| 摘要 |
The present invention is directed to a polymer blend having improved properties comprising: (A) 90 to 10% by weight of a thermoplastic or thermosetting resin; and (B) 10 to 90% by weight of a shear-treated rubber obtained by subjecting a nitrile group-containing highly saturated copolymer rubber to a high-shear treatment in the presence of an anti-oxidant so as to lower the Mooney viscosity of the copolymer rubber by 15 units or more, said shear-treated rubber having a Mooney viscosity of 5 to 135, a molecular weight distribution (Mw/Mn) of 3.0 to 5.0 and a storage stability characterized by that the incremental increase in the Mooney viscosity of said shear-treated rubber during a 30 day storage under an ambient condition in air is not more than 10 units.
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