Acoustic vibrational material of fiber reinforcement with epoxy resin and epoxy-reactive polybutadiene
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United States of America Patent
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Mar 14, 2000
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N/A
app pub date -
May 26, 1995
filing date -
Jul 13, 1989
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Expired
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Abstract
This invention provides an acoustic vibrational material containing various fibers as the reinforcement material and having the epoxy resin as the matrix resin, wherein the epoxy resin is modified by a polybutadiene base elastomer containing not less than 90 mole percent of 1,2-linked units. The epoxy resin modified with the above polybutadiene elastomer exhibits a maximum value of loss coefficient at the temperature region near the room temperature. Thus compatibility between large internal loss and high elastic modulus is achieved.
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