CHARGE CONTROLLING AGENT AND TONER USING SAME

摘要

To provide a charge controlling agent for electrophotography, which presents sufficient triboelectric chargeability to a toner, is useful particularly for a color toner and further for a polymerized toner, increases a charge rising rate, has a high electric charge amount, is excellent in charging characteristics, stability over time and environmental stability and yet is safe without posing any problem regarding waste regulations, and a negatively chargeable toner for developing an electrostatic image, which uses such a charge controlling agent and which has a high charging performance. A charge controlling agent comprising, as an effective component, at least one type of cyclic phenol sulfide represented by the following formula (1), and a toner comprising such a charge controlling agent:;

主权项

1. A charge controlling agent comprising, as an effective component, at least one type of cyclic phenol sulfide represented by the following formula (1):wherein R1 is a hydrogen atom, a C1-8 linear or branched alkyl group which may have a substituent, a substituted or unsubstituted aromatic hydrocarbon group, or a substituted or unsubstituted condensed polycyclic aromatic group, R2 is a C1-8 linear or branched alkyl group which may have a substituent, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted condensed polycyclic aromatic group, m is an integer of from 4 to 9, and n is an integer of 0, 1 or 2, wherein the plurality of R1 present in one molecule, may be the same or different from one another, provided that at least one of them is a hydrogen atom but not all of them are hydrogen atoms.