| 水性环氧树脂乳化型固化剂固化特性研究 |
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| 引用本文： | 秦卫,舒武炳,明杜.水性环氧树脂乳化型固化剂固化特性研究[J].中国胶粘剂,2011,20(2). |
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| 作者姓名： | 秦卫 舒武炳 明杜 |
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| 作者单位： | 西北工业大学理学院应用化学系,陕西,西安,710129 |
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| 摘 要： | 在多元胺中引入环氧树脂(EP),再通过成盐反应,合成出含仲胺盐结构、可乳化液体EP的固化剂;然后采用相反转法制备出稳定的水性EP乳液。结果表明:该固化剂在室温时具有一定的潜伏性(水性EP乳液室温储存期超过14 d),而在较高温度时具有快速固化的特点。仲胺盐的起始分解温度(Ti)约为113℃,当固化温度较低时,仲胺盐热分解反应难以进行,封闭的仲胺基与环氧基的固化反应难以发生,表现为成盐率越高,乳液凝胶时间越长;当固化温度>Ti时,仲胺盐快速热分解后释放出被封闭的活性仲胺基,乳液可快速固化,成盐率对乳液凝胶时间的影响不大。各固化膜均具有较低的吸水率(<3.1%),其耐水性和耐丙酮性能优良,但耐强酸、强碱性能较差且随固化剂成盐率提高而下降。
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| 关 键 词： | 环氧树脂 固化剂 固化性能 凝胶时间 |
Study on curing characteristic of emulsified curing agent for waterborne epoxy resin |
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| QIN Wei,SHU Wu-bing,MING Du.Study on curing characteristic of emulsified curing agent for waterborne epoxy resin[J].China Adhesives,2011,20(2). |
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| Authors: | QIN Wei SHU Wu-bing MING Du |
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| Affiliation: | QIN Wei,SHU Wu-bing,MING Du(Department of Applied Chemistry,College of Science,Northwestern Polytechnical University,Xi'an 710129,China) |
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| Abstract: | A novel emulsified curing agent with secondary amine salt structure for liquid epoxy resin(EP) was synthesized by salt-forming reaction when EP was introduced into polyamine.Then a steady EP aqueous emulsion was prepared by phase inversion.The results showed that the curing agent had both latent characteristic at room temperature(namely storage time at room temperature above 14 d for EP aqueous emulsion) and fast-curing characteristic at higher temperature.The initiation decomposition temperature(Ti) of the... |
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| Keywords: | epoxy resin curing agent curing characteristic gelling time |
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