Bis aryl-azo derivatives of 2,3-naphthalenediol and electrophotographic liquid developer compositions containing them
US4414320A · kind A · utility
4Cited by
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Key dates
| Filing date | Jan 31, 1983 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | Jan 31, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/122
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Novel 1,4-bis aryl-azo derivatives of 2,3-naphthalenediol in which the aryl groups are substituted with alkoxy and with sulfonamide or fluorosulfonyl groups. These compounds are useful as neutral density pigments in electrophotographic developers and have good light stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.