Kentaro Yoshida
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Publication number: 20120045653Abstract: A resin composition, contains: a thermoplastic polyurethane (A); a thermoplastic polyurethane (B); and an ethylene-vinyl alcohol copolymer (C), wherein an isocyanate group content (mole) in raw materials of the thermoplastic polyurethane (A) is greater than a hydroxyl group content (mole) therein, an isocyanate group content (mole) in raw materials of the thermoplastic polyurethane (B) is nearly equal to a hydroxyl group content (mole) therein, and the thermoplastic polyurethane (B) and the ethylene-vinyl alcohol copolymer (C) have a mass ratio (B/C) of from 70/30 to 99/1 and a content of the thermoplastic polyurethane (A), based on 100 parts by mass of a total of the thermoplastic polyurethane (B) and the ethylene-vinyl alcohol copolymer (C), is from 1 to 30 parts by mass. Thus, a resin composition is provided that contains thermoplastic polyurethanes and an ethylene-vinyl alcohol copolymer and is good in melt shapability.Type: ApplicationFiled: March 29, 2010Publication date: February 23, 2012Applicant: KURARAY CO., LTD.Inventors: Kouta Isoyama, Tatsuya Oshita, Hidekazu Saitou, Hiroyuki Ono
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Patent number: 8084536Abstract: A resin composition is provided which comprises from 50 to 95% by weight of a modified ethylene-vinyl alcohol copolymer (C) obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monovalent epoxy compound (B) having a molecular weight of 500 or less, and from 5 to 50% by weight of a soft resin (F) that has at least one functional group able to react with a hydroxyl group and has a Young's modulus at 23° C., 50% RH of 500 MPa or less, wherein the soft resin (F) is dispersed with an average particle diameter of 0.1 ?m or less in a matrix of the modified ethylene-vinyl alcohol copolymer (C). This resin composition is excellent in barrier properties and also in flex resistance and impact resistance at low temperature.Type: GrantFiled: January 11, 2006Date of Patent: December 27, 2011Assignee: Kuraray Co., Ltd.Inventors: Kouta Isoyama, Hiroyuki Shindome, Naoki Kataoka, Tomoyuki Watanabe
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Publication number: 20110024015Abstract: An object of the present invention is to provide: a film which is applicable to a tire, has excellent gas barrier properties and bending resistance, allows weight of a tire to be reduced with improving internal pressure retainability of the tire at both the brand-new stage and the used stage thereof, and is capable of demonstrating good gas barrier properties without breaking especially in a running condition at a relatively low temperature in winter time or the like; an inner liner for tire, using the film; and a tire provided with the inner liner for tire. The film of the present invention comprises at least a layer composed of resin composition (D) produced by dispersing viscoelastic substance (C) in a resin containing modified ethylene-vinyl alcohol copolymer (B) obtained by subjecting ethylene-vinyl alcohol copolymer (A) to a reaction, wherein 100% modulus at ?30° C. of the viscoelastic substance (C) is smaller than 6 MPa.Type: ApplicationFiled: March 31, 2009Publication date: February 3, 2011Applicants: BRIDGESTONE CORPORATION, KURARAY CO., LTDInventors: Yuwa Takahashi, Daisuke Nohara, Daisuke Nakagawa, Kouta Isoyama
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Publication number: 20100280178Abstract: Provided is a modified ethylene-vinyl alcohol copolymer (C) having an ethylen content of 5 to 55 mol %, which contains a specific structural unit (I) in an amount of 0.3 to 40 mol % and may be obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) having a molecular weight of not more than 500. This can be produced by a method for producing the modified ethylene-vinyl alcohol copolymer (C) which comprises melting and kneading an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) in an extruder. The modified ethylene-vinyl alcohol copolymer (C) is superior to a unmodified ethylene-vinyl alcohol copolymer (A) in transparency, stretchability, flexibility and flexing resistance due to the specific structural unit (I) incorporated therein, and thus, can be used as a barrier material in various applications requiring the above performance capabilities.Type: ApplicationFiled: May 10, 2010Publication date: November 4, 2010Applicant: Kuraray Co., Ltd.Inventors: Kaoru IKEDA, Shinji Tai, Kouta Isoyama, Tomoyuki Watanabe
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Patent number: 7811646Abstract: Provided is a modified ethylene-vinyl alcohol copolymer (C) having an ethylen content of 5 to 55 mol %, which contains a specific structural unit (I) in an amount of 0.3 to 40 mol % and may be obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) having a molecular weight of not more than 500. This can be produced by a method for producing the modified ethylene-vinyl alcohol copolymer (C) which comprises melting and kneading an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) in an extruder. The modified ethylene-vinyl alcohol copolymer (C) is superior to a unmodified ethylene-vinyl alcohol copolymer (A) in transparency, stretchability, flexibility and flexing resistance due to the specific structural unit (I) incorporated therein, and thus, can be used as a barrier material in various applications requiring the above performance capabilities.Type: GrantFiled: May 13, 2002Date of Patent: October 12, 2010Assignee: Kuraray Co., Ltd.Inventors: Kaoru Ikeda, Shinji Tai, Kouta Isoyama, Tomoyuki Watanabe
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Patent number: 7600546Abstract: Disclosed is an innerliner for pneumatic tires, wherein the innerliner comprises a modified ethylene-vinyl alcohol copolymer (C) obtained by reacting 1-50 parts by weight of an epoxy compound (B) with 100 parts by weight of an ethylene-vinyl alcohol copolymer (A) having an ethylene content of 25-50 mol %. A pneumatic tire with the innerliner can greatly improve the internal pressure retainabilities before and after driving without increasing the weight of the tire.Type: GrantFiled: October 27, 2003Date of Patent: October 13, 2009Assignees: Bridgestone Corporation, Kuraray Co., Ltd.Inventors: Kentaro Fujino, Shinji Tai, Kaoru Ikeda, Tomoyuki Watanabe, Kouta Isoyama
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Publication number: 20090220718Abstract: Provided is a fuel container containing a biodiesel fuel comprising at least one fatty acid ester selected from the group consisting of fatty acid methyl esters and fatty acid ethyl esters, wherein the fuel container is made of a multilayer structure wherein layers of high density polyethylene (a) are located on both sides of a layer of an ethylene-vinyl alcohol copolymer (c) via layers of adhesive resin (b). This fuel container is excellent in barrier performance and brittle degradation resistance against biodiesel fuels.Type: ApplicationFiled: February 29, 2008Publication date: September 3, 2009Applicant: KURARAY CO. LTD.Inventors: Kouta Isoyama, W. Ronald Rose, Robert Chvala
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Patent number: 7534829Abstract: Provided is a resin composition comprising 1-99% by weight of a modified ethylene-vinyl alcohol copolymer (C) having an ethylene content of 5-55 mol %, which contains a specific structural unit (I) in an amount of 0.3-40 mol % and can be obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) having a molecular weight of not more than 500, and 1-99% by weight of a thermoplastic resin (T1) other than (C). Moreover, a multilayer structure in which the resin composition and a thermoplastic resin (T2) are laminated is also provided. Thus, a resin composition superior in barrier properties, transparency, stretchability, flexibility, flexing resistance and interlayer adhesiveness and various kinds of molded articles made thereof are provided.Type: GrantFiled: February 20, 2003Date of Patent: May 19, 2009Assignee: Kuraray Co., Ltd.Inventors: Shinji Tai, Kaoru Ikeda, Haruhisa Masuda, Tomoyuki Watanabe, Kouta Isoyama
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Publication number: 20090012236Abstract: A resin composition is provided which comprises from 50 to 95% by weight of a modified ethylene-vinyl alcohol copolymer (C) obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monovalent epoxy compound (B) having a molecular weight of 500 or less, and from 5 to 50% by weight of a soft resin (F) that has at least one functional group able to react with a hydroxyl group and has a Young's modulus at 23° C., 50% RH of 500 MPa or less, wherein the soft resin (F) is dispersed with an average particle diameter of 0.1 ?m or less in a matrix of the modified ethylene-vinyl alcohol copolymer (C). This resin composition is excellent in barrier properties and also in flex resistance and impact resistance at low temperature.Type: ApplicationFiled: January 11, 2006Publication date: January 8, 2009Applicant: Kuraray Co., Ltd.Inventors: Kouta Isoyama, Hiroyuki Shindome, Naoki Kataoka, Tomoyuki Watanabe
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Publication number: 20050147778Abstract: Provided is a resin composition comprising 1-99% by weight of a modified ethylene-vinyl alcohol copolymer (C) having an ethylene content of 5-55 mol %, which contains a specific structural unit (I) in an amount of 0.3-40 mol % and can be obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) having a molecular weight of not more than 500, and 1-99% by weight of a thermoplastic resin (T1) other than (C). Moreover, a multilayer structure in which the resin composition and a thermoplastic resin (T2) are laminated is also provided. Thus, a resin composition superior in barrier properties, transparency, stretchability, flexibility, flexing resistance and interlayer adhesiveness and various kinds of molded articles made thereof are provided.Type: ApplicationFiled: February 20, 2003Publication date: July 7, 2005Inventors: Shinji Tai, Kaoru Ikeda, Haruhisa Masuda, Tomoyuki Watanabe, Kouta Isoyama
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Publication number: 20040096683Abstract: Provided is a modified ethylene-vinyl alcohol copolymer (C) having an ethylen content of 5 to 55 mol %, which contains a specific structural unit (I) in an amount of 0.3 to 40 mol % and may be obtained by reacting an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) having a molecular weight of not more than 500. This can be produced by a method for producing the modified ethylene-vinyl alcohol copolymer (C) which comprises melting and kneading an ethylene-vinyl alcohol copolymer (A) with a monofunctional epoxy compound (B) in an extruder. The modified ethylene-vinyl alcohol copolymer (C) is superior to a unmodified ethylene-vinyl alcohol copolymer (A) in transparency, stretchability, flexibility and flexing resistance due to the specific structural unit (I) incorporated therein, and thus, can be used as a barrier material in various applications requiring the above performance capabilities.Type: ApplicationFiled: November 14, 2003Publication date: May 20, 2004Inventors: Kaoru Ikeda, Shinji Tai, Kouta Isoyama, Tomoyuki Watanabe
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Publication number: 20040089388Abstract: Disclosed is an innerliner for pneumatic tires, wherein the innerliner comprises a modified ethylene-vinyl alcohol copolymer (C) obtained by reacting 1-50 parts by weight of an epoxy compound (B) with 100 parts by weight of an ethylene-vinyl alcohol copolymer (A) having an ethylene content of 25-50 mol %. A pneumatic tire with the innerliner can greatly improve the internal pressure retainabilities before and after driving without increasing the weight of the tire.Type: ApplicationFiled: October 27, 2003Publication date: May 13, 2004Applicants: Bridgestone Corporation, Kuraray Co., Ltd.Inventors: Kentaro Fujino, Shinji Tai, Kaoru Ikeda, Tomoyuki Watanabe, Kouta Isoyama