Direct alpha to X phase conversion of metal-free phthalocyanine

Details Direct alpha to X phase conversion of metal-free phthalocyanine Direct alpha to X phase conversion of metal-free phthalocyanine

1973-06-04

1976-01-13

Moatz, Harry I.

Gas separation: apparatus

Magnetic separating means

2603145, 117 34, 117211, 117215, C09b 4708

Patent

active

039321800

ABSTRACT:
Process for direct alpha to X phase conversion of metal-free phthalocyanine. In this process, the alpha polymorph of a metal-free phthalocyanine pigment can be directly converted to the X form by depositing the alpha form of the pigment on a suitable substrate followed by in situ conversion of this deposit by controlled heating. The X form of metal-free phthalocyanine is known to possess good electrophotographic speed, and, thus, can be used either alone or in combination with other photoconductive materials in electrophotography.

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