色粉纸用自交联丙烯酸树脂乳液的合成及性能

Synthesis and properties of self-crosslinking acrylic resin emulsion for toner paper

摘要:

根据色粉纸表面固砂的性能要求，以丙烯酸丁酯(BA)、甲基丙烯酸异辛酯(EHMA)为软单体、丙烯酸甲酯(MA)、甲基丙烯酸甲酯(MMA)为硬单体，丙烯酸羟基丙酯(HPA)为交联单体，甲基丙烯酸(MAA)、甲基丙烯酸缩水甘油酯(GMA)作为功能单体，采用半连续种子乳液聚合法，制备了具有核壳结构的水性丙烯酸酯树脂乳液(WSAE-G)，用作色粉纸表面固砂用粘合剂和成膜剂。讨论了GMA用量对乳液粒径、稳定性、粘度等的影响。使用傅里叶红外光谱(FT-IR)及热失重分析仪(TSC)对聚合物结构进行分析，利用动态光散射仪(DLS)和透射电镜(TEM)对乳液乳胶粒子的大小及形貌进行了表征，采用万能材料试验机对胶膜的力学性能进行测试，对固砂产品表面进行扫描电镜(SEM)测试。结果表明：GMA用量为1 wt%时，乳液粒径为142.4 nm，PDI为0.063，乳液分散稳定指数TSI为0.162287稳定性较好，且TEM显示清晰核壳结构。同时对比未添加GMA胶膜的拉伸强度从5.518MPa增加为9.057MPa。作为色粉纸表面固砂剂应用后，色粉纸层间结合力为244.9 J/m2，乳液粘接强度大不易掉砂，SEM图观察所形成的固砂层较均匀，磨砂性较好，对色粉粒子吸附度高。

Abstract:

According to the performance requirements of sand-fixing on the surface of toner paper, butyl acrylate (BA) and isooctyl methacrylate (EHMA) are soft monomers, and methyl acrylate (MA) and methyl methacrylate (MMA) are hard The monomer, hydroxypropyl acrylate (HPA) is a crosslinking monomer, and methacrylic acid (MAA) and glycidyl methacrylate (GMA) are functional monomers. A semi-continuous seed emulsion polymerization method was used to prepare an aqueous acrylic resin emulsion (WSAE-G) with a core-shell structure. Use it as a binder and film-forming agent for sand-fixing on the surface of toner paper. The effect of the amount of GMA on the particle size, stability and viscosity of the emulsion was discussed. The polymer structure was analyzed using Fourier infrared spectroscopy (FT-IR) and thermal weight loss analyzer (TSC). The size and morphology of emulsion latex particles were characterized by dynamic light scattering (DLS) and transmission electron microscopy (TEM). A universal material testing machine is used to test the mechanical properties of the film. Scanning electron microscopy (SEM) test was performed on the surface of sand-fixed products. The results show that when the amount of GMA is 1 wt%, the emulsion particle size is 142.4 nm, the PDI is 0.063, the emulsion dispersion stability index TSI is 0.162287, and the TEM shows a clear core-shell structure. At the same time, the tensile strength of the GMA film without addition increases from 5.518MPa to 9.057MPa. After being applied as a sand-fixing agent on the surface of toner paper, the binding force between the layers of the toner paper is 244.9 J/m2, the emulsion bonding strength is large, and it is not easy to fall off the sand. The SEM image shows that the formed sand-fixing layer is more uniform and has better matteness.