With the continued trend to ever decreasing space in the engine bay, temperatures continue to rise, placing ever more demanding requirements on the components operating in this environment. One consequence of this is the need for Elastomers capable of ever-greater long-term high temperature resistance. Higher operating temperatures has also resulted in the development of more aggressive automotive fluids and lubricants, further necessitating the use of specialty elastomers combining both greater heat and fluid resistance. This paper will describe the advances made and latest developments with long-term high temperature resistant ACM elastomers and associated materials. These materials are designed to provide both functional performance and processability in a range of automotive applications. New Generation ACM elastomers (described here for convenience as HT-ACM) are characterised by excellent long-term heat and fluid resistance. The paper has reviewed some of the extensive work undertaken by Zeon with this family of HT-ACM elastomers. Through data presented here it has been shown that these elastomers are well suited to meeting automotive applications requiring a balance of low temperature performance coupled with long term performance at high temperatures and good resistance to commonly specified automotive lubricants. Compounding flexibility through the use of blends of these polymers with or without additional low temperature plasticiser allows users to develop suitable compounds to meet their needs. Such compounds are already well established in injection moulding applications and also some extrusion applications. As noted, optimisation of the ACM-E development elastomer and associated materials is continuing. Initial results with these products are very encouraging and it has been demonstrated that compounds utilising these materials are capable of meeting the high and low temperature requirements of the latest generation (HT) TDI hoses. Of particular note, is the higher retained tensile strength compared to ACM AR22 after air ageing at both 175 deg C and 190 deg C. These characteristics in combination with significant improvements in scorch behaviour will provide users with both enhanced component properties and improved processing behaviour in extrusion operations. Benefits of the HT-ACM elastomers can be summarised as: ACM AR12 and ACM AR22 have excellent long term heat resistance. HT-ACM can be compounded to meet requirements of -40 deg C to 175 deg C with peaks to 190 deg C.


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    Titel :

    Advances with high temperature resistant ACM elastomers


    Weitere Titelangaben:

    Fortschritte bei hoch temperaturbeständigen ACM Elastomeren


    Beteiligte:
    Abraham, Peter (Autor:in) / Burczak, Ivan (Autor:in) / Hooley, Peter (Autor:in) / Heider, Walter (Autor:in) / Manley, Paul (Autor:in) / Anderson, Andy (Autor:in) / Bruner, Rhoda (Autor:in) / Tao, David (Autor:in) / Aimura, Yoshiaki (Autor:in) / Masuda, Hirofumi (Autor:in)


    Erscheinungsdatum :

    2005


    Format / Umfang :

    13 Seiten, 11 Bilder, 7 Tabellen, 10 Quellen


    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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