USE OF AN OLIGOMER-BASED ADDITIVE FOR STABILIZING A LUBRICATING COMPOSITION FOR A CONVEYOR CHAIN

摘要

The invention relates to the use of an additive comprising a mixture of oligomers that is produced from the reaction of aromatic amines chosen from: (i) the reaction with one another of diphenylamine (DPA) compounds of formula (I) below, in which the groups R1 and R2 stand for, independently of one another, a hydrogen or a linear or branched alkyl group having from 1 to 30 carbon atoms, advantageously from 4 to 12 carbon atoms, (ii) the reaction with one another of phenyl-a-naphthylamine (PAN) compounds of formula (II) below, in which the group R3 stands for a hydrogen or a linear or branched alkyl group having from 1 to 30 carbon atoms, advantageously from 4 to 12 carbon atoms, and (iii) the reaction of a (DPA) compound of formula (I) above with a (PAN) compound of formula (II) above as an agent for the stabilization of a lubricating composition for a conveyor chain subjected to a temperature of at least 120°C.