Study On Synthesis And Application Of Tender UV-curing Material

The research conditions and development trend of UV materials were reviewed and analyzed in this paper. The tender UV materials was brought forward and studied in UV leather based varnish and VU printing ink. Three kinds of tender UV-curing prepolymers were prepared. They are UV-curing polyurethane acrylate (PUA), soft UV-curing Epoxy acrylic resin (PEA) and UV-curing multiacrylate polyurethane acrylate (BPUA). The structures of these prepolymers were characterized by Fourier transform infrared (FTIR) spectra. Some influencing factors such as operation fashion, reaction temperature and catalyst on synthetic reactions were studied. Through some repeated experiment, the optimum conditions of synthetic reactions were got. As the tender part of polymer molecule, the poly (propylene glycol) (PPG) was studied. The result suggested that prepolymer which was prepared with the PPG (molecular weight is 1000) has good capability. It's UV-curing velocity is 35m/min, glossiness is 139.3%, tensibility is 23.88% and tensile strength is 4.475Mpa. Butyl acrylate was selected as the tender monomer in prepared BPUA, and when the viscosity of middle multipolymer is 800-1000mPa.s ,the last prepolymer had good capability.In the applied research, some influencing factors such as diluent, photoinitiator and photoinitiators that match to different pigments on the coating film were studied. Leather based varnish was prepared with self-prepared prepolymer. The capability testing suggested that glossiness is >110%,resistance to cracking is > 30000 times, resistance to acetone is >200 times and adhesion is well. In the study of UV printing ink suggested that when the PEA/BPUA(wt) is 3/1-4/1, the coating film had good capability: adhesion is well, glossiness is >110% and tenderness is 1mm. Self-prepared paper varnish with excellent comprehensive properties, adhesion is well, glossiness is >110% and resistance to acetone is >200 times. Self-prepared UV printing ink adhesion is well, glossiness is >80%, tenderness is 1mm and resistance to acetone is >200 times, and through aging testing, the coating film didn't become brittle.