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1. 发明公开

EP4368666A1 RUBBER COMPOSITION FOR TIRE 审中-公开
公开(公告)号：EP4368666A1
公开(公告)日：2024-05-15
申请号：EP22837276.9
申请日：2022-03-25
申请人： The Yokohama Rubber Co., Ltd.
发明人： SUGIMOTO Hiroki , NAKAJIMA Rie
IPC分类号： C08L9/06 , B60C1/00 , C08K3/36 , C08L101/00
CPC分类号： Y02T10/86 , C08K3/36 , B60C1/00 , C08L9/06 , C08L101/00
摘要： To provide a rubber composition for a tire providing wet grip properties and wear resistance in a compatible manner. The rubber composition contains from 10 to 50 parts by mass of a thermoplastic resin in 100 parts by mass of a diene rubber containing 60 mass% or more of a styrene-butadiene rubber having a styrene content of from 5 to 30 mass% and a vinyl content of from 10 to 35 mass%. In a mixture containing the diene rubber and the thermoplastic resin in a mass ratio of 1:1, a difference (Tga-Tgm) between a theoretical value (Tga) of a glass transition temperature of the mixture calculated based on an average glass transition temperature (Tg1) of the diene rubber and a glass transition temperature (Tg2) of the thermoplastic resin, and a measurement value (Tgm) of a glass transition temperature of the mixture, is from 5 to 50°C, and a difference (Tg2-Tg1) between Tg2 and Tg1 is from 110 to 150°C. An amount of the thermoplastic resin is 30 mass% or more in 100 mass% total of a plasticizer component contained in the rubber composition.

2. 发明公开

EP3187531A1 TIRE RUBBER COMPOSITION AND PNEUMATIC TIRE 有权
标题翻译：轮胎橡胶组合物和气胎轮胎
公开(公告)号：EP3187531A1
公开(公告)日：2017-07-05
申请号：EP15835446.4
申请日：2015-08-24
申请人： The Yokohama Rubber Co., Ltd.
发明人： SUGIMOTO Hiroki , ASHIURA Makoto
IPC分类号： C08L15/00 , C08L7/00 , C08K3/36 , B60C1/00
CPC分类号： C08L53/025 , B60C1/0016 , C08K3/36 , C08L7/00 , C08L15/00 , C08L2205/03 , Y02T10/862 , C08L9/06 , C08L91/00 , C08L47/00 , C08K3/04 , C08K3/22 , C08K5/09 , C08K3/06 , C08K5/548 , C08K5/47
摘要： An object of the present invention is to provide: a rubber composition for a tire having a low viscosity and an excellent workability, and exhibiting an excellent wet performance and low rolling resistance, when formed into a tire; and a pneumatic tire using the rubber composition for a tire. The rubber composition for a tire of the present invention contains diene-based rubber and silica. The diene-based rubber contains natural rubber and specific conjugated diene-based rubber. The content of the natural rubber in the diene-based rubber is 30 to 45 mass%. The content of the specific conjugated diene-based rubber in the diene-based rubber is 30 to 70 mass%. The specific conjugated diene-based rubber is conjugated diene-based rubber produced according to a specific production method. In the conjugated diene-based rubber, the aromatic vinyl unit content, the vinyl bond content, and the weight average molecular weight are within a predetermined range. The CTAB adsorption specific surface area of the silica is 180 m 2 /g or greater. The content of the silica is less than 60 parts by mass per 100 parts by mass of the diene-based rubber.
摘要翻译：本发明的目的在于提供一种轮胎用橡胶组合物，该轮胎用橡胶组合物在形成轮胎时，粘度低，加工性优异，湿润性优异，滚动阻力低，以及使用该轮胎用橡胶组合物的充气轮胎。本发明的轮胎用橡胶组合物含有二烯系橡胶和二氧化硅。二烯类橡胶含有天然橡胶和特定的共轭二烯类橡胶。二烯系橡胶中的天然橡胶的含量为30〜45质量％。二烯系橡胶中的特定共轭二烯系橡胶的含量为30〜70质量％。特定的基于共轭二烯的橡胶是根据特定生产方法生产的基于共轭二烯的橡胶。在共轭二烯类橡胶中，芳族乙烯基单元含量，乙烯基键含量和重均分子量在预定范围内。二氧化硅的CTAB吸附比表面积为180m 2 / g以上。相对于二烯系橡胶100质量份，二氧化硅的含量小于60质量份。

3. 发明公开

EP4368667A1 RUBBER COMPOSITION FOR TIRE 审中-公开
公开(公告)号：EP4368667A1
公开(公告)日：2024-05-15
申请号：EP22837277.7
申请日：2022-03-25
申请人： The Yokohama Rubber Co., Ltd.
发明人： SUGIMOTO Hiroki , NAKAJIMA Rie
IPC分类号： C08L9/06 , B60C1/00 , C08K3/36 , C08L101/00
CPC分类号： Y02T10/86 , C08K3/36 , B60C1/00 , C08L9/06 , C08L101/00
摘要： To provide a rubber composition for a tire providing performance on snow and dry grip performance in a compatible manner. The rubber composition contains from 10 to 50 parts by mass of a thermoplastic resin in 100 parts by mass of a diene rubber containing 60 mass% or more of a styrene-butadiene rubber, the styrene-butadiene rubber having a styrene content of from 5 to 30 mass% and a vinyl content of from 10 to 35 mass%. In a mixture containing the diene rubber and the thermoplastic resin in a mass ratio of 1:1, a difference (Tga-Tgm) between a theoretical value (Tga) of a glass transition temperature of the mixture calculated based on an average glass transition temperature (Tg1) of the diene rubber and a glass transition temperature (Tg2) of the thermoplastic resin, and a measurement value (Tgm) of a glass transition temperature of the mixture, is lower than 5°C, and a difference (Tg2-Tg1) between the glass transition temperature (Tg2) of the thermoplastic resin and the average glass transition temperature (Tg1) is from 50 to 105°C. An amount of the thermoplastic resin is 30 mass% or more in 100 mass% total of a plasticizer component contained in the rubber composition.

4. 发明授权

EP3187531B1 TIRE RUBBER COMPOSITION AND PNEUMATIC TIRE 有权
公开(公告)号：EP3187531B1
公开(公告)日：2019-03-13
申请号：EP15835446.4
申请日：2015-08-24
申请人： The Yokohama Rubber Co., Ltd.
发明人： SUGIMOTO Hiroki , ASHIURA Makoto
IPC分类号： C08L15/00 , C08L7/00 , C08K3/36 , B60C1/00 , C08L53/02

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