KR19990026350A - Light transmission film - Google Patents

Abstract

The present invention relates to a light selective transmission film capable of blocking unnecessary ultraviolet rays and heat rays while selectively transmitting visible light when attached to glass windows such as automobiles, buildings, or various exhibitions, or when used alone. As for the transparent film, the light selective transmissive layer which consists of an ultraviolet absorber, an infrared absorber, a polymeric binder, or an acrylic adhesive is laminated | stacked on the plastic support film.

Description

Light transmission film

The present invention relates to a light selective transmissive film that can block unnecessary ultraviolet rays and heat rays while selectively transmitting visible light when attached to a glass window of an automobile, a building, or various exhibitions, or when used alone.

The sunlight reaching the earth consists of ultraviolet rays, visible rays, infrared rays, and the like having various wavelengths as shown in Table 1 below.

TABLE 1

Solar energy distribution map reaching the earth

Among them, ultraviolet rays (0.3 ~ 0.4㎛) cause skin aging or skin cancer on the human body, shorten the life of the product by causing coloration, fading and cracking of furniture, clothing, flooring, and exhibits, and also infrared rays (0.7㎛). The above is a major factor in reducing the cooling efficiency in summer. Therefore, by blocking unnecessary ultraviolet rays and heat rays from the sun, it protects the skin and extends the life of the product, improves the cooling efficiency in the summer, and also prevents the hot air from the heating device in the winter from being released to the outside through the window glass. Efficiency can also be increased.

Table 2 below shows the energy distribution of ultraviolet rays (0.3-0.4 μm), visible light (0.4-0.7 μm), and heat rays (0.7 μm or more) emitted from various heating heat sources. Heating wire of more than 0.7㎛ is the largest energy source of various heating heat sources, most of the heating wire is concentrated in 0.6 ~ 1.6㎛ and its shielding is very significant in energy protection.

TABLE 2

% Distribution of energy emitted from various heating sources

Conventionally, a colored glass is used to control the light rays passing through the glass, or a colored film or a metal thin film attached to the glass is mainly used. They are not able to sufficiently block ultraviolet rays and infrared rays, but also reduce the visible light transmittance of the glass. In particular, since the metal thin film is sputtered with metals such as titanium, silver, copper, and chromium, processing costs increase and durability of daylight decreases.

In order to solve the above problems, the present inventors have developed a light selective transmissive film which increases visible light transmittance while selectively blocking ultraviolet rays and infrared rays after continuous and systematic experiments and studies.

It is an object of the present invention to provide a light selective transmissive film.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the structure which apply | coated the light selective transmission layer to the plastic support film.

2 is a view showing a structure in which a light selective transmissive layer, an adhesive layer, and a release film are laminated on a plastic support film.

3 is a view showing a structure in which the adhesive light selective transmission layer 2 and the release film are laminated on the plastic support film.

* Explanation of symbols for main parts of the drawings

1. Plastic support film 2. Light selective transmission layer

3. Adhesive layer 4. Release film

The present invention relates to a light selective transmissive film, and more particularly, to a light selective transmissive film obtained by laminating a light selective transmissive layer formed of a polymer binder or an acrylic pressure sensitive adhesive to an ultraviolet absorbent or an infrared absorbent on a plastic support film.

The light selective transmissive film of the present invention has a UV transmittance of 0.36 μm or less, a visible light transmittance of 50% or more, an infrared transmittance of 1.0 μm or less, and a heat ray shielding coefficient of 0.9 or less.

The light selective transmission layer laminated | stacked on the light selective transparent film of this invention has adhesiveness.

In the light selective transmission film of the present invention, an adhesive layer and a release film may be sequentially stacked on the light selective transparent layer.

The ultraviolet absorber used in the light selective transmissive layer of the present invention is a benzotriazole type represented by the following Formula 1, and may block 98% or more of ultraviolet rays of 0.36 μm or less without impairing visible light transmittance.

[Wherein R ₁ is C _n H _{2n + 1} (n is an integer from 0 to 10), and X is H or Cl.]

Representative compounds represented by the formula (1) include 2- (2`-hydroxy-5-methylphenyl) -benzotriazole, 2- (2`-hydroxy-5`-t-octylphenyl) -benzotriazole, 2- (2`-hydroxy-3`, 5`,-(di-t-butyl) phenyl) -benzotriazole, 2- (2`-hydroxy-3`, 5`,-(di-t-amyl ) Phenyl) -benzotriazole, 2- (3`-t-butyl-2`-hydroxy-5`-methylphenyl) -benzotriazole, 2- (2`-hydroxy-3`, 5`,- Di-t-butyl) -chlorobenzotriazole and the like. Commercial products corresponding to these include Tinuvin P., Tinuvin 320, Tinuvin 328, Tinuvin 326, and Syasorb from Cyanamide. UV 5411 and the like.

In general, infrared absorbers include polymethine compounds, pyrilium or thiopyrilium compounds, cloconium compounds, azrenium compounds, phthalocyanine compounds, dithiol metal complex salt compounds, naphthoquinol compounds, anthraquinone compounds , Triphenylmethane compounds, amino compounds, mercaptonnaphthol metal complex salt compounds, and the like, and in the present invention, it is preferable to use an amino compound of the formula (2) or a compound of the formula (3).

[Wherein R ₂ is C _n H _{2n + 1} (an integer from n = 1 to 12), X is AsF ₆ , SbF ₆ , BF ₄ , ClO ₄ , NO ₃ , F, Cl, and m is 1 or 2 Is an integer.]

(Wherein M is nickel or cobalt and R ₃ is a quaternary ammonium group)

The amino compound of Formula 2 is an ammonium-based or di-monium-based compound that effectively blocks a heat ray of 0.7 μm or more, and has an infrared ray transmittance of 50% or more at 1.0 μm. In addition, these compounds are excellent in long-term durability because they are soluble in organic solvents and have excellent coating processability and are chemically structurally stable metal complexes.

Representative compounds represented by the formula (2) include N, N, N ', N'-tetrakis (p-diisopropylaminophenyl) -p-benzoquinone-bis (immonium nitrate), N, N, N', N'- tetrakis (p-dimethylaminophenyl) -p-phenylenediaminidium chlorate, N, N, N ', N'-tetrakis (p-dimethylaminophenyl) -p-phenylenediaminidium Chlorate, N, N, N ', N'-tetrakis (p-diethylaminophenyl) -p-phenylenediaminidiumfluoroborate, N, N, N', N'-tetrakis (p-di -n-butylaminophenyl) -p-phenylenediaminidium perchlorate, N, N, N ', N'-tetrakis (p-di-n-butylaminophenyl) -p-phenylenediaminidium fluoride , Etc.

Representative compounds represented by Formula 3 include bis (1-mercaptorate-2-naphthorate) nickel (II) tetramethylammonium and bis (1-mercaptorate-2-naphthorate) nickel (II) tetra Ethylammonium, bis (1-mercaptorate-2-naphthorate) nickel (II) tetra-n-butylammonium, bis (1-mercaptorate-2-naphthorate) nickel (II) trimethylphenylammonium, Bis (1-mercaptorate-2-naphthorate) nickel (II) trimethylphenylamine, bis (1-mercaptorate-2-naphthorate) nickel (II) triethanolamine, bis (1-mercaptorate -2-naphthorate) nickel (II) diethylamine, bis (1-mercaptorate-2-naphthorate) nickel (II) laurylamine, bis (1-mercaptorate-2-naphthorate Cobalt (II) tetramethylammonium, bis (1-mercaptorate-2-naphthorate) cobalt (II) tetraethylammonium, bis (1-mercaptorate-2-naphthorate) cobalt (II) tetra -n-butylammonium , Bis (1-mercaptorate-2-naphthorate) cobalt (II) tetramethylphenylammonium, bis (1-mercaptorate-2-naphthorate) cobalt (II) triethylamine, bis (1-mer Captorate-2-naphthorate) cobalt (II) triethanolamine, bis (1-mercaptorate-2-naphthorate) cobalt (II) diethylammonium, bis (1-mercaptorate-2-naphtho Late) cobalt (II) laurylamine, etc.

The polymer binder used in the present invention may be compatible with the ultraviolet absorber and the infrared absorber, and has good adhesion with the plastic support film, and does not absorb visible light after forming a coating film, so that any one can be used as long as it has transparency and excellent daylight fastness. Typically, there are polyester resins, acrylic resins, polyurethane resins, cellulose acetate resins or derivatives thereof, vinyl resins, epoxy resins, and the like, and polyester resins are particularly preferred. In addition, a curing agent may be used to improve various performances of the polymer binder, and as the curing agent of the present invention, an isocyanate-based, metal complexed system, melamine-based, polyaziridine-based, or the like may be used. The selection of the curing agent depends on the polymer binder used, and isocyanate curing agent is preferably used for the polyester resin.

The acrylic pressure-sensitive adhesive used in the pressure-sensitive adhesive layer and the light selective transmission layer of the present invention may be any one that is compatible with the ultraviolet light absorbent, has good conductive metal oxide and dispersion properties, does not absorb visible light, and is transparent and excellent in adhesive strength. In particular, a copolymer of n-butyl acrylate and ethylhexyl acrylate is preferable. In addition, a curing agent may be used as in the case of the polymer binder in order to improve the function of the adhesive property.

As the plastic support film of the present invention, any of those having excellent visible light transmittance may be used. Examples thereof include a polyester film, a polyolefin film, a cellulose acetate film, a polycarbonate film, and a polymethyl methacrylate film.

The composition ratio of the ultraviolet absorber, infrared absorber, polymer binder, or acrylic pressure-sensitive adhesive constituting the light selective transmission layer of the present invention described above is as follows. 100 weight part (relative to solid content) of a polymeric binder or an acrylic adhesive, 0.1-5 weight part of ultraviolet absorbers, and 0.01-5 weight part of infrared absorbers are preferable. If the added amount is 0.1 parts by weight of the ultraviolet absorber, 0.01 parts by weight or less of the infrared absorber, the blocking efficiency of ultraviolet rays or infrared rays is lowered. If both the ultraviolet absorber and the infrared absorber are 5 parts by weight or more, the visible light transmittance is lowered and the manufacturing cost is increased.

As a method for providing the light selective transmission layer of the present invention described above, the composition solution of the light selective transmission layer dissolved in an organic solvent on a support film is gravure coater, Meyer bar coater, comma coater, kiss roll coater, reverse roll coater, etc. It is completed by apply | coating with a drying and drying (FIG. 1). The product of the present invention as shown in FIG. 1 can be used alone without being combined with glass, for example, can be used for various functional packaging materials, special crop cultivation.

Also, as shown in FIG. 2, an adhesive layer is coated on the light selective transmissive layer, dried, laminated with a release film, and then removed from the release film, which can be used for glass, for example, automobiles, building windows, show windows, and department stores. Can be attached to window panes, hospitals, indoor domes, trains, etc. In addition, it is another feature of the present invention that the light selective transmissive layer and the adhesive layer are integrated as shown in FIG.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not particularly limited thereto.

Example 1

2- (2'-hydroxy-5-methylphenyl) benzotriazole was used as a UV absorber in a polyester film (Astroll manufactured by Kolon Corporation) having a thickness of 25 µm, and used as an infrared absorber, and a polyester resin ( SKA-100, manufactured by SKI Corporation, and isocyanate-based (Coronate L-45, manufactured by Nippon Synthetic Chemical Co., Ltd.), was applied with a # 20 Mayer coater at a composition ratio according to Table 3, and dried at 110 ° C for 30 seconds. Aged at 50 ° C. for 3 days. Its light transmittance, heat ray shielding coefficient, and measured values after 6 months of standing at 50 ° C are shown in Table 4.

Example 2

The pressure-sensitive adhesive composition was applied to the coated surface of the film prepared according to Example 1 at a composition ratio according to Table 3. [Acrylic pressure sensitive adhesive used n-butylacrylate-ethylhexyl acrylate copolymer. Coronate L-45) manufactured by Chem. Co., Ltd. was coated with a comma coater, dried at 110 ° C. for 1 minute, and then laminated to a polyester release film having a thickness of 25 μm treated with silicon, and aged at 50 ° C. for 3 days. Its light transmittance, heat ray shielding coefficient and measured values after 6 months standing at 50 ℃ are shown in Table 4.

Example 3

2- (2'-hydroxy-5-methylphenyl) benzotriazole was used as a ultraviolet absorber for a polyester film (Astroll manufactured by Kolon Corporation) having a thickness of 25 µm, and an acrylic pressure-sensitive adhesive was used as an n-butylacrylate- Ethyl hexyl acrylate copolymer was used, and as a curing agent, an isocyanate-based (Coronate L-45 manufactured by Nippon Synthetic Chemical Co., Ltd.) was applied with a comma coater at a ratio according to Table 3, and the silicone was treated after drying for 1 minute at 110 ° C. The polyester release film of 25 micrometers in thickness was laminated, and it aged at 50 degreeC for 3 days. Its light transmittance, heat ray shielding coefficient and the measured values after 6 months standing at 50 ° C are shown in Table 4.

Example 4

As in Example 2, but used as an infrared absorber. Its light transmittance and heat ray shielding coefficient are shown in Table 4.

Example 5

As in Example 2, 2- (2'-hydroxy-5'-t-octylphenyl) benzotriazole was used as the ultraviolet absorber. Its light transmittance and heat ray shielding coefficient are shown in Table 4.

Example 6

2- (2′-hydroxy-5-methylphenyl) benzotriazole was used as a ultraviolet absorber in a polyester film (Astroll manufactured by Kolon Corporation) having a thickness of 25 μm, and bis (1-mercaptorate-2-naph as an infrared absorber Torate) Nickel (2) Tetra-n-butylammonium was used, and isocyanate-based (Coronate L-45 manufactured by Nippon Synthetic Chemical Co., Ltd.) was used as a curing agent. After drying for 30 seconds at 110 ℃, it was aged for 3 days at 50 ℃. Its light transmittance, heat ray shielding coefficient and measured values after 6 months of standing at 50 ° C are shown in Table 4.

Example 7

A pressure-sensitive adhesive composition solution was prepared at the composition ratio according to Table 3 on the coated surface of the film prepared according to Example 1. [Acrylic adhesive uses n-butyl acrylate-ethylhexyl acrylate copolymer. Coronate L-45) manufactured by Synthetic Chemicals Co., Ltd. was coated with a comma coater, dried at 110 ° C. for 1 minute, and then laminated with a polyester release film having a thickness of 25 μm treated with silicon, and aged at 50 ° C. for 3 days. Its light transmittance, heat ray shielding coefficient and the measured values after 6 months standing at 50 ° C are shown in Table 4.

Example 8

2- (2′-hydroxy-5-methylphenyl) benzotriazole was used as a ultraviolet absorber in a polyester film (Astroll manufactured by Kolon Corporation) having a thickness of 25 μm, and bis (1-mercaptorate-2-naph as an infrared absorber Torate) Nickel (2) Tetra-n-butylammonium is used, The acrylic adhesive uses n-butylacrylate-ethylhexyl acrylate copolymer, As a hardening | curing agent, Isocyanate type (Coronate L-45 by Nippon Synthetic Chemical Co., Ltd.) is used. ), Coated with a comma coater at a composition ratio according to Table 3, dried at 110 ° C. for 1 minute, and then laminated with a polyester release film having a thickness of 25 μm treated with silicon, and aged at 50 ° C. for 3 days. Its light transmittance, heat ray shielding coefficient and the measured values after 6 months standing at 50 ° C are shown in Table 4.

Example 9

As in Example 2, bis (1-mercaptorate-2-naphthorate) nickel (2) tetraethylammonium was used as the infrared absorber. Its light transmittance and heat ray shielding coefficient are shown in Table 4.

Example 10

As in Example 2, 2- (2′-hydroxy-5′-t-octylphenyl) benzotriazole was used as the ultraviolet absorber. Its light transmittance and heat ray shielding coefficient are shown in Table 4.

Comparative Example 1

The light transmittance and heat ray shielding coefficient of the 3 mm thick untreated transparent glass plate were measured and shown in Table 4.

Comparative Example 2

The light transmittance and heat ray shielding coefficient of the polyester film used in Example 1 are shown in Table 4.

Comparative Example 3

The commercially available tintec colored film (trade name SUPER-STICK, gray color) was attached to a 3 mm untreated transparent plate glass with the release film removed, and the light transmittance, heat shielding coefficient and measured values after 6 months at 50 ° C are shown in Table 4. It was.

Comparative Example 4

The commercially available 3M aluminum thin film deposition film (trade name SCOTCHTINT, Grade RE35NEARL) was attached to a 3 mm untreated transparent plate glass with a release film attached thereto. .

Comparative Example 5

Commercially available titanium spattering film made by SOLAR-GARD Co., Ltd. was removed by attaching the release film to a 3 mm untreated transparent plate glass, and the light transmittance and heat ray shielding coefficient were measured and shown in Table 4.

Comparative Example 6

The light transmittance and heat ray shielding coefficient of commercially available automotive heat ray absorbing colored glass (thickness 3mm, gray color) manufactured by Korea Glass Company were measured and shown in Table 4.

TABLE 3

Coating composition

TABLE 4

Light transmittance and heat shield

a) The relative value at the time of making 3 mm transparent plate glass into 1.00 is shown.

As described in the above Examples and Comparative Examples, the light selective transmissive layer of the present invention has excellent visible light transmittance of 50% or more while blocking ultraviolet rays, and can be manufactured at low cost while effectively blocking hot rays and excellent in long-term durability. have.

Claims (5)

A light selective transmission film formed by laminating a light selective transmissive layer comprising a polymer binder or an acrylic pressure sensitive adhesive as an ultraviolet absorber or an infrared absorber on a plastic film support. The light selective transmissive film of claim 1, wherein the ultraviolet light absorbent is a compound represented by the following Chemical Formula 1. [Wherein R ₁ is C _n H _{2n + 1} (n is an integer from 0 to 10), and X is H or Cl.] The light selective transmissive film of claim 1, wherein the infrared absorber is a compound represented by the following Chemical Formula 2. [Wherein R ₂ is C _n H _{2n + 1} (an integer from n = 1 to 12), X is AsF ₆ , SbF ₆ , BF ₄ , ClO ₄ , NO ₃ , F, Cl, and m is 1 or 2 Is an integer.] (Wherein M is nickel or cobalt and R ₃ is a quaternary ammonium group) The light selective transmissive film of Claim 1 which consists of a ratio of 100 weight part of polymer binders (compared to solid content), 0.1-5 weight part of ultraviolet absorbers, and 0.01-5 weight part of infrared absorbers. The light selective transmissive film according to claim 1, wherein the UV transmittance of 0.36 μm is 2% or less, the visible light transmittance of 50% or more, the infrared transmittance of 1.0 μm or less, and the heat ray shielding coefficient is 0.6 or less.