| abstract |
Compounds of formulan nwherein n- R f is a (per)fluoropolyoxyalkylene chain having a number average molecular weight in the range 500-10,000; n- W 1 , W 2 , equal to or different from each other, are -F or -CF 3 ; n- T 1 is equal to -CHA a -B a (CH 2 CH 2 O) na - wherein A a =H, CF 3; B a = O, S, NH; na=0 or an integer between 1 and 6; n- T 2 is equal to -F, -CF 3 , -C 2 F 5 , -(C 2 F 4 )Cl, or a group of formula:n n- Q 1 , Q 2 , equal to or different from each other, are a chain of formula -T 1 -CFW 1 -O-R f -CFW 2 -T' 2 , nwherein: T' 2 is equal to -F, -CF 3 , -C 2 F 5 , -(C 2 F 4 )Cl; or is a group of formula:n nwherein B is equal to O, S, NH; R 1 , R 2 , R 3 , R 4 , R 5 equal to or different from each other are selected from H, F, NO 2 , CN, C 1 -C 8 perfluoroalkyl, carboxyl, phenyl (Ph), O-Ph, NH-Ph, S-Ph; nwith the proviso that at least one of Q 1 and Q 2 is equal to: |