An automotive pre-coated metal (PCM) system has been investigated to remove the wet coating process, such as pre-treatment, dip coating and spray coating for environmental regulations. However, automotive pre-coated metal sheets must have high flexibility and stiffness to overcome the harsh conditions such as encountered in cutting, press and the stamping process. For these reasons, a series of acrylic-grafted polyester coatings (i.e., AGP-0, AGP-10, AGP-20, AGP-30) were designed to satisfy both the surface hardness and the formability for an automotive PCM. The characteristics of the resins were measured by GPC, FT-IR and 1H NMR. The viscoelastic behavior and flexibility was evaluated using DMA and UTM. The physical properties such as pendulum hardness, pencil hardness and adhesion were measured to define the effect of incorporating acrylates. A cylindrical deep drawing tester was used to evaluate the formability of coatings. With increasing acrylate content, the storage modulus and Tg of the coatings increased because of increasing entanglement from long chain branches of acrylates and the cross-link network between a hydroxyl function of 2-HEMA and the polyester backbone. In terms of surface hardness, AGP-30 has the maximum hardness because of the high hardness of MMA. According to the tensile strength test, the result was similar to that of DMA with increasing acrylate content. From the result of formability, some defects occurred after the 30 mm drawing test, excepting that of AGP-10. In the case of the AGP-0 system, the coating film was destroyed by die pressure because of that the maximum tensile strength is lower than 5 MPa. The large defects occurred when cross-link density of the coating increased, in this case the destruction of cross-link networks is hardly occurred. Consequently, acrylic-grafting is a powerful method affecting both the surface hardness and the formability of the polyester coatings for an automotive PCM.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Synthesis and characterization of acrylic-grafted polyester coatings for automotive pre-coated metal


    Weitere Titelangaben:

    Synthese und Charakterisierung von mit Acryl gepfropften Polyesterbeschichtungen für vorbeschichtetes Metall für die Automobilprodukrion


    Beteiligte:
    Moon, Je-Ik (Autor:in) / Lee, Yong-Hee (Autor:in) / Kim, Hyun-Joong (Autor:in)


    Erscheinungsdatum :

    2012


    Format / Umfang :

    8 Seiten




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch





    Surface characterization of sputter silver-coated polyester fiber

    Jiang, S. X. / Qin, W. F. / Tao, X. M. et al. | British Library Online Contents | 2011


    METAL-COATED CARBON FIBERS FOR AUTOMOTIVE HEATING AND AUTOMOTIVE HEATING APPARATUS OF INCLUDING METAL-COATED CARBON FIBERS

    PARK YOUNG KYUN / LEE JONG BOK / LEE JAE HO et al. | Europäisches Patentamt | 2019

    Freier Zugriff

    Thermoplastic polyester in automotive applications

    Windscheif, W. / McCartha, G. | Tema Archiv | 1974


    Polyester moulding compounds in automotive applications

    Cahill,D.E. / BIP Chemicals,Polyester Moulding Components,GB | Kraftfahrwesen | 1987