Patent ID: 7524603
Filing Date: 2009-04-28
Classification: C08G,G03G

Abstract:
1. A binder resin for an electrostatic image developing toner, obtained by a polycondensation reaction of a polycarboxylic acid and a polyol, wherein the polycarboxylic acid comprises a compound represented by at least one of formula (1) and formula (2) in an amount of from about 50 to about 100 mol %; the polyol comprises a compound represented by formula (3) in an amount of from about 10 to about 100 mol %; and a content of a catalyst-originated metal element in the binder resin is about 100 ppm or less: wherein A B R m and l each independently represents an integer satisfying 1≦m+l≦12; and n represents an integer satisfying 1≦n≦3; wherein A B R p, q and r each independently represents an integer satisfying 0≦p≦6, 0≦r≦6 and 1≦q≦3, respectively; wherein X represents an alkylene oxide group; Y represents SO h and k each independently represents an integer satisfying 1≦h≦3 and 1≦k≦3, respectively.