METHOD FOR MANUFACTURING LIQUID COMPOSITION

• Main Authors: MIYAMOTO HISATERU, KAKIMOTO HIDENOBU, YOSHIDA KAN, IWATA YUKICHIKA, KAMIOKA TAKAHIRO
• Format: Patent
• Language: English; Japanese
• Published: 04.04.2019
• Subjects: ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY

To provide a method by which a liquid composition arranged so as not to cause uneven coating or nozzle clogging, and not containing an eluate worsening the life of luminance can be manufactured with high productivity.SOLUTION: A method for manufacturing a liquid composition containing a phosphorescent light-emitting material and an organic solvent comprises the steps of: preparing a mixture solution by dissolving the phosphorescent light-emitting material in an organic solvent; and filtering, by a filter unit, the mixture solution obtained by the preceding step. The filter unit includes: a housing or holder; a fluorine resin film filter; and a support member of the filter. In the housing and holder, a material of a portion in touch with the mixture solution includes only metal or a mixture of metal and at least one kind selected from a group consisting of glass, a fluorine resin, a polyethylene including no phosphorus-based antioxidant, and a polyethylene not including a substance resulting from oxidation of a phosphorus-based antioxidant. In the support member of the filter, a material of a portion in touch with the mixture solution is at least one kind selected from a group consisting of metal, glass, a fluorine resin, a polyethylene including no phosphorus-based antioxidant, and a polyethylene not including a substance resulting from oxidation of a phosphorus-based antioxidant.SELECTED DRAWING: None 【課題】塗布ムラ又はノズルの目詰まりが無く、かつ輝度寿命を低下させる溶出物を含まない液状組成物を、高い生産性で製造することができる方法を提供すること。【解決手段】リン光発光材料及び有機溶媒を含む液状組成物の製造方法であって、リン光発光材料を有機溶媒に溶解させて混合液を調製する工程と、前記工程で得られた混合液を濾過器で濾過する工程とを含み、前記濾過器が、ハウジング又はホルダーと、フッ素樹脂膜フィルターと、フィルターの支持部材とを備え、前記ハウジング及びホルダーにおける前記混合液と接触する部分の材料が、金属のみ、あるいは、金属と、ガラス、フッ素樹脂、リン系酸化防止剤を含まないポリエチレン及びリン系酸化防止剤の酸化体を含まないポリエチレンからなる群から選ばれる少なくとも一種との混合物であり、前記フィルターの支持部材における前記混合液と接触する部分の材料が、金属、ガラス、フッ素樹脂、リン系酸化防止剤を含まないポリエチレン及びリン系酸化防止剤の酸化体を含まないポリエチレンからなる群から選ばれる少なくとも一種である、製造方法。【選択図】なし