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环境友好型人造板用脲醛树脂胶粘剂合成研究

The study on friendly-environment urea-formaldehyde resin for wood-based panel

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【作者】 张跃叶涛刘建武严生虎沈介发

【Author】 Zhang Yue Ye Tao Liu Jianwu Yan Shenghu Shen Jiefa(The Research Institute of Fine Chemical Engineering,Jiangsu Polytechnic University,Changzhou 213164)

【机构】 江苏工业学院精细化工研究所

【摘要】 采用弱碱-弱酸-弱碱工艺,在传统一次加料反应的基础上,尿素与甲醛"分批加入,多点分段"控制反应过程,进行脲醛树脂游离甲醛含量减量化的实验。通过单因素实验,考察F/U摩尔比、羟甲基化温度、聚合反应温度、改性剂等对脲醛树脂胶粘剂游离甲醛含量和性能的影响。结果显示,当甲醛与尿素的摩尔比为1.3∶1,羟甲基化反应温度为95~98℃,聚合反应时间30min时,可以合成游离甲醛含量在0.05%以下的脲醛树脂胶粘剂,最终使由脲醛树脂胶粘剂制得人造板的性能技术指标达到E0级标准。

【Abstract】 The process of weak alkali-weak acid-weak alkali was used.In the base of the tradition technology of adding urea in one portion to synthesize urea-formaldehyde resin,urea and formaldehyde applied the method of the "added in batches,multi-point section",which was controlled to decrease the free formaldehyde of the ura-formaldehyde resin.Individual factor experiments were carried out,which studied the influence of the F/U molar ratio,the first temperature of adding urea,the polymerization reactivity temperature modifier and so on.The optimum condition was obtained: the F/U molar ratio was 1.3∶1,controlling adding urea temperature at 95~98℃,polymerization reactivity time for 30 minutes.The free formaldehyde of synthesized urea-formaldehyde resin was less than 0.05%.Finally,the resin could reach the national E0 level standard of resin used for wood-based panel.

  • 【文献出处】 化工新型材料 ,New Chemical Materials , 编辑部邮箱 ,2009年11期
  • 【分类号】TQ433.431
  • 【被引频次】8
  • 【下载频次】253
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