| 摘要 |
<p>Compounds formed of (per)fluoropolyether chains and end groups having a pyridine structure, with structural formula:
€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒT 1 -CW 1 -O-R f -CW 2 -T 2 €ƒ€ƒ€ƒ€ƒ€ƒ(I)
wherein
T 1 , T 2 , equal to or different from each other, have the following meanings: F, CF 3 , C 2 F 5 , (C 2 F 4 )Cl; CH 2 -B-Y, CH(CF 3 )O-Y, wherein: B = O, S; €ƒ€ƒ€ƒ
wherein R 1 , R 2 , R 3 , R 4 , equal to or different from eeach other, are H, F, C 1 -C 8 linear or branched perfluoroalkyl, NO 2 , CN;
with the proviso that at least one of the two end groups T 1 , T 2 is CH 2 -B-Y or CH(CF 3 )O-Y as above defined;
W 1 , W 2 , equal to or different from each other, are -F, -CF 3 ;
Rf is a (per)fluoropolyoxyalkylene chain having a number average molecular weight from 400 to 10,000.</p> |
