COLLOIDAL PRODUCTS CONTAINING CALCIUM, BARIUM AND/OR MAGNESIUM AS WELL AS BISMUTH, AND BEING MODIFIED BY SULPHUR- AND OPTIONALLY NITROGEN-CONTAINING CARBOXYLIC ACID ACTIVITY

摘要

Colloidal products prepared according to a method which includes at least partial neutraliation of an over-based colloidal product such as bismuth sulphonate containing a supply of alkalinity in the form of calcium carbonate, barium or micellar magnesium, by means of at least one sulphur- and optionally nitrogen-containing carboxylic acid. Said products may be used as wear and extreme-pressure additives in lubricating oils and greases.