| 高固含量水性聚氨酯分散体的合成 |
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| 引用本文： | 瞿金清,陈焕钦.高固含量水性聚氨酯分散体的合成[J].化工学报,2003,54(6):868-871. |
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| 作者姓名： | 瞿金清 陈焕钦 |
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| 作者单位： | 华南理工大学化学工程研究所 |
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| 摘 要： | 引 言水性聚氨酯是水溶型、水分散型和水乳化型聚氨酯的统称 .水性聚氨酯与溶剂型相比较 ,具有生产、运输和使用安全 ,不污染环境的优点 ,在涂料、黏合剂和皮革涂饰剂等方面的应用备受重视1] ,成为近 10年来全世界的研究热点 .水性聚氨酯的弱点是其制成的涂料和涂饰剂的机械性能、耐水性不如溶剂型聚氨酯 .克服这些弱点 ,是近年来各国研究者努力的方向2 ] .在改善水性聚氨酯性能方面有大量研究报道 ,诸如降低亲水基团含量 ,增大乳液粒径 ,采用强力机械分散增加乳液贮存稳定性 ,改善乳液对涂膜基材表面的润湿性、黏附力等等3] .但很少见…
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| 关 键 词： | 水性聚氨酯 合成 性能 |
| 文章编号： | 0438-1157(2003)06-0868-04 |
| 收稿时间： | 2002-1-9 |
| 修稿时间： | 2002年1月9日 |
SYNTHESES OF HIGH SOLID CONTENT WATERBORNE POLYURETHANE DISPERSION |
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| QU Jinqing,CHEN Huanqin.SYNTHESES OF HIGH SOLID CONTENT WATERBORNE POLYURETHANE DISPERSION[J].Journal of Chemical Industry and Engineering(China),2003,54(6):868-871. |
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| Authors: | QU Jinqing CHEN Huanqin |
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| Abstract: | A series of waterborne polyurethane (WPU) dispersions were synthesized from isophorone diisocyanate (IPDI), polyester glycol (T 1136) and dimethylolpropionic acid (DMPA) via prepolymer mixture. It was found that the solid content, hydrolytic stability of PU emulsion and the cold crack properties of the cast film of WPU could be improved by using polyester and polyether as soft segment. The mechanical properties of the cast film increased and the elongation at break decreased with increasing content of hard segment and NCO/OH ratio. The water resistance, solvent resistance and wetting rub properties of the cast film of WPU would be improved by increasing the amount of TMP. Testing of the cast film showed natural gloss with silky hand feel, excellent adhesion and cold crack properties, water resistance, solvent resistance, and rub resistance at 40% hard segment content, 1.3-1.5 of NCO/OH ratio and 3%-5% of TMP content. |
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| Keywords: | waterborne polyurethane synthesis properties |
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