磺化三聚氰胺-水杨酸-甲醛树脂高效减水剂的研制

发布时间：2018-03-25 23:38

  本文选题：高效减水剂　切入点：三聚氰胺　出处：《中国胶粘剂》2015年12期

【摘要】：以三聚氰胺(M)、水杨酸(SA)和甲醛(F)为原料,亚硫酸氢钠(SB)为磺化剂,采用四步合成法制备了SMSAF(磺化三聚氰胺-水杨酸-甲醛树脂)高效减水剂。系统探讨了合成工艺条件对SMSAF减水剂分散性的影响。研究结果表明:当n(M)∶n(SA)∶n(F)∶n(SB)=1∶0.1∶3.9∶1.3,羟甲基化阶段的反应温度为70℃、反应时间为1 h和p H为8.5,磺化阶段的反应温度为85℃、反应时间为3 h和p H为12,酸性缩聚阶段的反应温度为60℃、反应时间为1 h和p H为4,碱性重整阶段的反应温度为85℃、反应时间为1 h和p H为8.5时,合成的SMSAF减水剂综合性能良好;当w(SMSAF)=1.0%(相对于水泥质量而言)时,混凝土体系具有良好的分散性,水泥净浆初始流动度(达249 mm)相对最大。
[Abstract]:In this paper, melamine (M), salicylate (SA) and formaldehyde (F) were used as raw materials and sodium bisulfite (SBSO) as sulfonating agent. SMSAF (sulfonated melamine salicylic acid-formaldehyde resin) superplasticizer was prepared by a four step synthesis method. The effects of synthetic conditions on the dispersity of SMSAF water reducer were systematically discussed. The results show that the hydroxy methylation order of SMSAF is as follows: 1: 1: 0.1: 3. 9: 1.3. The reaction temperature is 70 鈩，

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