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摘要：丙烯酸酯乳液属于热塑性树脂，成膜温度高、低温涂膜较脆且柔韧性差，常温自交联技术是改善丙烯酸酯乳液成膜性能研究的一大热点。水性聚氨酯具有柔韧性好、不燃、耐腐、耐候、良好的粘接性能等优点，但大多数水性聚氨酯涂膜耐水性、耐溶剂性等性能偏差，限制了其应用范围。本论文通过对水性含氟聚氨酯丙烯酸酯乳液的制备、表征和性能分析研究了聚氨酯丙烯酸酯所占比例和含氟量的大小对乳液的影响。研究表明，聚氨酯与丙烯酸比例为75：25时性能较好；含氟量为5%~15%时性能较好。6528
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关键词：水性树脂；含氟聚氨酯；性能；耐水性；耐酸碱性；固含量
Preparation for Waterborne Fluorinated Polyurethane-Acrylate Emulsions
Abstract: Acrylic emulsion is thermoplastic resin, film-forming coating more crisp and high temperature, low temperature flexibility, and room temperature self-cross linking technology study on improving properties of acrylic emulsion film is one of the hot spots. Waterborne polyurethane with good flexibility, non-combustible, corrosion-resistant, weather resistant, good adhesion properties and so on, but most of the waterborne polyurethane coating water resistance, solvent resistance and other performance deviations, limits the scope of its application. The ratio of polyurethane and acrylic and the effects of fluorine content on emulsion were studied in the paper by the preparation, characterization and performance analysis of waterborne fluorinated polyurethane-acrylate emulsions. The research results showed that polyurethane and acrylic have better performance when compared to 75:25; when the fluorine content is 5% and 15%, the performance is better.
Keywords: Waterborne resins; fluorinated polyurethane; performance; water resistance; acid and alkaline resistance; solid content
目 录
1绪论 1
1.1水性聚氨酯的概述 1
1.2丙烯酸酯的概述 2
1.3水性聚氨酯丙烯酸酯的概述 3
1.4水性含氟聚氨酯丙烯酸酯乳液的概述 4
1.5研究意义及目的 4
2试验 5
2.1原料名称、规格和来源 5
2.2仪器设备 5
2.3聚氨酯丙烯酸酯乳液制备方法简介 6
2.4聚氨酯丙烯酸酯乳液的合成 7
2.4.1 水性聚氨酯乳液的合成 7
2.4.2水性聚氨酯丙烯酸酯的合成 7
2.5水性含氟聚氨酯丙烯酸酯乳液的制备配方 8
2.6聚氨酯丙烯酸酯乳液的制备 9
2.6.1 PU乳液的制备 9
2.6.2 PUA乳液的制备 9
2.7乳胶膜测试方法 10
2.7.1乳液外观 10
2.7.2固含量的测量 10
2.7.3乳液稳定性测试 10
2.7.4粒径及粒径分布测试 10
2.7.5胶膜吸水率测试 11
2.7.6胶膜的耐水性测试 11
2.7.8红外光谱 11
3结果与讨论 12
3.1乳液外观 12
3.2固含量的测量 12
3.3乳液稳定性测试 13
3.4粒径及粒径分布测试 13
3.5胶膜吸水率测试 17
3.6胶膜的耐水性测试 18
3.7红外光谱 18
4结论 22
致谢 23
参考文献 24
附录一：成膜物图片 26
1绪论
含氟丙烯酸酯改性水性聚氨酯，同时兼具了有机氟和丙烯酸酯双重优势，受到了广泛的关注。目前，国内外都在争相研究含氟丙烯酸酯改性聚氨酯乳液的合成工艺﹑测试手段和性能 。