Patent ID: 7232636
Filing Date: 2007-06-19
Classification: G03G

Abstract:
1. A method for the formation of a pulverized toner composition for use in electrostatic image development, comprising the steps of: providing a homogeneous mixture comprised of a resin binder and a colorant, said resin binder comprising: (a) a high-softening point polyester having a softening point of greater than 120° C. and 160° C. or less; and (b) a low-softening point linear polyester having a softening point of 75° C. or more and 120° C. or less, each of the high-softening point polyester (a) and the low-softening point polyester (b) being obtained by polycondensing an alcohol component consisting essentially of at least one aliphatic diol with a carboxylic acid component, wherein a difference in the softening points between the high-softening point polyester (a) and the low softening-point polyester (b) is 10° C. or more, and melt-kneading, cooling, pulverizing said mixture and classifying said pulverized mixture.