| 耐水和低游离甲醛脲醛树脂的合成与改性 |
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| 引用本文： | 刘慧,邱伟,吴昊,王洪.耐水和低游离甲醛脲醛树脂的合成与改性[J].绵阳师范学院学报,2010,29(11). |
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| 作者姓名： | 刘慧 邱伟 吴昊 王洪 |
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| 作者单位： | 绵阳师范学院化学与化学工程学院; |
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| 摘 要： | 为寻求合适的工艺条件以提高脲醛树脂胶粘剂的综合性能,采用了降低甲醛/尿素物质的量比、改进合成工艺、加入改性剂等3种途径优化了脲醛树脂的合成方法.实验结果表明:以甲醛和尿素为单体,添加适量的聚乙烯醇和三聚氰胺改性剂,甲醛和尿素最佳物质的量比约为1.5:1,尿素分3次(11.4 g、0.5 g、0.2 g)投料,反应温度控制在(35℃-85℃),反应时间约60min,用聚乙烯醇和三聚氰胺进行改性,可制得综合性能较好的低毒耐水脲醛树脂胶粘剂.产品质量达到国家相关规定指标.
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| 关 键 词： | 三聚氰胺 聚乙烯醇 脲醛树脂(UF) 游离甲醛 耐沸水性 改性 |
Synthesis and Modification of Low Content and Water Proof Urea Formaldehyde Resin |
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| LIU Hui,QIU Wei,WU Hao,WANG Hong.Synthesis and Modification of Low Content and Water Proof Urea Formaldehyde Resin[J].Journal of Mianyang Normal University,2010,29(11). |
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| Authors: | LIU Hui QIU Wei WU Hao WANG Hong |
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| Institution: | LIU Hui,QIU Wei,WU Hao,WANG Hong(School of Chemistry and Chemical Engineering,Mianyang Normal University,Mianyang,Sichuan,621000) |
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| Abstract: | Urea formaldehyde resin(UF) with improved properties has been prepared.To find proper reaction conditions,the research employs three optimizing measures: decreasing the molar ratio of formaldehyde to urea,modifying synthesis methods and adding modified reagent.The result shows that a low-toxicity,water-resisting urea-formaldehyde resin with good performances has been obtained by adding PVA or melamine to achieve a molar ratio of formaldehyde to urea of 1.5:1 and adding urea in three stages.The optimized rea... |
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| Keywords: | melamine vinol urea-formaldehyde(UF) resin free formaldehyde boiling-water resistance modification |
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