Patent ID: 9556319
Date: 2017-01-31
CPC Classifications: B29B,B29K,B29L,C08J,Y02W

Claim:
1. A process for devulcanizing EPDM rubber comprising the steps of: introducing sulfur-cured EPDM to an extruder; introducing from about 0.5 to about 20 wt % of a sulfur scavenging agent to the extruder, based upon the total weight of the EPDM and the sulfur scavenging agent, wherein the sulfur scavenging agent is introduced so as to scavenge sulfur to protect against degradation of the extruder; and mixing and masticating the EPDM within the extruder in the presence of the sulfur scavenging agent at a temperature sufficient to at least partially devulcanize the sulfur-cured EPDM.