Electrically conductive fiber filled elastomeric foam
First Claim
1. An electrically conductive elastomeric foam comprising:
- an elastomeric foam;
electrically conductive PAN fibers carbonized at least 99% dispersed within said foam, said fibers being present in an amount effective to render said elastomeric foam electrically conductive, such that the volume resistivity of said electrically conductive foam is less th an 1×
106 ohm-cm.
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Accused Products
Abstract
An electrically conductive elastomeric foam is presented. Preferably, the elastomeric foam comprises polyurethane foam and in accordance with an important feature of this invention, the elastomeric foam is rendered electrically conductive by incorporating therein electrically conductive fibers. As used herein, a "fiber" has a diameter greater than or equal to one micron, and an aspect ratio (length/diameter) greater than or equal to fifteen. In accordance with the method of the present invention, the elastomeric foam is prepared from a polyurethane stock comprised of a polyhydroxyl compound, an organic polyisocyanate compound, a catalyst, a foam stabilizer and an amount of electrically conductive fiber which is effective to render the elastomeric foam electrically conductive. The conductive foam of this invention finds particular utility in the manufacture of conductive soling in footwear, conductive rollers and the like for use in electrophotographic equipment as well as in electrostatic dissipative and EMI/RFI shielding applications.
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Citations
29 Claims
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1. An electrically conductive elastomeric foam comprising:
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an elastomeric foam; electrically conductive PAN fibers carbonized at least 99% dispersed within said foam, said fibers being present in an amount effective to render said elastomeric foam electrically conductive, such that the volume resistivity of said electrically conductive foam is less th an 1×
106 ohm-cm. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 15, 16, 17, 18, 19, 20, 25, 26)
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10. An electrically conductive elastomeric foam comprising:
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an elastomeric foam; electrically conductive fibers dispersed within said foam, wherein said electrically conductive fibers are selected from the group consisting of electrically conductive metals, and glass, ceramic and polymeric fibers rendered electrically conductive by coating with electrically conductive materials, said fibers being present in an amount effective to render said elastomeric foam electrically conductive such that the volume resistivity of said electrically conductive foam is less than 1×
106 ohm-cm; andat least one coupling agent for improving the dispersion of said fibers in said foam, said coupling agent being selected from the group consisting of silanes, titanates, and zirconates. - View Dependent Claims (11, 13, 14, 21, 22, 23, 24)
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12. An electrically conductive elastomeric foam comprising:
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an elastomeric polyurethane foam; electrically conductive PAN carbon fibers dispersed within said foam, wherein said fibers are carbonized at least 99%, and further wherein said fibers are present in an amount effective to render said elastomeric foam electrically conductive such that the volume resistivity of said electrically conductive foam is less than 1×
106 ohm-cm; andat least one dispersing agent for improving the dispersion of said fibers in said foam.
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27. An electrically conductive article, comprising:
an elastomeric polyurethane foam containing electrically conductive PAN fibers carbonized at least 99% in an amount effective to render said elastomeric foam electrically conductive. - View Dependent Claims (28)
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29. An electrically conductive elastomeric foam comprising:
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a polyurethane foam; electrically conductive PAN fibers carbonized at least 99% dispersed within said foam, said fibers being in an amount effective to render said elastomeric foam electrically conductive; and at least one dispersing agent for improving the dispersion of asid fibers in said foam.
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Specification