Claims
- 1. A compounding process for preparing a composite comprising the steps of
- introducing one or more fillers and a matrix material into a stirred ball mill; and
- subjecting said fillers and said matrix material to a combination of shear and impact forces under reaction conditions including reaction time sufficient to reduce the size of agglomerates formed by said fillers to a value no greater than 1000 times the size of said filler to disperse said fillers throughout said matrix material.
- 2. The compounding process of claim 1 wherein said agglomerate size is no greater than 100 times the size of said filler.
- 3. The compounding process of claim 2 wherein said pre-determined value of said agglomerate size is no greater than 10 times the size of said filler.
- 4. The compounding process of claim 1, 2, or 3 wherein one or more of the characteristic dimensions of said filler is less than 1 .mu.m.
- 5. The compounding process of claim 4 wherein one or more of the characteristic dimensions of said filler is less than 0.1 .mu.m.
- 6. The compounding process of claim 1 further comprising adding a viscosity modifier to said stirred ball mill.
- 7. The compounding process of claim 6 wherein said viscosity modifier is removed following the dispersion step.
- 8. The compounding process of claim 7 wherein said viscosity modifier is a solvent.
- 9. The compounding process of claim 6 wherein said viscosity modifier is retained following the dispersion step.
- 10. The compounding process of claim 9 wherein said viscosity modifier is a reactive diluent that chemically reacts with said matrix material.
- 11. The compounding process of claim 1 further comprising adding one or more milling media to said stirred ball mill.
- 12. The compounding process of claim 1 wherein said filler comprises whiskers.
- 13. The compounding process of claim 1 wherein said filler comprises discontinuous fibers.
- 14. The compounding process of claim 1 wherein said filler comprises a particulate filler.
- 15. The compounding process of claim 1 wherein said filler comprises carbon fibrils.
- 16. The compounding process of claim 1 wherein said matrix material comprises a thermoset resin.
- 17. The compounding process of claim 16 wherein said thermoset resin is a phenolic, epoxy, thermosetting polyurethane, thermosetting polyester, polyimide, bismaleimide, polycyclopentadiene, or vinylacrylimide resin.
- 18. The compounding process of claim 1 wherein said matrix material comprises an elastomer.
- 19. The compounding process of claim 18 wherein said elastomer is styrene-butadiene rubber, natural rubber, ethylene-propylene-diene monomer rubber, silicone rubber, polybutadiene, polyisoprene, neoprene, chloroprene, fluoroelastomer, or a urethane elastomer.
- 20. The compounding process of claim 1 wherein said matrix material is in the form of a liquid.
- 21. The compounding process of claim 1 wherein said matrix material is a thermoplastic resin, said process further comprising cooling the contents of said stirred ball mill to a temperature at which said matrix material becomes brittle and maintaining said temperature throughout the dispersion step.
- 22. The compounding process of claim 1 wherein said matrix material is a thermoplastic or thermoset resin, said filler comprises carbon fibrils, and a viscosity modifier and milling media are added to said stirred ball mill.
Parent Case Info
This application is a continuation of application Ser. No. 07/386,912, filed Jul. 27, 1989, now abandoned.
US Referenced Citations (11)
Foreign Referenced Citations (1)
Number |
Date |
Country |
WO8707559 |
Dec 1987 |
WOX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
386912 |
Jul 1989 |
|