Claims
- 1. An acoustic vibrational material comprising a fiber reinforcement material and a elastomer modified epoxy resin, said elastomer modified epoxy resin comprising
- an epoxy resin; and
- a polybutadiene elastomer wherein the elastomer has principal chain terminals, the terminals having functional groups selected from the group consisting of hydroxyl, carboxyl, thiol, acid anhydride, primary amine, secondary amine and tertiary amine and containing not less than 90 mole percent of 1,2-linked units, the polybutadiene elastomer being incorporated into the molecular chains of the epoxy resin;
- wherein the mole ratio of the polybutadiene elastomer to the epoxy resin is between 1:9 and 1:3.
- 2. An acoustic vibrational material of claim 1 wherein the elastomer is blended with the epoxy resin allowing a part or all of the elastomer to react during curing.
- 3. An acoustic vibrational material of claim 1 wherein the fiber reinforcement material is selected from the group consisting of aramid fiber, glass fiber, carbon fiber, ultra-drawn polyethylene fiber and polyallylates.
- 4. The acoustic vibrational material of claim 1 wherein the elastomer is incorporated into the molecular chains of the epoxy resin by reacting the elastomer with the epoxy resin prior to curing the epoxy resin.
- 5. An acoustic vibrational material comprising:
- fiber reinforcement material; and
- an elastomer modified epoxy resin bound to said fiber reinforcement material, said resin formed by reacting a tri-functional glycidyl amine epoxy monomer with a polybutadiene elastomer containing 95 mole percent 1,2 linked units and having carboxyl principal chain terminal groups, wherein said elastomer is present in a range of 10 to 25 mole percent based on said epoxy monomer.
Priority Claims (1)
Number |
Date |
Country |
Kind |
1-180853 |
Jul 1989 |
JPX |
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Parent Case Info
This is a continuation of application Ser. No. 07/550,955 filed on Jul. 11, 1990, now abandoned.
US Referenced Citations (15)
Foreign Referenced Citations (2)
Number |
Date |
Country |
0 149 357 A2 |
Jul 1985 |
EPX |
5-115794 |
Sep 1980 |
JPX |
Non-Patent Literature Citations (2)
Entry |
Database Japs, Japanese Patent Office, vol. 11, No. 396 (E-568) and JP-A-62157500 (Agency of Ind. Science and Technology) 13-07-1987, abs. date Dec. 24, 1987. |
Database WPI, abs. No. 80-74373c, Derwent Publications Ltd., London, GB and JP-A-55115794 (Toray Ind. Inc.) Feb. 17, 1979. |
Continuations (1)
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Number |
Date |
Country |
Parent |
550955 |
Jul 1990 |
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