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Lubricating Oil Antiwear Additive----Molybdenum Dialkyldithiocarbamate

2018-09-05
Saving energy and reducing environmental pollution and impact on human activities are the common concerns of the world. As one of the main energy consumables, the energy conservation of automobiles is becoming more and more important. How to improve the fuel economy of automobile engines has become an urgent problem to be solved. Adding friction modifiers to automotive lubricants is one of the effective ways to improve fuel economy.
 
Advantages of MoDTC
Molybdenum Dialkyldithiocarbamate(MODTC) is an important class of friction modifiers and extreme pressure agents. The organic molybdenum is dissolved in various lubricants in a liquid form, so that the lubricating component forms a physical and chemical adsorption film having friction reducing and anti-wearing effects on the friction surface under mild working conditions. Adding 0.5% to 1.0% oil-soluble organic molybdenum (in terms of molybdenum) to advanced lubricants is an effective way to improve fuel economy, durability and durability. Molybdenum dialkyl dithiocarbamate (MoDTC) is a highly competitive product in the organic molybdenum series. The oil-soluble MoDTC contains no phosphorus compared with the existing molybdenum dialkyldithiophosphate in the market, thus reducing the poisoning of the automobile exhaust gas purifier, and the amount of the lubricating oil additive is increasing year by year.
 
Lubrication mechanism of MoDTC
Lubricating oil consists of  base oil and a series of additives that form a specific adsorption film on the friction surface in the boundary lubrication and mixed lubrication conditions. When the machine moves, the load pressure of the metal friction surface is high, and the bump on the metal contact surface is deformed by the extremely high pressure to increase the friction of the contact surface. Since MoDTC contains polar atoms such as S, O, and N, it can affinity with the metal surface, forming an oil film containing MoS2, Fe, FeS, FeO, etc. under high temperature and high pressure, thereby producing antifriction and antifriction and increasing the extreme pressure. . Among them, sulfur is an antioxidant, and a high content of S is antioxidant at the molecular level from the inside, providing lubricating oil with oxidation stability. The thermal decomposition of MoDTC is an endothermic process that absorbs the transient high temperatures generated by metal contact friction, reduces oil temperature, protects lubricating oil quality, and extends oil change intervals.