A grease composition containing: (a) the reaction product of: (i) a calcium containing overbased organic acid; and (ii) a copolymer derived from monomers containing (1) an olefin; and (2) an unsaturated dicarboxylic acid anhydride or derivatives thereof and (b) an oil of lubricating viscosity, wherein the overbased calcium sulphonate contains colloidally dispersed calcium carbonate is selected from the group consisting of calcite, vaterite and mixtures thereof. The invention further relates to the process to make the composition and its use in greases to increase water resistance.
一种润滑脂组合物,含有:(a) 以下物质的反应产物(i)含
钙的过基有机酸;和(ii)由含有(1)烯烃;和(2)不饱和二
羧酸酐或其衍
生物的单体衍生的共聚物;和(b)具有润滑粘度的油,其中过基
磺酸钙含有胶体分散的
碳酸钙,
碳酸钙选自
方解石、
硫铁矿及其混合物组成的组。本发明还涉及该组合物的制造工艺及其在润滑脂中的使用,以提高其防
水性。