Phthalocyanine crystal, process for manufacture thereof and its

Details Phthalocyanine crystal, process for manufacture thereof and its Phthalocyanine crystal, process for manufacture thereof and its

1990-08-13

1991-04-16

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

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

Radiation-sensitive composition or product

430 58, G03G 506

Patent

active

050081730

ABSTRACT:
A new crystal form of a titanyl phthalocyanine compound is provided. This crystal form shows characteristic strong absorption peaks at 1,332.+-.2 cm.sup.-1, 1,074.+-.2 cm.sup.-1, 962.+-.2 cm.sup.-1 and 783.+-.2 cm.sup.-1 in an infrared absorption spectrum and/or characteristic strong peaks at 27.2.degree., 9.7.degree. and 24.1.degree. of Bragg's angle 2.theta. in an X-ray diffraction spectrum and has very good dispersibility and stability in a solvent and also very good photoelectric conversion efficiency and so is very useful particularly as a charge generation agent highly sensitive in a semiconductor laser wavelength region as required in a photosensitive material for a highspeed high-definition printer. Such crystal form can be obtained by treating non-crystalline titanyl phthalocyanine with tetrahydrofuran.

REFERENCES:
patent: 2524672 (1950-10-01), Lecher et al.
patent: 2770629 (1956-11-01), Eastes
patent: 3160635 (1964-12-01), Knudsen et al.
patent: 3357989 (1967-12-01), Byrne et al.
patent: 4800145 (1989-01-01), Nelson et al.

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