Patent ID: 6562929
Filing Date: 2003-05-13
Classification: C08F,C08K,C08L,Y02T

Abstract:
A conjugated diene-based rubber obtained by copolymerizing monomers containing an olefinically unsaturated nitrile monomer, an aromatic vinyl monomer and a conjugated diene monomer, and is characterized in that the glass transition point of said conjugated diene-based rubber is âˆ’60 to 0Â° C., the difference between the extrapolated temperatures of the initiation and the termination of said glass transition is 20Â° C. or less, that has a repeating unit comprising {circle around (1)} 9 to 30% by mass of an olefinically unsaturated nitrile monomer unit, {circle around (2)} 10 to 50% by mass of an aromatic vinyl monomer unit and {circle around (3)} 20 to 81% by mass of a conjugated diene monomer unit [where the total of {circle around (1)}, {circle around (2)} and {circle around (3)} is 100% by mass], and that Mooney viscosity [ML1+4 (100Â° C.)] is 20 to 200.