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CHARGE GENERATOR LAYERS CONTAINING SELENIUM DISPERSED IN PHENOXY RESINS

IP.com Disclosure Number: IPCOM000026106D
Original Publication Date: 1990-Apr-30
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 106K

Publishing Venue

Xerox Disclosure Journal

Abstract

Multilayered photoreceptors contain a charge generator layer and a charge transport layer. Charge generator layer coating formulations composed of selenium dispersions in solutions of neutral andlor acidic polymers emit noxious odors that are especially unpleasant when the coatings are dried at elevated temperatures. One of the polymer solvent systems that givesoff some of the most noxious odors when used to mill elemental selenium into dispersions is phenoxy dissolved in blends of acetone and cyclohexanone. The odors given off are similar to those for sulfur compounds.

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XEROX DISCLOSURE JOURNAL

CHARGE GENERATOR LAYERS Proposed Classification CONTAINING SELENIUM DIS- U.S. C1.430/135 PERSED IN PHENOXY RESINS
5/00 Int. Robert A. McNamara C1. G03g

Multilayered photoreceptors contain a charge generator layer and a charge transport layer. Charge generator layer coating formulations composed of selenium dispersions in solutions of neutral andlor acidic polymers emit noxious odors that are especially unpleasant when the coatings are dried at elevated temperatures. One of the polymer solvent systems that givesoff some of the most noxious odors when used to mill elemental selenium into dispersions is phenoxy dissolved in blends of acetone and cyclohexanone. The odors given off are similar to those for sulfur compounds.

A process has now been discovered for preventing the formation of noxious seleniferous compounds by the addition alkaline organic liquids to seleniudphenoxy generator layer coating formulae and/or selenium in combination with other neutral or acidic polymers. With the addition of organic liquids such as N-methyl-2-pyrrolidone, pyrrole, N-ethyl-2- pyrrolidone, methyl pyrrole, pyrrolidine, methyl pyrrolidine, and the like, the seleniferous compounds responsible for noxious odors are inhibited from forming. The preferred liquids for this purpose are N-methyl-2-pyrrolidone pyrrole, and methyl pyrrole. Since the generator layer coating formulae are in non aqueous media, it is not possible to measure the aIkalinity that could be expressed in pH values if the systems were aqueous. A series of seleniudphenoxy generator layer coating compositions were made up with a modified water dispersible phenoxy and the pH values ranged from pH 7 to pH
10.2 that were adjusted with ammonium hydroxide...