NEGATIVE CHARGING TYPE CHARGE CONTROL AGENT AND NEGATIVE CHARGING TONER

摘要

PPROBLEM TO BE SOLVED: To provide a negative charging type charge control agent and a negative charging toner, in which the decrease in the charging properties at high temperature and high humidity environment is prevented. PSOLUTION: The negative charging type charge control agent contains 0.1 to 20 parts by mass of zeolite mixed into 100 parts by mass of a charge control resin having a sulfonic acid group as a substituent. In the negative charging type charge controlling agent, the charge control resin having a sulfonic acid group as a substituent preferably contains 0.1 to 30 mass% of an acrylamide sulfonic acid unit or an acrylamide sulfonate unit, or contains 0.1 to 30 mass% of a styrene sulfonate unit. The negative charging toner contains 0.1 to 30 parts by mass of the above negative charging type charge control agent, with respect to 100 parts by mass of a binder. PCOPYRIGHT: (C)2005,JPO&NCIPI