环氧改性水性丙烯酸树脂的合成研究.doc

环氧改性水性丙烯酸树脂的合成研究

　　　 
　　　摘 要：
　　　环氧树脂改性水性丙烯酸树脂是目前水性丙烯酸树脂领域的研究热点，论文研究了环氧改性丙烯酸乳液合成的配方及工艺条件；以甲基丙烯酸甲酯、苯乙烯、丙烯酸酯等为单体,过氧化苯甲酰为引发剂,环氧树脂为改性剂,经聚合得到热固性环氧改性丙烯酸树脂。
　　　水性丙烯酸树脂具有较好的光泽度、耐候性、耐化学品性和稳定性高,且无污染、无毒性、无刺激性和生产安全、价格便宜等优点,是一种低VOC的绿色环保型产品,也是目前较为活跃的研究和开发领域。但常规丙烯酸醋树脂存在如成膜温度高、胶膜硬度低、抗回粘性差、耐水性不好、附着力差等缺点。因此,合成能克服以上缺陷的新型树脂己成为当前的研究热点。
　　　本研究先用溶液聚合的方法初步探讨合成了水溶性的丙烯酸酷树脂,然后用硬度高、附着力好、抗水性好及耐化学药品优良的环氧丙烯酸酷(EA)对其进行改性,有效的改善了水性丙烯酸酷树脂的缺点,提高了丙烯酸酯树脂的综合性能。
　　　采用中等相对分子质量环氧树脂与聚醚反应， 合成了非离子环氧树脂乳化剂， 再结合相反转技术,制备水性环氧树脂乳液。讨论了乳化剂的用量对乳液粒径和稳定性的影响; 研究了乳化剂、环氧固化剂用量与涂膜吸水率、凝胶含量、 机械性能之间的关系。
　　　关键词：环氧改性；丙烯酸；合成；应用

Study on synthesis of waterborne acrylic resin modified by epoxy resin
　　　Abstract:
　　　Synthesis of slow/controlled-release fertilizers is one of the most active fields in fertilizer industry, This paper studied the formula and synthetic conditions of epoxy modified acryliclatex; synthesized styrene-acrylic emulsion; Using benzoyl peroxide as an initiator, andwith the epoxy resin as amondifier and methyl methacrylate was copolymerized with styrene and acrylate etc. to form the heat-cured epoxy mondified acrylic resin. The synthesis process of epoxy mondified acrylic resin was decribed and its influencing factors were discussed in this paper.
　　　Waterborne Acrylate resin has some advantages, such as good glossiness,weather-resistant, chemical resistance, stabilization, non-contamination,nontoxicity, non-skin irritation, low price and safety of production, andbecome an green environ-mental product of low VOC. So it will be anattractive research and application areas. But it also has some disadvantages,such as high film forming temperature, low hardness,, poor anti一after tack,poor water-resistant, low adhesion, etc. So the high performance acrylatepolymer resin which can overcome those disadvantages will become research hotspot at present.
　　　In this paper, the water-souble Acrylate resin could besolution polymerization with Acrylate monomers, and makeprepared bypreliminarydiscussion on synthesis techniques. And then,  in order to improve thedisadvantages and enhance synthetic properties of copolymer,  Epoxyacrylate resin which has high hardness, adhesion, good water-resistant could be used for modifying it.
　　　Nonionic waterborne epoxy emulsifier was prepared by reaction between polyether and epoxy resin with medium molecular weight , which is used to prepare  the epoxy resin E一 2 0 emulsion by phase inversion technique . The effect of  amount of the emulsifier on the particle size and stability of epoxy resin emulsions were studied .The relationship between amount of the emulsifier ,A B一 H G F epoxy curing agent and water absorption ,gel content and mechanical  performance of the film were studied also.
　　　
　　　Key words: epoxy-modified, acid, synthesis, application

目 录

序 言…………………………………………………………………………………………

第1 章 综述……………………………………………………………………………
1.1 国内外水性工业涂料的应用概况………………………………………………
1.2 水性丙烯酸树脂……………………………………………………………………
1.3 环氧树脂水性化……………………………………………………………………
1.4 丙烯酸树脂的改性方法……………………………………………………………
1.5 环氧改性………………………………………………………………………………
1.5.1 环氧树脂的性质…………………………………………………………………
1.5.2水性环氧树脂的性质…………………………………………………………………
1.5.3 接枝共聚反应机理…………………………………………………………………
1.5.4环氧树脂的种类………………………………………………………………………

第2章 实验部分…………………………………………………………………
2.1引言………………………………………………………………………………
2.2实验试剂与仪器……………………………………………………………………
2.3 环氧改性丙烯酸树脂的基本配方………………………………………………
2.4环氧改性丙烯酸树脂的合成工艺………………………………………………
2.5 结果与讨论…………………………………………………………………………
2.5.1 酸值对性能的影响………………………………………………………………
2.5.2 环氧树脂种类的影响 ……………………………………………………………
2.5.3 环氧树脂添加量的影响 …………………………………………………………
2.5.4环氧树脂加料工艺对性能的影响……………………………………………………
2.5.5反应温度和时间的影响………………………………………………………………
2.5.6 pH值的影响 …………………………………………………………………………

第 3 章 结 论………………………………………………………………………

参考文献……………………………………………………………………………………
致 谢 ………………………………………………………………………………………