公开(公告)号：US20170369725A1

公开(公告)日：2017-12-28

申请号：US15539370

申请日：2015-12-16

Applicant: KAO CORPORATION

Inventor： Kaname MITSUYOSHI ,  Hirotaka TAKENO ,  Takayuki SUZUKI ,  Takahiro YOSHIKAWA

IPC: C09D11/38 ,  C09D11/324 ,  B41J2/01

CPC classification number: C09D11/38 ,  B41J2/01 ,  B41M5/00 ,  C09D11/324

Abstract: The present invention relates to a water-based ink that exhibits excellent ejection properties, and can be prevented from suffering from reduction in a dot size of the ink during a drying step thereof even when printed on a low-water absorbing recording medium, and is capable of obtaining printed characters or images having excellent uniformity, as well as an ink-jet printing method using the water-based ink. The water-based ink includes a pigment, a water-insoluble polymer, an acetylene glycol-based nonionic surfactant (A) having HLB of not less than 0 and not more than 5, a nonionic surfactant (B) having HLB of not less than 6 and not more than 20, a polyether-modified silicone (C) having a kinematic viscosity of not less than 30 mm2/s and not more than 190 mm2/s as measured at 25° C. and an organic solvent (D), in which a weighted mean value of a boiling point of the organic solvent (D) is not lower than 150° C. and not higher than 230° C.

公开(公告)号：US20190329553A1

公开(公告)日：2019-10-31

申请号：US16473398

申请日：2017-12-26

Applicant: KAO CORPORATION

Inventor： Takayuki SUZUKI ,  Hirotaka TAKENO

IPC: B41J2/165 ,  C11D3/43 ,  C11D3/37 ,  C11D3/40

Abstract: The present invention relates to a cleaning liquid for a water-based ink that contains a pigment and a water-insoluble polymer, said cleaning liquid containing (A) a surfactant, (B) a water-soluble organic solvent containing (b-1) diethylene glycol monoisopropyl ether, and water, in which the surfactant (A) contains at least one compound selected from the group consisting of (a-1) an acetylene glycol or an ethyleneoxide adduct of the acetylene glycol, and (a-2) a polyethylene glycol alkyl ether containing an alkyl group having not less than 8 carbon atoms or a polyethylene glycol aryl ether containing an aryl group having not less than 6 carbon atoms, and a content of the water-soluble organic solvent (B) in the cleaning liquid is from 5 to 30% by mass; and a method of cleaning a water-based ink using the cleaning liquid.

公开(公告)号：US20200248012A1

公开(公告)日：2020-08-06

申请号：US16635106

申请日：2018-07-27

Applicant: KAO CORPORATION

Inventor： Takayuki SUZUKI ,  Takako YAMAMOTO ,  Erika MAEKAWA ,  Yasufumi UEDA

IPC: C09D11/023 ,  C09D11/324 ,  C09D11/107 ,  C09D11/38

Abstract: The present invention relates to a polymer emulsion that is capable of exhibiting excellent rub fastness even when formed into a coating film or even when printed on a low-liquid absorbing printing medium, and a water-based ink for ink-jet printing which is excellent in ejection stability and antibleeding properties upon the ink-jet printing. The present invention provides [1] a polymer emulsion containing a polymer and water, in which the polymer is a random copolymer or a block copolymer which contains a constitutional unit derived from (a) at least one monomer selected from the group consisting of acrylic acid and methacrylic acid and a constitutional unit derived from (b) a hydrophobic vinyl monomer, and is in the form of a carboxy group-containing polymer having an acid value of 150 to 300 mgKOH/g; and the polymer emulsion further contains a formaldehyde-releasing compound; and [2] a water-based ink for ink-jet printing containing a pigment, the aforementioned polymer, a water-soluble organic solvent and water, in which the water-soluble organic solvent contains at least one compound selected from the group consisting of a polyhydric alcohol and a polyhydric alcohol alkyl ether, and a total content of the polyhydric alcohol and the polyhydric alcohol alkyl ether in the ink is not less than 18% by mass; and the water-based ink further contains a formaldehyde-releasing compound.

公开(公告)号：US20200156396A1

公开(公告)日：2020-05-21

申请号：US16635098

申请日：2018-07-27

Applicant: KAO CORPORATION

Inventor： Takayuki SUZUKI ,  Takako YAMAMOTO ,  Erika MAEKAWA ,  Yasufumi UEDA

IPC: B41M5/00 ,  C09D11/326 ,  C09D11/322 ,  C09D11/107 ,  C08J3/07 ,  C08F220/06 ,  C09D11/38 ,  C08F212/08 ,  C08F220/18 ,  C09C1/56 ,  C09C3/10

Abstract: The present invention relates to a pigment water dispersion containing a pigment, a crosslinked polymer and water, in which the crosslinked polymer is prepared by crosslinking a carboxy group-containing polymer with a crosslinking agent, and has an acid value of not less than 70 mgKOH/g and not more than 300 mgKOH/g; and the pigment water dispersion further contains a formaldehyde-releasing compound. The pigment water dispersion of the present invention is excellent in storage stability even when being stored under high-temperature conditions for a long period of time.

公开(公告)号：US20210277331A1

公开(公告)日：2021-09-09

申请号：US16473494

申请日：2017-12-26

Applicant: KAO CORPORATION

Inventor： Takayuki SUZUKI ,  Yasufumi UEDA

IPC: C11D1/72 ,  C11D11/00 ,  C11D3/20 ,  C11D3/43 ,  C11D17/00 ,  B41J2/165

Abstract: The present invention relates to a cleaning liquid for a water-based ink that contains a pigment and a water-insoluble polymer, said cleaning liquid containing (A) an acetylene glycol having an average molar number of addition of EO of 0 to 2 mol, (B) at least one compound selected from the group consisting of an acetylene glycol having an average molar number of addition of EO of not less than 4 mol and a polyethylene glycol alkyl ether containing an alkyl group having not less than 8 carbon atoms, (C) a water-soluble organic solvent and water, in which the water-soluble organic solvent (C) contains at least one water-soluble organic solvent having a boiling point of not lower than 90° C.; a boiling point of the water-soluble organic solvent (C) is not higher than 250° C. in terms of a weighted mean value thereof; and a content of the water-soluble organic solvent (C) in the cleaning liquid is not more than 20% by mass; a process for producing the cleaning liquid; and a method of cleaning a water-based ink using the cleaning liquid.

公开(公告)号：US20200325350A1

公开(公告)日：2020-10-15

申请号：US16956684

申请日：2018-12-21

Applicant: KAO CORPORATION

Inventor： Takahiro SATO ,  Hirotaka TAKENO ,  Takayuki SUZUKI

IPC: C09D11/107 ,  C09D11/037 ,  C09D11/033 ,  B41M1/10

Abstract: The present invention relates to a resin particle dispersion containing core/shell-type resin particles (A), a glycol ether (B) and water, in which a core portion resin of the core/shell-type resin particles (A) contains a constitutional unit derived from a (meth)acrylic acid ester containing a hydrocarbon group having 2 to 18 carbon atoms in an amount of not less than 40% by mass on the basis of constitutional units constituting the core portion resin, and an acid value of the core/shell-type resin particles (A) is 50 to 100 mgKOH/g; and in which a hydrocarbon group in an ether moiety of the glycol ether (B) has 2 to 8 carbon atoms, and a content of the glycol ether (B) in the resin particle dispersion is not less than 2.8% by mass. The resin particle dispersion according to the present invention can be used as an aqueous ink that is excellent in storage stability and substrate-adhesion properties.