Use of perylene pigments for photoelectrophoretic imaging

Details Use of perylene pigments for photoelectrophoretic imaging Use of perylene pigments for photoelectrophoretic imaging

1982-06-21

1984-02-14

Welsh, John D.

Radiation imagery chemistry: process, composition, or product th

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

Electrophoretic imaging, process, composition, or product

430 73, 430 76, G03G 1322

Patent

active

044317212

ABSTRACT:
A photoelectrophoretic imaging process, wherein a suspension of photosensitive pigment particles between two electrodes, at least one of which is transparent, is subjected to the influence of an electric field and exposed to an image, which process comprises using, as photosensitive pigment, a perylenetetracarboxylic acid diimide of the formula ##STR1## wherein R.sub.1 and R.sub.2 are aliphatic, cycloaliphatic, aromatic or heterocyclic radicals.
The pigments used in this invention are distinguished by particularly good photoelectrophoretic sensitivity and low fog density.

REFERENCES:
patent: 3383993 (1968-05-01), Yeh
patent: 3546085 (1970-12-01), Weinberger et al.
patent: 3560360 (1971-02-01), Carriera et al.
patent: 3871882 (1975-03-01), Wiedemann
patent: 3904407 (1975-09-01), Regensburger et al.
patent: 3922169 (1975-11-01), Bergfjord et al.

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