Created with Sketch.

20. May 2022 | Application Areas

Bio-based one-component epoxy resin

Researchers have described a novel high-performance anticorrosive coating from an agro-industrial byproduct.
Cashew nutshell liquid was used for manufacturing a one-component anticorrosive epoxy coating. 
Image source: sarangib - Pixabay (symbol imag

In a recently conducted work, an epoxy resin produced from an agroindustrial byproduct, cashew nutshell liquid (CNSL), was used for manufacturing a one-component anticorrosive epoxy coating. CNSL-based epoxy resin (e-CNSL) was synthesised using a solvent-free methodology with performic acid generated in situ.

The chemical structure of resin was evaluated and the curing parameters of the epoxy-phenol system with 1-methylimidazole (1-MIM) as an accelerator were investigated. The use of only 5% by weight of 1-MIM was efficient to catalyse the reaction, obtaining the lowest cure temperature (150 °C). The coating showed high crosslinking and good thermal-mechanical performance, where the initial decomposition temperature was 200 °C and glass transition temperature was 30 °C.

Corrosion protection

The anti-corrosive performance of e-CNSL/MIM5 exposed to salt spray and 3.5% w/v NaCl solution was studied. The coating presented high impedance module and high adhesive property, suffering low delamination during the tests. According to the study, the one-component bio-based coating developed is promising to be applied for corrosion protection purposes.

The study has been published in Progress in Organic Coatings, Volume 167, June 2022.


EC Tech Report Automotive Coatings

Your up-to-date bundle on the topic of automotive coatings: learn more about a new perylene black pigment for NIR reflective coatings that support autonomous driving; find out about polyurethane systems who make the leap to the digital application technology of the future, whilst simultaneously becoming more sustainable; and gain insights into a new, automated method for rapidly and accurately measuring viscosity during coatings production. In addition to these and further articles about the latest technical developments, the Tech Report is rounded off with valuable market insights and important fundamentals about automotive coatings formulation.

This could also be interesting for you!


You are currently not logged in

To leave a comment, please log in.

For continuously improving and optimizing our websites, we use cookies. By using our website, you agree to the usage of cookies. For more information, please visit our Privacy policy.