Bis aryl-azo derivatives of 2,3-naphthalenediol
US4414152A · kind A · utility
40Cited by
6References
3Claims
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Key dates
| Filing date | May 18, 1981 |
| Grant date | Nov 8, 1983 |
| Priority date | — |
| Expiry date | May 18, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/122
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Bis aryl-azo compounds of the formula ##STR1## wherein R.sup.1 is lower alkyl and R.sup.2 is fluoro or amino. The 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.