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    Chemical Antiozonants and Factors Affecting their Utility

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    The advent of chemical antiozonants has granted to the rubber industry considerable relief from the problem of ozone-cracking which has plagued it to an ever-increasing extent throughout its history. This problem, enhanced in the past two decades by increased ozone in the atmosphere and by the wide-spread application of certain synthetic rubbers, can now be controlled if not eliminated by the judicious use of one of several materials specifically tailored to this purpose. However, unless the rubber manufacturer is conscious of the influence of a large number of variables upon the potential utility of a material as an antiozonant, to a large extent the usefulness of antiozonants may be lost to him. The amount of antiozonant required to protect a rubber article from ozone degradation will depend upon such factors as: 1. Antiozonant structure, 2. Polymer type, 3. Other compounding ingredients, and 4. Exposure conditions. It is hoped that this present survey will assist prospective antiozonant users in achieving more effective protection at decreased expense.

    Author Information:

    Cox, William L.
    Universal Oil Products Co., Des Plaines, Ill.

    Committee/Subcommittee: D11.10

    DOI: 10.1520/STP46941S