We have accumulated extensive chemical resistance test data on various Ryton® PPS compounds in various automotive fluids. This includes data on different compounds exposed to various fluids at elevated temperatures for up to 24 months. The variety of compounds used in these studies illustrates how a range of different filler and additive systems do not incur appreciable differences in resistance to fuels, lubricating oils, or hydraulic fluids. Considering this data, it is clear that all Ryton® PPS compounds, regardless of the particular filler and/or additive systems used, are virtually impervious to all common automotive fuels (including alcohol-containing flex fuels), lubricating oils, transmission fluids, brake fluids, and other hydraulic fluids. Although differences in filler and additive systems can affect resistance to engine coolants, Ryton® PPS compounds are generally very resistant to glycol-based and silicone containing coolants, even at elevated temperatures. Ryton® R-4-220NA is specially formulated for enhanced resistance to the detrimental effects of water at elevated temperatures (see Hot Water), and therefore tends to retain a greater degree of mechanical strength over long-term exposure to high temperature engine coolants, especially the more aggressive new “long-life” (OAT) coolants.
Effects of Various Automotive fluids on Ryton® PPS Compounds: |
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