Effect of Antiozonants on Rubber to Metal Adhesion

Diene rubber vulcanizates contain free double bonds which are sensitive to attack by oxygen and ozone. Natural rubber (NR), polybutadiene (BR), and blends thereof  generally contain active antiozonants, both  to protect against the degrading effects of ozone and to improve the resistance to fatigue.  This paper investigates the effect of antiozonant level and type on adhesion of an NR/BR blend to metal. Three different adhesive chemistries, representing the current state of the art in solvent based and aqueous technologies are evaluated.