ISOBUTYLENE-BASED ELASTOMER BLENDS

摘要

The improved green strength, green elongation, and green relaxation properti es of isobutylene-based elastomers at elevated temperatures along with improved aging and barrier properties are achieved by blending semi-compatible, semi- crystalline copolymers with the isobutylene elastomers. The semi-crystalline copolymers are typically copolymers of ethylene and an alpha-olefin having from 4 to 16 carbon atoms. The improved properties are maintained in subsequent rubber compounds containing said blends and are particularly usef ul in tire and pharmaceutical container applications.