| abstract |
A process for the manufacture of a polyol (per)fluoropolyether derivative comprising:n 1. reacting at least one triol having two protected hydroxyl functions and a free hydroxyl group with an activating agent, to yield an activated protected triol; 2. reacting the activated protected triol with a functional (per)fluoropolyether derivative of formula:n nT 2 -O—R f -T 1 ,n wherein: R f represents a fluoropolyoxyalkene chain which is a fluorocarbon segment comprising ether linkages in main chain; T 1 and T 2 , equal to or different from each other, are independently selected fromn non-functional groups of formula:n n—CF 3 , —CF 2 —CF 3 , —CF 2 Cl, —CF 2 CF 2 Cl, —CF 2 —COF, —COF: andn functional hydroxyl groups comprising at least one hydroxyl group, with the provisio that at least one of T 1 and T 2 is a functional hydroxyl group as above detailed to yield a protected polyol (per)fluoropolyether derivative; and n 3. deprotecting the protected polyol (per)fluoropolyether derivative to yield the polyol (per)fluoropolyether derivative. |