Processes for the preparation of phthalocyanines for electrophot

Details Processes for the preparation of phthalocyanines for electrophot Processes for the preparation of phthalocyanines for electrophot

1990-05-07

1992-03-31

Martin, Roland

Radiation imagery chemistry: process, composition, or product th

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

Process of making radiation-sensitive composition

540162, G03G 506

Patent

active

051007525

ABSTRACT:
A process for the preparation of x-metal free phthalocyanine which comprises (i) initially preparing a mixture of alpha- and x-metal free phthalocyanines from alpha-phthalocyanine with a grinding or mixing device, (ii) converting the above mixture to x-metal free phthalocyanine by the addition of an organic solvent, (iii) separating the x-metal free phthalocyanine therefrom, and thereafter washing the x-metal free phthalocyanine with a basic solution.

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patent: 3357989 (1967-12-01), Byrne et al.
patent: 3492309 (1970-01-01), Ossanna
patent: 3594163 (1971-07-01), Radler
patent: 3816118 (1974-06-01), Byrne
patent: 4426434 (1984-01-01), Arishima et al.
patent: 4443528 (1984-04-01), Tamura et al.
patent: 4814441 (1989-03-01), Hauser et al.

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