Abstract: Provided is a toner binder having excellent charging characteristics and blocking resistance, and an increased range of fixing temperatures when used as a toner. The present invention is a toner binder containing a polyester resin (P) comprising one or more types of polyester resins obtained by polycondensation of a carboxylic acid component (x) and an alcohol component (y), wherein at least one type (P1) of (P) contains 50 to 95 mol % of a aliphatic diol (y1) having a carbon number of 2 to 4 in the alcohol component (y), and (P) satisfies expressions (1) and (2). 11.5?SP value [(cal/cm3)1/2] of (P)?13.0??(1) 5.2?HLB value (by Oda method) of (P)?7.1??(2).

Abstract: A liquid developer includes an insulating liquid and toner particles which are dispersed in the insulating liquid and contain a resin and a coloring agent. The resin contains a first resin which is a resin containing a component derived from a crystalline polyester resin. The coloring agent contains carbon black and nigrosine. The toner particles have a peak at not lower than 30° C. and not higher than 50° C. in a DSC curve in temperature decrease.

Abstract: A liquid developer includes an insulating liquid and toner particles which are dispersed in the insulating liquid and contain a resin and a coloring agent. The resin contains a first resin which is a crystalline urethane-modified polyester resin resulting from increase in chain length of a component derived from a polyester resin by a compound containing an isocyanate group. The toner particles have a peak in a DSC curve in temperature increase at 55° C. or higher, have a peak in the DSC curve in temperature decrease at 30° C. or higher, and have a storage elastic modulus at 80° C., not lower than 1×105 Pa and not higher than 1×107 Pa.

Abstract: A liquid developer is obtained by dispersing toner particles containing a core resin, a shell resin different from the core resin, and a coloring agent in an insulating liquid. The core resin contains a crystalline urethane-modified polyester resin. A solid content of the liquid developer corresponding to a portion of the liquid developer excluding the insulating liquid has a storage elastic modulus at 80° C., not lower than 1×104 Pa and not higher than 5×106 Pa. A lowest temperature at the time when an absolute value of an amount of change in a logarithmic value (log(G?)) of a storage elastic modulus (G?) of the solid content of the liquid developer with respect to a temperature T (° C.) (|? log(G?)/?T|) satisfies an Equation (1) below is not lower than 45° C.: |? log(G?)/?T|>0.1??Equation (1).

Abstract: Provided is a toner binder having excellent charging characteristics and blocking resistance, and an increased range of fixing temperatures when used as a toner. The present invention is a toner binder containing a polyester resin (P) comprising one or more types of polyester resins obtained by polycondensation of a carboxylic acid component (x) and an alcohol component (y), wherein at least one type (P1) of (P) contains 50 to 95 mol % of a aliphatic diol (y1) having a carbon number of 2 to 4 in the alcohol component (y), and (P) satisfies expressions (1) and (2). 11.5?SP value [(cal/cm3)1/2] of (P)?13.0??(1) 5.2?HLB value (by Oda method) of (P)?7.

Abstract: A liquid developer includes an insulating liquid and toner particles which are dispersed in the insulating liquid and contain a resin and a coloring agent. The resin contains a first resin which is a resin containing a component derived from a crystalline polyester resin. The coloring agent contains carbon black and nigrosine. The toner particles have a peak at not lower than 30° C. and not higher than 50° C. in a DSC curve in temperature decrease.

Abstract: A liquid developer includes an insulating liquid and toner particles which are dispersed in the insulating liquid and contain a resin and a coloring agent. The resin contains a first resin which is a crystalline urethane-modified polyester resin resulting from increase in chain length of a component derived from a polyester resin by a compound containing an isocyanate group. The toner particles have a peak in a DSC curve in temperature increase at 55° C. or higher, have a peak in the DSC curve in temperature decrease at 30° C. or higher, and have a storage elastic modulus at 80° C., not lower than 1×105 Pa and not higher than 1×107 Pa.

Abstract: A liquid developer is obtained by dispersing toner particles containing a core resin, a shell resin different from the core resin, and a coloring agent in an insulating liquid. The core resin contains a crystalline urethane-modified polyester resin. A solid content of the liquid developer corresponding to a portion of the liquid developer excluding the insulating liquid has a storage elastic modulus at 80° C., not lower than 1×104 Pa and not higher than 5×106 Pa. A lowest temperature at the time when an absolute value of an amount of change in a logarithmic value (log(G?)) of a storage elastic modulus (G?) of the solid content of the liquid developer with respect to a temperature T (° C.) (|? log(G?)/?T|) satisfies an Equation (1) below is not lower than 45° C.: |? log(G?)/?T|>0.1??Equation (1).

Abstract: Disclosed is a toner binder which has high storage stability and can achieve both of good low-temperature fixability and good hot offset resistance (a broadened fixing temperature range). Specifically disclosed is a toner binder comprising, as constituting units, a carboxylic acid component (x) and a polyol component (y), wherein the component (x) comprises two or more kinds of dicarboxylic acids (X1), selected from among aromatic dicarboxylic acids and ester-forming derivatives of the same, in a total amount of 80 mol % or more and a trivalent or higher polycarboxylic acid (x2); the component (y) comprises a polyester resin (P) which is constituted by a polyester resin (A) comprising 80 mol % or more of an aliphatic diol (y1) having 2 to 10 carbon atoms optionally together with a linear polyester resin (B); and the storage modulus at 150° C. [G?150] of resin (A) is 20000 dyn/cm2 or more and the ratio of [G?150] to the storage modulus as 180° C. [G?180] thereof, i.e., [G?150]/[G?180], is 15 of less.

Abstract: Provided is a toner binder having excellent charging characteristics and blocking resistance, and an increased range of fixing temperatures when used as a toner. The present invention is a toner binder containing a polyester resin (P) comprising one or more types of polyester resins obtained by polycondensation of a carboxylic acid component (x) and an alcohol component (y), wherein at least one type (P1) of (P) contains 50 to 95 mol % of a aliphatic diol (y1) having a carbon number of 2 to 4 in the alcohol component (y), and (P) satisfies expressions (1) and (2). 11.5?SP value[(cal/cm3)1/2] of (P)?13.0??(1) 5.2?HLB value(by Oda method) of (P)?7.

Abstract: Disclosed is a toner binder which has high storage stability and can achieve both of good low-temperature fixability and good hot offset resistance (a broadened fixing temperature range). Specifically disclosed is a toner binder comprising, as constituting units, a carboxylic acid component (x) and a polyol component (y), wherein the component (x) comprises two or more kinds of dicarboxylic acids (X1), selected from among aromatic dicarboxylic acids and ester-forming derivatives of the same, in a total amount of 80 mol % or more and a trivalent or higher polycarboxylic acid (x2); the component (y) comprises a polyester resin (P) which is constituted by a polyester resin (A) comprising 80 mol % or more of an aliphatic diol (y1) having 2 to 10 carbon atoms optionally together with a linear polyester resin (B); and the storage modulus at 150° C. [G?150] of resin (A) is 20000 dyn/cm2 or more and the ratio of [G?150] to the storage modulus as 180° C. [G?180] thereof, i.e., [G?150]/[G?180], is 15 of less.