JP2014219434A5 - - Google Patents

Claims (8)

A toner having toner particles containing a binder resin, a colorant, a first wax and a second wax,
The binder resin contains a resin A having a polyester structure portion that can take a crystal structure, and the polyester structure portion that can take the crystal structure is 30.30% based on the mass of the binder resin in the binder resin. 0% by mass or more,
The first wax is a tetra- or higher functional ester wax having a molecular weight of 1500 or more.
The second wax is a hydrocarbon wax having a molecular weight of 1000 or less,
In the measurement of the endotherm using a differential scanning calorimeter (DSC), the peak temperature of the maximum endothermic peak when the binder resin is used as a sample is Tc (° C.), and the maximum when the first wax is used as a sample. When the peak temperature of the endothermic peak is Tw1 (° C.) and the peak temperature of the maximum endothermic peak when the second wax is used as a sample is Tw2 (° C.), the Tc, Tw1, and Tw2 are
Formula (1) 50.0 ≦ Tc ≦ 80.0
Formula (2) Tc <Tw1 ≦ Tw2
Satisfy the relationship
When the first wax content is W1 (parts by mass) and the content of the second wax is W2 (parts by mass) with respect to 100.0 parts by mass of the binder resin, the W1 and W2 are:
Formula (3) 2.0 ≦ W1 + W2 ≦ 15.0
Formula (4) 0.1 <= W2 / W1 <= 1.0
A toner characterized by satisfying the following relationship: Tw1 and Tc are
Formula (5) 60.0 ≦ Tw1 ≦ 85.0
Formula (6) 5.0 <= Tw1-Tc <= 25.0
The toner according to claim 1, wherein the following relationship is satisfied. Tw1 and Tw2 are
Formula (7) 0 <= Tw2-Tw1 <= 20.0
The toner according to claim 1, wherein the toner satisfies the following relationship. Tw1 and Tw2 are
Formula (8) 0 <= Tw2-Tw1 <= 6.0
The toner according to claim 3, wherein the relationship is satisfied.   5. The toner according to claim 1, wherein the resin A is a block polymer in which a portion that can take a crystal structure and a portion that cannot take a crystal structure are chemically bonded.   6. The toner according to claim 5, wherein the portion that can take the crystal structure is crystalline polyester, and the portion that cannot take the crystal structure is polyurethane.   7. The toner according to claim 5, wherein the block polymer contains a site capable of taking the crystal structure in an amount of 30.0% by mass or more and 90.0% by mass or less. A method for producing a toner according to any one of claims 1 to 7,
(I) adding the binder resin, the colorant, the first wax, and the second wax in an organic solvent capable of dissolving the binder resin to obtain a resin solution;
(Ii) The resin melt is dispersed in a dispersion medium mainly composed of carbon dioxide in a supercritical state or a liquid state in which resin fine particles are dispersed, granulated in the dispersion medium, and droplet particles are formed. Forming, and (iii) removing the organic solvent from the droplet particles;
Through the manufacturing method of the toner particles produced to features and to belt toner to Rukoto a.