摘要：水性丙烯酸树脂漆膜具有较好的光泽、可在不同气候中保持较长时间并且储存稳 定性好，且制造和施工过程无毒、不产生刺激性气味、不污染环境而且还具有安全性、 价格便宜等优点，是一种低 VOC 排放的绿色环保型产品，也是目前较为重视的研究 开发领域。但丙烯酸树脂对温度十分敏感而且漆膜耐水性和耐污性差。因此，对丙烯 酸改性去研究合成能克服丙烯酸树脂缺陷的新型树脂己成为当前的研究的关键。
有机硅聚合物具有优异的耐候性、耐污性和耐高低温性，漆膜高度疏水，且透气 性良好，被广泛应用在各个领域。若用机硅改性丙烯酸树脂，可使有机硅和丙烯酸树 脂的性能更加完善，这对丙烯酸树脂的工业发展具有重大的意义。本文用两种方法合 成了丙烯酸树脂并进行了有机硅改性。具体内容如下：
本文采取自由基聚合法制备树脂的预聚体，以丙烯酸类单体 MMA、BA 等为基 本反应单体，用偶氮二异丁腈(AIBN)作引发剂，再以二甲基乙醇胺中和盐化实现树脂 的水溶性，合成了具有较好耐水性的水性丙烯酸树脂。通过实验测试研究了单体配比， 溶剂类型对丙烯酸的影响。并用红外光谱对树脂结构进行了表征，热重分析仪对树脂 热稳定性进行了分析，实验表明，当用二甲苯作溶剂，单体比例在 1：1～1：1.5 之 间，引发及用量为 3%，反应温度为 82℃，反应时间为 5h 时，合成的树脂成膜性、 钙离子稳定性、耐蚀性较好。
然后用 KH550，KH560 进行有机硅改性，并合成树脂的对漆膜测试。实验表明： 用有机硅进行改性，有利于丙烯酸树脂漆膜耐水性、耐热性的提高。当引发剂用量为 3%，反应温度 82℃，搅拌速度 150r/min-200r/min, 有机硅用量为 6%，反应时间为 5 小时合成的有机硅改性丙烯酸酯树脂有较好的成膜性、防腐性、疏水性，大大改善了 水性丙烯酸树脂的缺点。
乳液聚合方法中引进了 OP-10，通过对乳液聚合合成的丙烯酸进行粒径分析、钙 离子稳定性分性、漆膜等分析，确定了乳液聚合体系的最佳用量与配比，结果得出: 采用预乳化―种子乳液聚合工艺，反应温度为 80℃、乳化剂用量为 3%，NaHCO3 用量为 0.3%，OP-10 与 SDBS 用量比为 2：1 时乳液粒径分布均匀，钙离子 稳定性最好，漆膜的性能最佳。
关键词：水性丙烯酸树脂有机硅改性溶液聚合乳液聚合
Abstract：Water-based acrylic paint film has a good gloss, can be kept in different climates for a long time and storage stability is good, and the manufacturing and construction process non-toxic, does not produce irritating odor, does not pollute the environment but also has security, Cheap and so on, is a low-VOC emissions of green products, is also more attention to the field of research and development. But the acrylic resin is very sensitive to temperature and poor water resistance and poor stain resistance. Therefore, the modification of acrylic acid to study the synthesis of new resin can overcome the defects of acrylic resin has become the key to the current research.
Silicone polymer has excellent weather resistance, stain resistance and high and low temperature resistance, the film is highly hydrophobic, and good ventilation, is widely used in various fields. If the use of silicone modified acrylic resin, silicone and acrylic resin can make the performance more perfect, which is the industrial development of acrylic resin is of great significance. In this paper, acrylic resin was synthesized and modified by two methods. The details are as follows:
In this paper, the prepolymer of the resin was prepared by free radical polymerization, and the monomer was prepared by using acrylic monomer MMA and BA as the basic reaction monomer, using azobisisobutyronitrile (AIBN) as initiator and neutralizing with dimethylethanolamine Salinity to achieve the water-soluble resin, synthetic water with good water resistance of synthetic acrylic resin. The effects of monomer ratio and solvent type on acrylic acid were studied by experimental test. The thermostability of the resin was characterized by infrared spectroscopy. The thermal stability of the resin was analyzed. 水性丙烯酸树脂的合成及改性研究:http://www.youerw.com/cailiao/lunwen_204717.html