| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the generation of striped image unevenness without being fused to a feed roller, a layer regulating member and a toner carrier by containing polyester resin containing a urethane cross-linking component, and a specific compound. SOLUTION: A minus charging toner contains polyester resin containing a urethane cross-linking component, and a compound expressed by a formula. In the formula, X1 and X2 independently represent hydrogen atom, low alkyl group, low alkoxy group, nitro group or halogen atom, and X1 and X2 can be the same or different; (m) and m' independently represent integers of 1-3; R1 and R3 independently represent hydrogen atom, alkyl, alkenyl, sulfonated amide, mesyl, sulfonic acid, carboxy ester, hydroxy groups of C1-18, alkoxy, acetylamino, benzoylamino groups of C1-18 or halogen atom, and R1 and R3 can be the same or different; (n) and n' independently represent integers of 1-3; R2 and R4 represent hydrogen atom or nitro group; and A+ represents hydrogen ion, sodium ion, potassium ion or ammonium ion.</p> |
