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US 12,522,740 B2Granted
Aqueous pigment dispersion
AssigneeKao Corporation
InventorsTomohiko Nagano, Shimpei Kobayashi, Hiroto Soma, Shu Nagashima, Yuki Ozaki
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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.
Claims22
A pigment water dispersion, comprising:
- pigment-containing polyester resin particles,
- wherein the polyester resin comprises a constitutional unit derived from an alcohol component and a constitutional unit derived from a carboxylic acid component,
- wherein the alcohol component comprises 3-methyl-1,5-pentanediol,
- wherein an average particle size of the pigment-containing resin particles is not less than 60 nm and not more than 350 nm,
- wherein a mass ratio of the pigment to the pigment-containing polyester resin particles (pigment/pigment-containing polyester resin particles) is 0.2 or more and 0.7 or less.
2 more elements
Dependencies are inferred from the claim text.