Polyurethane roller with high surface resistance
AssigneeLexmark International, Inc.
InventorsRonald Lloyd Roe, Edward Wayne Weidert
Life of this patent
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Abstract
A roller for electrophotography is made from a mixture of polyurethane, polydiene, polyether diol, a first conductive filler and a second conductive filler which catalyzes oxidation of the polydiene. The first conductive filler comprises hexahalogenated acetylacetonates. The roller has a very high outer surface electrical resistance from baking the roller to oxidize the polybutadiene. The charge roller is achieved at low production cost and functions well with charging by a DC potential and AC overlay.
Claims23
An endless electrophotographic member comprising a body formed from a mixture of polyurethane, polydiene, a first electrically conductive filler and a second electrically conductive filler, said second conductive filler catalyzing oxidation of said polydiene, said member having an outer surface of oxidized polydiene, wherein the first conductive filler is selected from the group consisting of cesium, hexafluoroacetylacetonate, calcium hexafluoroacetylacetonate, and ferric hexafluoroacetylacetonate and the second conductive filler is selected from the group consisting of ferric chloride, ferrous chloride, calcium chloride, and cobalt hexafluoroacetylacetonate.
An endless electrophotographic member comprising a body of polymerized product of polyisocyanate and polyether polyol, polydiene, a first electrically conductive filler and a second electrically conductive filler, said second conductive filler catalyzing oxidation of the polydiene, said member having an outer surface of oxidized polydiene, wherein the first conductive filler is selected from the group consisting of cesium, hexafluoroacetylacetonate, calcium hexafluoroacetylacetonate, and ferric hexafluoroacetylacetonate and the second conductive filler is selected from the group consisting of ferric chloride, ferrous chloride, calcium chloride, and cobalt hexafluoroacetylacetonate.
An endless electrophotographic member comprising a body formed from a mixture of polycaprolactone ester toluene polyurethane, polybutadiene, cesium hexafluoroacetylacetonate and ferric chloride, which catalyzes oxidation of said polybutadiene, wherein said member has an outer surface of oxidized polybutadiene.
Dependencies are inferred from the claim text.