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以异佛尔酮二异氰酸酯(IPDI)、聚己二酸丁二醇酯(PBA)、聚氧化丙烯二醇(PPG)、聚四氢呋喃二醇(PTMG)、二羟甲基丁酸(DMBA)和甲基丙烯酸-β-羟乙酯(HEMA)等为主要原料,合成了卡基材料用阴离子型WPU(水性聚氨酯)覆膜胶。研究结果表明:采用单因素试验法优选出制备WPU覆膜胶的最优配方是初始R=n(-NCO)/n(-OH)=4、m(PPG):m(PTMG):m(PBA)=10:20:70、w(DMBA)=5.5%和w(HEMA)=4.5%(相对于预聚体用原料总质量而言),此时活泼的-NCO基已被封闭,羟基丙烯酸酯已成功引入到WPU大分子链中;与普通WPU覆膜胶相比,由最优配方制成的WPU覆膜胶的固含量(41%)较高、剥离强度较大且稳定性较佳,将其应用于卡基材料中,可得到高剥离强度和高耐湿热老化性能的覆膜色卡。
(IPDI), polybutylene adipate (PBA), polyoxypropylene diol (PPG), polytetrahydrofuran diol (PTMG), dimethylolbutyric acid (DMBA) and Β-hydroxyethyl methacrylate (HEMA) as the main raw material, synthesis of the card-based materials with anionic WPU (water-based polyurethane) plastic film. The results show that the optimum formula of WPU film adhesive prepared by single factor experiment is as follows: initial R = n (-NCO) / n (-OH) = 4, m (PPG): m (PTMG) PBA = 10:20:70, w (DMBA) = 5.5% and w (HEMA) = 4.5% with respect to the total mass of the prepolymer starting material, when the active -NCO group has been blocked and the hydroxyl Acrylate has been successfully introduced into the WPU macromolecular chain. Compared with the ordinary WPU coated adhesive, the WPU coated adhesive prepared by the optimal formula has a higher solid content (41%), a larger peel strength and a higher stability Good, its application to the card-based materials, can be high peel strength and high humidity heat aging properties of the coating color card.