Improved grease compositions comprise a major amount of an oil based metal soap thickened base grease selected from the group consisting of simple metal soap thickened base grease, complex grease and failed complex grease, at least one sulfur and phosphorus containing composition, an overbased metal salt of an organic acid, a hydrocarbyl phosphite, and an aliphatic group substituted carboxylic acid or anhydride thereof, wherein the aliphatic group contains at least about 12 carbon atoms in amounts sufficient to increase the dropping point of the base grease, as measured by ASTM Procedure D-2265 by at least 15°C, the phosphorus and sulfur compound being described in detail herein.
改进型润滑脂组合物包含一种主要量的油基
金属皂增稠基础润滑脂,该基础润滑脂选自由简单
金属皂增稠基础润滑脂、复合润滑脂和失效复合润滑脂、至少一种含
硫和
磷的组合物、一种有机酸的过基
金属盐、一种
亚磷酸烃基、和脂肪族取代的
羧酸或其酸酐,其中脂肪族至少含有约 12 个碳原子,其含量足以使基础润滑脂的滴点(按 ASTM 程序 D-2265 测量)至少提高 15°C,
磷和
硫化合物在此详述。