Antiozonant

An antiozonant, also known as anti-ozonant, is an organic compound that prevents or retards damage caused by ozone. The most important antiozonants are those which prevent degradation of elastomers like rubber. A number of research projects study the application of another type of antiozonats to protect plants.

Protection of elastomers[]

Elastomers like rubber, including related materials like butyl rubber and EPDM rubber are prone to ozone cracking. Antiozonants are used to prevent or delay that. In particular, they are additives in tire manufacturing.^[1]

The most common antiozonants for elastomers are N,N′-substituted p-phenylenediamines, which can be categorized in three types:

• Dialkyl p-Phenylenediamines,
• Alkyl-aryl p-Phenylenediamines, such as 6PPD (N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine)^[2] or IPPD (N-isopropyl-N′-phenyl-p-phenylenediamine)^[3]
• Diaryl p-Phenylenediamines, like DPPD
• 6-ethoxy-2,2,4-trimethyl-1,2-dihydroquinoline (ETMQ, EMQ, or Ethoxyquin) is an antioxidant
• Paraffin waxes that just form a surface barrier^[4]

Protection of plants[]

For the protection of plants like winter wheat^{[citation needed]} or maize^[5] Ethylene diurea (EDU) has been used successfully as antiozonant.

See also[]

• Stabilizer (chemistry)
• Stabilizers for polymers
• Antioxidant

References[]

External links[]

• Review of antiozonants (TheFreeLibrary)

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