Synthesis and study of new thiocarbonic and thiocyanic acid derivatives as extreme pressure additives to motor oils

The article describes the synthesis of 2-butoxymethoxy-1-bromo-3-chloropropane, new as synthon, on the basis of which a number of new derivatives of 2-butoxymethoxypropylene -2-chloroxanthogenate, diethylditocarbamate and thiocyanates containing a simple ether group in the molecule are obtained. The synthesized compounds were studied as extreme pressure additives in MC-20 oil on a four-ball friction machine (FFM). Research results have shown that these compounds have high extreme pressure properties. The relationship between the extreme pressure efficiency of the obtained compounds with their composition and structure was revealed. It has been established that with the introduction of a simple ether group (-OCH2OC4H9), the tribological properties of these compounds are improved. The structure of 2-butoxymethoxypropylene -2-chloroxanthogenate, diethylditocarbamate and thiocyanates derivatives has been proven by determining their physicochemical characteristics, elemental analysis, and also by IR spectroscopy data.