| 摘要 |
A binder resin for an electrostatic image developing toner, obtained by polycondensation reaction of a polycarboxylic acid and a polyol, wherein the polycarboxylic acid comprises at least one of a compound represented by formula (1) and a compound represented by formula (2) in an amount of from 50 to 100 mol %, the polyol comprises a compound represented by formula (3) in an amount of from 50 to 100 mol %, and a content of a catalyst-originated metal element in the resin is 100 ppm or less: <?in-line-formulae description="In-line Formulae" end="lead"?>R1OOCA1mB1nA1lCOOR1' (1)<?in-line-formulae description="In-line Formulae" end="tail"?> (wherein A1 is a methylene group, B1 is an aromatic hydrocarbon group, R1 and R1' each is a hydrogen atom or a monovalent hydrocarbon group, 1<=m+1<=12, and 1<=n<=3); <?in-line-formulae description="In-line Formulae" end="lead"?>R2OOCA2pB2qA2rCOOR2' (2)<?in-line-formulae description="In-line Formulae" end="tail"?> (wherein A2 is a methylene group, B2 is an alicyclic hydrocarbon group, R2 and R2' each is a hydrogen atom or a monovalent hydrocarbon group, 0<=p<=6, 0<=r<=6, and 1<=q<=3); <?in-line-formulae description="In-line Formulae" end="lead"?>HOXhYjXkOH (3)<?in-line-formulae description="In-line Formulae" end="tail"?> (wherein X is an alkylene oxide group, Y is a bisphenol structure group, 1<=h+k<=10, and 1<=j<=3).
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