Patent ID: 6756171
Filing Date: 2004-06-29
Classification: G03G

Abstract:
Polyester resin for the production of toner comprising aromatic dicarboxylic acid, trivalent or higher carboxylic acid, aliphatic diol, bisphenol A derivative aromatic diol, and trihydric or higher alcohol, wherein the amount of the bisphenol A derivative aromatic diol having the mole number of ethylene oxide and/or propylene oxide of 2 mole is equal to or more than 85 weight % of the entire bisphenol A derivative aromatic diol, the amount of the bisphenol A derivative aromatic diol having the mole number of ethylene oxide or propylene oxide of 1 mole is less than 0.2 weight % of the entire bisphenol A derivative aromatic diol, the amount of the aromatic dicarboxylic acid is more than 80 mol % of the entire diacid, the amount of the trivalent or higher carboxylic acid is 0.5-30 mol % of the entire diacid, the amount of the aliphatic diol is 10-80 mol % of the entire diacid, the amount of the aromatic diol is less than 90 mol % of the entire diacid, and the amount of the trihydric or higher alcohol is 0.5-50 mol % of the entire diacid.