Patents by Inventor Shuyou Akama
Shuyou Akama 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: 10308755Abstract: The present invention provides a sheet-forming body containing a thiourethane bond-having compound and a thiol group-having compound, wherein, in an IR absorption spectrum thereof, the ratio of the peak intensity A of the absorption peak based on the carbonyl group in the thiourethane bond to the peak intensity B of the absorption peak based on the thiol group (A/B) is 20 or more and 250 or less. Using the sheet-forming body, rubber members, especially vulcanized rubber members can be strongly bonded, and the sheet-forming body and an adhesive sheet, which are excellent in handleability and workability, and a laminate produced by bonding rubber layers using the sheet-forming body are provided.Type: GrantFiled: March 31, 2015Date of Patent: June 4, 2019Assignee: BRIDGESTONE CORPORATIONInventors: Takenobu Ishihara, Shuyou Akama, Atsushi Hara
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Publication number: 20180171117Abstract: Provided is a rubber composition having excellent adhesiveness with reinforcing members, particularly reinforcing members in environmental degradation. The rubber composition is obtainable by compounding a rubber component containing a diene based rubber, a chlorinated paraffin and a carbon black, wherein: a compounding amount of the chlorinated paraffin is 3 parts by mass or more per 100 parts by mass of the diene based rubber.Type: ApplicationFiled: June 14, 2016Publication date: June 21, 2018Applicant: BRIDGESTONE CORPORATIONInventors: Genho TAKANO, Shuyou AKAMA
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Publication number: 20180171119Abstract: Provided is a rubber composition having excellent adhesiveness with reinforcing members, particularly reinforcing members in environmental degradation. The rubber composition is obtainable by compounding a rubber component containing a diene based rubber, a rosin based resin and a carbon black, wherein: a compounding amount of the rosin based resin is 3 parts by mass or more per 100 parts by mass of the diene based rubber.Type: ApplicationFiled: June 21, 2016Publication date: June 21, 2018Applicant: BRIDGESTONE CORPORATIONInventors: Genho TAKANO, Shuyou AKAMA
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Publication number: 20180134494Abstract: Provided is a rubber composition having excellent adhesiveness with reinforcing members, particularly reinforcing members in environmental degradation. The rubber composition is obtainable by compounding a rubber component containing a diene based rubber, a phenol based resin and a carbon black, wherein: a compounding amount of the phenol based resin is 3 parts by mass or more per 100 parts by mass of the diene based rubber.Type: ApplicationFiled: June 21, 2016Publication date: May 17, 2018Applicant: BRIDGESTONE CORPORATIONInventors: Genho TAKANO, Shuyou AKAMA
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Publication number: 20170037179Abstract: The present invention provides a sheet-forming body containing a thiourethane bond-having compound and a thiol group-having compound, wherein, in an IR absorption spectrum thereof, the ratio of the peak intensity A of the absorption peak based on the carbonyl group in the thiourethane bond to the peak intensity B of the absorption peak based on the thiol group (A/B) is 20 or more and 250 or less. Using the sheet-forming body, rubber members, especially vulcanized rubber members can be strongly bonded, and the sheet-forming body and an adhesive sheet, which are excellent in handleability and workability, and a laminate produced by bonding rubber layers using the sheet-forming body are provided.Type: ApplicationFiled: March 31, 2015Publication date: February 9, 2017Applicant: BRIDGESTONE CORPORATIONInventors: Takenobu ISHIHARA, Shuyou AKAMA, Atsushi HARA
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Publication number: 20150218329Abstract: A member that, while maintaining water repellency and oil repellency, has an improved slidability (water-sliding property that allows for easy removal of water droplets on a surface) is provided. The member according to the present invention having, at least on a surface thereof, a cured layer obtained by curing a curable resin composition includes, in an area within 1 nm in depth from an outermost surface of the cured layer, a fluorine element at 1.0 at % to 10.0 at % and a silicon element at 1.0 at % to 20.0 at %.Type: ApplicationFiled: August 6, 2013Publication date: August 6, 2015Applicant: BRIDGESTONE CORPORATIONInventors: Takenobu Ishihara, Shuyou Akama
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Patent number: 8865841Abstract: The invention provides a rubber composition comprising a styrene-butadiene copolymer and having improved compatibility with a thiol-based crosslinking agent and also having increased curability. As means for solving the problems, the inventive thiol-containing liquid rubber composition comprises (A) a styrene-butadiene copolymer which is liquid at 25° C. and (B) a polythiol derived from mercaptocarboxylic acid, wherein the styrene-butadiene copolymer (A) desirably has a bound styrene content of 20 to 90% by mass.Type: GrantFiled: April 16, 2010Date of Patent: October 21, 2014Assignee: Bridgestone CorporationInventors: Hajime Kitano, Shuyou Akama
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Patent number: 8663748Abstract: In the formation of a conductive roller 1, a compound forming an elastomer by curing through an electron beam irradiation or a ultraviolet ray irradiation is applied onto an outside of a shaft member 2 to form an elastomeric coating layer 3R and then the elastomeric coating layer is cured through an irradiation of an electron beam or a ultraviolet ray to form an elastic layer, whereby the elastic layer can be formed cheaply without sacrificing precision of peripheral dimension to largely reduce the cost of the conductive roller.Type: GrantFiled: September 21, 2005Date of Patent: March 4, 2014Assignee: Bridgestone CorporationInventors: Shuyou Akama, Hiroyuki Anzai, Hiroyuki Kanesugi, Koji Takagi
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Patent number: 8541510Abstract: This invention relates to a thermosetting composition having an excellent thermosetting property, and more particularly to a thermosetting composition comprising (A) a diene-based polymer having two or more unsaturated bonds, (B) a polythiol derived from a mercaptocarboxylic acid, and (c) a thermally radical-generating agent.Type: GrantFiled: September 25, 2009Date of Patent: September 24, 2013Assignee: Bridgestone CorporationInventors: Hajime Kitano, Shuyou Akama
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Patent number: 8476333Abstract: The present invention relates to a photocurable composition which exhibits excellent adhesiveness not only to thermoplastic resins such as PET and polyimide but also to adherends of metal oxides such as IZO and metals such as gold, more particularly to a photocurable composition which comprises a urethane oligomer (A) having two or more allyl ether and/or vinyl ether groups and a polythiol (B) having two or more thiol groups.Type: GrantFiled: August 9, 2010Date of Patent: July 2, 2013Assignee: Bridgestone CorporationInventors: Hajime Kitano, Shuyou Akama
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Patent number: 8376922Abstract: A conductive roller such as a developing roller, a charging roller or the like provided with a resin coating layer on a surface of an elastic layer, and more particularly to a conductive roller having the resin coating layer using an ultraviolet-curing type resin or an electron beam curing type resin and being obtained by contriving a structure of the resin coating layer, rendering the resin coating layer to contain microparticles, controlling the particle size of the microparticles, or forming the resin coating layer after the outer peripheral surface of the elastic layer is subjected to surface treatment.Type: GrantFiled: June 8, 2005Date of Patent: February 19, 2013Assignee: Bridgestone CorporationInventors: Shuyou Akama, Hiroyuki Anzai, Hiroyuki Kanesugi, Hikaru Ishikawa, Junji Sakata, Koji Takagi, Takayuki Sugimura
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Patent number: 8292791Abstract: An electrical conductive roller 1 that includes a shaft member 2 born at both end portions in a lengthwise direction thereof, and one or more elastic layers 3 arranged on a radially outside thereof, where each elastic layer has a glass transition point of not higher than ?40° C., and at least one of the elastic layers is constituted with a ultraviolet curing type resin containing an electrically conducting agent and a ultraviolet initiator.Type: GrantFiled: March 28, 2006Date of Patent: October 23, 2012Assignee: Bridgestone CorporationInventors: Shuyou Akama, Hiroyuki Anzai, Koji Takagi
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Publication number: 20120165498Abstract: The present invention relates to a photocurable composition which exhibits excellent adhesiveness not only to thermoplastic resins such as PET and polyimide but also to adherends of metal oxides such as IZO and metals such as gold, more particularly to a photocurable composition which comprises a urethane oligomer (A) having two or more allyl ether and/or vinyl ether groups and a polythiol (B) having two or more thiol groups.Type: ApplicationFiled: August 9, 2010Publication date: June 28, 2012Applicant: BRIDGESTONE CORPORATIONInventors: Hajime Kitano, Shuyou Akama
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Publication number: 20120071579Abstract: The invention provides a light-curable adhesive resin composition, which exhibits good adhesion to adherends, including not only thermoplastic resins such as PET or polyimide, but also metal oxides such as IZO and metals such as gold. As means for solving the problems, the inventive thiol group-containing adhesive resin composition contains (A) a urethane (meta-) acrylate oligomer having a weight average molecular weight (Mw) of 5,000-40,000, (B) a (meta-) acryloyl morpholine monomer, (C) a polythiol, and (D) a photopolymerization initiator, wherein the polythiol (C) has thiol groups in an amount of 0.4 equivalents or more per 1 equivalent of the total (meta-) acrylate groups contained in the thiol group-containing adhesive resin composition.Type: ApplicationFiled: April 19, 2010Publication date: March 22, 2012Applicant: BRIDGESTONE CORPORATIONInventors: Hajime Kitano, Shuyou Akama
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Publication number: 20120041154Abstract: The invention provides a rubber composition comprising a styrene-butadiene copolymer and having improved compatibility with a thiol-based crosslinking agent and also having increased curability. As means for solving the problems, the inventive thiol-containing liquid rubber composition comprises (A) a styrene-butadiene copolymer which is liquid at 25° C. and (B) a polythiol derived from mercaptocarboxylic acid, wherein the styrene-butadiene copolymer (A) desirably has a bound styrene content of 20 to 90% by mass.Type: ApplicationFiled: April 16, 2010Publication date: February 16, 2012Applicant: BRIDGESTONE CORPORATIONInventors: Hajime Kitano, Shuyou Akama
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Publication number: 20110224382Abstract: This invention relates to a thermosetting composition having an excellent thermosetting property, and more particularly to a thermosetting composition comprising (A) a diene-based polymer having two or more unsaturated bonds, (B) a polythiol derived from a mercaptocarboxylic acid, and (c) a thermally radical-generating agent.Type: ApplicationFiled: September 25, 2009Publication date: September 15, 2011Applicant: BRIDGESTONE CORPORATIONInventors: Hajime Kitano, Shuyou Akama
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Patent number: 7912411Abstract: A developing roller includes an ultraviolet-curing type resin layer and using a carbon-based electrically conducting agent for giving an electrical conductivity to the resin layer, as well as an imaging apparatus using the same. The developing roller 1 includes a shaft member 2 including a hollow cylindrical body or a solid cylindrical body of a resin containing an electrically conducting agent and a resin layer 4. The resin layer 4 is made of a resin having fine particles dispersed therein, wherein a ratio a/b of average particle size of fine particles a to a total thickness of resin layers b is greater than 2.0 and less than or equal to 5.0.Type: GrantFiled: June 8, 2005Date of Patent: March 22, 2011Assignee: Bridgestone CorporationInventors: Koji Takagi, Shuyou Akama, Takuya Morooka
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Patent number: 7907878Abstract: A developing roller includes an ultraviolet-curing type resin layer and using a carbon-based electrically conducting agent for giving an electrical conductivity to the resin layer, as well as an imaging apparatus using the same. The developing roller 1 includes a shaft member 2 of a metal pipe and a resin layer 4. The resin layer 4 is a resin having fine particles dispersed therein, wherein the ratio a/b of average particle size of fine particles a to total thickness of resin layers b is greater than 2.0 and less than or equal to 5.0.Type: GrantFiled: June 8, 2005Date of Patent: March 15, 2011Assignee: Bridgestone CorporationInventors: Koji Takagi, Shuyou Akama
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Publication number: 20090010690Abstract: This invention relates to a conductive roller having high adhesion property between an elastic layer and a coating layer, and more particularly to a conductive roller 1 comprising a shaft member 2, one or more elastic layers 3 disposed on an outside of the shaft member 2 in a radial direction and one or more coating layers 4 disposed on an outside of the elastic layer 3 in a radial direction, characterized in that at least an outermost layer of the elastic layers 3 and an innermost layer of the coating layers 4 are composed of an ultraviolet-curing type resin formed by curing an ultraviolet curable raw material mixture through ultraviolet irradiation, and (1) the raw material mixture used in the innermost layer of the coating layers 4 comprises a monomer having a heterocycle, or (2) the raw material mixture used in the innermost layer of the coating layers 4 and the raw material mixture used in the outermost layer of the elastic layers 3 comprise at least one polar group-containing monomer selected from the gType: ApplicationFiled: March 7, 2007Publication date: January 8, 2009Applicant: BRIDGESTONE CORPORATIONInventors: Hiroyuki Kanesugi, Junji Sakata, Shuyou Akama
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Publication number: 20080318748Abstract: [Task] It is provide an electrical conductive roller capable of forming an elastic layer cheaply to largely reduce a product cost without sacrificing a dimensional precision of an outer periphery. [Solution Means] An electrical conductive roller 1 comprises a shaft member 2 born at both end portions in a lengthwise direction thereof, and one or more elastic layers 3 arranged on a radially outside thereof, wherein each elastic layer has a glass transition point of not higher than ?40° C., and at least one of the elastic layers is constituted with a ultraviolet curing type resin containing an electrically conducting agent and a ultraviolet initiator.Type: ApplicationFiled: March 28, 2006Publication date: December 25, 2008Applicant: BRIDGESTONE CORPORATIONInventors: Shuyou Akama, Hiroyuki Anzai, Koji Takagi