KR101552920B1 - Infrared ray blocking composition and infrared ray blocking film comprising the same - Google Patents

Abstract

The present invention relates to an infrared ray shielding composition and an infrared ray shielding film comprising the same. More specifically, the present invention relates to an infrared ray shielding composition comprising a nano-sol and comprising a first nano-sol containing tungsten oxide, lanthanum oxide, and ATO and titanium oxide, cobalt or carbon black A second nano-sol containing at least one second nano-sol, a binder containing an acrylic resin, and a photoinitiator, wherein the light transmittance to the visible light region is improved and the transmittance to the infrared region is effectively blocked To provide a barrier composition.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an infrared ray blocking composition and an infrared ray blocking film containing the infrared ray blocking composition.

The present invention relates to an infrared ray blocking composition and an infrared ray blocking film comprising the same, and more particularly, to an infrared ray blocking composition comprising a nano-sol containing tungsten oxide, lanthanum oxide, and ATO dispersed therein to form a composition to maintain transmittance at a wavelength in a visible ray region , An infrared ray blocking composition having an excellent blocking effect on the wavelength of an infrared ray region is formed, the infrared ray blocking function can be effectively realized even with only one layer using the composition, and the hydrophilicity is imparted to the infrared ray blocking film.

 Recently, various types of functional films capable of coping with abnormal weather, heat waves and cold waves due to global warming effect are commercially available.

Among these functional films, there is a heat short film which has a great effect of 30% or more in reducing the cooling and heating cost by increasing the energy efficiency. The heat shield film is manufactured by coating a material that absorbs light in the ultraviolet ray region and the infrared ray region, transmitting only the visible ray region, and blocking the light in the ultraviolet ray region and the infrared ray region. However, since the visible light region is very short, the ultraviolet rays and the infrared rays are blocked at the same time, thereby causing a problem that the transmittance of the visible light ray is lowered.

In order to solve such a problem, an infrared ray blocking film is produced by using an inorganic oxide such as iron oxide or tungsten oxide alone, but there is a problem that the visible ray is colored due to absorption of a shorter wavelength side, and another Transition metal elements or rare earth elements also have unique coloring causes and are inadequate as infrared blocking materials due to their color.

In addition, the organic polymer compound is widely used as an infrared blocking agent. However, such a compound has problems such as solubility in organic solvent hybrid binder solvent, degradation due to ultraviolet light, deterioration of function and weatherability.

In addition, since the existing thermal short film has low hydrophilicity, it can cause secondary damage such as fogging due to temperature difference between indoor and outdoor, fungus and corrosion when it is applied to buildings, vehicles, marine glass, etc., The transparency is lowered to lower the visibility, and there is a disadvantage that frequent maintenance is required.

Therefore, it is necessary to study an effective substance which can selectively block the wavelength of the infrared region while maintaining the transmittance of the wavelength of the visible light region.

Accordingly, an object of the present invention is to solve such a conventional problem, and it is an object of the present invention to provide a nano-sol comprising tin oxide, lanthanum oxide and ATO or the like to form a nano-sol and blend with a binder and a photoinitiator to maximize the shielding ratio of the infrared region wavelength, An object of the present invention is to provide an infrared ray blocking composition in which the transmittance can be maintained at a wavelength of a light ray region.

It is another object of the present invention to provide an infrared ray blocking composition which can simultaneously realize a hydrophilic function including a nano-sol composed of titanium oxide that can effectively control the photocatalytic activity of the nano-sol.

It is an object of the present invention to provide an infrared ray blocking film comprising the above infrared ray shielding or infrared ray shielding composition and an infrared ray blocking composition capable of performing a hydrophilic function.

In addition, an object of the present invention is to provide a single-ply infrared ray blocking film having a single layer of a film composed of two or more plies with an excellent shielding effect of infrared rays with the above-mentioned infrared ray shielding composition.

An object of the present invention is to provide an infrared ray blocking film which can maximize the infrared ray absorbing effect by including a UV absorbent in the adhesive layer in bonding the base layer and the infrared ray blocking layer of the infrared ray blocking film.

In order to achieve the above object, an infrared ray blocking composition according to an embodiment of the present invention is an infrared ray blocking composition comprising a nano sol. The infrared ray blocking composition includes a first nano sol containing titanium oxide, lanthanum oxide and ATO, A nano-sol containing a second nano-sol containing at least one of cobalt and carbon black, a binder containing an acrylic resin, and a photoinitiator.

The weight ratio of the first nanosol and the second nanosol is preferably 1: 0.25 to 1: 0.75.

The nano-sol may further comprise a third nano-sol comprising silica-modified titanium oxide, wherein the nano-sol comprises 21 to 60 wt% of the first nano-sol, 5 to 45 wt% of the second nano- And 8 to 37% by weight of the third nano sol.

Wherein the dispersion particle size of the first nanosol is 50-180 nm, the dispersion particle size of the second nanosol is 30-100 nm, and the dispersion particle size of the third nanosol is 40-80 nm.

The infrared shielding composition may further comprise a UV absorber comprising at least one of a benzophenone-based compound, a triazine-based compound, a benzotriazole-based compound or a hindered amine-based compound.

Preferably, it may further comprise a polyether-modified polydimethylsiloxane.

According to another aspect of the present invention, there is provided an infrared ray shielding film comprising a substrate layer having an infrared ray blocking layer formed on one surface thereof, the infrared ray blocking layer including a first nanosol, Wherein the first nano-sol comprises tungsten oxide, lanthanum oxide and ATO, the second nano-sol comprises at least one of titanium oxide, cobalt and carbon black, the binder is an acrylic resin, .

It is preferable that the infrared ray blocking layer of the infrared ray blocking film further comprises a third nano-sol comprising silica surface-modified titanium oxide.

The infrared ray blocking film according to still another embodiment of the present invention is a one-ply type infrared ray blocking film having an infrared ray blocking layer, the infrared ray blocking layer, the base layer, the adhesive layer and the release film are sequentially laminated, Wherein the first nano-sol comprises tungsten oxide, lanthanum oxide and ATO, and the second nano-sol comprises at least one of titanium oxide, cobalt or carbon black, And the binder is characterized by containing an acrylic resin.

It is preferable that the infrared blocking layer of the one-ply type infrared ray blocking film further comprises a third nano-sol comprising silica surface-modified titanium oxide.

Wherein the dispersion particle size of the first nanosol is 50-180 nm, the dispersion particle size of the second nanosol is 30-100 nm, and the dispersion particle size of the third nanosol is 40-80 nm.

Preferably, the infrared blocking layer comprises a UV absorber comprising at least one of a benzophenone-based compound, a triazine-based compound, a benzotriazole-based compound or a hindered amine-based compound.

The thickness of the infrared ray blocking layer may be 0.5 to 10 mu m.

Wherein the adhesive layer comprises a UV absorbing agent and an acrylic resin adhesive comprising at least one of a benzophenone-based compound, a triazine-based compound, a benzotriazole-based compound or a hindered amine-based compound.

According to the infrared ray blocking composition of the present invention and the infrared ray blocking film comprising the same, one or more of the following effects can be obtained.

A first nano-sol comprising at least one of tungsten oxide, lanthanum oxide, ATO, titanium oxide, cobalt or carbon black is combined with an optimal kind of inorganic material to form an infrared ray blocking composition to form a visible ray region The shielding ratio of the infrared region wavelength can be effectively improved while maintaining the transmittance of the wavelength constant, thereby providing a film excellent in heat shielding effect.

By further including a nano-sol comprising titanium oxide surface-modified with silica, it is possible to further increase the shielding ratio of the infrared region wavelength and to exhibit hydrophilicity, thereby suppressing indoor condensation and improving the visibility.

Also, it is possible to provide a film in which the transmittance of visible light is greatly improved by controlling the dispersion particle size of the nano-sol.

Since the infrared ray blocking function is exhibited by an inorganic material, the film can be semi-permanently used because it has excellent durability as compared with an infrared ray blocking film made of a conventional organic material.

In addition, since the inorganic material can be formed into a single composition in the form of a nano-sol, a heat-shielding effect and a hydrophilic effect can be exhibited by one layer, and a thin film of one ply type can be realized. And the process cost is reduced, which is economically effective.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a sectional view of a structure of an infrared ray blocking film according to another embodiment of the present invention.
Fig. 2 (a) is a graph showing the results when the infrared ray blocking film is formed using the infrared ray blocking composition of Example 10, (b), Example 11, (c) The contact angle is a schematic diagram.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Spatially relative terms can be used to easily describe a correlation between one component and other components, and can be used in conjunction with the directions shown in the figures, It should be understood in terms. In the drawings, the thickness and the size of each component are exaggerated, omitted, or schematically shown for convenience and clarity of explanation. Also, the size and area of each component do not entirely reflect actual size or area.

Hereinafter, the infrared ray blocking composition of the present invention will be described.

The infrared ray blocking composition of the present invention comprises a nano-sol, and in the present invention, the nano-sol means a sol-like substance dispersed in the size of nano unit.

The nano-sol comprises a first nano-sol made of tungsten oxide (WO ₃ ), lanthanum oxide (La ₂ O ₃ ) and ATO (antimony tin oxide), titanium oxide (TiO ₂ ), cobalt (Co) The second nano-sol comprising at least one of the second nano-sol and the second nano-sol.

When the nano-sol is formed of the above-mentioned inorganic material, the material having transparency can be made excellent in visible light transmittance and durability and infrared ray blocking rate are high.

Tungsten oxide, which is a constituent material of the first nano-sol, exhibits a relatively high transmittance in the visible light region and a high infrared ray blocking rate. The tungsten oxide has an excellent blocking ratio against the near-infrared region wavelength in the infrared region, .

In order to compensate for this, the first nano sol is composed of lanthanum oxide and ATO, which have excellent blocking ability against the wavelength of the far infrared ray region.

Further, in order to maximize the infrared ray shielding effect, a second nano sol containing at least one of titanium oxide, cobalt and carbon black is used together with the first nano sol.

Particularly, the carbon black particles should be sufficiently small that they can not easily interfere with use in at least the aforementioned transparent fields so as not to interfere with the passage of the visible light region, so that the average particle size is preferably 100 nm or less, particularly 75 nm or less It is preferable to have a surface area of 50 nm or less, further preferably 40 nm or less, more preferably 20 m 2 / g or more, particularly 40 m 2 / g or more, but it is not necessarily limited to such average particle size and surface area. Suitable carbon blacks are effective at least with or without electrical conductivity, and are distinguished from conductive carbon black.

Surprisingly, when carbon black is used in combination with an infrared shielding composition, the combination of an infrared shielding inorganic additive and carbon black provides a stronger absorptivity in the infrared than that obtained by using one of the infrared shielding inorganic additives or carbon black separately .

This makes it possible to use the lower amount of infrared shielding inorganic additive and carbon black in combination when the infrared shielding inorganic additive alone is used in combination to achieve the same infrared shielding ratio.

It has also been found that when carbon black is used as part of an infrared shielding composition, it has a lower haze value than a composition exhibiting the same infrared absorptivity, which is composed of inorganic additives only, without carbon black.

Therefore, carbon black is suitable as an infrared shielding composition for use in a field where it is desired to combine low turbidity and high infrared shielding performance in an article, as it reduces the amount of inorganic additives required and at the same time keeps the haze value low.

The nano-sol containing various materials such as the first nano-sol and the second nano-sol effectively absorbs the wavelength of the infrared region by effectively controlling energy absorption and plasma vibration reflection due to free electron movement in the conductor such as the metal oxide .

The weight ratio of the first nanosol and the second nanosol is preferably 1: 0.25 to 1: 0.75, and most preferably 1: 0.5. When the weight ratio of the first nanosol and the second nanosol is less than 1: 0.25, the shielding ratio of the infrared region is lowered. When the weight ratio of the first nanosol and the second nanosol is outside 1: 0.75, the hardness and strength decrease, .

The nano-sol may further include a third nano-sol comprising silica-surface-modified titanium oxide to impart a hydrophilic property simultaneously with the effect of blocking the wavelength of the infrared region.

When the silica coated on the surface of the titanium oxide particles is left in the air, a part of the surface of the silica particles changes into a hydroxy group and forms hydrophilic and hydrogen bonds on the surface of the particles to increase hydrophilicity.

The titanium oxide can be divided into an anatase form and a rutile form, and in this case, an anatase form having a photocatalytic activity is preferably used.

To give the silica the surface-modified titanium oxide are effective hydrophilic performance, preferably 4 to 15 4 or more per silica on the surface per unit surface of the modified titanium oxide suitable for a predetermined range, for example, the unit surface area (㎚ ²⁾ pieces, More preferably 5 to 10 hydroxyl groups.

The silica surface-modified titanium oxide may be prepared using a silica precursor comprising at least one selected from the group consisting of tetramethyl orthosilicate, tetraethyl orthosilicate, tetrapropyl orthosilicate, tetrabutyl orthosilicate or water glass And can be synthesized by sol-gel method or impregnation method. The synthesis method is not limited thereto.

When the nano-sol contains a first nano-sol composed of tungsten oxide, lanthanum oxide and ATO, a second nano-sol composed of at least one of titanium oxide, cobalt or carbon black, and a third nano-sol composed of silica surface-modified titanium oxide, The nano sol preferably comprises 21 to 60 wt% of the first nano sol, 5 to 45 wt% of the second nano sol, and 8 to 37 wt% of the third nano sol.

In the above range, it may have a wavelength shielding ratio of a high infrared ray region, a low contact angle, a high light transmittance and a low haze value, which is an optimum range value that the inventors of the present invention have found out for a long time.

The nano sol may further comprise a dispersant and a solvent.

The dispersant is used to form inorganic particles in the form of a sol, and an acrylic polymer dispersant may be used. In particular, BYK-180 (BYK-Chemie, Germany) may be used. The dispersing agent for dispersing the third nano-sol may be a copolymer having an affinity for titanium dioxide or a hydroxy-functional group-containing carboxylic acid ester having a pigment-affinitive group or a high molecular weight alkylol aminoamide, Low molecular weight unsaturated polycarboxylic acid polymers are effective. However, the dispersant is not limited thereto.

The solvent may be an organic solvent such as alcohols, ketones, esters, amides, ethers or hydrocarbons which are usually used, and the alcohols may include isopropanol, methanol, ethanol, propanol, butanol, benzyl alcohol, propylene glycol or ethylene Glycols such as methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone or methylcyclohexanone, and the esters may be selected from the group consisting of methyl acetic acid, ethyl acetic acid, propylacetic acid, butyl acetic acid, ethyl formate, propyl formate, butyl formate or ethyl lactate Wherein the amides are dimethylformamide, dicetyl acetamide or n-methyl pyrrolidone, and the ethers are propylene glycol monomethyl ether, dioxane, tetrahydrofuran, ethylene glycol dimethyl ether, propylene glycol or dimethyl ether These solvents may be used alone or in combination of two or more. Can be used.

The nano-sol contained in the infrared-ray shielding composition of the present invention can control the dispersion particle size to improve the transmittance of the wavelength in the visible light region, the dispersion particle size of the first nano-sol is 50 to 180 nm, The dispersion particle size is preferably 30 to 100 nm, and the dispersion particle size of the third nano sol is preferably 40 to 80 nm.

Since the infrared ray blocking composition of the present invention has an absorption at a short wavelength side by an energy gap of 400 nm or less and a reflection at a long wavelength side by free electron plasma vibration of 780 nm or more, the visible ray region having electromagnetic energy in the range of 3.2 to 1.6 eV Thereby minimizing absorption and scattering in the range.

The scattering depends on the Rayleigh scattering formula of the following formula (1), and the degree of scattering is a function of the refractive index difference and the particle diameter between the particles contained in the infrared blocking layer and the base material, and in particular, The degree of scattering decreases, and therefore, when the dispersion particle size of the first nanosol, the second nanosol and the third nanosol is controlled as in the above range, the visible ray region is maximized and economical.

[Chemical Formula 1]

(S: scattering, m = np / nb, np: refractive index of the particle, nb: refractive index of the base material)

The binder contained in the infrared shielding composition is preferably an acrylic resin having excellent mechanical strength and excellent transmittance in the visible light region.

The acrylic resin may be synthesized by copolymerization of monomers such as ethyl acrylate, methyl acrylate, or butyl acrylate. Specifically, the acrylic resin may contain a carboxyl group such as acrylic acid or methacrylic acid Methacrylic acid, hydroxymethyl metaacrylic acid and 2-hydroxy ethyl methacrylic acid are preferable, and silicone polyester acrylate, silicone urethane acrylate, silicone urethane Modified acrylate resins such as methacrylate, urethane acrylate and urethane methacrylate can be used.

The acrylic resin may further include a copolymerizable aliphatic ester resin, an aromatic olefin resin, a polyvinyl resin, an aliphatic polyolefin resin, a polycarbonate resin, or the like. At this time, it is preferable that the acrylic resin is contained in a total amount of 50% by weight in the entire acrylic resin.

The infrared blocking composition may comprise a photoinitiator.

The photoinitiator is selected from the group consisting of benzyl dimethyl ketal, hydroxyl cyclohexyl phenyl ketone, benzophenone, 2,4-diethylthioxanthone, 4 4-benzoyl-4'-methyldiphenyl sulfide, 2,4,6-trimethylbenzoyl-diphenyl-diphenyl phosphine ), Methyl- [4-methylthio phenyl] -2-morpholine propanone, hydroxyl dimethyl acetophenone, 4-phenylbenzophenone 4-phenylbenzophenone, ethyl-4-dimethylaminobenzoate, and the like.

The infrared blocking composition may comprise a photo-curing agent.

The curable resin used for the photo-curing agent preferably has a light transmittance of 80% or more, more preferably 90%.

As the photo-curing agent, a curing resin which is commonly used in the technical field of the present invention can be used.

The photo-curing agent may be composed of a monomer containing at least one of an acryloyl group, a methallyl group, an acryloyloxy group, a methacryloyloxy group, an epoxy group, a vinyl ether group, an oxetane group, a melamine group or an isocyanate- Preferably, an aliphatic-alkl-epoxy-acrylate, an n-butylated melamine, an iso-butylatedmelamine or an isocyanate-based resin is effective.

The infrared screening composition may include an UV absorber to enhance the infrared absorption effect. Here, the UV absorber may include at least one of a benzophenone-based compound, a triazine-based compound, a benzotriazole-based compound or a hindered amine-based compound, preferably a benzophenone-based compound, It is most effective to use 2,2'-dihydroxy-4-methoxyphenone.

The infrared shielding composition may contain a smoothing agent and may be modified polydimethylsiloxanes, polyether-modified siloxanes, polydimethylsiloxanes, and polyacrylic acids, preferably modified polydimethylsiloxanes, and polyether-modified poly Dimethylsiloxane is most effective.

In the infrared ray shielding film of the present invention, an infrared ray blocking layer containing the above infrared ray shielding composition is formed on one surface of the base layer.

Wherein the first nano-sol comprises tungsten oxide, lanthanum oxide and ATO, and the second nano-sol comprises at least one of titanium oxide, titanium oxide, Cobalt or carbon black, and the binder may include an acrylic resin.

The infrared blocking layer may further include a third nano-sol comprising silica-surface-modified titanium oxide to impart a hydrophilic function.

Conventional infrared ray shielding film has a hydrophobic surface characteristic and exhibits a water contact angle similar to that of a glass. As a result of the temperature difference between the inside and the outside of the winter season, a condensation phenomenon occurs, However, when the infrared blocking layer is further formed by including the third nano sol, the hydrophilic property is exhibited, thereby suppressing the dew condensation phenomenon and improving the visibility.

A preferred embodiment of the infrared ray blocking film is a film structure in which the infrared ray blocking layer 10, the base layer 20, the adhesive layer 30 and the release film 40 are sequentially laminated as shown in Fig.

Wherein the infrared blocking layer (10) comprises a first nano sol, a second nano sol, a binder and a photoinitiator, wherein the first nano sol is composed of tungsten oxide, lanthanum oxide and ATO, , Cobalt or carbon black, the binder may include an acrylic resin, and the infrared blocking layer 30 may further include a third nano-sol comprising silica-surface-modified titanium oxide.

It is preferable that the dispersion particle size of the first nano-sol is 50-180 nm, the dispersion particle size of the second nano-sol is 30-100 nm, the dispersion particle size of the third nano-sol is 40-80 nm, As described above.

The infrared barrier layer 10 may further comprise a UV absorber comprising at least one of a benzophenone-based compound, a triazine-based compound, a benzotriazole-based compound or a hindered amine-based compound.

By forming the infrared ray blocking layer 10 with a shielding of the infrared region and, in some cases, the hydrophilic function in one layer, it is possible to form the infrared ray blocking film in the form of a one-ply (PLY).

The substrate layer 20 may be formed of a transparent material such as a transparent film or a transparent material such as glass and may be formed of a material such as polymethylmethacrylate (PMMA), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), triacetylcellulose (TAC) (PC), polyimide (PI), polyethylene (PE), polypropylene (PP), polyethersulfone (PES), polyvinyl alcohol (PVA), polyvinyl chloride (PVC), cycloolefin copolymer , A norbornene-containing resin, a polyether sulfone, a cellophane, and an aromatic polyamide, or a glass substrate such as quartz glass or soda glass. In particular, it is more preferable to use a film substrate containing at least one resin selected from the group consisting of polymethyl methacrylate (PMMA) and polyethylene terephthalate (PET) resin.

The infrared ray blocking layer 10 may be applied to the base layer 30 by a method such as Libya coating, microgravure coating, or slot die coating, but is not limited thereto.

The infrared shielding layer 10 preferably has a thickness of 0.5 to 10 탆, and when the thickness is less than 0.5 탆, the infrared shielding ratio is significantly lowered. When the thickness exceeds 10 탆, the transmittance in the visible light region is lowered, It is difficult to apply it to Windows, and the haze value increases.

The adhesive layer 30 may include a UV absorber, an ultraviolet absorber, and an acrylic resin adhesive.

The UV absorber may comprise at least one of a benzophenone-based compound, a triazine-based compound, a benzotriazole-based compound or a hindered amine-based compound.

The ultraviolet absorber may be zinc oxide, titanium oxide, cerium oxide, zirconium oxide or the like, or two or more kinds thereof, which maintain transparency.

The titanium oxide is preferably a rutile type which is stable in the whole temperature range from room temperature to melting point, rather than anatase form.

The infrared ray shielding composition and the infrared ray shielding film comprising the same according to the present invention have been described in detail.

Hereinafter, effects of the infrared ray shielding composition and the infrared ray blocking film including the infrared ray blocking composition according to the present invention will be described with reference to specific examples and comparative examples.

Table 1 below shows infrared blocking compositions according to the present invention.

The first nano sol The second nano sol The third nano sol UV absorber bookbinder Photoinitiator Polyether-modified polydimethylsiloxane Infrared blocking layer thickness
(탆) Tungsten oxide Lanthanum oxide ATO Titanium oxide cobalt Carbon black Example 1 10 10 10 5 5 5 0 10 100 5 One 2.5 Example 2 20 10 10 5 5 5 0 10 100 5 One 2.5 Example 3 30 10 10 5 5 5 0 10 100 5 One 2.5 Example 4 10 10 20 5 5 5 0 10 100 5 One 2.5 Example 5 10 10 30 5 5 5 0 10 100 5 One 2.5 Example 6 10 10 30 0 0 15 0 10 100 5 One 2.5 Example 7 10 10 20 5 0 10 0 10 100 5 One 2.5 Example 8 10 10 20 0 5 10 0 10 100 5 One 2.5 Example 9 10 10 10 0 0 15 0 10 100 5 One 2.5 Example 10 10 10 10 5 5 10 0 10 100 5 One 2.5 Example 11 10 10 10 5 5 10 10 10 100 5 One 2.5 Example 12 10 10 10 5 5 10 15 10 100 5 One 2.5 Example 13 10 10 10 5 5 10 20 10 100 5 One 2.5 Example 14 10 10 10 5 5 10 30 10 100 5 0 2.5

(Unit: parts by weight, based on 100 parts by weight of binder resin)

Table 2 below lists infrared blocking compositions that are outside the scope of the present invention.

The first nano sol The second nano sol The third nano sol UV absorber bookbinder Photoinitiator Polyether-modified polydimethylsiloxane Infrared blocking layer thickness
(탆) Tungsten oxide Lanthanum oxide ATO Titanium oxide cobalt Carbon black Comparative Example 1 0 10 10 5 5 5 0 10 100 5 One 2.5 Comparative Example 2 10 0 10 5 5 5 0 10 100 5 One 2.5 Comparative Example 3 10 10 0 5 5 5 0 10 100 5 One 2.5 Comparative Example 4 10 10 10 0 5 5 0 10 100 5 One 2.5 Comparative Example 5 10 10 10 5 0 5 0 10 100 5 One 2.5 Comparative Example 6 10 10 10 5 5 0 0 10 100 5 One 2.5 Comparative Example 7 0 0 0 5 5 5 0 10 100 5 One 2.5 Comparative Example 8 10 10 10 0 0 0 0 10 100 5 One 2.5 Comparative Example 9 0 0 0 5 5 5 20 10 100 5 One 2.5 Comparative Example 10 10 10 10 0 0 0 20 10 100 5 One 2.5 Comparative Example 11 10 10 10 5 5 5 20 10 100 5 One 5.0 Comparative Example 12 10 10 10 5 5 5 20 10 100 5 One 10.0 Comparative Example 13 10 10 10 5 5 5 20 10 100 5 One 15.0 Comparative Example 14 10 10 10 5 5 5 20 10 100 5 One 18.0

(Unit: parts by weight, based on 100 parts by weight of binder resin)

An infrared ray blocking film was prepared using the infrared ray blocking compositions of Examples 1 to 14 and Comparative Examples 1 to 14, and the light transmittance, pencil hardness, adhesion and water contact angle were measured and are shown in Table 3 below.

The infrared ray blocking film was composed of a release film, an adhesive layer, a PET film, and an infrared ray blocking layer composed of the above infrared ray blocking composition.

The measurement method of each item is as follows.

Light transmittance

The whole wavelength region was measured using a UV-Visible Spectrophotometer and an FT-IR / FT-NIR Spectrometer.

Haze value

Was measured by a haze meter NHD2000 (manufactured by Nippon Denshoku Kogyo).

Pencil hardness

After drawn 5 times to 50mm at a rate of load, 5mm / sec of 750g / m ² by a Mitsubishi evaluation pencil (UNI) for using a pencil hardness tester (Shinto Scientific, Heidon), it was evaluated for pencil hardness as the number of the injured .

Water contact angle

The water contact angle is measured by JIS R1703-2 at an angle of water between the tangent line and the solid surface when the water is tangent to the curved surface of the water by attaching it to the infrared ray shielding film.

Transmittance (%) Haze value Pencil hardness Water contact angle
(°) 550 nm 1000nm 1500 nm 2500 nm Example 1 80.6 35.8 32.7 58.2 1.9 3.2H 78 Example 2 78.2 23.8 21.2 65.5 2.0 3.3H 79 Example 3 73.7 15.8 13.2 73.7 1.9 3.5H 79 Example 4 78.6 29.5 30.5 47.5 2.1 3.1H 77 Example 5 81.5 30.5 30.0 42.1 1.9 3.1H 80 Example 6 78.2 25.6 20.0 61.0 2.2 2.9H 76 Example 7 79.1 31.8 25.0 55.4 2.1 3.0H 79 Example 8 75.6 28.5 22.1 44.0 1.9 3.0H 78 Example 9 82.1 35.5 33.1 43.2 2.0 3.2H 77 Example 10 80.5 35.1 30.0 50.1 2.1 3.3H 79 Example 11 81.5 31.0 25.0 50.1 1.9 3.1H 55 Example 12 80.7 33.5 29.8 49.5 2.0 3.0H 32 Example 13 78.3 34.5 26.0 55.5 2.0 3.2H 27 Example 14 79.2 33.6 27.5 52.8 1.9 3.3H 26 Comparative Example 1 66.0 45.0 43.9 65.9 2.3 2.1H 80 Comparative Example 2 68.0 43.5 40.1 63.5 2.1 2.9H 81 Comparative Example 3 65.4 42.1 38.0 69.0 2.4 2.5H 79 Comparative Example 4 60.0 38.0 31.0 54.5 2.3 2.6H 77 Comparative Example 5 73.0 42.2 35.1 59.1 2.3 2.7H 78 Comparative Example 6 65.0 39.1 35.1 57.1 2.4 2.4H 79 Comparative Example 7 55.0 30.1 25.1 45.1 2.2 1.8H 80 Comparative Example 8 63.1 45.1 39.5 55.9 2.3 2.0H 81 Comparative Example 9 57.5 35.1 27.4 50.2 2.1 2.1H 35 Comparative Example 10 65.1 46.1 40.5 56.9 2.4 1.7H 33 Comparative Example 11 64.1 43.5 40.8 61.1 2.2 2.8H 32 Comparative Example 12 60.1 40.1 32.5 58.3 2.3 2.8H 33 Comparative Example 13 54.2 35.1 29.8 55.9 2.1 2.7H 34 Comparative Example 14 49.8 31.0 24.5 50.8 2.3 2.5H 32

In Table 3, it can be seen that the content of the components and components of the first nano-sol and the second nano-sol affects the light transmittance, and the hydrophilicity is greatly influenced by the presence and the content of the third nano-sol. When the first nano-sol, the second nano-sol and the third nano-sol are both included, the titanium oxide of the third nano-sol has a little infrared blocking effect compared to the case of containing only the first nano-sol and the second nano- Can be improved.

In view of Examples 5 and 6, it can be seen that carbon black among the second nano sol components is particularly effective in lowering the infrared transmittance.

In the case where the first nano-sol and the second nano-sol include tungsten oxide, lanthanum oxide, ATO, titanium oxide, cobalt and carbon black, the transmittance in the visible light region is high and the infrared shielding ratio is high. It is most effective for control. On the other hand, in Comparative Examples 1 to 8, the transmittance at 550 nm in the visible light region is only about 60%, and the transmittance in the infrared region is remarkably high at about 40% or more, so that the infrared ray blocking effect can not be expected.

Examples 11 to 14 exhibit significantly lower water contact angles than those of Examples 1 to 10, and the effect of the first nano sol and the second nano sol on the water contact angle is insignificant. By adding at least 20 parts by weight of the third nano-sol to 100 parts by weight of the binder, the water contact angle can be lowered to 30 占 폚 or less, that is, the composition is excellent in hydrophilicity.

In addition, the comparative example in which some components of the nano-sol are absent has a pencil hardness value of only 2H to 3H, which shows that the content of the inorganic material is reduced and the durability is remarkably lowered.

The scope of the present invention is not limited to the above-described embodiments, but may be embodied in various forms of embodiments within the scope of the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

10: Infrared blocking layer
20: substrate layer
30: Adhesive layer
40: release film

Claims (15)

In an infrared shielding composition comprising a nano sol,
A first nano sol containing at least one of tungsten oxide, lanthanum oxide and antimony tin oxide (ATO), titanium oxide or cobalt, carbon black and silica surface-modified titanium oxide A nano-sol comprising a third nano-sol;
A binder including an acrylic resin; And
A photoinitiator,
Wherein the weight ratio of the first nano sol and the second nano sol to the carbon black sum is 1: 0.25 to 1: 0.75. delete delete The method according to claim 1,
Wherein the nano-sol comprises 21 to 60 wt% of the first nano-sol, 5 to 45 wt% of the second nano-sol and the carbon black, and 8 to 37 wt% of the third nano-sol. The method according to claim 1,
Wherein the dispersion particle size of the first nanosol is 50 to 180 nm, the dispersion particle size of the second nanosol is 30 to 100 nm, and the dispersion particle size of the third nanosol is 40 to 80 nm. Composition. The method according to claim 1,
Based compound, a benzophenone-based compound, a triazine-based compound, a benzotriazole-based compound, or a sterically hindered amine-based compound. The method according to claim 1,
The infrared shielding composition according to claim 1, further comprising a polyether-modified polydimethylsiloxane. An infrared ray blocking film having an infrared ray blocking layer formed on one surface of a base layer,
Wherein the infrared blocking layer comprises a first nanosol, a second nanosol, a carbon black, a third nanosol, a binder and a photoinitiator,
Wherein the first nano-sol comprises tungsten oxide, lanthanum oxide and antimony tin oxide (ATO), the second nano-sol comprises at least one of titanium oxide or cobalt, and the third nano- Modified titanium oxide, wherein the binder comprises at least one of an acryl-based, silicone-based or urethane-based compound,
Wherein the weight ratio of the first nano sol and the second nano sol to the carbon black sum is 1: 0.25 to 1: 0.75. delete 1. A one-ply type infrared ray blocking film having an infrared ray blocking layer,
Wherein the infrared ray blocking layer, the base layer, the adhesive layer and the release film are sequentially laminated,
Wherein the infrared blocking layer comprises a first nanosol, a second nanosol, a carbon black, a third nanosol, a binder and a photoinitiator, wherein the first nanosol comprises tungsten oxide, lanthanum oxide and antimony tin oxide, ATO), wherein the second nano-sol comprises at least one of titanium oxide or cobalt, the third nano-sol comprises silica-surface-modified titanium oxide, the binder includes an acrylic resin,
Wherein the weight ratio of the first nano sol and the second nano sol to the carbon black sum is 1: 0.25 to 1: 0.75. delete 11. The method of claim 10,
Wherein the first nano-sol has a dispersed particle size of 50 to 180 nm, the second nano-sol has a dispersed particle size of 30 to 100 nm, and the third nano-sol has a dispersed particle size of 40 to 80 nm. Infrared blocking film. 11. The method of claim 10,
Wherein the infrared ray blocking layer further comprises a UV absorbing agent comprising at least one of a benzophenone compound, a triazine compound, a benzotriazole compound or a hindered amine compound. 11. The method of claim 10,
Wherein the thickness of the infrared ray blocking layer is 0.5 to 10 占 퐉. 11. The method of claim 10,
Wherein the adhesive layer comprises a UV absorber and an acrylic resin pressure-sensitive adhesive comprising at least one of a benzophenone-based compound, a triazine-based compound, a benzotriazole-based compound or a hindered amine-based compound.

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