Lubricating oil additive Sulfurized isobutylene is a sulfur-containing compound used in lubricating oil formulations to improve the oil’s lubrication properties. It is a multi-functional additive that can improve the anti-wear, extreme pressure and antioxidant properties of lubricants.
Sulfurized isobutylene is typically produced by reacting isobutylene with sulfur or sulfur compounds. This reaction results in the formation of sulfur-containing compounds such as sulfides, polysulfides, and disulfides. These sulfur compounds can react with metal surfaces to form a protective film that reduces friction and wear.

Additionally, sulfided isobutylene can act as an extreme pressure additive by forming a sacrificial film on metal surfaces under high loads and temperatures. The film prevents direct metal-to-metal contact and reduces wear.
Another important property of sulfurized isobutylene is its antioxidant activity. It inhibits lubricant oxidation by scavenging free radicals and preventing the formation of sludge and deposits.
Overall, sulfurized isobutylene is a valuable lubricant additive that can improve lubricant performance and life. It is primarily used in industrial applications such as automotive and industrial gear oils, hydraulic oils and metalworking fluids.


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