Toner using resin having active hydrogen-containing group and method of preparing the same
Provided are a toner using a resin having an active hydrogen-containing group, and a method of preparing the toner. The toner using a resin having an active hydrogen-containing group includes a binder resin (A), a cross-linked resin including a THF insoluble content of 99-100 weight %, a colorant, and at least one additive. The cross-linked resin is arranged in the form of a plurality of islands in each particle of the toner.
1. A toner comprising:
a binder resin (A);
a cross-linked resin having a THF insoluble content of 99-100 wt % with respect to tetrahydrofuran (THF);
a colorant; and
at least one additive,
wherein the cross-linked resin is arranged in the form of a plurality of islands,
wherein the cross-linked resin is formed by a cross-linking reaction of a resin (B) having an active hydrogen-containing group, and a cross-linking agent,
wherein the content of the cross-linking agent is in an amount of 0.004 to 0.15 mol with respect to 1 mol of the active hydrogen-containing group.
2. The toner of claim 1 , wherein the resin (B) having an active hydrogen-containing group is a polyester resin including at least one selected from the group consisting of a hydroxyl group, a mercapto group, a carboxyl group, a phosphate group, a sulfonate group, and a sulfate group.
3. The toner of claim 1 , wherein the cross-linking agent is an isocyanate compound or an epoxy compound.
4. The toner of claim 1 , wherein the content of the cross-linked resin is 10 to 20 parts by weight with respect to 100 parts by weight of the binder resin (A).
5. The toner of claim 1 , wherein the colorant is in the form of a pigment master batch.
6. A method of preparing a toner, comprising:
preparing a toner mixture solution by mixing a binder resin (A), a colorant, and at least one additive to an organic solvent;
forming a toner micro-suspension by adding the toner mixture solution to a dispersion medium;
forming a toner composition by removing the organic solvent from the toner micro-suspension; and
forming a toner composite in which a cross-linked resin is arranged in the form of a plurality of islands, by mixing the toner composition with a cross-linked resin micro-suspension and aggregating and melt-adhering the mixture.
7. The method of claim 6 , wherein the cross-linked resin micro-suspension is formed by forming a micro-suspension by mixing a resin (B) having an active hydrogen-containing group, a cross-linking agent, and an organic solvent in a dispersion medium, and heating the micro-suspension to remove the organic solvent.
8. The method of claim 7 , wherein the resin (B) having an active hydrogen-containing group is a polyester resin containing at least one selected from the group consisting of a hydroxyl group, a mercapto group, a carboxyl group, a phosphate group, a sulfonate group, and a sulfate group.
9. The method of claim 7 , wherein the cross-linking agent is an isocyanate compound or an epoxy compound.
10. The method of claim 7 , wherein the content of the cross-linking agent is in an amount of 0.004 to 0.15 mol with respect to 1 mol of the active hydrogen-containing group.
11. The method of claim 6 , wherein the content of the cross-linked resin is 10 to 20 parts by weight with respect to 100 parts by weight of the binder resin (A).
12. The method of claim 6 , wherein the cross-linked resin has a THF insoluble content of 99-100 wt %.
13. The method of claim 6 , wherein the colorant is used in the form of a pigment master batch.
14. An electrophotographic image forming apparatus comprising a toner having:
a binder resin (A);
a cross-linked resin having a THF insoluble content of 99-100 wt % with respect to tetrahydrofuran (THF);
a colorant; and
at least one additive,
wherein the cross-linked resin is arranged in the form of a plurality of islands,
wherein the cross-linked resin is formed by a cross-linking reaction of a resin (B) having an active hydrogen-containing group, and a cross-linking agent,
wherein the content of the cross-linking agent is an amount of 0.004 to 0.15 mol with respect to 1 mol of the active hydrogen-containing group.