Method using positively charged electrophotographic toner contai

Details Method using positively charged electrophotographic toner contai Method using positively charged electrophotographic toner contai

1979-10-01

1981-03-17

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...

430110, 430115, 430109, 430108, 430529, 260DIG16, G03G 1309

Patent

active

042568242

ABSTRACT:
Disclosed are positively charged toner compositions comprised of a thermoplastic resin, a pigment or colorant, and a charge inducing additive containing an amido dialkyl hydroxy ammonium compound of the formula: ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are independently selected from hydrocarbon radicals containing up to 22 carbon atoms; and more specifically R.sub.1 and R.sub.2 are hydrocarbon radicals containing from 1 carbon atom to about 8 carbon atoms, R.sub.3 is a hydrocarbon radical containing from about 8 carbon atoms to about 22 carbon atoms; R.sub.4 and R.sub.5 are independently selected from alkylene radicals having up to 8 carbon atoms, and preferably from 1 carbon atom to about 5 carbon atoms; and A is an anion such as nitrate, dihydrogen phosphate, methyl hydrogen phosphate, and dimethyl phosphate. Developers containing these positively charged toner materials are prepared by adding carrier materials thereto. These developers can then be employed in an electrophotographic imaging system particularly those systems using organic photoreceptors such as polyvinylcarbazole which are charged negatively.

REFERENCES:
patent: 3850642 (1974-11-01), Bailey
patent: 3893935 (1975-07-01), Ja dwin

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