JPH0813937A - Double glazing - Google Patents

Abstract

PURPOSE:To prevent dew condensation in a space by forming a moistureproof layer having small surface tension oh one of contact faces between sheet glasses, spacers, and seal materials or on the end faces of a double glazing. CONSTITUTION:Sheet glasses 1, 1' having a proper thickness are overlapped via spacers 2 on all end faces, a proper space 3 is formed between both sheet glasses 1, 1', and seal materials 4 are filled on the outsides of the spacers 2 to connect and fix the sheet glasses 1, 1'. The spacer 2 is a metallic rectangular tubular structure having a vent port 5 on the side facing the space 3, and a desiccant such as silica gel is held in the tube. A moisture-proof layer 6 made of a low-molecule compound having small surface tension (preferably a compound having the surface tension smaller than that of the spacer 2 and seal material 4) is formed on at least one of the contact faces between the plate glasses 1, 1', spacers 2, and seal materials 4 or the end faces of a double glazing. The moisture in the external air can be prevented from infiltrating into the space 3 through the boundary faces between both glasses 1, 1' and the seal materials 4 and the seal materials 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-layer glass sheet, and more particularly to a multi-layer glass sheet which does not allow moisture to enter the space of the multi-layer glass sheet for a long period of time and is excellent in dew condensation prevention.

[0002]

2. Description of the Related Art Conventionally, double-layer glass, such as double glass, which has further improved heat insulating properties and soundproofing properties, has been widely used. These multi-layer glass sheets have excellent heat insulation and soundproofing due to the air or other gas being sealed inside, but when used as a structural material for buildings, indoors and outdoors. In a use environment where the temperature difference between and may be significant, moisture condenses on the inner surface of the double-layered glass, hinders its translucency, or when the glass is a metal netted glass or a metal vapor-deposited glass. However, there is a basic problem that these metals are corroded and the strength and aesthetics of the double glazing are impaired.

As a method of solving the above problems,
A method of using a material having good adhesion to glass as a sealing material, as shown in FIG. 1, a hygroscopic agent or a desiccant is included in the spacer 2 and / or the sealing material 4, and the space 3 is always dried. A method of keeping the condition is adopted.

[0004]

However, in the case of the above-mentioned prior art, it is possible to prevent the dew condensation in the space of the multi-layer sheet glass in a short-term by keeping the space in the multi-layer sheet glass in a dry state, but in the long-term, the multi-layer The spacer in the plate glass, the seal material of the spacer or the seal material that seals between the glasses allows moisture to pass through, and due to the deterioration of the seal material over time, moisture penetrates into the space of the multilayer glass and absorbs moisture. The agent and the desiccant become saturated, and after several years, the temperature difference between the two sides of the multi-layer plate glass causes dew condensation on the glass surface in the multi-layer plate glass, causing various problems as described above.

Therefore, an object of the present invention is to prevent moisture from penetrating into the space of a multi-layer glass sheet for a long period of time and to prevent dew condensation, and to solve the problems such as opacity of the glass sheet due to dew condensation and rust of metal materials. It is to provide plate glass.

[0006]

The above object can be achieved by the present invention described below. That is, the present invention is a multi-layer plate glass in which a plurality of plate glasses are laminated by a sealing material at the end portions thereof with a spacer interposed therebetween, and at least one or a plurality of contact surfaces between the plate glass, the spacer and the sealing material are provided. A multi-layer glass sheet having a moisture-proof layer made of a low molecular weight compound having a small surface tension formed on the end face of the glass sheet.

[0007]

By forming a moisture-proof layer made of a low molecular weight compound having a small surface tension on at least one of the contact surfaces between the glass sheet, the spacer and the sealing material in the glass sheet or the end surface of the glass sheet, It is possible to provide a double-layered glass sheet that has excellent moisture condensation prevention properties because moisture does not enter the space of the glass sheet for a long period of time, and that solves the problems of opacity of the glass sheet and rust of the metal material due to condensation.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.
The double-layer glass sheet in the present invention may be any conventionally known double-layer glass sheet and is not particularly limited, but it is mainly double glass excellent in heat insulation and soundproofing. The structure of these multi-layer glass sheets may be a conventionally known one, for example, as shown in FIG.
As shown schematically in Fig. 1, plate glass of appropriate thickness 1, 1 '
Are stacked on each other with a spacer 2 therebetween to form a suitable space 3 (in which air or other gas is present) between the two glass plates 1 and 1 ', and a seal is provided on the outer side of the spacer 2. The main structure is a structure in which the material 4 is filled and the plate glasses 1 and 1'are fixed by adhesion.

In these structures, the plate glass 1,
1'is usually used for building materials, windows widely used in vehicles and the like, plate glass for doors and the like, tempered glass, glass with metal mesh, further heat ray absorbing glass, heat ray reflecting glass, low emissivity glass, etc. It is a plate glass or the like in which a metal or other inorganic substance is thinly deposited, and is not particularly limited.

Further, the spacer 2 for forming the space 3 between the two plate glasses 1 and 1'is made of metal, plastic having a certain degree of rigidity, or rod-like plate having a predetermined thickness such as rubber. It is a continuous body in the shape of a string or a string, and these spacers 2 may be the same as the spacers used in the conventional double glazing, for example, the conventional single seal type, dual seal type, flexible spacer type spacers, etc. Are all available,
There is no particular limitation.

The spacer 2 in the example shown in FIGS. 1 and 2 has a rectangular metal tubular structure having a ventilation hole 5 on the side facing the space 3, and silica gel or zeolite is contained inside the cylindrical body. , A desiccant such as anhydrous sodium sulfate, calcium chloride, calcium oxide, or a hygroscopic agent is retained. Further, the spacer 2 in the examples shown in FIGS. 3 and 4 is a solid rectangular body made of hard rubber or hard plastic or the like, and even if the desiccant or the hygroscopic agent as described above is kneaded therein. Good.

Although not shown between the plate glasses 1 and 1'and the spacer 2, a sealing material (adhesive) for adhering, fixing and sealing the both (in the present invention, this sealing material is also described below). It is often used together with the seal material).

The sealing material 4 itself which is filled on the outside of the spacer 2 and fixes the plate glass 1, 1'and the spacer 2 may be a known material, for example, a silicone sealant, a polyisobutylene sealant, a polysulfide sealant, polyurethane. A system-based sealant, a butyl rubber-based sealant, a polybutadiene-based sealant, a polybutadiene-polystyrene-based sealant, an acrylic resin-based sealant, or the like can be used, and is not particularly limited.

The feature of the present invention is to solve the above-mentioned problem of dew condensation in the conventional double glazing by at least one of the contact surfaces between the glazings 1 and 1 ', the spacer 2 and the sealing material 4 in the multi glazing, or This is the point solved by forming a moisture-proof layer made of a low molecular weight compound having a small surface tension on the end surface of the multilayer glass sheet.

Small molecule having low surface tension used in the present invention
As the compound, the spacer 2 or the sealing material 4 may be used.
It is preferable that the compound has a very low surface tension.
Preferred examples of such compounds include, for example, compounds of the general formula (R_A )_n Si (NCO)_4-n , (R_A )_n Si (OR
_B )_4-n , (R_A )_nSi (Cl)_4-n , (R_f )_n S
i (NCO)_4-n , (R_f )_n Si (OR_B ) _4-n ,
(R_f )_n Si (Cl)_4-n (R in the formula_A And R_B Is a hydrocarbon group, Rf is C_m F
_{2m + 1}・ C_k H_{2k + 1}A fluorinated alkyl group represented by
n, m and k are natural numbers, and n is an integer of 1 to 3)
Included are the organosilicon compounds represented.

The above compounds have a high reactivity with an isocyanate group, an alkoxy group and a halogen atom bonded to a silicon atom, and can react with a silanol group present on the glass surface, and have good adhesion to glass. Have sex. In the above organosilicon compound, R _A and R _B are hydrocarbon groups such as alkyl groups, aryl groups, alkylaryl groups and arylalkyl groups.

When the hydrogen atom of the organic group is a fluorohydrocarbon group at least partially substituted with a fluorine atom, the water repellency of the fluorine atom is added to the moisture resistance of the silicon atom. More excellent moisture resistance is obtained.

The low molecular weight compound having a small surface tension as described above may be liquid or solid in itself, and the liquid type may be used as it is in the present invention. Suitable organic solvent that does not react, for example,
It may be used by dissolving it in a general-purpose solvent such as acetone, methyl ethyl ketone, methyl isobutyl ketone, toluene and xylene. In the case of the solid low-molecular compound, it is preferable to use it as a solution of the organic solvent as described above. Further, if necessary, a resin binder such as an acrylic resin, a polyester resin, a polyamide resin, a polyurethane resin, an acetal resin or a vinyl resin can be dissolved and used in combination with the solution of the low molecular weight compound.

The example shown in FIG. 1 is an example in which the moisture-proof layer 6 made of a low molecular weight compound having a small surface tension as described above is formed on the end face of the above-mentioned double-layer glass sheet.
By forming the moisture-proof layer 6 continuously on the boundary surface (adhesive surface) between the sealing material 4 and the surface of the sealing material 4, the moisture in the outside air permeates through the boundary surface and the sealing material 4, and the plate glass It is possible to prevent entry into the space 3 between 1, 1 '.

The moisture-proof layer 6 can be formed by applying the low molecular weight compound having a small surface tension or an organic solvent solution thereof to the end face of the multilayer glass sheet, and if necessary, drying and solidifying the solution. The thickness is arbitrary, but for example, a sufficient effect is exhibited when the thickness is about 0.1 to 50 μm.

The example shown in FIG. 2 shows an example in which a moisture-proof layer 6 made of the low molecular weight compound having a small surface tension is formed between the plate glass 1 and 1'and the sealing material 4.

In FIG. 2, the moisture-proof layer 6 is shown as a layer separate from the sealing material 4, but the low molecular weight compound having a small surface tension or its solution may be impregnated in the sealing material 4. In some cases, the clear moisture-proof layer 6 may not be formed, but the object of the present invention is achieved in this case as well. The moisture-proof layer 6 may be formed on the surface of the sealing material 4, or may be formed in advance on a predetermined surface of the plate glass 1, 1 '.

The example shown in FIG. 3 is an example in which another spacer made of hard rubber or the like is used and the moisture-proof layer 6 is formed between the plate glass 1, 1 ′ and the sealing material 4 and the spacer 2. In the example shown in (1), a moistureproof layer 6 is further formed at the interface between the spacer 2 and the sealing material 4, and the same excellent moistureproof effect as described above can be obtained. It is also possible to obtain the effect that the adhesive surfaces of the spacer 2 and the sealing material 4 are further strengthened.

The double glazing shown in FIG. 1 was prepared as follows. Two pieces of transparent glass sheet 1 via the spacer 2
1 ′ was made into a multi-layer, and a moisture-proof layer 6 was formed on the end surface of the multi-layer plate glass in a state of being sealed with a sealing material 4 by using alkoxysilane having a long-chain alkyl group. The moisture-proof layer 6 was formed by applying a paint having the following composition as a solid content at a rate of 5 g / m ² on the end face of the multilayer glass sheet with a brush and drying at 40 ° C. for 24 hours.

Coating composition: alkoxysilane having long-chain alkyl group (manufactured by Shin-Etsu Chemical, trade name KBM3103C) 10 parts by weight Toluene / methyl ethyl ketone (1/1 by weight) 300 parts by weight

Regarding the double-layer glass sheet of the present invention obtained above, the effect of preventing dew condensation is compared with the same double-layer glass sheet except that the moisture-proof layer 6 is not formed, and the temperature is 60 ° C. and the humidity is 95%. When the dew-point temperature was measured after exposure to a humid environment for 300 days and the dew-point temperature was measured, the dew-point temperature was -60 ° C or lower and maintained the dew condensation preventing effect, while the moisture-proof layer was used. The dew-point temperature of the multilayer glass sheet on which No. 6 was not formed was −5 ° C., and it was easy for dew condensation to occur.

[0027]

According to the present invention as described above, at least one of the contact surfaces between the plate glass, the spacer and the sealing material in the multilayer glass sheet or the end surface of the multilayer glass sheet is made of a low molecular weight compound having a small surface tension. By forming a moisture-proof layer that does not allow moisture to enter the space of the double-layer glass sheet for a long period of time, it has excellent dew condensation prevention properties, and a double-layer glass sheet that solves the problems of opacity of plate glass due to dew condensation and rust of metal materials Provided.

Particularly, when the surface of the sealing material of the multilayer glass is impregnated with a low molecular weight compound having a small surface tension, the sealing material itself can be impregnated before assembling the multilayer glass, which is complicated. It is possible to easily obtain a double-layer glass sheet that does not require work and is excellent in preventing moisture from entering the space.

[Brief description of drawings]

FIG. 1 is a diagram schematically illustrating a double-layer glass sheet of the present invention.

FIG. 2 is a diagram schematically illustrating a double-layer glass sheet of the present invention.

FIG. 3 is a diagram schematically illustrating a double-layer glass sheet of the present invention.

FIG. 4 is a diagram schematically illustrating a double-layer glass sheet of the present invention.

[Explanation of symbols]

 1, 1 ': Sheet glass 2: Spacer 3: Space 4: Sealing material 5: Vent hole 6: Moisture-proof layer

Claims (4)

[Claims] 1. A multi-layer plate glass in which a plurality of plate glasses are laminated with a sealant at an end portion thereof with a spacer interposed therebetween, wherein at least one of the contact surfaces between the plate glass, the spacer and the seal member, or the multilayer. A multilayer glass sheet having a moisture-proof layer made of a low molecular weight compound having a small surface tension formed on the end face of the glass sheet. 2. The double-layer glass sheet according to claim 1, wherein the low molecular weight compound having a small surface tension is a compound having a surface tension smaller than that of the spacer or the sealing material. 3. The double-layer glass sheet according to claim 1, wherein the surface of the sealing material is impregnated with a low molecular weight compound having a small surface tension to form a moisture-proof layer. 4. The double-layer glass sheet according to claim 1, wherein the low molecular weight compound having a small surface tension is a reactive organic silicon compound.