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.
本发明涉及一种具有改进性能的聚合物混合物,它包括(A) 90%至 10%(重量百分比)的热塑性或热固性
树脂;以及 (B) 10%至 90%(重量百分比)的剪切处理过的橡胶,该橡胶是通过在
抗氧化剂存在下对含有腈基的高饱和共聚橡胶进行高剪切处理,从而使共聚橡胶的门尼粘度降低 15 个单位或更多,所述剪切处理过的橡胶的门尼粘度为 5 至 135,分子量分布(Mw/Mn)为 3.经剪切处理的橡胶的门尼粘度为 5 至 135,分子量分布(Mw/Mn)为 3.0 至 5.0,贮存稳定性为在空气中环境条件下贮存 30 天期间,经剪切处理的橡胶的门尼粘度增量不超过 10 个单位。