Development of anti-corrosive paint with improved toughness

Epoxy resins despite having excellent adhesion to various substrates, good corrosion and chemical resistance are less suitable for high-performance applications, as they are poor in ductility. In a new study, carboxyl terminated polyethylene glycol adipiate (CTPA) and carboxyl terminated polyethylene glycol succinate (CTPS) modifiers were synthesised and then used to modify bisphenol-A epoxy resin to raise the latter’s toughness.

Best performance on mild steel panels.

The study showed that in both the cases, 5 wt.% addition gave rise to the highest toughness as well as corrosion protection against salt fog and synthetic sea water exposure. However, between the two modifications the epoxy resin modified with 5 wt.% CTPS gave a better performance and so was pigmented with a mixture of zinc phosphate and red iron oxide to obtain the paint.

The study showed that the epoxy resin modified with 5 wt.% CTPS + 30 vol.% pigments gave rise to the highest toughness (flexibility), adhesion and corrosion resistance when applied on to mild steel panels.

The study is published in: Progress in Organic CoatingsVolume 120, July 2018, Pages 58-70.

Event tip:

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