-
About UsIs a joint-stock company specializing in the development and manufacturing of lubricant additives and related chemicals. It has independent right to import and export, has independent intellectual property rights and copyrights of multiple products.
-
Lubrication Horizon Lubrication Horizon
Lubrication HorizonIs a joint-stock company specializing in the development and manufacturing of lubricant additives and related chemicals. It has independent right to import and export, has independent intellectual property rights and copyrights of multiple products.
-
Our productsIs a joint-stock company specializing in the development and manufacturing of lubricant additives and related chemicals. It has independent right to import and export, has independent intellectual property rights and copyrights of multiple products.
024-31935099Dialkyl pentasulfides—environmentally friendly, chlorine-free extreme-pressure and anti-wear additive
Category:Technical exchange
Category:Lubricating oils and additives
Category:Research and Exploration
Add time:2026-06-26
Dialkyl pentasulfide is an organic sulfur‑based extreme‑pressure and anti‑wear additive. Owing to its pentasulfide chain molecular structure, outstanding extreme‑pressure load‑carrying performance, and advantages such as chlorine‑free environmental friendliness, light color, low odor, and excellent compatibility, it has emerged as one of the ideal next‑generation alternatives to traditional chlorinated paraffins. It is widely used in various heavy‑duty metalworking fluids, greases, and other lubricant formulations, serving as a key functional additive in modern lubricant formulations.
Molecular Structure and Core Properties of Ninesen® 2540 Di‑alkyl Pentasulfide
Ninesen® 2540 (dialkyl pentasulfide) is an active sulfur‑based extreme‑pressure additive developed for heavy‑load lubricant formulations. Its unique molecular structure features a symmetrical long‑chain sulfur backbone, with the general formula R–S₅–R; specifically, it is a bis‑2,4,4‑trimethylpentyl pentasulfide. The molecule’s terminal ends are saturated branched alkyl groups, providing structural stability and excellent weather resistance, while a continuous five‑atom sulfur chain links the two ends. Unlike conventional disulfides, trisulfides, or tetrasulfides with short sulfur chains, the pentasulfide chain serves as the core structural foundation for its high activity and superior extreme‑pressure performance. The molecule’s regular, symmetrical geometry ensures that sulfur‑chain scission under load is more controllable, leading to uniform and stable frictional reactions and eliminating issues such as localized over‑corrosion and sulfur precipitation or agglomeration.
Ninesen® 2540 possesses unique core characteristics that set it apart from conventional sulfur‑based additives, delivering well‑balanced performance tailored to chlorine‑free, environmentally friendly lubricant formulations. At room temperature, the product is a light‑colored, transparent, low‑viscosity liquid with minimal color and a faint, almost odorless aroma, thereby addressing the drawbacks of traditional sulfur additives—such as dark coloration, pungent odors, and adverse impacts on the appearance of finished oils. The product maintains a stable sulfur content of approximately 40 wt%, with a high active sulfur content of 36–38 wt%, and exhibits excellent temperature‑dependent activation: active sulfur is steadily released above 50°C, with activity further enhanced as temperature rises. Under high‑temperature, heavy‑load conditions, its extreme‑pressure performance remains consistently effective, with no loss of performance over time.
This product exhibits excellent oil solubility and compatibility, readily dissolving in a wide range of base oils, including paraffinic, naphthenic, synthetic esters, and PAO synthetic oils. It achieves rapid miscibility at ambient temperature without heating, simplifying the formulation process. The formulation demonstrates robust stability, with sulfur content and key performance indicators remaining consistent throughout. Moreover, it features a pure, chlorine-free, environmentally friendly design—free of halogens and toxic residues—making it a viable alternative to conventional chlorinated paraffins while mitigating environmental risks and equipment corrosion associated with chlorine‑containing additives. It can also be compounded with antioxidants, copper corrosion inhibitors, phosphate‑ester anti‑wear agents, ZDDP, and other functional additives, delivering significant synergistic performance enhancements. As such, it is one of the preferred standard raw materials for heavy‑duty extreme‑pressure formulations.
RC2540,Sulfur-containing extreme-pressure agent,Extreme-pressure anti-wear agent,Sulfur-containing compounds,Friction reducer,Highly active extreme-pressure additive,EP extreme-pressure agent
recommend News
Ninesen Lubricant Additive Co., Ltd
Service Hotline：
ZhenHua Packing Machinery
Address:
Shenyang China
ZhenHua Packing Machinery
