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US 4,414,152 AGranted
Bis aryl-azo derivatives of 2,3-naphthalenediol
AssigneeEastman Kodak Company
InventorsDomenic Santilli, Jeanne E. Kaeding, Louis J. Rossi
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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.
Claims3
A compound of the formula ##STR10## wherein R.sup.1 is lower alkyl and R.sup.2 is --F or ##STR11## wherein R.sup.3 and R.sup.4 are hydrogen, lower alkyl, phenyl, naphthyl, or phenyl or naphthyl substituted by lower alkyl and are the same or different.
Dependencies are inferred from the claim text.