Automotive coatings must provide excellent resistance to chemical and mechanical damage in order to maintain a vehicle's long-term appearance and the owner's long-term satisfaction. The Automotive Industry and coating suppliers are partners in design and delivery of future coatings capable of meeting customer demanded performance. As a result of this partnership, new coating materials are being explored based on oligomer chemistry that show promise in providing improvements in both physical and chemical properties/performance and the long-term maintenance of these properties. Oligomeric systems are also useful in the design of low VOC (volatile organic content) coatings. These supersolid coatings will be capable of meeting current and future air quality standards. Measurement techniques for monitoring chemical and mechanical property changes, including cure rate, crosslinking, tensile properties, rheology, and scratch and mar performance, were explored. Laboratory mar tests, wet and dry rub tests, which have been validated by commercial experience, are currently used as the basis of comparison of a coating's mechanical performance. QUV accelerated weathering was combined with micro-scratch experiments, atomic force microscopy, optical microscopy, image analysis and IR surface characterization techniques to provide correlations between chemical composition and mechanical performance, and an indication of service life.


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    Title :

    Oligomers in the evolution of automotive clearcoats: mechanical performance testing as a function of exposure


    Contributors:
    Adamsons, K. (author) / Blackman, G. (author) / Gregorovich, B. (author) / Lin, L. (author) / Matheson, R. (author)


    Publication date :

    1998


    Size :

    11 Seiten, 9 Bilder, 5 Tabellen, 32 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




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