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).
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Patent number: 9540510Abstract: 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: GrantFiled: December 17, 2008Date of Patent: January 10, 2017Assignees: The Yokohama Rubber Co., Ltd, ExxonMobil Chemical Patents Inc.Inventors: Edward John Blok, Bruce Alan Harrington, Yuichi Hara, Shusaku Tomoi
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Publication number: 20160263868Abstract: 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: ApplicationFiled: November 12, 2014Publication date: September 15, 2016Inventors: Shusaku TOMOI, Hirokazu SHIBATA, Shun SATO, Yuichi HARA
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Publication number: 20160136999Abstract: 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: ApplicationFiled: January 19, 2016Publication date: May 19, 2016Inventors: Shusaku Tomoi, Yuichi Hara
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Patent number: 9272491Abstract: 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: GrantFiled: March 18, 2011Date of Patent: March 1, 2016Assignee: The Yokohama Rubber Co., Ltd.Inventors: Shusaku Tomoi, Yuichi Hara
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Patent number: 9267025Abstract: 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: GrantFiled: November 19, 2012Date of Patent: February 23, 2016Assignee: The Yokohama Rubber Co., Ltd.Inventor: Shusaku Tomoi
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Publication number: 20150057414Abstract: 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: ApplicationFiled: November 19, 2012Publication date: February 26, 2015Inventor: Shusaku Tomoi
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Patent number: 8960250Abstract: An article having a fluid permeation prevention layer, such as a pneumatic tire or hose. A tire for example includes 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: GrantFiled: October 26, 2006Date of Patent: February 24, 2015Assignees: The Yokohama Rubber Co., Ltd., ExxonMobil Chemical Patents Inc.Inventors: Andy Haishung Tsou, Stephan Bertil Ohlsson, Yoshihiro Soeda, Shusaku Tomoi, Yuichi Hara
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Publication number: 20150045511Abstract: 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: ApplicationFiled: November 19, 2012Publication date: February 12, 2015Applicant: The Yokohama Rubber Co., Ltd.Inventor: Shusaku Tomoi
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Publication number: 20150034227Abstract: An article having a fluid permeation prevention layer, such as a pneumatic tire or hose. A tire for example includes 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: ApplicationFiled: October 17, 2014Publication date: February 5, 2015Inventors: Andy Haishung Tsou, Stephan Bertil Ohlsson, Yoshihiro Soeda, Shusaku Tomoi, Yuichi Hara
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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: 8933172Abstract: A thermoplastic elastomer composition having a continuous phase and a dispersed phase, wherein the continuous phase comprising (A) an epoxy-modified polyamide resin, and the dispersed phase comprising (B) a halogenated isoolefin-paraalkylstyrene copolymer rubber, wherein the thermoplastic elastomer composition is obtained by melt-kneading (B) halogenated isoolefin-paraalkylstyrene copolymer rubber, (C) a polyamide resin, and (D) a polyfunctional epoxy compound having two or more epoxy groups per molecule in an amount of 0.05 parts by weight or more and less than 3 parts by weight with respect to 100 parts by weight of polyamide resin (C), at a temperature which is equal to or more than the melting point of polyamide resin (C), and epoxy-modified polyamide resin (A) is produced by the reaction of polyamide resin (C) with polyfunctional epoxy compound (D) during the melt-kneading.Type: GrantFiled: February 10, 2011Date of Patent: January 13, 2015Assignee: The Yokohama Rubber Co., Ltd.Inventor: Shusaku Tomoi
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Patent number: 8921483Abstract: In order to improve fatigue durability of a thermoplastic elastomer composition composed of a matrix phase of a thermoplastic resin and dispersed phases of a rubber, the thermoplastic elastomer composition comprises (A) 100 parts by weight of a halogenated poly(isoolefin-co-p-alkylstyrene) rubber, (B) 40 to 120 parts by weight of a polyamide resin, and (C) 0.5 to 10 parts by weight of an amine having at least one hydroxyl group. The amine (C) having at least one hydroxyl group is preferably a compound represented by formula (1): where R1 is a C1-30 alkyl; R2 is —(C2H4O)n—H, where n is an integer of 1 to 30; and R3 is —(C2H4O)m—H, where m is an integer of 1 to 30, a C1-30 alkyl, or hydrogen.Type: GrantFiled: April 21, 2011Date of Patent: December 30, 2014Assignees: The Yokohama Rubber Co., Ltd., ExxonMobil Chemical Patents Inc.Inventor: Shusaku Tomoi
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Publication number: 20140311644Abstract: 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: ApplicationFiled: July 2, 2014Publication date: October 23, 2014Inventor: Shusaku Tomoi
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Publication number: 20140041781Abstract: In order to improve fatigue durability of a thermoplastic elastomer composition composed of a matrix phase of a thermoplastic resin and dispersed phases of a rubber, the thermoplastic elastomer composition comprises (A) 100 parts by weight of a halogenated poly(isoolefin-co-p-alkylstyrene) rubber, (B) 40 to 120 parts by weight of a polyamide resin, and (C) 0.5 to 10 parts by weight of an amine having at least one hydroxyl group. The amine (C) having at least one hydroxyl group is preferably a compound represented by formula (1): where R1 is a C1-30 alkyl; R2 is —(C2H4O)n—H, where n is an integer of 1 to 30; and R3 is —(C2H4O)m—H, where m is an integer of 1 to 30, a C1-30 alkyl, or hydrogen.Type: ApplicationFiled: April 21, 2011Publication date: February 13, 2014Applicant: ExxonMobil Chemical Patents Inc.Inventor: Shusaku Tomoi
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Patent number: 8546478Abstract: Disclosed is a method for producing a thermoplastic elastomer composition having a phase structure comprising a continuous phase comprising at least one thermoplastic resin and a disperse phase comprising dynamically crosslinked elastomer particles finely dispersed in the continuous phase, the method being characterized by dispersing in at least one crosslinkable elastomer component furnace carbon black having a BET nitrogen adsorption specific surface area of from 100 to 260 m2/g and a primary particle average particle diameter of from 10 to 25 nm in an amount of 1 to 15 parts by weight with respect to 100 parts by weight of the at least one crosslinkable elastomer component, prior to or during dynamic crosslinking.Type: GrantFiled: March 18, 2011Date of Patent: October 1, 2013Assignee: The Yokohama Rubber Co., Ltd.Inventors: Shusaku Tomoi, Kouichi Kawaguchi
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Publication number: 20130112330Abstract: 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: ApplicationFiled: March 18, 2011Publication date: May 9, 2013Applicant: The Yokohama Rubber Co., Ltd.Inventors: Shusaku Tomoi, Yuichi Hara
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Publication number: 20130056123Abstract: Disclosed is a method for producing a thermoplastic elastomer composition having a phase structure comprising a continuous phase comprising at least one thermoplastic resin and a disperse phase comprising dynamically crosslinked elastomer particles finely dispersed in the continuous phase, the method being characterized by dispersing in at least one crosslinkable elastomer component furnace carbon black having a BET nitrogen adsorption specific surface area of from 100 to 260 m2/g and a primary particle average particle diameter of from 10 to 25 nm in an amount of 1 to 15 parts by weight with respect to 100 parts by weight of the at least one crosslinkable elastomer component, prior to or during dynamic crosslinking.Type: ApplicationFiled: March 18, 2011Publication date: March 7, 2013Applicant: THE YOKOHAMA RUBBER CO., LTD.Inventors: Shusaku Tomoi, Kouichi Kawaguchi
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Publication number: 20130030124Abstract: A thermoplastic elastomer composition having a continuous phase and a dispersed phase, wherein the continuous phase comprising (A) an epoxy-modified polyamide resin, and the dispersed phase comprising (B) a halogenated isoolefin-paraalkylstyrene copolymer rubber, wherein the thermoplastic elastomer composition is obtained by melt-kneading (B) halogenated isoolefin-paraalkylstyrene copolymer rubber, (C) a polyamide resin, and (D) a polyfunctional epoxy compound having two or more epoxy groups per molecule in an amount of 0.05 parts by weight or more and less than 3 parts by weight with respect to 100 parts by weight of polyamide resin (C), at a temperature which is equal to or more than the melting point of polyamide resin (C), and epoxy-modified polyamide resin (A) is produced by the reaction of polyamide resin (C) with polyfunctional epoxy compound (D) during the melt-kneading.Type: ApplicationFiled: February 10, 2011Publication date: January 31, 2013Applicant: THE YOKOHAMA RUBBER CO., LTD.Inventor: Shusaku Tomoi
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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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Patent number: 8302648Abstract: A pneumatic tire comprising an air permeation preventive layer comprising a film of a thermoplastic resin composition containing a polyvinyl alcohol or ethylene vinyl alcohol copolymer, to which a protective film of a rubber composition containing an ethylene propylene rubber (EPM) or ethylene propylene diene rubber (EPDM) is, directly or via an adhesive, placed adjacent thereto, as one layer in at least one side thereof, whereby both a further reduction in the air leakage rate of the pneumatic tire and a good durability can be achieved and furthermore a reduction in the weight of the tire can be achieved.Type: GrantFiled: September 4, 2007Date of Patent: November 6, 2012Assignee: The Yokohama Rubber Co., Ltd.Inventor: Shusaku Tomoi