Gasket containing fuel permeation barrier
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United States of America Patent
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Aug 18, 2009
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N/A
app pub date -
May 3, 2007
filing date -
May 3, 2007
priority date (Note) -
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Abstract
A method for reducing fuel permeation through gasketed joints in an internal combustion engine (10) includes surface treating the gaskets in a halogenated medium before placing them into service. A low-cost elastomer such as acrylic, EPDM or HNBR, can be used for the gasket body. The halogenated medium may comprise either a liquid bath or a gaseous bath, into which the gasket is immersed. The halogenated medium bath is excited by heating to accelerate the halogenation process. A gasket treated according to this invention possesses a chemically altered exterior surface which substantially enhances its fuel permeability resistance at relatively low cost.
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