Patent ID: 6506530
Filing Date: 2003-01-14
Classification: G03G

Abstract:
A toner comprising:a coloring agent; a binder resin comprising a first binder resin and a second binder resin, the first binder resin comprising a linear polyester resin consisting of polymerized divalent acid monomers and dihydric alcohol monomers and having a number-average molecular weight (Mn) of from 2,800 to 7,000, a weight-average molecular weight (Mw) of from 8,900 to 21,000, and a Mw/Mn ratio of 2 to 4, the second binder resin comprising a non-linear polyester resin having a number-average molecular weight (Mn) of from 3,500 to 8,000, a weight-average molecular weight (Mw) of from 40,000 to 120,000, and a Mw/Mn ratio of 10 to 20, and a ratio of the first binder resin to the second binder resin (the first binder resin:the second binder resin) being 60:40 to 95:5 by weight.