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Home  > Raw materials & technologies  > Applications  > Protective & Marine coatings  > Fatty acid based waterborne epoxy ester re...

Tuesday, 24 September 2019
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Raw materials & technologies, Applications, Protective & Marine coatings

Fatty acid based waterborne epoxy ester resin for coating applications

Monday, 22 June 2015

Researchers synthesised  high performance water soluble epoxy ester resin by partially reacting bis-phenol A based epoxy resin with different fatty acids.

Tung oil fatty acid based epoxy ester coating has excellent anticorrosive properties. Source: Gordon Bussiek/Fotolia

Tung oil fatty acid based epoxy ester coating has excellent anticorrosive properties. Source: Gordon Bussiek/Fotolia

The resultant epoxy ester resin was then reacted with diethanol amine. These resins were characterised by FTIR, NMR, DSC and TGA.

Resin shows excellent anticorrosive properties

Further, the prepared epoxy esters were neutralised using phosphoric, lactic, acetic and hydrochloric acids to make them water soluble. Mild steel panels were coated with the water soluble epoxy ester resins and their performance were evaluated by monitoring adhesion, tensile, scratch hardness, bend and impact resistances. The corrosion resistance properties of the coatings were evaluated by salt spray, seawater immersion and electrochemical impedance spectroscopy. It is observed that phosphoric acid neutralised tung oil fatty acid based epoxy ester has better mechanical and anticorrosive properties than the rest of the water soluble polymers. This resin can be used as binder for decorative and anticorrosive coatings.

The study is published in: Progress in Organic Coatings, Volume 87, October 2015, Pages 95-105

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