SOFT, FATIGUE RESISTANT ELASTOMERIC ARTICLES

摘要

A soft, fatigue resistant vulcenizate adapted for transmitting load between moving mechanical parts comprising (a) 100 parts by weight of crosslinked elastomer, (b) a fatigue enhancing amount of substantially internally saturated, substantially linear polymer that (i) is made from monomers consisting essentially of isobutylene, (ii) is a strain crystallizable, elastic solid at 20.degree.C and (iii) has a viscosity average molecular weight (Flory) above about 1.3 million, (c) about 5 to 200 parts by weight particulate, the elastomer being crosslinked with (d) a curative in an amount sufficient to crosslink the elastomer, wherein the polymer of (b) is dispersed throughout the elastomer of (a) in a discrete microscopic phase.