SOLVENT-FREE EMULSIFICATION OF HIGH VISCOSITY RESIN

• Main Authors: ZHOU KE, NUNG SHIN HU, GUERINO G SACRIPANTE
• Format: Patent
• Language: English; Japanese
• Published: 28.07.2016
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; CINEMATOGRAPHY; COMPOSITIONS BASED THEREON; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; GENERAL PROCESSES OF COMPOUNDING; HOLOGRAPHY; MAGNETOGRAPHY; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PHOTOGRAPHY; PHYSICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

PROBLEM TO BE SOLVED: To provide an emulsification process of a high viscosity resin without using a solvent.SOLUTION: In one embodiment, a solvent-free emulsification process for producing a latex having an average particle size of 50 to 900 nm is provided that comprises: heating a high viscosity resin to 90°C or more; mixing the heated resin with a surfactant and a neutralization agent in an amount corresponding to an acid value of the resin in a reaction vessel provided with a mixing device in the absence of an organic solvent to form a mixture; adding water to the mixture under pressurization of ca. 10 to 1000 KPa to form an emulsion under agitation; and reducing pressure in the vessel to obtain a solvent-free emulsion containing resin particles. In another embodiment, the solvent-free emulsification process is provided that is identical to the solvent-free emulsification process in the above one embodiment except that the surfactant is present in an amount of ca. 1 to ca. 10 wt% relative to a dry resin.SELECTED DRAWING: None 【課題】高粘度樹脂を溶媒を使用せずに乳化するプロセスの提供。【解決手段】高粘度樹脂を９０℃以上に加熱し、混合デバイスを備える反応容器中で有機溶媒非存在下で界面活性剤及び樹脂の酸価に応じた量の中和剤と混合し、約１０〜１０００ＫＰａの加圧下で水を加え撹拌下でエマルションを作成し、容器中の圧力を下げ樹脂粒子を含む無溶媒エマルションを得る、平均粒径が約５０〜９００ｎｍのラテックスを製造する無溶媒乳化プロセス。界面活性剤が乾燥樹脂の約１〜約１０重量％の量で存在する無溶媒乳化プロセス。【選択図】なし