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Active energy ray-curable ink composition

A technology of energy ray curing and ink composition, applied in the direction of ink, copying/marking method, printing, etc., can solve the problems of photopolymerization initiator remaining, not being cured, limiting, etc., and achieve good pigment dispersion and good printing Quality, good curing effect

Inactive Publication Date: 2007-08-08
HITACHT MAXELL LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the UV-curable ink composition of the above-mentioned prior art usually has a low monomer reactivity, and when the cumulative light intensity is 150mJ / cm 2 Under the lower energy, it will be hindered by oxygen and cannot be fully cured, so it is limited when used in high-speed printing applications.
[0009] If the amount of the photopolymerization initiator is increased, the curability will be improved, but the solubility of the photopolymerization initiator in the monomer is limited, so not only cannot a certain amount of the photopolymerization initiator be mixed, but sufficient curability cannot be obtained, and if With a large amount of photopolymerization initiator, unreacted photopolymerization initiator will remain, which will easily have a bad influence on the physical properties of the cured film

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] Measure 20.0 parts of HOSTAPERM BLUE P-BFS (manufactured by Clariant, copper phthalocyanine blue pigment) and 33.3 parts of DISPERBYK168 as a pigment dispersant (manufactured by BYK, amine-based polymer dispersant) in a 100cc plastic bottle ), 46.7 parts of dimethylacrylamide as an acrylamide derivative (DMAA, manufactured by Kohin Co., Ltd.), and 100 parts of zirconia beads with a diameter of 0.3 mm were dispersed for 2 hours by a paint conditioner (manufactured by Toyo Seiki Co., Ltd.).

[0072] To 25.0 parts of the dispersion thus obtained were added 45.5 parts of DMAA as an acrylamide derivative, 19.5 parts of Lightacrylate DPE-6A (manufactured by Kyoeisha Chemical Co., Ltd., dipentaerythritol hexaacrylate, hexafunctional) as a polyfunctional monomer. monomer), 9.0 parts of IRGACURE907 (manufactured by Ciba Specialty Chemicals, 2-methyl-1-(4-methylthiophenyl)-2-morpholino-1-propanone) as a photopolymerization initiator, 1.0 parts of DET-X (manufactured by Nippon Kay...

Embodiment 2

[0074] In a 100cc plastic bottle, measure 20.0 parts of HOSTAPERM PINK EB trans (manufactured by Clariant, quinacridone pigment), 46.7 parts of DISPERBYK168 as a pigment dispersant, 33.3 parts of DMAA as an acrylamide derivative, 100 parts of diameter 0.3 mm zirconia beads were dispersed for 2 hours with a paint conditioner (manufactured by Toyo Seiki Co., Ltd.).

[0075] Using the dispersion thus dispersed, an ultraviolet curable ink composition B was prepared in the same manner as in Example 1 below.

Embodiment 3

[0077] In a 100cc plastic bottle, measure 20.0 parts of E4GN-GT (manufactured by Bayer, nickel-containing azo pigment), 26.6 parts of DISPERBYK168 as a pigment dispersant, 53.4 parts of DMAA as an acrylamide derivative, and 100 parts of a diameter of 0.3mm The zirconia beads were dispersed for 2 hours by a paint conditioner (manufactured by Toyo Seiki Co., Ltd.).

[0078] Using the dispersion thus dispersed, an ultraviolet curable ink composition C was prepared in the same manner as in Example 1 below.

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Abstract

Disclosed is an energy ray-curable ink composition containing a coloring agent, a monomer and a photopolymerization initiator. As the monomer, 10-90% by weight of an acrylamide derivative is contained relative to the total weight of the ink composition, and the viscosity of the ink composition as a whole is 3-35 mPas at 25 DEG C. This ink composition has low viscosity without being diluted with a diluent, while exhibiting good storage stability and good pigment dispersibility in cases where the coloring agent is composed of a pigment. The ink composition further has excellent stability in continuous discharge to a recording medium, and exhibits good curability even when the energy is low and the integrated amount of light is not more than 150 mJ / cm2. Furthermore, the ink composition enables to obtain good print quality on a non-absorptive recording medium, and in particular, it exhibits excellent adhesion to a recording medium base.

Description

technical field [0001] The present invention relates to an energy ray curable ink composition, an ink composition mainly printed by an inkjet recording method and cured by irradiating energy ray, especially an ultraviolet curable ink composition. Background technique [0002] The inkjet recording method uses pressure, heat, electric field, etc. as a driving source, and prints by ejecting liquid ink from a nozzle to a recording medium. This recording method is low in running costs, can obtain high-quality printed matter, and can use various inks such as water-based inks and oil-based inks, so the market has been expanding in recent years. [0003] Recently, since the image forming method of the inkjet method can obtain the same quality image quality as that of the silver halide photography method at a very low cost, it is economically more economical for applications that require frequent replacement, such as large posters that require a large image area. big advantage. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/00B41J2/01B41M5/00C09D11/033C09D11/037C09D11/10C09D11/101C09D11/106C09D11/322C09D11/326C09D11/328C09D11/38
CPCC09D11/101B41J2/01B41M5/00
Inventor 鬼头克幸鹰尾长幸
Owner HITACHT MAXELL LTD
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