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Santopreneâ¢ (TPV) is a thermoplastic vulcanizate. Santoprene is fully dynamically vulcanized ethylene propylene diene monomer (EPDM) rubber in a thermoplastic matrix of polypropylene (PP). It looks, feels and behaves like rubber but, due to the PP content, offers simple, flexible part design and manufacturing.
Since Santoprene TPV is a mixture of products (PP, EPDM rubber and other products) it cannot be attributed a CAS number. The constituents of Santoprene TPV have a CAS number, but these are the proprietary information of ExxonMobil Chemical.