Amine-Free Dispersion-Based Squarylium Photoconductors
Original Publication Date: 1988-Jan-01
Included in the Prior Art Database: 2005-Feb-14
Photoconductors are described which utilize squarylium-based charge generation layers without the use of amine solvents. The photoconductors consist of an aluminized polyester base having a barrier layer and a sublayer overcoated with a charge generation layer containing squarylium dyes dispersed in polymer systems, such as M-60* polycarbonate/THF or an ELVACITE**/toluene in a polymer/dye ratio of about 3/1. As an example, the generation layer is prepared in an eight-ounce glass jar half filled with 3/16 inch stainless steel balls; 3.0 g. ELVACITE, 1.2 g. hydroxysquarylium dye and 70 g. toluene were added and the sealed jar was rolled on a mill for four hours. The mixture was coated onto aluminized polyester previously coated with a barrier layer and a sublayer.