To provide a tire rubber composition that has lower rolling resistance, and improved wet performance and abrasion resistance compared to conventional levels.
A tire rubber composition is characterized in that: 2-50 pts.wt. of an aromatic modified terpene resin with a softening point of at least 100°C and a total of 60-130 pts.wt. of two types of silica, silica X and silica Y, are added to 100 pts.wt. of a diene rubber that includes 5-50 wt.% of a terminal-modified S-SBR having a vinyl unit content of at least 25 wt.% and a glass transition temperature of at most -50°C; the functional group of the modified S-SBR is reactive with a silanol group; a reinforcing filler comprising of silica X, silica Y and optionally added carbon black includes the silica at a proportion of at least 85 wt.%; the specific surface area of silica X as determined by nitrogen absorption is at least 140 m2/g; the specific surface area of silica Y as determined by nitrogen absorption is 100-140 m2/g exclusive; and if the respective masses of silica X and silica Y per 100 pts.wt. of the diene rubber are expressed as x pts.wt. and y pts.wt., the relationship x/7<y≤x is satisfied.
| JP2009138157A | 2009-06-25 | |||
| JP2009263587A | 2009-11-12 | |||
| JP2011132307A | 2011-07-07 | |||
| JP2011094012A | 2011-05-12 | |||
| JP2008101127A | 2008-05-01 | |||
| JP2013036025A | 2013-02-21 | |||
| JP2009138157A | 2009-06-25 | |||
| JP2009263587A | 2009-11-12 | |||
| JP2011132307A | 2011-07-07 | |||
| JP2011094012A | 2011-05-12 | |||
| JP2008101127A | 2008-05-01 | |||
| JP2013036025A | 2013-02-21 |
| WO2013057993A1 | 2013-04-25 | |||
| WO2013057993A1 | 2013-04-25 |
Takayoshi in the daytime
Shinichi Ogawa
Takashi Noguchi
Kenji Sato
Isao Hirai
Masao Sakaizawa
Kazuhiko Saishita