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US 2003/0199612 A1Published application
Radiation curable ink and preparation method and image forming method using the same
OwnerAtsushi Nakajimainventor
Life of this patent
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Abstract
A radiation-curable ink including, (a) a colorant dispersion containing a pigment and a diluent, the pigment being present in an amount of 20 to 95 weight % based on the total weight of the colorant dispersion; (b) a polymerizable compound; and (c) a polymerization initiator, wherein the radiation-curable ink has a viscosity of 6 to 500 mPa·s measured at 25° C. and comprises water in an amount of not more than 2.5 weight % based on the total weight of the radiation-curable ink measured with Karl Fisher method.
Claims12
A radiation-curable ink comprising:
- (a) a colorant dispersion containing a pigment and a diluent, the pigment being present in an amount of 20 to 95 weight % based on the total weight of the colorant dispersion;
- (b) a polymerizable compound;
- and
- (c) a polymerization initiator,
- wherein the radiation-curable ink has a viscosity of 6 to 500 mpa·s measured at 25° C. and comprises water in an amount of not more than 2.5 weight % based on the total weight of the radiation-curable ink measured with Karl Fisher method.
2 more elements
A method for producing a radiation-curable ink, comprising the steps of:
- (a) adding a pigment to a diluent containing at least one component selected from the group consisting of a resin, a dispersant and a first polymerizable compound in a vessel to obtain a pigment mixture, a weight ratio of the pigment being 20 to 95 weight % based on the total weight of the pigment mixture;
- (b) dispersing the pigment mixture to obtain a colorant dispersion;
- (c) adding a second polymerizable compound and a polymerization initiator to the colorant dispersion to obtain a radiation-curable ink precursor, provided that the first polymerizable compound and the second polymerizable compound may be the same or different with each other;
- (d) adjusting a content of water in the radiation-curable ink precursor to be not more than 2.5 weight % based on the total weight of the radiation-curable ink precursor;
- and
- (e) dispersing the radiation-curable ink precursor to obtain a radiation-curable ink having a viscosity of 6 to 500 mPa·s measured at 25° C.
3 more elements
Dependencies are inferred from the claim text.