RESIN COMPOSITION FOR TONER AND METHOD FOR PRODUCING RESIN COMPOSITION FOR TONER

摘要

Disclosed is a resin composition for toners which enables to obtain a toner having excellent low-temperature fixability and high-temperature offset resistance. Also disclosed is a toner. Specifically disclosed is a resin composition for toners, which is obtained by reacting a mixture of a branched polyester (A) having a number average molecular weight of 2000-7000 and a hydroxyl number of 20-80 and a low molecular weight linear polyester (B) having a number average molecular weight of 2000-5000 and a hydroxyl number of 20-55 with an isocyanate compound having two or more isocyanate groups in one molecule. The resin composition for toners contains a crosslinked structure of the branched polyester (A), a structure wherein the branched polyester (A) and the low molecular weight linear polyester (B) are bonded by the isocyanate compound, and an unreacted portion of the low molecular weight linear polyester (B).