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Inkjet ink, printed matters, and inkjet recording method

An inkjet ink, inkjet print head technology, applied in the field of inkjet ink, printed matter and an inkjet recording, can solve the problems of reduced ink output performance, insufficient dispersion stability of ink in pigments, etc.

Inactive Publication Date: 2007-11-07
TOSHIBA TEC KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inks developed so far are insufficient in the dispersion stability of the pigment
In some cases, the pigments in the ink will flocculate to produce coarse particles, thereby reducing the output performance of the ink

Method used

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  • Inkjet ink, printed matters, and inkjet recording method
  • Inkjet ink, printed matters, and inkjet recording method
  • Inkjet ink, printed matters, and inkjet recording method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] A yellow pigment dispersion was prepared according to the following formulation.

[0074] Yellow pigment (PY-180) 10wt.%

[0075] Dispersant (Avecia; Solsperse 32000) 3wt.%

[0076] Dispersant (Avecia; Solsperse 22000) 0.3wt.%

[0077] solvent

[0078] (DAICEL Chemicals; Celoxide 3000) 86.7wt.%

[0079] Beads with a diameter of 0.3 mm were loaded into a circulating sand mill, and a mixture of these raw materials was dispersed for 1 hour to obtain a dispersion liquid, which was then used to obtain a mixture formulated as follows, thereby forming a pigment containing 5 wt.% ink composition. Then, a compound represented by the following chemical formula (3) was added as a photosensitizer to the aforementioned ink composition to prepare the inkjet ink of this example.

[0080] Dispersion liquid 50.0wt.%

[0081] solvent

[0082] (DAICEL Chemicals; Celoxide 3000) 45.3wt.%

[0083] polymerization initiator

[0084] (DAICEL Chemicals; UVACURE1591) 3.6wt.%

[0085] Ph...

Embodiment 2

[0108] A cyan pigment dispersion was prepared according to the following formulation.

[0109] Pigment (Hostaperm Blue B2G) 10wt.%

[0110] Dispersant (Avecia; Solsperse 32000) 3wt.%

[0111] Main material

[0112] (DAICEL Chemicals; Celoxide 3000) 87wt.%

[0113] Beads with a diameter of 0.3 mm were loaded into a circulating sand mill, and a mixture of these raw materials was dispersed for 1 hour to obtain a dispersion liquid, which was then used to obtain a mixture formulated as follows, thereby forming a pigment containing 5 wt.% ink composition. Then, the compound used in Example 1 was added as a photosensitizer to the aforementioned ink composition to prepare the inkjet ink of this example.

[0114] Dispersion liquid 50.0wt.%

[0115] solvent

[0116] (DAICEL Chemicals; Celoxide 3000) 45.3wt.%

[0117] polymerization initiator

[0118] (DAICEL Chemicals; UVACURE1591) 3.6wt.%

[0119]Photosensitizer 1.1wt.%

[0120] In this example, the mixing ratio of the cation...

Embodiment 3

[0123] The same procedure described in the foregoing Example 2 was repeated except that a compound represented by the following chemical formula (4) was used as a photosensitizer, thereby preparing the inkjet ink of this example.

[0124]

[0125] Then, the prepared inkjet ink was subjected to photosensitivity test, corrosion test and storage stability test in the same manner as in Example 1. As a result, the ink thus cured exhibits a hardness of H. No substantial degree of electrode corrosion was found. The measured value of the average particle size of the pigment in the freshly prepared ink is 125 nm, while the measured value of the average particle size of the pigment after storage at 65° C. for 10 days is 136 nm, indicating that the flocculation of the pigment can be inhibited.

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Abstract

There is proposed an inkjet ink comprising a compound represented by the following general formula (1), a cationic photopolymerization initiator, a cationic photopolymerizable compound, and a pigment having an average particle diameter of 300 nm or less, wherein the cationic photopolymerization initiator is included at a ratio of 0.5% by weight to 8% by weight based on 100% by weight.of the cationic photopolymerizable compound, and the inkjet ink has a viscosity of 50 mPasec or less at ordinary temperature, (wherein R is a monovalent organic group having 1 to 5 carbon atoms, R 1 and R 2 may be the same or different and are individually hydrogen atom or alkyl group, alkyl sulfonyl group or alkoxy group each having 1 to 3 carbon atoms).

Description

technical field [0001] The present invention relates to an inkjet ink, printed matter and an inkjet recording method. technical background [0002] In recent years, there has been an increasing demand for inkjet type printing / recording apparatuses. That is, there is an increasing need to use such an inkjet type printing machine instead of a conventional printing machine using a printing plate, not only as a printer for office or home personal computers, but also for printing such as large posters, local advertising sheets And the printing of corporate leaflets requires a considerable amount of printed reproductions. Inkjet type printing machines are not only useful as on-demand printing machines capable of quickly responding to diverse needs, but also for high-speed printing of high-quality images. [0003] In the case of inkjet type printers, water-soluble inks containing water-soluble dyes as colorants have been mainly used so far because of the odor and safety of the in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/10B41J2/01B41M5/00C09D11/00C09D11/322C09D11/38
CPCC09D11/101
Inventor 石桥充后河内透秋山良造大津和彦广木正士
Owner TOSHIBA TEC KK