Developing a new class of UV-curable polyurethane acrylate resins for coating applications

P OLYESTER (PET) fabrics that containing nitrogen can be considered as a potential material for multipurpose applications.For this purpose, primary attention is given to introduce nitrogen-containing functional group onto the surface of PET fabrics using synthesized UVcurable polyurethane acrylate built-in amine.Moreover, the effect of incorporation the amino groups on the printing behavior of polyester fabric was evaluated.Polyurethane acrylate built-in amine resins were prepared either by one-shot sonochemical polymerization or by using conventional thermal synthesis procedure.Then, UV-curable coatings were prepared by mixing the prepared polyurethane acrylate built-in amine resin with the main components of UV curable coatings such as monomer as a diluent and 2-Hydroxy-4`-(2-hydroxyethoxy)-2-methylpropiophenone as photo-initiator.The prepared built-in amine photopolymers were characterized by (H 1 -NMR), (FTIR), and (GPC).The morphology of the cured coating was also examined by using scanning electron microscopy (SEM).In addition, fastness properties of the printed fabrics and color strength were carried out to assess the effectiveness of the incorporation of the nitrogen groups on the stability of the coating layer.The results showed that, the IR Spectra of vinyl terminated PU polymers has a characteristic peak of N-H stretching at 3326 cm -1 accredited to the formation of urethane bond.It was also found that treatment of PET fabric with polyurethane acrylates resin containing built-in amine results in an increase in the affinity to acid dyes.The current work opens up a novel opportunity to develop nitrogencontaining PET fabrics.