Electrostatic toner comprising thermoplastic resin binder for ni

Details Electrostatic toner comprising thermoplastic resin binder for ni Electrostatic toner comprising thermoplastic resin binder for ni

1984-04-11

1985-06-25

Kittle, John E.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

430106, 430107, G03G 910, G03G 914, G03G 912

Patent

active

045254451

ABSTRACT:
A particulate composition of matter for magnetic brush development of electrostatic charge patterns, adapted upon mixing with magnetic carrier particles to acquire a net positive charge, which contains colorant material and thermoplastic resin binder, the colorant material comprising a salt formed from a nigrosine base and at least one carboxylic acid containing one or two carboxylic acid groups and having from 2 to 26 carbon atoms, wherein the nigrosine salt is dispersed as particles in the thermoplastic resin binder which contains a polyester derived from fumaric acid or a mixture of at least 95 mol % fumaric acid and the balance isophthalic acid and a polyol blend of propoxylated bisphenol. The charge pattern is developed by contacting the same under the influence of an applied magnetic field with a mixture of magnetic carrier particles and the particulate composition.

REFERENCES:
patent: 2618552 (1952-11-01), Wise
patent: 3647696 (1972-03-01), Olson
patent: 3985664 (1976-10-01), Sakaguchi et al.
patent: 4142982 (1979-03-01), Yamakami et al.
patent: 4271249 (1981-06-01), Gilliams et al.
patent: 4331755 (1982-05-01), Gilliams et al.

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