Synthesis and Characterization of Soya Fatty Acid-Based Self-Emulsifiable Alkyds

Abstract

Water-based self-emulsifying alkyd resins were prepared from soya oil fatty acid, phthalic anhydride, isophthalic acid, benzoic acid, and polyols with different functionality viz. 2-butyl-2-ethyl-1,3-propane diol, trimethylol propane, pentaerythritol, and di-pentaerythritol. Dimethylol propionic acid was used as internal emulsifier. The resin was neutralized with triethylamine, and finally dispersed in water to obtain water-based self-emulsifying alkyd resins. The effect of functionality of polyols used in synthesis, on various properties of water-based alkyd resins shows that, as the functionality increases surface coating properties viz. drying time, hardness, chemical and solvent resistance, has improved while flexibility and impact resistance decreased.

GRAPHICAL ABSTRACT

Keywords:

• Dipentaerythritol
• low VOC
• polyol functionality
• self-emulsifying alkyd

ACKNOWLEDGMENTS

The authors are grateful to the Director, Sophisticated Instrumentation Center for Applied Research and Testing (SICART), Vallabh Vidyanagar, India and the Director, Institute of Science and Technology for Advanced Studies and Research (ISTAR), Vallabh Vidyanagar, India for providing necessary research, testing and library facilities. Authors also wish to express their gratitude to Perstorp Speciality Chemicals AB, SE-284 Perstorp, Sweden for providing TMP, DPE, BEPD and DMPA.