Crystalline organic pigment sensitizers for photoconductive layers
US4018607A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 3, 1974 |
| Grant date | Apr 19, 1977 |
| Priority date | — |
| Expiry date | May 3, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G5/0677
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A specific class of crystalline organic pigments having the formula ##STR1## WHEREIN N IS 1 OR 2; X consists of the atoms necessary to complete a naphthalene, anthracene, or ##STR2## R.sup.1, R.sup.2, and R.sup.3 are independently selected from the group consisting of hydrogen, halogen, alkoxy, NO.sub.2, alkyl, SO.sub.3 H or alkali metal salts thereof, and COOH or alkali metal salts thereof; and wherein R.sup.2 and R.sup.3 can comprise the atoms necessary to complete a phenyl, naphthyl or anthryl ring; and R is selected from the group consisting of ##STR3## or COOM wherein M is alkyl or an alkali or alkaline earth metal is useful as sensitizers for photoconductive compositions in electrophotographic processes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.