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US 8,475,995 B2Granted
Toner having core-shell structure and method of preparing the same
AssigneeSamsung Fine Chemicals Co., Ltd.
InventorsDae Il Hwang, Woo Young Yang, Keon Il Kim, Il Hyuk Kim, Jae Bum Park, Il Sun Hwang, Jae Kwang Hwang, Dae Woong Choi, Dong Won Kim, Duck Kyun Ahn
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Abstract
A toner has a core-shell structure including a toner core portion having a resin with an active hydrogenactive hydrogen containing group, a colorant and at least one additive, and a toner shell portion surrounding the toner core portion, wherein the toner shell portion includes a cross-linked resin prepared by reaction of at least a portion of the active hydrogen containing group and the cross-linking agent.
Claims8
A method of preparing a toner, the method comprising:
- forming an emulsion in which an organic solvent is dispersed in a dispersion medium in the form of a plurality of islands by mixing the dispersion medium and the organic solvent in a reactor;
- forming a toner micro-suspension by adding a mixture including a resin having an active hydrogenactive hydrogen containing group, a colorant and at least one additive to the reactor and then mixing the resultant;
- forming a toner core portion by removing the organic solvent from the toner micro-suspension;
- and
- forming a toner shell portion surrounding the toner core portion by crosslinking reaction of at least a portion of the active hydrogen containing group and a cross-linking agent.
2 more elements
Dependencies are inferred from the claim text.