AUTOMATIC TRANSMISSION FLUIDS CONTAINING ESTERS OF HYDROCARBYL SUCCINIC ACID OR ANHYDRIDE WITH THIO-BIS-ALKANOLS AND METAL SALTS THEREOF

摘要

There are disclosed zinc and nickel salts of mono- or di- esters of C12-C50 aliphatic hydrocarbon substituted succinic acids or anhydrides, such as octadecenyl succinic anhydride, with thio-bis-alkanols such as dithiodiethanol. The products are useful as antioxidants for lubricating oils and functional fluids, especially automatic transmission fluids.