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Ink composition

An ink composition and the technology of the composition are applied in the directions of inks, household appliances, luminescent materials, etc., which can solve the problems of impracticality, low luminous brightness, and no records, and achieve the effects of improving power generation efficiency and good dispersion stability.

Inactive Publication Date: 2011-06-22
KEIO UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this nano-sized phosphor is applied to a color display in Patent Document 1, and it is not described at all about its application to an ink.
In addition, in Patent Document 2, the average particle size of the vanadate particles of the rare earth element as the phosphor is as small as 6 nm or less, so the light emission brightness is low, it is not practical, and it is difficult to redisperse the primary particles.
In addition, there is no description at all about the application to ink

Method used

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Examples

Experimental program
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Embodiment

[0085] Hereinafter, the present invention will be described in more detail using examples and the like, but the scope of the present invention is not limited by these examples. In addition, in Examples, unless otherwise specified, "part" and "%" represent a mass basis.

reference example 1

[0087] In a 200 ml 4-necked flask, a condenser as a reflux device, a thermometer, and a stirring device were installed, and the flask was placed in a water bath. Add 40.0ml of water, 1.00g (2.6mmol) of yttrium nitrate hexahydrate, 0.09g (0.2mmol) of europium nitrate hexahydrate, and 0.62g of trisodium citrate dihydrate into the flask, and stir at 60°C for 2 hours to prepare Solution 1.

[0088] In addition, measure 40.0 ml of water whose pH was adjusted to 12.5 with sodium hydroxide, add 0.55 g (3.0 mmol) of sodium orthovanadate to it, and dissolve it to prepare solution 2, and add solution 2 dropwise to the solution containing 1 in the above-mentioned 3-neck flask.

[0089]After completion of the dropwise addition, stirring was performed at 60° C. for 3 hours. The pH immediately after the dropwise addition was 8.5. Then, it was cooled to room temperature to obtain a slightly yellowish white suspension in water. The dispersion liquid obtained by processing with an ultrason...

reference example 2

[0093] In a 200 ml 4-necked flask, a condenser as a reflux device, a thermometer, and a stirring device were installed, and the flask was placed in a water bath. 40.0ml of water, 0.10g (0.3mmol) of yttrium nitrate hexahydrate, and 0.05g (0.1mmol) of terbium nitrate hexahydrate were added to the flask, and stirred at 80°C for 1 hour, then 0.19g of oxalic acid was added, and the reaction was carried out at 80°C. After stirring for 2 hours, solution 1 was prepared.

[0094] In addition, 40.0 ml of water whose pH was adjusted to 12.5 with sodium hydroxide was measured with a 100 ml measuring cup, 0.06 g (0.3 mmol) of sodium orthovanadate was added thereto, and dissolved to prepare solution 2, and the obtained solution 2 Add dropwise to the 3-necked flask containing solution 1.

[0095] After completion of the dropwise addition, stirring was performed at 80° C. for 3 hours. The pH immediately after the dropwise addition was 8.2. Then, it was cooled to room temperature to obtain ...

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Abstract

Disclosed is an ink composition comprising a microparticulate phosphor which can emit a high-brightness fluorescent light by ultraviolet ray and has a predetermined nanosize. The ink composition comprises a microparticulate phosphor represented by the formula: YVO4:A [wherein A represents a rare earth metal other than yttrium] and capable of emitting a fluorescent light upon the excitation with ultraviolet ray. The phosphor has an average primary particle diameter of 30 to 400 nm and is not burned. The phosphor can be produced by, for example, mixing and reacting a composition (I) comprising an yttrium compound, a compound of a rare earth metal other than yttrium and a complex-forming compound in water with a composition (II) comprising a vanadium compound in water.

Description

technical field [0001] The present invention relates to an ink composition containing a nano-sized particulate phosphor that emits fluorescence with high luminance by ultraviolet rays. Background technique [0002] Currently, various inorganic phosphors that emit fluorescence when irradiated with active energy rays such as ultraviolet rays have been used in the fields of art and decoration or in the field of security. Usually, phosphor powder is mixed with paint or ink, and the object is painted or screen-printed. Specifically, in the field of art and decoration, on the walls or ceilings of theme parks, hotels, underground passages, trains, etc., artists or craft coating technicians use the above-mentioned paints containing phosphors to draw decorative paintings, etc., by using Ultraviolet rays are irradiated by backlights, etc. to reveal vivid fluorescent color paintings. In addition, in the security field, screen printing is performed as a special method of use. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/00C09D11/02C09K11/82
CPCC09K11/7776C09D11/322C09K11/7794C09D11/50C09D11/101C09D11/037
Inventor 矶部彻彦竹下觉河野充新仓诚司
Owner KEIO UNIV
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