Process for preparing purified hydroxymetal phthalocyanine and e

Details Process for preparing purified hydroxymetal phthalocyanine and e Process for preparing purified hydroxymetal phthalocyanine and e

1993-06-14

1995-10-31

Rizzo, Nicholas

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540140, C09B 6712

Patent

active

054630410

ABSTRACT:
A process for preparing a purified hydroxymetal phthalocyanine with stable charging characteristics and small dark decay and an electrophotographic photoreceptor containing the same are disclosed. The process comprises dissolving or slurrying a precursor of a hydroxymetal phthalocyanine in an acid, precipitating a hydroxymetal phthalocyanine in a solvent or a basic solution, and heat treating the resulting hydroxymetal phthalocyanine in a basic solution. The purified hydroxymetal phthalocyanine wherein the metal is gallium is further subjected to a solvent treatment to provide a new crystal showing further improved electrophotographic characteristics.

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patent: 5059355 (1991-10-01), Ono et al.
patent: 5302479 (1994-04-01), Daimon et al.

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