METHOD FOR PRODUCING TONER FOR ELECTROSTATIC CHARGE IMAGE DEVELOPMENT

• Main Author: SHIMIZU AKITAKA
• Format: Patent
• Language: English; Japanese
• Published: 22.03.2018
• Subjects: CINEMATOGRAPHY; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; MAGNETOGRAPHY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide a method for producing a toner for electrostatic charge image development capable of obtaining a toner which has a small amount of desorption of a release agent and is excellent in heat-resistant storage property.SOLUTION: A method for producing a toner for electrostatic charge image development includes: a step (1) of mixing an aqueous dispersion liquid of a release agent and resin particles (A), and emulsifying the aqueous dispersion liquid to obtain an aqueous dispersion liquid of release agent particles; a step (2) of mixing the aqueous dispersion liquid of release agent particles obtained in the step (1) with the aqueous dispersion liquid of the resin particles (B), and aggregating the mixed substance to obtain aggregated particles; and a step (3) of fusing the aggregated particles obtained in the step (2) to obtain fused particles, where the resin particles (A) contain a polyester resin (X), the polyester resin (X) is a polyester resin containing a component derived from hydrocarbon wax having a hydroxyl group or a carboxyl group, and a volume average particle diameter (D) of the resin particles (A) is 0.01 μm or more and 1.0 μm or less.SELECTED DRAWING: None 【課題】離型剤の脱離量が少なく、かつ耐熱保存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）の水系分散液とを混合し、乳化させて、離型剤粒子の水系分散液を得る工程、工程（２）：工程（１）で得られた離型剤粒子の水系分散液と、樹脂粒子（Ｂ）の水系分散液とを混合し、凝集させて、凝集粒子を得る工程、及び工程（３）：工程（２）で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静電荷像現像用トナーの製造方法であって、樹脂粒子（Ａ）が、ポリエステル樹脂（Ｘ）を含有し、ポリエステル樹脂（Ｘ）が、水酸基又はカルボキシ基を有する炭化水素ワックス由来の構成成分を含有するポリエステル樹脂であり、樹脂粒子（Ａ）の体積平均粒径（ＤＶ）が、０．０１μｍ以上１．０μｍ以下である、静電荷像現像用トナーの製造方法である。【選択図】なし