Nano Archive

Effect of nano layered silicates on automotive polyurethane refinish clear coat

Ahmadi, B. and Kassiriha, M. and Khodabakhshi, K. and Mafi , E. R. (2007) Effect of nano layered silicates on automotive polyurethane refinish clear coat. Progress in Organic Coatings , 60 (2). pp. 99-104. ISSN 0300-9440

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In the present investigation, effect of nano layered silicates on the properties of an automotive refinish clear coat based on polyurethane has been studied. Observation by means of X-ray diffraction (XRD) technique indicates the presence of a partially intercalated structure due to dispersion of nano layers in the polymer matrix. Some levels of hazing have been established by increasing the amount of nano-filler. The effect of nano-filled clear coat on the reflectance spectra of a metallic coated substrate has been studied under three different light sources using a goniospectrophotometer and compared with a blank clear coat to determine if it can be identified by human eye. Scratch and mar resistance tests showed significant improvement even 48 h after application, when there was no gloss reduction due to usage of nano-filler. Gloss retention was increased by about 10% in presence of only 3 wt% of nano-filler. In addition to some scratch and mar resistance tests, other standard tests like adhesion, impact and bending were performed to find out optimum nano-filler/polymer ratio. (c) 2007 Elsevier B.V. All rights reserved.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:7337
Deposited By:JNCASR
Deposited On:04 Nov 2009 07:48
Last Modified:04 Nov 2009 07:48

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