C - Chemistry – Metallurgy – 09 – B
Patent
C - Chemistry, Metallurgy
09
B
C09B 47/04 (2006.01) C30B 7/00 (2006.01) C30B 29/54 (2006.01) B01D 9/02 (2006.01)
Patent
CA 2619554
Processes for making photosensitive organic pigments for use in imaging members, specifically processes for making a photosensitive phthalocyanine pigments having a specific crystal form, comprising dissolving the pigment in a mixture of a haloacetic acid and alkylene halide to form a solution, precipitating the pigment by adding the solution to a non-solvent system, the solution comprised of one or more organic solvents and a small amount of water, wherein the amount of water controls the crystal form of the pigment, followed by a treatment with a halobenzene to obtain a highly photosensitive second crystal form of the pigment.
Divulgation de procédés pour produire des pigments organiques photosensibles devant servir pour des éléments d'imagerie, spécifiquement des procédés pour produire un pigment de phtalocyanine photosensible ayant une forme cristalline spécifique. Ces procédés comprennent la dissolution du pigment dans un mélange d'un acide haloacétique et d'halogénure d'alkylène pour former une solution, la précipitation du pigment en ajoutant cette solution à un système sans solvant, la solution comporte un ou plusieurs solvants organiques et une petite quantité d'eau, la quantité d'eau permettant de contrôler la forme cristalline du pigment, puis un traitement avec un halobenzène pour obtenir une seconde forme cristalline du pigment hautement photosensible.
Gardner Sandra J.
Liebermann George
Saban Marko D.
Vong Cuong
Sim & Mcburney
Xerox Corporation
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