The invention discloses a
halogen-free
flame retardant dynamically vulcanized EPDM / PP
thermoplastic elastomer and a preparation method thereof. The EPDM / PP
thermoplastic elastomer is prepared from, by
mass, 100 parts of EPDM, 40-80 parts of
polypropylene, 1-3 parts of crosslinking agent, 1-3 parts of auxiliary crosslinking agent, 44-78 parts of composite
halogen-free
flame retardant agent, 0.5-1 part of
silane coupling agent, 1-2 parts of
lubricant, and 1-2 parts of anti-oxidant. The preparation method comprises the steps of firstly mixing uniformly the composite
halogen-free
flame retardant agent and the
silane coupling agent, adding EPDM, PP and
lubricant, alloying, plasticizing the mixture, extruding, granulating, and finally adding the crosslinking agent, auxiliary crosslinking agent and the anti-oxidant, alloying, plasticizing, extruding the mixture and granulating. The EPDM / PP
thermoplastic elastomer not only has a good flame retardant property which can attain the flame retardant level of UL94-V0, but also has an excellent
mechanical property, anti-
aging property and
hydrolysis resistance. The halogen-free flame retardant dynamically vulcanized EPDM / PP
thermoplastic elastomer has the advantages of being simple in preparation process, low in production cost, and easy for industrialized production.