ESTERS OF 1,1-BIS-(HYDROXYCARBONYLMETHYLTHIO) -1-PHENYLETHANE -ANTI-RUST ADDITIVES TO LUBRICATING OILS
Various 1,1-bis-(alkoxycarbonylmethylthio)-1-phenylethanes have been obtained through the esterification reaction of 1,1-bis-(hydroxycarbonylmethylthio)-1-phenylethane with diverse aliphatic alcohols. The compounds have been examined as additives to M-8 and M-12 oils. It found that the synthesized compounds essentially improve anti-rust (protective) properties of oils. The best results go to 1,1-bis-(tridecyloxycarbonylmethylthio)-1-phenylethane which at a concentration of 1% excels by its anti-rust properties an urea succinimide additive (СИМ) taken as comparison standard.