Fluorochemical composition containing a condensation product of a fluorochemical polyether and a poly-isocyanate to impart stain release properties to a substrate

摘要: This invention discloses a fluorochemical composition comprising condensation product of diisocyanate or triisocyanate and at least one polyether obtainable by reacting substituted epoxide formula (I) with compound (II) HX1-B-X2H (III) (R?f?')k-L?2-X2?H wherein: B represents an organic residue obtained removing the groups HX?1 HX2? from in (II); X?1 X2? are each independently selected group consisting O, NH S; L1 divalent linking group; L2 having valence k+1; k is integer 1 to 10; R?f? Rf' perfluorinated partially fluorinated aliphatic groups; s 0 1; 1. The particularly suitable for imparting stain release properties substrate. Further disclosed method preparation treatment substrate composition.