Patents by Inventor Shusaku Tomoi

Shusaku Tomoi 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).

  • Publication number: 20220274442
    Abstract: Provided is an inner liner which adheres to the carcass or other rubber composition layer of a tire, even during low-temperature vulcanization on the order of 160° C., without using an adhesive or an adhesive tie gum. The invention provides a pneumatic tire inner liner comprising a thermoplastic elastomer composition, characterized in that the thermoplastic elastomer composition includes a thermoplastic resin (a11) having a melting point of 180° C. or lower, or a thermoplastic elastomer (a12) having a melting point of 180° C. or lower and including no residue containing an unsaturated bond derived from a conjugated diene compound, and an elastomer (a2) including a residue containing an unsaturated bond derived from a conjugated diene compound, and the tensile elongation at break of the thermoplastic elastomer composition at 25° C. temperature and 500 mm/min pull speed is 100% or greater.
    Type: Application
    Filed: August 24, 2020
    Publication date: September 1, 2022
    Inventors: Shun SATO, Shusaku TOMOI
  • Patent number: 11364698
    Abstract: In a pneumatic tire production method including a step of overlapping end portions of a sheet laminate and vulcanization-molding the tire, the sheet laminate being obtained by layering an elastomer layer and a sheet of a thermoplastic resin composition containing a thermoplastic resin or a blend of a thermoplastic resin and an elastomer, after the end portions of the sheet laminate are overlapped, the overlapped portion of the sheet laminate is compression-bonded at a temperature of not less than a glass transition temperature Tg of the thermoplastic resin and not greater than 120° C.
    Type: Grant
    Filed: April 3, 2015
    Date of Patent: June 21, 2022
    Assignee: The Yokohama Rubber Co., LTD.
    Inventors: Hideki Seto, Shusaku Tomoi, Hirokazu Shibata
  • Publication number: 20220073740
    Abstract: Provided is a thermoplastic resin composition for refrigerant transporting piping having high barrier properties, flexibility, and good extrusion processability. The thermoplastic resin composition for refrigerant transporting piping is composed of: a matrix containing a thermoplastic resin; and a domain containing a rubber dispersed in the matrix, and is characterized in that the thermoplastic resin has a melting point of 150° C. or higher, the rubber is a butyl-based rubber or an olefin-based rubber, the matrix contains a viscosity stabilizer, the thermoplastic resin composition contains a processing aid and at least one selected from the group consisting of a phenylenediamine-based anti-aging agent, a quinoline-based anti-aging agent, and a trihydric alcohol having a triazine skeleton, and at least a portion of the rubber is crosslinked.
    Type: Application
    Filed: December 17, 2019
    Publication date: March 10, 2022
    Inventor: Shusaku TOMOI
  • Publication number: 20210347973
    Abstract: Provided is a tire inner liner with which it is possible to suppress resistance to flex fatigue during tire travel and peeling failures at high temperatures, and also reduce rolling resistance at low temperatures. A tire inner liner comprising a material that contains a thermoplastic elastomer composition, which is constituted from a thermoplastic resin or thermoplastic-resin component and an elastomer component, said tire inner liner characterized in that, in a temperature dependent curve of tan ? of the material, the maximum value of tan ? occurs between 20° C. and 70° C. inclusive.
    Type: Application
    Filed: September 20, 2019
    Publication date: November 11, 2021
    Inventors: Shun SATO, Shusaku TOMOI, Yuuta KOBAYASHI
  • Publication number: 20210347972
    Abstract: Provided is a tire inner liner capable of reducing rolling resistance during tire driving. The present invention provides a tire inner liner that consists of a material containing a thermoplastic elastomer composition consisting of a thermoplastic resin or a thermoplastic-resin component and an elastomer component, the tire inner liner being characterized in that the ratio of the dynamic storage modulus of the material at 60° C. with respect to the dynamic storage modulus of the material at 0° C. is 0.01-0.3.
    Type: Application
    Filed: September 20, 2019
    Publication date: November 11, 2021
    Inventors: Shun SATO, Shusaku TOMOI, Yuuta KOBAYASHI
  • Publication number: 20210179835
    Abstract: Provided is a thermoplastic elastomer composition which does not undergo viscosity increase during melt molding, gelation and molding failure, while having excellent heat resistance and durability. A thermoplastic elastomer composition for tires, which contains (A) an ethylene-vinyl alcohol copolymer or a modified ethylene-vinyl alcohol copolymer, (B) a thermoplastic resin or a thermoplastic elastomer, which has a melting point of 200° C. or higher, and (C) an acid-modified elastomer in an amount of 20% by volume or more based on the amount of all polymer components. This thermoplastic elastomer composition for tires is characterized in that if this thermoplastic elastomer composition for tires is extruded at a piston speed of 5 min/min at a temperature that is higher than the melting point of the thermoplastic resin or thermoplastic elastomer (B) by 20° C.
    Type: Application
    Filed: September 25, 2018
    Publication date: June 17, 2021
    Inventors: Shun SATO, Shusaku TOMOI
  • Publication number: 20200122518
    Abstract: Provided is a pneumatic tire with a surface provided with a reflective layer that reflects light, the reflective layer including a transparent globule group composed of transparent globules. At least some of the transparent globules are each configured to reflect incident light incident into the transparent globule from outside, at an interface with the outside of the transparent globule, and to emit the light to the outside of the transparent globule as reflected light. The transparent globules are each configured to cause the reflected light to include more amount of non-retroreflected light than retroreflected light, the non-retroreflected light moving further away from an optical path of the incident light according to a distance from the transparent globules, being increased. The transparent globules each have an optical path of the non-retroreflected light with an angle difference of from 2.0 degrees to 2.5 degrees from the optical path of the incident light.
    Type: Application
    Filed: June 5, 2018
    Publication date: April 23, 2020
    Inventors: Atsushi Tanno, Shusaku Tomoi
  • Patent number: 10427457
    Abstract: A tire comprising an outer tread layer, intermediate sidewall and carcass layers and an innermost air permeation prevention layer: (i) the air permeation prevention (APP) layer having an upper and a lower surface, the layer having a polymer composition exhibiting an air permeation coefficient (APC) of about 25×10?12 cc cm/cm2 sec cmHg (at 30° C.) or less and a Young's modulus of about 1 MPa to about 500 MPa, the polymer composition comprising: (A) at least 10 wt % of at least one thermoplastic resin component having an APC of about 25×10?12 cc cm/cm2 sec cmHg (at 30° C.) or less and a Young's modulus of more than 500 MPa, which is preferably a polyamide resin or mixture, and (B) at least 10 wt % of at least one elastomer component having an APC of more than about 25×10?12 cc cm/cm2 sec cmHg (at 30° C.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: October 1, 2019
    Assignees: EXXONMOBIL CHEMICAL PATENTS INC., THE YOKOHAMA RUBBER CO., LTD.
    Inventors: Andy Haishung Tsou, Stephan Bertil Ohlsson, Yoshihiro Soeda, Shusaku Tomoi, Yuichi Hara
  • Publication number: 20190270232
    Abstract: A method of manufacturing a film for tire used in an air penetration preventing layer of a pneumatic tire, composed of a thermoplastic elastomer with an elastomer component dispersed within a thermoplastic resin includes performing heat treatment on the film for tire formed by inflation molding or cast molding in a state of being wound in a roll together with a liner material configured to regulate deformation of the film for tire, the heat treatment being at a heat treating temperature equal to or higher than a glass transition temperature of a resin with a highest glass transition temperature in the thermoplastic resin included in the film for tire.
    Type: Application
    Filed: September 20, 2017
    Publication date: September 5, 2019
    Applicant: The Yokohama Rubber Co., LTD.
    Inventors: Shusaku Tomoi, Shun Sato, Tsuyoshi Nomaguchi, Masaya Mita, Ken Tanaka, Makoto Imagawa, Kenji Takada, Hiroshi Yamada
  • Patent number: 9969217
    Abstract: A laminate comprising at least one layer of a first thermoplastic resin composition alternately stacked with at least two layers of a second thermoplastic resin composition so that the outermost layers are the layers of the second thermoplastic resin composition, wherein the first thermoplastic resin composition comprises at least one selected from the group consisting of ethylene-vinyl alcohol copolymer and modified ethylene-vinyl alcohol copolymers, and the second thermoplastic resin composition has a different composition from the first thermoplastic resin composition, and wherein, in any adjacent pair of the layer of the first thermoplastic resin composition and the layer of the second thermoplastic resin composition, the layer of the first thermoplastic resin composition and the layer of the second thermoplastic resin composition have a specific tensile modulus ratio and a specific thickness ratio.
    Type: Grant
    Filed: January 19, 2016
    Date of Patent: May 15, 2018
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Shusaku Tomoi, Yuichi Hara
  • Publication number: 20180117966
    Abstract: A tire comprising an outer tread layer, intermediate sidewall and carcass layers and an innermost air permeation prevention layer: (i) the air permeation prevention (APP) layer having an upper and a lower surface, the layer having a polymer composition exhibiting an air permeation coefficient (APC) of about 25×10?12 cc cm/cm2 sec cmHg (at 30° C.) or less and a Young's modulus of about 1 MPa to about 500 MPa, the polymer composition comprising: (A) at least 10 wt % of at least one thermoplastic resin component having an APC of about 25×10?12 cc cm/cm2 sec cmHg (at 30° C.) or less and a Young's modulus of more than 500 MPa, which is preferably a polyamide resin or mixture, and (B) at least 10 wt % of at least one elastomer component having an APC of more than about 25×10?12 cc cm/cm2 sec cmHg (at 30° C.
    Type: Application
    Filed: December 28, 2017
    Publication date: May 3, 2018
    Inventors: Andy Haishung Tsou, Stephan Bertil Ohlsson, Yoshihiro Soeda, Shusaku Tomoi, Yuichi Hara
  • Patent number: 9919561
    Abstract: Provided is an adhesive composition that provides excellent adhesion between a thermoplastic resin or a thermoplastic elastomer in which an elastomer component is dispersed in the thermoplastic resin and a tire by a combination of general-purpose materials, without using any special polymer. The adhesive composition comprises 100 parts by weight of a base polymer and 20 to 50 parts by weight of a resol-type phenolic resin-based resin crosslinking agent, wherein 100 parts by weight of the base polymer comprises 80 to 99 parts by weight of a thermoplastic elastomer and 1 to 20 parts by weight of a halogenated rubber. The resol-type phenolic resin-based resin crosslinking agent is preferably an alkylphenol-formaldehyde resin. Examples of the thermoplastic elastomer can include styrene-butadiene-styrene block copolymers, and examples of the halogenated rubber can include chloroprene rubber and chlorosulfonated polyethylene.
    Type: Grant
    Filed: July 2, 2014
    Date of Patent: March 20, 2018
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventor: Shusaku Tomoi
  • Publication number: 20170190129
    Abstract: In a pneumatic tire production method including a step of overlapping end portions of a sheet laminate and vulcanization-molding the tire, the sheet laminate being obtained by layering an elastomer layer and a sheet of a thermoplastic resin composition containing a thermoplastic resin or a blend of a thermoplastic resin and an elastomer, after the end portions of the sheet laminate are overlapped, the overlapped portion of the sheet laminate is compression-bonded at a temperature of not less than a glass transition temperature Tg of the thermoplastic resin and not greater than 120° C.
    Type: Application
    Filed: April 3, 2015
    Publication date: July 6, 2017
    Inventors: Hideki Seto, Shusaku Tomoi, Hirokazu Shibata
  • Patent number: 9643452
    Abstract: Provided is an adhesive composition that provides excellent adhesion between a thermoplastic resin or a thermoplastic elastomer in which an elastomer component is dispersed in the thermoplastic resin and a tire by a combination of general-purpose materials, without using any special polymer. The adhesive composition comprises 100 parts by weight of a base polymer and 20 to 50 parts by weight of a resol-type phenolic resin-based resin crosslinking agent, wherein 100 parts by weight of the base polymer comprises 80 to 99 parts by weight of a thermoplastic elastomer and 1 to 20 parts by weight of a halogenated rubber. The resol-type phenolic resin-based resin crosslinking agent is preferably an alkylphenol-formaldehyde resin. Examples of the thermoplastic elastomer can include styrene-butadiene-styrene block copolymers, and examples of the halogenated rubber can include chloroprene rubber and chlorosulfonated polyethylene.
    Type: Grant
    Filed: March 7, 2011
    Date of Patent: May 9, 2017
    Assignee: THE YOKOHAMA RUBBER CO., LTD.
    Inventor: Shusaku Tomoi
  • Patent number: 9540510
    Abstract: A stabilized, dynamically vulcanized thermoplastic elastomer composition comprising dispersed dynamically vulcanized particles of at least one first elastomer or rubber comprising halogenated isobutylene-containing elastomer and dispersed particles of at least one second elastomer or rubber comprising at least one functional group capable of reacting with and grafting to a polyamide, the particles of the at least one first and at least one second elastomers dispersed in a continuous thermoplastic polyamide or nylon resin matrix comprising at least one nylon homopolymer, nylon copolymer or mixture thereof, the composition or the at least one first elastomer further comprising at least one stabilizer against degradation induced by exposure to actinic, particularly ultraviolet, radiation.
    Type: Grant
    Filed: December 17, 2008
    Date of Patent: January 10, 2017
    Assignees: The Yokohama Rubber Co., Ltd, ExxonMobil Chemical Patents Inc.
    Inventors: Edward John Blok, Bruce Alan Harrington, Yuichi Hara, Shusaku Tomoi
  • Publication number: 20160263868
    Abstract: A laminate of a film and a rubber composition, the film being formed from a thermoplastic elastomer composition in which rubber particles are dispersed in a thermoplastic resin, wherein the Sdr value of the film in contact with the rubber composition is 0.042 or more.
    Type: Application
    Filed: November 12, 2014
    Publication date: September 15, 2016
    Inventors: Shusaku TOMOI, Hirokazu SHIBATA, Shun SATO, Yuichi HARA
  • Publication number: 20160136999
    Abstract: A laminate comprising at least one layer of a first thermoplastic resin composition alternately stacked with at least two layers of a second thermoplastic resin composition so that the outermost layers are the layers of the second thermoplastic resin composition, wherein the first thermoplastic resin composition comprises at least one selected from the group consisting of ethylene-vinyl alcohol copolymer and modified ethylene-vinyl alcohol copolymers, and the second thermoplastic resin composition has a different composition from the first thermoplastic resin composition, and wherein, in any adjacent pair of the layer of the first thermoplastic resin composition and the layer of the second thermoplastic resin composition, the layer of the first thermoplastic resin composition and the layer of the second thermoplastic resin composition have a specific tensile modulus ratio and a specific thickness ratio.
    Type: Application
    Filed: January 19, 2016
    Publication date: May 19, 2016
    Inventors: Shusaku Tomoi, Yuichi Hara
  • Patent number: 9272491
    Abstract: A laminate comprising at least one layer of a first thermoplastic resin composition alternately stacked with at least two layers of a second thermoplastic resin composition, so that the outermost layers are the layers of the second thermoplastic resin composition, wherein the first thermoplastic resin composition, comprises at least one selected from the group consisting of ethylene-vinyl alcohol copolymer and modified ethylene-vinyl alcohol copolymers, and the second thermoplastic resin composition has a different composition from the first thermoplastic resin composition, and wherein, in any adjacent pair of the layer of the first thermoplastic resin composition and the layer of the second thermoplastic resin composition, the layer of the first thermoplastic resin composition and the layer of the second thermoplastic resin composition have a specific tensile modulus ratio and a specific thickness ratio.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: March 1, 2016
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Shusaku Tomoi, Yuichi Hara
  • Patent number: 9267025
    Abstract: A method for producing a thermoplastic elastomer composition including a thermoplastic resin composition as a continuous phase and also including a modified elastomer dispersed into the continuous phase as a dispersed phase, wherein the method comprises, in the stated order: (1) a step for reacting a polyamide resin and an epoxy group-containing polymer together to generate an end-capped polyamide resin; (2) a step for adding EVOH and a modified elastomer to the product obtained in step (1); (3) a step for dispersing the EVOH into the product obtained in step (1); (4) a step for adding a cross-linking agent for cross-linking the modified elastomer to the dispersion obtained in step (3); and (5) a step for cross-linking the modified elastomer using the cross-linking agent; and wherein the thermoplastic resin composition comprises EVOH and an end-capped polyamide resin.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: February 23, 2016
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventor: Shusaku Tomoi
  • Publication number: 20150057414
    Abstract: A thermoplastic elastomer composition which comprises (A) a thermoplastic resin, (B) a halogenated isoolefin/para-alkylstyrene copolymer rubber, and (C) a thermoplastic elastomer, wherein the thermoplastic resin (A) forms a continuous phase, the halogenated isoolefin/para-alkylstyrene copolymer rubber (B) and the thermoplastic elastomer (C) have been separately dispersed in the continuous phase, the halogenated isoolefin/para-alkylstyrene copolymer (B) has been crosslinked, the thermoplastic elastomer (C) has not been crosslinked, and the amount of the thermoplastic elastomer (C) is 20-50 mass % with respect to the total amount of the halogenated isoolefin/para-alkylstyrene copolymer rubber (B) and the thermoplastic elastomer (C).
    Type: Application
    Filed: November 19, 2012
    Publication date: February 26, 2015
    Inventor: Shusaku Tomoi