USE OF BORATED COMPOUNDS FOR THE IMPROVEMENT OF THE COMPATIBILITY OF LUBRICATING OILS WITH FLUOROCARBON ELASTOMERS

摘要

The invention relates to the use of an effective quantity of borated compounds having the following general formula I: <IMG> in which X is S or O, and R is a hydrocarbyl group containing at least 3 carbon atoms, in particular between 3 and 50 carbon atoms and preferably between 3 and 17 carbon atoms, as an additive improving the compatibility of a lubricating oil composition, comprising dispersants containing basic nitrogen atoms, with fluorocarbon elastomers. In a preferred fashion, the compound of genral formula I is borated glycerol monooleate and the concentraion of the compound of general formula I is such that the % Boron/% basic N ratio of the lubricating composition varies from 0.25 to 5.