JPH0671784B2 - Metal curtain wall manufacturing method and strip used for it - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a metal curtain wall and a belt-shaped body used for the method. As the metal curtain wall targeted by the present invention, the aluminum curtain wall is mainly used in Japan at present, which will be described below. The main member is composed of an aluminum plate (JIS H 4000 aluminum alloy plate) and an aluminum profile (JIS H 4100 aluminum alloy extruded profile). The outer periphery of the aluminum plate material is joined with an aluminum shape member as an outer peripheral frame to form a unit.
In order to improve durability, corrosion resistance, and weather resistance, the surface of each aluminum member is anodized and coated with a composite coating on the anodized film, or surface treated by coating with an acrylic resin. ing.

[0002]

2. Description of the Related Art In the conventional manufacture of metal curtain walls, a silicone sealant with a cartridge is used for joining an aluminum plate material (plate member) and an aluminum shape member (long extruded member, usually a deformed elongated extruded member). Came. In this method, since the sealant is extruded from the cartridge to the joint surface of both members, bubbles and the like are likely to enter during the work, and a craftsman technique is required. Moreover, if the adhesive layer is thick,
Backup materials and masking tape are required. Further, since this sealant is mainly a room temperature curing type, there is a problem that a curing period of 1 to 2 weeks is required and a construction period is delayed.

In recent years, the shortage of manpower has spread to all industrial fields, and it has become more and more difficult to secure skilled workers. Therefore, it is becoming impossible to manufacture skilled metal curtain walls, which is simple and effective. The advent of various manufacturing methods has been desired.

[0004]

In view of the above-mentioned circumstances, the present invention is a method for producing a metal curtain wall which is simple, hassle-free, has excellent airtightness and waterproofness, and is used for the method. It was made to provide strips.

[0005]

DISCLOSURE OF THE INVENTION The present invention has solved the above-mentioned problems, and in manufacturing a metal curtain wall by joining a plate member and an extruding member,
Plasticity 15 preferably covered on both sides with a release film
A strip of unvulcanized silicone rubber of 0 to 500 may be attached to the joint surface of one member while peeling off the film if necessary, and the other member may be layered and pressure-bonded before heat treatment. The gist is the method for producing the characteristic metal curtain wall and the strip used for the method.

In order to solve the above problems, the present inventor has
As a result of earnest studies on a material replacing the silicone sealant, the present invention has been completed by finding that an unvulcanized silicone rubber band is suitable for this purpose.

The present invention will be described in detail below. The silicone rubber used for the strip of unvulcanized silicone rubber used in the present invention is as follows. What becomes a rubber-like elastic body by radical reaction cross-linking with an organic peroxide, and cures by so-called addition reaction cross-linking in which an organohydrogen polysiloxane and a curing catalyst for addition reaction curing represented by a platinum catalyst are added. It can be any of the ones, which is the average unit formula,

[0008]

[Chemical 1]

Wherein a = 1.90 to 2.05 and R is an alkyl group such as a methyl group, an ethyl group, a propyl group, a butyl group, an alkenyl group such as a vinyl group, an allyl group, a phenyl group and a tolyl group. A chloromethyl group in which part or all of hydrogen atoms bonded to carbon atoms of aryl groups such as these groups are replaced with halogen atoms, cyano groups, etc.,
The same or different unsubstituted or substituted monovalent hydrocarbon groups such as 3,3,3-trifluoropropyl group, cyanomethyl group, etc., preferably 80 mol% of which is a methyl group, and 0.1 to 0. An organopolysiloxane in which 5 mol% is a vinyl group, and preferably has a viscosity of 10 at 25 ° C.
It may be based on a material of 0 cs or more, and preferably 1000 cs or more. It is desirable that the terminal of the present organopolysiloxane is capped with a silanol group, a methyl group, or a vinyl group, and particularly, a terminal capped with a vinyl group.

This silicone rubber composition is generally prepared by blending the above-mentioned organopolysiloxane with a silica-based filler. As the filler, fumed silica,
Typical examples are precipitated silica, quartz powder, and diatomaceous earth, which have a particle size of 50 μm.
The following is preferable, and the addition amount may be in the range of 20 to 200 parts by weight with respect to 100 parts by weight of the organopolysiloxane. The composition may contain, as a silica dispersant, a silane containing an alkoxy group, a silanol group, or the like, a low-molecular-weight siloxane, or an inorganic pigment for coloring.

This silicone rubber composition can be heat-cured by radical crosslinking in the presence of an organic peroxide. Examples of the organic peroxide include benzoyl peroxide, 2,4-dichlorobenzoyl peroxide and orthochloro. Examples thereof include benzoyl peroxide, di-t-butyl peroxide, dicumyl peroxide and 2,5-bis (t-butyl peroxide) -2,5-dimethylhexane. Further, this silicone rubber composition may be of addition reaction type, in which case an organohydrogenpolysiloxane having at least two hydrogen atoms bonded to a silicon atom in the molecule and a platinum-based catalyst (chloroplatinic acid, chloride A platinum salt and a complex salt of alcohol, ether, aldehyde, olefin, vinyl siloxane and the like are generally contained in an amount of 1 to 1 with respect to the silicone rubber composition.
It may be added in the range of 100 ppm. Examples of the organohydrogenpolysiloxane include those of Chemical Formulas 1 to 7.

[0012]

[Chemical 2]

[0013]

[Chemical 3]

[0014]

[Chemical 4]

[0015]

[Chemical 5]

[0016]

[Chemical 6]

[0017]

[Chemical 7]

[0018]

[Chemical 8]

This addition amount is ≡SiH / ≡Si (CH═CH) with respect to the vinyl group amount in the above-mentioned organoporoxane.
₂ ) = 0.5 to 5.0 (molar ratio) may be provided. (In the formula, m, n, and p are positive integers.)

Further, a sponge rubber obtained by adding a foaming agent such as azobis isobutyronitrile to the silicone rubber composition can be used. The plasticity of the band of unvulcanized silicone rubber must be 150-500,
Outside this range, physical properties such as shapeability and compression set tend to deteriorate. The width and thickness of the strip are determined by the length, width and length of the extruding member to be joined to the plate member, and preformed. It is preferable that the front and back surfaces of the strip are covered with a release film made of polyethylene terephthalate, polycarbonate, polyvinyl chloride or the like to be protected from the external environment. A rubber is attached to a predetermined joint surface, and another member is further stacked on it to apply a load. The cross-sectional shape of the band-shaped body is appropriately selected and used depending on the shape of the portion to be attached such as L-shaped, B-shaped or I-shaped.

Specifically, first, on the joint surface of one member,
A band of unvulcanized silicone rubber is attached, and other members are superposed on the band, and 0.5 to ³ kg / cm ² , preferably 0.2 to
Crimping with a load of 1 kg / cm ² and then releasing it as necessary (so that the silicone rubber does not flow out during vulcanization), then vulcanizing it in a heating furnace or Heat vulcanize using a hot press. In this case, the temperature is 150 ° C. × 60 minutes for sufficient curing.

In this case, the adhesive surface of the member is preferably treated with a primer in advance. Examples of the primer include a liquid composition containing a film forming agent such as siloxane, a silane coupling agent, a solvent such as toluene and trichloroethylene, and a necessary amount of a catalyst, a pigment and other additives. The treatment can be omitted by preliminarily containing a primer in unvulcanized silicone.

The composition of the primer is as follows. Alkoxylane 50 to 200 parts Methyl vinyl polysiloxane 50 to 200 parts Methyl vinyl siloxane 50 to 100 parts Methylphenyl siloxane resin 20 to 50 parts Fumedricica 20 to 30 parts Dicumyl peroxide 2 to 5 parts Tin dilaurylate 10 to 20 Part is a liquid substance consisting of 1000 parts of organic agent solvent, and the following sample 1 is used as an example.

Sample 1 Methylvinylsiloxane 60 containing 100 parts of methylvinylpolysiloxane and 0.1 vinyl group bonded to silicon atom per silicon atom and having a viscosity of 500 cs
Parts, 30 mol% of methylsiloxane units, 30 mol% of dimethylsiloxane units, 35 mol% of phenylsiloxane units and 5 mol% of diphenylsiloxane units,
35 parts of methylphenylsiloxane resin having a silanol group content of 0.12 mol / 100 g, vinyltris (2-
Methoxyethoxy) silane 100 parts, specific surface area 200
25 parts of m ² / g fumed silica, 4 parts of dicumyl peroxide, 15 parts of tin dilaurate, 800 parts of toluene
Parts, 250 parts of trichlorethylene and 150 parts of isopropanol are added and uniformly mixed to obtain a primer composition. In addition to this, as another type,

Sample 2 consisting of 99.6 mol% of dimethylsiloxane units and 0.4 mol% of vinylmethylsiloxane units, having a viscosity of 5,0
A silanol group content of 0.05 mol, consisting of 43 mol% of dimethylsiloxane units, 50 mol% of methylsiloxane units, and 7 mol% of methylvinylsiloxane units, in 100 parts of methylvinylpolysiloxane of 0,000 cs (5 million cs). / 100 g of methyl vinyl polysiloxane resin 100 parts, vinyl tris (t-butylperoxy) silane 50 parts, specific surface area 200 m ² / g fumed silica 25 parts, tetrabutyl titanate 1 part, toluene 800 parts and n-hexane. What added 200 parts and mixed uniformly to make a primer composition, and as another type,

Sample 3 The organosilicon polymer containing a silazane bond, which is the main component of the primer composition, has the general formula:

[0027]

[Chemical 9]

The organic solvent solution may be used, and the concentration may be 0.1 to 10% by weight, and the concentration may be higher if necessary. The solvent is not particularly limited. Not something. R'is a hydrogen atom or an alkyl group such as a methyl group, an ethyl group, a propyl group or a butyl group, an aryl group such as a phenyl group or a tolyl group, a cycloalkyl group such as a cyclohexyl group, or a carbon atom of these groups. A chloromethyl group in which some or all of the bonded hydrogen atoms are replaced with halogen atoms, cyano groups, etc.,
The same or different unsubstituted or substituted monovalent hydrocarbon selected from 3,3,3-trifluoropropyl group, cyanomethyl group and the like, but it is essential that at least one of them is an unsaturated group. This X is an oxygen atom,
It is an atom or a group selected from an imide group, an alkylene group, and a phenylene group, but it is essential that 10% or more of the atom or group is an imide group, and a is an average of 1.8 or less, preferably 0.8 to 1 It is in the range of 0.5.

The size of the strip to be used is, for example, a sheet having a thickness of 8 mm and a width of 15 mm or a thickness of 10 m.
It is a thick sheet having a width of m and a width of 12 mm, but is not limited to this. According to the method described above, unlike the case of using a conventional silicone sealant, no skill is required for joining the members and the work is completed early without a curing period, so that the productivity can be improved.

The examples of the present invention will be described below for comparison with the conventional method.

EXAMPLE As shown in FIG. 1, in joining an aluminum profile extrusion member 1 and an aluminum plate member 3, each joining surface was treated with a primer (not shown) by the sample 1, Next, a strip 2 of unvulcanized silicone rubber having a plasticity of 300 and having a thickness of 8 mm and a width of 15 mm was pre-formed on the deformed elongated extrusion member 1, and the plate member 3 mm in thickness was used. 3 and then 0.
After pressure bonding at 5 kg / cm ² , it was heated at 150 ° C. for 60 minutes.
When the joint strength of this joint was tested by the test method of JIS A 5758 "Sealing material for construction", 38
kg / cm ² was obtained.

The band-shaped body 2 has the following composition. That is, the end of the molecular chain is (CH ₂ = CH) (CH
₃₎ blocked with ₂ SiO _0.5 (CH _{3) 2} SiO units 99.8 mol%, the _{(CH 3) (CH 2 =} CH) 100 parts organopolysiloxane gum composed of SiO unit 0.2 mol%, ( 40 parts of fumed silica having an average particle size of 15 μm, which was surface-treated with _0.5 unit of CH ₃ ) ₃ SiO, and the end of the molecular chain was blocked with a silanol group,

[0032]

[Chemical 10]

A silicone rubber compound obtained by kneading 10 parts of dimethylpolysiloxane represented by is added 0.75 parts of a vulcanizing agent orthomonochlorobenzoyl peroxide.

[0034]

COMPARATIVE EXAMPLE As shown in FIG. 2, a backup material 5 made of foamed ethylene with an adhesive is brought into close contact with the aluminum extruding member 1 and set on the aluminum plate member 3.
Next, attach a masking tape (not shown), apply the primer of sample 2 on the adhesive surface, dry and carefully fill the structural silicone sealant with care so that no air bubbles enter, then spatula finish and mask. The tape was removed and cured at room temperature for 2 weeks. When the bonding strength of this structural silicone sealant was tested in the same manner as in Example 1, it was found to be 7
Was about 12 kg / cm ² .

[0035]

EFFECTS OF THE INVENTION According to the present invention, since a simple work of simply sticking a band of unvulcanized silicone rubber of a predetermined size onto a joining member, no artisan skill is required,
There are no air bubbles in the material. It is sufficiently cured at 150 ° C for 60 minutes in a heating furnace or hot press, and no curing period is required. Crimping force when crimping is 0.2 to 1.0k
g / cm ² is sufficient.

[Brief description of drawings]

FIG. 1 is an explanatory view of a curtain wall manufacturing method of the present invention.

FIG. 2 is an explanatory view of a conventional curtain wall manufacturing method.

[Explanation of symbols]

1 Deformed long-length extruded member 4 Silicone sealant 2 Silicone band 5 Backup material 3 Plate member

Claims (3)

[Claims] 1. A plasticizer having a plasticity of 15 is used to manufacture a metal curtain wall by joining a plate member and an extruding member.
A method for producing a metal curtain wall, which comprises sticking an unvulcanized silicone rubber band of 0 to 500 to a joint surface of one member, superposing another member on the joint surface, press-bonding, and heat-treating. 2. A belt-shaped body of unvulcanized silicone rubber having a plasticity of 150 to 500, both sides of which are covered with a release film when a metal curtain wall is manufactured by joining a plate member and a deformed elongated extrusion member. Is attached to the joint surface of one member while peeling off the film, the other member is superposed on the film, pressure-bonded, and then heat-treated, which is a method for producing a metal curtain wall. 3. A strip used in the method for producing a metal curtain wall according to claim 2.