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Green coloring composition for filter and filter

A coloring composition and color filter technology, which is applied in the field of color filters, can solve problems such as poor leveling, poor fluidity, and inability to obtain a coating film with uniform film thickness, and achieve high contrast ratio and brightness. The effect of good stability and reduction of existing defects

Active Publication Date: 2009-05-27
TOYO INK SC HOLD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A poorly dispersed coloring composition tends to agglomerate pigment particles over time, resulting in high viscosity and thixotropy
Viscosity increase and poor fluidity of this coloring composition cause problems in production operations or cause various problems in product value
For example, the color filter segments of a color filter are generally formed by spin-coating a coloring composition on a glass substrate, the coloring composition dispersing a pigment in a pigment carrier containing a monomer and a resin, and if a high-viscosity, flowable If a coloring composition with poor performance is used, a coating film with uniform film thickness cannot be obtained due to poor spin coating properties, poor leveling, etc., so it is not preferred.
[0023] In addition, zinc halide phthalocyanine pigments are known to be chemically different from conventional copper halide phthalocyanine pigments and are difficult to disperse.
Therefore, it is difficult to disperse the zinc halide phthalocyanine pigment stably while maintaining its excellent color characteristics using only a dispersant suitable for the existing copper halide phthalocyanine pigment or other pigments.
[0024] On the other hand, in order to obtain a high-fluidity zinc halide phthalocyanine pigment dispersion, it is necessary to use a large amount of dispersant that will have a bad influence on each resistance. In order to maintain a high pigment concentration, it is necessary to reduce the amount of pigment that maintains each resistance. The amount of carrier components makes it difficult to balance the properties of resistance, fluidity and color
[0025] Furthermore, the zinc halide phthalocyanine pigment is different from the existing copper halide phthalocyanine pigment in that the solubility of the pigment itself is different, so for the most suitable solvent for dispersing the copper halide phthalocyanine pigment, the affinity of the zinc halide phthalocyanine pigment with it is too high. Well, when these solvents are used to disperse zinc phthalocyanine pigments, the pigment itself dissolves in the solvent, and there is a problem that a dispersion with high contrast ratio and high brightness cannot be obtained
[0026] Furthermore, for the coloring compositions (Patent Documents 1 to 3) using a zinc halide phthalocyanine pigment dispersed in a solvent used for dispersing a copper halide phthalocyanine pigment, due to the above-mentioned spin coating method or die coating Such a coating method and the properties of the coating liquid used in it have the disadvantages of uneven film thickness or uneven stripes.

Method used

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  • Green coloring composition for filter and filter
  • Green coloring composition for filter and filter
  • Green coloring composition for filter and filter

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0263] [Preparation of color filter]

[0264] The color filter of the present invention can be produced by a printing method or a photolithography method.

[0265] The formation of color filter segments using the printing method can be patterned only by repeatedly printing and drying the coloring composition prepared as printing ink. Therefore, as a production method of color filters, mass production at low cost Excellent. Furthermore, with the development of printing technology, it is possible to print fine patterns with high dimensional accuracy and smoothness. For printing, it is preferable to form such a composition that the ink is not dried but cured on the printing plate or the surface layer (blanket). In addition, it is also important to control the fluidity of the ink on the printing press, and it is also possible to adjust the viscosity of the ink by using a dispersant or an extender pigment.

[0266] When the color filter segment is formed by photolithography, it ...

Embodiment

[0277] Hereinafter, although this invention is demonstrated based on an Example, this invention is not limited to these Examples. In addition, in Examples and Comparative Examples, "parts" means "parts by weight". In addition, Mn and Mw represent number average molecular weight and weight average molecular weight, respectively.

[0278] (1) Average molecular weight of basic resin type dispersant (a)

[0279] In the following examples and comparative examples, the number average molecular weight (Mn) and weight average molecular weight (Mw) of the basic resin type dispersant are HLC-8320GPC (manufactured by Tosoh Co., Ltd.) as the device, using SUPER-AW3000 The polystyrene-equivalent number average molecular weight (Mn) and weight average molecular weight (Mw) were measured using N,N-dimethylformamide of 30 mM triethylamine and 10 mM LiBr as an eluent as a column.

[0280] (2) Amine value

[0281] The amine value of the basic resin type dispersant is a value obtained by conv...

no. 1 Embodiment approach

[0287] The green coloring composition containing the said basic resin type dispersant (a) as an essential component is demonstrated using an Example (Example I series) and a comparative example (Comparative Example I series).

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Abstract

The present invention relates to a green colored composition for color filter and color filter. The invention discloses a green colored composition for color filter comprising: (A) a dye component containing at least ZnPc halogenide dye, and (B) a dye carrier containing resin, its precursor and mixture of them, the composition also contains (a) alkalescent resin disperser selected from amine value of 35-100mg KOH / g, (b) pigment derivative with alkalescent substituent and (c) at least one of mixed organic solvents, the mixed organic solvents contains organic solvent (c1) with solubility parameter (SP value) of 8.0-10.0 (cal / cm3)1 / 2 and boilling point of 140-159 at 760mmHg; and organic solvent (c2) with solubility parameter (SP value) of 8.0-10.0 (cal / cm3)1 / 2 and boilling point of 160-200 at 760mmHg.

Description

technical field [0001] The present invention relates to a green coloring composition for color filters used in the production of color filters used in color liquid crystal display devices, color pickup tube elements, and the like, and to color filters formed using the same. Background technique [0002] A liquid crystal display device is a display device that displays by controlling the degree of polarization of light passing through the first polarizing plate and controlling the amount of light passing through the second polarizing plate through a liquid crystal layer sandwiched between two polarizing plates. A type of nematic (TN) type liquid crystal is becoming a mainstream type. Liquid crystal display devices can perform color display by placing a color filter between two polarizing plates. In recent years, since color filters have begun to be used in TVs and personal computer monitors, etc., their high contrast ratio and high brightness requirements have increased. ...

Claims

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Application Information

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IPC IPC(8): G03F7/004C09B67/20G02B5/20
CPCG02B5/20G03F7/004G03F7/027G03F7/028
Inventor 宫泽由昌中村高士吉泽俊启西田充志有吉泰
Owner TOYO INK SC HOLD CO LTD
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