A fluorine-free fibrous treatment composition comprising an isocyanate-derived ethylenically unsaturated monomer-containing oligomer, and a treatment method

摘要

The fluorine-free composition comprises (i) at least one isocyanate-reactive (i.e., functionalized) oligomer comprising from 2 to 20 repeating units; (ii) one or more polyisocyanates; (iii) optionally, one or more additional isocyanate-reactive compounds; And (iv) optionally, at least one compound derived from a reaction mixture comprising at least one isocyanate blocking agent; The isocyanate-reactive oligomer is prepared by a radical-initiated reaction of a reaction mixture comprising at least one mercaptan and at least one (meth) acrylate monomer, and the at least one (meth) acrylate monomer is reacted with one or more isocyanate- Containing group (s) (e.g., urethane or urea groups) and at least one hydrocarbon group having at least 16 carbon atoms (and in some embodiments, at most 60 carbon atoms). Such compositions are useful for treating fibrous substrates to improve their water repellency.