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US 8,011,777 B2Granted
Ink set, ink jet recording method, ink cartridge, recording unit, and ink jet recording apparatus
AssigneeCanon Kabushiki Kaisha
InventorsYoshihisa Yamashita, Kenji Nishiguchi, Aki Takano
Life of this patent
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Abstract
An ink set includes a combination of a first ink and a second ink, the first ink containing a self-dispersion pigment having at least one hydrophilic group directly or through another atomic group bonded to the surface of the pigment particle, and ammonium ions, the second ink containing a pigment, a polymer having an acid value of 160 mg KOH/g or less, and alkali metal ions, wherein the first ink further contains a compound (A) selected from nonionic surfactants and/or a compound (B) selected from the group consisting of polyethylene glycol with an average molecular weight of 600 to 2,000, α,ω-alkanediol having six carbon atoms, and an imidazolidinone derivative.
Claims15
An ink set comprising:
- a first ink comprising a self-dispersion pigment having at least one hydrophilic group directly or through another atomic group bonded to the surface of the pigment particle, and ammonium ions;
- and
- a second ink comprising a pigment, a polymer having an acid value of 160 mg KOH/g or less, and alkali metal ions,
- wherein the first ink further comprises (A) a nonionic surfactant selected from the group consisting of a polyoxyethylene cetyl ether and a block copolymer of polyoxyethylene and polyoxypropylene and (B) a compound selected from the group consisting of polyethylene glycol with an average molecular weight of 600 to 2,000, α,ω-alkanediol having six carbon atoms, and an imidazolidinone derivative, and
- wherein, in the first ink, the ratio of the mass percentage of the nonionic surfactant (A) to the mass percentage of the compound (B), on the basis of the total mass of the ink, is 0.005 or more to 0.5 or less, and
- wherein the ratio of the ammonium ion concentration (mol/L) in the first ink to the alkali metal ion concentration (mol/L) in the second ink is greater than or equal to 0.33.
3 more elements
An ink set comprising:
- a first ink comprising a self-dispersion pigment having at least one hydrophilic group directly or through another atomic group bonded to the surface of the pigment particle, and ammonium ions;
- and
- a second ink comprising a pigment, a polymer having an acid value of 160 mg KOH/g or less, and alkali metal ions,
- wherein the first ink further comprises (A) a nonionic surfactant selected from the group consisting of a polyoxyethylene monoalkyl ether and a block copolymer of polyoxyethylene and polyoxypropylene and (B) a compound selected from the group consisting of polyethylene glycol with an average molecular weight of 600 to 2,000, α,ω-alkanediol having six carbon atoms, and an imidazolidinone derivative, and
- wherein the ratio of the ammonium ion concentration (mol/L) in the first ink to the alkali metal ion concentration (mol/L) in the second ink is greater than or equal to 0.33.
2 more elements
An ink set comprising:
- a first ink comprising a self-dispersion pigment having at least one hydrophilic group directly or through another atomic group bonded to the surface of the pigment particle, and ammonium ions;
- and
- a second ink comprising a pigment, a polymer having an acid value of 160 mg KOH/g or less, and alkali metal ions,
- wherein the first ink further comprises (A) a nonionic surfactant selected from the group consisting of a polyoxyethylene monoalkyl ether and a block copolymer of polyoxyethylene and polyoxypropylene and (B) a compound selected from the group consisting of polyethylene glycol with an average molecular weight of 600 to 2,000, α,ω-alkanediol having six carbon atoms, and an imidazolidinone derivative, and
- wherein, in the first ink, the ratio of the mass percentage of the nonionic surfactant (A) to the mass percentage of the compound (B), on the basis of the total mass of the ink, is 0.005 or more to 0.5 or less, and
- wherein the ratio of the ammonium ion concentration (mol/L) in the first ink to the alkali metal ion concentration (mol/L) in the second ink is greater than or equal to 0.33.
3 more elements
An ink set comprising:
- a first ink comprising a self-dispersion pigment having at least one hydrophilic group directly or through another atomic group bonded to the surface of the pigment particle, and ammonium ions;
- and
- a second ink comprising a pigment, a polymer having an acid value of 160 mg KOH/g or less, and alkali metal ions,
- wherein the first ink further comprises (A) a nonionic surfactant selected from the group consisting of a polyoxyethylene monoalkyl ether and a block copolymer of polyoxyethylene and polyoxypropylene and (B) a compound selected from the group consisting of polyethylene glycol with an average molecular weight of 600 to 2,000, α,ω-alkanediol having six carbon atoms, and an imidazolidinone derivative to prevent a deflection phenomenon caused by precipitation of the polymer in vicinity of ejection orifices for the first ink, and
- wherein, in the first ink, the ratio of the mass percentage of the nonionic surfactant (A) to the mass percentage of the compound (B), on the basis of the total mass of the ink, is 0.005 or more to 0.5 or less, and
- wherein the ratio of the ammonium ion concentration (mol/L) in the first ink to the alkali metal ion concentration (mol/L) in the second ink is greater than or equal to 0.33.
3 more elements
Dependencies are inferred from the claim text.