Abstract:
The present invention relates to a roller for use in electrophotographic development comprising a rigid substrate and a polymeric covering comprising metal 1,3 bis perfluoroalkyl (1,3 dioxopropane) mixed in a polymer.
Abstract:
The present invention relates to an improved toner composition comprising an improved particulate silica dispersing agent. The improved particulate silica is non-charging base treated fumed silica which has been treated with a base having a pH of 10 or greater.
Abstract:
The present invention relates to an improved toner composition for electrophotography comprising an improved polyaniline charge control agent.
Abstract:
A negative charge control agent in which the cation of the negative charge control agent is a diammonium or triammonium cation has been found to provide improved charging capacity, along with increased resin compatibility when used in toner compositions.
Abstract:
An electrochromic display device has a polymer film on the display electrode. In the writing step the polymer film on the display electrode is oxidized to a colored, non-transparent form. In the erasing step the polymer film is reduced to a neutral transparent form. A film of polyaniline is used in a preferred embodiment. A film of polypyrrole is used in another embodiment.
Abstract:
The present invention relates to toner compositions containing a negative charge-enhancing additive useful for developing latent electrostatic images to visible images.