Abstract: An electrophotographic imaging member including a supporting substrate, a charge blocking layer, an imaging layer including at least one photoconductive layer, the blocking layer including an uncrosslinked copolymer derived from vinyl hydroxy ester or vinyl hydroxy amide repeat units chemically modified at a nucleophilic hydroxyl group by a monofunctional electrophile, the copolymer having a number average molecular weight of at least about 10,000.

Abstract: Disclosed is an ink jet ink composition comprising a liquid vehicle such as water or ethanol, a dye, and a linear N-hydroxyl substituted polyethyleneimine polymer. In a preferred embodiment, the linear N-hydroxyl substituted polyethyleneimine polymer is selected from the group consisting of linear poly(N-hydroxyethylethyleneimine), linear poly(N-hydroxypropylethyleneimine), and linear poly(N-hydroxymethylethyleneimine). Also disclosed is a process for generating images with the disclosed inks in ink jet printing processes, including continuous stream ink jet printing processes. Further, a process for preparing the linear N-hydroxyl substituted polyethyleneimine polymers included in the inks of the present invention is also disclosed.