The biggest naturally occuring threats to tires and all other synthetic and natural rubbers are ozone and ultraviolet (UV).
For ozone protection manufacturers add waxes to their compounds at common dose rates between 1 and 3 phr. During operation the tire bends and flexes. This activates the migration of the antiozonant wax to the surface of the tire forming a thin, protective wax film.
Paraffin waxes with high n-paraffin content provide rapid protection for newly produced goods.
Micro waxes especially with high molecular weight iso-paraffins guarantee slow release and long Lasting protection.
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