Novel phosphorus-containing epoxy resin from renewable resource

A phosphorus-containing epoxy resin has been derived from a renewable resource, sebacic acid (SA), and formulated for flame-retardant applications.

Burning log in a fireplace with glass door.
The developed coatings were characterised in terms of their mechanical -

The synthesised epoxy resin was characterised by physicochemical and spectral analysis including Fourier-transform infrared (FTIR), 1H and 31P nuclear magnetic resonance spectroscopies. Curing of the epoxy resin mixture was carried out with polyamide hardener at 1:1 stoichiometry on equivalent weight basis. The developed coatings were characterised in terms of their mechanical, solvent, gel content, water absorption, chemical, thermal, and flame-retardant properties, while the glass-transition temperature and thermal stability of the coatings were analysed by differential scanning calorimetry and thermogravimetric analysis, respectively.

SA-based epoxy resin improves coating properties

The results revealed that the coatings with added SA-based epoxy resin showed good mechanical, chemical, and solvent-resistance properties. The thermal profile of the coatings manifested that the char yield increased with the concentration of the SA-based epoxy resin. Limiting oxygen index (LOI) and UL-94 tests were performed to understand the flame-retardancy behaviour of the synthesised coatings, revealing an enhancement as the concentration of phosphorus-containing epoxy resin was increased.

The study is published in: Journal of Coatings Technology and Research  March 2019, Volume 16, Issue 2, pp 531–542.

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The European Coatings Intensive Seminar Epoxy Coatings will give participants al the necessary information to start working in this area. Participants will learn what modern epoxy coatings are capable of, how specific properties can be achieved and much more.

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