CROSSLINKING COMPOSITION FOR BUTYL RUBBER OR HALOBUTYL RUBBER AND EPIHALOHYDRIN RUBBER BLENDS

摘要

CROSS-LINKING COMPOSITION FOR BUTYL RUBBER ORHALOBUTYL RUBBER AND EPIHALOHYDRIN RUBBER BLENDSAbstract of the DisclosureDisclosed are cross-linking compositions having both sul-fur and nonsulfur curative systems which are particularlyadapted for cross-linking rubber blends of (a) from about 35%to about 85% halobutyl rubber or a mixture of butyl rubber andhalobutyl rubber wherein the halobutyl rubber is at least 50%by weight of the mixture and (b) from about 15% to about 65%of an epihalohydrin rubber, and to the rubber materials cross-linked therewith. The rubber materials cross-linked withthese cross-linking compositions have an excellent balance ofcure rate, cure state and scorch safety; have improved tirecarcass adhesion and good impermeability to gases; and areuseful in tire inner tubes and inner liners.