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US 5,629,418 : Preparation of titanyl fluorophthalocyanines

 

Inventors:
Molaire, Michel F. (Rochester, NY)
Kaeding, Jeanne E. (Rochester, NY)
Gruenbaum, William T. (Rochester, NY) 
Assignee:
Eastman Kodak Company (Rochester, NY) 
 

Titanyl fluorophthalocyanines, and electrophotographic elements, and a method for preparing titanyl fluorophthalocyanine having the steps of: dissolving titanyl fluorophthalocyanine in acid to form a solution; admixing the solution and water to precipitate out amorphous titanyl fluorophthalocyanine; washing the amorphous titanyl fluorophthalocyanine until substantially all of the acid is removed; and retaining the amorphous titanyl fluorophthalocyanine under ambient conditions of wetness/dryness and temperature exclusive of conditions combining both dryness and a temperature of greater than about 50° C.

http://www.freepatentsonline.com/5629418.pdf

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