POSITIVELY CHARGED TYPE TONER COMPOSITION

PURPOSE: To enable use in an electrostatic photographic image forming device without using silicone oil as a peeling liq. by incorporating one or more kinds of vinyl copolymers each having mol.wt. peaks in specified mol.wt. regions, low mol.wt. wax, pigment particles and an electrostatic charge acce...

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Bibliographische Detailangaben
Hauptverfasser: ROBAATO JIYON GURUUBAA, ROBAATO EI NERUSON
Format: Patent
Sprache:eng
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Zusammenfassung:PURPOSE: To enable use in an electrostatic photographic image forming device without using silicone oil as a peeling liq. by incorporating one or more kinds of vinyl copolymers each having mol.wt. peaks in specified mol.wt. regions, low mol.wt. wax, pigment particles and an electrostatic charge accelerating additive. CONSTITUTION: This toner compsn. contains at least one kind of copolymer having mol.wt. peaks in the mol.wt. regions of 5×10 -8×10 and 10 -2×10 at the time of measurement by gel permeation chromatography, low mol.wt. wax, pigment particles and an electrostatic charge accelerating additive selected from among alkylpyridinium halides, org. sulfates and sulfonates. This compsn. can be used in an electrostatic photographic image forming device without requiring an anti-offsetting liq. such as silicone oil.