Back to results
US 12,590,217 B2Granted
Aqueous pigment dispersion
AssigneeKao Corporation
InventorTeruyuki Fukuda
Life of this patent
Estimating the term…
Abstract
A water-based pigment dispersion including an aluminum lake pigment (A) and a pigment dispersant (B). The pigment dispersant (B) is a polymer containing a constituent unit derived from an anionic group-containing monomer (b-1) and a constituent unit derived from a hydrophilic nonionic monomer (b-2) containing an oxyalkylene group. A water-based ink for ink-jet recording, including the water-based pigment dispersion and a water-soluble organic solvent (C).
Claims20
A water-based pigment dispersion comprising an aluminum lake pigment (A) and a pigment dispersant (B),
- wherein the pigment dispersant (B) is a polymer comprising a constituent unit derived from an anionic group-containing monomer (b-1) and a constituent unit derived from a hydrophilic nonionic monomer (b-2) comprising an oxyalkylene group,
- the content of the constituent unit derived from an anionic group-containing monomer (b-1) in all the constituent units of the dispersant (B) is 3% by mass or more and 40% by mass or less, and
- the content of the constituent unit derived from a hydrophilic nonionic monomer (b-2) in all the constituent units of the dispersant (B) is 60% by mass or more and 97% by mass or less,
- at least a part of the anionic group of the pigment dispersant (B) is neutralized, and the pigment dispersant (B) has degree of neutralization of 5 mol % or more and 30 mol % or less.
1 more element
Dependencies are inferred from the claim text.