Ink composition, two-pack curing ink composition set, and recording method and recorded matter using these

Inactive Publication Date: 2008-06-05
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0027]The ink composition of the present invention is an ink composition which contains at least a polymerizable compound, a photopolymerization initiator and a coloring material, and is free from an aqueous solvent, wherein the polymerizable compound comprises at least a urethane oligomer. Owing to these features, an ink composition having excellent film strength and additionally excellent curability and capable of forming a clear image can be provided.
[0028]Furthermore, the two-pack curing ink composition set of the present invention is a two-pack curing ink composition set comprising: an ink composition containing a coloring material; and a reaction liquid

Problems solved by technology

However, an ultraviolet curing ink composition using an aqueous solvent is that the aqueous medium does not contribute to curing.

Method used

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Examples

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examples

[0121]The present invention will be illustrated in greater detail by reference to the following Examples, but the invention should not be construed as being limited thereto.

examples 13 to 16

Preparation of Pigment Dispersion

[0135]In the Examples and the Comparative Examples, the pigment dispersion was prepared by the following method.

[0136]Allyl glycol (a product of Nippon Nyukazai Co.) as a monomer was added to 15% by weight of C. I. Pigment Black 7 (carbon black) as a coloring material and 3.5% by weight of Discol N-509 (a product of Dainichiseika Color & Chemicals Mfg. Co.) to make the whole 100% by weight, followed by mixing and stirring to obtain a mixture. This mixture was subjected to dispersion treatment together with zirconia beads (diameter 1.5 mm) for 6 hours using a sand mill (a product of Yasukawa Seisakusho).

[0137]Thereafter, zirconia beads were separated with a separator to obtain a black pigment dispersion.

[0138]Pigment dispersions corresponding to the respective colors, specifically cyan pigment dispersion 4 (C. I. Pigment Blue 15:3), magenta pigment dispersion (C. I. Pigment Violet 19) and yellow pigment dispersion (C. I. Pigment Yellow 155), were prep...

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Abstract

The present invention provides: an ink composition which contains at least a polymerizable compound, a photopolymerization initiator and a coloring material, and is free from an aqueous solvent, wherein the polymerizable compound comprises at least a urethane oligomer; a two-pack curing ink composition set comprising an ink composition containing a coloring material and a reaction liquid containing a photopolymerization initiator and capable of forming an image with an ink composition obtained by mixing the ink composition and the reaction liquid, wherein the ink composition after mixing contains at least a polymerizable compound, a photopolymerization initiator and a coloring material, and is free from an aqueous solvent, wherein the polymerizable compound comprises a urethane oligomer.

Description

FIELD OF THE INVENTION[0001]The present invention relates to an ink composition and a two-pack curing ink composition set, that cure by light such as ultraviolet rays. More particularly, it relates to an ink composition and a two-pack curing ink composition set, having excellent film strength and additionally excellent curability. Furthermore, the present invention relates to a recording method and recorded matter, using the ink composition or the two-pack curing ink composition set.BACKGROUND OF THE INVENTION[0002]Ink jet recording method is a printing method which conducts printing by flying small droplets of an ink composition and attaching the same to a recording medium such as papers. This ink jet recording method has the characteristic that high resolution and high definition image can be printed at high speed. In general, an ink composition used in an ink jet recording method comprises an aqueous solvent as a main component, and further contains a coloring component and a wet...

Claims

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Application Information

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IPC IPC(8): C08G18/02
CPCC09D11/30C09D11/101Y10T428/24802C09D11/102C08K5/235B05D3/067C09D11/322
Inventor NAKANO, KEITAROOYANAGI, TAKASHI
Owner SEIKO EPSON CORP
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