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Toluimidazoles
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One class of free radical scavengers consists of antidegradants. The amount of cure inhibition they exhibit depends on the particular chemical. Figure 8 shows the effects of various antioxidants in a formulation containing 100 phr of EPDM, dicumyl peroxide as indicated, and 0.5 phr of antioxidant.
VANOX® ZMTI
Antioxidant
A non-discoloring, nonstaining antioxidant for NR and SR. Provides very effective heat-aging resistance and flex-fatigue protection in EPDM and NBR.