What is "antiozonant"

n. Any chemical compound that prevents or slows down the degradation of material by ozone gas in the air.

An antiozonant, also known as anti-ozonant, is an organic compound that prevents or retards the degradation of material caused by ozone ( ozone cracking). Antiozonants are used as additives to plastics and rubber, especially in tire manufacturing.

Common antiozonants include:

• p-Phenylenediamines such as 6PPP (N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine) or IPPD (N-isopropyl-N'-phenyl-p-phenylenediamine)
• 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline (ETMQ)
• Ethylene diurea (EDU)
• Paraffin waxes that form a surface barrier.