JP3059278B2 - Joining members for building exterior materials - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining member for a building exterior material, and more particularly to a joining member used for joining a building exterior material such as a building panel, glass, and a sash.

[0002]

2. Description of the Related Art When a building panel, glass, or the like is mounted on a wall surface of a building, it is necessary to mount a frame member supporting the panel or glass so as not to be exposed to the outside. For this reason, as shown in FIGS. 4A and 4B, the mounting of the panel, the glass, and the like is performed by a silicone rubber gasket 22 fitted to an aluminum frame 21 having a flat surface provided on a column of a building. Alternatively, a back spacer 23 made of expanded polystyrene or expanded polyethylene adhered thereto is bonded and integrated with a panel or a glass plate 25 via a room-temperature-curable silicone rubber sealant 24.

[0003]

However, this method requires a period of two to three weeks until the silicone rubber sealant is completely cured, and when an external force such as wind or vibration acts on this during the curing period, There is a major problem in that the reliability of bonding on the bonding surface cannot be obtained.In addition, glass bonded to a sash frame such as an aluminum frame requires a sufficient curing period, so large buildings are required. There is also a problem that a particularly large working space is required when the above method is implemented.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a joint member for a building exterior material which solves such disadvantages and problems. The joint member is a heat generating sheet, particularly, an electric resistance wire in one direction of an insulating cloth. And a self-heating adhesive sheet formed by coating both surfaces of a heat generating sheet with uncured heat-curable silicone rubber.

That is, the inventor of the present invention has conducted various studies to develop a joining member capable of joining an exterior material for building easily and in a short time.
In particular, an unheated heat-curable silicone rubber coated on the surface of a heating sheet in which electric resistance wires are woven into an insulating cloth is attached to the upper surface of the silicone rubber block in the building exterior material, and then energized. And then heat it to cure the silicone rubber, and find that this silicone rubber block can be completely joined in a short time with this joining member. The present invention was completed by the research of the present invention. This is described in more detail below.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a joining member for building exterior materials, which is a heating sheet, for example, a semiconductive surface heating element obtained by adding carbon black to silicone rubber, or an electric insulating material in one direction. It is composed of a self-heating adhesive sheet in which both surfaces of a sheet in which a resistance wire is woven are coated with an uncured heat-curable silicone rubber, or a conventionally known heating sheet. If you paste it on a gasket and heat it with electricity,
This heating cures the silicone rubber, which adheres to the gasket, providing the advantage that the intended building exterior material can be easily and quickly bonded.

[0007] The joining member in the present invention comprises a self-heating adhesive sheet in which a heating sheet is coated with a heat-curable silicone rubber. The heat generating sheet 1 is exemplified by the heat generating sheet as described above. In particular, as shown in FIG. 1 a), a heat resistant and insulating cloth 2 such as glass cloth, polyamide cloth, polyamide imide cloth, or the like is used.
It is assumed that a heating wire 3 such as a nichrome wire, a stainless steel wire, or a carbon fiber is woven in one direction, and the insulating cloth has a thickness of about 0.1 to 0.6 mm and a density of 15 to 40 warp yarns /.
It is preferable that the thickness is in the range of 25 mm and 15 to 40 wefts / 25 mm from the viewpoint of reinforcement and ease of weaving of the heating wire.

The heating wire has a specific resistance of 70 to 80 μΩcm.
It is good to use a wire with a wire diameter of 0.1 to 0.2 mm, but this is made by bundling stainless fibers with a wire diameter of several μm and making it the same wire diameter, or a specific resistance of 1.5 × 2.0 × 10 ^-3 Ωcm It is preferable to bundle carbon fibers having a diameter of several μm and having the same diameter to have the same diameter because of ease of weaving. In addition, the weaving of the heating wire into the insulating cloth is performed by setting the interval to 1 to 10 mm and increasing the temperature of the heating element to 170 to 180 ° C.
It is preferable to adjust the applied voltage so that the density is 0.5 to 5 W / cm ² .

As shown in FIG. 1B, the self-heating adhesive sheet 4 used for the joining member of the present invention has both surfaces of the heating sheet 1 coated with uncured heat-curable silicone rubber 5 as shown in FIG. This is preferably covered with a release paper 6 having an embossed pattern. The heat-curable silicone rubber 5 used herein has an average unit formula of R _a SiO _4-a , where R is an alkyl group such as a methyl group, an ethyl group, a propyl group, a butyl group, a vinyl group, an allyl group. Such as an alkenyl group, a phenyl group, an aryl group such as a tolyl group, or a chloromethyl group or a trifluoropropyl group in which part or all of the hydrogen atoms bonded to carbon atoms of these groups have been substituted with a halogen atom, a cyano group, or the like. The same or different unsubstituted or substituted monovalent hydrocarbon groups selected from the group consisting of
2.02.05, but this is
It is preferably based on an organopolysiloxane having a viscosity at 25 ° C of 100 cs or more, preferably 1,000 cs or more, wherein 80 mol% or more is a methyl group and 0.1 to 0.5 mol% is a vinyl group. This is preferably self-adhesive. Self-adhesive silicone rubber
Silane coupling agent such as amino
There are silane, epoxy silane, vinyl silane, etc. (Table 1)
Or titanate coupling agent (Table 2), aluminum
System-based coupling agents (Table 3) or blends thereof
It is performed by adding a substance or the like.

[Table 1]

[Table 2]

[Table 3]

The silicone rubber generally contains a silica-based filler. Examples of the filler include fumed silica, wet silica, quartz powder, and diatomaceous earth. It is preferable that these particles have a particle size of 50 μm or less, and the amount of addition may be in the range of 20 to 200 parts by weight based on 100 parts by weight of the organopolysiloxane. This composition may contain a silane containing an alkoxy group, a silanol group or the like as a silica dispersant, and may further contain an inorganic pigment or the like for coloring.

The silicone rubber composition contains a cross-linking agent for curing the silicone rubber composition. The silicone rubber composition preferably has a one-minute half-life of 165 ° C. or less.
Benzoyl peroxide, monochlorobenzoyl peroxide, 1.1-di-t-butylperoxy-3.3.5
-Trimethylcyclohexane, 2.5-dimethyl- 2.5-
Examples include dibenzoylperoxyhexane, 1.6-bis-t-butylcarboxyhexane and the like. The silicone rubber composition contains the organopolysiloxane containing an unsaturated aliphatic group such as an alkenyl group.
A platinum catalyst comprising an organohydrogenpolysiloxane containing at least two hydrogen atoms bonded to silicon atoms in the molecule and chloroplatinic acid, or a complex salt of chloroplatinic acid with an alcohol, aldehyde, olefin, or vinylsiloxane; Or an addition reaction type.
In particular, if the addition reaction type silicone rubber is used,
Peroxidation unlike peroxide flow when affected
Benzoyl peroxide based residue
Is preferred since it does not have strong acid
It is a new thing.

Heat generation sheet 1 of this silicone rubber composition
The coating on the heat generating sheet 1 may be adhered to the heat generating sheet 1. For example, the heat generating sheet may be extruded using the heat generating sheet as a core material and coated with silicone rubber on both surfaces, or may be provided by topping with a calendar. This or the heating sheet may be impregnated with a solution of silicone rubber. The thickness of the silicone rubber coating layer is about 0.1 to 1 mm because the thickness of the self-heating adhesive sheet 4 obtained by coating the heating sheet 1 with the silicone rubber 5 is usually 0.3 to 3 mm. And it is sufficient.

In the self-heating adhesive sheet 4 thus produced, the heating wires 3 are woven at regular intervals only in the longitudinal direction of the tape-shaped cloth 2, and this is cut at an arbitrary position, and the end face thereof is cut. 2 can be generated by energizing the heat generating wire.
Overlapping an aluminum frame member 7 and the silicone rubber block 8 to self-heating adhesive sheet 4 as shown in a) of both ends of the low melting point metal in the self-heating adhesive sheet 4, for example, melting point
100 ° C. or less Pb, Sn, and immersed together in the molten bath 9 of the alloy such as Bi, either by bulk conduction, to the way across the proximity of the self-heating adhesive sheet 4 shown b) of FIG. 2 What is necessary is just to press the crimping type electrode terminal 10 which has an edge. In addition, other types of heat generating sheets may be heated according to a normal method by energization.

As shown in FIG. 3, the self-heating adhesive sheet is used to bond the building exterior material with the self-heating adhesive sheet 4 having power supply connected to the lead wires at both ends thereof on both sides of the silicone rubber block 8. Aluminum frame material 7
When the self-heating adhesive sheet 4 is energized and a pressure of 20 g / cm ² or more is applied thereto, the temperature of the self-heating adhesive sheet 4 rises by about 10 to 50 ° C./min. Since the temperature rises to 160 to 180 ° C. at a high speed, the silicone rubber 5 is hardened and adheres to the aluminum frame 7 and the panel and the glass plate 11, so that the bonding of the building exterior material can be easily and quickly performed. The advantage is given.

In this case, if the heating rate of the self-heating adhesive sheet 4 is too fast, the glass having poor heat conductivity may be damaged. The temperature should be 30 ° C / min, and the temperature should be raised to 150 ° C as the maximum temperature. However, for curing and bonding of this silicone rubber, aluminum frames, panels,
It is preferable to coat a silane coupling agent as an adhesion aid on the glass surface.Because this glass or aluminum frame material may cause poor adhesion if bubbles accumulate here during adhesion, In order to prevent sticking of the surface of the uncured silicone rubber used for the embossing, it is good to transfer the embossed pattern as if the release paper attached to it had an embossed pattern. do not have to.

[0016]

Next, examples of the present invention will be described. Example 1 30 warps / 25 mm, 20 wefts / 25 mm, thickness 0.3 mm, width 20 mm
A self-adhesive silicone rubber compound, KE702BU, on one side of a glass cloth containing a heating wire made by weaving stainless steel wires at a pitch of 2 mm into a glass cloth of Shin-Etsu Chemical Co., Ltd.
Product name] 100 parts by weight of 1.6-bis-t as crosslinking agent
A silicone rubber composition containing 0.8 parts by weight of butylcarboxyhexane and 0.3 parts by weight of monochlorobenzoyl peroxide was coated by calendar topping, and the silicone rubber composition previously separated was pressure-bonded and integrated on the opposite surface to a thickness of 1.5 parts. mm self-heating adhesive sheet was made.

Next, this sheet was cut to a length of 1.1 m, and this was attached to the upper surface of a silicone rubber block having a cross section of 20 mm × 20 mm and a length of 1 m, and an aluminum frame was placed thereon, and 50 g / cm ² Pressure, and apply a voltage of 50 V to the self-heating adhesive sheet to raise the temperature at a rate of 20 ° C. per minute.
After reaching 170 ° C, keep energizing for 10 minutes, then turn off the power,
When cooled naturally, the self-heating adhesive sheet, the silicone rubber gasket, and the aluminum frame material were completely bonded, and the three sets were subjected to a peel test of the aluminum frame material. All three sets were bonded. It was confirmed that the layer was broken at the rubber portion of the layer and was well bonded.

In the remaining three sets and the three silicone rubber gaskets on which aluminum is not attached, the silicone rubber gasket on which an aluminum frame material is attached is on the opposite side, and only the gasket is on one side. Then, the above self-heating adhesive sheet is placed, a glass plate is placed thereon, and a pressure of 50 g / cm ² is applied.
The temperature was raised at a rate of 15 ° C, and after reaching 150 ° C, the power was turned off, the power was turned off naturally, and the board was allowed to cool for 30 minutes, and then the gasket and glass were bonded. In each case, the bonded portion was destroyed in the same manner as described above, and good bonding was achieved.

Example 2 Warp 19 threads / 25 mm, weft 25 threads / 25 mm, thickness 0.24 mm, width 20 mm
After heating both surfaces of the glass cloth containing the heating wire, which is made by weaving carbon fiber wires into the glass cloth at a pitch of 2 mm, with silicone primer No. 18B (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.), the silicone rubber compound KE561U (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.) An extruder for extruding a silicone rubber composition obtained by adding 1.6 parts by weight of 1.6-bis-t-butylcarboxyhexane as a crosslinking agent and 0.3 parts by weight of monochlorobenzoyl peroxide to 100 parts by weight. To form a 1.8 mm thick self-heating adhesive sheet.

Then, this sheet was cut to a length of 1.1 m, which was affixed to the upper surface of a silicone rubber block having a cross section of 20 mm × 20 mm and a length of 1 m, and made of aluminum treated with the above silicone primer No. 18B. And apply a pressure of 50 g / cm ^{2 to} the self-heating adhesive sheet.
Apply a voltage of 80V and raise the temperature at a rate of 35 ° C per minute.
After the electric power was continued for 10 minutes after the temperature reached ° C, the power was turned off, the mixture was allowed to cool naturally, and the adhesion was completed. A peeling test was performed in the same manner as above, and it was confirmed that there was no problem with the adhesion.

The self-heating adhesive sheet was placed on the silicone rubber block on the opposite side to which the aluminum frame was attached, and an 8 mm glass plate treated with the above-mentioned silicone primer No. 18B was placed thereon. And
Apply a pressure of 50 g / cm ² and apply this self-heating adhesive sheet again.
Apply a voltage of 50V and raise the temperature at a rate of 15 ° C per minute.
After reaching 30 ° C. for 30 minutes, the power was turned off and the adhesive was terminated by allowing it to cool naturally, and the bonding was terminated. The same peeling test as described above confirmed that there was no problem with the adhesiveness.

[0022]

The present invention relates to a joining member for a building exterior material, and as described above, relates to a heating sheet, particularly to a heating sheet in which electric resistance wires are woven only in one direction of an insulating cloth. The self-heating adhesive sheet coated with uncured heat-vulcanized silicone rubber is used, but according to this, glass, panels and aluminum frame materials and silicone rubber gaskets can be easily formed in a factory,
In addition, it can be bonded and integrated in a short time, eliminating the need for outdoor work, and eliminating unstable bonding factors.
It can significantly improve the reliability of joining of building exterior materials, and also has the advantage that it requires less work, so that it does not require long-term curing as in the past and does not require a large space. Is given. In addition, according to this, the bonding of the glass, panel, aluminum frame material and the silicone rubber gasket can be factory-produced, and this period can be excluded from the construction period, so that the total construction period is shortened, etc. The effect is also given.

[Brief description of the drawings]

FIG. 1 is a structural view of a self-heating adhesive sheet used in the present invention, wherein a) is a longitudinal sectional view of a cloth and b) is a laminated longitudinal sectional view thereof.

FIGS. 2 (a) and 2 (b) are longitudinal sectional views showing a bonding method using a self-heating adhesive sheet used in the present invention.

FIG. 3 is a longitudinal sectional view showing a method for joining a building exterior material using a self-heating adhesive sheet according to the present invention.

FIG. 4 is a longitudinal sectional view of a conventional method for joining a building exterior material, in which a) uses a silicone rubber gasket and b).
Uses a silicone rubber back spacer.

[Description of Signs] 1 ... Heating sheet, 2 ... Insulating cloth, 3 ... Heating wire, 4 ... Self-heating adhesive sheet, 5 ... Uncured silicone rubber,
6 ··· Release paper, 7 ··· Melting bath,
8 ··· Crimp type electrode terminal, 9 ··· Panel and glass.

────────────────────────────────────────────────── ─── Continued on the front page (51) Int.Cl. ⁷ Identification code FI E04F 13/08 101 E04F 13/08 101K E06B 3/56 E06B 3/56 // B29L 31:10 (58) Fields surveyed (Int. .Cl. ⁷ , DB name) C09J 7/02 B29C 65/02 B29C 65/36 B29C 65/44 E04B 2/96 E04F 13/08 E06B 3/56

Claims (1)

(57) [Claims] 1. A joining member for a building exterior material, comprising a self-heating adhesive sheet in which both surfaces of a heating sheet are coated with uncured heat-curable silicone rubber.