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US 2022/0033668 A1Published application
Aqueous ink
AssigneeKao Corporation
InventorsMasashi INOUE, Daiki KAWATA
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AssigneeKao Corporation
InventorsMasashi INOUE, Daiki KAWATA
Estimating the term…
The present invention relates to a water-based ink containing at least pigment-containing water-insoluble crosslinked polymer particles (A), a polymer emulsion (B) and water, in which a water-insoluble crosslinked polymer constituting the crosslinked polymer particles (A) is obtained by subjecting a polymer that contains a constitutional unit derived from a carboxylic acid monomer having an acid value of not less than 200 mgKOH/g and a constitutional unit derived from a hydrophobic monomer, to crosslinking reaction with an epoxy compound, and a polymer constituting the polymer emulsion (B) contains a constitutional unit derived from a carboxylic acid monomer and a constitutional unit derived from a hydrophobic monomer. The water-based ink of the present invention is excellent in ejection stability and fastness of the printed characters or images while maintaining good optical density.
A water-based ink comprising at least pigment-containing water-insoluble crosslinked polymer particles (A), a polymer emulsion (B) and water, in which a water-insoluble crosslinked polymer constituting the crosslinked polymer particles (A) is obtained by subjecting a polymer that comprises a constitutional unit derived from a carboxylic acid monomer having an acid value of not less than 200 mg KOH/g and a constitutional unit derived from a hydrophobic monomer, to crosslinking reaction with an epoxy compound, a polymer constituting the polymer emulsion (B) comprises a constitutional unit derived from a carboxylic acid monomer and a constitutional unit derived from a hydrophobic monomer,
Dependencies are inferred from the claim text.