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US 4,390,609 AGranted
Electrophotographic recording material with abrasion resistant overcoat
AssigneeHoechst Aktiengesellschaft
InventorWolfgang Wiedemann
Life of this patent
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AssigneeHoechst Aktiengesellschaft
InventorWolfgang Wiedemann
Estimating the term…
An electrophotographic recording material comprising an electrically conductive support, an optional insulating intermediate layer, at least one photoconductive layer comprising a charge carrier generating compound and a charge transporting compound, and a protective transparent cover layer made from a surface abrasion resistant binder composed of a polyurethane resin, polycarbonate resin, phenoxy resin, polyacrylate or polymethacrylate resin, polyurethane formed from a two-component system comprising a polyisocyanate and a hydroxyl group containing polyester or polyether, a polyisocyanate and a hydroxyl group containing acrylic or epoxy resin, polyurethane formed from a one-component system comprising a polyisocyanate prepolymer, or a polyisocyanate having temporarily masked isocyanate groups.
An electrophotographic recording material comprising an electrically conductive support, a photoconductive layer containing at least one organic charge carrier generating compound and at least one organic charge transporting compound, and a protective transparent covering layer having a thickness in the range from about 0.5 to about 10 .mu.m and comprising a surface abrasion resistant subsequently crosslinkable material, said abrasion resistant material being a two-component system comprising a polyisocyanate selected from the group consisting of aliphatic polyisocyanates and aromatic polyisocyanates and a cross-linking, hydroxyl group containing compound selected from the group consisting of saturated polyesters, saturated polyethers, acrylic resins and epoxy resins.
An electrophotographic recording material comprising an electrically conductive support, a photoconductive layer containing at least one organic charge carrier generating compound and at least one organic charge transporting compound, and a protective transparent covering layer having a thickness in the range from about 0.5 to about 10 .mu.m and comprising a surface abrasion resistant subsequently crosslinkable material, wherein the covering layer comprises a self-crosslinking polyisocyanate and the photoconductive layer comprises a compound containing hydroxyl groups.
Dependencies are inferred from the claim text.