异构醇醚非离子乳化剂在乳液聚合中的应用及性

关键字：异构醇醚,非离子,乳化剂,聚合

[联泓（江苏）新材料研究院有限公司，江苏 常州  213164]

 
    摘要：通过苯丙乳液聚合实验，对异构十三醇醚非离子乳化剂在物性参数、乳液聚合稳定性和乳液性能方面的表现进行了考查。结果表明，LPS非离子乳化剂在相同的EO数和乳化能力情况下，浊点高于烷基酚类产品（ＯＰ-10），有利于实现聚合反应过程中浊点和乳化能力的平衡。对于LPS非离子乳化剂，EO数和用量的变化并未对乳液的泡沫、粘度和成膜耐水性等造成显著差异，而对于乳液钙皂稳定性的影响则较为明显。在相同用量下，随着非离子乳化剂EO数的增加，乳液钙皂稳定性明显改善；使用相同EO数的乳化剂，随着非离子乳化剂用量的增加，乳液钙皂稳定性也呈现提高的趋势。向乳液中后添加非离子乳化剂也能够改善钙皂稳定性，但效果相对弱于在聚合反应中添加非离子乳化剂。聚合反应中可使用LPS 3015（EO数15）以满足对于聚合稳定性和乳液钙皂稳定性的要求，而在乳液产品中的后添加则可使用LPS 3040（EO数40）。
    关键词：乳液聚合；非离子乳化剂；异构十三醇醚；钙皂稳定性能
    中图分类号：TU56+1.69；TQ316.33+4        文献标识码：A        文章编号：1001-702X（2017）11-0005-05
 

Application of isotridecanol ethoxylate nonionic emulsifiers in emulsion polymerization and effeit on properlies
NIU Lin，YING Ban，GU Jian，LI Lei
[Evima（Jiangsu） Research Institute of Advanced Materials Co. Ltd.，Changzhou 213164，China]

    Abstract：Nonionic emulsifiers of isotridecanol ethoxylate type（Levima LPS series） were used in acrylate-styrene emulsion polymerization, and the influence of emulsifiers on polymerization stability and latex properties were studied. From the polymerization results，it could be found that the reaction stability of isotridecanol ethoxylate samples were better than that of NPEO samples，which was due to the better balance of cloud point and emulsifying ability of isotridecanol ethoxylates. Regarding to the resultant latex, there were no obvious differences in foaming and viscosity for samples using different Levima LPS products. For the calcium ion stability，under the same dosage amount，LPS emulsifiers with higher EO numbers could give out better performance，and the calcium ion stability could also be improved if the amount of LPS emulsifiers were increased. The post addition of isotridecanol ethoxylates was helpful for the improvement of calcium ion stability，but the efficiency was weaker compared with the addition in polymerization process. Considering the different functions of LPS emulsifiers in polymerization and latex，LPS 3015 was recommended to be used in polymerization in order to help reaction stability as well as calcium ion stability，while LPS 3040 acted better in post-addition.
    Key words：emulsion polymerization，nonionic emulsifier，isotridecanol ethoxylate，calcium ion stability