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公开(公告)号：US20230040071A1
公开(公告)日：2023-02-09
申请号：US17757521
申请日：2020-11-24
发明人： Akiko OGIWARA , Yasuhiro SHODA , Kenjiro YANAI
IPC分类号： C08F236/02 , C08K5/1545 , C08K3/36 , B60C1/00
摘要： Provided is a rubber composition being excellent in cut resistance while maintaining good elongation fatigue resistance. The rubber composition of the present disclosure contains a rubber component containing 70% by mass or more of natural rubber, a filler containing at least silica, and a cyclic polyol compound having a hydrocarbyl group of 0.1 parts by mass to 2 parts by mass with respect to 100 parts by mass of the natural rubber in the rubber component.
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公开(公告)号：US20220372232A1
公开(公告)日：2022-11-24
申请号：US17761497
申请日：2020-09-11
发明人： Yasuhiro SHODA , Hideyuki OTSUKA , Daisuke AOKI
摘要： The present invention provides: a rubber composition having a good low heat generation property and is excellent in high elastic modulus and fracture resistance, and a tire using the rubber composition. The rubber composition contains a rubber component that contains a diene rubber, and the diene rubber contains a polymer (A) of a copolymer that has, in one molecule, a block moiety containing a urethane backbone segment and a block moiety containing a diene backbone segment.
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公开(公告)号：US20220289950A1
公开(公告)日：2022-09-15
申请号：US17634157
申请日：2020-08-20
发明人： Kyohei KOTANI , Takafumi ASAKURA , Yasuhiro SHODA
IPC分类号： C08L9/00 , C08F236/08 , C08L7/00 , C08K3/04 , B60C1/00
摘要： Provided is rubber composition that can improve wear resistance and cutting resistance while having good fuel efficiency when applied to a tire. The rubber composition contains a rubber component containing natural rubber and/or synthetic isoprene rubber, and syndiotactic 1,2-polybutadiene, where the syndiotactic 1,2-polybutadiene has a crystal content of 7 J/g to 40 J/g and a number-average molecular weight of 6.5×104 or more.
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公开(公告)号：US20210171743A1
公开(公告)日：2021-06-10
申请号：US16768789
申请日：2018-10-17
发明人： Yasuhiro SHODA
摘要： The rubber composition of the present invention contains: a rubber component (A) containing a butadiene-based rubber and 30% by mass or more of a natural rubber; a filler (B); 30 to 55 parts by mass of a softening agent (C) relative to 100 parts by mass of the rubber component (A); and 1 to 6 parts by mass of a linear polyhydric alcohol (D) relative to 100 parts by mass of the rubber component (A), wherein the softening agent (C) contains a softening agent (C1) which has a high affinity to the natural rubber in an amount of 0 parts by mass or more and less than 15 parts by mass relative to 100 parts by mass of the rubber component (A) and contains a softening agent (C2) which has a high affinity to the butadiene-based rubber in an amount of 10 parts by mass or more relative to 100 parts by mass of the rubber component (A). From the rubber composition, a crosslinked rubber composition having a good balance between low heat generation property and crack resistance can be obtained.
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公开(公告)号：US20190144641A1
公开(公告)日：2019-05-16
申请号：US16099752
申请日：2017-02-01
发明人： Yasuhiro SHODA
IPC分类号： C08L9/00 , C08L7/00 , C08K3/04 , C08K5/1535 , C08K5/1545 , B60C1/00
摘要： The present invention is concerned with a rubber composition containing a cyclic polyol compound having a hydrocarbyl group and a hydroxy group and having two or more and ten or less cyclic structures; carbon black; and a rubber component. A crosslinked rubber obtained from such a rubber composition is excellent in crack resistance and elongation at break at a high temperature.
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6.发明申请公开(公告)号：US20220213240A1
公开(公告)日：2022-07-07
申请号：US17607147
申请日：2020-04-21
发明人： Yasuhiro SHODA , Shun TANEMURA
IPC分类号： C08F210/02 , B60C1/00
摘要： An object of the present disclosure is to provide a polymer exhibiting reduced heat generation in a low strain region. To achieve the object, the present disclosure provides a multi-component copolymer, comprising a non-conjugated olefin unit, a conjugated diene unit, and an aromatic vinyl unit, characterized in that: a ratio [(C100-120/C0-1000)×100] of crystallinity (C100-120) derived from the non-conjugated olefin unit at 100-120° C. with respect to crystallinity (C0-100) derived from the non-conjugated olefin unit at 0-100° C., as measured by a differential scanning calorimeter (DSC), is 23% or less.
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公开(公告)号：US20210340363A1
公开(公告)日：2021-11-04
申请号：US17274328
申请日：2019-07-31
发明人： Yasuhiro SHODA , Olivier TARDIF
IPC分类号： C08L23/08 , C08F236/06 , C08F236/08 , B60C1/00
摘要： Provided is a rubber composition that can achieve excellent breaking resistance while having high operability. A rubber composition comprises: a rubber component containing a multicomponent copolymer that contains a conjugated diene unit, a non-conjugated olefin unit, and an aromatic vinyl unit; and at least one selected from an ethylene-α olefin copolymer and an ethylene-aromatic vinyl copolymer each having a number-average molecular weight of 500 to 30,000.
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公开(公告)号：US20210317289A1
公开(公告)日：2021-10-14
申请号：US17271933
申请日：2019-07-31
发明人： Yasuhiro SHODA
摘要： Provided is a rubber composition that can achieve excellent breaking resistance while having high operability. A rubber composition comprises: a rubber component containing a multicomponent copolymer that contains a conjugated diene unit, a non-conjugated olefin unit, and an aromatic vinyl unit; and an α-olefin having a number-average molecular weight (Mn) of 50 to 1,000.
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