JP2021156430A - Material for locating gas leak, method for locating gas leak, material for repairing gas leak, method for repairing gas leak, and device for repairing gas leak - Google Patents

Abstract

To provide: a material for locating a gas leak and a method for locating a gas leak which enable a gas leak to be located easily by simple operation of applying the material to suspected gas leaks; and a material for repairing a gas leak, a method for repairing a gas leak and a device for repairing a gas leak which enable a gas leak to be repaired easily in a short time without the need for locating the gas leak in advance even if a large amount of gas is leaked by the gas leak.SOLUTION: Provided is a material 3 for locating gas leaks, which is to be applied to suspected gas leaks to locate a gas leak. If the viscosity of the material at 25°C and a shear rate of 0.1 s-1 is expressed by A (Pa s) and the viscosity of the material at 25°C and a shear rate of 10 s-1 is expressed by B (Pa s), then the relationship A/B≥21.0 is satisfied. The material 3 after cured has an elastic modulus of 10 MPa or more at 50°C.SELECTED DRAWING: Figure 7

Description

The present invention relates to an air leak location identification material and an air leak location identification method, an air leak location repair material and an air leak location repair method, and an air leak location repair device.

In the conventional method of repairing an air leak point, it is necessary to identify the air leak point, and the repair is performed by welding or using an air leak point repair material made of epoxy resin in a state where no gas is leaking. On the other hand, in the state of gas leakage, it is necessary to apply a pressure higher than the leakage pressure to hold down the resin coating portion until the epoxy resin is cured.
For example, in a method of repairing an air leak point such as a gas filling device or a pipe through which gas flows, after identifying the air leak point, a photocurable resin is applied to the leaked part using a pressurizing tool and pressed. A method of temporarily stopping air leakage and curing the photocurable resin while pressing it has been proposed (see, for example, Patent Document 1).

JP-A-2017-89878

However, in the method described in Patent Document 1, it is necessary to specify the leaked part in advance. Also, in the case of photocuring at a long wavelength, it takes time to cure, so it is necessary to keep pressing with a pressurizing tool for the time until curing, so if there is a weak pressing part, air leaks or leaks again. There is a problem that it cannot be repaired if the pressure of qi is high.

An object of the present invention is to solve the above-mentioned problems in the past and to achieve the following object. That is, according to the present invention, a material for identifying an air leak location, a method for identifying an air leak location, a method for identifying an air leak location, and an air leak location in advance, which can easily identify an air leak location by a simple operation of applying it to a location suspected of leaking air. It is not necessary to specify, and even if the amount of air leaked from the leaked part is large, it is possible to easily repair the leaked part in a short time. The purpose is.

The means for solving the above-mentioned problems are as follows. That is,
<1> A material for identifying an air leak that is applied to a suspected air leak and is used to identify the air leak.
Assuming that the viscosity at 25 ° C. at a share rate of 0.1 s ^-1 is A (Pa · s) and the viscosity at 25 ° C. at a share rate of 10 s ^-1 is B (Pa · s), the following equation A / B ≧ 21.0, is satisfied,
It is a material for identifying an air leak location, characterized in that the elastic modulus E'at 50 ° C. after curing is 10 MPa or more.
<2> The air leakage location specifying material according to <1> above, wherein the viscosity A at 25 ° C. at a share rate of 0.1 s ^{-1 is 500 Pa · s or more.}
<3> The air leakage location specifying material according to any one of <1> to <2>, which contains a curable resin composition.
<4> The air leakage location specifying material according to <3>, wherein the curable resin composition contains a polymerizable compound and / or a polymerization initiator.
<5> The material for identifying an air leak location according to <4>, which further contains a colorant.
<6> The material for identifying an air leak location according to any one of <1> to <5>, which is cured by irradiation with light having a wavelength of 420 nm or less.
<7> The air leakage location repair material according to any one of <1> to <6> above, wherein the air leakage location specifying material is used for repairing the air leakage location.
<8> A coating film made of the material for identifying an air leakage location according to any one of <1> to <6> is formed at a location where air leakage is suspected, and the coating film is generated by the air leakage. It is a method for identifying an air leak location, which comprises a step of identifying an air leak location for identifying a location of a hole as an air leak location.
<9> A curing step of curing the coating film containing the leaked portion specified by the leaked portion specifying method described in <8> above, and a curing step of curing the coating film containing the leaked portion.
A repair step of closing the leaked portion cured by the leaked portion repair material according to <7> and curing the leaked portion repair material, and
It is a method of repairing a leaked part, which is characterized by including.
<10> A step of curing the coating film with a tubular member arranged at the leaked portion of the coating film including the leaked portion specified by the method for identifying the leaked portion according to <8>.
A step of filling the tubular member with the air leak repair material according to <7>, connecting the on-off valve to the tubular member opened by air pressure in an open state, and closing the on-off valve.
It is a method of repairing a leaked part, which is characterized by including.
<11> It has a light source and a film-like member or a tape-like member that transmits ultraviolet rays to the irradiation surface of the light source.
The leaky spot repairing device is characterized in that the leaky spot repairing material according to <7> can be mounted on the film-shaped member and the tape-shaped member.
<12> The air leak repair device according to <11>, wherein the surfaces of the film-like member and the tape-like member are mold-released.
<13> A method for repairing an air leak portion, which comprises using the air leak location repair device according to any one of <11> to <12>.

According to the present invention, the above-mentioned problems in the prior art can be solved, the above-mentioned object can be achieved, and the leaked portion can be easily identified by a simple operation of simply applying the leaked portion to the portion suspected of leaking. Leakage location identification material and air leakage location identification method, it is not necessary to identify the air leakage location in advance, and even if the amount of air leakage from the air leakage location is large, it can be easily repaired in a short time. It is possible to provide a material, a method for repairing an air leak, and an apparatus for repairing an air leak.

FIG. 1 is a photograph showing an example of a gas pipe to be repaired for air leakage. FIG. 2 is a photograph showing an example of the top surface of the closing flange portion of the gas pipe. FIG. 3 is a photograph showing an example of the bottom surface of the closing flange portion of the gas pipe. FIG. 4 is a photograph showing an example of the state of the air leakage portion repair device of the present invention on the light irradiation surface side. FIG. 5 is a photograph showing an example of the state of the air leak repair device of the present invention on the light source side. FIG. 6 shows an example of the method for repairing the leaked portion of the first embodiment, and is a photograph showing a state before repairing the leaked portion. FIG. 7 shows an example of the method for repairing an air leak portion according to the first embodiment, and is a photograph showing a state in which a material for identifying an air leak location is applied to a portion suspected of leaking. FIG. 8 is a photograph showing an example of the method for repairing an air leak portion according to the first embodiment, showing a state in which holes are formed in the coating film due to air leakage. FIG. 9 shows an example of the method for repairing an air leak portion according to the first embodiment, and is a photograph showing a state in which the coating film including the air leak portion is cured. FIG. 10 is a photograph showing an example of the method for repairing an air leak portion according to the first embodiment and showing the state of the cured air leak portion. FIG. 11 shows an example of the leaked portion repair method of the first embodiment, and is a photograph showing a state in which the leaked portion is closed with the leaked portion repair material and the leaked portion repair material is cured. FIG. 12 shows an example of the method for repairing the leaked portion of the first embodiment, and is a photograph showing a state in which the repair of the leaked portion is completed. FIG. 13 shows an example of the method for identifying the leaked portion of the second embodiment, and is a photograph showing the leaked portion. FIG. 14 is a photograph showing an example of the method for identifying the leaked portion of the second embodiment, showing a state in which the leaked portion identifying material is applied to the leaked portion. FIG. 15 is a photograph showing an example of the method for identifying the leaked portion of the second embodiment and showing a state in which a tube is provided at the leaked portion. FIG. 16 is a photograph showing an example of an on-off valve used in the method for identifying an air leak portion according to the second embodiment. FIG. 17 shows an example of the method for repairing the leaked portion of the second embodiment, and is a photograph showing the leaked portion. FIG. 18 shows an example of the method for repairing an air leak portion according to the second embodiment, and is a photograph showing a state in which a tube is provided at the air leak portion. FIG. 19 shows an example of the method for repairing an air leak portion according to the second embodiment, and is a photograph showing a state in which an on-off valve is connected to the tube. FIG. 20 shows an example of the method for repairing an air leak portion according to the second embodiment, and is a photograph showing a state in which the on-off valve is closed. FIG. 21 shows an example of the method for repairing the leaked portion of the second embodiment, and is a photograph showing a state in which the repair of the leaked portion is completed.

(Material for identifying air leaks)
The leak location identifying material of the present invention is an air leak location identifying material used to identify a leak location by applying it to a location suspected of leaking, and when the ^{share rate is 0.1 s -1.} Assuming that the viscosity at 25 ° C. is A (Pa · s) and the viscosity at 25 ° C. at a share rate of 10s ^-1 is B (Pa · s), the following equation, A / B ≧ 21.0, is satisfied. The elastic modulus E'at 50 ° C. after curing is 10 MPa or more.

According to the leak location identifying material of the present invention, the leak location can be easily identified by a simple operation of applying the material to a portion suspected of leaking.

The portion suspected of leaking means a range including the leaking portion in the object for which the leaking portion is specified or repaired, and is a range including the portion where the leak may occur.
The method of applying the material for identifying the leaked part is not particularly limited and may be appropriately selected depending on the purpose, and various coating methods and the like can be mentioned.
Examples of the coating method include brush coating, blade coating method, gravure coating method, gravure offset coating method, wire bar coating method, bar coating method, roll coating method, knife coating method, air knife coating method, comma coating method, and U. Commer coat method, AKKU coat method, smoothing coat method, micro gravure coat method, reverse roll coat method, 4 to 5 roll coat method, dip coat method, curtain coat method, slide coat method, die coat method, inkjet method, etc. Can be mentioned.

Assuming that the viscosity at 25 ° C. at a share rate of 0.1 s ^-1 is A (Pa · s) and the viscosity at 25 ° C. at a share rate of 10 s ^-1 is B (Pa · s), the following equation It is preferable that the thixotropy (A / B) ≥ 21.0 is satisfied, and the following formula, the thixotropy (A / B) ≥ 80, is satisfied.
The viscosity A at 25 ° C. when the share rate is 0.1 s ^-1 is preferably 500 Pa · s or more, and more preferably 1000 Pa · s or more.

By using an air leak location identification material with a Tixo ratio (A / B) of 21.0 or more, when an air leak location identification material is applied to a location where there is a suspicion of air leakage, leakage occurs due to the air pressure at the leak location. Since the air leak location identification material is not blown off and holes are formed in the coating film of the air leak location while maintaining a certain thickness, the air leak location can be easily and reliably identified.
If the viscosity A at 25 ° C. at a share rate of 0.1 s ^-1 is less than 500 Pa · s, the applied air leak location identification material may be blown off due to the air pressure leak at the air leak location. It becomes difficult to repair the part.
Further, when the thixotropy (A / B) of the air leakage location specifying material is less than 21.0 ^{and the viscosity A at 25 ° C. at a share rate of 0.1 s -1} is 500 Pa · s or more, the coating is performed. No pores are formed in the film, and cavities are formed at the coating interface.
When the thixotropy (A / B) ^{of the leak location identification material is 21.0 or more and the viscosity A at 25 ° C. at a share rate of 0.1 s -1} is 500 Pa · s or more, the leak location It is possible to easily identify the leaked part and repair the leaked part using the same leaked part specifying material.
Here, the viscosity of the air leakage location specifying material can be measured using, for example, AR-G2 manufactured by TA Instrument.
Using a cone plate with a diameter of 20 mm and an angle of 2 °, measurement is performed in the range of ^{share rate (shear velocity) of 0.01 s -1 to} 100 s ^{-1 in an environment of a temperature of 25 ° C.} The viscosity is evaluated with a share rate of 0.1 s ^-1. Further, the ratio (A / B) of the viscosity A at 25 ° C. when the share rate is 0.1 s ^-1 and the viscosity B at 25 ° C. when the ^{share rate is 10 s -1 is defined as the thixotropy.}

The elastic modulus E'at 50 ° C. after curing is 10 MPa or more, preferably 25 MPa or more.
If an air leak location identification material having an elastic modulus E'at 50 ° C. at 50 ° C. after curing is used, holes are easily formed in the coating film due to the air leak pressure, so that the air leak location can be easily identified. , It can be confirmed that the air leakage has stopped for 1 minute or more in the air leakage sealing property test. Further, when an air leak location specifying material having an elastic modulus E'at 50 ° C. after curing of less than 10 MPa was used, air leaked (immediately leaked) in less than 1 minute in the air leakage sealability test. It was confirmed in the air leakage sealability test that the air leakage was stopped for 1 hour or more when the material for specifying the air leakage location having the elastic modulus E'at 50 ° C. after curing was 25 MPa or more was used.
Here, the elastic modulus E'at 50 ° C. after curing is obtained by applying a leak location specifying material as a sample so that the thickness becomes 1 mm, curing the material using UV light U1 manufactured by JAXMAN, and RSAIII manufactured by TA Instrument. In a tensile mode, frequency 10 Hz, heating rate 10 ° C./min. , Temperature dispersion measurement is performed in the range of 25 ° C. to 100 ° C., and the value of elastic modulus E'at 50 ° C. after curing is obtained.

In the present invention, it is preferable to use a leak location identifying material that is cured by light irradiation having a wavelength of 420 nm or less.
By using an air leak location identification material that cures with light having a wavelength of 420 nm or less, it is possible to cure the air leak location identification material in a shorter time than when using an air leak location identification material that cures with long wavelength light. It can be done, and the working time can be greatly reduced.

The leak location identifying material of the present invention contains a curable resin composition.
The curable resin composition contains a polymerizable compound and / or a polymerization initiator, preferably contains a sensitizer, a photoacid generator, and a colorant, and further contains other components as necessary.
The curable resin composition can be cured by various curing methods such as photocuring, thermosetting, two-component mixed type (for example, two-component mixed type acrylic resin, epoxy resin, etc.), moisture curing, or a combination thereof. can. Among these, photocuring is preferable from the viewpoint of curing speed.

<Polymerizable compound>
The polymerizable compound is a compound that undergoes a polymerization reaction by heating and active energy rays (ultraviolet rays, electron beams, etc.) and is cured, and examples thereof include a radical polymerizable group-containing compound and a cationically polymerizable group-containing compound.

<< Radical Polymerizable Group-Containing Compound >>
The radically polymerizable group-containing compound (radical polymerization component) is not particularly limited as long as it is a compound having a radically polymerizable group, and can be appropriately selected depending on the intended purpose.
Examples of the radically polymerizable group include a (meth) acryloyloxy group.
Here, the (meth) acryloyloxy group means an acryloyloxy group or a methacryloyloxy group.

The radical-polymerizable group-containing compound may have one radical-polymerizable group or two or more radical-polymerizable groups.

Examples of the radically polymerizable group-containing compound include an ester compound obtained by reacting (meth) acrylic acid with a compound having a hydroxyl group, and an epoxy obtained by reacting (meth) acrylic acid with an epoxy compound. Examples thereof include meta) acrylate and urethane (meth) acrylate obtained by reacting an isocyanate with a (meth) acrylic acid derivative having a hydroxyl group.
Here, (meth) acrylic means acrylic or methacrylic, and (meth) acrylate means acrylate or methacrylate.

Examples of the radically polymerizable group-containing compound having one radically polymerizable group include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and 2-hydroxy. Butyl (meth) acrylate, isobutyl (meth) acrylate, t-butyl (meth) acrylate, isooctyl (meth) acrylate, lauryl (meth) acrylate, stearyl (meth) acrylate, isobornyl (meth) acrylate, cyclohexyl (meth) acrylate, 2-methoxyethyl (meth) acrylate, methoxyethylene glycol (meth) acrylate, 2-ethoxyethyl (meth) acrylate, tetrahydrofurfuryl (meth) acrylate, benzyl (meth) acrylate, ethylcarbitol (meth) acrylate, phenoxyethyl (Meta) acrylate, phenoxydiethylene glycol (meth) acrylate, phenoxypolyethylene glycol (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, 2,2,2-trifluoroethyl (meth) acrylate, 2,2,3,3- Tetrafluoropropyl (meth) acrylate, 1H, 1H, 5H-octafluoropentyl (meth) acrylate, imide (meth) acrylate, methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, propyl ( Meta) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isononyl (meth) acrylate, isomyristyl (meth) acrylate, isostearyl (meth) acrylate, 2-butoxyethyl (meth) acrylate, 2 -Phenoxyethyl (meth) acrylate, bicyclopentenyl (meth) acrylate, isodecyl (meth) acrylate, diethylaminoethyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, 2- (meth) acryloyloxyethyl succinic acid, 2- Examples thereof include (meth) acryloyloxyethyl hexahydrophthalic acid, 2- (meth) acryloyloxyethyl 2-hydroxypropylphthalate, and 2- (meth) acryloyloxyethyl phosphate. These may be used alone or in combination of two or more.

Examples of the radically polymerizable group-containing compound having two radically polymerizable groups include 1,4-butanediol di (meth) acrylate, 1,3-butanediol di (meth) acrylate, and 1,6-hexanediol. Di (meth) acrylate, 1,9-nonanediol di (meth) acrylate, 1,10-decanediol di (meth) acrylate, 2-n-butyl-2-ethyl-1,3-propanediol di (meth) Acrylate, dipropylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, polypropylene glycol (meth) acrylate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate , Polyethylene glycol di (meth) acrylate, propylene oxide-added bisphenol A di (meth) acrylate, ethylene oxide-added bisphenol A di (meth) acrylate, ethylene oxide-added bisphenol F di (meth) acrylate, dimethylol dicyclopentadienyldi (meth) ) Acrylate, neopentyl glycol di (meth) acrylate, ethylene oxide-modified isocyanurate di (meth) acrylate, 2-hydroxy-3- (meth) acryloyloxypropyl (meth) acrylate, carbonatediol di (meth) acrylate, polyether Examples thereof include diol di (meth) acrylate, polyester diol di (meth) acrylate, polycaprolactone diol di (meth) acrylate, and polybutadiene diol di (meth) acrylate. These may be used alone or in combination of two or more.

Examples of the radically polymerizable group-containing compound having three or more radically polymerizable groups include pentaerythritol tri (meth) acrylate, trimethyl propanetri (meth) acrylate, and propylene oxide-added trimethyl propanetri (meth) acrylate. , Ethylene oxide-added trimethylolpropanthry (meth) acrylate, caprolactone-modified trimethylolpropanthry (meth) acrylate, ethylene oxide-added isocyanuric acid tri (meth) acrylate, dipentaerythritol penta (meth) acrylate, dipentaerythritol hexa (meth) acrylate , Ditrimethylol propanetetra (meth) acrylate, pentaerythritol tetra (meth) acrylate, glycerin tri (meth) acrylate, propylene oxide-added glycerin tri (meth) acrylate, tris (meth) acryloyloxyethyl phosphate and the like. These may be used alone or in combination of two or more.

The radically polymerizable group-containing compound may be a so-called oligomer.
Examples of the oligomer include (meth) acrylate oligomers.
Examples of the (meth) acrylate oligomer include polyurethane (meth) acrylate oligomer, polyisoprene (meth) acrylate oligomer, polybutadiene (meth) acrylate oligomer, and polyether (meth) acrylate oligomer. Further, the following acrylic polymer may be provided with a radically polymerizable group.
Acrylic polymer: Copolymer of butyl acrylate, 2-hexyl acrylate, and acrylic acid, and copolymer of cyclohexyl acrylate and methacrylic acid.

The weight average molecular weight of the oligomer is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 1,000 to 100,000, more preferably 2,000 to 80,000, and 5,000. ~ 50,000 is particularly preferable. The weight average molecular weight can be measured by, for example, GPC (gel permeation chromatography).

<< Cationic polymerizable group-containing compound >>
The cationically polymerizable group-containing compound (cationically polymerizable component) is particularly long as it has a functional group (cationically polymerizable group) that reacts with a proton or a carbon cation derived from Bronsted acid or generated by the action of Lewis acid. There is no limitation, and it can be appropriately selected according to the purpose.
The curable resin composition containing the cationically polymerizable group-containing compound may be a one-component type or a two-component type.

Examples of the cationically polymerizable group include an alkoxysilyl group, an epoxy group, a vinyl ether group, and an oxetanyl group. Among these, an alkoxysilyl group and an epoxy group are preferable.

The alkoxysilyl group is not particularly limited and may be appropriately selected depending on the intended purpose, but the group represented by the following general formula (1) is preferable.

ただし、前記一般式（１）中、Ｒ^１は、炭素数１〜３のアルキル基、及び炭素数１〜３のアルコキシ基のいずれかを表す。Ｒ^２、及びＲ^３は、それぞれ独立して、炭素数１〜３のアルキル基を表す。

However, in the general formula (1), R ¹ represents any one of an alkyl group having 1 to 3 carbon atoms and an alkoxy group having 1 to 3 carbon atoms. R ² and R ³ each independently represent an alkyl group having 1 to 3 carbon atoms.

As the alkoxysilyl group, a trimethoxysilyl group, a triethoxysilyl group, a dimethoxymethylsilyl group and a diethoxymethylsilyl group are preferable from the viewpoint of excellent cationic polymerizable property.

ただし、前記一般式（２）中、Ｒ^４は、水素原子、及びメチル基のいずれかを表す。 The epoxy group may be an alicyclic epoxy group or a non-alicyclic epoxy group. Examples of the epoxy group include groups represented by the following general formula (2) and the following general formula (3).

However, in the general formula (2), R ⁴ represents either a hydrogen atom or a methyl group.

The cationically polymerizable group-containing compound further comprises a radically polymerizable group in that the compatibility of the raw materials in the curable resin composition can be improved and the phase separation of the cured product of the curable resin composition can be prevented. It is preferable to have.
In the present invention, the cationically polymerizable group-containing compound having a radically polymerizable group does not belong to the radically polymerizable group-containing compound, but belongs to the cationically polymerizable group-containing compound.

ただし、前記一般式（４）中、Ｒは、水素原子及びメチル基のいずれかを表し、Ｘは、カチオン重合性基を表し、Ｙは、２価の連結基を表す。 The cationically polymerizable group-containing compound having a radically polymerizable group is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include compounds represented by the following general formula (4). ..

However, in the general formula (4), R represents either a hydrogen atom or a methyl group, X represents a cationically polymerizable group, and Y represents a divalent linking group.

Examples of the X include a group represented by the general formula (1), a group represented by the general formula (2), a group represented by the general formula (3), and the like.

Examples of the Y include an alkylene group and an alkyleneoxyalkylene group. Examples of the alkylene group include C _{1 to 6} alkylene groups. Examples of the alkyleneoxyalkylene group include C _{1 to 6 alkyleneoxy C 1 to 6} alkylene groups. Here, C ₁ to 6 represent carbon atoms 1 to 6.

Examples of the cationically polymerizable group-containing compound having a radically polymerizable group as the compound represented by the general formula (4) include 3,4-epoxycyclohexylmethyl (meth) acrylate and (3-ethyloxetane-). 3-Il) methyl acrylate, (3-ethyloxetane-3-yl) methyl methacrylate, glycidyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate glycidyl ether, 2- (2-vinyloxyethoxy) ethyl acrylate, 2 -(2-Vinyloxyethoxy) ethyl metallylate and the like can be mentioned. These may be used alone or in combination of two or more.

<Polymerization initiator>
Examples of the polymerization initiator include a thermal polymerization initiator and a photopolymerization initiator. Among these, a photopolymerization initiator is preferable.
The photopolymerization initiator may be any one capable of generating active species such as radicals and cations by the energy of light (particularly ultraviolet rays) and initiating the polymerization of the polymerizable compound. A cationic polymerization initiator, a base generator, or the like can be used alone or in combination of two or more. Among these, a radical polymerization initiator is preferable.
Examples of the radical polymerization initiator include aromatic ketones, acylphosphine oxide compounds, aromatic onium salt compounds, organic peroxides, thio compounds (thioxanthone compounds, thiophenyl group-containing compounds, etc.), hexaarylbiimidazole compounds, and the like. Examples thereof include ketooxime ester compounds, borate compounds, azinium compounds, metallocene compounds, active ester compounds, compounds having a carbon halogen bond, and alkylamine compounds. These may be used alone or in combination of two or more.

<Sensitizer>
The curable resin composition may also use a sensitizer for the purpose of preventing a decrease in the curing rate due to absorption or concealment of light (particularly ultraviolet rays) when irradiating with light (particularly ultraviolet rays). ..
Examples of the sensitizer include cyclic amine compounds such as aliphatic amines, amines having aromatic groups, and piperidine; urea compounds such as o-tolylthiourea; sodium diethylthiophosphate, soluble salts of aromatic sulfinic acid, and the like. Sulfur compounds; nitrile compounds such as N, N'-di-substituted-p-aminobenzonitrile; phosphorus compounds such as tri-n-butylphosphine and sodium diethyldithiophosfeed; , Tetrahydro-1,3-oxazine compounds, formaldehyde, nitrogen compounds such as condensates of acetaldehyde and diamine, and the like. These may be used alone or in combination of two or more.

<Photoacid generator>
The curable resin composition preferably contains a photoacid generator, which is a compound that absorbs light to generate an acid.
As the photoacid generator, an onium salt is preferable.
Examples of the onium salt include a diazonium salt, an iodonium salt, a sulfonium salt and the like. These may be used alone or in combination of two or more. Among these, iodonium salt and sulfonium salt are preferable from the viewpoint of stability.

<Colorant>
The curable resin composition is preferable because the coating film can be colored by containing a colorant and the repaired portion can be easily found.
The colorant is not particularly limited and may be appropriately selected depending on the intended purpose, and pigments and dyes can be used, and pigments are preferable.
As the pigment, an inorganic pigment or an organic pigment can be used. These may be used alone or in combination of two or more. Moreover, you may use a mixed crystal as a pigment.
As the pigment, for example, black pigment, yellow pigment, magenta pigment, cyan pigment, white pigment, green pigment, orange pigment, glossy color pigment such as gold or silver, metallic pigment and the like can be used.
Inorganic pigments include, for example, titanium oxide, zinc oxide, aluminum oxide, talc, silica, iron oxide, calcium carbonate, barium sulfate, aluminum hydroxide, barium yellow, cadmium red, chrome yellow, as well as contact method, furnace method, thermal. Carbon black produced by a known method such as a method can be used.
Examples of organic pigments include azo pigments and polycyclic pigments (for example, phthalocyanine pigments, perylene pigments, perinone pigments, anthraquinone pigments, quinacridone pigments, dioxazine pigments, indigo pigments, thioindigo pigments, isoindolinone pigments, quinophthalone pigments, etc.). , Dye chelate (for example, basic dye type chelate, acidic dye type chelate, etc.), nitro pigment, nitroso pigment, aniline black and the like. Among these, those having a good affinity for the solvent are preferably used. In addition, resin hollow particles and inorganic hollow particles can also be used.
As a specific example of the pigment, for black, carbon black (CI pigment black 7) such as furnace black, lamp black, acetylene black, channel black, or copper, iron (CI pigment black 11) , Metals such as titanium oxide, and organic pigments such as aniline black (CI pigment black 1).
Further, for color, for example, C.I. I. Pigment Yellow 1, 3, 12, 13, 14, 17, 24, 34, 35, 37, 42 (yellow iron oxide), 53, 55, 74, 81, 83, 95, 97, 98, 100, 101, 104 , 108, 109, 110, 117, 120, 138, 150, 153, 155, 180, 185, 213, C.I. I. Pigment Orange 5, 13, 16, 17, 36, 43, 51, C.I. I. Pigment Red 1, 2, 3, 5, 17, 22, 23, 31, 38, 48: 2 (Permanent Red 2B (Ca)), 48: 3, 48: 4, 49: 1, 52: 2, 53: 1, 57: 1 (Brilliant Carmin 6B), 60: 1, 63: 1, 63: 2, 64: 1, 81, 83, 88, 101 (Bengara), 104, 105, 106, 108 (Cadmium Red), 112, 114, 122 (quinacridone magenta), 123, 146, 149, 166, 168, 170, 172, 177, 178, 179, 184, 185, 190, 193, 202, 207, 208, 209, 213, 219, 224, 254, 264, C.I. I. Pigment Violet 1 (Rhodamine Lake), 3, 5: 1, 16, 19, 23, 38, C.I. I. Pigment Blue 1, 2, 15 (phthalocyanine blue), 15: 1, 15: 2, 15: 3, 15: 4 (phthalocyanine blue), 16, 17: 1, 56, 60, 63, C.I. I. Pigment Green 1, 4, 7, 8, 10, 17, 18, 36 and the like. These may be used alone or in combination of two or more.

-Other ingredients-
The other components are not particularly limited and may be appropriately selected depending on the intended purpose. For example, a surfactant, a viscosity modifier, an adhesive imparting agent, an antioxidant, an antioxidant, a cross-linking accelerator, etc. Examples include UV absorbers, plasticizers, preservatives, dispersants and the like.

According to the material for identifying an air leak portion of the present invention, an air leak location can be easily identified only by a simple operation applied to a portion suspected of leaking.
As the method for identifying the leaked portion using the material for identifying the leaked portion of the present invention, the following method for identifying the leaked portion can be preferably performed.

(How to identify the location of air leak)
The method for identifying an air leak location of the present invention includes an air leak location identification step, and further includes other steps as necessary.

<Process for identifying air leaks>
In the air leakage location identification step, a coating film made of the air leakage location identification material of the present invention is formed at a location where there is a suspicion of air leakage, and the portion of the hole generated by the air leakage in the coating film is the air leakage location. It is a process to specify as.
Before the air leakage location identification material is cured, the air leakage location identification material is liquid, and the coating film formed by applying the air leakage location identification material has holes due to the air leakage pressure. The location of the leak can be easily identified. At this time, the size and shape of the formed holes and the coating film around them may be appropriately adjusted to be easily repaired.
It should be noted that the leaked portion having a small amount of leaked air cannot be identified because the leaked portion does not generate a hole even if the leaked portion specifying material of the present invention is applied. In this case, the leaked portion cannot be specified. The leaked portion can be repaired by curing the applied coating film made of the leaked portion specifying material as it is.

The method for forming the coating film is not particularly limited and may be appropriately selected depending on the intended purpose. For example, a spin coating method, a slit coating method, a dip coating method, a blade coating method, a bar coating method, a spray method, etc. Examples thereof include a letterpress printing method, an intaglio printing method, a screen printing method, a lithographic printing method, a dispense method, and an inkjet method.
The average thickness of the coating film can be appropriately selected depending on the pressure of the leak at the leaked portion, but is preferably 50 μm or more and 5,000 μm or less.

<Other processes>
The other steps are not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a washing step and a drying step.
It is preferable to perform the air leakage location identification step after cleaning the portion suspected of leaking in the cleaning step.

(Repair material for air leaks)
The leaked portion repair material of the present invention uses the leaked portion specifying material of the present invention for repairing an air leaked portion. As the air leakage location repair material of the present invention, the same material as the air leakage location identification material of the present invention is used.

According to the leaked portion repair material of the present invention, it is not necessary to specify the leaked portion in advance, the working method is simple, and the working time can be significantly shortened. Further, since a cavity for collecting air leakage is not required, there is an advantage that it is difficult to peel off and air leakage again.
By repairing the leaked portion specified by the leaked portion specifying material of the present invention using the leaked portion repair material of the present invention, even if the amount of air leak is large, a simple method can be used in a short time. Can be repaired.
As a method for repairing an air leak portion using the air leak location repair material of the present invention, the following air leak location repair method of the present invention can be preferably performed.

(How to repair air leaks)
In the first embodiment, the method for repairing an air leak portion of the present invention includes a curing step and a repair step, and further includes other steps as necessary.

<Curing process>
The curing step is a step of curing the coating film containing the leaked portion specified by the method for identifying the leaked portion of the present invention.
In the curing step, pores are formed in the coating film due to the pressure of the leak in the leaked portion identified by the method for identifying the leaked portion of the present invention. Therefore, the coating film including the pores is cured and coated. Fix the holes formed in the membrane.

Examples of the curing means include heat curing means and photocuring means.
The heat curing means includes means for heating the object to be repaired, and examples thereof include an infrared heater, a hot air heater, and a heating roller. The heating temperature is not particularly limited and may be appropriately selected depending on the intended purpose, but is preferably 50 ° C. or higher and 200 ° C. or lower.

Examples of the photocuring means include an ultraviolet (UV) irradiation lamp and an electron beam irradiation device. It is preferable that the photocuring means is provided with a mechanism for removing ozone.
Examples of the type of the ultraviolet (UV) irradiation lamp include a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, and a metal halide lamp.
The ultra-high pressure mercury lamp is a point light source, but the DeepUV type, which has high light utilization efficiency in combination with an optical system, can irradiate in a short wavelength region.
The metal halide is effective for colored substances because it has a wide wavelength region, and halides of metals such as Pb, Sn, and Fe are used and can be selected according to the absorption spectrum of the photopolymerization initiator. The lamp used for curing is not particularly limited and may be appropriately selected depending on the purpose. For example, a commercially available lamp such as an H lamp, a D lamp, or a V lamp manufactured by FusionSystem is used. can do.

The light to irradiate the coating film in the curing step is not particularly limited and may be appropriately selected depending on the intended purpose, but ultraviolet rays are preferable, near ultraviolet rays are more preferable, and light having a wavelength of 420 nm or less is particularly preferable.
The irradiation time is not particularly limited and can be appropriately selected according to the purpose.

<Repair process>
The repair step is a step of closing the leaked portion cured by the leaked portion repair material of the present invention and curing the leaked portion repair material.
In the curing step, if curing is performed without specifying the leaked part, repair is performed with a cavity or an airway formed inside the leaked part repair material, which makes it difficult to repair the leaked part or repairs. The reliability of the is reduced. In addition, if air leaks again, there is a high possibility that air will leak from a location different from the first leak location, and even if the leaked location is repaired, there is a high possibility that air will leak again from another location. ..
In the present invention, in the curing step, the pores of the coating film in which the leaked portion is specified are closed with the leaked portion repair material, and the closed air leak portion repair material is cured and repaired.
Examples of the method of closing with the leaked portion repair material include burying the leaked portion repair material, covering the leaked portion repair material, and burying and covering the leaked portion repair material.
The light to be irradiated, the curing means, the curing conditions, and the like in the curing of the leaked portion repair material in the repair step are the same as those in the curing step.

<Other processes>
The other steps are not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include a washing step and a drying step.
It is preferable to perform the above curing step after cleaning the portion suspected of leaking in the cleaning step.

In the second aspect, the method for repairing an air leak portion of the present invention is described in a state where a tubular member is arranged at the air leak portion of the coating film including the air leak portion specified by the air leak location identification method of the present invention. After the step of curing the coating film and the material for repairing the leaked portion of the present invention are filled in the tubular member, an on-off valve in an open state is connected to the tubular member opened by the air leakage, and the on-off valve is connected. Includes a closing step and, if necessary, other steps.

(Air leak repair device)
The leak repair device of the present invention has a light source and a film-like member or a tape-like member that transmits ultraviolet rays to the irradiation surface of the light source, and the leak of the present invention is placed on the film-like member or the tape-like member. It is possible to attach a repair material for the air part.
According to the air leakage point repair device of the present invention, the air leakage point repair material attached to the surface of the film-like member closes the pores (air leakage points) of the coating film and irradiates ultraviolet rays to repair the air leakage point. Therefore, even if the amount of air leaked from the leaked part is large, it can be easily repaired in a short time.

<Light source>
Examples of the light source include an ultraviolet (UV) irradiation lamp capable of irradiating light having a wavelength of 420 nm or less.

<Membrane-like member>
The film-like member is not particularly limited in its planar shape, size, material, and structure as long as it can transmit light having a wavelength of 420 nm or less, and can be appropriately selected depending on the intended purpose.
Examples of the planar shape of the film-like member include a circle, an ellipse, a rectangle, a square, and a rhombus.
The material of the film-like member is not particularly limited as long as it can transmit light having a wavelength of 420 nm or less, and can be appropriately selected depending on the intended purpose. Examples thereof include an ultraviolet transmissive resin.
Examples of the ultraviolet transmissive resin include vinyl resins such as polyvinyl chloride and vinylidene chloride, polystyrene resins such as polystyrene and styrene / acrylonitrile / butadiene copolymers, and propylene tetrafluoride / hexafluoride (FEP). Fluorescent resin such as tetrafluoroethylene perfluoroalkoxyethylene copolymer (PFA), polyethylene resin such as ethylene / vinyl acetate copolymer, polyester resin such as polyethylene terephthalate (PET), polypropylene, poly4-methyldentene , Polymethylmethacrylate, polyethylene, cellulose (cellophane), polycarbonate, polyphenylene sulfide, polytetrafluoroethylene (PTFE), polyether ether ketone (PEEK), polyether sulfone (PESU), aramid, polyimide, triacetate and the like. These may be used alone or in combination of two or more.

It is preferable that the surface of the film-like member is mold-released. As a result, the leaky portion repair material of the present invention attached to the surface of the film-like member can be transferred to the leaked portion, and the hole (air leaked portion) of the coating film can be closed.
Examples of the mold release treatment include a treatment of applying fine irregularities to the surface of the film-like member, a silicone coating treatment, a fluorine coating treatment, and the like.

<Tape-like member>
It is preferable to use a tape-shaped member having an adhesive layer on the surface on the light source side and having the surface on the light irradiation side (opposite side) demolded from the viewpoint of being able to be fixed to the irradiation surface of the light source. The mold release process can be performed in the same manner as the film-like member.
The material of the tape-shaped member is not particularly limited as long as it can transmit light having a wavelength of 420 nm or less, and can be appropriately selected according to the purpose, and an ultraviolet-transmitting resin similar to the above-mentioned film-shaped member can be used. can.

Here, FIG. 1 is a photograph showing an example of the gas pipe 1 to be repaired for air leakage. FIG. 2 is a photograph showing an example of the top surface 1a of the closing flange portion of the gas pipe. FIG. 3 is a photograph showing an example of the bottom surface 1b of the closing flange portion of the gas pipe. An air leak portion 2 having a diameter of 1 mm is provided on the bottom surface 1b of the closing flange portion of the gas pipe shown in FIG.

4 and 5 are photographs showing an example of the air leak repair device of the present invention. The leak repair device 20 shown in FIGS. 4 and 5 is a handy type, 21 is a film-like member, and the surface of the film-like member 21 is subjected to a mold release treatment by a silicone coating. At the time of repair, a predetermined amount of the leaked portion repairing material of the present invention is attached to the surface of the film-like member 21 and pressed against the hole (air leaked portion) of the coating film to be used for repairing the leaked portion.
Reference numeral 22 denotes a push-in switch, and by pushing the push-in switch with a finger, ultraviolet rays are irradiated from a light source (not shown) through the film-like member 21.

According to the air leak repair device of the present invention, the air leak repair material attached to the surface of the film-like member closes the hole (air leak) of the coating film and irradiates light to repair the leak. Since the leaked part is repaired by hardening the air, even if the amount of air leaked from the leaked part is large, it is easily shorter than the method using an ultraviolet irradiation device separate from the conventional pressurizer. It can be repaired in time.

Here, an embodiment of the method for identifying a leak location and the method for repairing a leak of the present invention will be described in detail with reference to the drawings.

<First Embodiment>
FIG. 6 shows an example of the method for repairing the leaked portion of the first embodiment, and shows the state before repairing the leaked portion. It is a photograph which shows the gas pipe 1 which has the closed flange part which provided the air leakage part 2 of the diameter 1mm on the bottom surface 1b before repair.
Next, FIG. 7 shows a state in which an air leak location identifying material is applied to a portion suspected of leaking, and an air leak location identifying material is applied to the air leak location 2 on the bottom surface 1b of the closing flange portion of the gas pipe and its periphery. Is a photograph showing a state in which the coating film 3 is formed by applying the above. The air leakage location specifying material contains a white colorant, and the coating film 3 is white.
Next, FIG. 8 is a photograph showing a state in which holes are formed in the coating film due to air leakage, and a state in which holes 4 are generated in the coating film 3 due to the pressure of air leakage from the leaked portion (FIG. 8). Leakage location identification process). The hole 4 corresponds to an air leak point. Since the coating film 3 is white, the holes 4 can be easily found.
Next, FIG. 9 shows a state in which the coating film including the leaked portion is cured, and ultraviolet rays are applied to the coated film 3 in which the pores 4 are formed by using the leaked portion repair device 20 of the present invention. It is a photograph which shows the state of irradiating and curing. As a result, the holes 4 which are the specified air leakage points and the coating film 3 where the holes are formed are cured, and the holes are fixed (curing step).
Next, FIG. 10 is a photograph showing the state of the cured air leakage portion and showing the cured coating film 3a having the cured pores 4a.
Next, FIG. 11 shows a state in which the leaked portion is closed with the leaked portion repair material and the leaked portion repair material is cured, the cured hole 4a is closed with the leaked portion repair material, and the air leakage of the present invention is shown. It is a photograph which shows the state which is cured by irradiating ultraviolet rays using the part repair apparatus 20 (repair process).
Finally, FIG. 12 is a photograph showing a state in which the repair of the leaked portion is completed, and a state in which the hole is closed and the repair of the leaked portion is completed.

<Second embodiment>
In the second embodiment, the air leakage location identifying material of the present invention is applied to the repaired portion to form a coating film, a tubular member is installed at the repaired portion of the coating film, and the coating film is irradiated with ultraviolet rays. It was cured by that. After that, the tubular member is filled with the leak repair material of the present invention, a hole is formed in the tubular member by air pressure leakage, and then an on-off valve is connected to the tubular member in an open state to open and close. It is a method of repairing the leaked part by closing the valve.

-How to identify the location of air leak-
There are the following two methods for identifying the leak location, A and B.
In the method A, as shown in FIG. 13, when the air leakage location specifying material 3 of the present invention is applied to the air leakage location 2 (see FIG. 14), the coating film made of the air leakage location identifying material 3 is formed by the air pressure leakage. Since a hole is opened, the tube 5 is pressed against the hole as a tubular member with the center of the inner diameter of the tube 5 as a guide (see FIG. 15). If there is a gap after pressing the tube 5, the leak location specifying material 3 is added and molded as necessary. Then, the coating film is irradiated with ultraviolet rays to cure it, and the tube is fixed. From the above, the leaked part is specified. The tubular member is not particularly limited and may be appropriately selected depending on the intended purpose. Examples thereof include urethane tubes. The air leakage location specifying material 3 of the present invention has a thixotropy (A / B) of 21.0 or more.
It is also possible to connect the on-off valve 6 as shown in FIG. 16 directly to the air leakage point 2 with the air leakage point identification material 3 without using the tubular member. The shape and material of the on-off valve 6 are not particularly limited as long as it is an air valve, and can be appropriately selected depending on the intended purpose. Examples thereof include a ball valve, a hand valve, a solenoid valve, and a tube valve.
Even if the hole (air leakage location) of the coating film of the air leakage location identification material 3 is larger than the inner diameter or outer diameter of the tube 5, the air leakage location identification material 3 is placed in the gap after the tube is pressed. It is also possible to additionally mold and allow air to leak only from the tube, and then cure the coating film to fix the tube and identify the location of the air leak.

In method B, the air leakage location specifying material 3 is applied to the opening of the tube 5, and the air leakage location identifying material 3 is filled inside the tube and pressed against the air leakage location 2, and the air leakage is filled by the air pressure. Since a hole is formed in the location specifying material 3, the inside and outside of the tube 5 may be cured as it is to be fixed to the leaked portion 2. In method B, it may be used in combination with method A.

-How to repair leaks-
(1) As shown in FIG. 17, a hole (air leakage point 2) having a diameter of 10 mm is opened in the welded part, an internal pressure of 0.8 MPa is applied by the compressor, and gas is ejected from the air leakage point 2. It is in a state of being.
(2) As shown in FIG. 18, the leaked portion repair material 7 of the present invention is applied to the leaked portion 2 to form a coating film, and the polyurethane tube 5 (as a tubular member) is formed at the repaired portion of the coating film. An outer diameter of 6 mm, an inner diameter of 4 mm, manufactured by Nippon Pisco Co., Ltd.) is arranged, and the coating film is cured by irradiating with ultraviolet rays. The air leak repair material 7 of the present invention has a thixotropy (A / B) of 21.0 or more.
(3) As shown in FIG. 19, the on-off valve 6 (manufactured by Nippon Pisco Co., Ltd., closed valve hand valve union straight) is connected to the tube 5 in an open state.
(4) As shown in FIG. 20, the on-off valve 6 is closed to stop air leakage (see FIG. 21). With the above, the repair of the leaked part is completed.

<Use>
By using the material for identifying the leaked part of the present invention in the method for identifying the leaked part of the present invention, the leaked part can be easily specified by a simple operation of simply applying the material to the part suspected of having leaked.
By using the leaked portion repair material of the present invention in the leaked portion repair method of the present invention, it is not necessary to specify the leaked portion in advance, and even if the amount of air leaked from the leaked portion is large, it can be easily performed for a short time. Therefore, it can be suitably used for repairing communication cables such as gas pipes, gas filling devices, gas insulating devices, and optical cables.

Hereinafter, examples of the present invention will be described, but the present invention is not limited to these examples.

(Examples 1 to 15 and Comparative Examples 1 to 5)
<Preparation of air leakage location identification material>
The leak location identification material having the composition and content shown in Tables 1 to 3 was prepared. Specifically, the binder components and additives shown in Tables 1 to 3 were mixed and then stirred until the solid content was dissolved. The unit of the content in Tables 1 to 3 is parts by mass.

Next, various characteristics of each of the obtained air leakage location identification materials were evaluated as follows. The results are shown in Tables 1 to 3.

<Measurement of viscosity>
The viscosity of each leak location identification material was measured using AR-G2 manufactured by TA Instrument. Specifically, using a cone plate with a diameter of 20 mm, angle 2 °, under an environment of temperature of 25 ° C., it was measured viscosities in the range of shear rate (shear ^rate) 0.01s ^{-1 ~100s} -1. The viscosity was evaluated with a share rate of 0.1 s ^-1. The ratio (A / B) of the viscosity A at 25 ° C. when the share rate was 0.1 s ^-1 and the viscosity B at 25 ° C. when the ^{share rate was 10 s -1 was defined as the thixotropy.}

<Measurement of elastic modulus>
Each air leakage location identification material was applied with a bar coater on the release-treated polyester film so that the average thickness was 1 mm, cured with UV light U1 manufactured by JAXMAN, and used with RSAIII manufactured by TA Instrument. , Tension mode, frequency 10 Hz, heating rate 10 ° C./min. , Temperature dispersion measurement was carried out in the range of 25 ° C. to 100 ° C., and the value of elastic modulus E'at 50 ° C. after curing was determined.

<Pore forming property on the coating film>
A coating film is formed by applying a material for identifying each leak location to a leak portion having a diameter of 1 mm provided on the bottom surface 1b of the closing flange portion of the gas pipe shown in FIG. 3 with a brush so as to have a thickness of 1 mm. Based on the degree of pore opening in the coating film, the pore-forming property in the coating film was evaluated according to the following criteria.
[Evaluation criteria]
〇: A state in which the thickness of the coating film is maintained at 0.2 mm or more and a hole is opened in the air leakage part. A state in which the thickness of the cover film is held less than 0.2 mm

<Air leakage sealing property>
Leakage of the closing flange portion in a state where pressure is applied by air so that a pressure of 0.1 MPa is applied to the gas pipe having an air leakage portion having a diameter of 1 mm provided on the bottom surface 1b of the closing flange portion of the gas pipe shown in FIG. A coating film is formed by applying each air leakage location identification material to the air location with a brush so that the thickness is 1 mm, and the coating film contains holes (air leakage locations) formed by the pressure of the air leakage. The leaked portion was cured by irradiating with ultraviolet rays, the cured air leaked portion was closed with the leaked portion repair material, and the leaked portion repair material was cured by irradiating the leaked portion with ultraviolet rays to repair the leaked portion. Then, the leak state of the leaked part was evaluated for the leak sealing property according to the following criteria. In addition, Δ or more is a feasible level.
[Evaluation criteria]
〇: No air leak for 1 hour or more Δ: Air leaked for 1 minute or more and less than 1 hour ×: Air leaked in less than 1 minute (immediate air leak)

<Air leakage sealing using on-off valve>
As shown in FIGS. 17 to 21, a coating film was formed by applying each air leakage location specifying material to the repaired portion with a brush so as to have a thickness of 1 mm. A polyurethane tube 5 (outer diameter 6 mm, inner diameter 4 mm, manufactured by Nippon Pisco Co., Ltd.) was arranged at the leaked portion of the coating film, and the coating film was cured by irradiating it with ultraviolet rays. After that, the tube is filled with a material for repairing each leaked part, and a hole is formed in the tubular member by the air pressure leak. The leaked part was repaired by connecting the valve union straight) in the open state and closing the on-off valve. Then, the leak state of the leaked part was evaluated according to the following criteria. In addition, Δ or more is a feasible level.
[Evaluation criteria]
〇: No air leak for 1 hour or more Δ: Air leaked for 1 minute or more and less than 1 hour ×: Air leaked in less than 1 minute (immediate air leak)

The detailed contents of each component shown in Tables 1 to 3 are as follows.

<Polymerizable compound>
・ IBXA: Isobonyl acrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd.)
・ ISTA: Isostearyl acrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd.)
・ 4HBA: 4-Hydroxybutyl acrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd.)
・ HDDA: 1,6-Hexanediol diacrylate (manufactured by Osaka Organic Chemical Industry Co., Ltd.)
-M100: 3,4-epoxycyclohexylmethylmethacrylate (manufactured by Daicel Corporation)

<Polymerization initiator>
-IRG1173: Photoradical generator (manufactured by IGM Resins BV)
-IRG819: Photoradical generator (manufactured by IGM Resins BV)

<Photoacid generator>
-PI2074: Photoacid generator (manufactured by Rodi Japan)

<Sensitizer>
-DETX-S: Sensitizer (manufactured by Nippon Kayaku Co., Ltd.)

<Additives>
・ P4: Talc (manufactured by Japan Talc Co., Ltd.)
・ PP5WJ: Polypropylene (manufactured by Seishin Enterprise Co., Ltd.)
・ AS200: Nanosilica (manufactured by Nippon Aerozil Co., Ltd.)
-GS-64 (LV): Silica (manufactured by Ryumori Co., Ltd.)
Septon 4033: SEEPS (hydrogenated styrene-based thermoplastic elastomer, manufactured by Kuraray Co., Ltd.)

1 Gas piping 1a Top surface of gas piping closing flange 1b Bottom surface of gas piping closing flange 2 Leakage point 3 Leakage point identification material 4 Hole in coating film 5 Tubular member (tube)
6 On-off valve 7 Leakage point repair material 20 Leakage point repair device

Claims (13)

It is an air leak location identification material that is applied to a location suspected of leak and is used to identify the leak location.
Assuming that the viscosity at 25 ° C. at a share rate of 0.1 s ^-1 is A (Pa · s) and the viscosity at 25 ° C. at a share rate of 10 s ^-1 is B (Pa · s), the following equation A / B ≧ 21.0, is satisfied,
A material for identifying an air leak location, characterized in that the elastic modulus E'at 50 ° C. after curing is 10 MPa or more. The air leakage location identifying material according to claim 1, wherein the viscosity A at 25 ° C. at a share rate of 0.1 s ^{-1 is 500 Pa · s or more.} The air leakage location identifying material according to any one of claims 1 to 2, which comprises a curable resin composition. The air leakage location identifying material according to claim 3, wherein the curable resin composition contains a polymerizable compound and / or a polymerization initiator. The air leak location identifying material according to claim 4, further containing a colorant. The air leakage location identifying material according to any one of claims 1 to 5, which is cured by irradiation with light having a wavelength of 420 nm or less. A material for repairing an air leak portion, which comprises using the material for identifying an air leak location according to any one of claims 1 to 6 for repairing an air leak location. A coating film made of the air leakage location specifying material according to any one of claims 1 to 6 is formed at a location suspected of leaking, and the portion of the hole generated by the air leakage in the coating film is leaked. A method for identifying an air leak location, which comprises a step of identifying an air leak location to be specified as a location. A curing step of curing the coating film containing the leaked portion specified by the leaked portion specifying method according to claim 8, and a curing step of curing the coating film including the leaked portion.
A repair step of closing the leaked portion cured by the leaked portion repair material according to claim 7 and curing the leaked portion repair material.
A method of repairing an air leak, which is characterized by including. A step of curing the coating film in a state where a tubular member is arranged at the leaked portion of the coating film including the leaked portion specified by the method for identifying the leaked portion according to claim 8.
A step of filling the tubular member with the leak repair material according to claim 7, connecting the on-off valve to the tubular member opened by air pressure in an open state, and closing the on-off valve.
A method of repairing an air leak, which is characterized by including. It has a light source and a film-like member or a tape-like member that transmits ultraviolet rays to the irradiation surface of the light source.
An air leak repair device according to claim 7, wherein the air leak repair material according to claim 7 can be mounted on the film-like member and the tape-like member. The air leak repair device according to claim 11, wherein the surfaces of the film-like member and the tape-like member are mold-released. A method for repairing an air leak portion, which comprises using the air leak location repair device according to any one of claims 11 to 12.

Images