Patent ID: 7267915

Claim:
A photoconductive element comprising: an electrically conductive support, a smoothing layer disposed over the support, an electrical barrier layer and disposed over the barrier layer a charge generation layer capable of generating positive charged carriers when exposed to actinic radiation, the barrier layer having an amorphous condensation polymer capable of transporting charge by electronic transport mechanisms, wherein the amorphous condensation polymer is comprised of a mixture of 40.08 g (0.1 moles) of 1,3,3-trimethylcyclohexanemethylenediammonium dodecanedioate, 7.45 g (0.020 moles) of 1,3,3-trimethylcyclohexanemethylenediammonium sebacate, 47.68 g (0.28 moles) of 1,3,3-trimethylcyclohexanemethylenediamine and 177.52 g (0.28 moles) of 1,4,5,8-naphthalenetetracarbonyl-bis(11-undecanoic acid)imide, the resulting condensation polymer being soluble in mixed solvents, having a glass transition temperature of 120° C. on a third heat and a melting temperature of 163° C. on a first heat that was not present on a second or subsequent heatings, and a weight average molecular weight of 178,000.