New type blocked isocyanate co-oligomers containing both fluoroalkyl and cation segments were synthesized. In the antimicrobial activity tests, all co-oligomers showed the high antibacterial activities against both Escherichia coli and Staphylococcus aureus.
　By using these co-oligomers, antisoiling, antibacterial modifications of textiles (especially cellulose) were studied. Through measuring contact angles and XPS spectra, it was shown that the textile surfaces modified with fluoroalkylated co-oligomers containing ammonium and phosphonium segments changed to water- and oil-repellent, namely antisoiling, while non-fluoroalkylated oligomers could not change the surfaces to water- and oil-repellent.
　The surfaces modified with the co-oligomer containing phosphonium segments were found to exhibit a high antibacterial activity against Staphylococcus aureus, but not against Escherichia coli. Moreover, the co-oligomers containing phosphonium segments were found to retard the multiplication of Aureobasidium pullulans and Cladosporium even when the concentration of oligomers was lower than 0.01%.

DESCENTE SPORTS SCIENCE Vol.27/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE