Process for forming hard shaped molded article of a cross-linked liquid polybutadiene or polyisoprene resin and a butadiene or isoprene containing solid polymer and resulting articles

摘要

A forming process for producing a hard shaped molded article that includes subjecting a moldable thermosetting composition to a high temperature cure condition at a temperature greater than about 250° C. and less than the decomposition temperature of the composition to form a crosslinked polymeric network. In particular, the invention features a forming process for producing a hard shaped molded article that includes the steps ofPP(a) providing a moldable thermosetting composition that includes 1) a polybutadiene or polyisoprene resin which is a liquid at room temperature and which has a molecular weight less than 5,000 and a large number of pendent vinyl groups and 2) a solid butadiene- or isoprene-containing polymer (e.g, a thermoplastic elastomer) ;PP(b) forming the composition into a shape; andP P(c) curing the composition to produce the article including subjecting the composition to a high temperature cure condition at a temperature greater than about 250° C. and less than the decomposition temperature of the composition.