| abstract |
The present invention,n n n (A) a fluorochemical oligomer of formula (1),n n n (B) a bifunctional compound capable of reacting with an isocyanate,n n n (C) monofunctional compounds comprising a poly (oxyalkylene) group and capable of reacting with isocyanates,n n n (D) It is related with the manufacturing method of the fluorochemical composition containing polyurethane characterized by reacting with triisocyanate.n n n Formula 1n n n M f m M n -Q 1 -T 1 n n n In the above formula,n n n M f m M n is a fluorochemical oligomer comprising m units derived from fluorinated monomers and n units derived from fluorine-free monomers, wherein the fluorinated monomers and fluorine-free monomers may be the same or different,n n n m is about 2 to 40,n n n n is 0 to about 20,n n n T 1 is -OH or -NH 2 ,n n n Q 1 and T 1 are both organic residues obtained by removing hydrogen atoms from a chain transfer agent functionalized with T 1 . Substrates treated with fluorochemical compositions prepared according to the method show good contaminant separation properties, especially against oily and aqueous contaminants (eg wine, tea and coffee). |