KR20060001357A - A uniform layer colored film and the method of preparing the same - Google Patents

Abstract

A monolayer colored film comprising a tetraaza porphyrin derivative and a polymer for forming a transparent substrate is disclosed. The tetraaza porphyrin compound may be represented by Formula 1: <Formula 1>

Wherein R ₁ , R ₂ , R ₃ , and R ₄ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, and a substituted 1 to 20 carbon atoms. Or an unsubstituted aryl group, a substituted or unsubstituted heteroaryl group having 1 to 20 carbon atoms, and a halogen atom, and M is nickel (Ni), magnesium (Mg), manganese (Mn), cobalt (Co) And copper (Cu).

Tetraaza porphyrin, photoselector, color film, PDP filter, 590 filter

Description

A uniform layer colored film and the method of preparing the same

 Fig. 1 shows a plasma display panel employing a filter using a single layer color filter of the present invention.

The present invention relates to a colored film, and more particularly, to a single-layer colored film and a method for manufacturing the same, in which a photoselective agent is colored to absorb a wavelength of a specific region.

Colored films containing photoselectors are used to block visible light and they can also be used to color some surfaces of display devices or other optical devices.

Plasma display panel (PDP) is a thin light emitting display device which is easy to be enlarged as compared with other image display devices, and is considered to have the most suitable characteristics for high quality digital television. However, the plasma display device has a problem in that color purity characteristics are deteriorated due to unnecessary light emission of near infrared rays caused by plasma generated by plasma light emission and circuits and plasma of an inert gas used for screen emission. Therefore, a filter is installed on the front surface of the plasma display device in order to not only prevent harmful effects of the human body due to electromagnetic waves and near infrared rays generated in the plasma display device and malfunction of precision instruments, but also to reduce surface reflection and improve color purity.

The filter used in the plasma display device generally uses a method of treating a conductive film or a metal mesh on a transparent glass or plastic substrate, and laminating a near infrared ray blocking and antireflection film. The filter adopts a film that absorbs neon wavelengths near 590 nm in the visible region to correct orange color and further enhances color clarity. This is called a 590 nm film or a Ne film.

Two methods can be mentioned for producing the 590 nm film.

In one method, the photoselective agent may be prepared by mixing the polymer material polymerized with the organic solvent. Films thus prepared generally have high transparency and low haze, but when outdoor use is prolonged, the light selector decomposes with prolonged exposure to ultraviolet rays and light transmittance is reduced.

Alternatively, a photoselective agent, an organic solvent, and a polymer binder component are respectively mixed to produce a separate film, and the film is added to a base film to form. However, this method additionally requires the application of liquid and gaseous phases, which results in a longer process.

On the other hand, as a photo-selective agent used to manufacture the 590nm film is known to have excellent performance, such as tetraaza porphyrin derivatives, but the compound is to be prepared by applying a coating material to the base film by making a separate coating material There was a problem.

In order to solve the above problems, an object of the present invention is to provide a monolayer colored film having excellent light transmittance using a tetraaza porphyrin derivative as a light selector. In addition, the present invention provides a method for manufacturing a single layer color film and a plasma display panel employing the same.

In order to achieve the above object, the present invention

It provides a single layer colored film comprising a tetraaza porphyrin derivative and a polymer for forming a substrate.

The tetraaza porphyrin compound may be represented by Formula 1 or Formula 2:

,

,

Wherein R ₁ , R ₂ , R ₃ and R ₄ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, an aryl group having 1 to 20 carbon atoms , A heteroaryl group having 1 to 20 carbon atoms and a halogen atom,

M is selected from the group consisting of nickel (Ni), magnesium (Mg), manganese (Mn), cobalt (Co) and copper (Cu).

The tetraaza porphyrin content is 0.1 to 20% by weight based on the total content including the polymer for forming the transparent substrate.

In one embodiment of the present invention, the polymer for forming the transparent substrate is a group consisting of polyethylene terephthalate, acrylic resin, methacryl resin, vinyl acetate resin, thiol-olefin resin, silicone resin and polyester resin, and polycarbonate resin. It is preferably selected from.

In addition, the thickness of the film is preferably 50 to 300um.                     

It is preferable that the transmittance | permeability of the said film is 30 to 70% of minimum transmittance in the wavelength range of 400-780 nm in visible region.

In order to achieve the above another object, the present invention,

Mixing a polymer for forming a transparent substrate, an organic solvent, and tetraaza porphyrin as a photoselective agent (A); Homogenizing the mixture by applying heat (b); Extruding the mixture (c); It provides a method for producing a single-layer colored film comprising; and (d) cooling the resultant and biaxially stretching the resulting product.

In order to achieve the above another object, the present invention,

Provided is a plasma display panel including a filter employing the single layer coloring film.

Hereinafter will be described in detail a single-layer color film containing a photoselective agent according to the present invention.

The tetraaza porphyrin derivative of the present invention may exhibit excellent visible light blocking effect when prepared by a filter because it has the best selective absorbance of visible light.

The tetraaza porphyrin compound may be represented by Formula 1 or Formula 2:

<Formula 1>                     

<Formula 2>

Wherein R ₁ , R ₂ , R ₃ and R ₄ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, an aryl group having 1 to 20 carbon atoms , A heteroaryl group having 1 to 20 carbon atoms and a halogen atom, wherein the alkyl group is an unsubstituted linear, branched form such as methyl, ethyl, propyl, isopropyl, butyl, t-butyl, cyclohexyl, dodecyl, etc. And cyclic alkyls, as well as 3-ethoxypropyl, 4- (N, N-diethylamino) butyl, 3-hydroxypentyl, 2-thiolhexyl, 1,2,3-tribromopropyl And substituents having heteroatoms such as the like.

In the tetraaza porphyrin derivative added as the photoselective agent, as the central metal M, Al, Si, Ca, Ti, V, Mn, Fe, Co, Ni, Cu, Zn, Ge, Mo, Ru, Rh, Pd, In, Sn, Pt, Pb, Mg, preferably nickel (Ni), magnesium (Mg), manganese (Mn), cobalt (Co) and copper (Cu).

The content of the tetraaza porphyrin derivative is 0.1 to 20% by weight based on the total content of the colored film, when the content is less than 0.1% by weight is insufficient to implement a color blocking effect, when the content exceeds 20% by weight It is not preferable because it is lowered and the luminance is lowered.

The polymer for forming the transparent substrate used in the present invention is not particularly limited, and it is preferable to have transparency, dimensional stability, hygroscopicity and excellent mechanical strength, and biaxially stretched polyethylene terephthalate, polytrimethylene terephthalate, polybutylene tere Polyester resins such as phthalate and polynaphthalene terephthalate, polycarbonate resins, polypropylene resins, polyethylene resins, acrylic resins, acetyl celluloses, methacryl resins, vinyl acetate resins, thiol-olefin resins and silicone resins, preferably It is selected from the group consisting of polyethylene terephthalate, acrylic resin, methacryl resin and polycarbonate resin.

The thickness of the film is preferably 50 to 300um. When the thickness of the film is less than 50 um, the durability of processing is inferior, and when the thickness is more than 300 um, it is not preferable because the surface conditions such as increased load and unevenness are not good.

The transmittance of the colored film according to the present invention is preferably a minimum transmittance of 30 to 70% in the wavelength range of 400 to 780nm in the visible light region. When the visible light is blocked in the wavelength band, excellent color can be exhibited. If the transmittance is less than 30%, the transmittance is too low to correct the orange color. If the transmittance exceeds 70%, the visible light transmittance is lowered and the luminance is reduced. It is not preferable because is lowered.

Examples of the tetraazaporphyrin-based compound include a compound represented by Formula 5 in Formula 3 below:

Wherein R ₁ to R ₄ are a methyl group, a butyl group or a phenyl group.

Wherein R ₁ to R ₄ are a methyl group, a butyl group or a phenyl group.

Wherein R ₁ to R ₄ are a methyl group, a butyl group or a phenyl group.

The present invention comprises the steps of preparing a film-forming composition by mixing a substrate-forming polymer, an organic solvent and a tetraaza porphyrin which is a photoselective agent (A); Homogenizing the mixture by applying heat (b); Extruding the mixture (c); It provides a method for producing a single-layer colored film comprising; and (d) cooling the resultant and biaxially stretching the resulting product.                     

The polymer for forming the substrate in step (A) is selected from the group consisting of polyethylene terephthalate, acrylic resin, methacryl resin, polycarbonate resin, vinyl acetate resin, thiol-olefin resin, silicone resin and polyester resin At least one is preferred.

The organic solvent used is at least one selected from alcohols, ethers, ketones, saturated hydrocarbons and halogenated hydrocarbons. Preferably butanol, isobutyl alcohol, isopentyl alcohol, isopropyl alcohol, ethyl ether, dioxane, tetrahydrobutane, tetrahydrofuran, n-butyl ether, propyl ether, isopropyl ether, acetone, methyl ethyl ketone, methyl To butyl ketone, thiisobutyl ketone, n-hexane, n-pentane, octane, cyclohexane, methyl cyclohexane, methyl cyclohexane, carbon tetrachloride, chloroform, methylene chloride, 1,1-dichloroethane, 1,2-dichloroethane At least one selected from the group consisting of.

 The amount of the organic solvent is 1 to 20% by weight based on the total content, and when less than 1% by weight, solids are easily precipitated, and are easy to hinder the reaction. Results in.

The content of the tetraaza porphyrin to be mixed is preferably 0.1 to 20% by weight based on the total content of the composition. When the content is less than 0.1 based on the polymer material for forming the transparent substrate, the light blocking effect is low, and when it exceeds 20% by weight, the transmittance is lowered, which is not preferable.

The mixture is homogenized by heating to a temperature of 280-320 ° C. in step (b). When the said temperature is less than 280 degreeC, the solubility of a polymer falls and when it exceeds 320 degreeC, the stability of a porphyrin pigment | dye falls and it is unpreferable.

Steps (a) and (b) may be performed separately or in a single process. The mixture is extruded with a T die or the like to produce a thin film. In the step (d), the film is quenched at a temperature of 5 to 50 ° C. for about 1 to 30 minutes. Biaxially stretching in the longitudinal direction and the width direction to produce a monolayer colored film.

1 is a partial perspective view showing the structure of a plasma display device employing a single layer color film including a photoselective agent of the present invention.

Referring to FIG. 1, the single-layered colored film 200 including the above-described photoselective agent is disposed at a predetermined distance in front of the front panel 70 of the plasma display device having the front panel 70 and the rear panel 60. have.

The front panel 70 includes a front substrate 51, a sustain electrode pair having a Y electrode and an X electrode formed on a rear surface of the front substrate, a front dielectric layer 55a covering the sustain electrode pairs, and a protective film covering the front dielectric layer. 56 is provided. Each of the Y electrode and the X electrode includes transparent electrodes 53a and 53b formed of ITO or the like and a bus electrode 54 made of metal having excellent conductivity.

The rear panel 60 is formed on the rear substrate 52, the address electrodes 53c formed on the front surface of the rear substrate so as to intersect the sustain electrode pair, the rear dielectric layer 56b covering the address electrodes, and the rear dielectric layer. And a partition wall 57 for partitioning the light emitting cells, and a phosphor layer 58 disposed in the light emitting cell.

Hereinafter, preferred examples and comparative examples of the present invention are described. The following examples are described for the purpose of showing the present invention more clearly, but the content of the present invention is not limited to the following examples.

<Example>

The light transmittance of the films prepared in the following Examples and Comparative Examples was measured by the following method.

Transmittance

The transmittance | permeability was measured about the light-diffusion film obtained by the following Example and the comparative example according to the method of ASTM-D1003.

Example 1

To 100% by weight of the polymer chip made of polyethylene terephthalate, 0.1 wt% of tetraaza porphyrin-based pigment was added, compression calcined, homogenized, and extruded. . When the transmittance at that time was measured, it was about 85%.

Example 2

A colored film was prepared in the same manner as in Example 1, except that the weight ratio of the added photoselective agent was 0.8 wt% based on 100 wt% of polyethylene terephthalate chip, and the transmittance was about 60%.

Comparative example

A colored film was prepared in the same manner as in Example 1, except that the weight ratio of the added photoselective agent was 20% by weight based on 100% by weight of polyethylene terephthalate chip, and the transmittance was about 5% or less.

TABLE 1

Example 1 Example 2 Comparative example Photoselector (wt%) 0.1 0.8 20 Polymer binder (% by weight) 100 100 100 Minimum transmittance (%) 85 60 5 Selective absorption effect △ ○ ×

The monolayer colored film prepared by using the tetraaza porphyrin compound of the present invention, when used in the display device can absorb the wavelength of 590nm vicinity to correct the color and further enhance the color clarity. In addition, the process can be shortened by mixing the compound with a polymer material for forming a substrate.

Claims (12)

A monolayer colored film comprising a tetraaza porphyrin compound and a polymer for forming a transparent substrate. The method of claim 1, wherein the tetraaza porphyrin compound is a single-layer coloring film, characterized in that represented by the formula (1) or formula (2): <Formula 1>

, <Formula 2>

Wherein R ₁ , R ₂ , R ₃ and R ₄ are each independently a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, an aryl group having 1 to 20 carbon atoms , A heteroaryl group having 1 to 20 carbon atoms and a halogen atom, M is selected from the group consisting of nickel (Ni), magnesium (Mg), manganese (Mn), cobalt (Co) and copper (Cu). The monolayer colored film of claim 2, wherein the alkyl group is a methyl group, an ethyl group, a propyl group, an isopropyl group, a butyl group, a t-butyl group, a cyclopentyl group, and a cyclohexyl group. According to claim 2, wherein the compound is a single layer colored film, characterized in that the compound represented by the formula (3, 4, or 5): <Formula 3>

Wherein R ₁ to R ₄ are a methyl group, a butyl group or a phenyl group, <Formula 4>

Wherein R ₁ to R ₄ are a methyl group, a butyl group or a phenyl group, <Formula 5>

Wherein R ₁ to R ₄ are a methyl group, a butyl group or a phenyl group. The monolayer colored film of claim 1, wherein the tetraaza porphyrin compound is present in an amount of 0.1 to 20% by weight based on the total content of the transparent base-forming polymer. The method of claim 1, wherein the polymer for forming the transparent substrate is selected from the group consisting of polyethylene terephthalate, acrylic resin, methacryl resin, vinyl acetate resin, thiol-olefin resin, silicone resin and polyester resin, and polycarbonate resin. Single layer colored film, characterized in that at least one selected. According to claim 1, wherein the thickness of the single layer colored film is a single layer colored film, characterized in that 50 to 300um. The single-layer colored film of claim 1, wherein the transmittance of the single-layer colored film is 30 to 70% of a minimum transmittance in a wavelength range of 400 to 780 nm in the visible light region. Preparing a film-forming composition by mixing a transparent substrate-forming polymer, an organic solvent, and a tetraaza porphyrin as a photoselector (A); Homogenizing the composition by applying heat (b); Extruding the mixture (c); And Cooling and biaxially stretching the resultant to produce a film (D); Method for producing a single layer colored film comprising a. The method of claim 9, wherein the content of tetraaza porphyrin in the step (A) is 0.1 to 20% by weight based on the total content of the composition. 10. The method of claim 9, wherein the heating temperature in the step (b) is 280 to 320 ℃. A plasma display panel comprising a filter employing the single layer colored film of any one of claims 1 to 8.

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