Rubber Process Oil (RPO) is a vital component in the manufacturing and processing of rubber products, playing an essential role in improving the workability and durability of rubber compounds. Derived from petroleum or other fossil fuels, RPO is a blend of heavy hydrocarbons that enhances the physical properties of rubber while making the production process more efficient. This oil is primarily used in industries such as automotive, construction, and footwear, where it acts as a softener and plasticizer, ensuring that rubber products achieve the desired flexibility, strength, and elasticity. Beyond improving the material's handling and processing characteristics, RPO also extends the lifecycle of rubber products by increasing resistance to wear and tear, heat, and environmental conditions. This makes it indispensable in the production of tires, conveyor belts, hoses, and other industrial rubber components, especially in demanding applications.

RPO is broadly classified into two categories: aromatic and paraffinic oils, each catering to specific industrial needs. Aromatic RPO, characterized by its high aromatic content, is ideal for applications requiring superior compatibility with natural and synthetic rubbers. It is commonly used in heavy-duty applications like tires and industrial-grade rubber due to its excellent solvency and ability to improve filler dispersion. On the other hand, paraffinic RPO, which contains a higher concentration of saturated hydrocarbons, is known for its lighter color, lower viscosity, and greater oxidation stability. It is often preferred for products that require superior weather resistance and thermal stability, such as molded rubber goods and rubber seals. The choice between these types depends on the intended application and the specific performance characteristics desired, making RPO a versatile and indispensable material in the rubber industry.