The Bombay Technologist

Nanotech Enabled Anti-Graffiti Clear Coating System

Pratik Dewan

Dyestuff Technology Department

Keywords: Anti-Graffiti, Polysilazanes, Hydrophobic and Oleo Phobic Ligands, Nanoparticles, Silicone Resin, Nanometal Primer, Dry Film Thickness.

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Abstract

Here is a 'Nanotechnology Approach to High Performance Anti-Graffiti Coatings'. Anti-graffiti is a property of a coating that does not allow dye, permanent markers, stickers, graffiti, paint or any other markings to bond to dry film. It is a special modified Silicone resin based formulation, Poly Urethane and acrylic based non-hazardous coating. Apart from being cost effective, this coating offers numerous benefits over the conventional alkyd enamel paint system and Epoxy cum Poly Urethane based systems. Depending on the substrate and the severity of graffiti, different coatings offer different advantages and disadvantages. Because of its non-sticky characteristic, it does not allow dust particles to stick upon its body. This particular property of Anti-graffiti top coat renders a better aesthetic look during service. Anti-graffiti coating is on trial on the coaches of passenger trains like Shatabdi in India.