Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1990-07-31
1991-08-20
Welsh, David
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Post imaging process, finishing, or perfecting composition...
430106, 430115, 546 13, G03G 910, G03G 908
Patent
active
050416251
ABSTRACT:
New electrostatographic toners and developers are provided containing new charge-control agents comprising N,N'-substitutedbis(pyridinium) salts having the structure: ##STR1## wherein R is alkylene having from 1 to 20 carbon atoms or arylenedialkylene wherein each alkylene moiety has 1 to 6 carbon atoms and the arylene moiety has from 6 to 14 carbon atoms, R' and R", which are the same or different, represent hydrogen, a straight or branched chain alkyl or alkoxy group having from 1 to 24 carbon atoms, aralkyl or alkaryl in which the alkyl group has 1 to 20 carbon atoms and the aryl group has from 6 to 14 carbon atoms, aryl having 6 to 14 carbon atoms which is unsubstituted or aryl having 6 to 14 carbon atoms which is substituted with one or more nitro, alkoxy or halo groups and X and X', which are the same or different, are chlorine, bromine, fluorine or iodine.
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Alexandrovich Peter S.
Wilson John C.
Eastman Kodak Company
Montgomery Willard G.
Rosasco S.
Welsh David
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