Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1977-11-10
1982-04-06
Welsh, John D.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430115, 430528, 260DIG20, G03G 908
Patent
active
043236340
ABSTRACT:
The present invention relates to the use of low levels of quaternary ammonium salt surfactants as charge control agents for an electrostatic toner contained in dry electrographic developer compositions. Particularly useful such charge control agents are those which contain at least one amido group having 10 or more carbon atoms attached to the ammonium cation and an anion selected from a halide ion or an organosulfur-containing anion.
REFERENCES:
patent: 2626876 (1953-01-01), Carnes
patent: 3060051 (1962-10-01), Johnson
patent: 3431412 (1969-03-01), Okubo et al.
patent: 3729418 (1973-04-01), Machida et al.
Eastman Kodak Company
French William T.
Welsh John D.
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