Water base ink for inkjet recording

An inkjet recording, water-based technology, applied in ink, applications, household appliances, etc., can solve problems such as unsatisfactory rub resistance, and achieve the effect of excellent rub resistance and high printing density

Active Publication Date: 2011-10-05
KAO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above water-based inks have not been able to satisfy the high level of rub resistance required for photographic images in recent years

Method used

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Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1 and 2

[0209] In the reaction vessel, 20 parts of methyl ethyl ketone and 0.03 parts of polymer chain transfer agent (2-mercaptoethanol), 10% of 200 parts of the monomer mixture shown in Table 1 were added and mixed, and nitrogen replacement was fully carried out to obtain a mixed solution.

[0210] On the other hand, the remaining 90% of the monomer mixture shown in Table 1 was added to the dropping funnel, 0.27 parts of the above-mentioned polymer chain transfer agent (0.17 parts in Production Example 2), 60 parts of methyl ethyl ketone and 1.2 parts of A radical polymerization initiator (2,2'-azobis(2,4-dimethylvaleronitrile)) (1.1 parts in Production Example 2) was mixed together, and nitrogen substitution was sufficiently performed to obtain a mixed solution.

[0211] Under a nitrogen atmosphere, while stirring the mixed solution in the reaction vessel, the temperature was raised to 65° C., and the mixed solution in the dropping funnel was slowly added dropwise over 3 hours. Aft...

Embodiment 1

[0221] 25 parts of polymer obtained by drying the polymer solution obtained in Production Example 1 under reduced pressure were dissolved in 70 parts of methyl ethyl ketone, and 4.1 parts of neutralizing agent (5N aqueous sodium hydroxide solution) (neutralization degree 75%) and 230 parts were added thereto. Parts of ion-exchanged water, neutralized to form a salt base, and then add 75 parts of diazo pigment (yellow: Y) (C.I. Pigment Yellow 74 [P.Y.74], the average primary particle size is 40nm, manufactured by Sanyo Pigment Co., Ltd., Product name: FY7413), using Asada Iron Works (Co., Ltd.) ピコミル (dispersion medium: zirconium dioxide, temperature: 20 ° C, dispersion medium / dispersion liquid weight ratio: 8 / 2), at a peripheral speed of 15m / s, carry out 2 hours for dispersion. The obtained mixture was subjected to dispersion treatment 10 times by a Microfluidizer (manufactured by Microfluidics corp., trade name) under a pressure of 200 MPa.

[0222] Add 250 parts of ion-exc...

Embodiment 2

[0225] Aqueous ink 2 was obtained in the same manner as in Example 1, except that the processing conditions of Asada Tekko Co., Ltd. Picomil were changed to a peripheral speed of 8 m / s and a processing time of 12.5 hours.

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Abstract

A water base ink for inkjet recording that at printing on an exclusive paper, such as photographic paper, excels in scratch resistance; and a water base ink for inkjet recording that at printing on a plain paper, realizes high printing density. There is provided a water base ink for inkjet recording, containing dispersed particles of a pigment among which the number of dispersed pigment particles with a diameter of 0.57 [mu]m or greater is 1.210<7> particles / ml or less.

Description

technical field [0001] The present invention relates to an aqueous ink for inkjet recording. Background technique [0002] The inkjet recording method is a recording method in which ink droplets are directly sprayed from very fine nozzles onto a recording member and adhered to obtain characters and images. This method is very popular because it has many advantages such as easy full color and low cost, can use ordinary paper as a recording member, and is not in contact with the printed matter. [0003] In particular, in recent years, from the viewpoint of improving the weather resistance and water resistance of printed matter, materials using pigment-based inks as colorants have become mainstream (for example, refer to Patent Document 1). [0004] In addition, in Patent Document 2, for the purpose of improving storage stability, density unevenness during printing, and fixability after printing, an aqueous ink for inkjet recording containing a number-average particle Water-i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D11/02B41J2/01B41M5/00B82Y30/00C09D11/00C09D11/322
Inventor 竹村一成
Owner KAO CORP
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