【摘要】 采用Ｌ９（３４）正交试验，研究了影响脲醛树脂合成的因素；通过对试验结果的分析找出了合成脲醛树脂的最佳条件：反应温度５５ ℃，反应时间１．５ ｈ，ｐＨ值８．５，ｎＦ／ｎＵ 值１．７５．更多还原

【Abstract】 By using the othogonal test of L9(3 4), the thesis has studied the factors affecting the synthesis of ureaformaldehyde resin, systematically analyzed the test results and finally found out the optimum for synthesis ureaformaldehyde resin: reaction temperature 55℃, reaction time 1.5 h, pH value 8.5 and n F/n U value 1.75.更多还原