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Home  > Raw materials & technologies  > Applications  > Automotive coatings  > Overview of scratch recovery characteristics

Monday, 13 July 2020
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Raw materials & technologies, Applications, Automotive coatings

Overview of scratch recovery characteristics

Tuesday, 16 March 2010

The effect of weathering and thermal treatment on the scratch recovery characteristics of clearcoats was measured.

Automotive clearcoats were introduced in the market in the 1980s. Source: 36clicks -Fotolia.com

Automotive clearcoats were introduced in the market in the 1980s. Source: 36clicks -Fotolia.com

Christopher Scheubert from Ford Motor Company and researchers from Bayer Material Science in USA and Germany measured the scratch and scratch recovery characteristics of two clearcoats, a polyurethane and an acrylic/melamine/silane clearcoat, by a variety of methods. On most size scales tested, the polyurethane possessed superior scratch and mar resistance. The polyurethane also possessed improved scratch recovery after warming for 2 h at 60°C. After 2000 h of accelerated weathering, the scratch recovery characteristics of the polyurethane were largely maintained, while the acrylic/melamine/silane showed a significant drop in scratch recovery performance. Performance of both coatings was related to Tg hardness and crosslink density. More information about that topic was published in the "Journal of Coatings Technology and Research" Volume 7, March 2010.

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