A Study on the Durable Hydrophilic Finish of Synthetic Fiber (II) -The Durable Hydrophilic Finish of Synthetic Fiber with $\varepsilon$-Caprolactam-blocked PEG-TDI Prepolymer-

합성섬유의 내구성 친수화 가공에 관한 연구(II) - $\varepsilon$-Caprolactam-blocked PEG-TDI Prepolymer에 의한 합성 섬유의 내구성 친수화 가공-

This study is related to the hydrophilic finishing of synthetic fiber with ε-caprolactamblocked PEG-TDI and ε-caprolactam-blocked PEG-TDI prepolymer were synthesized and its thermal properties were investigated with IR spectroscopy, DSC and TGA. ε-Caprolactam-blocked TDI, the model compound of ε-caprolactam-blocked PEG-TDI, was dissociated to ε-caprolactam and TDI at two different temperature i.e. 148.5℃ and 152.5℃ under the atmosphere, and the dissociation temperature of ε-caprolactam-blocked PEG-TDI prepolymer to isocyanate-terminated PEG-TDI prepolymer and ε-caprolactam was suggested to be the same as that of ε-caprolactam-blocked TDI from the IR spectroscopy. Polyester fabric was padded with aqueous mixture of εcaprolactam-blocked PEG-TDI prepolymer and crosslinking agent such as N,N,N',N',-tetrakis (2-hydroxy propyl) ethylene diamine trimethylol propane and trienthanol amine, dried, and cured at 175℃, higher than the temperature of dissociation. This finished polyester fabric showed very low frictional electrostatic charge, short halflife, good wicking and soil releasing properties and these properties were durable to laundering.