anti-ozone waxes

experience. performance. in the way our formulated anti-ozone waxes provide added mileage to your product, protecting it along the way

Okerin™ anti-ozone wax for tires

The Okerin brand originally established by Astor in the UK and further developed by Paramelt, has found extensive global application amongst all of the major international tire manufacturers.

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Protektor™ and Akcera™ anti-ozone wax for technical rubber

In technical applications such as belts, hoses, gaskets and mats and shoes soles Akcera™ and Protektor™ brands have been established to meet the specific demands of these technical products.

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Okerin™ Akcera™ and Protektor™ anti-ozone waxes have been carefully formulated with a selected blend of highly efficient mineral and synthetic waxes to provide optimal protection in a range of application scenarios.

Paramelt produces anti-ozone waxes in Europe (Netherlands) and Asia (China), allowing global manufacturers with diverse regional sites the possibility of sourcing anti-ozone wax with equivalent profiles from the most advantageous location to ensure continuity of supply and optimized operational logistics.

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high performance anti-ozone waxes for reliable protection

Atmospheric ozone is able to attack the double-bonds of unprotected rubber compounds by a free-radical mechanism. This reaction occurs quite rapidly and quickly leads to surface breakdown visible as cracks in the structure of the material. One way to protect rubber articles such as tires from perishing in this manner, is to introduce a migratory barrier material into the rubber compound which exudes to the surface of the rubber and forms a protective layer against free-radical degradation. One of the most common additive solutions is the use of hydrocarbon waxes of varying chain length and morphology to provide protection across a range of temperature and time scale requirements.

Protective compounding of rubber involving physical protection of the surface using a wax film is by no means a new concept, with the first patent claiming such protection dating back to 1881. Over the intervening years a lot has been learned about the key factors influencing compatibility and migration rates as well as the development of new wax types and fractions.

Atmospheric ozone attacks the double bonds of unprotected rubber rapidly, forming an unstable structure known as molozonide. This is the first destructive step because a chain has been broken. This localized surface attack makes ozone degradation visible as surface cracks perpendicular to the direction of stress.

When articles are exposed to tensile strain greater than a threshold value during exposure, cracks grow continuously at a constant rate. The rate of ozone degradation is proportional to the ozone concentration and accelerated by rise in temperature.

Incorporated during rubber compounding, blended waxes, carefully formulated with paraffin and microcrystalline waxes of the right molecular weight distribution will migrate to the surface of the rubber article after vulcanization to form a thin protective film which acts as a barrier for optimum ozone protection.

This protective film of anti-ozone wax:

  • is thin, non-crystalline and reasonably flexible
  • assists the transport of chemical agents (anti-ozonants) from inside of the rubber articles to the surface
  • prevents water soluble rubber chemicals (in predominantly stressed articles) from being washed out

For any given wax in a specific rubber compound, there is a marked dependence on migration rate and generally, a peak migration temperature is found. As a result both temperature and rubber formulation are critical factors affecting wax performance. Therefore, to achieve long-term protection across a given temperature window, it is necessary to build a suitable blend of waxes to provide the required migration at different time and temperature intervals.

It is therefore critical to define the expected operating temperature environment as well as the time scale over which protection is required in order to accurately formulate the required wax package.

Paramelt offers a comprehensive range of Okerin anti-ozone waxes, formulated to provide optimal performance at different operating temperature ranges in a number of different rubber systems.  These products are used by a vast majority of global tire manufacturers and are known for their consistent quality and performance.

The standard products cover a number of typical operating environments, such as:

  • broad temperature range protection
  • high temperature range protection
  • low - medium temperature protection
  • medium - high temperature protection
  • moderate temperature, long service life performance

These products are able to cover the majority of typical tire applications encountered but we have the knowledge required to develop bespoke products for your specific requirements should this be needed.

anti-ozone wax is in our dna

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