Paper

Authors:: Xiaoxuan Liu; Lunyong Duan; Yingyin Chen; Jiahui Su; Yuanpei Li
Abstract: In this paper, a novel waterborne UV-curing polyurethane acrylate (UV-WPUA) was prepared from toluene diisocyanate (TDI). The polyurethane acrylate resin has been synthesized by the serial steps synthetic method. The content of carboxyl group (-COOH), and molecular weight of Polyethylene glycol (PEG) and the content of unsaturated double bonds (-CH=CH2) were optimized by the orthogonal experiment. The reaction conditions, such as order of reagent addition, neutralization agent, type of inhibitor and its water-solubility, were investigated. The resulting resin had excellent performance when the content of carboxyl group (–COOH) was 3.0 wt.%, the content of unsaturated double bonds (-CH=CH2) was 3.0 wt.%, and molecular weight of PEG was 600. The influences of initiator content, dry time, dry temperature on UV-curing rate were discussed. The bulk performance of the resin was characterized. Flexibility, adhesion, and clarity of the UV-curing coating were excellent. The UV-curing coating of aromatic resin was successfully applied to the packaging of paper such as wine bottle label, plating-aluminum card, and cigarette case.
Keywords: UV-curing Technique; UV-curable Waterborne Aromatic Polyurethane Acrylate; Packaging of Paper; Coating Formulation; Orthogonal Experiment
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