新型改性脂肪族高效减水剂的合成与性能研究  

The synthesis of new modified sulfonated acetone-formaldehyde resin and its properties research

作　　者：刘冠男[1] 乔敏[1] 冉千平[1] 高南箫[1] 

机构地区：[1]江苏苏博特新材料股份有限公司,高性能土木工程材料国家重点实验室,江苏省建筑科学研究院有限公司,江苏南京211103

出　　处：《新型建筑材料》2016年第1期26-29,共4页New Building Materials

摘　　要：以有机磺化剂替代传统的亚硫酸钠/焦亚硫酸钠无机磺化体系,研制了一种新型的有机磺化脂肪族高效减水剂(OSAF)。OSAF具有减水性能好、着色性低的特点。考察了磺化剂用量等反应条件对减水剂分子质量和分散水泥浆体能力的影响,使用FT-IR表征了OSAF的结构。结果表明:磺化剂与丙酮投料摩尔比为0.6∶1.0,醛酮比为1.8∶1.0,催化剂质量浓度为1.2%和聚合浓度为39%时,制得的OSAF对水泥浆体的分散性能最佳。在不同水泥中的净浆流动度实验表明,OSAF具有良好的水泥适应性。当向水泥中加入蒙脱土时,使用OSAF作为减水剂的水泥净浆流动度受影响程度较小。A new kind of sulfonated acetone-formaldehyde resin （OSAF） was synthesized with organic sulfonating agent （OS） instead of sodium sulfite and sodium bisulfite. The color of this new sulfonated acetone-formaldehyde resin is relatively light and the disperse performance is excellent. The effect of sulfonating agent dosage and other reaction condition on the molecular mass of resin and disperse performance of cement has been investigated,and the structure of the resin molecule was characterized by FT- IR spectrum. The results show that optimal performance was achieved at the following condition：n（sulfonating agent） ：n （acetone） ： n（formaldehyde）=0.6：0.0：1.8,the amount of catalyst is 1.2% and polymerization concentration is 39%. The test of slurry fluidity in different cement showed that OSAF has good cement compatibility. Moreover,the disperse performance is less affected by the addi- tion of montmorillonite.

关 键 词：脂肪族高效减水剂 有机磺化 水泥净浆 分散性能 

分 类 号：TU528.042.2[建筑科学—建筑技术科学]