| 摘要 |
<p>An unsaturated nitrile/conjugated diene copolymer having a Mooney viscosity of 15 to 65 and containing at least 0.03 mol of C12-C16 alkylthio groups per 100 mol of the constituent monomer units in its molecule, wherein the alkylthio group contains at least three tertiary carbon atoms and a sulfur atom directly bonded to at least one of the tertiary carbon atoms. The copolymer is produced by copolymerizing an unsaturated nitrile compound with a conjugated diene in the presence of a free-radial initiator by using an alkanethiol compound having the above-mentioned alkylthio group as a molecular weight modifier. A rubber composition is prepared by blending this copolymer with a sulfur-containing vulcanizer.</p> |
