TONER COMPOSITION FOR USE IN THE DEVELOPING OF ELECTROSTATIC CHARGE PATTERNS

TONER COMPOSITION FOR USE IN THE DEVELOPING OF ELECTROSTATIC CHARGE PATTERNS

A composition of matter for use in the developing of electrostatic charge patterns, wherein said composition is in the form of toner particles that have a net positive charge and contain a thermoplastic resin binder for a salt formed from a nigrosine base and at least one carboxylic acid containing...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: DE ROO, PIERRE RICHARD, TAVERNIER, SERGE MARTIN
Format: Patent
Sprache:eng
Schlagworte:
CINEMATOGRAPHY
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
HOLOGRAPHY
MAGNETOGRAPHY
PHOTOGRAPHY
PHYSICS
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Beschreibung
Zusammenfassung:A composition of matter for use in the developing of electrostatic charge patterns, wherein said composition is in the form of toner particles that have a net positive charge and contain a thermoplastic resin binder for 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, characterized in that said nigrosine salt is dispersed in a thermoplastic resin binder containing a polyester derived from fumaric acid or a mixture of fumaric acid and isophthalic acid wherein the fumaric acid represents at least 95 mole % of the acids and a polyol blend of propoxylated bisphenol.