Electrophotographic liquid developer for the reversal developmen

Details Electrophotographic liquid developer for the reversal developmen Electrophotographic liquid developer for the reversal developmen

1983-08-19

1985-02-05

Kittle, John E.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

430137, 430100, G03G 912

Patent

active

044978863

ABSTRACT:
An electrophotographic liquid developer is disclosed which is useful in the development of negatively charged charge images. The developer comprises an electrically insulating carrier liquid of high electrical resistivity and a low dielectric constant, a pigment or dye, a resinous binder, a charge controller comprising a copolymer of N-vinyl-2-pyrrolidone and a methacrylic acid ester, and a poly-N-vinyl-2-pyrrolidone which has been alkylated with an .alpha.-olefin. A process for producing the liquid developer is also disclosed.

REFERENCES:
patent: 3417054 (1968-12-01), Merijan et al.
patent: 3542681 (1970-11-01), Mutaffis
patent: 3674693 (1972-07-01), Averbach
patent: 4243736 (1981-01-01), Herrmann

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