申请人:Kao Corporation
公开号:EP3492531A1
公开(公告)日:2019-06-05
The present invention relates to [1] a process for producing a fine organic pigment, including step 1 of kneading a mixture prepared by compounding a raw material organic pigment, a water-soluble inorganic salt and a water-soluble organic solvent; and step 2 of subjecting the kneaded mixture obtained in the step 1 to cleaning treatment with an aqueous solvent and then to filtration treatment, in which before or after kneading the mixture in the step 1 and before subjecting the kneaded mixture to filtration treatment in the step 2, a sulfonic acid salt dispersant is compounded in an amount of not less than 0.8 part by mass and not more than 8.0 parts by mass on the basis of 100 parts by mass of the raw material organic pigment; [2] a process for producing a dispersion, including step 3 of subjecting a pigment mixture containing the fine organic pigment obtained by the production process according to the above [1], an organic solvent and water to dispersion treatment; and [3] a process for producing an ink, including step 4 of mixing the dispersion obtained by the production process according to the above [2] with at least one medium selected from the group consisting of water and an organic solvent.
本发明涉及[1]一种生产精细有机颜料的工艺,包括步骤 1:揉捏由有机颜料原料、水溶性无机盐和水溶性有机溶剂复配而成的混合物;步骤 2 将步骤 1 中得到的捏合混合物用水性溶剂进行清洗处理,然后进行过滤处理,其中,在步骤 1 中捏合混合物之前或之后,以及在步骤 2 中捏合混合物进行过滤处理之前,复配磺酸盐分散剂,其用量以质量份计不小于 0.8 份(按质量计)且不超过 8.0 份(按质量计)的原料有机颜料;[2]一种生产分散体的工艺,包括步骤 3,将含有通过上述[1]生产工艺获得的精细有机颜料、有机溶剂和水的颜料混合物进行分散处理;以及[3]一种生产油墨的工艺,包括步骤 4,将通过上述[2]生产工艺获得的分散体与至少一种选自水和有机溶剂的介质混合。