JP2008247623A - Heat ray shielding glass - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide heat ray shielding glass which shields ultraviolet rays, near infrared rays and far infrared rays at a high efficiency, and which transmits visible rays at a high efficiency. <P>SOLUTION: The heat ray shielding glass is obtained by forming an infrared ray absorbing layer by applying a coating material containing an infrared ray absorbing agent as a main component on a glass substrate in a pattern shape. Alternatively, the heat ray shielding glass is obtained by bonding a glass substrate and a heat ray shielding film base material to each other. The heat ray shielding film base material is obtained by forming an infrared ray absorbing layer by applying a coating material containing an infrared ray absorbing agent as a main component on a film base material in a pattern shape. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heat ray blocking glass that blocks near infrared rays and far infrared rays with high efficiency and allows visible light to pass with high efficiency.

  Conventionally, heat ray blocking glass has been used in order to reduce the cooling load by blocking the solar energy flowing into the building interior through the window glass to suppress the temperature rise in the room. Conventional ones are generally formed by forming several hundreds of oxide thin films such as titanium oxide and tin oxide by a spray method, a CVD method, a dip method or the like. In recent years, the prevention of global warming, such as the effect of the Kyoto Protocol, has attracted attention, and a material that effectively captures visible light and blocks near-infrared rays has been demanded. In recent years, there has been a demand for heat-ray-shielding glass that is difficult to break from the viewpoint of crime prevention, such as anti-spraying measures against vacancies that accompany the deterioration of security, and the like. Furthermore, it has been developed in consideration of workability and construction cost when used as a window glass.

  In addition, as a characteristic of the heat ray blocking glass, transparency, that is, a material that transmits visible light with high efficiency and has high heat ray blocking property is desired. However, heat ray blocking that can achieve both transparency and heat ray blocking property is desired. No glass is fully satisfactory at present.

Therefore, in order to solve the above problems, for example, as the heat ray blocking glass, the refractive index of the oxide film of the heat ray blocking glass sequentially laminated at least two layers of the heat ray absorbing film and the oxide film on the glass substrate is controlled. Japanese Patent Application Laid-Open No. H10-228688 proposes a heat ray blocking glass. Moreover, in patent document 2, a laser beam is irradiated with a laser beam irradiation apparatus to the heat ray blocking glass which coat | covered the thin film which laminated | stacked Ag film and the metal oxide film on the plate glass surface, and a heat ray blocking film is made to melt. After that, there has been proposed a heat ray-shielding glass in which silver and metal oxide are aggregated, and the generated fine particles are colored by revealing visible light scattering.
Japanese Patent Laid-Open No. 03-187734 JP 2003-12345 A

  However, the heat ray blocking glasses proposed in Patent Documents 1 and 2 above form an oxide thin film on a glass substrate by a method such as vapor deposition, and the oxide thin film is resistant to scratches and chemicals. There is a problem with durability such as stability. Furthermore, it is technically difficult to control the refractive index of the oxide film on the entire glass surface uniformly and constantly. In addition, the colored heat-shielding glass has a problem in application to automobiles and home window glass that require a natural color, that is, neutral color, low reflectance, and 70% visible light transmittance.

  The present invention has been made in view of the above technical background, and an object of the present invention is to provide a heat ray-shielding glass that blocks near infrared rays and far infrared rays with high efficiency and allows visible light to pass with high efficiency. And

As a solution to achieve the above objective,
The invention according to claim 1 is a heat ray shielding glass characterized in that an infrared absorption layer is formed by applying a coating agent mainly comprising an infrared absorber on a glass substrate in a pattern.

  The invention according to claim 2 is a method in which a glass substrate and a heat ray blocking film base material in which an infrared absorption layer is formed by applying a coating agent mainly composed of an infrared absorbent on a film base material in a pattern shape are bonded together. It is a heat ray shielding glass characterized by comprising.

  The invention according to claim 3 is the heat ray according to claim 1 or 2, wherein the pattern shape is any one selected from a stripe shape, a lattice shape, a dot shape consisting of minute cells, and a donut shape. It is a barrier glass.

The invention according to claim 4
The total heat transmittance of the heat ray-shielding glass according to any one of claims 1 to 3 is 80% or more, and has a spectral transmittance of 10% or less at 800 to 1200 nm in the infrared region. It is a barrier glass.

  The invention according to claim 5 is a heat ray shielding glass characterized by using the heat ray shielding glass according to any one of claims 1 to 4 for automobiles and buildings.

  Since the heat ray blocking glass of the present invention forms an infrared absorption layer in a pattern, it can be designed to control sunlight shielding (absorption), reflectivity, and transparency at the incident angle of sunlight. Further, it is possible to provide a heat ray-shielding glass capable of blocking near infrared rays and far infrared rays with high efficiency and transmitting visible light with high efficiency.

  Since the patterned infrared ray absorbing layer in the heat ray shielding glass of the present invention is formed by applying a coating agent mainly composed of an infrared absorber, compared with the oxide thin film deposited layer or the like in the conventional heat ray shielding glass, High durability with excellent wear and chemical resistance. Therefore, it can be sufficiently used for applications with severe usage environments such as automobiles and buildings.

  Furthermore, since an infrared absorption layer can be formed by a coating method, a heat ray-shielding glass for applications requiring a large area can be provided at low cost.

  Hereinafter, one preferred embodiment of the heat ray shielding glass of the present invention will be described. FIGS. 1-5 is a longitudinal cross-sectional view which shows the one embodiment about the heat ray blocking glass of this invention.

  As shown in FIG. 1, in the heat ray blocking glass of the present invention, a coating agent mainly composed of an infrared absorber is applied on one side of a glass substrate to form, for example, an infrared absorption layer having a quadrangular prism stripe pattern. The surface of the infrared absorption layer is subjected to a hard coat treatment to provide a hard coat layer.

  Further, as shown in FIG. 2, the heat ray blocking glass of the present invention is formed by applying a coating agent mainly composed of an infrared absorber on one surface of a glass substrate to form, for example, a triangular prism stripe pattern-shaped infrared absorbing layer. The heat-shielding glass has a structure in which a hard coat treatment is performed on the surface of the infrared absorption layer to provide a hard coat layer.

  Further, as shown in FIG. 3, the heat ray-shielding glass of the present invention has an infrared absorber as a main component on the surface opposite to the hard coat layer of the transparent film substrate on which the hard coat treatment is performed and the hard coat layer is provided. For example, it is a heat ray shielding glass in which an infrared absorption layer having a triangular prism stripe pattern is formed by applying a coating agent to be bonded, and a glass substrate is bonded to the surface of the infrared absorption layer via an adhesive layer.

  Also, as shown in FIG. 4, a coating agent mainly composed of an infrared absorber is applied to a transparent film substrate to form, for example, a triangular prism stripe pattern-shaped infrared absorption layer, and the surface of the infrared absorption layer The separator of the heat ray blocking film base material on which the separator (release paper) is laminated via the adhesive layer is peeled off and bonded to the glass substrate to obtain the heat ray blocking glass of the present invention.

  A coating agent mainly composed of an infrared absorber is applied to the transparent film substrate, for example, a triangular prism stripe pattern-shaped infrared absorption layer is formed, and a separator is provided on the surface of the infrared absorption layer via an adhesive layer. The heat ray blocking film substrate on which (release paper) is laminated can be used alone as a heat ray blocking film depending on the application.

  Further, as shown in FIG. 5, a coating agent mainly composed of an infrared absorber is applied on one surface of a glass substrate to form, for example, an infrared absorption layer having a triangular prism stripe pattern, and an adhesive layer is interposed therebetween. Then, a glass substrate can be bonded to the surface of the infrared absorption layer to obtain the heat ray shielding glass of the present invention.

  In the heat ray shielding glass of the present invention shown in FIGS. 1 to 5, heat rays from sunlight are blocked (cut) by the patterned infrared absorption layer, and transparency is ensured in a region where the infrared absorption layer does not exist. The Therefore, a heat ray-shielding glass excellent in high transparency and heat ray shielding effect can be obtained.

  As the pattern shape of the infrared absorbing layer, as shown in FIG. 6, the stripe shape (a) such as the rectangular column and the triangular column exemplified above, the lattice shape (b), the dot shape (c), the donut shape (d ) Pattern shape.

  The above pattern may be arbitrary as long as the infrared absorbing material has high transparency. The amount of infrared absorption depends on the coating amount and the incident state of light, and it is preferable that the absorption surface be perpendicular to the incident direction of sunlight.

  Examples of infrared absorbers used in the present invention include metal oxide semiconductors. Specific examples of the compound include tin-doped indium oxide (ITO) and antimony-doped tin oxide. Tin-doped indium oxide is particularly preferable from the viewpoint of transparency in the visible region. Near-infrared absorbers have a near-infrared absorption effect, and specific compounds include polymethine dyes, aminium dyes, and iminium dyes. Ultraviolet absorbers have an ultraviolet absorption effect, and specific compounds include benzophenone-based, benzotriazole-based, coumarin-based absorbers, and the like.

  And the coating agent which consists of a composition which has an infrared absorber as a main component formed by mixing said infrared absorber with binder (binding resin), a solvent, etc. is prepared, printing method etc. on a glass substrate or a film base material etc. The infrared absorber layer can be formed by a known coating method. By using a thermosetting resin, an ultraviolet ray, or an electron beam curable resin as the binder resin, a thermosetting type, an ultraviolet ray, or an electron beam curable coating agent can be obtained.

  As the film substrate used in the present invention, films such as polyacrylate, polyester, polyurethane, polyvinyl alcohol, polycarbonate, polyethylene terephthalate, vinyl chloride, fluororesin, and rubber that are transparent to visible light can be used.

The hard coat layer of the present invention is formed, for example, by applying an ultraviolet curable hard coat agent. UV curable hard coating agents are mainly composed of polymers, oligomers and monomers with radically polymerizable double bonds or epoxy groups in the structure as film-forming components, as well as other photopolymerization initiators and sensitizers. Contains agents. In the present invention, a hard coat layer having excellent surface hardness, transparency, friction resistance, scratch resistance, etc. can be formed by using an acrylate-based ultraviolet curable hard coating agent as a film forming component. it can. Examples of the method for applying the hard coating agent include known arbitrary application methods such as gravure coating, reverse roll coating, and blade coating.

  For the pressure-sensitive adhesive layer of the present invention, generally known pressure-sensitive adhesives for optical applications can be used.

  The heat-shielding glass of the present invention obtained above forms an infrared absorption layer in a pattern, so it can be designed to control sunlight shielding (absorption), reflectivity, and transparency at the incident angle of sunlight. It is possible to provide a heat ray-shielding glass that blocks ultraviolet rays, near-infrared rays, and far-infrared rays with high efficiency and transmits visible light with high efficiency. A heat ray-shielding glass having a total light transmittance of 80% or more and a spectral transmittance of 10% or less at 800 to 1200 nm in the infrared region can be easily designed. And by sticking this heat ray-shielding glass on the lath of buildings and automobile windows, it can absorb and block ultraviolet rays harmful to the skin and near-infrared rays that cause substances to generate heat, preventing sunburn. And energy saving effects such as reducing cooling costs. However, in the winter, the heat rays of sunlight are cut off, but since the internal heating is difficult to be released, it has a heat retention effect to some extent.

It is a longitudinal cross-sectional view which shows the one Example about the heat ray blocking glass of this invention. It is a longitudinal cross-sectional view which shows the one Example about the heat ray blocking glass of this invention. It is a longitudinal cross-sectional view which shows the one Example about the heat ray blocking glass of this invention. It is a longitudinal cross-sectional view which shows one Example of the heat ray blocking film base material used for the heat ray blocking glass of this invention. It is a longitudinal cross-sectional view which shows the one Example about the heat ray blocking glass of this invention. It is a top view which shows an example of the pattern shape of the infrared rays absorption layer of the heat ray blocking glass of this invention.

Claims (5)

  A heat ray-shielding glass, wherein an infrared absorption layer is formed by applying a coating agent mainly comprising an infrared absorber on a glass substrate in a pattern.   A heat ray comprising a glass substrate and a heat ray blocking film substrate on which an infrared ray absorbing layer is formed by applying a coating agent mainly comprising an infrared ray absorber on the film substrate to form a pattern. Barrier glass.   The heat ray shielding glass according to claim 1 or 2, wherein the pattern shape is any one selected from a stripe shape, a lattice shape, a dot shape composed of minute cells, and a donut shape.   The total heat transmittance of the heat ray-shielding glass according to any one of claims 1 to 3 is 80% or more, and has a spectral transmittance of 10% or less at 800 to 1200 nm in the infrared region. Barrier glass.   The heat ray blocking glass according to any one of claims 1 to 4, wherein the heat ray blocking glass is used for automobiles and buildings.

Images