PIGMENT DISPERSION, RECORDING INK, INK CARTRIDGE, INK-JET RECORDING METHOD AND INK-JET RECORDING APPARATUS
First Claim
1. A recording ink, comprising a pigment dispersion, a surfactant, a water-dispersible resin, a humectant and water,wherein the pigment dispersion comprises a pigment, a pigment dispersant, a polymer dispersion stabilizer and water,wherein the pigment dispersant is an anionic surfactant or a nonionic surfactant, having an HLB value of 10 to 20,wherein the polymer dispersion stabilizer is an alpha-olefin/maleic anhydride copolymer of formula (1):
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Abstract
A recording ink containing a pigment dispersion, a surfactant, a water-dispersible resin, a humectant and water. The pigment dispersion contains a pigment dispersant, which is an anionic surfactant or a nonionic surfactant having an HLB value of 10 to 20. The pigment dispersion also contains a polymer dispersion stabilizer, which is an alpha-olefin/maleic anhydride copolymer expressed by the formula (1) below, where R is an alkyl group having 6 to 25 carbon atoms, and where the mass average molecular weight of the copolymer is 5000 to 20000. An ink cartridge, an inkjet recording method, an inkjet recording apparatus, and an ink recorded matter, each employing the recording ink, are also provided.
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Citations
20 Claims
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1. A recording ink, comprising a pigment dispersion, a surfactant, a water-dispersible resin, a humectant and water,
wherein the pigment dispersion comprises a pigment, a pigment dispersant, a polymer dispersion stabilizer and water, wherein the pigment dispersant is an anionic surfactant or a nonionic surfactant, having an HLB value of 10 to 20, wherein the polymer dispersion stabilizer is an alpha-olefin/maleic anhydride copolymer of formula (1):
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11. A recording ink, comprising a water-dispersible colorant, a water-dispersible resin, a humectant and water,
wherein the water-dispersible colorant is a pigment dispersion comprising a pigment, a pigment dispersant and a polymer dispersion stabilizer, wherein the pigment dispersant is an anionic surfactant or a nonionic surfactant, having an HLB value of 10 to 20, wherein the polymer dispersion stabilizer is: (i) an alpha-olefin/maleic anhydride copolymer of formula (1); - View Dependent Claims (13, 14, 15, 16)
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12. A recording ink, comprising a water-dispersible colorant, a water-dispersible resin, a humectant and water,
wherein the water-dispersible colorant is a pigment dispersion comprising a pigment and a polymer dispersion stabilizer, wherein a surface of the pigment comprises a hydrophilic group, and the pigment is self-dispersible in water in the absence of a dispersant, wherein the polymer dispersion stabilizer is: (i) an alpha-olefin/maleic anhydride copolymer of formula (1);
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17. An ink cartridge, comprising a container housing a recording ink,
wherein the recording ink comprises a pigment dispersion, a surfactant, a water-dispersible resin, a humectant and water, wherein the pigment dispersion comprises a pigment, a pigment dispersant, a polymer dispersion stabilizer and water, wherein the pigment dispersant is an anionic surfactant or a nonionic surfactant, having an HLB value of 10 to 20, wherein the polymer dispersion stabilizer is an alpha-olefin/maleic anhydride copolymer of formula (1):
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18. An ink-jet recording method, comprising ejecting a recording ink by applying a stimulus to the recording ink, wherein the ejected ink records an image,
wherein the recording ink comprises a pigment dispersion, a surfactant, a water-dispersible resin, a humectant and water, wherein the pigment dispersion comprises a pigment, a pigment dispersant, a polymer dispersion stabilizer and water, wherein the pigment dispersant is an anionic surfactant or a nonionic surfactant, having an HLB value of 10 to 20, wherein the polymer dispersion stabilizer is an alpha-olefin/maleic anhydride copolymer of formula (1):
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19. An ink-jet recording apparatus, comprising an ink ejecting unit configured to eject a recording ink so as to record an image, by applying a stimulus to the recording ink,
wherein the recording ink comprises a pigment dispersion, a surfactant, a water-dispersible resin, a humectant and water, wherein the pigment dispersion comprises a pigment, a pigment dispersant, a polymer dispersion stabilizer and water, wherein the pigment dispersant is an anionic surfactant or a nonionic surfactant, having an HLB value of 10 to 20, wherein the polymer dispersion stabilizer is an alpha-olefin/maleic anhydride copolymer of formula (1):
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20. An ink recorded matter, comprising an image formed from a recording ink on a recording medium,
wherein the recording ink comprises a pigment dispersion, a surfactant, a water-dispersible resin, a humectant and water, wherein the pigment dispersion comprises a pigment, a pigment dispersant, a polymer dispersion stabilizer and water, wherein the pigment dispersant is an anionic surfactant or a nonionic surfactant, having an HLB value of 10 to 20, wherein the polymer dispersion stabilizer is an alpha-olefin/maleic anhydride copolymer of formula (1):
Specification