The automotive industry has long been looking to improve the toughness and impact resistance of automobile and truck body panels. Many toughening agents available in the marketplace today provide toughness and impact strength, ut at the expense of surface profile and final painted part appearance. Thus, in the past, surface appearance and part toughness were a compromise of one feature versus the other. This paper deals with a new toughening agent called Dion 31627-00, which is based on unique and innovative chemistry that has the potential to yield a tough, impact resistant, Class A surface, with other very desirable benefifts like improved flexibility, low moisture sensitivity, high energy absorption and improved product stability. This product can be used in SMC, BMC, TMC and pultrusion formulations. Furthermore, SMC made with this novel toughening agent has demonstrated an ease of processing even with higher filler loadings, while still exhibiting consistent and reproducible thickening response. Molded parts have demonstrated high green strength out of the mold, while reducing process cracking and damage during the punch-press, drilling and fixturing stages. Molded part-to-part adhesion, as well as paint adhesion, showed no detrimental effects, even at high thermoplastic additive loadings. The toughening agent has been tested with several types of unsatured polyester resins that varied significantly in double bond density and maintains toughness with no loss of dimension or surface control. Several commerically available low profile additives have also been evaluated with the toughening agent and have demonstrate very good compatibility, excellent mechanical properties, and Class A surface appearance. Tough, impact resistant Class A body panels are now a reality.


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    Titel :

    Tough, class A automotive resin systems


    Weitere Titelangaben:

    Zähe Harzsysteme Klasse A für den Automobilbau


    Beteiligte:
    Michaels, J. (Autor:in)


    Erscheinungsdatum :

    1992


    Format / Umfang :

    8 Seiten, 5 Bilder, 10 Tabellen, 7 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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