(PER) fluoropolyether compounds

Details (PER) fluoropolyether compounds (PER) fluoropolyether compounds

2005-11-09

2010-02-09

Griffin, Walter D (Department: 1797)

Solid anti-friction devices, materials therefor, lubricant or se

Lubricants or separants for moving solid surfaces and...

Ptfe

C508S244000, C508S246000

Reexamination Certificate

active

07659231

ABSTRACT:
Compounds having the following formula:wherein:A and A1, equal or different, are respectively H or an aromatic end group as defined below; optionally said aromatic group being substituted;n is an integer different from zero, such that the number average molecular weight of the compound of formula (I) is in the range 1,800-50,000,T is the bivalent group —Y—CH2—CFW1—O—Rf—CFW2—CH2—Y—wherein:Y=O, S;W1and W2, equal or different, are F, CF3;Rf is a (per) fluoropolyoxyalkylene chain formed of one or more repeating units, statistically distributed along the chain; R1, R2, R3, equal to or different from each other, are selected from H; linear or branched C1-C8perfluoroalkyl, linear or branched C1-C15(per) fluorooxyalkyl; linear or branched C1-C8alkyl; linear or branched C1-C8a oxyalkyl, optionally containing one or more oxygen atoms; NO2; CN.

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