The present invention describes a polyamide-rubber blended composition having improved resistance to ozone, stress whitening and gasoline prepared by mixing together with heating the following components:
(a) from 70 to 20 volume percent of a rubber composi- tion consisting of:
(i) 30 to 70 volume percent of an acrylonitrile-butadiene copolymer containing at least 0.7 weight percent of a carboxyl group in the polymer, and
(ii) 70 to 30 volume percent of an epichlorohydrin rubber;
(b) 30 to 80 volume percent of a polyamide resin; and
(c) at least 0.1 parts by weight of a polyepoxy compound in terms of the weight of the epoxy group per 100 parts by weight of the rubber composition of component (a), components (a) and (b) blended together after which component (c) is added and the resulting mixture kneaded with heat to form the polyamide-rubber blended composition.
本发明描述了一种聚酰胺-橡胶混合组合物,该组合物具有更好的耐
臭氧性、应力增白性和耐汽油性,其制备方法是将以下成分混合在一起并加热:
(a) 70 至 20 体积百分比的橡胶组合物,该组合物包括
(i) 30 至 70 体积百分比的
丙烯腈-
丁二烯共聚物,聚合物中至少含有 0.7 重量百分比的羧基,以及
(ii) 70%至 30%体积的
环氧氯丙烷橡胶;
(b) 30%至 80%体积分数的聚酰胺
树脂;和
(c) 至少 0.1 重量份的聚环氧化合物(以每 100 重量份的橡胶组合物中环氧基团的 重量计算),组分(a)、组分(a)和组分(b)混合在一起,然后加入组分(c),所得混合物加热捏合,形成聚酰胺橡胶混合组合物。