polyisoprene rubber
modern synthetic polyisoprene is designed to be similar to naturul rubber in structure and properties.Aithough it still demonstrates lower green strength , slower cure rates, lower hot tear,and lower aged properties than its natural counterpart,synthetic polyisopere exceeds the natural types in consistency of product, cure rate,processing,and purity.in addition, it is superior in mixing, extrusion ,molding,and calendering processes.