| abstract |
The invention provides a styrene-isoprene-butadienenterpolymer rubber having a terpolymer composition of anbound styrene content of 5-50 wt.%, a bound isoprenencontent of 0.5-10 wt.% and a bound butadiene content of 40-94.5nwt.%, a weight average molecular weight of 100,000-2,000,000,nand a vinyl bond content in the isoprene moietynof at least 30 wt.%, a preparation process thereof, and andiene rubber composition comprising the styrene-isoprene-butadienenterpolymer rubber and a reinforcing agent asnessential components. |