Abstract: Phosphorus-containing borate as lubricating oil additive preparation was disscussed which had high hydrolytic stability and good abrasion resistance by boric acid and lauryl alcohol and phosphorus pentoxide, and the esterification method was adopted, ethanol was choosed as dehydrant. The optimum reaction conditions were the molar ratio of cetyl alcohol and boric acid and phosphorus pentoxide as 7∶2∶1,reaction temperature was 105-110 ℃, and dehydration 4 h. The anti-wear properties of the base oil containing the additive were tested with four-ball apparatus. The results showed that phosphorous borate additives could remarkably improve the antiwear properties of the base oil and additives existde an optimum value. The phosphorus-cotaining borate as lubricant additive were used in tank workshop of the New Northeast Electric Group, as a result, the lubrication effect and the anti-wear performance were very appropriate.

Key words: phosphorus-containing borate;lubricant additive;wear resistance