Use as stabilizers of perfluoropolyether oils at high temperatures, higher than 200° C, of compounds not containing phosphor and having the general formula (A): wherein: X, Y, X', Y', equal to or different, are indenpendently the one from the other H; NO2; C1-C4 alkyl; C1-C4 alkoxy, preferably methoxy group; Z = -CH2-; > C=0 (carbonyl); 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, preferably from 1,000 to 4,000. Also published as: EP1354932 (A1), US7081440 (B2), US2003203823 (A1), JP2003327985 (A), EP1354932 (B1)
Use as stabilizers of perfluoropolyether oils at high temperatures, higher than 200°C, of compounds not containing phosphorrocess.
NAVARRINI, WALTER MAURIZIO;
2007-01-01
Abstract
Use as stabilizers of perfluoropolyether oils at high temperatures, higher than 200° C, of compounds not containing phosphor and having the general formula (A): wherein: X, Y, X', Y', equal to or different, are indenpendently the one from the other H; NO2; C1-C4 alkyl; C1-C4 alkoxy, preferably methoxy group; Z = -CH2-; > C=0 (carbonyl); 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, preferably from 1,000 to 4,000. Also published as: EP1354932 (A1), US7081440 (B2), US2003203823 (A1), JP2003327985 (A), EP1354932 (B1)I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
