A lubricating composition includes an oil of lubricating viscosity and an ionic tetrahedral borate compound which includes a cation and a tetrahedral borate anion which includes a boron atom, the boron atom having at least one aromatic bidentate di-oxo ligand. The compound may be represented by formula (I), where R1 and R2 are selected from C1-48 hydrocarbyl groups or together form a substituted or unsubstituted 5- or 6-membered ring; R3 and R4 together represent a substituted or unsubstituted aromatic ring; m is 0 or 1; X is hydrogen, a C1-24 hydrocarbyl group, —OR5, —NHR5, or ═O, R5 is a C1-24 hydrocarbyl group; M represents the cation; and n is at least 1. The cation may be selected to provide detergent and/or dispersant properties to the lubricating composition. In the case of ammonium cations, the molecular weight may be 260 g/mol or higher for providing a highly soluble compound, particularly when X is ═O.
一种润滑组合物包括一种具有润滑粘度的油和一种离子型四面体
硼酸盐化合物,该化合物包括一个阳离子和一个四面体
硼酸盐阴离子,该阴离子包括一个
硼原子,该
硼原子具有至少一个芳香族双齿二氧配位体。该化合物可由式(I)表示,其中 R1 和 R2 选自 C1-48 羧基或共同形成取代或未取代的 5 或 6 元环;R3 和 R4 共同代表取代或未取代的芳环;m 为 0 或 1;X 为氢、C1-24 羧基、-OR5、-NHR5 或═O,R5 为 C1-24 羧基;M 代表阳离子;n 至少为 1。阳离子的选择可为润滑油组合物提供清洁剂和/或分散剂特性。在
铵阳离子的情况下,分子量可为 260 克/摩尔或更高,以提供高溶解性化合物,特别是当 X 为 ═O 时。