摘要 |
This invention discloses a fluorochemical composition comprising a condensation product of a diisocyanate or triisocyanate and at least one polyether obtainable by reacting a fluorochemical substituted epoxide of formula (I) with a compound of formula (II) HX 1 -B-X 2 H or (III) (R f ') k -L 2 -X 2 H wherein: B represents an organic residue obtained by removing the groups HX 1 and HX 2 from the compound in formula (II); X 1 and X 2 are each independently selected from the group consisting of O, NH and S; L 1 represents an organic divalent linking group; L 2 represents an organic linking group having a valence of k+1; k is an integer of 1 to 10; R f and R f ' are each independently selected from the group consisting of perfluorinated and partially fluorinated aliphatic groups; s is 0 or 1; and a is 0 or 1. The fluorochemical composition is particularly suitable for imparting stain release properties to a substrate. Further disclosed are a method of preparation of the fluorochemical composition and a method of treatment of a substrate with the fluorochemical composition. |