Patent ID: 7081440
Filing Date: 2006-07-25
Classification: C08G,C10M,C10N

Abstract:
1. A process for stabilizing perfluoropolyether lubricating oils at high tempertures, higher than 200° C., by mixing with said perfluoropolyether oils compounds having the following general formula (A): wherein: X, Y, X′, Y′, equal to or different, are independently the one from the other H; NO Z=—CH m and n are integers such that m is in the range 0–80, extremes included; n is in the range 0–20, extremes included, m+n being >1; the molecular weight of the perfluoropolyether part, units with indexes m and n, being from 500 to 10,000, wherein the compounds of formula (A) are mixed with the perfluoropolyether oils in a percentage from 0.2 to 5% by weight with respect to the perfluoropolyether oils weight.