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A photochromic waterborne polyurethane-based dye with azobenzene groups WPU-DDB-3BF was prepared by incorporating Disperse Diazo Black 3BF (DDB-3BF, CAS: 6232-57-1) into the polyurethane chain according to a modified acetone process. The expected structure of WPU-DDB-3BF was characterized by FT-IR, Raman and UV–Vis spectra. Containing the well-known dye of azobenzene groups, WPU-DDB-3BF exhibits a...
A waterborne polyurethane–acrylic hybrid polymeric dye was prepared depending on soap-free emulsion polymerization method. The resulting polymeric dye composed of methyl methacrylate (MMA) monomer which was polymerized into polymethyl methacrylate (PMMA) as cores and waterborne polyurethane-based dye was synthesized by anchoring dye monomers (6-amino-2-cyclohexyl-benz[de]isoquinone-1,3-dione) to polyurethane...
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