公开(公告)号：US20190284410A1

公开(公告)日：2019-09-19

申请号：US15779771

申请日：2016-12-08

Applicant: KAO CORPORATION

Inventor： Koji AZUMA ,  Hirokazu HYAKUDA ,  Yusuke SHIMIZU ,  Tetsuya EGUCHI ,  Hiroki KAWAGUCHI

IPC: C09D11/322 ,  C08F220/06 ,  C08F220/18 ,  C08J3/24

Abstract: The present invention relates to a water-based pigment dispersion having not only excellent storage stability capable of suppressing solidification of a pigment or the like in ink ejection nozzles, but also excellent ejection properties and fixing properties, while maintaining good water resistance of the pigment dispersion as an advantage attained by using the pigment therein. That is, the present invention relates to a water-based pigment dispersion including a pigment, a polymer dispersant and an aqueous medium in which the pigment is dispersed in the aqueous medium using the polymer dispersant, the polymer dispersant being a water-insoluble polymer including carboxy groups that are at least partially neutralized with an alkali metal hydroxide, and having a crosslinked structure obtained by reacting a part of the carboxy groups with a water-insoluble polyfunctional epoxy compound, said water-based pigment dispersion satisfying the following conditions 1 and 2: Condition 1: a value calculated according to the formula: {[100−(neutralization degree)−(crosslinking degree)]/100}×(acid value of carboxy group-containing water-insoluble polymer) being from 32 to 130 mgKOH/g; and Condition 2: a value calculated according to the formula: [(neutralization degree)/100]×(acid value of carboxy group-containing water-insoluble polymer) being from 48 to 144 mgKOH/g.

公开(公告)号：US20200024456A1

公开(公告)日：2020-01-23

申请号：US16320241

申请日：2017-07-26

Applicant: KAO CORPORATION

Inventor： Hironobu FUKUROI ,  Yasufumi UEDA ,  Yusuke SHIMIZU ,  Isao TSURU

IPC: C09B67/00 ,  C09D11/322 ,  C09D17/00 ,  C09B67/06 ,  C09B67/20 ,  C09B67/46

Abstract: 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.

公开(公告)号：US20190315983A1

公开(公告)日：2019-10-17

申请号：US16341817

申请日：2017-10-13

Applicant: KAO CORPORATION

Inventor： Yusuke SHIMIZU ,  Koji AZUMA ,  Hirokazu HYAKUDA ,  Tetsuya EGUCHI ,  Hiroki KAWAGUCHI

IPC: C09D11/322 ,  C09D11/326 ,  C09D17/00 ,  C08F212/08 ,  C08F218/04 ,  C08G59/32 ,  C08J3/24 ,  C08F220/18

Abstract: The present invention relates to a water-based pigment dispersion containing a polymer dispersant and a pigment, the polymer dispersant being prepared by crosslinking a carboxy group-containing water-insoluble polymer (A) with a water-insoluble polyfunctional epoxy compound, in which carboxy groups of the water-insoluble polymer (A) are at least partially neutralized by an alkali metal compound, and the water-based pigment dispersion satisfies the following conditions 1 to 3. The water-based pigment dispersion of the present invention can exhibit excellent redispersibility capable of suppressing solidification of the pigment or the polymer in ink ejection nozzles and can ensure good storage stability under high-temperature conditions. The conditions 1 to 3 are as follows: Condition 1: a value calculated according to the formula: {[100−(neutralization degree)−(crosslinking degree)]/100}×[acid value of water-insoluble polymer (A)] is from −30 to 30 mgKOH/g: Condition 2: a value calculated according to the formula: [(neutralization degree)/100]×[acid value of water-insoluble polymer (A)] is from 80 to 180 mgKOH/g; and Condition 3: a value calculated according to the formula: [(crosslinking degree)/100]×[acid value of water-insoluble polymer (A)] is from 80 to 180 mgKOH/g.

公开(公告)号：US20160090483A1

公开(公告)日：2016-03-31

申请号：US14891180

申请日：2014-05-14

Applicant: KAO CORPORATION

Inventor： Hironobu FUKUROI ,  Takahiro SATO ,  Isao TSURU ,  Yusuke SHIMIZU ,  Yasufumi UEDA

IPC: C09B67/00 ,  C09D11/322 ,  C09B67/20

CPC classification number: C09B67/0022 ,  C09B67/006 ,  C09B67/0086 ,  C09B67/0089 ,  C09B67/009 ,  C09D11/00 ,  C09D11/322 ,  C09D17/003

Abstract: The present invention provides the following process for producing a fine organic pigment which is capable of producing the fine organic pigment that has a very small primary particle size and is excellent in filtering property even in a cleaning step, and a fine organic pigment produced by the process; a process for producing a dispersion using the fine organic pigment, and a dispersion produced by the process; and a process for producing an ink using the dispersion. The present invention relates to [1] a process for producing a fine organic pigment, including steps 1 and 2: step 1: kneading a mixture prepared by compounding a raw material organic pigment, a water-soluble inorganic salt, a water-soluble organic solvent and a compound represented by the following formula (1) with each other, the compound being compounded in an amount of not less than 0.8 part by mass and not more than 18.0 parts by mass on the basis of 100 parts by mass of the raw material organic pigment: R1O(PO)m(EO)nA (1); and step 2: subjecting the mixture obtained in the step 1 to cleaning treatment with an aqueous solvent and then to filtration, [2] a fine organic pigment produced by the process according to the above aspect [1], [3] a dispersion produced using the fine organic pigment according to the above aspect [2], [4] a process for producing a paste of a fine organic pigment, including the above step 1 and 2, [5] a process for producing a dispersion, including step 3 of subjecting the paste of the fine organic pigment produced by the process according to the above aspect [4], an organic solvent and water to dispersing treatment, and [6] a process for producing an ink, including step 4 of mixing the dispersion produced by the process according to the above aspect [5] with at least one material selected from the group consisting of water and an organic solvent.

Abstract translation: 本发明提供以下制造能够生产具有非常小的一次粒径的微细有机颜料并且即使在清洁步骤中也具有优异的过滤性能的有机颜料的方法，以及由 处理; 使用该有机颜料的分散体的制造方法和通过该工序制造的分散体; 以及使用该分散体生产油墨的方法。 本发明涉及[1]一种精细有机颜料的制造方法，其包括步骤1和2：步骤1：将通过混合原料有机颜料，水溶性无机盐，水溶性有机颜料， 溶剂和由下式（1）表示的化合物彼此混合，所述化合物的配合量为基于100质量份的原料不少于0.8质量份且不超过18.0质量份 材料有机颜料：R1O（PO）m（EO）nA（1）; 和步骤2：将在步骤1中获得的混合物用水溶剂进行清洗处理，然后过滤，[2]通过根据上述方面[1]，[3]的方法制备的精细有机颜料，产生分散体 使用根据上述方面[2]的细有机颜料，[4]一种制备包含上述步骤1和2的有机有机颜料的糊料的方法，[5]一种分散体的制备方法，包括步骤3 将通过上述方面[4]的方法生产的精细有机颜料的糊料，有机溶剂和水进行分散处理，[6]一种制备油墨的方法，包括步骤4，将生成的分散体 通过根据上述方面[5]的方法与至少一种选自水和有机溶剂的材料。