Patents by Inventor Sadayuki Nakano
Sadayuki Nakano 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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Publication number: 20210371559Abstract: Disclosed is an ethylene-?-olefin-nonconjugated polyene copolymer rubber satisfying the following requirements (A) and (B): (A) A proportion of a cyclohexane insoluble component at 25° C. is from 0.3% to 50% by mass with respect to a mass of the ethylene-?-olefin-nonconjugated polyene copolymer rubber; and (B) A tan ? ratio calculated by the following equation: tan ? ratio=tan ? (100° C., 5 cpm)/tan ? (100° C., 1000 cpm) is from 3.0 to 20. The tan ? (100° C., 5 cpm) and tan ? (100° C., 1000 cpm) are a loss tangent at 100° C. and a frequency of 5 cpm and a loss tangent at 100° C. and a frequency of 1000 cpm, respectively.Type: ApplicationFiled: November 7, 2018Publication date: December 2, 2021Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Yohei FUJII, Sadayuki NAKANO
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Publication number: 20210355255Abstract: Provided is a rubber composition containing an ethylene-?-olefin-nonconjugated polyene copolymer rubber and a phenolic antioxidant, in which a content of an ethylene unit in the ethylene-?-olefin-nonconjugated polyene copolymer rubber is from 71% to 99% by mass with respect to a total amount of the ethylene unit, an ?-olefin unit, and a nonconjugated polyene unit, a proportion of a cyclohexane insoluble component in the ethylene-?-olefin-nonconjugated polyene copolymer rubber at 25° C. is from 0.2% to 50% by mass with respect to a mass of the ethylene-?-olefin-nonconjugated polyene copolymer rubber, and a content of the phenolic antioxidant is from 0.01 to 0.35 part by mass with respect to 100 parts by mass of a content of the ethylene-?-olefin-nonconjugated polyene copolymer rubber.Type: ApplicationFiled: January 30, 2019Publication date: November 18, 2021Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Yohei FUJII, Sadayuki NAKANO
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Patent number: 11028260Abstract: A rubber composition contains: (A) an ethylene-?-olefin-based copolymer rubber including an ethylene unit and an ?-olefin unit having 3 or more carbon atoms; (B) a fire retardant including a phosphorus atom and a nitrogen atom; (C) a thermally expandable graphite; and (D) additive particles that are porous particles or particles having ion exchangeability. A content of the fire retardant is 50 to 250 parts by mass and a content of the additive particles is 15 parts by mass or less with respect to 100 parts by mass of the ethylene-?-olefin-based copolymer rubber.Type: GrantFiled: June 27, 2017Date of Patent: June 8, 2021Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Takashi Sakai, Sadayuki Nakano
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Publication number: 20200164621Abstract: Disclosed is a rubber composition for direct vulcanization bonding, comprising (A) an ethylene-?-olefin-based copolymer rubber comprising an ethylene unit and an ?-olefin unit having 3 or more carbon atoms, (B) a silane coupling agent comprising a sulfur atom, and (C) a vulcanizing agent comprising sulfur. The content of the silane coupling agent is 2.7 to 12 parts by mass per 100 parts by mass of the ethylene-?-olefin-based copolymer rubber. This rubber composition is used for forming a molded rubber directly vulcanization bonded to a metal member.Type: ApplicationFiled: May 15, 2018Publication date: May 28, 2020Inventors: Takashi SAKAI, Sadayuki NAKANO
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Publication number: 20190225785Abstract: A rubber composition contains: (A) an ethylene-?-olefin-based copolymer rubber including an ethylene unit and an ?-olefin unit having 3 or more carbon atoms; (B) a fire retardant including a phosphorus atom and a nitrogen atom; (C) a thermally expandable graphite; and (D) additive particles that are porous particles or particles having ion exchangeability. A content of the fire retardant is 50 to 250 parts by mass and a content of the additive particles is 15 parts by mass or less with respect to 100 parts by mass of the ethylene-?-olefin-based copolymer rubber.Type: ApplicationFiled: June 27, 2017Publication date: July 25, 2019Inventors: Takashi SAKAI, Sadayuki NAKANO
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Publication number: 20180230254Abstract: An ethylene-?-olefin-based copolymer rubber which contains an ethylene unit and an ?-olefin unit having from 3 to 20 carbon atoms, and satisfies the following requirements (a) and (b) is provided. Requirement (a): a content of the ?-olefin unit is 50% by mass or more and 70% by mass or less when a sum of a content of the ethylene unit and the content of the ?-olefin unit is taken as 100% by mass. Requirement (b): a product of monomer reactivity ratios which is a product of a reactivity ratio of ethylene and a reactivity ratio of an ?-olefin is 0.70 or less and the product of monomer reactivity ratios is a value determined from a 13C-NMR spectrum.Type: ApplicationFiled: August 8, 2016Publication date: August 16, 2018Applicant: Sumitomo Chemical Company, LimitedInventors: Kenta WATANABE, Sadayuki NAKANO
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Patent number: 9809704Abstract: The rubber composition contains the following component (A), the following component (B), and the following component (C). The component (A) is an ethylene-?-olefin-nonconjugated polyene copolymer rubber containing an ethylene unit, an ?-olefin unit, and a nonconjugated polyene unit, a number of carbon atoms of the ?-olefin unit is 3 to 20, a limiting viscosity measured in 135° C. tetralin is 2.8 dl/g to 5 dl/g, a content of the ethylene unit is 70 mol % to 90 mol % (where a total of the content of the ethylene unit and a content of the ?-olefin unit in the component (A) is 100 mol %), and a content of the nonconjugated polyene unit is 2 wt % to 20 wt % (where a total amount of the component (A) is 100 wt %); the component (B) is an organic peroxide; and the component (C) is a thermosetting prepolymer.Type: GrantFiled: December 18, 2014Date of Patent: November 7, 2017Assignee: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Tetsuji Takezawa, Sadayuki Nakano
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Publication number: 20160304710Abstract: The rubber composition contains the following component (A), the following component (B), and the following component (C). The component (A) is an ethylene-?-olefin-nonconjugated polyene copolymer rubber containing an ethylene unit, an ?-olefin unit, and a nonconjugated polyene unit, a number of carbon atoms of the ?-olefin unit is 3 to 20, a limiting viscosity measured in 135° C. tetralin is 2.8 dl/g to 5 dl/g, a content of the ethylene unit is 70 mol % to 90 mol % (where a total of the content of the ethylene unit and a content of the ?-olefin unit in the component (A) is 100 mol %), and a content of the nonconjugated polyene unit is 2 wt % to 20 wt % (where a total amount of the component (A) is 100 wt %); the component (B) is an organic peroxide; and the component (C) is a thermosetting prepolymer.Type: ApplicationFiled: December 18, 2014Publication date: October 20, 2016Inventors: Tetsuji TAKEZAWA, Sadayuki NAKANO
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Patent number: 8962776Abstract: Provided is an ethylene-?-olefin-nonconjugated polyene copolymer having ethylene units, ?-olefin units and nonconjugated polyene units, wherein the copolymer satisfies the following requirements: (A): the intrinsic viscosity [?] is 0.5 to 1.8 dl/g, (B): the content of ethylene units is 50 to 90 mol % and the content of ?-olefin units is 50 to 10 mol % where the sum total of the contents of ethylene units and ?-olefin units is taken as 100 mol %, (C): the iodine value is 1 to 50, (D): the ratio of tan ? taken at 100° C. and 2 cpm to tan ? taken at 100° C. and 1000 cpm is from 1.0 to 1.7, and (E): the ratio of the Z-average molecular weight to the number average molecular weight is from 15 to 25 and the weight average molecular weight to the number average molecular weight is from 3 to 5.Type: GrantFiled: December 18, 2012Date of Patent: February 24, 2015Assignee: Sumitomo Chemical Company, LimitedInventor: Sadayuki Nakano
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Publication number: 20140316091Abstract: Provided is an ethylene-?-olefin-nonconjugated polyene copolymer having ethylene units, ?-olefin units and nonconjugated polyene units, wherein the copolymer satisfies the following requirements: (A): the intrinsic viscosity [?] is 0.5 to 1.8 dl/g, (B): the content of ethylene units is 50 to 90 mol % and the content of ?-olefin units is 50 to 10 mol % where the sum total of the contents of ethylene units and ?-olefin units is taken as 100 mol %, (C): the iodine value is 1 to 50, (D): the ratio of tan ? taken at 100° C. and 2 cpm to tan ? taken at 100° C. and 1000 cpm is from 1.0 to 1.7, and (E): the ratio of the Z-average molecular weight to the number average molecular weight is from 15 to 25 and the weight average molecular weight to the number average molecular weight is from 3 to 5.Type: ApplicationFiled: December 18, 2012Publication date: October 23, 2014Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Sadayuki Nakano
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Patent number: 8586674Abstract: The copolymer rubber composition comprises 60 to 75% by weight of a copolymer rubber (1) and 40 to 25% by weight of a copolymer rubber (2), and exhibits a difference in iodine value of 5 to 30 between the copolymer rubber (1) and the copolymer rubber (2). The copolymer rubber (1) is an ethylene-?-olefin-nonconjugated polyene copolymer rubber having an ethylene unit of 50 mol % to 70 mol %, an ?-olefin unit of 50 mol % to 30 mol %, and an iodine value of 10 to 30, and the copolymer rubber (2) is an ethylene-?-olefinic copolymer rubber having an ethylene unit of more than 70 mol % and 95 mol % or less, an ?-olefin unit of less than 30 mol % and 5 mol % or more, and an iodine value of 0 to 8.Type: GrantFiled: April 20, 2012Date of Patent: November 19, 2013Assignee: Sumitomo Chemical Company, LimitedInventor: Sadayuki Nakano
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Patent number: 8426522Abstract: The copolymer rubber composition comprises 60 to 75% by weight of a copolymer rubber (1) and 40 to 25% by weight of a copolymer rubber (2), and [iodine value of the copolymer rubber (1)?iodine value of the copolymer rubber (2)] is 5 to 30. The copolymer rubber (1) is an ethylene-?-olefin-nonconjugated polyene copolymer rubber having an ethylene unit of 50 mol % to 70 mol %, an ?-olefin unit of 50 mol % to 30 mol %, and an iodine value of 15 to 45, and the copolymer rubber (2) is an ethylene-?-olefinic copolymer rubber having an ethylene unit of more than 70 mol % and 95 mol % or less, an ?-olefin unit of less than 30 mol % and 5 mol % or more, and an iodine value of 10 to 30.Type: GrantFiled: November 10, 2011Date of Patent: April 23, 2013Assignee: Sumitomo Chemical Company, LimitedInventor: Sadayuki Nakano
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Publication number: 20120202947Abstract: The copolymer rubber composition comprises 60 to 75% by weight of a copolymer rubber (1) and 40 to 25% by weight of a copolymer rubber (2), and exhibits a difference in iodine value of 5 to 30 between the copolymer rubber (1) and the copolymer rubber (2). The copolymer rubber (1) is an ethylene-?-olefin-nonconjugated polyene copolymer rubber having an ethylene unit of 50 mol % to 70 mol %, an ?-olefin unit of 50 mol % to 30 mol %, and an iodine value of 10 to 30, and the copolymer rubber (2) is an ethylene-?-olefinic copolymer rubber having an ethylene unit of more than 70 mol % and 95 mol % or less, an ?-olefin unit of less than 30 mol % and 5 mol % or more, and an iodine value of 0 to 8.Type: ApplicationFiled: April 20, 2012Publication date: August 9, 2012Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Sadayuki NAKANO
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Publication number: 20120059123Abstract: The copolymer rubber composition comprises 60 to 75% by weight of a copolymer rubber (1) and 40 to 25% by weight of a copolymer rubber (2), and [iodine value of the copolymer rubber (1)?iodine value of the copolymer rubber (2)] is 5 to 30. The copolymer rubber (1) is an ethylene-?-olefin-nonconjugated polyene copolymer rubber having an ethylene unit of 50 mol % to 70 mol %, an ?-olefin unit of 50 mol % to 30 mol %, and an iodine value of 15 to 45, and the copolymer rubber (2) is an ethylene-?-olefinic copolymer rubber having an ethylene unit of more than 70 mol % and 95 mol % or less, an ?-olefin unit of less than 30 mol % and 5 mol % or more, and an iodine value of 10 to 30.Type: ApplicationFiled: November 10, 2011Publication date: March 8, 2012Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Sadayuki NAKANO
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Patent number: 7838591Abstract: A process for producing a vulcanized molded article of a rubber composition, which comprises the steps of (1) kneading, at least, 100 parts by weight of a defined ethylene-?-olefin-non-conjugated polyene copolymer rubber (A), 1 to 150 parts by weight of a reinforcement (B), and 1 to 150 parts by weight of a softener (C), (2) mixing the resultant kneaded product with 0.1 to 10 parts by weight of a vulcanizing agent (D), and (3) hot forming the resultant rubber composition; and a vibration-proof material comprising a vulcanized molded article of a rubber composition produced by the above process.Type: GrantFiled: November 22, 2005Date of Patent: November 23, 2010Assignee: Sumitomo Chemical Company, LimitedInventors: Sadayuki Nakano, Tatsuo Sassa
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Publication number: 20100222445Abstract: The copolymer rubber composition comprises 60 to 75% by weight of a copolymer rubber (1) and 40 to 25% by weight of a copolymer rubber (2), and [iodine value of the copolymer rubber (1)—iodine value of the copolymer rubber (2)] is 5 to 30. The copolymer rubber (1) is an ethylene-?-olefin-nonconjugated polyene copolymer rubber having an ethylene unit of 50 mol % to 70 mol %, an ?-olefin unit of 50 mol % to 30 mol %, and an iodine value of 15 to 45, and the copolymer rubber (2) is an ethylene-?-olefinic copolymer rubber having an ethylene unit of more than 70 mol % and 95 mol % or less, an ?-olefin unit of less than 30 mol % and 5 mol % or more, and an iodine value of 10 to 30.Type: ApplicationFiled: February 24, 2010Publication date: September 2, 2010Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Sadayuki Nakano
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Publication number: 20100222515Abstract: The copolymer rubber composition comprises 60 to 75% by weight of a copolymer rubber (1) and 40 to 25% by weight of a copolymer rubber (2), and exhibits a difference in iodine value of 5 to 30 between the copolymer rubber (1) and the copolymer rubber (2). The copolymer rubber (1) is an ethylene-?-olefin-nonconjugated polyene copolymer rubber having an ethylene unit of 50 mol % to 70 mol %, an ?-olefin unit of 50 mol % to 30 mol %, and an iodine value of 10 to 30, and the copolymer rubber (2) is an ethylene-?-olefinic copolymer rubber having an ethylene unit of more than 70 mol % and 95 mol % or less, an ?-olefin unit of less than 30 mol % and 5 mol % or more, and an iodine value of 0 to 8.Type: ApplicationFiled: February 25, 2010Publication date: September 2, 2010Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventor: Sadayuki NAKANO
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Publication number: 20090176916Abstract: There is provided a rubber composition containing the following components: (A): an ethylene-?-olefin-nonconjugated polyene copolymer rubber, (B): a natural rubber, (C): an organic peroxide, (D): an aromatic amine compound, and (E): silica.Type: ApplicationFiled: December 2, 2008Publication date: July 9, 2009Applicants: SUMITOMO CHEMICAL COMPANY, LIMITED, TOKAI RUBBER INDUSTRIES, LTD.Inventors: Sadayuki Nakano, Toyohisa Tohyama, Fumihiko Jinno
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Publication number: 20090093580Abstract: There is provided a rubber composition containing the following components: (A): an ethylene-?-olefin-nonconjugated polyene copolymer rubber, (B): a natural rubber, (C): an organic peroxide, (D): an aromatic amine compound, and (E): an aluminum-based inorganic compound.Type: ApplicationFiled: September 8, 2008Publication date: April 9, 2009Applicants: SUMITOMO CHEMICAL COMPANY, LIMITED, TOKAI RUBBER INDUSTRIES, LTD.Inventors: Sadayuki NAKANO, Norihito Kimura, Toyohisa Tohyama
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Publication number: 20070225446Abstract: A resin composition for impact-resistant moldings with high low-temperature impact strength, and an air bag cover made of this resin composition are provided. The resin composition, or a thermoplastic elastomer composition for impact-resistant moldings, is produced by a process comprising subjecting 15 to 40% by weight of component (A), 15 to 40% by weight of component (B) and 20 to 70% by weight of component (C) (taking the total of the components (A), (B) and (C) as 100% by weigh) to a dynamic heat treatment in the presence of a crosslinking agent, said components being as specified below: (A): an ethylene-?-olefin-non-conjugated diene copolymer rubber having a density of 850 to 900 kg/m3, a Mooney viscosity (ML1+4(100° C.)) of 30 to 150, and an ethylene unit content of 30 to 90; (B): an ethylene-?-olefin-non-conjugated diene copolymer rubber having a density of 850 to 900 kg/m3 and a Mooney viscosity (ML1+4(100° C.)) of 30 to 150, and an ethylene unit content which is 0.50 to 0.Type: ApplicationFiled: March 1, 2007Publication date: September 27, 2007Applicant: SUMITOMO CHEMICAL COMPANY, LIMITEDInventors: Sadayuki Nakano, Noboru Komine