The introduction of VOC compliant waterborne basecoats and solventborne basecoats on one hand and the introduction of VOC compliant clearcoats on the other hand forces to look to the interactions between the two systems. As well known from studies in the automotive OEM area small molecules like HALS and UV-absorbers additives diffuse from the clearcoat into the basecoat. This influences the durability performance of the system. The main question addressed in this paper is the interaction of the binder system of the basecoat and clearcoat. In general crosslinkers (e.g. polyurethane coatings) are rather low molecular weight materials which may diffuse between layers as well. Also the lower molecular weight functional resins of the binder may move throughout the system. The interactions of basecoat/clearcoat combinations were investigated by means of chemical and physical techniques. The effect of a medium solid clearcoat, a VOC compliant polyurethane clearcoat and UV-clearcoat on interpenetration, physical and paint properties were studied. Also some attention is paid to the diffusion of HALS and UV-absorbers from the clearcoat into the basecoat.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Interactions between basecoats and clearcoats in car refinish systems


    Additional title:

    Wechselwirkungen zwischen Grund- und Deckbeschichtungen in Autonachlackierungssystemen




    Publication date :

    2007


    Size :

    5 Seiten, 9 Bilder, 3 Tabellen, 4 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Easier repair. A cellulose-based rheology additive enables high performance VOC compliant car refinish clearcoats

    Bhattacharya, Deepanjan / Allen, John / Booton, Doug et al. | Tema Archive | 2007


    Basecoats with Direct Adhesion to TPO

    Kondos, C. A. / Kahle, C. F. / Society of Automotive Engineering | British Library Conference Proceedings | 1998


    Basecoats with direct adhesion to TPO

    Kondos, C.A. / Kahle, C.F. II | Tema Archive | 1998


    Basecoats with direct adhesion to TPO

    Kondos,C.A. / Kahle,F.C. / PPG Industries,US | Automotive engineering | 1998


    Development of Rheologically Controlled Wateborne Basecoats

    Okawa, K. / Kozaki, M. / Muramatsu, M. et al. | British Library Conference Proceedings | 1999