JPS60250084A - Sealant for double-layer glass plates - Google Patents

Abstract

PURPOSE:To provide the titled sealant consisting of rubbery material and drier such as molecular sieve and silica gel, which insures airtightness of space formed between double-layer glass plates, prevents penetration of water vapor and moisture condensation within the space. CONSTITUTION:The sealant A is obtained by blending and dispersing 100pts.wt. rubbery material (e.g. butyl rubber), 30-250wt% drier consisting of molecular sieve and/or silica gel having air intaking voids and a particle size of 100 mesh or smaller, and, when necessary, filler and lubricant such as carbon black, CaCO3 and TiO2. First-step sealing is done with the sealant on the periphery of internal space C formed between two sheets 1 of double layer glass B by means of a spacer 2. Then the sealant A and an aluminum foil adhesive tape 4 are applied to the outside of the glass plates for second-step sealing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field 1] The present invention relates to a sealing material for double-glazed glass for preventing dew condensation from occurring inside the double-glazed glass.

[Background Art 1] One of the important characteristics of double-glazed glass is that it does not allow dew condensation to form inside. For this reason, a method is adopted in which a desiccant is sealed inside. For example, a method has been adopted in which a desiccant is housed in a hollow spacer and used as a spacing member between the glass plates of double-glazed glass, but thin double-glazed glass requires a thin spacer. This makes it difficult to put desiccant into the spacer. A method of mixing a desiccant into the spacer has also been adopted, but in this case, although it has a drying function, it does not have a sealing effect and cannot prevent water vapor from entering, resulting in condensation.

[Object of the invention 1 The present invention has been made in view of the above circumstances, and the [
One object of the present invention is to provide a sealing material for double-glazed glass that can ensure that the internal space formed between the glass plates of double-glazed glass is airtight to prevent water vapor from entering and condensation from occurring. There is a particular thing.

[Disclosure of the Invention] The A-layer glass sealing material A of the present invention is made by blending and dispersing a desiccant such as molecular sieve or silica gel into a rubber-based material.

The present invention will be explained in detail below.

Rubber materials used in the present invention include polyisobutylene, thiokol (polysulfide rubber), butyl rubber,
Silicone is commonly used as a sealing material, and may be used alone or in combination. As a desiccant, 3 to 4 people
Molecular sieves, silica gel, etc. that have human absorption pores are used alone or in combination. A desiccant is blended and dispersed in this rubber material to form a sealing material A for double glazing of the present invention.
get. The blending ratio of the rubber material and the desiccant is arbitrary, but in particular, the desiccant is 30 to 30 parts by weight per 100 parts by weight of the rubber material.
Preferably it is 250 parts by weight. If the amount of the desiccant is less than 30 parts by weight, the drying function will be poor, and if it exceeds 250 parts by weight, the sealing performance will be poor. The form of the desiccant is preferably as small as possible, about 100 mesh or less, since voids are likely to occur if the particle size is large. If desired, fillers such as carbon black, rhusium carbonate, and titanium oxide, and lubricants used in ordinary sealing materials may be added. When double-glazed glass B is sealed with the sealing material A for double-glazed glass formed in this way, moisture that has entered from the outside air is blocked and absorbed in the sealing material A for double-glazed glass, and the glass plate of double-glazed glass B is The air does not enter the internal space area C formed between the two spaces, and is released into the outside air when the humidity on the outside air side becomes low, thereby ensuring the airtightness of the internal space area C. The sealing material A for double-glazed glass of the present invention can be used as a secondary sealing material for double-glazed glass B with spacer 2 as the primary sealing material, as shown in FIG. Spacer 2 containing agent 3
may be used as a secondary sealing material, but it may be used as a secondary sealing material and other sealing materials,
For example, it is preferable to use an isobutylene sealant as the secondary sealant. 4 in the figure is an aluminum foil adhesive tape.

Next, examples of the present invention will be shown, but the present invention is not limited to the following examples. Incidentally, parts indicate weight t.

(Example 1) Additives such as 100 parts of molecular sieve (3 people), 10 parts of carbon black, and other additives such as a lubricant were mixed and dispersed in 100 parts of butyl rubber to obtain a sealing material.

When this material is heated, 1ffi as shown in Fig. 1,
Used as a secondary sealant in '7Las B. This double-glazed glass B was tested according to the test method for double-glazed glass of JIS R3209, and the presence or absence of dew condensation in the interior space area C was examined.

(Example 2) Additives such as 60 parts of molecular sieve (4A), 60 parts of silica sol, 20 parts of carbon black, and other additives such as a lubricant were mixed and dispersed to 0 parts of Thiokol S T i O to form a sealing material. Obtained. This product was heated and used as a secondary sealing material for double-glazed glass 13 as shown in FIG. This double-glazed glass B was JISR rated similarly to Example 1.
A test was conducted in accordance with the test method for double glazing of No. 3209, and the presence or absence of dew condensation in the interior space area C was investigated.

(Example 3) The same sealing material as in Example 2 was obtained, and this material was used in a heated state as a secondary sealing material for double-glazed glass B as shown in FIG. This double-glazed glass B was prepared using the JIS standard as in Example 1.
A test was conducted in accordance with the R3209 double glazing test method to determine whether or not dew condensation occurred in the interior space area C.

(Comparative Example) A sealing material was obtained by grinding 100 parts of Thiokol ST, blending 7 parts of carphone, 60 parts and other additives such as a lubricant, and mixing and dispersing it. This product was used in a heated state as a secondary sealing material for double-glazed glass B as shown in FIG. This double glazing B was JIS R32 as in Example 1.
A test was conducted according to the test method for double-glazed glass of No. 09, and the presence or absence of condensation and dew in the interior space area C was investigated.

As a result of the test, no dew condensation was observed in the internal space area C of the double-glazed glass B of Examples 1 to 3, but dew condensation was observed in the comparative example.

[Effect of the invention] In the present invention, molecular sieve,
Since a desiccant such as silica gel is blended and dispersed, when double-glazed glass is sealed, moisture that enters from the outside air is blocked in the seal U for scrap glass and absorbed between the glass plates of double-glazed glass. It does not penetrate into the internal space area that is formed and is released into the outside air when the humidity on the outside air side becomes low, ensuring reliable airtightness of the internal space area of the multilayer lath. It is something that can be done.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing one mode of use of the sealing material for scrap glass of the present invention, and Fig. 2 is a cross-sectional view showing another mode of use of the same. Material, B1. is the scrap glass, C is the internal space area, 1 is the glass plate, 2 is the spacer, 3 is the desiccant contained in the spacer, and 4 is the aluminum whistle adhesive tape. Agent Patent Attorney Ishi 1) Ai Figure 7 Figure 2

Claims (1)

[Claims] (1) A sealing material for preventing dew condensation inside the double-glazed glass, which is made of a rubber-based material mixed and dispersed with a desiccant such as molecular sieve or silica gel. sealing material.