低游离醛高羟甲基水溶性酚醛树脂的制备  

Prepararion of Water-soluble Phenol-formaldehyde Resin Containing Low Free Formaldehyde Content and High Methylol Group Content

作　　者：罗翠锐[1] 翁凌[1] 吴化军 王凤春[1] 刘立柱[1] 

机构地区：[1]哈尔滨理工大学材料科学与工程学院,哈尔滨150040 [2]嘉兴市清河高力绝缘有限公司,浙江嘉兴314031

出　　处：《绝缘材料》2010年第2期5-8,共4页Insulating Materials

摘　　要：通过实验选取Ba(OH)2.8H2O为催化剂,用一次逐步加入甲醛的方法合成低游离醛、高羟甲基含量的水溶性酚醛树脂。采用正交试验分析了反应原料摩尔比、催化剂用量、反应时间、反应温度对合成的酚醛树脂游离醛和羟甲基含量的影响,确定的优选合成工艺为:甲醛与苯酚的摩尔比2∶1、反应温度85℃、反应时间120 min、催化剂用量4%,得到的酚醛树脂游离醛含量为1.40%,羟甲基含量为23.10%,固含量为41.6%,水混合性为3倍。A water-soluble phenol-formaldehyde resin with low free formaldehyde and high methylol content was synthesized with Ba（OH）2·8H2O as catalyst and in one process step.The effect of reactant molar ratio,the amount of catalyst,temperature and time of reaction on the indexes of content of free formaldehyde and methylol group was investigated by means of orthogonal experiment.The results show that with optimum conditions of reactant molar ratio 2.0,the amount of catalyst 4%,temperature 85 ℃,and time of reaction 120 min,the free content of free formaldehyde in prepared resin is 1.40% and the methylol group content is 23.10%.Under these conditions,the phenol-formaldehyde resin is synthesized with 41.6% of solid content and 3 times of water mixed.

关 键 词：水溶性酚醛树脂 正交试验 低游离醛 高羟甲基 

分 类 号：TM215.3[一般工业技术—材料科学与工程]