Anti-graffiti agents to prevent spray paint adherence
Tuesday, 24 May 2011
A new study describes the effect of coating different construction materials with two anti-graffiti agents on the dispersive component of their surface energy.
Different construction materials were coated with two anti-graffiti agents Source: Kalle Kolodziej - Fotolia.com
Coating building materials with anti-graffiti treatments hinders or prevents spray paint adherence by generating low energy surfaces. A new study describes the effect of coating cement paste, lime mortar, granite, limestone and brick with two anti-graffiti agents on the dispersive component of the surface energy of these five construction materials. The agents were rediluted in their respective solvents at concentrations of 5 and 75 % and the values were determined with inverse gas chromatography at infinite dilution. The dispersive energy of the five materials prior to coating, ranked from highest to lowest, was as follows: limestone > granite > cement paste > brick > lime mortar. After application of the two anti-graffiti compounds, CF3 terminals were found to reduce the surface energy of both basic (limestone and lime mortar) and acidic (granite) substrates more effectively than CH3 terminals.
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