A metal salt or boron compound of a hydrocarbyl-substituted aromatic hydroxy compound having at least two hydroxy-substituted aromatic rings bridged by sulfur, where at least one aromatic ring bears a substituent ortho to a hydroxy group, provides a useful lubricant additive. The substituent on the aromatic ring is an α-hydroxy aliphatic hydrocarbyl group or a -C(O)R² group, where R² is hydrogen or aliphatic hydrocarbyl. Preferred salts are magnesium.
一种烃基取代的
芳香烃羟基化合物的
金属盐或
硼化合物提供了一种有用的润滑油添加剂,该化合物至少有两个羟基取代的芳香环由
硫桥连,其中至少一个芳香环上有一个羟基正交的取代基。 芳香环上的取代基是 α-羟基脂肪族烃基或 -C(O)R² 基,其中 R² 是氢或脂肪族烃基。 首选盐类为
镁盐。