ABSTRACT
Olefinic elastomers based upon ethylene-propylene and/or ethylene-propylene-diene monomer rubbers (EPR or EPDM) are thermoplastic by virtue of their alloying with isostatic crystalline polypropylene and/or high-density polyethylene (HDPE). These products are produced by high intensity mixing in Banburies continuous mixers, and extruders.
