Patent ID: 7226984
Filing Date: 2007-06-05
Classification: C08G,G03G

Abstract:
1. A binder for use in an electrostatic image developing toner, comprising: a polyester resin (A) comprised of constituents of a carboxylic acid component (a) and an alcohol component (b), at least a part of the carboxylic acid component (a) is selected from (Xa1) and (or at least a part of the alcohol component (b) is selected from (Xb), wherein (Xa1) and (Xb) comprise an aliphatic hydrocarbon group (x) having a carbon number of 100 to 1000, the average functional group number of (Xa1) and (Xb) being 1.6 or more, wherein: (Xa1) is a carboxy-modified unsaturated bond-containing polyolefin in which the number of unsaturated bonds is 0.4 to 10 per 1000 carbon atoms in the unmodified polyolefin and has at least one functional group selected from the group consisting of a carboxyl group, an ester group and an acid anhydride group; and (Xb) is an alcohol containing the aliphatic hydrocarbon group (x) and has a hydroxyl group, and wherein the component (a) comprises other polycarboxylic acid and/or the component (b) comprises other polyol, whereby, in a molecular chain of the (A), a portion between the (Xa1)'s, (Xb)'s, or (Xa1) and (Xb) adjacent to each other in the molecular chain and a portion between the molecular terminal and the nearest of (Xa1) and (Xb) to the molecular terminal comprise said other polyol, said other carboxylic acid, or a polycondensale of said other polyol and said other polycalboxylic acid.