JP5252395B2 - Oil leakage prevention method for oil-filled equipment - Google Patents

Description

  The present invention relates to an oil leakage stopping method for oil-filled equipment.

In a conventional repair method for the purpose of preventing oil leakage, a method using an epoxy resin has been studied. For example, Patent Document 1 discloses a sealing agent containing a liquid-modified epoxy resin as a sealing agent used for preventing oil leakage. Patent Document 2 discloses a method for preventing oil leakage at a portion fastened by a bolt and a nut of a flange portion using two kinds of first sealing agent and second sealing agent containing a polysulfide liquid modified epoxy resin. Is disclosed. Patent Document 3 discloses an oil leakage prevention method using an oil leakage location repairing sealant composed of a liquid polysulfide resin and a curing agent and an epoxy resin.
Japanese Examined Patent Publication No. 7-108970 JP-A-8-111318 JP 2003-306662 A

  In the conventional method of stopping oil leakage, as described above, all of Patent Documents 1 to 3 stop oil leakage with an epoxy resin. Such a method using an epoxy resin has a long curing time in order to prevent oil leakage, there is no curing in a few seconds, and the curing time is 5 minutes even if the composition is adjusted so as to cure quickly. This is necessary. In oil-filled equipment, oil continues to be pushed out from the oil-spilled part due to internal pressure. Therefore, until the epoxy resin hardens, oil comes out from the oil-filled part due to the internal pressure, and continues to push to make a pool (FIG. 1). For this reason, when the amount of oil flowing out from the oil leakage portion is large, the uncured epoxy resin portion swells to form an oil pool, or the epoxy resin is pushed through to leak oil. Over time, such a puddle travels along the adhesive interface of the oil-filled equipment and causes further oil leakage (FIG. 1). Moreover, the coating obtained by the construction method of Patent Documents 1 and 2 that reinforces an oil leakage portion with an epoxy resin has a problem that physical strength is fragile. In addition, Patent Document 3 with improved impact resistance can be cited as a study of this problem, but the method disclosed in Patent Document 3 uses a room temperature-curing epoxy resin that is soft even at room temperature, In the case of such an epoxy resin, in an environment where the temperature of the oil is 80 ° C., it becomes too soft and heat resistance is difficult, and it has not been possible to reliably prevent leakage.

  The present invention has been made in view of the above problems, and the oil leakage prevention method for oil-filled equipment according to the present invention comprises a grease-like adhesive composition containing at least an α-cyanoacrylate resin and fine powder at the oil leakage location. A first coating step to be applied, a first curing step in which an amine-containing curing agent is sprayed on the applied grease-like adhesive composition at the same time as the first coating step, and instantly cured to stop the oil, and further α-cyano A second application step of applying a grease-like adhesive composition containing at least an acrylate resin and a fine powder; a reinforcing step of reinforcing the grease-like adhesive composition applied in the second application step with a nonwoven fabric; and a second application step Including a second curing step of spraying the amine-containing curing agent on the grease-like adhesive composition applied in step 3 and a third coating step of applying a curable resin on the nonwoven fabric. Before the cured adhesive composition is cured, and the curable resin is at least one selected from the group consisting of vinyl ester resins, unsaturated polyester resins, acrylic resins and epoxy resins. It is a resin containing.

  According to the oil leakage prevention method for oil-filled equipment of the present invention, since α-cyanoacrylate containing ultrafine silica is used, the oil leakage location can be efficiently blocked. Further, since the amine-containing curing agent is used, the sealing agent can be instantly cured, and oil leakage can be completed. Since the α-cyanoacrylate containing the ultrafine silica is a grease-like material, it is possible to form a thick film. With this thickness, moisture in the air does not affect the inside of the grease-like material, and Since the curing is delayed, it is possible to apply the nonwoven fabric. Moreover, this pasted nonwoven fabric can be instantly cured (instantaneous) together with the grease-like film by the amine-containing curing agent. It becomes possible to perform oil leakage prevention excellent in impact resistance, weather resistance and the like as the entire coating film formed by each process.

  Hereinafter, the present invention will be described in more detail. In addition, in the following description, although demonstrated using drawing, what attached | subjected the same referential mark in drawing of this application has shown the same part or an equivalent part.

<First application process>
The oil leakage prevention method for oil-filled equipment of the present invention includes a first application step of applying a grease-like adhesive composition containing at least an α-cyanoacrylate resin and fine powder to the oil leakage location. In FIG. 2, the schematic diagram of the oil stop location which apply | coated the adhesive composition to the oil leak location is shown. In a 1st application | coating process, as FIG. 2 shows, the grease-like adhesive composition 4 is apply | coated to the broken location of the oil-filled apparatus 2 with which the oil 1 was enclosed. By applying a grease-like adhesive composition containing at least an α-cyanoacrylate resin and fine powder in this first coating step, the combination with the curing step described later, the curing time is instantaneous, so at the oil leakage point. Can be sealed. Therefore, it becomes possible to eliminate the generation of oil pools as in the construction method using a conventional epoxy resin as the first coating process, and as a result, it is possible to completely prevent oil from flowing out from the oil leakage part over a long period of time. Can do.

  The grease-like adhesive composition (hereinafter sometimes referred to as the grease-like α-cyanoacrylate) containing at least the α-cyanoacrylate resin and fine powder is preferably one-pack type, and the alkyl α-cyanoacrylate. A grease (gel) is used in which a fine powder is added to an instant adhesive mainly composed of succinic acid to give thixotropic properties. In order to prevent oil leakage from oil-filled equipment, it is necessary to increase the thickness of the coating applied in the first application step. Such a grease-like adhesive composition is a fine powder such as ultrafine silica. Is mixed to give a thixotropic property, so there is no problem of dripping in application to a vertical surface or the like, and a desired thick film can be formed. The said grease-like adhesive composition shows favorable adhesiveness also to the oil surface of the oil-filled equipment as in the present invention.

  In the first application step, the grease-like adhesive composition can be applied using a brush or the like, and may be applied to a region that closes the oil leakage portion. Further, the thickness of the grease-like adhesive composition to be applied is not particularly limited, but since it is in the form of a grease in which a fine powder is mixed with the α-cyanoacrylate resin as described above, dripping does not occur and the vertical surface is Even if it exists, it is also possible to apply | coat to the thickness of 2 mm or more as well as a thin film.

<First curing step>
Simultaneously with the first coating step, a first curing step is performed in which the applied grease-like adhesive composition is instantly cured by spraying an amine-containing curing agent onto the surface by spraying or the like to stop oil. By providing the said grease-like adhesive composition with this hardening process, the grease-like adhesive composition can be instantaneously cured, and oil leakage can be reliably prevented. Moreover, an oil sump is not formed unlike the case of the epoxy resin of FIG. As the amine-containing curing agent, either an aliphatic amine or an aromatic amine can be used. The amine-containing curing agent, which is encapsulated in a spray container 5 as shown in FIG. 3, is obtained by aerosolizing the cyclopentane solution of the amine-containing curing agent with dimethyl ether (DME) or liquefied petroleum gas (LPG). Spray on the entire surface of the adhesive composition 4.

  By such an operation, the curing reaction is promoted from the surface portion of the grease-like adhesive composition 4 sprayed with the amine-containing curing agent, and then the inside (interface between the grease-like adhesive composition 4 and the oil-filled container 2). The curing reaction proceeds in a chained manner. Although depending on the application region, the grease-like adhesive composition can be cured in about 30 seconds, for example. The content of the amine-containing curing agent in the cyclopentane solution may be about 5% by weight.

  The first coating step and the curing step may be performed once, but it is preferable to alternately repeat the first coating step and the curing step until oil leakage can be completely prevented by visual observation. In this case, it is preferable to set the curing step as a final final step, and for example, leave it for 30 minutes or more to confirm that there is no oil leakage, and then perform the next step.

<Second application process>
The oil leakage prevention method of the present invention includes a second application step of applying a grease-like adhesive composition containing at least an α-cyanoacrylate resin and fine powder after the curing step. As the grease-like adhesive composition applied in the second application step, the grease-like adhesive composition in the first application step can be used. Also, the application form can be the same as in the first application step.

<Reinforcing process>
The present invention provides a grease-like adhesive composition applied in the second application step after the grease-like adhesive composition is applied in the second application step and before the grease-like adhesive composition is cured. A reinforcing step of reinforcing the substrate with a nonwoven fabric. By reinforcing with the nonwoven fabric before the grease-like adhesive composition is cured, the surface area can be increased by the nonwoven fabric, and the interaction between the grease-like adhesive composition and the nonwoven fabric can be enhanced. As a result, it is effective in that the adhesion between the grease-like adhesive composition and the nonwoven fabric can be improved, and the impact resistance (brittleness) of the cured grease-like adhesive composition can be improved as compared with the conventional one. is there. As a nonwoven fabric, what is comprised by cotton, vinylon, and saturated polyester can be illustrated, for example, It is not limited to these. Further, the thickness and basis weight of the nonwoven fabric are not particularly limited, and any known one can be used.

  Here, the generally used low-viscosity α-cyanoacrylate resin reacts with moisture in the air and cures quickly in a few seconds, so that it is difficult to reinforce with a non-woven fabric (attach non-woven fabric) as described above. On the other hand, in the second coating step of the present invention, since the above-mentioned adhesive composition in the form of grease is used, the coating film can be formed with a thickness, and moisture in the air can be instantaneously applied to the inside of the coating film. Does not reach and cure time is extended. As a result, it is possible to perform an operation of applying the nonwoven fabric slowly as compared with the conventional case, and the oil leakage portion is reliably reinforced. After the non-woven fabric is pasted, the amine diluted solution as a curing agent is sprayed and cured instantaneously as described above (FIG. 3).

  The second application step and the reinforcing step are at least 30 cm from the central portion of the oil leakage location (shown as filled in FIG. 4), as illustrated in the schematic diagram illustrating the construction area of the oil leakage prevention method in FIG. It is preferable to carry out such that the grease-like adhesive composition 4 and the nonwoven fabric 6 are provided in the region up to. By applying the second coating step and the reinforcing step to such a region, the grease-like adhesive composition can be strengthened, and the impact resistance can be further improved. The construction area may be performed so that the entire width of the construction target is covered with the nonwoven fabric 7 as shown in the schematic diagram showing the construction area of the oil leakage prevention portion and the oil leakage prevention construction method in FIG. Moreover, the construction method of the present invention is also effective in preventing oil leakage in a steel plate as shown in FIG. 5 and piping as shown in FIG. FIG. 5 and FIG. 6 are schematic views showing the oil leakage prevention portion and the construction area of the oil leakage prevention construction method in steel plates and pipes, respectively, and the grease-like adhesive composition 4 provided in the first application step The state reinforced with the grease-like adhesive composition provided in 2 application | coating processes and the nonwoven fabric 7 provided in a reinforcement process is shown. In addition, the location represented by the solid line in FIG. 5 and FIG. 6 is an oil leakage location, and the grease-like adhesive composition 4 actually provided in the first application step is a non-woven fabric provided in the reinforcement step. In order to clearly show the region of the grease-like adhesive composition 4 provided in the first application step, the grease-like adhesive composition 4 and the nonwoven fabric 7 are used for convenience. Indicates.

  After the reinforcing step, a second curing step for curing the grease-like adhesive composition applied in the second application step is performed. As described above, this curing is performed using an amine-containing curing agent in the same process as the first curing process in terms of construction efficiency.

<Third application process>
The oil leakage stopping method of the present invention includes a third application step of applying a curable resin on the nonwoven fabric. This curable resin forms a film provided for reinforcement. As said curable resin, resin containing at least 1 sort (s) selected from the group which consists of vinyl ester resin, unsaturated polyester resin, an acrylic resin, and an epoxy resin is used. The use of these resins is preferable in that heat resistance can be imparted.

  In the third coating step, the curable resin is used by mixing a curing agent and a curing catalyst. As the curing catalyst, a known one can be used as a curing agent for the curable resin, and an organic peroxide such as methyl ethyl ketone peroxide is used from the viewpoint of rapid curing. Cobalt naphthenate or the like is used as a curing accelerator. Metal soaps, aromatic amines, and the like.

  In the present invention, since the non-woven fabric film is provided as described above, for example, even when an epoxy resin having a glass transition point of 56 ° C. or lower is used, the adhesion and impact resistance ( It is effective in improving brittleness and can provide an oil leakage prevention method that can withstand a temperature environment of 80 ° C. Moreover, since the hardened | cured material of the glycate cyanoacrylate formed in the said corresponding | compatible process, the hardened | cured material of unsaturated polyester resin, and an acrylic resin can select what has heat resistance of 100 degreeC or more, the improvement effect of heat resistance is large. .

<Protective coat formation process>
In the present invention, it is preferable to provide a protective coat on the curable resin applied in the third application step. The protective coat is provided in order to suppress the occurrence of cracks due to external impact and contraction of components such as a curable resin.

<Topcoat formation process>
Moreover, the topcoat formation process which provides a topcoat further on the said protective coat can be included. The top coat is provided in order to prevent deterioration of the protective coat such as discoloration or to provide weather resistance, and a film made of a known one-component solvent-based acrylic paint may be formed.

  By the steps as described above, for example, as shown in FIG. 8, a coating made of the grease-like adhesive composition 4, the nonwoven fabric 6, the curable resin 9, the urethane resin 10, and the acrylic paint 11 is sequentially formed from the surface of the oil-filled device 2. Will be formed.

  The oil leakage prevention method of the present invention enables oil leakage prevention on a flat surface, and can also stop oil leakage by the above steps even if the oil leakage location and its periphery are complex shapes. The oil-filled equipment targeted by the method of the present invention includes, but is not limited to, pipes filled with lubricating oil or insulating oil, equipment filled with cooling insulating oil such as a transformer, etc. It can be widely applied to repair of oil leakage points.

  EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated in detail, this invention is not limited to these.

<Oil leakage prevention method>
A notch was made in one place of a packing 17 having a diameter of 15 mm and a thickness of 4 mm sandwiched between flanges 18 in an oil-filled device as shown in FIG. Samples 1 to 3 as shown in the following Table 1 and FIGS. 10 (a) to (c) are used so as to cover the packing 17, the flange 18, the bolt 19, the nut 20, and the washer 21 including the oil leakage portion. Oil leakage was stopped. Sample 1 corresponds to FIG. 10A, sample 2 corresponds to FIG. 10B, and sample 3 corresponds to FIG. 10C. FIG. 10 (a) is based on a conventional oil leakage prevention method, in which the oil leakage portion is closed with the epoxy resin 3 and then reinforced with the epoxy resin 23. FIG. 10 (b) is based on the oil leakage prevention method of the present invention. In order from the surface of the oil-filled device 2, the grease-like adhesive composition 4, the nonwoven fabric 6, and the curable resin 9 are epoxy resin, urethane resin 10, It has the structure in which the film which consists of acrylic paints 11 was formed. 10C has the same configuration as FIG. 10B except that the epoxy resin is replaced with the vinyl ester resin 24 as the curable resin 9. FIGS. 10A to 10B are schematic views for showing the order of the respective steps and the coating film to be formed, and the formation region of the actual coating film and the like is the same as that shown in FIG.

  Samples 2 and 3 were constructed as follows. First, as the first application step, the grease-like adhesive composition having the physical properties shown in Table 2 is covered so as to cover the packing 17, the flange 18, the bolt 19, the nut 20, and the washer 21 including the oil leakage portion as described above. It was applied at a thickness of 2 mm to 3 mm. Immediately after the application, a cyclohexane solution containing 5% by weight of an aromatic amine was placed in the spray container on the surface of the applied grease-like adhesive composition, and aerosolized with dimethyl ether (DME) was sprayed (sprayed). The spray was sprayed for several seconds and then left for 30 minutes (curing step). When the first application step and the curing step were repeated twice, each was left for 30 minutes, and it was confirmed that there was no oil leakage. In some cases, the curing may actually take less than 30 minutes, but for the sake of comparison, it was unified to 30 minutes.

  Next, the same grease-like α-cyanoacrylate (grease-like adhesive composition) as used in the first application step is applied to the region where the grease-like composition is applied in the first application step to 2 mm to 3 mm. It was applied with a thickness of. Next, a non-woven fabric made of saturated polyester fiber (manufactured by DuPont) is pasted so as to cover the region subjected to the second application step, and a spray containing the same amine-containing cured product as above is sprayed over the entire surface for several seconds to be cured. I let you.

  Next, a reinforcing resin (sample number 2; epoxy resin, sample number 3; vinyl ester resin) to which 5 to 10% by weight of ultrafine silica as a sag-preventing agent and methyl ethyl ketone peroxide as a curing catalyst were added in advance onto the nonwoven fabric. 2 mm was applied, and then allowed to stand for 60 minutes to cure.

  Thereafter, 2 mm of a fast-curing two-component urethane resin shown in Table 2 was applied and cured on the cured reinforcing resin, and then a one-component solvent-based acrylic paint was applied.

Table 2 shows the physical properties of the raw materials used in Samples 1 to 3. Table 1 shows the results of the oil leakage resistance test of Samples 1 to 3. The oil leakage resistance test was performed using a pressure vessel specimen shown in FIG. The pressure vessel specimen in FIG. 9 has a structure in which the bottom surface of the pressure vessel main body 12 is fixed to a flange 18 via a packing 17 with bolts 19, nuts 20 and washers 21, and includes a pressure regulating valve 15, a pressure gauge 13, and an oil filler port. 14 and the oil discharge port 16, and oil is injected from the oil supply port 14, and then the valves 22 are closed to adjust the pressure inside the pressure vessel body 12. Heat cycle test 1 (indicated in Table 1 as heat cycle test 1 (80 ° C.)) and heat cycle test whose maximum temperature is 100 ° C. with an introduction pressure of 0.5 MPa as an initial state 2 (indicated as heat cycle test 2 (100 ° C.) in Table 1), the internal pressure of the pressure vessel specimen after each test was measured, and the results are shown in Table 1. Each heat cycle test was performed under the following conditions.
・ Heat cycle test 1
Hold at 20 ° C for 0.5 hour → Hold at -10 ° C for 3 hours → Hold at 20 ° C for 0.5 hour → Hold at 80 ° C for 3 hours → Hold at 20 ° C for 0.5 hour ・ Heat cycle test 2
Hold at 20 ° C for 0.5 hour → Hold at -10 ° C for 3 hours → Hold at 20 ° C for 0.5 hour → Hold at 100 ° C for 3 hours → Hold at 20 ° C for 0.5 hour

  In Table 1 above, combinations of resins used up to the second coating step of each sample are shown. Sample No. 1 is based on the conventional construction method of other companies, and since the first and second coating steps are performed with epoxy resin, oil leakage cannot be stopped instantaneously and is not reinforced with nonwoven fabric. Was partially broken, and oil was leaked from the side surfaces of the flange 18 and the packing 17, and the pressure became 0 MPa during two cycles at 80 ° C. and one cycle at 100 ° C. Sample No. 2 was the method of the present invention, and the pressure became 0.4 MPa in 3 cycles at 80 ° C., but no oil leakage was observed. It can be seen that even an epoxy resin having inferior heat resistance has a sufficient reinforcing effect by the non-woven fabric up to 80 ° C. At 100 ° C., the heat resistance of the epoxy resin was insufficient, so the pressure became 0 during two cycles and oil leaked. Sample No. 3 was the method of the present invention, and no abnormality was observed in any of the heat cycle tests at 80 ° C. and 100 ° C. The pressure is a value measured when the temperature reaches 80 ° C. or 100 ° C. shown in Table 1.

  The pot life in Table 2 above is a value at 25 ° C., and the coating film drying time indicates the time until the coating film made of each resin is completely dried. In addition, the said pot life is time when 100g which mixed the hardening | curing agent with each resin reaches | attains 70% of the heat generation start time. The time for spraying the amine-containing curing agent including the amine-based curing agent (indicated as accelerator spray in Table 2) indicates the time from spraying the amine-containing curing agent to complete drying. Tensile shear is a value of iron / iron tensile shear force according to JIS standard, K6850, bending strength is a value according to JIS standard, K7171, compressive strength is a value according to JIS standard, K7181, tensile strength is a value according to JIS standard, It is a value according to K7113, and Shore D hardness is a value according to JIS standard, K7215.

  As is clear from the results in Table 1, the oil leakage prevention method of the present invention can completely prevent oil leakage even at a high temperature as compared with the conventional method.

<Effects of non-woven fabric>
In order to verify the effect of the nonwoven fabric in the method of the present invention, the following test was conducted.

(Production of specimen)
(Specimen A)
The adhesion surface of the mild steel plates (a pair of two sheets) shown in FIG. 11A was polished with sandpaper (# 320), and oils and fats were removed with acetone (referred to as surface treatment). The grease-like cyanoacrylate 4 used for the sample is applied 1 mm, and the amine-containing curing agent is sprayed and cured. On top of that, the grease-like cyanoacrylate 4 is applied again at a thickness of 1 mm and cured, and a reinforcing epoxy resin 26 is applied at a thickness of 1 mm. The sample A was bonded and cured as in (2).
(Specimen B)
The same surface treatment as that of the specimen A was performed on the bonding surface of the mild steel plate (two pairs) shown in FIG. The grease-like cyanoacrylate 4 used for the sample is applied 1 mm, and the amine-containing curing agent is sprayed and cured. On top of that, the grease-like cyanoacrylate 4 was again applied with a thickness of 1 mm, and the non-woven fabric 6 was layered on the upper surface in an uncured state, and cured by spraying a curing agent. Next, a reinforcing epoxy resin 26 is applied with a thickness of 1 mm, and two uncoated steel sheets are bonded and cured as shown in FIG.

In FIGS. 11A and 11B, L ₁ = 100 mm and L ₂ = 12.5 mm.

(Test method)
In order to verify the effect of the nonwoven fabric using these specimens A and B, a test was carried out in accordance with a tensile shear bond strength test method (JIS K 6850). The specimen was cured for 7 days at room temperature. The test results are shown in Table 3.

As shown in Table 3, when the test temperature is 22 ° C., the tensile shear bond strength is 14 N / mm ² for the specimen B with the nonwoven fabric, and 11 N / mm ² for the specimen A without the nonwoven fabric, The improvement of the adhesive strength due to the presence of the nonwoven fabric was confirmed. When the test temperature is 80 ° C., the tensile shear bond strength is 2 N / mm ² for the specimen A without the nonwoven fabric, while the specimen B with the nonwoven fabric is 10 N / mm ² , and the presence of the nonwoven fabric. It can be seen that the effect of improving the adhesive strength is large.

  In addition, regarding the breaking condition, at 80 ° C., specimen A is a cohesive fracture of 95% of the epoxy resin, whereas specimen B has an interface fracture between the epoxy resin and α-cyanoacrylate of 100%. .

  From the above results, it can be said that the tensile shear bond strength can be remarkably improved by including a reinforcing step with a nonwoven fabric in the process of the present invention.

  Although the embodiments and examples of the present invention have been described as described above, it is also planned from the beginning to appropriately combine the configurations of the above-described embodiments and examples.

  It should be understood that the embodiments and examples disclosed herein are illustrative and non-restrictive in every respect. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The oil leakage prevention method for oil-filled equipment according to the present invention is effective for repairing oil leakage in piping such as lubricating oil and insulating oil, and has great effectiveness for repairing oil leakage such as cooling insulating oil for transformers and the like.

It is the schematic which shows the oil stop location by the conventional oil leak prevention construction method. It is the schematic which shows the oil stop location by the oil leak prevention construction method of this invention. It is the schematic which shows an example of the hardening method by an amine containing hardening | curing agent in the oil leak prevention construction method of this invention. It is the schematic which shows the construction area of an oil leak prevention construction method. It is the schematic which shows the construction area of an oil leakage prevention part and an oil leakage prevention construction method. It is the schematic which shows the construction area of the oil leak prevention part in piping, and an oil leak prevention construction method. It is the schematic which shows an example of the oil leak prevention construction method of this invention with respect to a vertical surface. It is the schematic which shows an example of the oil leak prevention construction method of this invention with respect to a horizontal surface. It is the schematic which shows the pressure vessel test body used for the leak-proof oil test. (A) It is the schematic which shows the oil leak prevention construction method by the sample 1, (b) It is the schematic diagram which shows the oil leak prevention construction method by the sample 2, (c) It is the schematic diagram which shows the oil leak prevention construction method by the sample 3 . (A) It is the schematic which shows the oil leak prevention construction method which does not contain a nonwoven fabric, (b) It is the schematic diagram which shows the oil leak prevention construction method containing a nonwoven fabric.

Explanation of symbols

  1 oil, 2 oil-filled equipment, 3,23 epoxy resin, 4 grease-like adhesive composition, 5 spray container, 6,7 non-woven fabric, 8 piping, 9 curable resin, 10 urethane resin, 11 acrylic paint, 12 pressure vessel Main body, 13 Pressure gauge, 14 Oil supply port, 15 Pressure adjustment valve, 16 Oil discharge port, 17 Packing, 18 Flange, 19 Bolt, 20 Nut, 21 Washer, 22 Valve, 24 Vinyl ester resin.

Claims (1)

A first application step of applying a grease-like adhesive composition containing at least an α-cyanoacrylate resin and a fine powder to an oil leakage location;
Simultaneously with the first application step, a first curing step in which an amine-containing curing agent is sprayed on the applied grease-like adhesive composition, instantly cured and oiled,
Furthermore, the 2nd application | coating process which apply | coats the grease-like adhesive composition containing an alpha-cyanoacrylate resin and a fine powder at least,
A reinforcing step of reinforcing the grease-like adhesive composition applied in the second application step with a nonwoven fabric;
A second curing step of spraying an amine-containing curing agent on the grease-like adhesive composition applied in the second coating step;
And a third application step of applying a curable resin on the nonwoven fabric,
The reinforcing step is performed before the grease-like adhesive composition applied in the second application step is cured,
The oil-curing device oil leakage prevention method, wherein the curable resin is a resin including at least one selected from the group consisting of vinyl ester resins, unsaturated polyester resins, acrylic resins, and epoxy resins.

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