Colored composite microparticles, process for producing the colored composite microparticles, colorant, color filter and ink for ink-jet printing

Inactive Publication Date: 2008-10-23
TODA IND
View PDF7 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0030]The present invention has been attained in view of the above problems. An object of the present invention is to provide colored composite microparticles having a fine primary particle diameter and exhibiting a high tinting strength, an excellent dispersibility and an excellent light fastness, a process for producing the colored composite microparticles and a dispersion prepared by dispersing the colored composite microparticles in a solvent. A further object of the present invention is to provide a colorant for color filte

Problems solved by technology

However, there is a tendency that when the particle size of the pigment is lessened, the pigment is deteriorated in light fastness and heat resistance.
Thus, such a colorant capable of satisfying these contradictory properties at the same time has not been obtained until now.
Since the resultant organic pigment has a ζ potential close to zero, it may be difficult to attain an electrostatic repulsion effect thereof in vehicles.
Therefore, the organic pigment may fail to exhibit a good dispersibility and a good dispersion stability in vehicles.
In the method as described in Japanese Patent Application Laid-open (KOKAI) No. 2002-356625 in which an organic pigment is allowed to adher

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

example 1-1

Production of Colored Composite Microparticles

[0289]A 3-L beaker was charged with 200 g of the above-obtained composite particles (composite particles 1) and 2 L of a 0.65 mol / L sodium hydroxide aqueous solution (0.2 time a theoretical amount thereof capable of dissolving the silica particles as core particles and the surface-modifying agent) to prepare a solution having a pH value of 13.1. The resultant solution was stirred at 60° C. for 30 min and then subjected to filtration to separate a solid therefrom. The thus separated solid was washed with water and then dried, thereby obtaining colored composite microparticles.

[0290]It was confirmed that the thus obtained colored composite microparticles had an average primary particle diameter of 15 nm, a number-average particle diameter of 22 nm, a volume-average particle diameter of 78 nm, and a BET specific surface area value of 83.6 m2 / g. Also, the amount of silica enclosed in the colored composite microparticles was 1.06% by weight (...

example 2-1

Production of Water-Based Dispersion

[0291]15 parts by weight of the colored composite microparticles obtained in Example 1-1 and 100 parts by weight of water were added together with 100 g of 0.35 mmφ glass beads into a 140-mL glass bottle, and then dispersed for 2 hr by a paint shaker, thereby obtaining a water-based dispersion.

[0292]As a result, it was confirmed that the resultant water-based dispersion containing the colored composite microparticles had a number-average dispersed particle diameter of 19 nm, a volume-average dispersed particle diameter of 42 nm, a dispersion stability of Rank 5, a rate of change in viscosity of 4.8% and a specific absorption coefficient εw of 2.46.

example 3-1

Production of Solvent-Based Dispersion

[0293]15 parts by weight of the colored composite microparticles obtained in Example 1-1 and 100 parts by weight of PGMEA were added together with 100 g of 0.35 mmφ glass beads into a 140-mL glass bottle, and then dispersed for 2 hr by a paint shaker, thereby obtaining a solvent-based dispersion.

[0294]As a result, it was confirmed that the resultant solvent-based dispersion containing the colored composite microparticles had a number-average dispersed particle diameter of 19 nm, a volume-average dispersed particle diameter of 48 nm, a dispersion stability of Rank 5, a rate of change in viscosity of 4.7% and a specific absorption coefficient εw of 2.44.

[0295]According to the procedure for producing the composite particles 1 and Examples 1-1 to 3-1, the composite particles, the colored composite microparticles, the water-based dispersion and the solvent-based dispersion were produced. The essential production conditions as well as various properti...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

There are provided colored composite microparticles having a fine primary particle diameter and exhibiting a high tinting strength, an excellent dispersibility and an excellent light fastness; a process for producing the colored composite microparticles; and a dispersion of the colored composite microparticles. The colored composite microparticles are composite particles comprising silica and an organic pigment in which the silica is enclosed in the organic pigment and contained in an amount of 0.001 to 9% by weight (calculated as Si) based on the weight of the composite particles. The coloring composition for color filters is prepared by dispersing a colorant for color filters comprising the colored composite microparticles in a coloring composition base material, whereas the ink for ink-jet printing is prepared by dispersing a colorant for inks for ink-jet printing comprising the colored composite microparticles in an ink base solution. The colored composite microparticles have a high tinting strength and are excellent in dispersibility and light fastness, and therefore, can be suitably used in various applications such as ordinarily used paints, printing inks, etc., irrespective of an aqueous system or a solvent system.

Description

CROSS REFERENCES TO RELATED APPLICATIONS[0001]This is a continuation-in-part application of International Application No. PCT / JP2006 / 317543, filed 5 Sep. 2006, which designated the US and claims benefit of JP 2005-262254, filed 9 Sep. 2005, JP 2006-172462, filed 22 Jun. 2006 and JP 2006-194645, filed 14 Jul. 2006, the entire contents of each of which are hereby incorporated by reference.BACKGROUND OF THE INVENTION[0002]The present invention relates to colored composite microparticles, a dispersion containing the colored composite microparticles, a process for producing the colored composite microparticles, a colorant for color filters, a coloring composition for color filters containing the colorant, a color filter, a colorant for inks for ink-jet printing, and an ink for ink-jet printing. More particularly, the present invention relates to colored composite microparticles having a fine primary particle diameter, and exhibiting a high tinting strength, an excellent dispersibility an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C09D11/02G02B5/23
CPCB82Y30/00G02B5/201C01P2006/12C01P2006/22C01P2006/60C01P2006/62C01P2006/64C01P2006/65C09C1/0081C09C1/30C09C1/3063C09C1/3081C09C1/309C09D11/322C01P2004/64C09C1/28C09C3/08C09D17/00
Inventor HORIE, SHINJIMORII, HIROKONISHIKAWA, HIROFUMIHAYASHI, KAZUYUKI
Owner TODA IND
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap