Bis aryl-azo derivatives of 2,3-naphthalenediol

Details Bis aryl-azo derivatives of 2,3-naphthalenediol Bis aryl-azo derivatives of 2,3-naphthalenediol

1981-05-18

1983-11-08

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260174, 260177, 260178, 260186, 260191, 106288Q, 430114, 564 86, 564177, C09B 3102, C09B 31068, C09B 33048, D06P 144

Patent

active

044141521

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.

REFERENCES:
patent: 603903 (1898-04-01), Steinike et al.
patent: 2497246 (1950-02-01), von Glahn
patent: 3077042 (1963-02-01), Blout et al.
patent: 4047944 (1977-09-01), Rossi et al.
patent: 4145299 (1979-03-01), Ford et al.
patent: 4247459 (1981-01-01), Ford et al.

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