Recording liquid, ink set, method for recording an image, image-recording apparatus and recorded matter
A recording liquid is provided. The recording liquid includes particles A including a water-insoluble colorant and a compound containing a hydrophilic group, the particles A having a dispersion average particle diameter from 5 to 50 nm; and a self-dispersible polymer particles B including a constituent unit derived from an aromatic group-containing acrylate monomer.
1. A recording liquid comprising:
particles A including a water-insoluble colorant and a compound containing a hydrophilic group, the particles A having a dispersion average particle diameter from 5 to 50 nm and the compound containing a hydrophilic group being a polymer dispersant; and
self-dispersible polymer particles B including a constituent unit derived from an aromatic group-containing acrylate monomer, wherein the compound containing a hydrophilic group has an acid value, and the self-dispersible polymer particles B have an acid value, and
wherein the acid value of the self-dispersible polymer particles B is smaller than the acid value of the compound containing a hydrophilic group.
2. The recording liquid according to claim 1 , wherein the compound containing a hydrophilic group is a compound containing at least one hydrophilic group selected from the group consisting of a carboxyl group, a sulfonic acid group, and a phosphoric acid group.
3. The recording liquid according to claim 1 , wherein the hydrophilic group is a carboxyl group.
4. The recording liquid according to claim 1 , wherein the self-dispersible polymer particles B comprise a constituent unit including a carboxyl group.
5. The recording liquid according to claim 4 , wherein the self-dispersible polymer particles B have an acid value from 20 to 150 mg KOH/g.
6. The recording liquid according to claim 1 , wherein the content ratio of the constituent unit derived from an aromatic group-containing acrylate monomer is from 10% by mass to 95% by mass.
7. The recording liquid according to claim 1 , wherein the aromatic group-containing acrylate monomer is phenoxyethyl acrylate.
8. The recording liquid according to claim 1 , wherein the self-dispersible polymer particles B have a dispersion average particle diameter from 1 to 50 nm.
9. An ink set comprising a recording liquid, wherein the recording liquid comprises:
particles A including a water-insoluble colorant and a compound containing a hydrophilic group, the particles A having a dispersion average particle diameter from 5 to 50 nm and the compound containing a hydrophilic group being a polymer dispersant; and
self-dispersible polymer particles B including a constituent unit derived from an aromatic group-containing acrylate monomer,
wherein the compound containing a hydrophilic group has an acid value, and the self-dispersible polymer particles B have an acid value, and
wherein the acid value of the self-dispersible polymer particles B is smaller than the acid value of the compound containing a hydrophilic group.