JP2003268350A - Seal part structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seal part which hardly leaves stripe stains caused by elution of an uncured silicone resin component on the surface of a glass plate. <P>SOLUTION: The double-layered glass 1 comprises an outer glass 11 and an inner glass 12, and a spacer 13 intervening therebetween, and the spacer 13 accommodates a moisture absorbent 14. A thin film 11a of a photocatalyst such as titania (TiO<SB>2</SB>) is formed on the outer surface of the outer glass 11, while the seal part 4 comprises a caulking part 41 composed of a silicone resin and having the outer surface thereof covered with an elution-preventing layer 42. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a seal portion between plate-shaped members such as a glass plate forming an outer wall of a building or between a plate glass forming a window glass and a sash.

[0002]

2. Description of the Related Art SSG construction (structural seal construction) and DPG
A glass curtain wall represented by a construction method (point support construction method), that is, a joint sealing material between the glass plates that form the outer wall of the building, or the airtightness between the window frame (sash) and the glass plates is maintained to prevent rainwater from entering. Silicone resin is widely used as a caulking material for prevention from the viewpoints of workability and weather resistance.

On the other hand, recently, it has been known that a thin film of a photocatalyst such as titania (TiO ₂ ) exerts a hydrophilizing action in addition to a decomposing action of organic substances. Focusing on this photocatalytic action, a self-clean glass has been proposed in which a hydrophilic thin film containing a photocatalyst is formed on the outer surface (for example, Japanese Patent No. 2756474). In a window equipped with this self-cleaning glass, raindrops that hit the hydrophilic surface during rain will spread thinly instead of rounding, and when the amount of rainfall exceeds a certain amount, a water film will form on the front surface of the glass The dirt attached to the window surface is also washed away.

[0004]

When caulking is performed with a silicone resin for waterproofing, the uncured silicone resin component is dissolved in rainwater, and the dissolved silicone component is fixed on the glass surface as rainwater flows down. This becomes streaky dirt and becomes conspicuous.

On the other hand, the photocatalyst has a function of decomposing organic substances, but cannot remove the streaky stains. First, the molecular weight of the silicone component is too large, so it takes a long time to decompose. Even if all the organic part of the silicone component can be decomposed, the silica-based inorganic substance sticks to the surface and remains as stains. At the same time, the expression of photocatalytic activity is hindered. That is, the silicone component is decomposed by the photocatalytic action to generate a Si—O bond, and the chemical affinity between this bond and the inorganic compound contained in the photocatalyst itself is high. There is also a problem that the photocatalytic layer is fixed and the photocatalytic effect of the photocatalytic layer is impaired and the self-cleaning performance is impaired. (Research Group on Photo-Functional Materials, Photocatalyst, VOL.3,
"7th Symposium Recent Development of Photocatalytic Reaction", 5
4 to 55, "P-16 Photocatalytic antifouling effect against silicone sealant stain", published on November 9, 2000. )

[0006]

In order to solve the above-mentioned problems, the present invention is directed to a seal portion provided between plate-like members such as glass plates or between plate-like members or between plate-like members and other members. As a structure, an elution preventing layer of an uncured silicone resin component was provided on the outer surface of a caulking portion made of a silicone resin. For example, a photocatalyst layer is formed on the surface of the plate-shaped member, and as the elution prevention layer, a polysulfide sealing material, a polypropylene film, a polyvinyl chloride film, a metal film, or, for example, SR2405 manufactured by Toray Dow Corning Silicone Co., Ltd. Top coat No. manufactured by GE Toshiba Silicone Co., Ltd. A coating layer containing a silicone resin as a main component, which contains almost no uncured silicone component itself such as 3 and which hardly penetrates the silicone component, is considered.

As described above, by coating the surface of the silicone resin with the elution preventive layer, it becomes difficult for the silicone component to elute in rainwater, and it is possible to suppress the generation of streak-like stains and the photocatalyst layer is formed on the surface of the member. When formed, it is possible to prevent impairing the photocatalytic effect.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing an example in which the seal part structure according to the present invention is applied to an outer wall of a building. The outer wall supports double glazings 1 and 1 with a frame 2, and between the double glazings 1 and 1. The block 3 and the seal portion 4 are provided.

The multi-layer glass 1 has a spacer 13 interposed between an outer glass 11 and an inner glass 12, and a hygroscopic agent 14 is contained in the spacer 13. A thin film 11a of photocatalyst such as titania (TiO ₂ ) is formed on the outer surface of the outer glass 11.

On the other hand, the seal portion 4 covers the outer surface of the caulking portion 41 made of silicone resin with an elution preventing layer 42. As the dissolution preventing layer 42, a polysulfide-based sealing material, a polypropylene film, a polyvinyl chloride film, a metal film, or, for example, SR2405 manufactured by Toray Dow Corning Silicone Co., Ltd. or GE Toshiba Silicone Co., Ltd. top coat No. A coating layer containing a silicone resin as a main component, which contains almost no uncured silicone component itself such as 3 and which hardly penetrates the silicone component, can be used.

When the elution preventing layer 42 is coated with the polysulfide-based sealing material, the thickness of the polysulfide-based sealing material is 0.5 mm or less for the purpose of including measures against craters (traces of escape of entrapped air). 2 mm
It is preferable to form a thin layer coating. Further, if the thickness is made too thick, the durability and weather resistance of the seal portion are significantly deteriorated, so the thickness is preferably 10 mm or less. Also, the polypropylene film, polyvinyl chloride film, or metal film having a pressure-sensitive adhesive layer provided on the back side is used, and when the caulking portion 41 is colored, a film of a similar color is used. Is preferable, and the thickness is preferably 10 μm or more and 2 mm or less. If the thickness is less than 10 μm, there is a problem that sufficient permeation resistance to the uncured silicone resin component cannot be obtained. It is not preferable because there is a problem that it is difficult to secure adhesiveness when deformed due to expansion, contraction, movement such as displacement. Since the metal film needs to have sufficient weather resistance and permeation resistance to an uncured silicone resin component, a film using aluminum or stainless steel as a substrate is preferably used.

FIG. 2 is a cross-sectional view showing an example in which the seal structure according to the present invention is applied between a window frame (sash) and a glass plate. In this embodiment, the photocatalyst layer 21a is formed on the outer surface.
The glass plate 21 on which the
The peripheral edge portion is inserted into the aluminum sash 23 via the sealing member 4 between the glass plate 21 and the aluminum sash 23.
Is provided. Also in the seal portion 4, the outer surface of the caulking portion 41 is covered with the elution preventing layer 42 as in the above-described embodiment.

FIG. 3 is a perspective view of the apparatus used for the streak stain test. A glass plate 31 is attached obliquely (45 °) to the upper surface of the frame 15, and a glass plate 32 is attached vertically to the side surface.
The seal portion 4 was provided between the glass plates 31 and 32, and the structure of the seal portion 4 was varied as shown in the following (Table) to measure the length of the line-shaped stain. The seal part 4 is made by casting a two-liquid deoxime type silicone over a width of 20 mm, and after finishing with a spatula and curing and curing for one week outdoors, various elution preventive layers shown in the following table are provided, and the outdoors. The length of streak-like stain after exposure for 9 months was measured.

[0014]

[Table 1]

As is clear from this table, when the surface of the silicone resin is not covered with the elution preventive layer, the length of the streaky stain reaches 800 mm, but the elution preventive layer according to the present invention is used. It can be seen that the streak stain is significantly improved by providing it.

In the examples, the glass plate is shown as the plate member, but the present invention can be applied to the sealing part such as tiles and spandrel panels. Of course, a member having a photocatalyst layer formed on these members can be used. Can be preferably applied.

[0017]

As described above, according to the present invention,
When the silicone resin is used as the caulking material, the rainwater and the silicone resin do not come into direct contact with each other, so that the uncured silicone resin component can be prevented from being eluted into the rainwater, and therefore the surface of the glass plate or the like can be streaked. Does not easily get dirty. In particular, in a glass plate having a photocatalyst thin film formed on its surface, since the decomposition product of the silicone resin component is not fixed, the self-cleaning effect of the photocatalyst is effectively exhibited.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a seal portion structure according to the present invention.

FIG. 2 is a sectional view similar to FIG. 1 showing another embodiment.

FIG. 3 is a perspective view of the device used for the streak stain test.

[Explanation of Codes] 1 ... Multi-layer glass, 11 ... Outer glass, 11a ... Photocatalyst thin film, 12 ... Inner glass, 13 ... Spacer, 14 ... Hygroscopic agent, 21 ... Glass plate, 22 ... Setting block, 2
3 ... Aluminum sash, 4 ... Seal part, 41 ... Caulking part, 42 ... Elution prevention layer.

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[Procedure amendment]

[Submission date] March 19, 2002 (2002.3.1)
9)

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

[0014]

[Table 1]

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) // C03C 27/06 101 C03C 27/06 101Z (72) Inventor Shigeki Obana 4 Kitahama, Chuo-ku, Osaka-shi, Osaka C-No. 7-28 Nippon Sheet Glass Co., Ltd. F-term (reference) 2E016 AA01 AA05 BA07 CA01 CB01 DA06 DB07 DC05 DD01 DE03 4F100 AB01B AB33B AG00 AK07B AK15B AK52A AK57B AS00B BA02 BA25B DB06B02 CD25A05B02 CD25A05A02B02B05B05A05A02B04B05A05A02B02B05A05A02B02B05B05A05A02B02B01B1B05A05A02B04B05B05A05A02B04B05B05A05A02B02B01B01B05A05A02B02B05A05A02 4H017 AA04 AB14 AD05 AE05 4J038 DL031 PC03

Claims (8)

[Claims] 1. A structure of a seal portion provided between plate-like members such as a glass plate or between plate-like members or between a plate-like member and another member, the seal part being made of silicone resin. A seal part structure characterized in that an elution preventing layer of a silicone resin component is provided on the outer surface of the part. 2. The seal part structure according to claim 1, wherein a photocatalyst layer is formed on a surface of the plate-shaped member. 3. The seal part structure according to claim 1 or 2, wherein the elution preventing layer is a polysulfide-based sealing material. 4. The seal part structure according to claim 3, wherein the polysulfide sealing material as the elution preventing layer has a thickness of 0.5 mm or more and 10 mm or less. 5. The seal part structure according to claim 1 or 2, wherein the elution preventing layer is any one of a polypropylene film, a polyvinyl chloride film, and a metal film. 6. The seal part structure according to claim 5, wherein the thickness of the elution preventing layer is 10 μm or more and 2 mm or less. 7. The seal layer structure according to claim 1, wherein the elution-preventing layer itself contains almost no uncured silicone component, and the silicone resin is a main component of a silicone resin that is difficult to penetrate. The seal part structure is characterized by: 8. The seal part structure according to claim 7, wherein the elution preventing layer has a thickness of 10 μm or more and 500 μm or less.