Patent ID: 9725547
Date: 2017-08-08
CPC Classifications: C08F,C08K,C08L

Claim:
1. Vulcanizable composition comprising: (i) at least one optionally fully or partly hydrogenated nitrile rubber containing epoxy groups and comprising repeat units derived from at least one conjugated diene, at least one α,β-unsaturated nitrile and optionally one or more further copolymerizable monomers, but not from a nonconjugated cyclic polyene; (ii) at least one Lewis base and/or at least one Brønsted base as a crosslinker, wherein: (iii) at least one crosslinking accelerator selected from the group consisting of thiurams, xanthogenates, dithiocarbamates and carbamates, where the Lewis and/or Brønsted base (ii) must be different from the defined group of crosslinking accelerators (iii), crosslinkers other than those mentioned in (ii) are present in the vulcanizable composition only in an amount of less than 2.5 parts by weight based on 100 parts by weight of the optionally fully or partly hydrogenated nitrile rubber (i) containing epoxy groups, and crosslinking accelerators other than those mentioned in (iii) are present only in an amount of less than 2.5 parts by weight based on 100 parts by weight of the optionally fully or partly hydrogenated nitrile rubber (i) containing epoxy groups.