Methods for preparing cocrystals of titanyl fluorophthalocyanine

Details Methods for preparing cocrystals of titanyl fluorophthalocyanine Methods for preparing cocrystals of titanyl fluorophthalocyanine

1995-05-02

1997-03-25

Rodee, Christopher D.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Radiation-sensitive composition or product

540141, 2525011, 106411, 106412, G03G 506

Patent

active

056143427

ABSTRACT:
Cocrystallized titanyl phthalocyanine-titanyl fluorophthalocyanine compositions, preparation methods, and electrophotographic elements utilizing the compositions. The method has the steps of: admixing crude titanyl phthalocyanine and crude titanyl fluorophthalocyanine to provide a pigment mixture; increasing the amorphousness of the pigment mixture as determined by X-ray crystallography using X-radiation characteristic of Cu K.alpha. at a wavelength of 1.541 .ANG. of the Bragg angle 2.theta. to provide an amorphous pigment mixture; contacting the amorphous pigment mixture with organic solvent having a gamma.sub.c hydrogen bonding parameter of less than 8.0; and prior to the contacting, substantially excluding the amorphous pigment mixture from contact with organic solvent having a gamma.sub.c hydrogen bonding parameter greater than 9.0.

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