Rubber, a remarkably versatile material, owes its elasticity and flexibility to its polymer structure. However, this very structure, particularly the presence of double bonds in the polymer chains, makes it susceptible to attack by ozone. Ozone is a potent oxidizing agent that can rapidly degrade rubber, leading to embrittlement and the characteristic surface cracking that shortens the lifespan of products like tires, belts, and hoses. The development of effective protective additives has been crucial for enhancing the durability of these essential items. Among the most important of these are anti-ozone waxes.

The primary function of an anti-ozone wax is to act as a physical antioxidant. Its effectiveness lies in its unique physical property: the ability to migrate to the surface of the rubber product after vulcanization. This migration, often referred to as 'blooming,' results in the formation of a thin, continuous film of wax on the surface. This wax film serves as a physical barrier, preventing atmospheric ozone molecules from reaching and reacting with the rubber polymer chains. The composition of these waxes is typically a carefully controlled blend of different types of waxes, most commonly paraffin waxes and microcrystalline waxes. Paraffin waxes, being more linear and of lower molecular weight, tend to migrate relatively quickly. Microcrystalline waxes, with their more complex, branched structures and higher molecular weights, migrate more slowly. This combination ensures that a protective layer is established and maintained over time, providing both immediate and long-term protection.

The rate of migration is influenced by several factors, including the wax composition, the temperature of the surrounding environment, and the specific formulation of the rubber compound. A moderate migration rate is often ideal, as it allows for the continuous replenishment of the protective wax film without the wax depleting too rapidly. This gradual exuding process is key to preventing the formation of cracks, especially under static stress conditions. Furthermore, the effectiveness of anti-ozone waxes can be significantly enhanced when used in conjunction with chemical antiozonants. These chemical additives work by directly reacting with ozone or by inhibiting the degradation process. The combined action of the physical barrier provided by the wax and the chemical intervention of antiozonants offers superior protection.

NINGBO INNO PHARMCHEM CO.,LTD. is committed to providing high-quality rubber additives that are scientifically formulated to deliver optimal performance. We understand the intricate mechanisms involved in preventing surface cracking in rubber and the importance of a well-designed protective film formation. By offering advanced anti-ozone waxes, we help manufacturers enhance the durability and reliability of their rubber products, ensuring they meet the rigorous demands of modern applications.