| 摘要 |
Compounds having the following formula:
wherein: A and A 1 , 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-CH 2 -CFW 1 -O-Rf-CFW 2 -CH 2 -Y- wherein: Y = O, S; W 1 and W 2 , equal or different, are F, CF 3 ; Rf is a (per)fluoropolyoxyalkylene chain formed of one or more repeating units, statistically distributed along the chain; R 1 , R 2 , R 3 , equal to or different from each other, are selected from H; linear or branched C 1 -C 8 perfluoroalkyl, linear or branched C 1 -C 15 (per)fluorooxyalkyl; linear or branched C 1 -C 8 alkyl; linear or branched C 1 -C 8 oxyalkyl, optionally containing one or more oxygen atoms; NO 2 ; CN. |
