Toner for electrostatic image development

摘要

A method for producing a toner for electrostatic image development containing at least a resin binder and a charge control agent, including step 1: melt-kneading components containing a resin binder and a charge control agent to provide a melt-kneaded product; and step 2: pulverizing the melt-kneaded product, and classifying a pulverized product, wherein the resin binder contains a polyester A obtained by polycondensing an alcohol component containing 1,2-propanediol and a carboxylic acid component containing a rosin compound and an aliphatic dicarboxylic acid compound having 6 to 10 carbon atoms, wherein 1,2-propanediol is contained in the alcohol component of the polyester A in an amount of 85% by mol or more. The toner for electrostatic image development obtained by the method of the present invention can be suitably used in, for example, the development or the like of latent image formed in electrophotography, an electrostatic recording method, an electrostatic printing method, or the like.

主权项

1. A method for producing a toner for electrostatic image development comprising at least a resin binder and a charge control agent, the method comprising:
melt-kneading components comprising a resin binder and a charge control agent to provide a melt-kneaded product; and pulverizing the melt-kneaded product, and classifying a pulverized product, wherein the resin binder comprises a polyester A obtained by polycondensing an alcohol component comprising 1,2-propanediol and a carboxylic acid component comprising a rosin compound and an aliphatic dicarboxylic acid compound having 6 to 10 carbon atoms, wherein 1,2-propanediol is contained in the alcohol component of the polyester A in an amount of 85% by mol or more, and wherein the resin binder comprises a polyester H having a softening point of from 125° to 155° C., and a polyester L having a softening point of from 90° to 125° C., wherein a difference in the softening points of the polyester H and the polyester L is 10° C. or more, and wherein at least one of the polyester H and the polyester L is the polyester A.