Acoustic vibrational material from fiber-reinforced polybutadien

Details Acoustic vibrational material from fiber-reinforced polybutadien Acoustic vibrational material from fiber-reinforced polybutadien

1992-06-23

1997-09-02

Sellers, Robert E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523466, 523468, 525122, 181167, 181169, C08K 714, C08K 702, C08L 6300

Patent

active

056632207

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. This region is much higher than that of the conventional epoxy resin modified with polybutadiene elastomer mainly including 1,4-linked unit. Decrease in elastic modulus of the epoxy resin with increase of temperature is lesser in the epoxy resin of the present invention, whereas larger in the conventional one. Thus compatibility between large internal loss and high elastic modulus is achieved.

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