Anti-graffiti protection is becoming a common practice in many urban areas, because of increasing danger to buildings and monuments. The main aim of the present study was to evaluate the effectiveness of four commercially available polymeric materials on a very porous stone substrate against graffiti. Physical and chemical properties of the polymers were studied in order to select a class of products able to protect the surface from soiling and to reduce the impact of graffiti on the stone. Experiments were performed on specimens of a very porous bio-calcarenite (Lecce stone, LS), treated with microcrystalline wax (Bresciani, Italy), an emulsion of paraffin polymers (Art Shield-1, CTS, Italy), a fluoroelastomer in organic solvent (Fluoline HY, CTS) and a fluoroelastomer in water emulsion (Tecnoflon TN Latex, Solvay Solexis, Italy). Surface properties of treated specimens were evaluated by performing chromatic and gloss variation measurements, optical microscope analysis, water capillary absorption and water vapour permeability tests. In order to examine the anti-graffiti behaviour, treated samples were soiled by a permanent marker and the surface properties studied again after the cleaning.
Evaluation of four sacrificial anti-graffiti polymers on a highly porous stone substrate
M Licchelli;M Malagodi;S Varesi;M Weththimuni
2012-01-01
Abstract
Anti-graffiti protection is becoming a common practice in many urban areas, because of increasing danger to buildings and monuments. The main aim of the present study was to evaluate the effectiveness of four commercially available polymeric materials on a very porous stone substrate against graffiti. Physical and chemical properties of the polymers were studied in order to select a class of products able to protect the surface from soiling and to reduce the impact of graffiti on the stone. Experiments were performed on specimens of a very porous bio-calcarenite (Lecce stone, LS), treated with microcrystalline wax (Bresciani, Italy), an emulsion of paraffin polymers (Art Shield-1, CTS, Italy), a fluoroelastomer in organic solvent (Fluoline HY, CTS) and a fluoroelastomer in water emulsion (Tecnoflon TN Latex, Solvay Solexis, Italy). Surface properties of treated specimens were evaluated by performing chromatic and gloss variation measurements, optical microscope analysis, water capillary absorption and water vapour permeability tests. In order to examine the anti-graffiti behaviour, treated samples were soiled by a permanent marker and the surface properties studied again after the cleaning.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
