It is aimed at providing an NBR composition, which composition is substantially free of containment of an insolubilized substance-generating causative substance so as to prevent generation of an insolubilized substance due to extraction by a fuel while which composition is excellent in ozone resistance, ejectability from kneader, and the like, and which composition realizes a first compression set and a second compression set which are both 46% or less.
The present invention provides an NBR composition comprising a polymer obtained by mixing an acrylonitrile-butadiene rubber (NBR) with polyvinyl chloride (PVC); wherein the NBR composition is obtained without blending an insolubilized substance-generating causative substance, or, in case of blending, by blending an insolubilized substance-generating causative substance at an upper limit of 0.15 parts by weight or less, into 100 parts by weight of the polymer having a PVC content of 15.70 to 17.50wt%.
本发明旨在提供一种
丁腈橡胶组合物,该组合物基本上不含产生不溶物的致病物质,以防止因燃料萃取而产生不溶物,同时该组合物具有优异的耐
臭氧性、从捏合机中的顶出性等,并且该组合物的第一压缩永久变形和第二压缩永久变形均小于或等于 46%。
本发明提供了一种
丁腈橡胶组合物,该组合物由
丙烯腈-
丁二烯橡胶(NBR)与聚
氯乙烯(P
VC)混合得到的聚合物组成;其中,
丁腈橡胶组合物是在不掺入产生未溶解物质的致病物质的情况下得到的,或者,在掺入的情况下,是通过在 100 份(重量)P
VC 含量为 15.70 至 17.50wt% 的聚合物中掺入上限为 0.15 份(重量)或更少的产生未溶解物质的致病物质而得到的。