阳离子型水性聚氨酯的合成及工艺研究 |
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引用本文: | 方芳,张良均,沈珍慧,苗泽凯,杨啸. 阳离子型水性聚氨酯的合成及工艺研究[J]. 现代涂料与涂装, 2014, 0(5): 6-9 |
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作者姓名: | 方芳 张良均 沈珍慧 苗泽凯 杨啸 |
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作者单位: | 武汉工程大学绿色化工过程省部共建教育部重点实验室,湖北省新型反应器与绿色化学工艺重点实验室,武汉430073 |
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摘 要: | 以甲苯-2,4-二异氰酸酯(TDI),聚四氢呋喃醚二醇(PTMG)为主要原料,以1,4-丁烯二醇为小分子扩链剂,N-甲基二乙醇胺(MDEA)为亲水性扩链剂,用丙酮法制备了聚醚型阳离子水性聚氨酯乳液。研究了反应条件对乳液和胶膜性能的影响,结果表明,当预聚n(—NCO)/n(—OH)比为3.0、反应温度75~80℃、反应时间3 h,N-甲基二乙醇胺用量占树脂总量的6%~7%时乳液和胶膜性能最好,并通过红外图谱对胶膜进行了表征。
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关 键 词: | 阳离子型 水性聚氨酯 1,4-丁烯二醇 N-甲基二乙醇胺 |
Study on the Synthesis and Process of Cationic Waterborne Polyurethane |
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Affiliation: | FANG Fang, ZHANG Liang-jun, SHEN Zhen-hui, MIAO Ze-kai, YA NG Xiao ( Key Laboratory tor Creen Chemical Process of Ministry of Education, Wuhan Institute of Teehnology, Hubei Novel Reactor and Green Chemical Technology Key Laburatory Wuhan 430073.China ) |
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Abstract: | The cationic waterborne polyurethane was synthesized by means of acetone process and using toluene-2, 4-diisocyanate (TDI), polytetrahydrofuran glycol (PTMG) as main raw materials, 2-butene-1, 4-diol as small molecule ehain extender, N-methyl diethanolamine (MDEA) as hydrophilic chain- extender. The influence factors sucb as reaction process conditions for synthesizing waterborne poly urethane were discussed. The results showed that the optimum conditions of the reaction were as follows: the ratio of n(-NCO)/n(-OH) was 3:1, the reaction temperature for preparing prepolymer was 75- 80℃ and reaction lime was 3 hours, the mass fraction of MDEA was 6%-7%. The cationic waterborne polyurethane obtained had the best storage stability and comprehensive performance, and its film was characterized by FI-TR. |
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Keywords: | cationic waterborne polyurethane 2-butene-1,4-dioll N-methyl diethanolamine |
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