METHOD FOR MANUFACTURING TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT

• Main Author: SHIMIZU AKITAKA
• Format: Patent
• Language: English; Japanese
• Published: 11.07.2016
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a method for manufacturing a toner for electrostatic charge image development, by which a toner suppressing drop and exposure of a releasing agent and exerting excellent followability in a solid image in printing can be obtained.SOLUTION: The method for manufacturing a toner for electrostatic charge image development includes: a step (1) for mixing a releasing agent and an aqueous dispersion of resin particles (A) to obtain an aqueous dispersion of releasing agent particles; a step (2) for mixing and aggregating the obtained aqueous dispersion of releasing agent particles and an aqueous dispersion of resin particles (B) to obtain aggregated particles; and a step (3) for fusing the obtained aggregated particles to obtain fused particles. The resin particles (A) contain a composite resin having a segment (a1) that comprises a polyester resin and a vinyl resin segment (a2) that contains constituent units derived from a styrene-based compound. The resin constituting the resin particles (B) contains 50 mass% or more of a segment (b1) comprising a polyester resin.SELECTED DRAWING: None 【課題】離型剤の脱離及び露出が抑制され、印刷時のベタ追従性に優れるトナーを得ることが可能な静電荷像現像用トナーの製造方法を提供する。【解決手段】工程（１）：離型剤と樹脂粒子（Ａ）の水分散液とを混合して、離型剤粒子の水分散液を得る工程、工程（２）：得られた離型剤粒子の水分散液と樹脂粒子（Ｂ）の水分散液とを混合し凝集させて凝集粒子を得る工程、及び工程（３）：得られた凝集粒子を融着させて融着粒子を得る工程、を含むトナーの製造方法であって、前記樹脂粒子（Ａ）が、ポリエステル樹脂からなるセグメント（ａ１）と、スチレン系化合物由来の構成単位を含有するビニル系樹脂セグメント（ａ２）とを有する複合樹脂を含有し、前記樹脂粒子（Ｂ）を構成する樹脂が、ポリエステル樹脂からなるセグメント（ｂ１）を５０質量％以上含有する樹脂である、静電荷像現像用トナーの製造方法。【選択図】なし