Patent ID: 6015647
Filing Date: 2000-01-18
Classification: G03G

Abstract:
A toner for developing an electrostatic image, comprising toner particles containing at least a binder resin, a colorant and a wax composition; whereinthe wax composition comprises an ester wax (1) having a long-chain alkyl group, and a wax (2); said wax (2) showing a maximum heat-absorption peak in a range of 40-130.degree. C. on temperature increase on a DSC (differential scanning calorimeter) curve, and giving a .sup.13 C-NMR (nuclear magnetic resonance) spectrum showing a total peak area S in a range of 0-50 ppm, a total peak area S1 in a range of 36-42 ppm, and a total peak area S2 in a range of 10-17 ppm, satisfying:1.0.ltoreq.(S1/S).times.100.ltoreq.10,1.5.ltoreq.(S2/S).times.100.ltoreq.15, andS.sub.1 <S.sub.2, andthe toner particles contain A wt. parts of the ester wax (1), B wt. parts of the wax (2) and C wt. parts of the colorant, respectively per 100 wt. parts of the binder resin, satisfying:3.ltoreq.A.ltoreq.30,0.2.ltoreq.B.ltoreq.10,4.ltoreq.A+B.ltoreq.40,0.02.ltoreq.B/A.ltoreq.0.5, and0.02.ltoreq.B/C.ltoreq.2.