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Wednesday, 17 October 2018
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Raw materials & technologies, Applications

Development of anti-corrosive paint with improved toughness

Monday, 11 June 2018

Recently scientists developed an anti-corrosive paint with improved toughness by using carboxyl terminated modified epoxy resin.

Source: v74 – stock.adobe.com

Source: v74 – stock.adobe.com

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:

The European Coatings Seminar 2-k Industrial Coatings will help understanding everything you need to know about getting into this area of the coatings industry. The speaker will address the alternatives to common hardeners, discuss the capabilities of hybrid systems and elaborate on the various kinds of functionalities currently possible

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