Photoconductor overcoat having tetrafunctional radical polymerizable charge transport molecule

摘要

An improved overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a charge transport molecule containing four radical polymerizable functional groups of the general structure exemplified below:;
where R1 and R2 contain a spacer group and a radical polymerizable functional group, R3 and R4 are selected from the group consisting of a radical polymerizable functional group, a non-radical polymerizable functional group, and one each of a radical polymerizable functional group and a non-radial polymerizable functional group, and R5 and R6 contain a spacer group and a radical polymerizable functional group. The curable composition also contains at least one curing agent. The curing agent comprises a urethane resin containing six radical polymerizable functional groups. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and extending its service life.

主权项

1. An overcoat layer for an organic photoconductor drum, comprising a curable composition including:
about 20 to about 80 percent by weight of a charge transport molecule containing four radical polymerizable functional groups as exemplified below:where R1 and R2 contain a spacer group and a radical polymerizable functional group, R3 and R4 are selected from the group consisting of a radical polymerizable functional group, a non-radical polymerizable functional group, and one each of a radical polymerizable functional group and a non-radial polymerizable functional group, and R5 and R6 contain a spacer group and a radical polymerizable functional group; and
about 20 to about 80 percent by weight of a curing agent having a urethane resin containing six radical polymerizable functional groups, wherein the radical polymerizable functional group of R1 and R2 is an acrylate group.