Abstract: Isophorone diisocyanate(IPDI), polyethylene glycol(PEG) were taken as monomers to synthesize waterborne polyurethane adhesive WPU through self-emulsification process. The influence of molecular weight of PEG, the molar ratio of －NCO in IPDI and －OH in PEG, the dosage of dimethylol propionic acid and ethylene diamine on the properties of waterborne polyurethane was analyzed. The intrinsic structure of WPU was characterized by Fourier transform infrared spectroscopy instrument. Then WPU was used as adhesive in pigment dyeing of cotton. The results showed the properties of self-made adhesive were as good as similar products on the market, and better than those of polyacrylate adhesive.

Key words: polyurethane; self-emulsification; adhesive; pigment dyeing