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US 5,548,028 AGranted
Curable elastomeric blend with vulcanized fluoroelastomer
AssigneeE. I. Du Pont de Nemours and Company
InventorDavid L. Tabb
Life of this patent
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Abstract
Blends of previously-vulcanized fluoroelastomer with fluorine-free elastomer can be cured to have unexpectedly excellent physical properties.
Claims20
A curable elastomeric blend composition, consisting essentially of previously-vulcanized fluoroelastomer and uncured fluorine-free elastomer prepared by a process which comprises shredding or finely subdividing the previously vulcanized fluoroelastomer and blending the thus-treated fluoroelastomer with the uncured fluorine-free elastomer.
A curable elastomer composition prepared by a process which comprises
- a) shredding or finely subdividing a previously-vulcanized fluoroelastomer;
- and
- b) blending the thus-treated fluoroelastomer, an uncured fluorine-free elastomer, and a curing agent for the fluorine-free elastomer at a temperature below that necessary to effect cure of the fluorine-free elastomer to produce a curable elastomer composition consisting essentially of the previously-vulcanized fluoroelastomer and the uncured fluorine-free elastomer.
Dependencies are inferred from the claim text.