A shrink-proofing agent for keratin fibers and a process for shrink-proofing using the same

摘要

The invention provides a shrink-proofing agent which is a non-chlorinated compound, and is sufficiently resinified only by heating in a drying step, and further has an excellent shrink-resistant performance and an excellent washing resistance and can retain the texture characteristic of keratin fibers. The invention uses the shrink-proofing agent containing a water-soluble heat-reactive urethane prepolymer wherein a part of isocyanate groups are reacted with an active hydrogen compound to introduce hydrophilic groups and the remaining isocyanate groups are blocked with a blocking agent which regenerates isocyanate groups by heating treatment.