METHOD FOR PRODUCING AQUEOUS PIGMENT COMPOSITION, AND INK FOR PRINTING
PROBLEM TO BE SOLVED: To provide a method for producing an aqueous pigment composition which does not cause a solvent shock and is excellent in storage stability.SOLUTION: The method for producing an aqueous pigment composition containing a pigment, a water-soluble solvent and/or water, a dispersion...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To provide a method for producing an aqueous pigment composition which does not cause a solvent shock and is excellent in storage stability.SOLUTION: The method for producing an aqueous pigment composition containing a pigment, a water-soluble solvent and/or water, a dispersion resin, and a binder resin includes, in the following order: a step 1 of dispersing the pigment in the water-soluble solvent and/or water with the dispersion resin to obtain a pigment dispersion; a step 2 of adding an aqueous surfactant solution to the pigment dispersion obtained in the step 1; a step 3 of subsequently adding the binder resin thereto; and a step 4 of performing ultrasonic treatment. The concentration of the aqueous surfactant solution in the step 2 is less than 13.5 wt.%. An ink for printing uses the aqueous pigment composition obtained by the production method.
【課題】 ソルベントショックが生じず、保存安定性に優れた水性顔料組成物の製造方法を提供することにある。【解決手段】 顔料と、水溶性溶媒及び/または水と、分散樹脂と、バインダー樹脂とを含有する水性顔料組成物の製造方法であって、前記水溶性溶媒及び/または水中に前記分散樹脂で前記顔料を分散させて顔料分散液を得る工程1と、前記工程1で得た顔料分散液に界面活性剤水溶液を添加する工程2と、次いで前記バインダー樹脂を添加する工程3と、超音波処理を行う工程4をこの順に有し、前記工程2における界面活性剤水溶液濃度が13.5重量%未満である水性顔料組成物の製造方法、及び該製造方法により得た水性顔料組成物を使用した捺染用のインキ。【選択図】 なし |
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