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An Overview of the Scratch Resistance of Automotive Coatings: Exterior Clearcoats and Polycarbonate Hardcoats
Ford Motor Company, Research and Advanced Engineering, Dearborn, MI 48124, USA
* Author to whom correspondence should be addressed.
Received: 17 September 2012; in revised form: 23 October 2012 / Accepted: 1 November 2012 / Published: 12 November 2012
Abstract: The scratch resistance of coatings used on two highly visible automotive applications (automotive bodies and window glazings) were examined and reviewed. Types of damage (scratch vs. mar), the impact on customers, and the causes of scratch events were investigated. Different exterior clearcoat technologies, including UV curable and self-healing formulations were reviewed, including results from nano- and macro-scratch tests. Polycarbonate hardcoat glazings were tested vs. annealed glass samples using a Taber abraser, with the resulting damage analyzed using transmitted haze measurements and optical profilometry. A correlation between the damage seen in glass samples (many smooth, shallow mars) and the best hardcoat samples (fewer, deeper scratches) and the haze measurements was discussed. Nano-scratch results showed similar fracture forces, but measurably improved mar resistance for the hardcoats/glass system compared to exterior clearcoats.
Keywords: scratch; automotive; clearcoats; polycarbonate; hardcoats
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Seubert, C.; Nietering, K.; Nichols, M.; Wykoff, R.; Bollin, S. An Overview of the Scratch Resistance of Automotive Coatings: Exterior Clearcoats and Polycarbonate Hardcoats. Coatings 2012, 2, 221-234.
Seubert C, Nietering K, Nichols M, Wykoff R, Bollin S. An Overview of the Scratch Resistance of Automotive Coatings: Exterior Clearcoats and Polycarbonate Hardcoats. Coatings. 2012; 2(4):221-234.
Seubert, Christopher; Nietering, Kenneth; Nichols, Mark; Wykoff, Rick; Bollin, Shannon. 2012. "An Overview of the Scratch Resistance of Automotive Coatings: Exterior Clearcoats and Polycarbonate Hardcoats." Coatings 2, no. 4: 221-234.