Patent ID: 8182971

Claim:
A resin for toner, the resin comprising a polyester resin (A) produced by reacting a polyester resin (a) having an acid value of 6 mgKOH/g or less and a hydroxyl value of 10 to 80 mgKOH/g with at least one carboxylic acid (b) selected from the group consisting of aliphatic carboxylic acids, aromatic carboxylic acids, their anhydrides and lower alkyl (C1-C4) esters, wherein the equivalent ratio OHa/COOHb is 0.55 to 1.0 where OHa represents the equivalent of the hydroxyl groups originating in (a) in the reaction of (a) and (b) and COOHb represents the equivalent of the carboxyl groups originating in (b) in the reaction of (a) and (b), wherein the polyester resin (A) has an acid value of 13 to 50 mgKOH/g and a hydroxyl value of 8 mgKOH/g or less, and wherein 30 to 100 mol % of the polyol component constituting the polyester resin (A) is an aliphatic diol having 2 to 6 carbon atoms.