Isocyanate derivatives comprising fluorochemical oligomers

A fluorochemical composition comprising one or more fluorinated compounds, each of the latter comprising:

• (i) a fluorochemical oligomeric portion comprising an aliphatic backbone with a plurality of fluoroaliphatic groups attached thereto, each fluoroaliphatic group comprising a fully fluorinated terminal group and each independently linked to a carbon atom of the aliphatic backbone through an organic linking group containing from 1 to about 20 carbon atoms;
• p1 (ii) an organic moiety substantially unreactive to isocyanates under conditions conventionally employed to react a nucleophile with an isocyanate;
• (iii) a non-polymeric isocyanate-derived linking group, which links the fluorochemical oligomeric portion to the organic moiety;
• and
• (iv) bonded thereto, a siloxanyl group which can impart a soft hand, a polyoxyalkylene group that can impart stain release, a long chain alkyl group that can impart water repellency, or a blocked isocyanato group that can impart a durable property when the compound is applied to a fibrous substrate, with the proviso that any group that can impart stain release is bonded to the fluorochemical oligomeric portion.