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公开(公告)号：US10479880B2
公开(公告)日：2019-11-19
申请号：US15711353
申请日：2017-09-21
发明人： Ryuichi Tokimune , Tsuyoshi Tsuchida , Ryota Kitago , Soh Ishino , Hiroyuki Kishimoto , Munenao Hirokami , Tetsuro Yamada
摘要： Provided are a rubber composition for tires which achieves both abrasion resistance and processability while maintaining fuel economy, and a pneumatic tire including the rubber composition. A rubber composition for tires, containing an organosilicon compound represented by the average compositional formula (I) below having a ratio of the number of sulfur atoms to the number of silicon atoms of 1.0 to 1.5, wherein x represents the average number of sulfur atoms; m represents an integer of 6 to 12; and R1 to R6 are the same or different and each represent a C1-C6 alkyl or alkoxy group, at least one of R1 to R3 and at least one of R4 to R6 are the alkoxy groups, and two or more of the alkyl or alkoxy groups for R1 to R6 may be joined to form a ring.
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公开(公告)号：US10377178B2
公开(公告)日：2019-08-13
申请号：US15526398
申请日：2015-11-27
摘要： The present invention aims to provide a rubber composition for tires that can improve processability, crack resistance, ozone resistance, discoloration resistance, and tire appearance while maintaining a good balance between them, and also to provide a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for tires, containing: a rubber component; an antioxidant; and polyether, the rubber component having a combined content of polybutadiene rubber, natural rubber, and polyisoprene rubber of 80% by mass or more per 100% by mass of the rubber component, the rubber composition containing the antioxidant in an amount of 0.3 to 7.0 parts by mass per 100 parts by mass of the rubber component, the polyether having an average mass content of at least two consecutive polyethylene oxide units of 85% or less of the polyethylene oxide mass content of the polyether.
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公开(公告)号：US09994699B2
公开(公告)日：2018-06-12
申请号：US14900529
申请日：2014-06-12
发明人： Tatsuya Miyazaki , Ryuichi Tokimune
CPC分类号： C08L9/00 , B60C1/00 , B60C1/0016 , B60C1/0025 , B60C2001/005 , C08K3/04 , C08K3/36 , C08K5/10 , C08K5/18 , C08L7/00 , C08L23/20 , C08L91/00 , C08L91/06 , C08L2205/02
摘要： Provided are a rubber composition for tires preventing discoloration and improving ozone resistance while maintaining or improving good elongation at break and good fuel economy, and a pneumatic tire using the rubber composition. Included is a rubber composition for tires including: a rubber component including at least one selected from the group consisting of a specific non-oil extended polybutadiene rubber and a specific oil extended polybutadiene rubber; a phenylenediamine antioxidant; a specific nonionic surfactant; and carbon black and/or silica, the rubber composition having an amount of diene rubber of 70-100% by mass per 100% by mass of the rubber component, the rubber composition having an amount of the phenylenediamine antioxidant of 1.0-8.0 parts by mass, an amount of the nonionic surfactant of 0.1-5.0 parts by mass, and a combined amount of carbon black and silica of 20-45 parts by mass, each per 100 parts by mass of the rubber component.
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公开(公告)号：US09926437B2
公开(公告)日：2018-03-27
申请号：US14894446
申请日：2014-05-19
CPC分类号： C08L7/00 , B60C1/00 , C08G2650/58 , C08K3/04 , C08K3/06 , C08L9/00 , C08L71/02 , C08L2205/02 , C08L2205/035 , C08L91/00 , C08L91/06 , C08K5/09 , C08K3/22 , C08K5/47 , C08K5/18 , C08K5/375 , C08L9/06
摘要： Provided are a rubber composition for tires, capable of improving discoloration resistance and tire appearance while maintaining good handling stability, crack resistance, and ozone resistance or improving these properties, and a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for tires including a rubber component having a combined amount of polybutadiene rubber, natural rubber, and polyisoprene rubber of 90% by mass or more based on 100% by mass of a rubber component; sulfur; a pluronic nonionic surfactant in an amount of 0.1 to 5.0 parts by mass per 100 parts by mass of the rubber component; and carbon black in an amount of 2 to 70 parts by mass per 100 parts by mass of the rubber component.
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公开(公告)号：US20140114014A1
公开(公告)日：2014-04-24
申请号：US14126746
申请日：2012-05-24
发明人： Ryuichi Tokimune , Yuko Hinohara
IPC分类号： C08K3/36
CPC分类号： C08K3/36 , B60C1/0016 , C08C19/44 , Y02T10/862 , C08L15/00
摘要： The present invention provides a rubber composition that enables to improve the fuel economy, wet-grip performance, abrasion resistance, and processability in a balanced manner, and a pneumatic tire including the rubber composition. The present invention relates to a rubber composition containing silica and a conjugated diene polymer, the conjugated diene polymer being obtained by reacting a compound containing a nitrogen atom and/or a silicon atom with an active end of a copolymer obtained by polymerizing a monomer component including a conjugated diene compound and a silicon-containing vinyl compound using a polymerization initiator represented by the following formula (I): wherein an amount of the conjugated diene polymer is not more than 90% by mass based on 100% by mass of a rubber component of the rubber composition, and an amount of the silica is 10 to 150 parts by mass per 100 parts by mass of the rubber component.
摘要翻译： 本发明提供能够以平衡的方式提高燃料经济性，湿抓地性，耐磨性和加工性的橡胶组合物，以及包含该橡胶组合物的充气轮胎。 本发明涉及含有二氧化硅和共轭二烯聚合物的橡胶组合物，该共轭二烯聚合物是通过使包含氮原子和/或硅原子的化合物与通过聚合单体成分得到的共聚物的活性末端反应得到的， 共轭二烯化合物和使用由下式（I）表示的聚合引发剂的含硅乙烯基化合物：其中相对于100质量％的橡胶组分，共轭二烯聚合物的量不超过90质量％ 的橡胶组合物，相对于100质量份的橡胶成分，二氧化硅的量为10〜150质量份。
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公开(公告)号：US10550247B2
公开(公告)日：2020-02-04
申请号：US15526430
申请日：2015-11-27
摘要： The present invention provides a rubber composition for tires which can improve crack resistance, ozone resistance, discoloration resistance, and tire appearance while maintaining a good balance between them, and also provides a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for tires, containing a rubber component having a combined content of polybutadiene rubber, natural rubber, and polyisoprene rubber of 80% by mass or more per 100% by mass of the rubber component, the rubber composition containing, per 100 parts by mass of the rubber component: 0.1 to 8.0 parts by mass of polyether (A) having a glycol ether content of 80% by mass or more and a HLB of 3.5 to 19.0, the polyether (A) excluding Pluronic nonionic surfactants; 2 to 70 parts by mass of carbon black; and 0.3 to 7.0 parts by mass of an antioxidant.
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公开(公告)号：US10280286B2
公开(公告)日：2019-05-07
申请号：US15482848
申请日：2017-04-10
发明人： Ryota Kitago , Yasumasa Bito , Ryuichi Tokimune
IPC分类号： B29B7/00 , B29B7/18 , B29B7/74 , B29B7/90 , B60C1/00 , C08J3/20 , C08J3/24 , C08K3/36 , C08K5/3417 , C08K5/3435 , C08K5/548 , B29K9/06 , B29K509/00 , B29L30/00
摘要： A method for manufacturing a rubber composition includes kneading a rubber component, an inorganic filler and a thioester-based silane coupling agent, and adding a vulcanizing agent and one or more compounds selected from the group of an imide compound and an N-oxyl compound to a mixture of the rubber component, the inorganic filler, and the thioester-based silane coupling agent such that the vulcanizing agent and the imide compound and/or the N-oxyl compound are kneaded with the mixture including the rubber component, the inorganic filler, and the thioester-based silane coupling agent.
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公开(公告)号：US09890272B2
公开(公告)日：2018-02-13
申请号：US14894248
申请日：2014-05-19
CPC分类号： C08L9/06 , B60C1/0016 , C08K3/04 , C08K3/06 , C08K3/36 , C08L21/00 , C08L71/02 , C08L2207/324
摘要： The present invention provides a rubber composition for tires and a pneumatic tire formed from the rubber composition, wherein the rubber composition can improve discoloration resistance and tire appearance while maintaining or improving good fuel economy and good abrasion resistance. The present invention relates to a rubber composition for tires containing a rubber component containing styrene-butadiene rubber in an amount of 30 to 100% by mass based on 100% by mass of the rubber component; a Pluronic-type nonionic surfactant; and sulfur, the rubber composition for tires having a combined amount of carbon black and silica of 20 to 140 parts by mass relative to 100 parts by mass of the rubber component.
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公开(公告)号：US09708476B2
公开(公告)日：2017-07-18
申请号：US14898199
申请日：2014-06-12
发明人： Tatsuya Miyazaki , Ryuichi Tokimune
CPC分类号： C08L7/00 , B60C1/00 , B60C1/0016 , B60C1/0025 , B60C2001/005 , C08K5/10 , C08K5/18 , C08L21/00 , C08L91/06 , C08L2201/08 , C08L2205/02 , C08L2205/025 , C08L2205/03 , C08L2205/035 , C08L9/00 , C08K3/04 , C08L9/06 , C08L23/16
摘要： Provided are a rubber composition for tires preventing discoloration and improving ozone resistance while maintaining or improving good elongation at break, and a pneumatic tire using the rubber composition. Included is a rubber composition for tires including: a rubber component; a naturally occurring wax containing 40-98% by mass of an ester component; a phenylenediamine antioxidant and/or a quinone antioxidant; and a specific nonionic surfactant, the rubber composition having an amount of diene rubber of 70-100% by mass per 100% by mass of the rubber component, the rubber composition having an amount of the naturally occurring wax of 0.01-5.0 parts by mass, an amount of petroleum-derived wax of 0-6.0 parts by mass, a combined amount of the phenylenediamine antioxidant and the quinone antioxidant of 1.0-8.0 parts by mass, and an amount of the nonionic surfactant of 0.1-5.0 parts by mass, each per 100 parts by mass of the rubber component.
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公开(公告)号：US11571931B2
公开(公告)日：2023-02-07
申请号：US15767741
申请日：2016-09-21
发明人： Ryota Kitago , Ryuichi Tokimune , Soh Ishino
摘要： Provided are a method for manufacturing a rubber composition for a tire and a method for manufacturing a tire including this manufacturing method for the rubber composition in the present invention, which are characterized by including the steps of: starting to knead a rubber component, a sulfur donor, and a sulfur atom-containing vulcanization accelerator together before kneading the rubber component with a filler; and then adding a filler to an obtained kneaded product and performing kneading at a kneading temperature of 120° C. or higher. According to the manufacturing methods of the present invention, a rubber composition for a tire and a tire which have good fracture property can be manufactured.
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