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Wednesday, 18 September 2019
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Raw materials & technologies, Applications, Automotive coatings

Scratch characteristics of automotive clearcoats compared

Friday, 23 March 2012

A new study focuses on the analysis of scratch characteristics of automotive clearcoats containing silane modified blocked isocyanates via carwash and nano-scratch tests.

Study analyses scratch characteristics of automotive clearcoats Source: Igor Tarasov - Fotolia.com

Study analyses scratch characteristics of automotive clearcoats Source: Igor Tarasov - Fotolia.com

Chinese researchers investigated in their new study the scratch characteristics of automotive clearcoats based on an acrylic polyol resin, with butylated melamine and silane modified blocked isocyanates. The scratch behaviors were analysed via Amtec-Kistler car-wash and nano-scratch tests. The scratch resistance was verified from the surface profiles and images of the scratched clearcoats captured using AFM and SEM. The results showed that a close correlation existed between the scratch resistance data obtained from the car-wash and nano-scratch tests for clearcoats made from acrylic polyol resin, with melamine and silane modified blocked isocyanates. Also, all the mechanical properties, including scratch resistance, noticeably improved due to the increased crosslinking networks via the formation of urethane bonds, when the portion of silane modified blocked isocyanates was increased. Read the complete study in "Progress in Organic Coatings”, vol. 74, issue 1, May 2012, pp. 192-203.

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