| abstract |
Compounds suitable for being used as lubricants, having the general formulaorwhereR = -CF<sub>3</sub>, -C<sub>2</sub>F<sub>s</sub>, or -C<sub>3</sub>F<sub>7</sub>;X = F, or -CF<sub>3</sub>;R" = F -CF<sub>3</sub>, or -C<sub>2</sub>F<sub>5</sub>;m = an integer from 3 to 100;n = a finite integer, or zero, wherein m + n is from 3 to 100, provided that, when n is finite, m/n is from 5 to 20 and R is preferably -CF<sub>3</sub>, while when n is zero R is preferably -C<sub>2</sub>F<sub>5</sub> or -C<sub>3</sub>F<sub>7</sub>;x = a finite integer, or zero;y,z = finite integers, such that x+y+z is from 5 to 200, while (x+z)/y is from 5 to 0.5, provided that, when x is zero z/y is from 1 to 0.5 and y+z is from 5 to 200, while X is preferably F, and R" = L;L = a group Y-Z, whereY = -CH<sub>20</sub>-, -CH<sub>2</sub>0CH2-, -CF<sub>2</sub>-, or -CF<sub>2</sub>0-;Z = an organic, non-aromatic, non-fluorinated radical, free from activated hydrogen atoms, containing two or more electron-doublet-donor heteroatoms, or an aromatic radical, either or not containing heteroatoms, capable of giving rise to coordinative bonds or to charge-transfer bonds, thus causing various kinds of adsorption phenomena on metallic polymeric or ceramic surfaces. |