Patent ID: 8735038

Claim:
A toner for non-contacting fusing comprising (a) toner matrix particles comprising a resin binder and (b) an external additive having an average particle size of from 10 to 100 nm, wherein the external additive is externally added to the toner matrix particles, wherein the resin binder comprises one or more polyesters including a polyester C, wherein a carboxylic acid component of the polyester C comprises (i) one or more isophthalic acid compounds selected from the group consisting of isophthalic acid and esters thereof and (ii) one or more fumaric acid/maleic acid compounds selected from the group consisting of fumaric acid, maleic acid, maleic anhydride, and esters thereof, wherein the isophthalic acid compound is contained in an amount of from 10 to 35% by weight, the fumaric acid/maleic acid compound is contained in an amount of from 1 to 15% by weight, and the isophthalic acid compound and the fumaric acid/maleic acid compound are contained in a total amount of from 20 to 36% by weight, of the total amount of the entire raw material monomers of the polyesters in the resin binder, wherein the toner has a softening point of from 90° to 120° C., and wherein polyester C has a softening point of from 90° to 120° C., obtained by polycondensing an alcohol component and a carboxylic acid component comprising 70% to 83.3 mol % of the isophthalic acid compound and 20 to 43 mol of the fumaric acid/maleic acid compound, based on 100 mol of the isophthalic acid compound.