NITRILE COPOLYMER RUBBER COMPOSITION AND RUBBER CROSSLINK

摘要

A nitrile copolymer rubber composition of the present invention contains from 35 wt% to 85 wt% of an alpha,beta-ethylenically unsaturated nitrile monomeric unit (a1), from 15 wt% to 65 wt% of a conjugated diene monomeric unit (a2) which may be at least partially hydrogenated, from 0 wt% to 30 wt% of a cationic monomeric unit (a3), and from 0 wt% to 50 wt% of an aromatic vinyl monomeric unit (a4). The present invention contains a nitrile copolymer rubber (A) whose combined content of the alpha,beta-ethylenically unsaturated nitrile monomeric unit (a1) and the aromatic vinyl monomeric unit (a4) is from 35 wt% to 85 wt%, a vinyl chloride resin (B), and a plasticizer (C) having a specific structure.