Method of manufacture of polybutadiene and polyisoprene based thermosetting compositions

A forming process for producing an article comprising:

• providing a thermosetting composition comprising a polybutadiene or polyisoprene resin, and an unsaturated butadiene or isoprene containing copolymer capable of participating in crosslinking with said polybutadiene or polyisoprene resin, said copolymer is a styrene-butadiene-styrene triblock copolymer;
• and
• curing said composition to produce said article by subjecting said composition to a high temperature cure condition in an inert atmosphere at a temperature greater than about 250° C. and less than the decomposition temperature of said composition.

A form process for producing an article comprising:

• providing a thermosetting composition comprising a polybutadiene or polyisoprene resin, and a syndiotactic 1,2-polybutadiene rubber;
• and
• curing said composition to produce said article by subjecting said composition to a high temperature cure condition in an inert atmosphere at a temperature greater than about 250° C. and less than the decomposition temperature of said composition.