Use of perylene pigments for photoelectrophoretic imaging
US4431721A · kind A · utility
3Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1982 |
| Grant date | Feb 14, 1984 |
| Priority date | — |
| Expiry date | Jun 21, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B5/62
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.