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US 7,452,642 B2Granted
Hole transportation polymers for photoreceptor devices
AssigneeXerox Corporation
InventorsYuhua Tong, John F. Yanus
Life of this patent
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Abstract
Hole transport polymers are disclosed. The polymers include modified triarylamine groups attached to a polymeric material such as, for example, poly(vinyl butyral). The polymers are particularly suited for use in multilayered photoreceptors. The polymers can be readily synthesized. Also disclosed are photoreceptors containing one or more layers that include the noted polymers.
Claims8
A photoreceptor comprising:
- a substrate;
- a charge generating layer disposed on the substrate;
- a hole transport layer disposed on the charge generating layer, the hole transport layer including a polymeric hole transport material having tritolylamine groups, the material selected from the group consisting of (i) poly(vinyl butyral) having tritolylamine groups, (ii) hydroxylethyl methacrylate having tritolylamine groups, and combinations thereof.
A photoreceptor comprising:
- a substrate;
- a charge generating layer disposed on the substrate;
- a hole transport layer disposed on the charge generating layer;
- and
- an optional overcoat layer disposed on the hole transport layer;
- wherein the hole transport layer includes a polymeric hole transport material made by the process of:
- providing a triarylamine having an aldehyde functional group;
- providing Meldrum's acid;
- reacting effective amounts of the triarylamine with the Meldrum's acid to form a reactive intermediate;
- providing a polymer containing hydroxyl groups;
- reacting effective amounts of the reactive intermediate and the polymer containing hydroxyl groups to produce the polymeric hole transport material.
8 more elements
Dependencies are inferred from the claim text.