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Kautschuk Gummi Kunststoffe, Vol.55, No.7-8, 350-350, 2002
Stabilization of dynamic properties following ageing
Tires of today are frequently required to operate at high loads and high speeds for extended periods of time. These severe operating conditions result in greater heat build up than would normally be encountered under less demanding service conditions. As a consequence, the excessive running temperature leads to reversion and consequently loss in dynamic properties that may in turn lead to reduced tire durability or, in extreme circumstances, to tire failure. Much effort has been expended over the years to maintain the dynamic properties of tire compounds during service, An established and, probably, best known approach is the use of so-called semi-efficient cure systems comprising reduced sulfur levels and increased accelerator levels [1]. However, though effective in improving the viscoelastic properties, this approach is only partially successful since lowering of sulfur levels negatively influences other desirable properties such as tear and flex/fatigue life. Additionally lower sulfur dosage is undesirable [2] when considering the adhesion criteria to brass plated steel cord. The effect of antireversion agent, 1,3 bis (citraconimidomethyl) benzene (Perkalink 900) on viscoelastic properties following ageing has been studied in both NR and SBR compounds. This paper provides some interesting feature with regard to stabilization of viscoelastic properties following ageing by using 1, 3 bis (citraconimidomethyl) benzene (Perkalink 900).
Keywords:truck tires (skim);passenger tire (tread);loss tangent;antireversion agent;1,3 bis (citraconimidomethyl) benzene;ageing