论文总字数：16425字

摘 要

本工作运用的是半连续乳液聚合工艺，首先利用苯乙烯，甲基丙烯酸甲酯和丙烯酸丁脂为聚合反应单体，加入OP-10乳化剂，引发剂过硫酸铵以及十二烷基硫酸钠制备了苯丙乳液，然后在苯丙乳液中加入一定量的钛白粉和滑石粉作为填充剂，同时加入2%纤维素增稠剂与10%多聚磷酸盐分散剂，辅以丙二醇、乙二醇、防霉剂、消泡剂作为功能基液制备了丙烯酸酯类水性建筑外墙涂料。论文研究了软硬单体配比对成膜性能的影响,反应温度对乳液含固量和耐水性能的影响, 引发剂滴加速度对乳液性能的影响以及乳液聚合反应时长对乳液的储藏稳定性的影响。确定了成膜最佳的软硬单体配比，反应的最佳温度，引发剂最优的滴加速度，以及储藏稳定性所需的乳液最佳的反应聚合时长。

结果表明: 当硬：软单体用量比例为1:1.2时，成膜性能和拉伸度最佳。乳液聚合最适宜温度为80℃，最佳的引发剂滴加时间是120min以上，在这个温度和引发剂滴加时间下乳液的含固量、粘度和耐水性能达到最佳，乳液聚合趋向于完全。当乳液聚合实验反应时长控制在180min及以上时，乳液储藏稳定性达到最优。

关键词：丙烯酸酯乳液、乳液聚合、水性涂料

The Preparation of Acrylic Ester Waterborne Exterior Wall Coatings

Abstract

This work is a semi-continuous emulsion polymerization process, initiator ammonium persulfate and sodium dodecyl sulfate A styrene-acrylic emulsion was prepared by adding a certain amount of titanium dioxide and talc as a filler in the styrene-acrylic emulsion while adding 2% cellulose thickener and 10% polyphosphate dispersant, supplemented with propylene glycol, ethylene glycol , Antifungal agent, defoamer as the functional base of the preparation of acrylic water-based architectural exterior paint. The effects of the ratio of soft and hard monomer on the film forming performance, the effect of reaction temperature on the solid content and water resistance of the emulsion and the influence of the emulsion polymerization time on the storage stability of the emulsion were studied. The optimum reaction temperature is determined by optimizing the optimum temperature, the optimal temperature for the reaction, and the optimal storage stability of the emulsion.

The results show that when the ratio of hard: soft monomer is 1: 1.2, the film forming performance and the elongation are the best. At this temperature, the solid content, viscosity and water resistance of the emulsion are optimized, and the emulsion polymerization tends to be complete. When the reaction time of emulsion polymerization was controlled at 180min and above, the stability of emulsion storage was the best.

Key words: Acrylic emulsion, emulsion polymerization, waterborne coating

目录

摘要 I

Abstract II

第一章 综述 1

1.1 前言 1

1.2涂料 1

1.2.1涂料的成膜机理 1

1.2.2涂料中颜料的应用 2

1.2.3涂料的溶剂和添加剂 2

1.3涂料的分类 2

1.3.1粉末型涂料 2

1.3.2高固体分涂料 3

1.3.3水性涂料 3

1.4水性丙烯酸涂料 4

1.4.1纯丙乳液与苯丙乳液的区别与特点 4

1.4.2水性丙烯酸涂料的应用 4

1.5水性丙烯酸酯类建筑外墙涂料 5

1.5.1水性丙烯酸酯类外墙漆的现状及发展 5

1.5.2水性丙烯酸酯类外墙漆制备 6

第二章 实验部分 7

2.1 实验材料与仪器 7

2.1.1 实验材料 7

2.1.2 仪器与设备 8

2.2 实验方法 8

2.2.1 丙烯酸脂乳液合成 8

2.2.2新型白色丙烯酸酯类水性外墙涂料制备 9

2.3检测方法 9

2.3.1涂料的成膜性能测试 9

2.3.2涂料的储藏稳定性能测试 9

2.3.3乳液含固量的测定 10

2.3.4乳液的耐水性测定 10

2.3.5乳液的冻融稳定性测试 10

2.3.6乳液的粘度性能测试 10

第三章 结果与分析 11

3.1软硬单体配比对成膜性能的影响 11

3.2反应温度对含固量和耐水性能的影响 13

3.3引发剂滴加速度对乳液性能的影响 13

3.4反应时长对乳液的储藏稳定性的影响 14

第四章结论与展望 15

4.1结论 15

4.2展望 15

参考文献 16

致谢 19

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