公开(公告)号：US20240174875A1

公开(公告)日：2024-05-30

申请号：US18551074

申请日：2022-03-18

Applicant: KAO CORPORATION

Inventor： Tomohiko NAGANO ,  Shimpei KOBAYASHI ,  Hiroto SOMA ,  Shu NAGASHIMA ,  Yuki OZAKI

IPC: C09D11/326 ,  C09D17/00

CPC classification number: C09D11/326 ,  C09D17/001

Abstract: A pigment water dispersion, including pigment-containing polyester resin particles. The polyester resin contains a constitutional unit derived from an alcohol component and a constitutional unit derived from a carboxylic acid component, the alcohol component contains 3-methyl-1,5-pentanediol, and an average particle size of the pigment-containing resin particles is not less than 60 nm and not more than 350 nm.

公开(公告)号：US20230407118A1

公开(公告)日：2023-12-21

申请号：US18254061

申请日：2021-11-25

Applicant: KAO CORPORATION

Inventor： Tomohiko NAGANO ,  Hiroto SOMA ,  Shu NAGASHIMA

IPC: C09D11/322 ,  C09D7/40 ,  C09D167/02 ,  C09D7/65

CPC classification number: C09D11/322 ,  C09D7/67 ,  C09D7/68 ,  C09D167/025 ,  C09D7/65

Abstract: A pigment water dispersion including pigment-containing polyester resin particles. An alcohol component as a raw material monomer of the polyester resin satisfies the following conditions 1 and 2. Condition 1: a content of a compound (I) represented by the following formula (I) in the alcohol component is not more than 7 mol %,




wherein OR1 and R2O are each independently an oxyalkylene group comprising not less than 1 and not more than 4 carbon atoms, and x and y are each independently a positive number of not less than 0. Condition 2: a content of a compound (II) comprising two secondary hydroxy groups except for the compound (I) in the alcohol component is not less than 45 mol %.