PURPOSE: The titled composition useful as tire tread, etc., having improved processing properties without damaging hysteresis loss characteristics, etc., obtained by blending a specific butadiene polymer containing a tin-carbon bond in the molecular chanin with a specified amount of an extending oil having a specific viscosity-gravity constant.
CONSTITUTION: (A) 100pts.wt. butadiene polymer having 0W40wt% bonded vinyl aromatic compound content and 30W90wt% vinyl bond content of butadiene part, 40W150 Mooney viscosity, and ≤50ppm tin amount in tin-C bond contained in the polymer obtained by polymerizing 1,3 butadiene or it and a vinyl aromatic compound by the use of an organolithium compound as an initiator, and subjecting the polymer to a coupling reaction with a tin halide compound is blended with (B) 5W50pts.wt., preferably 5W35pts.wt. extending oil having 0.8W0.9 viscosity-gravity constant shown by the formula (G is gravity, V is Saybolt viscosity).
FUJINAGA YOSHIHISA
FUJIMAKI TATSUO
BRIDGESTONE CORP
| JPS58129032A | 1983-08-01 | |||
| JPS58199203A | 1983-11-19 | |||
| JPS5586827A | 1980-07-01 | |||
| JPS60223839A | 1985-11-08 | |||
| JPS60101128A | 1985-06-05 | |||
| JPS60262839A | 1985-12-26 |
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