Liquid developer and charge control substance suitable therefor

Details Liquid developer and charge control substance suitable therefor Liquid developer and charge control substance suitable therefor

1985-06-12

1986-06-10

Martin, Roland E.

Radiation imagery chemistry: process, composition, or product th

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

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

G03G 912

Patent

active

045943052

ABSTRACT:
A liquid developer and a charge control substance for developing positively charged electrostatic charge images. The developer comprises an electrically insulating carrier liquid having a high resistance and a low dielectric constant and which contains a pigment or dye, a resinous binder, the charge control substance and conventional additives in dispersion or solution. The charge control substance is a negative-controlling graft copolymer soluble in an aliphatic hydrocarbon and is obtained by grafting a carboxylic acid N-alkenylamide onto polymers soluble in aliphatic hydrocarbons used as the carrier liquid. The carboxylic acid N-alkenylamide is a compound of the formula: ##STR1## in which R is hydrogen or C.sub.1 -C.sub.3 alkyl,

REFERENCES:
patent: 3542682 (1970-11-01), Mutaffis
patent: 3844966 (1974-10-01), Nelson
patent: 4423736 (1981-01-01), Herrmann

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