Toner and method for producing toner
A toner comprising a toner particle including a resin component, wherein the resin component includes an olefin copolymer including ester group having specific structures Y1 and Y2 and an olefin copolymer including acid group having an acid value of from 50 mg KOH/g to 300 mg KOH/g, the amount of the olefin copolymer including ester group is 50% by mass or more, the toner particle has a surface layer including the olefin copolymer including acid group which has formed a salt with a metal, the metal is at least one metal selected from the group consisting of Mg, Ca, Sr, Al, and Zn, and the total amount of the metal in the toner is from 25 ppm to 500 ppm.
1. A toner comprising a toner particle including a resin component, wherein
the resin component includes an olefin copolymer including ester group and an olefin copolymer including acid group,
the olefin copolymer including ester group has a structure Y1 represented by formula (1) below, and at least one structure Y2 selected from the group consisting of a structure represented by formula (2) below and a structure represented by formula (3) below,
the olefin copolymer including acid group has an acid value of from 50 mg KOH/g to 300 mg KOH/g,
an amount of the olefin copolymer including ester group is 50% by mass or more based on a total mass of the resin component,
the toner particle has a surface layer including the olefin copolymer including acid group which has formed a salt with a metal,
the metal is at least one metal selected from the group consisting of Mg, Ca, Sr, Al, and Zn, and
a total amount of the metal in the toner is from 25 ppm to 500 ppm on a mass basis:
and wherein R 1 represents H or CH 3 , R 2 represents H or CH 3 , R 3 represents CH 3 or C 2 H 5 , R 4 represents H or CH 3 , and R 5 represents CH 3 or C 2 H 5 .
2. The toner according to claim 1 , wherein the olefin copolymer including acid group includes a carboxy group.
3. The toner according to claim 1 , wherein the olefin copolymer including acid group is an ethylene-acrylic acid copolymer or an ethylene-methacrylic acid copolymer.
4. The toner according to claim 1 , wherein an ester group concentration in the olefin copolymer including ester group is from 2.0% by mass to 18.0% by mass based on a total mass of the olefin copolymer including ester group.
5. The toner according to claim 1 , wherein an amount of the olefin copolymer including acid group is from 10.0% by mass to 30.0% by mass based on the total mass of the resin component.
6. A method for producing a toner comprising a toner particle including a resin component, the method comprising the steps of:
preparing a resin fine particle dispersion liquid;
adding a flocculant to the resin fine particle dispersion liquid to form aggregate particles; and
heating and fusing the aggregate particles to obtain a dispersion liquid including toner particles, wherein
the resin component contains an olefin copolymer including ester group and an olefin copolymer including acid group,
the olefin copolymer including ester group has a structure Y1 represented by formula (1) below, and at least one structure Y2 selected from the group consisting of a structure represented by formula (2) below and a structure represented by formula (3) below,
the olefin copolymer including acid group has an acid value of from 50 mg KOH/g to 300 mg KOH/g,
an amount of the olefin copolymer including ester group is 50% by mass or more based on a total mass of the resin component,
the toner particle has a surface layer including the olefin copolymer including acid group which has formed a salt with a metal,
the metal is at least one metal selected from the group consisting of Mg, Ca, Sr, Al, and Zn, and
a total amount of the metal in the toner is from 25 ppm to 500 ppm on a mass basis:
and wherein R 1 represents H or CH 3 , R 2 represents H or CH 3 , R 3 represents CH 3 or C 2 H 5 , R 4 represents H or CH 3 , and R 5 represents CH 3 or C 2 H 5 .
7. The method for producing a toner according to claim 6 , wherein the flocculant is a metal salt including at least one metal selected from the group consisting of Mg, Ca, Sr, Al, and Zn.
8. The method for producing a toner according to claim 6 , the method further comprising a step of adding a chelate compound having a chelating ability with respect to metal ions to the dispersion liquid including toner particles to remove the metal.