JPH08291566A - Installing method of fastener to building frame - Google Patents

Abstract

PURPOSE: To improve workability, realize an installing condition having large holding power of a fastener to a building frame, and prevent dripping of a cold setting adhesive when the cold setting adhesive is injected into an inserting hole to insert the fastener or when the cold setting adhesive is stuck to and inserted into the fastener in an installing method for installing the fastener on a building frame of a building or the like. CONSTITUTION: A hole is bored in a building frame, and after a cold setting adhesive having viscosity not less than 500 cPs and a thixotropic factor not less than 1.1 is arranged in the hole or a fastener, the fastener is inserted into the hole. In order to improve holding power of the fastener to a building frame in a wetting condition and a drying condition, an acrylic type adhesive is desirable as the cold setting adhesive. Concrete is desirable as the building frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for attaching a stopper to a building body or the like. More specifically, the present invention relates to a method of realizing a mounting state in which the workability is good and the holding force of the stopper to the body is large. Furthermore, the cold-setting adhesive does not drip when the cold-setting adhesive is injected into the insertion hole for inserting the stopper, or when the cold-setting adhesive is attached to the stopper for insertion. Have an effect.

[0002]

2. Description of the Related Art Conventionally, when attaching a stopper to a building body, an insert, an anchor bolt,
A joining method has been adopted in which an agent for joining a buried wooden brick or the like is preliminarily attached at the time of placing concrete, but this method is complicated.

Then, as a method directly useful for simplifying the construction method, saving labor, maintaining aesthetics, reducing costs, etc., mechanical joining methods such as drilling, nailing and screwing have been considered. However, when the skeleton has a brittle material such as concrete, it is possible to realize sufficient holding force in order to show a tendency for the periphery of the piercing part to be broken when piercing the insertion hole for inserting the stopper. There wasn't.

In order to solve this drawback, there has been disclosed a method of strengthening the peripheral structure around the screw of the skeleton itself by a room temperature curing adhesive containing an epoxy resin as a main component (Japanese Patent Laid-Open No. 60-113811). . However, when the adhesive is injected into the insertion hole, the adhesive hangs down from the insertion hole, particularly the sideways insertion hole, and there is a drawback that the holding force for the stopper is reduced.

In this case, if the viscosity of the adhesive is increased, the adhesive does not drip, but it is difficult to transfer the adhesive to the injector, it is difficult to discharge the adhesive from the injector, and the workability deteriorates. There was a flaw.

[0006]

DISCLOSURE OF THE INVENTION As a result of intensive studies to improve these drawbacks, the present inventors have found that the intended purpose can be achieved by adjusting the physical properties of a room temperature curable adhesive. It was

[0007]

The present invention is one in which the viscosity and thixotropy of a room temperature curable adhesive are particularly adjusted. Specifically, a hole is formed in the body and the viscosity in the hole or the stopper is adjusted. It is a method of attaching a fastener, which comprises placing a room temperature curable adhesive having a thixotropy of 1.1 or more and 500 cps or more and then inserting the fastener into the hole.

The term "viscosity" as used in the present invention means a value measured at 25 ° C. and 10 rpm using a B type viscometer. The thixotropy coefficient in the present invention means a value obtained by dividing the viscosity at 25 ° C. and 1 rpm by the viscosity at 25 ° C. and 10 rpm.

The present invention will be described in more detail below. First, a hole is formed in the surface of the skeleton using a drill to insert a stopper having a required diameter. Next, the room temperature curable adhesive is placed in the hole or in the stopper, and there are the following methods.

The first method is a method of injecting and filling the insertion hole with a specific room temperature curable adhesive from the upper end opening thereof until a required amount, that is, substantially near the upper end of the insertion hole. The first method is to use an injection device such as a syringe.
It is possible to inject into a large number of insertion holes in a short time by continuous work, and workability can be improved.

The second method is a method in which a room temperature curable adhesive is attached to the stopper and the attached stopper is inserted into the insertion hole. When the cold-setting adhesive is attached to the stopper, the amount of the cold-curing adhesive is preferably such that when the stopper is inserted into the insertion hole, the cold-curing adhesive reaches almost the upper end of the insertion hole. In the second method, by using an applicator such as a brush or a spray, it is possible to adhere to many stoppers in a short time by continuous work, and workability can be improved.

The room temperature curable adhesive used here is prepared by adding an inorganic filler, a curing agent, a solvent and the like, if necessary, to a viscosity of 500 cps or more and a thixotropy of 1.1 or more. To be Viscosity is 1000 cps-80
More preferably, the thixotropy is 1.1 to 5.0.

When the room temperature curable adhesive has a viscosity of 500 cps or more and a thixotropy of 1.1 or more, the workability is good and the room temperature curable adhesive does not drip.

When the viscosity is less than 500 cps, it is easy to inject it into the insertion hole. However, when the room temperature curing adhesive is arranged in the insertion hole, the room temperature curing adhesive flows out from the insertion hole and the stopper is provided. The room-temperature-curable adhesive drips from the surface, which lowers the holding power, which is not preferable. Although the upper limit of the viscosity is not particularly specified, it is preferably 800,000 cps or less for facilitating the work.

When the thixotropy coefficient is less than 1.1, it is difficult to transfer the room temperature curing adhesive to the injector, it is difficult to discharge the room temperature curing adhesive from the injector, and the room temperature curing adhesive is applied to the brush. It is not preferable because the workability is deteriorated because it is hard to adhere and it is difficult to apply the room temperature curing adhesive to the stopper. The upper limit of the thixotropy coefficient is not particularly specified, but it is preferably 5.0 or less in order to facilitate the work.

Next, before the room temperature curable adhesive is cured,
Insert a stopper having a corresponding length and diameter into the insertion hole on the body surface. Examples of the type of fastener include nails, keys, wedges, clamps, nuts, screws, hinges, bolts, rivets, and the like, but it is preferable to use screws. In addition, embedded anchor hardware, stanchions, handrail hardware, partition studs, implanted reinforcing bars, etc. may be used.

After the work is completed as described above, the room temperature curing adhesive is left to stand at room temperature to cure, and the room temperature curing adhesive is sufficiently filled and cured between the stopper and the body. Due to the fact that the adhesive force is developed, the stopper can be made to have excellent pull-out strength. Examples of the skeleton include metal, wood, plastic, glass, asphalt, asbestos, mortar, concrete and the like.

Considering that the room-temperature-curing adhesive penetrates into the body, and the portion around the hole is reinforced by the room-temperature-curing adhesive penetrating into the body, the body is made of wood, asbestos, mortar, A skeleton made of a material such as concrete into which a room temperature curable adhesive easily penetrates is preferable, and concrete is more preferable. Among the skeletons made of concrete, the skeleton made of cellular concrete is preferable.

Examples of the room temperature curable adhesives include urethane adhesives, epoxy adhesives, nitrile adhesives, polyester adhesives, phenolic adhesives, polyvinyl ester adhesives and acrylic adhesives. However, acrylic adhesives are preferred. The acrylic adhesive has an effect that the retaining force of the stopper is excellent not only in the dry state but also in the wet state.

The composition of the acrylic adhesive is (a)
It is preferably composed of (meth) acrylate, (b) oxidizing agent and (c) decomposition accelerator. The acrylic adhesive is preferably blended with an acrylic adhesive composed of 0.5 to 10 parts by weight of an oxidizing agent and 0.1 to 10 parts by weight of a decomposition accelerator with respect to 100 parts by weight of (meth) acrylate.

The (a) (meth) acrylate used in the present invention means one having a (meth) acryloyl group in one molecule, and examples thereof include monofunctional (meth) acrylate and polyfunctional (meth) acrylate.

The monofunctional (meth) acrylate is one having one (meth) acryloyl group in one molecule.
For example, (meth) acrylic acid, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth)
Acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, isodecyl (meth) acrylate,
Lauryl (meth) acrylate, stearyl (meth) acrylate, phenyl (meth) acrylate, cyclohexyl (meth) acrylate, dicyclopentanyl (meth) acrylate, dicyclopentenyl (meth) acrylate -, Isobornyl (meth) acrylate, methoxylated cyclodecatriene (meth) acrylate, dicyclopentenyloxyethyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (Meth) acrylate, 3-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, polyethylene glycol mono (meth) acrylate, polypropylene glycol mono (meth) acrylate Alkyloxy polyethylene glycol mono (meth) ac Les -, alkyl oxy polypropylene glycol - mono (meth) acrylate - DOO, phenoxy polyethylene glycol - mono (meth) acrylate -
G, phenoxy polypropylene glycol mono (meta)
Acrylate, tetrahydrofurfuryl (meth) acrylate, 2-hydroxy-3-phenoxypropyl (meth) acrylate, dicyclopentenyloxyethyl (meth) acrylate, glycidyl (meth) acrylate
, Caprolactone-modified tetrahydrofurfuryl (meth) acrylate, 3-chloro-2-hydroxypropyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate, N, N-diethylaminoethyl ( (Meth) acrylate, t-butylaminoethyl (meth) acrylate, morpholine (meth) acrylate,
Ethoxycarbonylmethyl (meth) acrylate, ethylene oxide modified phthalic acid (meth) acrylate, ethylene oxide modified succinic acid (meth) acrylate, trifluoroethyl (meth) acrylate, tetrafluoropropyl (meth) acrylate And 2-hydroxy-3-
(Meth) acryloyloxypropyl trimethyl ammonium chloride etc. are mentioned.

A polyfunctional (meth) acrylate is 1
It means one having one (meth) acryloyl group in the molecule. For example, polyethylene glycol di (meth) acrylate, polyglycerol di (meth) acrylate, polypropylene glycol di (meth) acrylate, polybutylene glycol di (meth) acrylate, 1,4-
Butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol Rutetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, tris (meth) acryloyloxyethyl isocyanurate, 2,2-bis (4
-(Meth) acryloxyphenyl) propane, 2,2-
Bis (4- (meth) acryloxyethoxyphenyl) propane, 2,2-bis (4- (meth) acryloxydiethoxyphenyl) propane, 2,2-bis (4- (meth) acryloxypropoxyphenyl) propane , 2,
2-bis (4- (meth) acryloxytetraethoxyphenyl) propane, epoxy acrylate "biscoat # 540" (Osaka Organic Chemical Industry Co., Ltd.), epoxy acrylate "epoxy ester 3000M" (Kyoeisha Chemical Co., Ltd.), polyester acrylate " Aronix M-6
100 "(Toa Gosei Co., Ltd.), urethane acrylate" Aronix M-1100 "(Toa Gosei Co., Ltd.), polybutadiene acrylate" TE-2000 "(Nippon Soda Co., Ltd.), acrylonitrile butadiene acrylate" Hy "
car VTBNX "(manufactured by Ube Industries, Ltd.) and the like.

These (meth) acrylates are characterized in that they are excellent in holding power of the stopper to the surface of concrete and the like under wet and dry conditions. In order to further improve the holding power of the stopper, the ratio of monofunctional (meth) acrylate: polyfunctional (meth) acrylate is 10 to 95.
% By weight: preferably 90 to 5% by weight, 20 to 20
95% by weight: more preferably 80 to 5% by weight. In any range other than the above, the holding power may decrease.

In the present invention, the combined use of (b) an oxidant and (c) a decomposition accelerator accelerates the curing action when the contact with air is interrupted in the gap between the body and the stopper. Have.

(B) The oxidizing agent functions as a so-called radical polymerization initiator. Examples of the organic peroxide include (1) to (8).

(1) Ketone peroxides: methyl ethyl ketone peroxide, cyclohexanone peroxide, 3,3,5-trimethylcyclohexanone peroxide, methylcyclohexanone peroxide,
Methyl acetoacetate peroxide, acetylacetone peroxide, etc.

(2) Peroxyketals: 1,1-bis (tert-butylperoxy) -3,3,5-trimethylcyclohexane, 1,1-bis (tert-butylperoxy) cyclohexane, 2,2 -Bis (tert-butylperoxy) octane, normal butyl-4,4-bis (tert-butylperoxy) valerate and 2,2-bis (tert-butylperoxy) butane.

(3) Hydroperoxides: tertiary butyl hydroperoxide, cumene hydroperoxide, diisopropylbenzene hydroperoxide, paramenthane hydroperoxide,
2,5-dimethylhexane-2,5-dihydroperoxide and 1,1,3,3-tetramethylbutyl hydroperoxide.

(4) Dialkyl peroxides: ditertiary butyl peroxide, tertiary butyl cumyl peroxide, dicumyl peroxide, α,
α'-bis (tert-butylperoxy-meta-isopropyl) benzene, 2,5-dimethyl-2,5-di (tert-butylperoxy) hexane and 2,5
-Dimethyl-2,5-di (tert-butylperoxy) hexyne-3 and the like.

(5) Diacyl peroxides: acetyl peroxide, isobutyl peroxide, octanoyl peroxide, decanoyl peroxide, laurinoyl peroxide, 3,3,5-trimethylhexanoyl peroxide, succinic acid peroxide Oxide, benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, meta-toluoyl peroxide and the like.

(6) Peroxydicarbonates: diisopropyl peroxydicarbonate, di-2-ethylhexyl peroxydicarbonate, dinormal propyl peroxydicarbonate, bis (4-tert-butylcyclohexyl) peroxydicarbonate, Di-2-ethoxyethyl peroxydicarbonate, dimethoxyisopropyl peroxydicarbonate, di (3
-Methyl-3-methoxybutyl) peroxydicarbonate and diallylperoxydicarbonate.

(7) Peroxyesters: tert-butyl peroxyacetate, tert-butyl peroxyisobutyrate, tert-butyl peroxypivalate, tert-butyl peroxy neodecanoate, cumyl peroxy neo Decanoate, tert-butylperoxy-2-ethylhexanoate, tert-butylperoxy-3,3,5-trimethylhexanoate, tert-butylperoxylaurate, tert-butylperoxybenzoate, diter Shary butyl peroxyisophthalate,
2,5-Dimethyl-2,5-di (benzoylperoxy) hexane, tertiary butyl peroxy maleic acid, tertiary butyl peroxy isopropyl carbonate, cumyl peroxy octoate, tertiary hexyl peroxy neodecanoate , Tertiary hexyl peroxypivalate, tertiary butyl peroxy neohexanoate, tertiary hexyl peroxy neohexanoate, cumylperoxy neohexanoate and the like.

(8) Other organic peroxides: acetylcyclohexyl sulfonyl peroxide, tertiary butyl peroxyallyl carbonate, etc.

Further, as the oxidizing agent other than the organic peroxide,
Examples include azo compounds such as (1) to (5).

(1) Azonitrile compounds: azobisisobutyronitrile, 2,2'-azobis (4-methoxy-2,4-dimethylvaleronitrile), 1,1'-azobis (cyclohexane-1-carbo) Nitrile), 1-
[(1-Cyano-1-methylethyl) azo] formamide, 2-phenylazo-4-methoxy-2,4-dimethylvaleronitrile and the like.

(2) Azoamidine compounds: 2,2'-
Azobis (2-methylpropionamidine) dihydrochloride and the like.

(3) Cyclic azoamidine compounds: 2,2'-azobis [2- (2-imidazoline-2)
-Yl) propane] etc.

(4) Azoamide compounds: 2,2'-azobis {2-methyl-normal- [1,1-bis (hydroxymethyl) -2-hydroxyethyl] propionamide} and 2,2'-azobis {2 -Methyl-normal- [1,1-bis (hydroxymethyl) ethyl] propionamide} and the like.

(5) Alkylazo compounds: 2,2'-
Azobis (2,4,4-trimethylpentane) and the like. One or more of these oxidizing agents can be used.

The blending amount of (b) is preferably 0.5 to 10 parts by weight with respect to 100 parts by weight of (a). If it is less than 0.5 parts by weight, the curing will be slow, and if it exceeds 10 parts by weight, the curing speed or the like will not be improved, but rather the holding force of the stopper may be lowered.

The decomposition promoter (c) is a compound that promotes the decomposition of the oxidant. Examples of the decomposition accelerator include the following compounds such as thiourea derivatives, amines, organic acid metal salts, organometallic chelate compounds, and condensation reaction products of aldehyde and amine.

(1) Thiourea derivative: diethyl thiourea, dibutyl thiourea, ethylene thiourea, tetramethyl thiourea, mercaptobenzimidazole, benzoyl thiourea and the like.

(2) Amines: N, N-diethyl-p-
Toluidine, N, N-dimethyl-p-toluidine, N,
N-diisopropanol-p-toluidine, triethylamine, tripropylamine, ethyldiethanolamine, N, N-dimethylaniline, ethylenediamine, triethanolamine and the like.

(3) Organic acid metal salts: cobalt naphthenate, copper naphthenate, zinc naphthenate and the like.

(4) Organometallic chelate compound: copper acetylacetonate, titanium acetylacetonate, manganese acetylacetonate, chromium acetylacetonate, iron acetylacetonate, vanadium acetylacetonate, cobalt acetylacetonate and cobalt octene- Etc. Among these, organic acid metal salts, organic metal chelate compounds and thiourea derivatives are preferable.
One or more of these curing accelerators can be used.

The compounding amount of (c) is preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of (a). If it is less than 0.1 parts by weight, the curing will be slow, and if it exceeds 10 parts by weight, the curing speed or the like will not be improved, and rather the holding force may be lowered.

It should be noted that the components of the room temperature curing type adhesive which does not contain the oxidizing agent and the decomposition accelerator are divided into two parts, and the oxidizing agent is added to one side and the decomposition accelerator is added to the other side to form a two-part type room temperature curing type adhesive. It is also possible to use it as an agent.

When used as a two-part type room temperature curing adhesive, one component is sealed in a microcapsule or container and placed in an insertion hole or a stopper, and the stopper is inserted into the insertion hole. At this time, the microcapsules or containers are broken, so that a strong holding force can be exhibited. For the microcapsules and containers, for example, Japanese Patent Publication No. 58-46617 and Japanese Patent Laid-Open No.
What was described in 1-122400 can be used.

In the present invention, it is preferable to use an inorganic filler from the viewpoint of improving the workability by adjusting the viscosity and thixotropy of the civil engineering and construction repair material of the present invention to appropriate levels. Depending on the application site, a large amount of repair material may be required. At this time, if a predetermined strength can be achieved, it is economically preferable to increase the amount of filler and reduce the amount of adhesive as much as possible.

The inorganic filler used in the present invention includes crystalline silica powder, fused silica powder, spherical silica powder, silica powder such as fumed silica, silica sand, carbon black, wollastonite, clay, titanium oxide. , Magnesium oxide, iron oxide, bentonite, mica, lead chromate, nickel slag, aluminum hydroxide, alumina powder including spherical powder, stainless powder, silicon carbide powder, silicon nitride powder, boron nitride powder, talc powder, carbonic acid Examples thereof include calcium powder, glass beads, shirasu balloon, aluminum powder and titanium powder.

The blending amount of the inorganic filler is preferably 0.1 to 500 parts by weight, and 1 to 30 parts by weight, relative to 100 parts by weight of (a).
0 weight part is more preferable, and 100 to 150 weight part is the most preferable. If less than 0.1 part by weight, the desired viscosity and /
Alternatively, the properties as a repairing material may be deteriorated such that thixotropy cannot be obtained, and if it exceeds 500 parts by weight, workability may be deteriorated, and the repairing material may become brittle.

An organic filler may be used in combination with the inorganic filler within a range not impairing the object of the present invention. Examples of organic fillers include polyethylene powder, corta, urethane resin powder, (meth) acrylic resin powder, silicone resin powder,
Examples thereof include fluororesin powder, phenol resin powder, wood powder and recycled rubber powder.

Further, for the purpose of improving strength and heat resistance, various glass fibers, carbon fibers,
Various aramid fibers and fibrous materials such as nylon fibers may be used in combination.

When an acrylic adhesive is used, a small amount of polymerization inhibitor can be used to improve its storage stability.

Examples of the polymerization inhibitor include methyl hydroquinone, hydroquinone, catechol, hydroquinone monomethyl ether, monotertiary butyl hydroquinone, 2,5-ditertiary butyl hydroquinone, p-benzoquinone, 2,5-diphenyl-p-benzoquinone, 2,5-ditertiary butyl-p-benzoquinone, picric acid, phenothiazine, tertiary butyl catechol, 2-butyl-4-hydroxyanisole, 2,6-ditertiary butyl-p-cresol and the like can be mentioned.

The blending amount of these polymerization inhibitors is (a) 1
Preferably 0.001 to 3 parts by weight with respect to 00 parts by weight,
It is more preferably 0.01 to 2 parts by weight. 0.001
If it is less than 3 parts by weight, the storage stability will decrease, and if it exceeds 3 parts by weight, the adhesiveness will tend to decrease and the curing time may be prolonged.

The room temperature curable adhesive of the present invention contains various commonly used elastomers, solvents, extenders, reinforcing materials, plasticizers, thickeners, etc. within the range not impairing the object of the present invention.
Additives such as thixotropy imparting agents, silane coupling agents, titanate coupling agents, chelating agents, dyes, pigments, flame retardants, surfactants and fillers can be used.

[0059]

EXAMPLES The present invention will be specifically described below with reference to examples. As concrete, a cellular concrete having a thickness of 100 mm and a compressive strength of 40 kg / cm ² was used. The test of Test Examples 1 to 3 was performed using a wood screw having a diameter of 4.5 mm and a length of 50 mm as a stopper. The results are shown in Tables 1 to 5.

The dry surface pull-out strength was measured at 23 ° C.
Aerated concrete that had been left to dry for 7 days under the condition of a humidity of 50% was used. To measure the wet surface pull-out strength,
The dried aerated concrete was further left in water at 23 ° C. for 24 hours, and then the wetness of the surface of the specimen was wiped off with a cloth.

Test Example 1 A horizontal hole was made in dry-faced aerated concrete, and a hole for inserting a stopper having a diameter of 6 mm and a depth of 55 mm was horizontally drilled in this hole. A room temperature curable adhesive having the composition, viscosity and thixotropy shown in Tables 1 to 5 was injected into the insertion hole with an injector. The injection amount was about 90% in each insertion hole. Then, the sagging condition and workability of the room temperature curable adhesive from the insertion hole were observed.

Regarding the degree of sagging, the case where the room temperature-curable adhesive did not drip from the insertion hole was ○, the case where the room temperature-curable adhesive dripped slightly was △, and the case where the room temperature-curable adhesive dripped from the insertion hole was ×.
And Regarding workability, when the room temperature curing adhesive is easy to transfer to the injector, when it is easy to discharge the room temperature curing adhesive from the injector ○, it is difficult to transfer the room temperature curing adhesive to the injector. Therefore, the case where it was difficult to eject the room temperature curable adhesive was marked with x.

Test Example 2 As a fastener, a cold setting adhesive having the composition, viscosity and thixotropy shown in Tables 1 to 5 was applied to the above wood screw with a brush, and the sag of the cold setting adhesive from the wood screw was measured. And the workability was observed.

Regarding the degree of sagging, the case where the room temperature-curing adhesive did not drip from the wooden screw was marked with ◯, the case where it dripped a little was marked with Δ, and the case where all the room temperature-curing adhesive fell from the wooden screw was marked with x. Regarding workability, ○ When the cold-curing adhesive is difficult to attach to the brush and it is easy to apply the cold-curing adhesive to the stopper ○, it is difficult to attach the cold-curing adhesive to the brush, and the curing is normal-temperature to the stopper The case where it was difficult to apply the mold adhesive was marked with x.

Test Example 3 In Test Example 1, the above wood screw was screwed into the insertion hole in the cellular concrete in which the room temperature curing adhesive was injected into the insertion hole. After that, the mixture was allowed to stand at room temperature for 24 hours to cure the room temperature curable adhesive, and the pull-out strength per screw was measured. The results are shown in Tables 1 to 5.

[0066]

[Table 1]

[0067]

[Table 2]

[0068]

[Table 3]

[0069]

[Table 4]

[0070]

[Table 5]

[0071]

As described above, the present invention relates to a method of attaching a stopper to a body of a building or the like, and exhibits a mounting state in which the retaining force of the stopper to the body is large. Furthermore, the cold-setting adhesive does not drip when the cold-setting adhesive is injected into the insertion hole for inserting the stopper or when the cold-setting adhesive is attached to the stopper for insertion. It has an effect that it can be easily and stably attached.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tsunehiko Shimizu 1135 Nakamura, Shibukawa City, Gunma Denki Kagaku Kogyo Co., Ltd. Shibukawa Plant

Claims (3)

[Claims] 1. A hole is made in a skeleton, a room temperature curing adhesive having a viscosity of 500 cps or more and a thixotropy of 1.1 or more is placed in the hole or the stopper, and then the stopper is inserted into the hole. A method for attaching a stopper, which is characterized in that 2. The method for attaching a stopper according to claim 1, wherein the skeleton is concrete. 3. The method for attaching a stopper to a skeleton according to claim 1 or 2, wherein the room temperature curable adhesive comprises (a) (meth) acrylate, (b) an oxidizing agent and (c) a decomposition accelerator. .