Epoxy resin adhesive for rapid leaking stoppage of oil storage tank and use method of epoxy resin adhesive

Abstract

The invention provides an epoxy resin adhesive for rapid leaking stoppage of an oil storage tank and a use method of the epoxy resin adhesive. The adhesive comprises an epoxy component, a curing component, a compatilizer and a curing accelerator, the epoxy component comprises epoxy resin and a reactive diluent; the curing component comprises polyether polyol acrylate and an amine curing agent; the high-temperature-resistant epoxy resin adhesive is prepared from the following components in parts by mass: 15 to 25 parts of epoxy resin, 2 to 12 parts of reactive diluent, 3 to 15 parts of polyether polyol acrylate, 2 to 10 parts of amine curing agent, 1 to 3 parts of compatilizer and 0.5 to 1.0 part of curing accelerator. The adhesive is simple and feasible in preparation method, low in preparation cost, good in adhesive property, relatively good in compatibility with petroleum, good in stability, strong in weather resistance and convenient to use, can realize quick leakage stoppage of the oil storage tank, improves the production efficiency, and effectively saves manpower, material resources and financial resources.

Description

Technical Field

[0001] The present invention belongs to the technical field of rapid leak plugging of oil storage tanks, and relates to an epoxy resin adhesive for rapid leak plugging of oil storage tanks and a method for using the same. Background Art

[0002] As one of the most widely used storage devices in the petroleum industry, the importance and status of oil storage tanks cannot be ignored. The application of oil storage tanks also makes their safety a content worthy of in-depth study. Long-term use of oil storage tanks can cause leakage due to corrosion and aging, which not only brings inestimable accident hazards to people's life safety, property safety, ecological environment, etc., but also causes losses and waste of crude oil. Therefore, it has extremely important practical significance to conduct real-time or regular monitoring, timely detect the leakage location, and quickly plug the parts of the oil storage tank that leak due to aging and corrosion.

[0003] In the prior art, the current repair method is to drain all the oil in the oil storage tank and then carry out a major overhaul, which not only affects the production schedule but also costs a lot of manpower, material resources and time. Therefore, it is crucial to find a method for rapid leak plugging of oil storage tanks. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides an epoxy resin adhesive for rapid leak plugging of oil storage tanks and a method for using the same, so as to solve the technical problems that the repair process is complex and time-consuming when repairing a leaking oil storage tank in the prior art.

[0005] The present invention is realized through the following technical solutions:

[0006] An epoxy resin adhesive for rapid leak plugging of oil storage tanks, comprising an epoxy component, a curing component, a compatibilizer and a curing accelerator;

[0007] The epoxy component comprises an epoxy resin and an active diluent; the curing component comprises a polyether polyol acrylate and an amine curing agent;

[0008] By mass, the epoxy resin is 15-25 parts, the active diluent is 2-12 parts, the polyether polyol acrylate is 3-15 parts, the amine curing agent is 2-10 parts, the compatibilizer is 1-3 parts, and the curing accelerator is 0.5-1.0 part.

[0009] Preferably, the preparation process of the curing component is: according to the ratio, mix the polyether polyol acrylate and the amine curing agent at 0°C, and react for 0.5-1 h to obtain the curing component.

[0010] Preferably, the preparation process of the compatibilizer is:

[0011] S1: Add phthalic anhydride to n-butanol and stir for reaction;

[0012] S2: Add toluene to the reaction product of step S1, stir until evenly dispersed, then add ethylene glycol and p-toluenesulfonic acid, and carry out a reflux reaction to obtain the compatibilizer.

[0013] Preferably, the reaction temperature of step S1 is 90 - 120 °C, and the reaction time is 1 - 2 h.

[0014] Preferably, the molar ratio of phthalic anhydride, n-butanol and ethylene glycol is 1:1:1,

[0015] Preferably, the addition amount of p-toluenesulfonic acid is 0.5% - 2% of the total mass of phthalic anhydride, n-butanol and ethylene glycol.

[0016] Preferably, the temperature of step S2 is 110 - 115 °C.

[0017] Preferably, monitor the acid value of the reaction system in step S2. When the acid value of the reaction system is less than 1 KOH / (mg / g), the reaction ends to obtain the compatibilizer.

[0018] Preferably, after the reaction ends, it also includes removing toluene from the product by vacuum distillation.

[0019] The above-mentioned method for using an epoxy resin adhesive for quickly plugging oil storage tanks: coat the adhesive on the part to be bonded, press it tightly, and cure it. During the curing process, the curing time is 8 - 24 h.

[0020] Compared with the prior art, the present invention has the following beneficial technical effects:

[0021] The present invention discloses an epoxy resin adhesive for quickly plugging leaks in oil storage tanks, which includes an epoxy component, a curing component, a compatibilizer, and a curing accelerator; the epoxy component includes an epoxy resin and an active diluent; the curing component includes a polyether polyol acrylate and an amine curing agent; in addition, by mass, the epoxy resin is 15-25 parts, the active diluent is 2-12 parts, the polyether polyol acrylate is 3-15 parts, the amine curing agent is 2-10 parts, the compatibilizer is 1-3 parts, and the curing accelerator is 0.5-1.0 part. The preparation method of this adhesive is simple and easy to implement, and the preparation cost is low. The prepared solvent-free two-component adhesive, which includes an epoxy component and a curing component, has good bonding performance. At the same time, due to the addition of a compatibilizer, it has good compatibility with petroleum, can meet the bonding effect, ensure that the adhesive can adhere well to the oil-contaminated tank body, and does not contain harmful volatile substances, can meet the requirements of environmental protection and non-toxicity, has good stability, strong weather resistance, is convenient to use, can achieve quick plugging of oil storage tanks, improves production efficiency, and effectively saves manpower, material resources and financial resources.

[0022] Further, the preparation process of the curing component is as follows: according to the ratio, polyether polyol acrylate and amine curing agent are mixed at 0°C and reacted for 0.5-1 h to obtain the curing component. Amine curing agents generally have pungent odors. Modification with polyfunctional polyether polyol acrylate can reduce or even eliminate their odors, and at the same time, it can also make the cured film have a certain toughness. This reaction process realizes the modification of amine curing agents.

[0023] Further, the reaction temperature in step S1 is 90-120°C, and the reaction time is 1-2 h, which can make phthalic anhydride completely ring-open and react with n-butanol during the reaction of phthalic anhydride and n-butanol.

[0024] Further, the molar ratio of phthalic anhydride, n-butanol, and ethylene glycol is 1:1:1, which can effectively control the impurities in the product and ensure the purity of the product.

[0025] Further, the addition amount of p-toluenesulfonic acid is 0.5%-2% of the total mass of phthalic anhydride, n-butanol, and ethylene glycol, which can effectively realize the esterification and dehydration in the reaction process and catalyze the reaction process.

[0026] Further, the temperature in step S2 is 110-115°C, which is higher than the boiling point of toluene, and can effectively make the reaction product dissolve in gaseous toluene and separate from the reactants.

[0027] Further, in step S2, the acid value of the reaction system is monitored. When the acid value of the reaction system is less than 1 KOH / (mg / g), the reaction ends, and the compatibilizer is prepared. Since p-toluenesulfonic acid is added as a catalyst to the system, after the reaction of the reactants ends, the main component in the system is p-toluenesulfonic acid. By monitoring the acid value, the end point of the reaction can be accurately judged, and the impurities in the product can be effectively controlled.

[0028] Further, after the reaction ends, it also includes removing toluene in the product by vacuum distillation, removing toluene in the product in a simple and effective manner, and effectively ensuring the purity of the product.

[0029] In addition, the present invention also discloses a method for using the above solvent-free epoxy resin adhesive for quickly plugging oil storage tanks. The adhesive is directly coated on the part to be bonded, pressed tightly, and then cured. During the curing process, the curing time is 8 to 24 hours. It is convenient to use, effectively simplifies the repair process, improves the work efficiency, and effectively ensures the curing of the epoxy resin adhesive. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0031] Figure 1 Shear strength of the adhesive prepared in Example 5 of the present invention after being coated and aged at different temperatures for 30 days. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] To enable those skilled in the art to understand the features and effects of the present invention, the following will generally explain and define the terms and expressions mentioned in the specification and claims. Unless otherwise specified, all technical and scientific terms used herein shall have the ordinary meaning understood by those skilled in the art for the present invention. When there are conflicting situations, the definition in this specification shall prevail.

[0033] The theories or mechanisms described and disclosed herein, whether correct or incorrect, shall not limit the scope of the present invention in any way, that is, the content of the present invention can be implemented without being limited by any specific theory or mechanism.

[0034] In this article, all features defined in the form of numerical ranges or percentage ranges, such as numerical values, quantities, contents, and concentrations, are only for the sake of brevity and convenience. Accordingly, the description of numerical ranges or percentage ranges should be regarded as having covered and specifically disclosed all possible sub-ranges and individual numerical values (including integers and fractions) within the range.

[0035] In this text, unless otherwise specified, the terms "include", "comprise", "contain", "have" or similar terms cover the meanings of "consist of" and "consist essentially of". For example, "A includes a" covers the meanings of "A includes a and others" and "A only includes a".

[0036] In this text, for the sake of concise description, not all possible combinations of all technical features in each embodiment or example are described. Therefore, as long as there is no contradiction in the combination of these technical features, the technical features in each embodiment or example can be combined arbitrarily, and all possible combinations should be considered as the scope described in this specification.

[0037] The present invention provides an epoxy resin adhesive for quickly plugging leaks in oil storage tanks, which includes an epoxy component, a curing component, a compatibilizer, and a curing accelerator;

[0038] The epoxy component includes an epoxy resin and an active diluent; the curing component includes a polyether polyol acrylate and an amine curing agent;

[0039] By mass, the epoxy resin is 15 - 25 parts, the active diluent is 2 - 12 parts, the polyether polyol acrylate is 3 - 15 parts, the amine curing agent is 2 - 10 parts, the compatibilizer is 1 - 3 parts, and the curing accelerator is 0.5 - 1.0 part.

[0040] This epoxy resin preferably is epoxy resin E44 or epoxy resin E51, which has a wide range of material sources, low price, and excellent bonding performance.

[0041] The addition of the active diluent can reduce the viscosity of the product, facilitate construction, and there is no VOC emission during the construction process. The active diluent includes any one of ethylene glycol diglycidyl ether, butanediol diglycidyl ether, and hexanediol diglycidyl ether.

[0042] This polyether polyol acrylate preferably is polyether 5000 polyol acrylate or polyether 600 polyol acrylate.

[0043] The amine curing agent includes any one of aliphatic polyamines, cycloaliphatic polyamines, aromatic polyamines, and macromolecular or high - molecular polyamines derived from aliphatic polyamines, cycloaliphatic polyamines, and aromatic polyamines. The amine curing agent generally has a pungent odor. By modifying with polyfunctional polyether polyol acrylate, its odor can be reduced or even eliminated, and at the same time, the cured coating film can have a certain toughness.

[0044] The specific preparation process of the curing component is as follows: According to the ratio, polyether polyol acrylate and amine curing agent are mixed at 0 °C and then reacted for 0.5 - 1 h to obtain the curing component.

[0045] The curing accelerator is preferably 2,4,6-tris(dimethylaminomethyl)phenol (DMP-30).

[0046] The compatibilizer is an organic compound containing both hydroxyl groups and ester groups, which can make the adhesive have good wettability with the adhesive surface with oil stains and ensure the bonding effect.

[0047] In addition, the preparation process of the compatibilizer is as follows:

[0048] S1: Add phthalic anhydride to n-butanol and stir and react at 90 - 120 °C for 1 - 2 h;

[0049] S2: Add toluene to the reaction product of step S1, stir until evenly dispersed, then add ethylene glycol and p-toluenesulfonic acid, and carry out reflux reaction at 110 - 115 °C. When the acid value of the reaction system is less than 1 KOH / (mg / g), the reaction ends. Remove toluene from the product by vacuum distillation to obtain the compatibilizer. The molar ratio of the reactants phthalic anhydride, n-butanol and ethylene glycol is 1:1:1, toluene is the solvent, and p-toluenesulfonic acid is used as the catalyst, and its addition amount is 0.5% - 2% of the sum of the masses of phthalic anhydride, n-butanol and ethylene glycol.

[0050] Meanwhile, the present invention also discloses a method for using the above epoxy resin adhesive for rapid leakage stoppage of oil storage tanks, specifically as coating the adhesive on the part to be bonded, pressing tightly, and curing. During the curing process, the curing time is 8 - 24 h, and curing is carried out at room temperature.

[0051] The following further elaborates the present invention with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

[0052] Conventional instrument and equipment in the art are used in the following examples. For the experimental methods without specific conditions noted in the following examples, they are usually carried out under conventional conditions or according to the conditions recommended by the manufacturer. Various raw materials are used in the following examples. Unless otherwise stated, commercially available products are used, and their specifications are conventional specifications in the art. In the specification of the present invention and the following examples, unless otherwise specified, "%" represents weight percentage, "parts" represents weight parts, and the ratio represents weight ratio.

[0053] Example 1

[0054] This embodiment provides a solvent-free epoxy resin component, which includes the following components by mass:

[0055] Epoxy resin E44: 20 parts, ethylene glycol diglycidyl ether: 8 parts. Stir the two components in this proportion to obtain a solvent-free epoxy resin component.

[0056] Example 2

[0057] This embodiment provides a solvent-free epoxy resin component, which includes the following components by weight:

[0058] Epoxy resin E51: 20 parts, butanediol diglycidyl ether: 6 parts. Stir the two components in this proportion to obtain a solvent-free epoxy resin component.

[0059] Example 3

[0060] This embodiment provides a solvent-free epoxy resin curing component, and the preparation method of the curing component is as follows:

[0061] Ethylenediamine: 6 parts, polyether 600 polyol acrylate: 13 parts. Add the two components into a three-necked flask in this proportion, stir well, cool in a cold water bath, control the reaction temperature to 0°C, and react for 0.5 to 1 hour to obtain a solvent-free epoxy resin curing component.

[0062] Example 4

[0063] This embodiment provides a solvent-free epoxy resin adhesive, which includes the following components by weight:

[0064] 20 parts of the solvent-free epoxy resin component obtained in Example 1, 8 parts of the curing component obtained in Example 3, 0.5 parts of the curing accelerator (DMP-30), and 1 part of the compatibilizer are mixed in this proportion to obtain a solvent-free epoxy resin adhesive. Prepare the sample according to GB 7124-1986 and apply it to the metal plate with oil stains. At room temperature (15-25°C), 2kg / cm 2 The shear strength was 11.5 MPa after 24 hours under load.

[0065] Example 5

[0066] This embodiment provides a solvent-free epoxy resin adhesive, which includes the following components by weight:

[0067] 20 parts of the solvent-free epoxy resin component obtained in Example 2 and 10 parts of the curing agent component obtained in Example 3. Curing accelerator (DMP-30): 0.5 part, compatibilizer 1.5 parts. Stir all components evenly according to this ratio to obtain a solvent-free epoxy resin adhesive. Prepare samples according to GB 7124—1986, apply them to an oil-contaminated metal plate, and test the shear strength after 24 hours at room temperature (15~25℃) and a load of 2 kg / cm 2 The shear strength was tested to be 28.3 MPa after 24 hours under a load.

[0068] Example 6

[0069] This example provides a preparation method of a curing component. According to the ratio, 3 parts of polyether 600 polyol acrylate and 2 parts of aliphatic polyamine are mixed at 0℃ and reacted for 0.5 h to obtain a curing component.

[0070] Example 7

[0071] This example provides a preparation method of a curing component. According to the ratio, 5 parts of polyether 5000 polyol acrylate and 5 parts of alicyclic polyamine are mixed at 0℃ and reacted for 0.8 h to obtain a curing component.

[0072] Example 8

[0073] This example provides a preparation method of a curing component. According to the ratio, 15 parts of polyether 600 polyol acrylate and 10 parts of aromatic polyamine are mixed at 0℃ and reacted for 1 h to obtain a curing component.

[0074] Example 9

[0075] This example provides a compatibilizer, an organic compound containing both hydroxyl and ester groups, which can make the adhesive have good wettability with the oil-contaminated bonding surface and ensure the bonding effect.

[0076] The preparation process of this compatibilizer is as follows:

[0077] S1: Add 0.1 mol of phthalic anhydride to 0.1 mol of n-butanol and stir and react at 90℃ for 1 h;

[0078] S2: Add toluene to the reaction product of step S1, stir until evenly dispersed, then add 0.1 mol of ethylene glycol and p-toluenesulfonic acid, and carry out a reflux reaction at 110℃. When the acid value of the reaction system is less than 1 KOH / (mg / g), the reaction ends. Remove toluene from the product by vacuum distillation to obtain the compatibilizer. The addition amount of p-toluenesulfonic acid is 0.5% of the sum of the masses of phthalic anhydride, n-butanol and ethylene glycol.

[0079] Example 10

[0080] This embodiment provides a compatibilizer, and the preparation process of the compatibilizer is as follows:

[0081] S1: Add 0.2 mol of phthalic anhydride to 0.2 mol of n-butanol, and stir and react at 100 °C for 1.5 h;

[0082] S2: Add toluene to the reaction product of step S1, stir until evenly dispersed, then add 0.2 mol of ethylene glycol and p-toluenesulfonic acid, and carry out a reflux reaction at 110 °C. When the acid value of the reaction system is less than 1 KOH / (mg / g), the reaction ends. Remove the toluene in the product by vacuum distillation to obtain the compatibilizer. The addition amount of p-toluenesulfonic acid is 1.5% of the sum of the masses of phthalic anhydride, n-butanol, and ethylene glycol.

[0083] Example 11

[0084] This embodiment provides a compatibilizer, and the preparation process of the compatibilizer is as follows:

[0085] S1: Add 0.2 mol of phthalic anhydride to 0.2 mol of n-butanol, and stir and react at 120 °C for 2 h;

[0086] S2: Add toluene to the reaction product of step S1, stir until evenly dispersed, then add 0.2 mol of ethylene glycol and p-toluenesulfonic acid, and carry out a reflux reaction at 115 °C. When the acid value of the reaction system is less than 1 KOH / (mg / g), the reaction ends. Remove the toluene in the product by vacuum distillation to obtain the compatibilizer. The addition amount of p-toluenesulfonic acid is 2% of the sum of the masses of phthalic anhydride, n-butanol, and ethylene glycol.

[0087] Example 12

[0088] This embodiment provides an epoxy resin adhesive for quickly plugging leaks in oil storage tanks, including an epoxy component, a curing component, a compatibilizer, and a curing accelerator;

[0089] The epoxy component includes 15 parts of epoxy resin E44 and 2 parts of ethylene glycol diglycidyl ether; the curing component is the curing component prepared in Example 6; the compatibilizer is 1 part of the compatibilizer prepared in Example 8; the curing accelerator is 0.5 part of DMP-30.

[0090] Example 13

[0091] This embodiment provides an epoxy resin adhesive for quickly plugging leaks in oil storage tanks, including an epoxy component, a curing component, a compatibilizer, and a curing accelerator;

[0092] The epoxy component includes 20 parts of epoxy resin E51 and 8 parts of butanediol diglycidyl ether; the curing component is the curing component prepared in Example 7; the compatibilizer is 2 parts of the compatibilizer prepared in Example 9; the curing accelerator is 0.8 part of DMP-30.

[0093] Example 14

[0094] This example provides an epoxy resin adhesive for rapid leak stoppage of oil storage tanks, which includes an epoxy component, a curing component, a compatibilizer, and a curing accelerator;

[0095] The epoxy component includes 25 parts of epoxy resin E51 and 12 parts of hexanediol diglycidyl ether; the curing component is the curing component prepared in Example 8; the compatibilizer is 3 parts of the compatibilizer prepared in Example 11; the curing accelerator is 1.0 part of DMP-30.

[0096] Example 15

[0097] This example provides a method for using the epoxy resin adhesive for rapid leak stoppage of oil storage tanks. Specifically, after mixing the epoxy component, curing component, compatibilizer, and curing accelerator of Example 14, it is covered on the part to be bonded, pressed tightly, and cured for 8 h.

[0098] Example 16

[0099] This example provides a method for using the epoxy resin adhesive for rapid leak stoppage of oil storage tanks. Specifically, after mixing the epoxy component, curing component, compatibilizer, and curing accelerator of Example 15, it is covered on the part to be bonded, pressed tightly, and cured for 20 h.

[0100] Figure 1 The shear strength of the adhesive prepared in Example 5 of the present invention after being coated and aged for 30 days at different temperatures. As can be seen from the figure, the shear strength before aging is 28.3 Mpa. After aging at different temperatures, it still has good shear force, effectively meeting the usage requirements.

[0101] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. An epoxy resin adhesive for rapid leak stoppage of oil storage tanks, characterized in that, it includes an epoxy component, a curing component, a compatibilizer and a curing accelerator; the epoxy component includes an epoxy resin and an active diluent; the curing component includes a polyether polyol acrylate and an amine curing agent; by mass, the epoxy resin is 15 - 25 parts, the active diluent is 2 - 12 parts, the polyether polyol acrylate is 3 - 15 parts, the amine curing agent is 2 - 10 parts, the compatibilizer is 1 - 3 parts, and the curing accelerator is 0.5 - 1.0 part.

2. The epoxy resin adhesive for rapid leak stoppage of oil storage tanks according to claim 1, characterized in that, the preparation process of the curing component is: according to the ratio, mix the polyether polyol acrylate and the amine curing agent at 0°C, and react for 0.5 - 1 h to obtain the curing component.

3. The epoxy resin adhesive for rapid leak stoppage of oil storage tanks according to claim 1, characterized in that, the preparation process of the compatibilizer is: S1: Add phthalic anhydride to n-butanol and stir to react; S2: Add toluene to the reaction product of step S1, stir until evenly dispersed, then add ethylene glycol and p-toluenesulfonic acid, and carry out a reflux reaction to obtain the compatibilizer.

4. The epoxy resin adhesive for rapid leak stoppage of oil storage tanks according to claim 3, characterized in that, the reaction temperature of step S1 is 90 - 120°C, and the reaction time is 1 - 2 h.

5. The epoxy resin adhesive for rapid leak stoppage of oil storage tanks according to claim 3, characterized in that, the molar ratio of phthalic anhydride, n-butanol and ethylene glycol is 1:1:

1.

6. The epoxy resin adhesive for rapid leak stoppage of oil storage tanks according to claim 3, characterized in that, the addition amount of p-toluenesulfonic acid is 0.5% - 2% of the sum of the masses of phthalic anhydride, n-butanol and ethylene glycol.

7. The epoxy resin adhesive for rapid leak stoppage of oil storage tanks according to claim 3, characterized in that, the temperature of step S2 is 110 - 115°C.

8. The epoxy resin adhesive for rapid leak stoppage of oil storage tanks according to claim 3, characterized in that, monitor the acid value of the reaction system in step S2, and when the acid value of the reaction system is less than 1 KOH / (mg / g), the reaction ends to obtain the compatibilizer.

9. The epoxy resin adhesive for rapid leak stoppage of oil storage tanks according to claim 3, characterized in that, after the reaction ends, it also includes removing toluene from the product by vacuum distillation.

10. The usage method of the epoxy resin adhesive for rapid leak stoppage of oil storage tanks according to any one of claims 1 - 9, characterized in that, coat the adhesive on the part to be bonded, press it tightly, and cure it. During the curing process, the curing time is 8 - 24 h.

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