Aqueous ink, ink cartridge and ink jet recording method
US11613662B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 9, 2021 |
| Grant date | Mar 28, 2023 |
| Priority date | — |
| Expiry date | Jun 23, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/322
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Provided is an aqueous ink for ink jet that has excellent storage stability and whose viscosity does not easily increase even in a case where the ink is stored in a severe environment such as a high temperature condition. This aqueous ink for ink jet contains a coloring material and a block copolymer. The block copolymer includes an A block having a segment A having no acid group and a group represented by Formula (1) bonded to one terminal of the segment A, and a B block having a segment B having an acid group and a group represented by Formula (2) bonded to one terminal of the segment B.(In Formula (1), R1 represents an alkylene group, and M represents a hydrogen atom, an alkali metal, ammonium or organic ammonium. In Formula (2), R2 and R3 each independently represent an alkyl group or the like.)
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.