Synthesis and Characterization of New Self-Colored Blue Waterborne Polyurethane Based on a Colorant Diol as Chain Extender

Abstract

A series of novel self-colored blue waterborne polyurethanes (BPUs) were successfully synthesized by incorporating a self-made colored diol 1,4-bis(2-hydroethylamino)anthrancene-9,10-dione (BHAD) into the polyurethane backbone via step growth polymerization. FTIR, ¹H NMR, ultraviolet-visible (UV-vis) spectroscopy were used to characterize BHAD and BPUs. Compared with BHAD, BPUs showed hypochromic change in UV-visible spectroscopy. The obtained BPUs have good thermal dye migration. The effect of BHAD content on BPUs’ emulsion stability, water resistance, mechanical properties, and thermal performance were investigated systematically by particle size analysis, water absorption ratio, tensile strength test, and thermogravimetric analysis.

Keywords:

• 1,4-bis(2-hydroxyethylamino)anthracene-9,10-dione (BHAD)
• blue waterborne polyurethanes
• diol colorant
• extender

Acknowledgments

Financial support from the National Natural Science Foundation of China (No. 51073144) is acknowledged.

Notes

^a W = the weight of BAHD/the weight of polyurethane resin *100%.

^a W = the weight of BAHD/the weight of polyurethane resin *100%.