公开(公告)号：US20210198507A1

公开(公告)日：2021-07-01

申请号：US17132382

申请日：2020-12-23

申请人： Seiko Epson Corporation

发明人： Hiroaki KUMETA ,  Soichi YAMAZAKI ,  Manabu TANIGUCHI ,  Shunsuke UCHIZONO ,  Miki IINUMA ,  Sena GOZU

IPC分类号： C09D11/324 ,  C09D11/38 ,  C08K3/36 ,  C08K5/17 ,  B41J2/21 ,  B41J2/14

摘要： An ink jet ink contains a pigment; an inorganic oxide colloid; a betaine; and water, and in the ink jet ink described above, a total concentration (mg/L) of potassium ions and sodium ions in the ink is 500 ppm or less.

公开(公告)号：US20240124732A1

公开(公告)日：2024-04-18

申请号：US18473381

申请日：2023-09-25

申请人： SEIKO EPSON CORPORATION

发明人： Sena GOZU ,  Kenta UCHIDA

IPC分类号： C09D11/322 ,  B41M5/00 ,  C09D11/38

CPC分类号： C09D11/322 ,  B41M5/0023 ,  B41M5/0088 ,  C09D11/38

摘要： An ink jet ink composition functioning as a water-based magenta ink includes an azo-based pigment and a 1,2-alkanediol having 4 to 8 carbon atoms. In the ink jet ink composition described above, the azo-based pigment has a volume average particle diameter D50 of 110 nm or less, and a content of the 1,2-alkanediol having 4 to 8 carbon atoms with respect to a total mass of the composition is 3.5 percent by mass or less.

公开(公告)号：US20240076512A1

公开(公告)日：2024-03-07

申请号：US18456729

申请日：2023-08-28

申请人： SEIKO EPSON CORPORATION

发明人： Sena GOZU ,  Yuko HISHIDA ,  Kenta UCHIDA

IPC分类号： C09D11/322 ,  C09D11/38

CPC分类号： C09D11/322 ,  C09D11/38

摘要： A water-based ink jet ink composition contains C.I. Pigment Red 150 and at least one of 1-(2-hydroxyethyl)-2-pyrrolidone and ε-caprolactam.