Abstract: Desirable thermoplastic vulcanizates can be prepared from a polar engineering thermoplastic; a halogenated copolymer of p-alkylstyrene and an isomonoolefin having from 4 to 7 carbon atoms; and either an ethylene rubbery polymer or a diene based rubbery polymer or combinations thereof. The ethylene rubbery polymer desirably has at least one pendant carboxylic acid group, amine group, epoxy group, hydroxyl group or an anhydride of two carboxylic acid groups or combinations thereof. Desirable diene based rubbery polymers include epoxidized natural rubber and epoxidized homopolymers and copolymers of dienes.
Abstract: A crosslinkable composition comprising from 30 to 90 percent by weight of an epoxidized monohydroxylated polydiene polymer which is comprised of at least two polymerizable ethenically unsaturated hydrocarbon monomers wherein at least one is a diene monomer which yields unsaturation which is suitable for epoxidation, 8 to 60 percent by weight of an amino resin crosslinking agent, and 2 to 40% by weight of a reinforcing agent. The invention also encompasses a process to make such compositions by prereacting the three components with a small portion of the crosslinking catalyst required to crosslink the composition for 0.5 to 10 hours at 60.degree. to 120.degree. C. The preferred polymer for use herein has the formula(HO).sub.x --A--S.sub.z --B--(OH).sub.