Toner compositions containing polyanhydride resins

Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – To produce color reproduction

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430106, 430109, 430110, G03G 908, G03G 910

Patent

active

044421893

ABSTRACT:
This invention is generally directed to dry negatively charged toner compositions comprised of resin particles, pigment particles and a polyanhydride charge enhancing composition of the formula: ##STR1## wherein R is an alkyl group containing from about 6 carbon atoms to about 22 carbon atoms, and n is a number ranging from about 5 to about 2,000.

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patent: 3869397 (1975-03-01), Tellier
patent: 3884825 (1975-05-01), Lindblad et al.
patent: 4073739 (1978-02-01), Peters
patent: 4264699 (1981-04-01), Tsubuko et al.
patent: 4298672 (1981-11-01), Lu
patent: 4338390 (1982-07-01), Lu
patent: 4403027 (1983-09-01), Ishikawa et al.

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