ACCESS
This paper attempts to reduce harmful gases through the synthesis of epoxy resin aqueous dispersion. Firstly, the non-ionic epoxy emulsifier was synthesized from polyethylene glycol (PEG) 4000 and epoxy resin by the mass ratio of 1.25:1 at 120°C for 4 hours. Then, the reaction chain extension of epoxy resin and bisphenol A (BPA) was carried out by the mass ratio of 1:2.7 at 160°C. After reaching a certain equivalent value of epoxy, the carboxylic terminated-polyethylene glycol (CT-PEG) and the synthetic reactive emulsifier were added in turns. Finally, the white milk-like epoxy aqueous dispersion was prepared by reverse conversion. Experimental verification shows that the prepared epoxy resin aqueous dispersion enjoys good storage stability; it can be mixed directly with water-borne curing agent, without requiring any high-speed dispersion. Thanks to these properties, the proposed epoxy resin aqueous dispersion can prevent the intensive release of volatile organic compounds (VOCs) in the production process, and promote environmental protection and worker safety. Suffice it to say that this dispersion is applicable to organic solvents in the production of industrial anticorrosive coatings, floor coatings, and wall coatings.
reactive epoxy emulsifier, epoxy aqueous dispersion, epoxy chain extension, stability
Back G. E., Wang P. C., Corley L. S. (2004). Water dispersible epoxy resins. US4063901.
Birnbrich P., Thomas H., Sabbadini G. (2003). Process for the proparetion of aqeous epoxy dispersion. US5236974.
Chen T., Gu G. F. (2001). Study on novel epoxy resin emulsion and its film formation. Journal of Building Materails, Vol. 4, No. 4, pp. 119-123. http://doi.org/10.16606/j.cnki.issn 0253-4320.2018.03.026
Elmore J. D., Kincaid D. S., Komar P. C., Nielsen J. E. (2002). Waterborne epoxy protective coatings for metal. Journal of Coatings Technology, Vol. 74, No. 931, pp. 63-69. http://dx.doi.org/10.1007/BF02697969
Hawkins C. A., Sheppard A. C., Wood T. G. (1997) Recent advances in aqueous two-component systems for heavy-duty metal protection. Progress in Organic Coatings, Vol. 32, No. S1-4, pp. 253-261. http://doi.org/10.1016/S0300-9440(97)00036-2
He Q. F., Chen Z. M. (2004). Study on synthesis of waterborne epoxy resin emulsifier and emulsion preparation. Chemical Reaction Engineering in Process, Vol. 20, No. 3, pp. 254-259. http://doi.org/10.3969/j.issn.1001-7631.2004.03.013
Li H. Q., Jian Y. Q., Wang L. Y., Huang Z. H. (2007). Application of epoxy resin adhesive in highway bridge. West-China Exploration Engineering, Vol. 19, No. 8, pp. 156-185. http://doi.org/10.3969/j.issn.1004-5716.2007.08.060
Ma C. Y., Zheng W. J., Zhou D. W., Lu C. H. (2005). Synthesis of a novel waterborne epoxy resin. Guangzhou Chemistry, No. 3, pp. 30-35. http://doi.org/10.3969/j.issn.1009-220X.2005.03.002
Piechocki C. (2002). Modified polyoxythylene epoxy resin amplifiles and stable aqeous epoxy dispersion thereof.US5118729.
Wang J., Du Z. L., Li R.X., Wu D. C. (2000). Phase Inversion emulsification of waterborne dispersions of epoxy resin. Journal of Functional Polymers, No. 2, pp. 141-144. http://doi.org/10.3969/10.3969/j.issn.1008-9357.2000.02.005
Xia X. N., Liu Y. T., Xu W. J. (2003). Development of water-borne modification of epoxy resin. Modern Chemical Industry, Vol. 23, No. 2, pp. 97-99. http://doi.org/10.3321/j.issn:0253-4320.2003.z1.027
Zhao M. L., Wang, G. J., Ma, W. S. (2006). Research progress of waterborne epoxy resin system. Adhesion in China, Vol. 27, No. 6, pp. 22-25. http://doi.org/10.3969/j.issn.1001-5922.2006.06.008