Printing ink
AssigneesFujifilm Speciality Ink Systems Limited, Fujifilm Imaging Colorants Limited
InventorsIris Coe, Brodyck Royles, Joanna Swiecicka-Fichou
Life of this patent
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Abstract
The present invention relates to an inkjet ink comprising: a continuous aqueous phase; a dispersed encapsulated pigment comprising pigment particles encapsulated by a cross-linked polymer coating having pendant hydrophilic groups including hydroxyl groups; and a cross-linking agent having two or more protected reactive groups, wherein the two or more protected reactive groups, when deprotected, are reactive to hydroxyl groups. The present invention also relates to a method of inkjet printing, a dispersion and a printed substrate.
Claims15
An inkjet ink comprising:
- a continuous aqueous phase;
- a dispersed encapsulated pigment comprising pigment particles encapsulated by a cross-linked polymer coating having pendant hydrophilic groups including hydroxyl groups;
- a cross-linking agent having two or more protected reactive groups, wherein the two or more protected reactive groups, when deprotected, are reactive to hydroxyl groups;
- wherein the ink contains less than 5% by weight of a binder resin, based on the total weight of the ink;
- and
- wherein the dispersed encapsulated pigment is present in an amount of 3 to 20% by weight, based on the total weight of the ink.
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(canceled)
A dispersion comprising:
- a continuous aqueous phase;
- a dispersed encapsulated pigment comprising pigment particles encapsulated by a cross-linked polymer coating having pendant hydrophilic groups including hydroxyl groups;
- a cross-linking agent having two or more protected reactive groups, wherein the two or more protected reactive groups, when deprotected, are reactive to hydroxyl groups;
- wherein the dispersion contains less than 5% by weight of a binder resin, based on the total weight of the dispersion;
- and
- wherein the dispersed encapsulated pigment is present in an amount of 3 to 20% by weight, based on the total weight of the dispersion.
Dependencies are inferred from the claim text.