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.