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Friday, 20 September 2019
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Raw materials & technologies, Applications, Industrial coatings

Blending asphalt cement and PEA for industrial coatings

Friday, 24 May 2013

Researchers from Egypt examined the potential synergy of mixing asphalt cement with polyesteramide resin to produce industrial coatings for steel applications.

The coating blends were prepared for industrial coatings

Source: Karelin Dmitri/Fotolia

The coating blends were prepared for industrial coatings

Source: Karelin Dmitri/Fotolia

Asphalt cement is a material commonly used in coating applications due to its good adhesion properties and relatively low cost. Unfortunately it has the drawback of being slow to dry. Long polyesteramide resin (PEA) is predominantly used for air-dry and force-dry industrial coatings onto metal surfaces, yet is considered to be a relatively weak material. Researchers from Al Azhar University and Egyptian Petroleum Research Institute, Cairo, Egypt, examined the potential synergy of mixing asphalt cement with polyesteramide resin to produce industrial coatings for steel applications.

Effective material for industrial coating applications

Aim of the study was to overcome the slow drying time of the asphalt cement and the relative weakness of PEA resin. To achieve this, PEA resin was mixed with asphalt cement in a range of concentrations from 3 to 12 % (w/w). The prepared coating blends were characterised physically using scanning electron microscopy (SEM), while the performance of the coatings were evaluated for mechanical properties and corrosion resistance in selective chemical reagents, following complete immersion for the duration of 84 days. The results obtained concluded that generally, a blend of asphalt cement and polyesteramide resin produces an effective material for industrial coating applications. Also, 9 % and 12 % PEA resin content produced high-quality anti-corrosive material as compared to virgin asphalt cement. The degree of modification depends upon the properties of the asphalt and the content level of the polyesteramide.

The study will appear in "Progress in Organic Coatings” (http://dx.doi.org/10.1016/j.porgcoat.2013.04.010).

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