Aqueous dispersion of colored particles, process for producing the same and ink for ink-jet recording
OwnerTakahiro Ishizuka, Kazue Sanoinventors
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Abstract
An aqueous dispersion of colored particles, the dispersion comprising: a water-insoluble colorant; an aqueous medium; a polymer obtained by a vinyl monomer; and a dispersant, wherein the dispersion has a high dispersion stability when the water-insoluble colorant is dispersed in the presence of the dispersant, and a latex having a poor dispersion stability is formed when the vinyl monomer is polymerized in the presence of the dispersant alone.
Claims12
An aqueous dispersion of colored particles, the dispersion comprising:
- a water-insoluble colorant;
- an aqueous medium;
- a polymer obtained by a vinyl monomer;
- and
- a dispersant,
- wherein the dispersion has a high dispersion stability when the water-insoluble colorant is dispersed in the presence of the dispersant, and a latex having a poor dispersion stability is formed when the vinyl monomer is polymerized in the presence of the dispersant alone.
A process for producing an aqueous dispersion of colored particles, the dispersion comprising a water-insoluble colorant, and the process comprises:
- dispersing the water-insoluble colorant in an aqueous medium in the presence of a dispersant;
- adding a vinyl monomer after the dispersing to form a mixture;
- and
- polymerizing the mixture,
- wherein the dispersion has a high dispersion stability when the water-insoluble colorant is dispersed in the presence of the dispersant, and a latex having a poor dispersion stability is formed when the vinyl monomer is polymerized in the presence of the dispersant alone.
An ink for ink-jet recording comprising water, a water-soluble organic solvent and a dispersion of colored particles, the dispersion comprising:
- a water-insoluble colorant;
- an aqueous medium;
- a polymer obtained by a vinyl monomer;
- and
- a dispersant,
- wherein the dispersion has a high dispersion stability when the water-insoluble colorant is dispersed in the presence of the dispersant, and a latex having a poor dispersion stability is formed when the vinyl monomer is polymerized in the presence of the dispersant alone.
Dependencies are inferred from the claim text.