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inkjet ink

A kind of ink and inkjet technology, which is applied in the direction of ink, application, household utensils, etc., can solve the problems of ink gelation, ink is not easy, etc., and achieve excellent solvent resistance, excellent cleaning resistance, and good solvent resistance. Effect

Active Publication Date: 2021-11-05
KISHU GIKEN INDS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the above-mentioned method using a curing agent has a problem that even if the curability after printing is good, the gelation of the ink is likely to occur due to temperature changes in the inkjet printer, etc., and it is not easy to obtain a stable ink.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] 15 parts by weight of poly-p-vinylphenol resin (weight average molecular weight Mw=11000) and 3 parts by weight of Solsperse 38500 (dispersant: manufactured by Lubrizol Corporation) were dissolved in 58.5 parts by weight of methyl ethyl ketone and 5 parts by weight of cyclopentanone Parts, make a solution, add titanium oxide (Al·Si treatment, rutile TiO 2 , average particle diameter of 0.24 μm) 10 parts by weight, stirred and mixed, and the mixed solution was supplied to a horizontal sand mill to disperse titanium oxide.

[0090] To this dispersion liquid, 7 parts by weight of blocked isocyanate using dimethylpyrazole as a blocking agent was added and mixed, and 1.5 parts by weight of tetrabutylammonium hexafluorophosphate was further added and mixed with high-speed stirring.

[0091] Then, the mixed dispersion liquid was filtered through a filter with a mesh size of 1.0 μm to obtain an ink for an inkjet printer.

[0092] It should be noted that in the trial production...

Embodiment 2～10、 comparative example 1、2

[0094] Each ink of Examples 2-10 and Comparative Examples 1 and 2 was prepared in the same manner as in Example 1 except that various raw materials were changed as shown in Table 1 below. In Table 1, the prescription of Example 1 is also described together.

[0095] It should be noted that in Table 1, the numerical values ​​given in the prescription column all represent weight % relative to the total weight of the ink.

[0096] Table 1

[0097]

[0098] 〔Physical property evaluation of ink〕

[0099] The physical properties of the ink were evaluated and described in Table 1 above.

[0100] The details of the evaluation items are as follows.

[0101]

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PUM

PropertyMeasurementUnit
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Abstract

The present invention provides an inkjet ink which is excellent in ejection stability in an inkjet printer, and which is also excellent in adhesion to the surface of an object to be printed, cleaning resistance after printing, and solvent resistance. In particular, regarding ejection stability, stable ejection performance is exhibited even when using an inkjet printer with a small nozzle diameter. In addition, regarding solvent resistance, not only exhibits good solvent resistance against alcohol, but also exhibits good solvent resistance against acetone, etc. Other solvents also exhibit good solvent resistance. The inkjet ink of the present invention contains a ketone-based solvent as a main component of the solvent, and further contains a colorant, poly-p-vinylphenol resin, and blocked isocyanate.

Description

technical field [0001] The present invention relates to inkjet inks used in inkjet printers. Background technique [0002] Generally, an inkjet printer capable of easily printing variable information in a non-contact manner is commonly used as a recording method on plastic, glass, metal, or the like. As the inkjet ink used in the above-mentioned inkjet printer, those obtained by dissolving oily dyes, vinyl chloride resins, vinyl acetate resins, acrylic resins, butyral resins, etc. in solvents such as methyl ethyl ketone and alcohol are known. substance. [0003] However, since the ink using the above resin is designed to provide sufficient stability and resolubility when ejected using an inkjet printer, the stability in the printer is very good, but the ink on the surface of the printed matter The solvent resistance of the formed printed matter is problematic, and the ink is likely to elute even if the ink is sufficiently dried. [0004] Therefore, in order to obtain solv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/36C09D11/38
CPCC09D11/36C09D11/38
Inventor 阪上智洋山本智
Owner KISHU GIKEN INDS
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