Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1982-10-14
1984-07-17
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...
430126, G03G 910
Patent
active
044606729
ABSTRACT:
This invention is generally directed to an improved positively charged dry electrostatic toner composition comprised of resin particles, pigment particles, a low molecular weight waxy material having a molecular weight of from 500 to about 20,000, and from about 0.5 percent to about 10 percent by weight of a charge enhancing additive selected from the group consisting of alkyl pyridinium halides, organic sulfonate compositions and organic sulfate compositions, of the following formulas: ##STR1## wherein R is a hydrocarbon group containing about 8 to about 22 carbon atoms, and A is an anion, and ##STR2## wherein R.sub.1 is an alkyl group containing from about 12 carbon atoms to about 22 carbon atoms, R.sub.2 and R.sub.3 are independently selected from alkyl groups containing from about 1 carbon atom to about 5 carbon atoms, R.sub.4 is an alkylene group containing from about 1 carbon atom to about 5 carbon atoms, R.sub.5 is a tolyl group or an alkyl group containing from about 1 carbon atom to about 3 carbon atoms, and n is the number 3 or 4.
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patent: 3951835 (1976-04-01), Tomono et al.
patent: 4100087 (1978-07-01), Takayama et al.
Bolte Steven B.
Gruber Robert J.
Julien Paul C.
Koch Ronald J.
Palazzo E. O.
Welsh John D.
Xerox Corporation
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