The invention discloses a screen
phenol-containing thiadiazole type antioxygen
antiwear additive and a preparation method thereof, wherein the chemical name of the additive is 2-(3,5-di-tert-butyl-4-hydroxy-benzyl)
thio-5-alkylthio 1,3,4-thiadiazole. According to the preparation method, 2,5-dimercapto-1,3,4-thiadiazole is adopted as a
raw material, the 2,5-dimercapto-1,3,4-thiadiazole and a halogenated
alkane are subjected to a
nucleophilic substitution reaction under a catalyst effect to generate monoalkyl thiadiazole, and the monoalkyl thiadiazole,
formaldehyde and 2,6-di-tert-butylphenol are subjected to a condensation
polymerization reaction under a catalyst effect to obtain 2-(3,5-di-tert-butyl-4-hydroxy-benzyl)
thio-5-alkylthio 1,3,4-thiadiazole type lubricating oil multifunction additive, wherein the additive is characterized in that good
oxidation resistance, extreme pressure property,
wear resistance and
corrosion resistance are provided for the
lubricant with the additive, and the additive can be combined with other additives to provide good
synergy effects, can be adopted to partly or completely replace ZDDP, and is applicable for
internal combustion engine oils and industrial lubricating oils.