ADDITIN® RC 2811

EP additives form protective layers on metal surfaces that prevent adhesive wear under boundary and mixed friction conditions. The common types of Extreme Pressure additives are sulfur- based compounds, phosphorus- based compounds, chlorine-based compounds. LANXESS has a bright product portfolio of sulfur-based products Additin® EP and phosphorus-based products Additin® AW.

Sulfur carriers are sulfur containing organic compounds, based on unsaturated raw materials like olefins, vegetable oils or unsaturated esters. They contain 2 to 5 sulfur atoms forming a kind of bridge between the olefin or ester parts. LANXESS offers sulfur carriers under the brand name Additin® EP.

EP additives form protective layers on metal surfaces that are less shear stable than the metals' structure. Through this, they prevent adhesive wear under boundary and mixed friction conditions under high pressure and elevated temperature.

Adhesive wear is also known as ”cold welding”, “scuffing” or “galling”. It is caused by the microscopic transfer of material between metallic surfaces when they are in contact and sliding against each other, particularly under high temperature and/or high pressure conditions. It results in tremendous wear on metallic parts and can even result in the total failure of components or machinery.

They are essential ingredients of most metalworking fluids, industrial lubricants like gear oils or slideway oils and EP greases.

They prevent cold welding of the gears tooth faces and flanks under high pressure conditions, particularly during starting, stopping or shock load processes.

This finally depends on the specific process or application in which the lubricant is supposed to be used. Our Application Technology team is happy to support you with further information. Please contact us here.

Sulfur carriers, chlorinated paraffins, some phosphorus compounds.

Short chain chlorinated paraffins (chain-length C10 – C13) are already banned and eliminated from metalworking fluid formulations in Europe and many other countries, due to their persistency in the environment with a high potential for bioaccumulation, and because of their classification as toxic to aquatic organisms, carcinogenic to rats and mice and possibly carcinogenic to humans. Medium chain chlorinated paraffins (chain-length C14 – C17) are also already banned or at least supposed to be banned in many countries within the next years because of their risks to the ecosystem and to human health. Many chlorinated paraffins are categorized according to the globally harmonized system of classification and labelling of chemicals as “very toxic to aquatic life with long lasting effects”. Sulfur carriers do not show any kind of hazard classification.

Depending on the specific metalworking process and the metal that is machined, different sulfur carriers or synergistic combinations of sulfur carriers and other additives can even exceed the performance of CLPs in metalworking fluids. In case you need recommendations or guideline formulations for specific metalworking applications, please contact our Application Technology team.