| abstract |
New lubricating greases, the oily component of which is perfluoropolyether or fluoropolyether derivative of formula R--O--Q--CFX--(Y) n --Z, having a number average molecular weight ranging from 1,500 to 10,000. n wherein n R is perfluoroalkyl radical R F or Z(Y) n )--CFX; n Q is perfluoroalkylpolyether or fluoroalkylpolyether chain; n X is F or CF 3 ; n Y is a linking divalent radical; n n is zero or 1; and n Z is a radical selected from --CH 2 OH, --CH 2 OR 1 , --COOR 2 , --CONR 3 R 4 etc. . . . or from particular radicals containing heteroatoms or particular aromatic radicals. |