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本体聚合法合成固体聚羧酸减水剂的制备工艺与
作者：张智达，王丽秀，周普玉
（山西佳维新材料股份有限公司，山西 运城 044200）
摘要：以异戊烯醇聚氧乙烯醚和不饱和单体丙烯酸为主要原料，采用本体聚合法合成了一种固态聚羧酸减水剂。研究了引发剂用量，链转移剂用量，酸醚比及反应温度对减水剂分散性能的影响。结果表明，当反应温度为70 ℃，引发剂用量为单体总质量的0.5%，链转移剂用量为单体总质量的0.50%，酸醚比为3.6，滴加时间为2 h时，合成的固体聚羧酸减水剂分散性和坍落度保持性最佳。
关键词：本体聚合；固体聚羧酸减水剂；油溶性引发剂；分散性；保坍性
中图分类号：TU528.042+.2 文献标识码：A 文章编号：1001-702X（2018）12-0069-03
Research on the preparation and properties of a solid polycarboxylate superplasticizer synthesized by bulk polymerization method
ZHANG Zhida，WANG Lixiu，ZHOU Puyu
（Shanxi Jiawei New Materials Co. Ltd.，Yuncheng 044200，China）
Absrtact：In this paper，with isopentenol polyoxyethylene ether and unsaturated acrylic acid as the main raw materials，solid polycarboxylate superplasticizers were synthesized by the bulk polymerization method. The effects of the dosages of initiator，chain transfer agent，the ratio of acid to ether and the drop-time on the dispersion properties of the polycarboxylate superplasticiers were investigated. The experimental results show that the solid polycarboxylate superplasticizers，under the optimum polymerization conditions as the reaction temperature was 70 ℃，the dosages of initiator and the chain transfer agent were 0.5% and 0.50%，both based on the mass of the monomer，the ratio of acid to ether was 3.6∶1，and the drop-time was 2 h showed excellent dispersion and slump-maintaining.
Key words：bulk polymerization，solid polycarboxylate superplasticizer，oil soluble initiator，dispersity，slump-maintaining