Patents by Inventor Shinji Tai

Shinji Tai 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).

  • Patent number: 10975236
    Abstract: Provided is a resin mixture, comprising: polyolefin (A); a saponified ethylene-vinyl acetate copolymer (B); and an acid modified olefin-vinyl carboxylate copolymer (C), wherein the acid modified olefin-vinyl carboxylate copolymer (C) has an olefin content of from 50 to 95 mol %, and a difference between an ethylene content of the saponified ethylene-vinyl acetate copolymer (B) and the olefin content of the acid modified olefin-vinyl carboxylate copolymer (C) is within a range of from 20 to 70 mol %. This enables to provide a resin mixture that contains polyolefin and an EVOH, and even in continuous melt molding over a long period of time, has a less amount of screw buildup of a degraded material and also is reduced in generation of fish-eyes, cords, and streaks in a molded product obtained therefrom.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: April 13, 2021
    Assignee: KURARAY CO., LTD.
    Inventors: Takeyuki Igarashi, Shinji Tai
  • Patent number: 10611905
    Abstract: An object is to provide a crosslinkable resin composition capable of forming a crosslinked product that has excellent hot water resistance and bending resistance. The present invention provides a resin composition containing an ethylene-vinyl alcohol copolymer (A), a flexible resin (B), and a crosslinking agent (C) having two or more polymerizable groups, with the crosslinking agent (C) in an amount of 0.5 to 10 parts by mass relative to a total 100 parts by mass of the ethylene-vinyl alcohol copolymer (A) and the flexible resin (B), the flexible resin (B) being a styrene thermoplastic elastomer or an ?-olefin polymer, and the resin composition having a mass ratio [(A)/(B)] between the ethylene-vinyl alcohol copolymer (A) and the flexible resin (B) of 90/10 to 65/35.
    Type: Grant
    Filed: May 18, 2018
    Date of Patent: April 7, 2020
    Assignee: KURARAY CO., LTD.
    Inventors: Kentaro Yoshida, Shinji Tai
  • Patent number: 10329411
    Abstract: A resin composition, containing: (A) polyolefin; (B) a saponified ethylene-vinyl acetate copolymer having an ethylene content of from 20 to 65 mol % and a degree of saponification of vinyl acetate units of 96% or more; (C) a saponified ethylene-vinyl acetate copolymer having an ethylene content of from 68 to 98 mol % and a degree of saponification of vinyl acetate units of 20% or more; (D) a random copolymer consisting of ethylene and vinyl acetate; (E) a pigment comprising titanium oxide particles comprising a surface coated with a compound of a metal other than titanium or a silicon compound; and (I) a lubricant; wherein a mass ratio (AB) is from 3 to 99.5, a mass ratio (B/C) is from 1 to 100, a mass ratio of (D/C) is from 0.1 to 15, a mass ratio (E/C) is from 0.04 to 50, and a content of (C) is from 0.01 to 2.4 parts, particularly 0.33 to 1.5 parts, by mass based on 100 parts by mass of (A) and (B).
    Type: Grant
    Filed: March 25, 2011
    Date of Patent: June 25, 2019
    Assignee: KURARAY CO., LTD.
    Inventors: Takeyuki Igarashi, Yasuhiko Haneda, Masahiro Kitamura, Shinji Tai
  • Publication number: 20180340060
    Abstract: An object is to provide a crosslinkable resin composition capable of forming a crosslinked product that has excellent hot water resistance and bending resistance. The present invention provides a resin composition containing an ethylene-vinyl alcohol copolymer (A), a flexible resin (B), and a crosslinking agent (C) having two or more polymerizable groups, with the crosslinking agent (C) in an amount of 0.5 to 10 parts by mass relative to a total 100 parts by mass of the ethylene-vinyl alcohol copolymer (A) and the flexible resin (B), the flexible resin (B) being a styrene thermoplastic elastomer or an ?-olefin polymer, and the resin composition having a mass ratio [(A)/(B)] between the ethylene-vinyl alcohol copolymer (A) and the flexible resin (B) of 90/10 to 65/35.
    Type: Application
    Filed: May 18, 2018
    Publication date: November 29, 2018
    Applicant: KURARAY CO., LTD.
    Inventors: Kentaro Yoshida, Shinji Tai
  • Patent number: 10076932
    Abstract: A multilayered structure having a layer A constituted with a resin composition containing a gas barrier resin, and a layer B being adjacent to the layer A and being constituted with a resin composition containing an elastomer. The total number of the layer A and the layer B is at least 7. The average thickness of the layer A in terms of a single layer is no less than 0.001 ?m and no greater than 10 ?m, and the average thickness of the layer B in terms of a single layer is no less than 0.001 ?m and no greater than 40 ?m. The multilayered structure is formed by irradiating with an active energy ray. Furthermore, an inner liner having the multilayered structure, and a pneumatic tire provided with the inner liner are provided.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: September 18, 2018
    Assignees: Kuraray Co., Ltd., BRIDGESTONE CORPORATION
    Inventors: Yuwa Takahashi, Shinji Tai, Masao Hikasa, Hideki Kitano, Tetsuo Amamoto, Takatsugu Tanaka
  • Patent number: 9873238
    Abstract: 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: Grant
    Filed: November 30, 2010
    Date of Patent: January 23, 2018
    Assignees: KURARAY CO., LTD., Bridgestone Corporation
    Inventors: Shinji Tai, Hiroshi Kawai, Satoshi Yamakoshi, Kouta Isoyama, Masao Hikasa, Yuwa Takahashi, Hideki Kitano, Tetsuo Amamoto, Takatsugu Tanaka
  • Patent number: 9744748
    Abstract: 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: Grant
    Filed: March 30, 2011
    Date of Patent: August 29, 2017
    Assignee: KURARAY CO., LTD.
    Inventors: Shinji Tai, Hiroshi Kawai, Satoshi Yamakoshi, Kouta Isoyama, Masao Hikasa
  • Patent number: 9452575
    Abstract: The invention provides novel processes for producing in-mold labeled containers and the containers produced using such processes. The processes involve setting a multilayered label having an oxygen barrier layer into a mold and injecting a melted resin suitable for forming a container into the mold. The process forms a container with an oxygen barrier layer. In preferred embodiments, the multilayered label has at least an oxygen absorbing resin layer containing ethylene-vinyl alcohol copolymer and an oxygen absorbent and the container is retortable.
    Type: Grant
    Filed: July 5, 2011
    Date of Patent: September 27, 2016
    Assignees: Nestec S.A., Kuraray Co. Ltd.
    Inventors: Yukihiro Urushidani, Kazuhiro Kurosaki, Shinji Tai, Masakazu Nakaya
  • Patent number: 9186873
    Abstract: 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: Grant
    Filed: November 30, 2010
    Date of Patent: November 17, 2015
    Assignee: KURARAY CO., LTD.
    Inventors: Shinji Tai, Hiroshi Kawai, Satoshi Yamakoshi, Kouta Isoyama, Masao Hikasa, Kentaro Yoshida
  • Patent number: 8759447
    Abstract: A compatibilizer contains a polymer (A) obtained by reacting a modified olefin-based polymer (a-1) with a polymer (a-2) containing a terminal functional group, wherein the modified olefin-based polymer (a-1) is a polymer modified with from 0.01 to 2 mass % of unsaturated carboxylic acid or a derivative thereof, and the polymer (a-2) is a ring opening polymer or condensation polymer containing a terminal functional group, capable of reacting with the modified olefin-based polymer (a-1), at both ends or one end thereof and has a number average molecular weight from 1,500 to 100,000. This provides an excellent compatibilizer. Particularly, upon melt processing a recovery of a multilayer structure including an EVOH layer and a thermoplastic resin layer, a recycling agent is provided that gives sufficient improvement effects to any of the adhesion of a degraded resin to a screw of a molding machine, the generation of die build-up, the generation of fish eyes, and the decrease in transparency.
    Type: Grant
    Filed: September 30, 2010
    Date of Patent: June 24, 2014
    Assignee: Kuraray Co., Ltd.
    Inventors: Takeyuki Igarashi, Shinji Tai, Tomoyuki Watanabe
  • Publication number: 20130264743
    Abstract: The invention provides novel processes for producing in-mold labeled containers and the containers produced using such processes. The processes involve setting a multilayered label having an oxygen barrier layer into a mold and injecting a melted resin suitable for forming a container into the mold. The process forms a container with an oxygen barrier layer. In preferred embodiments, the multilayered label has at least an oxygen absorbing resin layer containing ethylene-vinyl alcohol copolymer and an oxygen absorbent and the container is retortable.
    Type: Application
    Filed: July 5, 2011
    Publication date: October 10, 2013
    Applicants: KURARAY CO., LTD., NESTEC S.A.
    Inventors: Yukihiro Urushidani, Kazuhiro Kurosaki, Shinji Tai, Masakazu Nakaya
  • Publication number: 20130244048
    Abstract: A resin composition, containing: (A) polyolefin; (B) a saponified ethylene-vinyl acetate copolymer having an ethylene content of from 20 to 65 mol % and a degree of saponification of vinyl acetate units of 96% or more; (C) a saponified ethylene-vinyl acetate copolymer having an ethylene content of from 68 to 98 mol % and a degree of saponification of vinyl acetate units of 20% or more; and a pigment (E), wherein a mass ratio (A/B) is from 3 to 99.5, a mass ratio (B/C) is from 1 to 100, a mass ratio (E/C) is from 0.04 to 50, and a content of (C) is from 0.01 to 2.4 parts by mass based on 100 parts by mass of (A) and (B). A molded product, in particular a multilayered structure, obtained by melt molding the resin composition has good dispersibility of the pigment, and improved uneven coloration.
    Type: Application
    Filed: March 25, 2011
    Publication date: September 19, 2013
    Applicant: KURARAY CO., LTD.
    Inventors: Takeyuki Igarashi, Yasuhiko Haneda, Masahiro Kitamura, Shinji Tai
  • Publication number: 20130225756
    Abstract: Provided is a resin mixture, comprising: polyolefin (A); a saponified ethylene-vinyl acetate copolymer (B); and an acid modified olefin-vinyl carboxylate copolymer (C), wherein the acid modified olefin-vinyl carboxylate copolymer (C) has an olefin content of from 50 to 95 mol %, and a difference between an ethylene content of the saponified ethylene-vinyl acetate copolymer (B) and the olefin content of the acid modified olefin-vinyl carboxylate copolymer (C) is within a range of from 20 to 70 mol %. This enables to provide a resin mixture that contains polyolefin and an EVOH, and even in continuous melt molding over a long period of time, has a less amount of screw buildup of a degraded material and also is reduced in generation of fish-eyes, cords, and streaks in a molded product obtained therefrom.
    Type: Application
    Filed: November 1, 2011
    Publication date: August 29, 2013
    Applicant: KURARAY CO., LTD.
    Inventors: Takeyuki Igarashi, Shinji Tai
  • Publication number: 20130186539
    Abstract: A multilayered structure having a layer A constituted with a resin composition containing a gas barrier resin, and a layer B being adjacent to the layer A and being constituted with a resin composition containing an elastomer. The total number of the layer A and the layer B is at least 7. The average thickness of the layer A in terms of a single layer is no less than 0.001 ?m and no greater than 10 ?m, and the average thickness of the layer B in terms of a single layer is no less than 0.001 ?m and no greater than 40 ?m. The multilayered structure is formed by irradiating with an active energy ray. Furthermore, an inner liner having the multilayered structure, and a pneumatic tire provided with the inner liner are provided.
    Type: Application
    Filed: November 30, 2010
    Publication date: July 25, 2013
    Applicants: BRIDGESTONE CORPORATION, KURARAY CO., LTD.
    Inventors: Yuwa Takahashi, Shinji Tai, Masao Hikasa, Hideki Kitano, Tetsuo Amamoto, Takatsugu Tanaka
  • Publication number: 20130040157
    Abstract: A resin composition, containing: (A) polyolefin; (B) a saponified ethylene-vinyl acetate copolymer having an ethylene content of from 20 to 65 mol % and a degree of saponification of vinyl acetate units of 96% or more; (C) a saponified ethylene-vinyl acetate copolymer having an ethylene content of from 68 to 98 mol % and a degree of saponification of vinyl acetate units of 20% or more; and a pigment (E), wherein a mass ratio (A/B) is from 3 to 99.5, a mass ratio (B/C) is from 1 to 100, a mass ratio (E/C) is from 0.04 to 50, and a content of (C) is from 0.01 to 2.4 parts by mass based on 100 parts by mass of (A) and (B). A molded product, in particular a multilayered structure, obtained by melt molding the resin composition has good dispersibility of the pigment, and improved uneven coloration.
    Type: Application
    Filed: March 25, 2011
    Publication date: February 14, 2013
    Applicant: KURARAY CO., LTD.
    Inventors: Takeyuki Igarashi, Yasuhiko Haneda, Masahiro Kitamura, Shinji Tai
  • Publication number: 20130017383
    Abstract: 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: Application
    Filed: March 30, 2011
    Publication date: January 17, 2013
    Inventors: Shinji Tai, Hiroshi Kawai, Satoshi Yamakoshi, Kouta Isoyama, Masao Hikasa
  • Patent number: 8329818
    Abstract: 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: Grant
    Filed: May 10, 2010
    Date of Patent: December 11, 2012
    Assignee: Kuraray Co., Ltd.
    Inventors: Kaoru Ikeda, Shinji Tai, Kouta Isoyama, Tomoyuki Watanabe
  • Publication number: 20120237742
    Abstract: 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: Application
    Filed: November 30, 2010
    Publication date: September 20, 2012
    Applicants: BRIDGESTONE CORPORATION, KURARAY CO., LTD.
    Inventors: Shinji Tai, Hiroshi Kawai, Satoshi Yamakoshi, Kouta Isoyama, Masao Hikasa, Yuwa Takahashi, Hideki Kitano, Tetsuo Amamoto, Takatsugu Tanaka
  • Publication number: 20120237747
    Abstract: 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: Application
    Filed: November 30, 2010
    Publication date: September 20, 2012
    Applicant: KURARAY CO., LTD.
    Inventors: Shinji Tai, Hiroshi Kawai, Satoshi Yamakoshi, Kouta Isoyama, Masao Hikasa, Kentaro Yoshida
  • Publication number: 20120196970
    Abstract: A compatibilizer contains a polymer (A) obtained by reacting a modified olefin-based polymer (a-1) with a polymer (a-2) containing a terminal functional group, wherein the modified olefin-based polymer (a-1) is a polymer modified with from 0.01 to 2 mass % of unsaturated carboxylic acid or a derivative thereof, and the polymer (a-2) is a ring opening polymer or condensation polymer containing a terminal functional group, capable of reacting with the modified olefin-based polymer (a-1), at both ends or one end thereof and has a number average molecular weight from 1,500 to 100,000. This provides an excellent compatibilizer. Particularly, upon melt processing a recovery of a multilayer structure including an EVOH layer and a thermoplastic resin layer, a recycling agent is provided that gives sufficient improvement effects to any of the adhesion of a degraded resin to a screw of a molding machine, the generation of die build-up, the generation of fish eyes, and the decrease in transparency.
    Type: Application
    Filed: September 30, 2010
    Publication date: August 2, 2012
    Applicant: KURARAY CO., LTD.
    Inventors: Takeyuki Igarashi, Shinji Tai, Tomoyuki Watanabe