EPDM reclaimed rubber is more ozone-resistant than other types of reclaimed rubber, but because many EPDM reclaimed rubber products need to be exposed to outdoor environment for a long time, such as wire and cable and waterproofing membrane, they are more susceptible to ozone erosion ; Properly raise the ozone resistance of EPDM reclaimed rubber products, for ensuring the performance of EPDM reclaimed rubber products, to extend the service life of great significance. So what method can improve the ozone resistance of EPDM rubber products?
1, when it comes to improving the ozone resistance of EPDM reclaimed rubber products, the easiest way is to add an appropriate amount of ozone-resistant protective agent in the product formulations to prevent cracking of EPDM reclaimed rubber products after ozone erosion Phenomenon; such as PPDS (ie, phenylenediamines) antiozonants, can give a good ozone resistance of recycled rubber, 6PPDs can be used as an effective anti-ozone agent EPDM rubber products under dynamic conditions, 6PPD ( Long-term effective) and 77PPD (short-term effective) and can fully improve the EPDM rubber products ozone resistance.
2, all the fillers will reduce the ozone resistance of reclaimed rubber, so in the production of EPDM reclaimed rubber products, we must control the amount of filler, such as carbon black, the filler and recycled rubber products ozone resistance The impact of the minimum.
3, paraffin wax can be used as a physical anti-ozone agent, under the static conditions to improve EPDM rubber products, ozone resistance can be formulated in the product appropriate to add low molecular weight paraffin wax, high molecular weight wax or microcrystalline wax and other wax Of the blend.
4, add a certain amount of talc, EPDM rubber products to improve the ozone resistance.
5, containing EPDM reclaimed rubber and carbon black filled sidewall compound, adding the right amount of silica, can effectively improve the rubber compound ozone resistance, tear resistance.
Different types of EPDM reclaimed rubber products use different occasions, different performance, the requirements for ozone resistance are also different, rubber products companies according to their own needs of rubber products, their own production conditions, choose a reasonable way to improve EPDM Ozone resistance of recycled rubber products.
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