| abstract |
The present invention relates to a fluorine compound composition for imparting oil repellency, water repellency and / or staining or antifouling property to a fibrous substrate. The composition of the present invention comprises an isocyanate component selected from (i) a fluorinated polyether according to formula (I), (ii) a polyisocyanate compound having at least three isocyanate groups or a mixture of polyisocyanate compounds having an average number of isocyanates per molecule of more than two, And (iii) optionally a dispersion or solution of a fluorinated compound comprising the reaction product of a combination of reactants comprising one or more co-reactants capable of reacting with isocyanate groups.n n n <Formula I>n n n R f -Q-T k n n n Wherein R f represents a monovalent perfluorinated polyether group having a molecular weight of at least 750 g / mol, Q represents a chemical bond or a divalent or trivalent organic linking group, and T represents a functional group capable of reacting with an isocyanate And k is 1 or 2. |