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Fluorescent dye-containing particles and manufacturing method thereof

A technology of fluorescent pigments and particles, which can be used in medical preparations containing active ingredients, chemical instruments and methods, luminescent materials, etc., and can solve problems such as limitation and increase in manufacturing cost.

Inactive Publication Date: 2011-11-23
NIPPON SHEET GLASS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the pigments that can be used are limited, and the production cost is also increased

Method used

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  • Fluorescent dye-containing particles and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] (1) Preparation of sol solution containing pigment

[0021] (2) Formation of particles using a pigment-containing sol solution

[0022] (3) Arbitrary drying of particles

[0023] (1) Preparation of sol solution containing pigment

[0024] The step of preparing a sol solution containing a dye can be divided into a step of preparing a sol solution and a step of dispersing an organic fluorescent dye and a water-soluble polymer in the sol solution.

[0025] An organic fluorescent dye is more easily decomposed when dispersed in a sol solution than when stored as a solid. Therefore, the organic fluorescent pigment can be added to the sol solution immediately before the spray drying method is used to form the particles. Accordingly, decomposition of the organic fluorescent dye is prevented as much as possible. Water-soluble polymers can be directly added to the sol solution, but it often takes time to dissolve them. Therefore, the water-soluble polymer may be dissolved in...

Embodiment 1

[0061] 1.7 g of acetic acid was added to a solution containing 60.0 g of tetramethoxysilane, 39 g of isopropanol, and 56.8 g of purified water, and stirred at room temperature for 12 hours to perform hydrolysis and polymerization to obtain a sol solution. 0.15 g of an organic fluorescent dye (D&C Orange No. 5), 3 g of polyvinylpyrrolidone (K15) and 50 g of isopropanol were added to 100 g of this sol solution, and stirred sufficiently to obtain a sol solution containing a dye. Particles were formed using the sol solution containing the dye using a spray dryer (MDL-050 manufactured by Fujisaki Electric Co., Ltd.). The obtained particles were dried at an atmospheric temperature of 150° C. for 4 hours to remove the solvent remaining in the particles. The average particle diameter of the obtained particles was 5.5 μm. In the measurement of the average particle diameter, a commercially available laser diffraction particle size distribution analyzer (Microtrac HRA manufactured by Ni...

Embodiment 2

[0063] 1.7 g of acetic acid was added to a solution containing 36.0 g of tetramethoxysilane, 21.4 g of methyltrimethoxysilane, 42 g of isopropanol, and 56.8 g of purified water, and stirred at room temperature for 1 hour. The obtained solution was left to stand in a thermostat at 60° C. for 24 hours to perform hydrolysis and polymerization to obtain a sol solution. 0.15 g of an organic fluorescent dye (D&C Orange No. 5), 3 g of polyvinylpyrrolidone (K15), and 50 g of isopropanol were added to 100 g of the sol solution, and stirred sufficiently to obtain a sol solution containing a dye. Using this sol solution containing a pigment, particles were formed by the same method as in Example 1. The obtained particles were dried at an atmospheric temperature of 150° C. for 4 hours. The average particle diameter of the obtained particles was 4.5 μm.

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Abstract

The fluorescent dye-containing particles contain a porous matrix configured primarily with a metal oxide, an organic fluorescent dye contained in the porous matrix, and a water-soluble polymer contained in the porous matrix. Such dye-containing particles can be manufactured by executing a step in which a dye-containing sol solution that includes a sol solution obtained by hydrolysis of a metal compound, an organic fluorescent dye and a water-soluble polymer is prepared, and a step in which particles are formed from the dye-containing sol solution by means of a spray-dry method.

Description

technical field [0001] The present invention relates to particles containing fluorescent pigments and a method for producing the same. Background technique [0002] Particles in which a silica matrix contains an organic fluorescent dye are known so far. Due to the low heat resistance of the organic fluorescent pigment, the organic fluorescent pigment is introduced into the silica matrix by a sol-gel method. However, the silica matrix produced by the sol-gel method is porous, so the disadvantage is that the organic fluorescent pigment is easily eluted from the silica matrix. [0003] As described in Japanese Patent Application Laid-Open No. 2003-270154, the method of incorporating chemically modified silicon into a matrix with a dye bound is effective for improving the dissolution resistance, the dispersibility of the dye, and the luminous intensity. However, the pigments that can be used are limited, and the production cost also increases. [0004] Japanese Unexamined Pat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06
CPCA61K8/8182A61K8/8176A61K8/585A61K2800/434A61Q1/00A61K8/731
Inventor 三上伸路
Owner NIPPON SHEET GLASS CO LTD
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