C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 16/24 (2006.01) C08F 14/18 (2006.01) C10M 145/26 (2006.01) C10M 147/04 (2006.01)
Patent
CA 2527421
Compounds usable as stabilizing additives of perfluoropolyether fluids working at high temperatures, higher than 200°C, and/or in the presence of metals and/or in the presence of Lewis acids, are formed of (per)fluoropolyether chains and of end groups having a heteroaromatic structure, according to the following general formula: T1-CFW1-O-R f-CFW2-T2 (I) wherein - T1, T2, equal to or different from each other, have the following meanings: - F, CF3, C2F5, (C2F4)Cl - -CH2-B-Y, -CH(CF3)O-Y, wherein: - B = O, S; - Y is a substituent formed of a ring having a heterocyclic structure having the following formula: (see above formula) wherein: R1, R2, R3, R4, equal to or different from each other are H, linear or branched C1-C8 perfluoroalkyl, NO2, CN, preferably H; with the proviso that at least one of the two end groups T1, T2 is -CH2-B-Y or -CH(CF3)O-Y, wherein B and Y are as above; - W1, W2, equal to or different from each other, are -F, -CF3; Rf is a (per)fluoropolyoxyalkylene chain having a number average molecular weight between 500 and 10,000, preferably between 800 and 5,000.
Russo Antonio
Tonelli Claudio
Gowling Lafleur Henderson Llp
Solvay Solexis S.p.a.
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