| abstract |
[project] provides the dispersed excellent rubber composition of filler；There are also the cross-linking agents that abrasion performance etc. is excellent；The part that rolling resistance performance improves, can take into account the raising of driving stability and the raising of ice face grip performance uses the composition or the tire of the cross-linking agent.[solution] rubber composition, solid rubber (A) relative to 100 mass parts, the filler (C) of modified liquid diene series rubber (B) containing 0.1 ~ 10 mass parts and 20 ~ 150 mass parts, the modified liquid diene series rubber (B) obtains and to unmodified Liquid diene system rubber (B') addition modification compound and has the functional group from the modified compound, the butadiene unit that it is 50 mass % or more relative to whole monomeric units that the modified liquid diene series rubber (B), which meets following (i) ~ (iv): (i) and contains,；(ii) weight average molecular weight (Mw) is 25000 ~ 120000；(iii) the addition amount of modified compound is 3 ~ 40 mass parts relative to the unmodified Liquid diene system rubber (B') of 100 mass parts；(iv) the average functional group number of modified liquid diene series rubber (B) each molecule is 5 ~ 80. |