JPH0795122B2 - Light control heat ray absorber - Google Patents

Description

The present invention relates to a light control heat ray absorber having heat ray absorption characteristics and light transmission control characteristics used in buildings, automobiles, vehicles and the like.

[Prior Art] Conventionally, glass, methacrylic resin plate, polycarbonate resin plate, polyvinyl chloride resin plate, polyester resin plate, etc. have been used for applications such as windows and lighting taking advantage of their excellent transparency. It covers a wide range of fields including construction, automobiles, vehicles, and horticulture.

However, since the above-mentioned materials such as glass easily pass through the heat rays (infrared rays) of sunlight, they have a drawback that heat is easily accumulated inside to easily reach a high temperature. In order to solve this problem, in the case of glass, iron is used. , A metal such as nickel, cobalt, selenium, or a metal oxide is added, and in the case of a synthetic resin material, a heat ray absorbing function is added by adding carbon black, a metal complex or dye of a specific organic compound. Has been done.

[Problems to be solved by the invention]

In many applications of the heat absorbing plate, protection of privacy and control of sunlight transmission are often required in addition to the function of absorbing heat rays.

In response to such demands, blinds, curtains, or uprights have been used, but the interior of the room becomes darker because it obstructs lighting more than necessary, giving a feeling of pressure.
There is a problem that the outside is hard to see or the equipment cost is high.

[Means for solving problems]

The present invention is obtained by irradiating an ultraviolet ray from a specific direction and curing a resin raw material composition composed of a plurality of compounds having one or more polymerizable carbon-carbon double bonds in the molecule having different refractive indexes. A light control film or sheet, which selectively scatters only incident light within a predetermined angle range and transmits incident light of other angles, and a heat transmission layer having transparency and heat ray absorption characteristics. It is a light control heat ray absorber characterized by comprising an absorption layer.

Here, the compound having a polymerizable carbon-carbon double bond used in the present invention means a monomer or oligomer containing at least one polymerizable group such as an acryloyl group, a methacryloyl group, a vinyl group and an allyl group in the molecule. Is.
For example, polyfunctional acrylates such as polyester acrylate, polyol polyacrylate, modified polyol polyacrylate, isocyanuric acid skeleton polyacrylate, melamine acrylate, hydantoin skeleton polyacrylate, polybutadiene acrylate, epoxy acrylate, urethane acrylate, and these acrylates Corresponding methacrylates, also tetrahydrofurfuryl acrylate, ethyl carbitol acrylate, dicyclopentenyl oxyethyl acrylate, phenyl carbitol acrylate, nonylphenoxyethyl acrylate, 2-hydroxy-3-phenoxypropyl acrylate, ω-hydroxyhexanoyloxyethyl. Acrylate, acryloyloxyethyl succinate, Cryloyloxyethyl phthalate, tribromophenoxyethyl acrylate, isobornyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, 2,2,3,3-tetrafluoropropyl acrylate and methacrylates corresponding to these monofunctional acrylates, And N-vinylpyrrolidone, triallyl isocyanurate, diethylene glycol bisallyl carbonate, diarylidene pentaerythritol and the like.

The resin raw material composition used in the present invention is a mixture of two or more of these compounds, each of which has a difference in refractive index.

That is, the resin raw material composition of the present invention is characterized by the difference in the refractive index of the compounds used therein and the mutual solubility, and when the difference in the refractive index is large in a combination having poor compatibility, light is scattered. The degree increases and the angular range of scattered incident light also increases.

The present invention uses a light control film or sheet obtained by curing these resin raw material compositions by various methods, and it is preferable to use a photopolymerizable compound as each compound, or In this case, a method of coating the composition on a substrate or enclosing the composition in a cell and irradiating it with ultraviolet rays from a specific direction to cure the composition is preferable. This method can produce a light control film or sheet that selectively scatters incident light at a desired angle.

As the photopolymerization initiator used in this case, for example, benzophenone, benzyl, Michler's ketone, 2-chlorothioxanthone, 2,4-diethylthioxanthone, benzoin ethyl ether, diethoxyacetophenone,
Benzyl dimethyl ketal, 2-hydroxy-2-methyl propiophenone, 1-hydroxy cyclohexyl phenyl ketone and the like can be mentioned.

Ultraviolet rays are irradiated using a mercury lamp or a metal halide lamp, but when using a rod-shaped lamp, the cured product in the form of a film or sheet produced by adjusting the irradiation conditions is directed in the major axis and minor axis directions of the light source. It shows anisotropy to, and only when rotated about the long axis of the light source,
Scatters light at a specific angle.

The light control film or sheet thus obtained is used as the light transmission control layer of the light control heat ray absorber of the present invention. A transparent glass plate or a transparent plastic plate can be used as a substrate when forming a cell on the above-mentioned substrate or with two substrates and forming a light control film or sheet therein. When a transparent substrate is used, it can itself serve as a protective substrate for the light control heat ray absorber of the present invention.

The transparent plastic that can be used for this purpose is not particularly limited as long as it is transparent. For example, polymethylmethacrylate, polystyrene, acetylcellulose, poly-4-methylpentene-1, polycarbonate, polyarylate, polysulfone, polyethersulfone, polyetherimide, polyethylene terephthalate, etc. can be appropriately selected according to the purpose of use. .

As the heat ray absorbing layer having transparency and heat ray absorbing characteristics used in the present invention, as the heat ray absorbing material, transparent glass in which a simple metal such as iron, cobalt or nickel oxide or selenium is blended, or the heat ray absorbing material. As a metal salt of an organic acid such as cobalt naphthenate or copper naphthenate, dithiobenzoin, dithioacylloin, diamine, aminothiophenol, catechol, dithioyatecol, a metal complex such as mercaptophenol, carbon black, etc. A certain plastic can be used alone or in combination of two or more kinds.
The above-mentioned glass or plastic having transparency and heat ray absorbing ability is preferably used in the form of a sheet or film for the light control heat ray absorber of the present invention.

The various heat ray absorbing materials described above may be blended in the light transmission control layer. In this case, the light transmission control layer and the heat ray absorption layer form the same layer, but this case is also included in the scope of the present invention.

Alternatively, a heat ray absorbing material may be mixed with an adhesive, and the transparent plastic sheet and the light transmission controlling layer may be bonded by the adhesive to obtain the light controlling heat ray absorbing body of the present invention.

〔The invention's effect〕

According to the present invention, it is possible to provide a novel material having both a heat ray absorption function and a light transmission control function having an angle dependency in light transmission.

The light control heat ray absorber of the present invention is a building window material, a vehicle window material,
A wide range of applications can be expected for agricultural and horticultural materials as well as industrial materials, interior materials, and sundries.

〔Example〕

Hereinafter, the present invention will be specifically shown by the present invention, but the present invention is not limited thereto.

The optical properties (light transmittance, scattered light transmittance) and heat ray absorption (solar radiation transmittance) used in the examples were measured by ASTM D-1003 and JIS R-3208, respectively.

Example 1 Polypropylene glycol having an average molecular weight of 2000 and toluene
Of diisocyanate and 2-hydroxy acrylate
Polyether urethane acrylate obtained by reaction
(Refractive index 1.481) 100 parts of tribromophenoxy
100 parts of ethyl acrylate (refractive index 1.567) and benz
Resin raw material composition in which 6 parts of dimethyl ketal is added and mixed
With a 1 mm thick spacer between them and a 4 mm thick 60 cm square polymer
Chill methacrylate heat ray absorbing plate (Sumitomo Chemical Co., Ltd.)
Sumipex HA973) and 2mm thick transparent polymethylmethac
Relate plate (Sumitomo Chemical Co., Ltd.) Sumipex # 000
Injected during clear).

A high-pressure mercury lamp (80 W / cm, 2 KW emission diameter 25 cm, from a position 50 cm parallel to the plate from the vertical plane passing through the virtual line at the center of the plate from the side of the transparent polymethylmethacrylate plate,
Ushio Denki) for 1 minute. The light-controlled heat ray absorber thus obtained scatters light that is incident vertically (haze value 75
%), And a ray of light at an angle of 45 degrees measured from the vertical direction was transmitted (haze value 0.5%). Moreover, the solar radiation transmittance was 67%, which showed a good heat ray absorption capacity.

Comparative Example 1 A polymethylmethacrylate heat ray absorbing plate was used for heat ray absorbing ability.
Ordinary polymethylmethacrylate board that does not have (Sumitomo Chemical
Sumipex manufactured by Kogyo Co., Ltd. (SX-000) except that
Ultraviolet irradiation was performed in the same manner as in Example 1. like this
The resin plate obtained by
Light is scattered (cloudiness 78%) and is incident at an angle of 45 degrees.
The line was transparent (haze value 0.4%).

However, the solar radiation transmittance was as low as 86%, indicating a low heat ray absorption capacity.

Example 2 The resin raw material composition used in Example 1 was coated on a glass plate of 2.5 cm thick and 60 cm square to a thickness of about 300 μm, and at a distance of 50 cm on the glass plate, an angle of 45 ° from the vertical plane. Example 1
Similarly, the high pressure mercury lamp was irradiated for 1 minute.

Strip the cured film from the glass plate to remove heat ray absorption glass.
Supan (Nippon Sheet Glass Co., Ltd. Blue Pane) (Thickness 2.5 mm)
In between, insert a 500μ thick polyvinyl butyral film.
Then, press-bond it and obtain a heat ray absorption plate made of light transmission control.
It was

The pre-controlled heat ray absorbing plate transmitted a light ray incident at a right angle, but scattered a light ray incident at an angle of 45 °.

The solar radiation transmittance was 68%, which showed a good heat ray absorption capacity.

[Brief description of drawings]

1 to 3 show sectional views of the light control heat ray absorber of the present invention. 1 ... Light transmission control layer 2 ... Heat ray absorbing layer having transparency 3 ... Adhesive layer (transparent layer containing heat ray absorbing material) 4 ... Transparent sheet

Front Page Continuation (72) Inventor Tetsuro Ohno 2-10-1 Tsukahara, Takatsuki City, Osaka Prefecture Sumitomo Kagaku Kogyo Co., Ltd. (72) Inventor Motoaki Yoshida 4-chome, Doshomachi, Higashi-ku, Osaka Japan Ita Glass Co., Ltd. (72) Inventor Koichi Maeda 4-8 Doshomachi, Higashi-ku, Osaka City, Osaka Japan Nippon Glass Co., Ltd. (72) Inventor Naoya Imamura 4-chome, Doshomachi, Higashi-ku, Osaka Osaka In-house (56) References Japanese Patent Laid-Open No. 51-74425 (JP, A) Actually developed 57-105748 (JP, U)

Claims (1)

[Claims] 1. A resin raw material composition comprising a plurality of compounds having one or more polymerizable carbon-carbon double bonds in the molecule having different refractive indexes, and is cured by irradiating ultraviolet rays from a specific direction. It consists of the obtained light control film or sheet and has a light transmission control layer that selectively scatters only incident light within a predetermined angle range and transmits incident light of other angles, and has a transparency and heat ray absorption characteristics. A light control heat ray absorber comprising a heat ray absorbing layer.