Synthesis, Characterization and Application of Polyurethane Modifying Polyether Block Polysiloxane

In this article, a HO-terminated polyether-block-polysiloxane intermediate (PESO) was firstly synthesized by the hydrosilylation of Si-H terminated polydimethylsiloxane with an allyl polyether, then a polyurethane modifying polyether-b-polysiloxane (TESO) was prepared by the reaction of PESO with 2,4-toluene diisocyanate (TDI). Chemical structure and film-forming ability of TESO as well as its application on fabrics were characterized and investigated by IR, H-1-NMR, scanning electronic microscope (SEM) and other instruments. Experimental results indicate TESO had a good compatibility with cationic/anionic resins or auxiliaries, and could form a hydrophilic, relatively smooth film on the cotton fabric. The binding rigidity of the cotton fabric treated by TESO clearly decreased from 146.5[warp (w)] and 318.8[fill (f)] mN to 106(w) and 189(f) mN, meanwhile the winkle recovery angle of the treated fabric increased from 129 degrees to 220.8 degrees. But the wettability of the treated cotton fabric is only 2 '' 68. All indicate TESO offers a good softening property, elasticity and an excellent wettability to the treated fabrics.