Colloidal products containing calcium, and / or magnesium, as well as sulfur and nitrogen, their preparation and their use in particular as additives in lubricating oils.

摘要

P The colloidal products described are obtained by at least partial neutralization of the basicity reserve of at least one overbased sulfonate charged with calcium carbonate and / or magnesium carbonate dispersed within micelles, by means of at least a functional dicarboxylic acid of general formula: BR/ (CF DRAWING IN BOPI) BR/ BR/ where each symbol a is an integer from 1 to 8, x and z are each a number from 1 to 4 , y is an integer from 0 to 4 and n is 1 or 2. These products can be used as additives in lubricating oils. /P