Concrete crack repairing waterproof glue as well as preparation method and application thereof

Abstract

The invention discloses a concrete crack repairing waterproof glue and a preparation method and application thereof.The waterproof glue comprises a component A and a component B. The component A comprises 55%-62% of diluted epoxy resin, 15%-20% of bisphenol F epoxy resin, 8%-12% of ethylene glycol acrylate, 9%-13% of diluent, 2%-6% of coupling agent and 1%-3% of accelerant, and the component B comprises 9%-13% of curing agent and 48%-53% of fatty amine modified curing agent. 23%-29% of alicyclic amine modified curing agent, 6%-8% of accelerant and 2%-4% of coupling agent. The waterproof glue for repairing the concrete cracks has the advantages of low viscosity, high adhesive strength, high low-temperature moisture curing speed, good curing effect, environmental friendliness and the like by optimizing the types and dosages of all the raw materials, can be widely applied to waterproofing of concrete engineering, is particularly suitable for permeation waterproofing of water supply pipes and drainage pipes, has an excellent waterproof effect, and is suitable for popularization and application. The use value is high and the application prospect is good.

Description

Technical Field

[0001] The invention relates to a concrete crack repair waterproof adhesive and a preparation method and application thereof. Background Art

[0002] Waterproofing building materials (such as concrete) generally uses waterproof coatings, waterproof coils, etc., but due to their complex construction process and poor durability, water seepage is common, causing great harm and loss to people's lives and property. At present, the existing waterproof coatings are mainly polymer waterproof coatings and non-curing rubber waterproof coatings. There are still problems such as easy shrinkage and cracking of the coating, poor waterproof effect, and easy to volatilize toxic and harmful gases during curing or construction, which will cause secondary pollution to the environment. At the same time, the existing concrete waterproof materials also have shortcomings such as poor permeability and low adhesion strength, and it is difficult to have defects such as poor waterproof effect. Based on this, the inventor of the present application has proposed an epoxy resin waterproof coating, which can not only effectively penetrate into concrete to solve the purpose of waterproofing concrete, but also can firmly bond concrete to other substrates to solve the problem of water seepage in concrete. However, in actual use, it is found that the following aspects still need to be further improved: (a) The compatibility between different types of epoxy resins is poor, resulting in high viscosity and large steric hindrance of the coating, which not only makes it difficult for the coating to quickly penetrate into the pores and gaps on the concrete surface, especially the pores and gaps inside the concrete, so that it is difficult to form a solid body inside the concrete or in deeper gaps, but also difficult to form a denser solid body on the surface and inside the concrete, which makes its adhesion strength on the concrete surface still low, making it difficult to firmly adhere to the concrete surface for a long time, especially making it difficult to make concrete and other substrates firmly bond together for a long time, that is, the effective period of waterproofing and water seepage prevention needs to be further improved. (b) The amount of epoxy resin used is large and the curing rate of the curing agent is slow, resulting in a relatively long curing time for the coating, especially the low temperature and humidity curing time is still long, so it is difficult to quickly form a solid body inside the concrete or in deeper gaps, which easily leads to poor curing effect and poor waterproofing effect inside the concrete. In addition, another epoxy resin reinforcement material proposed by the inventor of the present application can effectively improve the strength of the cured body by compounding bisphenol A epoxy resin with bisphenol A epoxy resin modified by trimethylolpropane triacrylate, but in order to significantly reduce the viscosity of the reinforcement material, a large amount of diluent needs to be added; and in order to achieve effective curing of bisphenol A epoxy resin, a large amount of fatty amine modified curing agent is used, but the curing speed of the fatty amine modified curing agent is relatively slow, resulting in a long curing time of the resin, especially the curing of the cured body inside the concrete requires a longer time, or the curing effect is poor, which leads to poor waterproofing and anti-water seepage effects. At the same time, the large-scale use of fatty amine modified curing agents is not conducive to improving the durability of the reinforcement material.Therefore, how to effectively reduce the viscosity of epoxy resin waterproof coatings and improve the permeability of epoxy resin waterproof coatings on the surface and inside of concrete, as well as how to effectively improve the adhesion strength of epoxy resin waterproof coatings and improve the density and curing speed of the solidified body on the surface and inside of concrete, plays an important role in improving the waterproof, anti-seepage effect and durability of epoxy resin waterproof coatings on building materials (such as concrete), and is also a problem that needs to be solved urgently at this stage. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a concrete crack repair waterproof glue with low viscosity, high adhesion strength, fast low-temperature and humid curing speed and good curing effect, and green and environmentally friendly, as well as a preparation method and application thereof.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0005] A concrete crack repair waterproof adhesive, comprising component A and component B;

[0006] The component A comprises the following raw material components in terms of weight percentage:

[0007]

[0008] The B component comprises the following raw material components in terms of weight percentage:

[0009]

[0010] The dilute epoxy resin is a mixture of bisphenol A epoxy resin, AGE epoxy resin and trimethylolpropane trimethacrylate.

[0011] The above concrete crack repair waterproof glue is further improved in that the weight ratio of bisphenol A epoxy resin, AGE epoxy resin and trimethylolpropane trimethacrylate in the diluted epoxy resin is 9:7:4.

[0012] The above concrete crack repair waterproof glue is further improved, and the epoxy equivalent of the diluted epoxy resin is 165g / mol to 169g / mol.

[0013] The above concrete crack repair waterproof glue is further improved, and the epoxy equivalent of the bisphenol F epoxy resin is 160g / mol to 180g / mol.

[0014] The above concrete crack repair waterproof glue is further improved, wherein the ethylene glycol acrylate is prepared by condensation reaction and dehydration with ethylene glycol and acrylic acid as raw materials, 98% concentrated sulfuric acid as catalyst, at a temperature of 98-105°C; the molar ratio of ethylene glycol to acrylic acid is 1.1-1.2:1.0.

[0015] The above concrete crack repair waterproof glue is further improved, in which, in component A, the diluent is benzyl alcohol; the coupling agent is KH570; and the accelerator is one of phenol and nonylphenol or a mixture thereof.

[0016] The above concrete crack repair waterproof glue is further improved, and the alicyclic amine modified curing agent is prepared from an alicyclic amine curing agent and an epoxy resin, comprising the following steps: adding an alicyclic amine curing agent into a reactor, adjusting the temperature to 32°C to 36°C, dripping an epoxy resin benzyl alcohol solution for 3h to 4h, and after the dripping is completed, adjusting the temperature to 38°C to 42°C and continuing the reaction for 2h to obtain an alicyclic amine modified curing agent; the weight ratio of the alicyclic amine curing agent to the epoxy resin is 3:2; the alicyclic amine curing agent includes IPDA and PACM; the weight ratio of IPDA to PACM is 7-8:12-13; the epoxy resin benzyl alcohol solution is a mixed solution of epoxy resin E-51 and benzyl alcohol; the weight ratio of the epoxy resin E-51 to benzyl alcohol is 3-4:6-7.

[0017] The above concrete crack repair waterproof glue is further improved, wherein the curing agent is at least one of diethylenetriamine, triethylenetetramine, and polyetheramine D230.

[0018] The above concrete crack repair waterproof glue is further improved, and the fatty amine modified curing agent is prepared from a fatty amine curing agent and an epoxy resin, comprising the following steps: adding a fatty amine curing agent into a reactor, adjusting the temperature to 30°C-32°C, dripping an epoxy resin benzyl alcohol solution for 3 hours, and after the dripping is completed, adjusting the temperature to 30°C-34°C, and continuing the reaction for 2 hours to obtain a fatty amine modified curing agent; the weight ratio of the fatty amine curing agent to the epoxy resin benzyl alcohol solution is 25:34; the epoxy resin benzyl alcohol solution is a mixed solution of 618 type epoxy resin and benzyl alcohol; the weight ratio of the 618 type epoxy resin to benzyl alcohol is 13:7; the fatty amine curing agent is one of diethylenetriamine and triethylenetetramine or a mixture thereof.

[0019] The above concrete crack repair waterproof glue is further improved, in which, in component B, the accelerator is a mixture of benzyl alcohol and salicylic acid; the weight ratio of the benzyl alcohol to salicylic acid is 17:3; and the coupling agent is KH570.

[0020] The above concrete crack repair waterproof adhesive is further improved in that the weight ratio of the component A to the component B is 3.93-4.07:1.

[0021] As a general technical concept, the present invention also provides a method for preparing the above-mentioned concrete crack repair waterproof adhesive, comprising the following steps:

[0022] S1. Mix a diluent epoxy resin and a bisphenol F epoxy resin, heat to 50° C. to 55° C., add ethylene glycol acrylate, a diluent, a coupling agent and an accelerator in sequence, stir to obtain component A; mix a curing agent, a fatty amine modified curing agent, alicyclic amine modified curing agent, a coupling agent and an accelerator, adjust the temperature to 30° C. to 35° C., stir to obtain component B;

[0023] S2. Mix component A and component B to obtain concrete crack repair waterproof glue.

[0024] The above preparation method is further improved in that during the preparation of component A, the stirring time is 45 min to 80 min.

[0025] The above preparation method is further improved in that during the preparation of component B, the stirring time is 45 min to 80 min.

[0026] As a general technical concept, the present invention also provides an application of the above concrete crack repair waterproof adhesive or the concrete crack repair waterproof adhesive prepared by the above preparation method in concrete waterproofing.

[0027] Compared with the prior art, the advantages of the present invention are:

[0028] (1) In view of the shortcomings of existing epoxy resin waterproof coatings, such as high viscosity, low adhesion strength, slow curing rate, and the resulting poor permeability of epoxy resin waterproof coatings on the surface and inside of concrete, and difficulty in improving the density and curing effect of the solidified body on the surface and inside of concrete, the present invention creatively provides a concrete crack repair waterproof glue, including component A and component B, wherein component A includes the following raw material components in terms of weight percentage: 55% to 62% of diluent epoxy resin, 1% of bisphenol F epoxy resin 5% to 20%, ethylene glycol acrylate 8% to 12%, diluent 9% to 13%, coupling agent 2% to 6%, accelerator 1% to 3%, and component B includes the following raw material components by weight percentage: curing agent 9% to 13%, fatty amine modified curing agent 48% to 53%, alicyclic amine modified curing agent 23% to 29%, accelerator 6% to 8%, coupling agent 2% to 4%, and the diluted epoxy resin is a mixture of bisphenol A epoxy resin, AGE epoxy resin and trimethylolpropane trimethacrylate. In the component A of the present invention, the epoxy resin used is a diluted bisphenol A epoxy resin and a bisphenol F epoxy resin. The combination of the two can not only effectively reduce the steric hindrance of the molecules and form a more compact solidified body, but also significantly reduce the viscosity of the resin, which is more conducive to penetrating into the internal pores and gaps of the concrete; at the same time, in the component A, the AGE epoxy resin used to prepare the bisphenol A epoxy resin can also assist in reducing the viscosity of the resin, and trimethylolpropane trimethacrylate can also promote the low-temperature curing of the resin. In particular, the ethylene glycol acrylate used can also promote the low-temperature curing of the resin, and can improve the weather resistance of the resin and accelerate the curing of the curing agent, so In component A, under the joint action of trimethylolpropane trimethacrylate and ethylene glycol acrylate, not only can the low-temperature curing of the curing agent be promoted, but also the curing time can be shortened, especially, it is beneficial to improve the curing effect inside the concrete; in component B, the curing agent, fatty amine modified curing agent, and alicyclic amine modified curing agent mainly react with epoxy resin to achieve effective curing of different types of epoxy resins, and at the same time have low-temperature reactivity, hydrophilic curing properties, and low viscosity, which can reduce the mixed viscosity of the system. In particular, the alicyclic amine modified curing agent used has a faster curing rate, which is beneficial to shortening the curing time, and with the help of the accelerator, it can accelerate the curing inside the concrete.On this basis, the present invention further optimizes the amount of each raw material in the A / B component, so that the concrete crack repair waterproof adhesive of the present invention exhibits more excellent performance, such as higher adhesion strength, lower viscosity, faster curing rate, and better low-temperature and humid curing effect. It is a new epoxy resin adhesive with excellent performance and can be widely used for concrete waterproofing. It can be widely used for concrete engineering waterproofing, especially suitable for penetration waterproofing at water pipes and drainage pipes. After curing, it densifies the concrete and cuts off the channels for compounds in the air and water vapor to erode the concrete, achieving a more excellent waterproof effect. At the same time, it has the advantages of simple construction and no small molecule generation, and belongs to an environmentally friendly waterproof material with high use value and good application prospects.

[0029] (2) In the present invention, the alicyclic amine modified curing agent is prepared from the alicyclic amine curing agent and the epoxy resin, which is not only easy to control the viscosity and the usage ratio of the alicyclic amine curing agent to the epoxy resin, but also can improve the curing rate. DETAILED DESCRIPTION

[0030] The present invention is further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0031] The raw materials and instruments used in the following examples are all commercially available; the equipment and preparation processes used are all conventional equipment and conventional processes unless otherwise specified.

[0032] Example 1

[0033] A concrete crack repair waterproof adhesive, comprising component A and component B;

[0034] Component A includes the following raw material components in terms of weight percentage:

[0035]

[0036] Component B includes the following raw material components in terms of weight percentage:

[0037]

[0038] In this embodiment, the diluted epoxy resin is a mixture of bisphenol A epoxy resin, AGE epoxy resin and trimethylolpropane trimethacrylate, wherein the weight ratio of bisphenol A epoxy resin, AGE epoxy resin and trimethylolpropane trimethacrylate is 9:7:4.

[0039] In this embodiment, the epoxy equivalent of the diluted epoxy resin is 168 g / mol.

[0040] In this embodiment, the epoxy equivalent of bisphenol F epoxy resin is 170 g / mol;

[0041] In this embodiment, ethylene glycol acrylate is prepared by condensation reaction and dehydration of ethylene glycol and acrylic acid as raw materials, using 98% concentrated sulfuric acid as a catalyst at a temperature of 98-105°C, wherein the molar ratio of ethylene glycol to acrylic acid is 1.1:1.0.

[0042] In this embodiment, in component A, the diluent is benzyl alcohol, the coupling agent is KH570, and the promoter is phenol. In the present invention, the promoter may also be nonylphenol.

[0043] In this embodiment, the alicyclic amine modified curing agent is prepared from an alicyclic amine curing agent and an epoxy resin, comprising the following steps: adding the alicyclic amine curing agent into a reactor, adjusting the temperature to 32°C to 36°C, dripping the epoxy resin benzyl alcohol solution for 3h to 4h, and after the dripping is completed, adjusting the temperature to 38°C to 42°C and continuing the reaction for 2h to obtain the alicyclic amine modified curing agent, wherein the weight ratio of the alicyclic amine curing agent to the epoxy resin is 3:2, the alicyclic amine curing agent includes IPDA and PACM, the weight ratio of IPDA to PACM is 37:63, and the epoxy resin benzyl alcohol solution is a mixed solution of epoxy resin E-51 and benzyl alcohol, and the weight ratio of epoxy resin E-51 to benzyl alcohol is 7:13.

[0044] In this embodiment, the curing agent is diethylenetriamine. In the present invention, the curing agent may also be triethylenetetramine or polyetheramine D230.

[0045] In this embodiment, the fatty amine modified curing agent is prepared from the fatty amine curing agent and the epoxy resin, comprising the following steps: adding the fatty amine curing agent into the reactor, adjusting the temperature to 30°C-32°C, dripping the epoxy resin benzyl alcohol solution for 3 hours, and after the dripping is completed, adjusting the temperature to 30°C-34°C, and continuing the reaction for 2 hours to obtain the fatty amine modified curing agent, wherein the weight ratio of the fatty amine curing agent to the epoxy resin benzyl alcohol solution is 25:34, the epoxy resin benzyl alcohol solution is a mixed solution of 618 type epoxy resin and benzyl alcohol, the weight ratio of 618 type epoxy resin to benzyl alcohol is 13:7, the fatty amine curing agent is diethylenetriamine, and in the present invention, the fatty amine curing agent can also be triethylenetetramine.

[0046] In this embodiment, in component B, the accelerator is a mixture of benzyl alcohol and salicylic acid, wherein the weight ratio of benzyl alcohol to salicylic acid is 17:3; and the coupling agent is KH570.

[0047] In this embodiment, the weight ratio of component A to component B is 4:1.

[0048] A method for preparing the concrete crack repair waterproof adhesive in the above embodiment comprises the following steps:

[0049] S1. Heat 61.0 g of diluent epoxy resin and 15.0 g of bisphenol F epoxy resin to 50-55° C., add them to a three-necked flask, add 12.0 g of ethylene glycol acrylate, 9.0 g of diluent, 2.0 g of coupling agent and 1.0 g of accelerator in sequence, and stir for 60 minutes to obtain component A. Add 13.0 g of curing agent, 53.0 g of fatty amine modified curing agent, 23.0 g of alicyclic amine modified curing agent, 8.0 g of accelerator and 3.0 g of coupling agent in sequence to a three-necked flask, adjust the temperature to 30-35° C., stir for 60 minutes, and obtain component B.

[0050] S2. Mix component A and component B to obtain concrete crack repair waterproof glue, which can be used directly.

[0051] An application of the concrete crack repair waterproof glue in the above-mentioned embodiment in concrete waterproofing is to apply the concrete crack repair waterproof glue to the surface of concrete (with a water content of 12%) at 25°C, and to apply the waterproof node between the concrete and the water supply pipe (made of PVC), that is, the test object is concrete with a water supply pipe embedded in it.

[0052] After testing: the concrete crack repair waterproof glue in this embodiment is shown in Table 1 and Table 2. In addition, after testing their concrete crack repair waterproof effect at 25°C, the waterproof glue automatically penetrates into the capillaries and pores of the concrete, completely compacts the concrete, and achieves the effect of concrete repair and waterproofing.

[0053] Example 2

[0054] A concrete crack repair waterproof adhesive, comprising component A and component B;

[0055] Component A includes the following raw material components in terms of weight percentage:

[0056]

[0057] Component B includes the following raw material components in terms of weight percentage:

[0058]

[0059] In this embodiment, the diluted epoxy resin is a mixture of bisphenol A epoxy resin, AGE epoxy resin and trimethylolpropane trimethacrylate, wherein the weight ratio of bisphenol A epoxy resin, AGE epoxy resin and trimethylolpropane trimethacrylate is 9:7:4.

[0060] In this embodiment, the epoxy equivalent of the diluted epoxy resin is 168 g / mol.

[0061] In this embodiment, the epoxy equivalent of the bisphenol F epoxy resin is 170 g / mol.

[0062] In this embodiment, ethylene glycol acrylate is prepared by condensation reaction and dehydration of ethylene glycol and acrylic acid as raw materials, using 98% concentrated sulfuric acid as a catalyst at a temperature of 98-105°C, wherein the molar ratio of ethylene glycol to acrylic acid is 1.1:1.0.

[0063] In this embodiment, in component A, the diluent is benzyl alcohol, the coupling agent is KH570, and the promoter is phenol. In the present invention, the promoter may also be nonylphenol.

[0064] In this embodiment, the alicyclic amine modified curing agent is prepared from an alicyclic amine curing agent and an epoxy resin, comprising the following steps: adding the alicyclic amine curing agent into a reactor, adjusting the temperature to 32°C to 36°C, dripping the epoxy resin benzyl alcohol solution for 3h to 4h, and after the dripping is completed, adjusting the temperature to 38°C to 42°C and continuing the reaction for 2h to obtain the alicyclic amine modified curing agent, wherein the weight ratio of the alicyclic amine curing agent to the epoxy resin is 3:2, the alicyclic amine curing agent includes IPDA and PACM, the weight ratio of IPDA to PACM is 37:63, and the epoxy resin benzyl alcohol solution is a mixed solution of epoxy resin E-51 and benzyl alcohol, and the weight ratio of epoxy resin E-51 to benzyl alcohol is 7:13.

[0065] In this embodiment, the curing agent is diethylenetriamine. In the present invention, the curing agent may also be triethylenetetramine or polyetheramine D230.

[0066] In this embodiment, the fatty amine modified curing agent is prepared from the fatty amine curing agent and the epoxy resin, comprising the following steps: adding the fatty amine curing agent into the reactor, adjusting the temperature to 30°C-32°C, dripping the epoxy resin benzyl alcohol solution for 3 hours, and after the dripping is completed, adjusting the temperature to 30°C-34°C, and continuing the reaction for 2 hours to obtain the fatty amine modified curing agent, wherein the weight ratio of the fatty amine curing agent to the epoxy resin benzyl alcohol solution is 25:34, the epoxy resin benzyl alcohol solution is a mixed solution of 618 type epoxy resin and benzyl alcohol, the weight ratio of 618 type epoxy resin to benzyl alcohol is 13:7, the fatty amine curing agent is diethylenetriamine, and in the present invention, the fatty amine curing agent can also be triethylenetetramine.

[0067] In this embodiment, in component B, the accelerator is a mixture of benzyl alcohol and salicylic acid, wherein the weight ratio of benzyl alcohol to salicylic acid is 17:3; and the coupling agent is KH570.

[0068] In this embodiment, the weight ratio of component A to component B is 4:1.

[0069] A method for preparing the concrete crack repair waterproof adhesive in the above embodiment comprises the following steps:

[0070] S1. Heat 55.0 g of diluent epoxy resin and 19.0 g of bisphenol F epoxy resin to 50-55° C., add them to a three-necked flask, add 8.0 g of ethylene glycol acrylate, 12.0 g of diluent, 5.0 g of coupling agent and 1.0 g of accelerator in sequence, and stir for 60 minutes to obtain component A. Add 10.0 g of curing agent, 49.0 g of fatty amine modified curing agent, 29.0 g of alicyclic amine modified curing agent, 8.0 g of accelerator and 4.0 g of coupling agent in sequence to a three-necked flask, adjust the temperature to 30-35° C., stir for 60 minutes, and obtain component B.

[0071] S2. Mix component A and component B to obtain concrete crack repair waterproof glue, which can be used directly.

[0072] An application of the concrete crack repair waterproof glue in the above-mentioned embodiment in concrete waterproofing is to apply the concrete crack repair waterproof glue to the surface of concrete (with a water content of 12%) at 25°C, and to apply the waterproof node between the concrete and the water supply pipe (made of PVC), that is, the test object is concrete with a water supply pipe embedded in it.

[0073] After testing: the concrete crack repair waterproof glue in this embodiment is shown in Table 1 and Table 2. In addition, after testing their concrete crack repair waterproof effect at 25°C, the waterproof glue automatically penetrates into the capillaries and pores of the concrete, completely compacts the concrete, and achieves the effect of concrete repair and waterproofing.

[0074] Example 3

[0075] A concrete crack repair waterproof adhesive, comprising component A and component B;

[0076] Component A includes the following raw material components in terms of weight percentage:

[0077]

[0078] Component B includes the following raw material components in terms of weight percentage:

[0079]

[0080]

[0081] In this embodiment, the diluted epoxy resin is a mixture of bisphenol A epoxy resin, AGE epoxy resin and trimethylolpropane trimethacrylate, wherein the weight ratio of bisphenol A epoxy resin, AGE epoxy resin and trimethylolpropane trimethacrylate is 9:7:4.

[0082] In this embodiment, the epoxy equivalent of the diluted epoxy resin is 168 g / mol.

[0083] In this embodiment, the epoxy equivalent of the bisphenol F epoxy resin is 170 g / mol.

[0084] In this embodiment, ethylene glycol acrylate is prepared by condensation reaction and dehydration of ethylene glycol and acrylic acid as raw materials, using 98% concentrated sulfuric acid as a catalyst at a temperature of 98-105°C, wherein the molar ratio of ethylene glycol to acrylic acid is 1.1:1.0.

[0085] In this embodiment, in component A, the diluent is benzyl alcohol, the coupling agent is KH570, and the promoter is phenol. In the present invention, the promoter may also be nonylphenol.

[0086] In this embodiment, the alicyclic amine modified curing agent is prepared from an alicyclic amine curing agent and an epoxy resin, comprising the following steps: adding the alicyclic amine curing agent into a reactor, adjusting the temperature to 32°C to 36°C, dripping the epoxy resin benzyl alcohol solution for 3h to 4h, and after the dripping is completed, adjusting the temperature to 38°C to 42°C and continuing the reaction for 2h to obtain the alicyclic amine modified curing agent, wherein the weight ratio of the alicyclic amine curing agent to the epoxy resin is 3:2, the alicyclic amine curing agent includes IPDA and PACM, the weight ratio of IPDA to PACM is 37:63, and the epoxy resin benzyl alcohol solution is a mixed solution of epoxy resin E-51 and benzyl alcohol, and the weight ratio of epoxy resin E-51 to benzyl alcohol is 7:13.

[0087] In this embodiment, the curing agent is diethylenetriamine. In the present invention, the curing agent may also be triethylenetetramine or polyetheramine D230.

[0088] In this embodiment, the fatty amine modified curing agent is prepared from the fatty amine curing agent and the epoxy resin, comprising the following steps: adding the fatty amine curing agent into the reactor, adjusting the temperature to 30°C-32°C, dripping the epoxy resin benzyl alcohol solution for 3 hours, and after the dripping is completed, adjusting the temperature to 30°C-34°C, and continuing the reaction for 2 hours to obtain the fatty amine modified curing agent, wherein the weight ratio of the fatty amine curing agent to the epoxy resin benzyl alcohol solution is 25:34, the epoxy resin benzyl alcohol solution is a mixed solution of 618 type epoxy resin and benzyl alcohol, the weight ratio of 618 type epoxy resin to benzyl alcohol is 13:7, the fatty amine curing agent is diethylenetriamine, and in the present invention, the fatty amine curing agent can also be triethylenetetramine.

[0089] In this embodiment, in component B, the accelerator is a mixture of benzyl alcohol and salicylic acid, wherein the weight ratio of benzyl alcohol to salicylic acid is 17:3; and the coupling agent is KH570.

[0090] In this embodiment, the weight ratio of component A to component B is 4:1.

[0091] A method for preparing the concrete crack repair waterproof adhesive in the above embodiment comprises the following steps:

[0092] S1. Heat 57.0 g of diluent epoxy resin and 17.0 g of bisphenol F epoxy resin to 50-55° C., add them to a three-necked flask, add 10.0 g of ethylene glycol acrylate, 11.0 g of diluent, 3.0 g of coupling agent and 2.0 g of accelerator in sequence, and stir for 60 minutes to obtain component A. Add 12.0 g of curing agent, 51.0 g of fatty amine modified curing agent, 27.0 g of alicyclic amine modified curing agent, 7.0 g of accelerator and 3.0 g of coupling agent in sequence to a three-necked flask, adjust the temperature to 30-35° C., stir for 60 minutes, and obtain component B.

[0093] S2. Mix component A and component B to obtain concrete crack repair waterproof glue, which can be used directly.

[0094] An application of the concrete crack repair waterproof glue in the above-mentioned embodiment in concrete waterproofing is to apply the concrete crack repair waterproof glue to the surface of concrete (with a water content of 12%) at 25°C, and to apply the waterproof node between the concrete and the water supply pipe (made of PVC), that is, the test object is concrete with a water supply pipe embedded in it.

[0095] After testing: the concrete crack repair waterproof glue in this embodiment is shown in Table 1 and Table 2. In addition, after testing their concrete crack repair waterproof effect at 25°C, the waterproof glue automatically penetrates into the capillaries and pores of the concrete, completely compacts the concrete, and achieves the effect of concrete repair and waterproofing.

[0096] Comparative Example 1

[0097] A concrete crack repair waterproof adhesive, comprising component A and component B;

[0098] Component A includes the following raw material components in terms of weight percentage:

[0099]

[0100] Component B includes the following raw material components in terms of weight percentage:

[0101]

[0102] In Comparative Example 1, except for the different amounts of the raw materials, other conditions are the same as those of Example 3.

[0103] At 25°C, the concrete crack repair waterproof glue in Comparative Example 1 was applied to the surface of concrete (water content was 12%), and to the waterproof node between the concrete and the water supply pipe (made of PVC), that is, the test object was concrete with a water supply pipe embedded in it.

[0104] After testing: the concrete crack repair waterproof glue in this embodiment is shown in Table 1 and Table 2. In addition, after testing their concrete crack repair waterproof effect at 25°C, the depth of the waterproof glue automatically penetrating into the capillary pores and pores of the concrete becomes poor, and the concrete cracks and pores cannot be effectively repaired, the concrete cannot be completely dense, and the requirements of concrete repair and waterproofing cannot be met.

[0105] Comparative Example 2

[0106] A concrete crack repair waterproof adhesive, comprising component A and component B;

[0107] Component A includes the following raw material components in terms of weight percentage:

[0108]

[0109] Component B includes the following raw material components in terms of weight percentage:

[0110]

[0111] In Comparative Example 2, except for the different amounts of the raw materials, other conditions are the same as those of Example 3.

[0112] At 25°C, the concrete crack repair waterproof glue in Comparative Example 2 was applied to the surface of concrete (water content was 12%), and to the waterproof node between the concrete and the water supply pipe (made of PVC), that is, the test object was concrete with a water supply pipe embedded in it.

[0113] After testing: the concrete crack repair waterproof glue in this embodiment is shown in Table 1 and Table 2. In addition, after testing their concrete crack repair waterproof effect at 25°C, the depth of the waterproof glue automatically penetrating into the capillary pores and pores of the concrete becomes poor, and the concrete cracks and pores cannot be effectively repaired, the concrete cannot be completely dense, and the requirements of concrete repair and waterproofing cannot be met.

[0114] Comparative Example 3

[0115] A concrete crack repair waterproof adhesive, comprising component A and component B;

[0116] Component A includes the following raw material components in terms of weight percentage:

[0117]

[0118]

[0119] Component B includes the following raw material components in terms of weight percentage:

[0120]

[0121] In Comparative Example 3, except for the different amounts of the raw materials, other conditions are the same as those of Example 3.

[0122] At 25°C, the concrete crack repair waterproof glue in Comparative Example 3 was applied to the surface of concrete (water content was 12%), and to the waterproof node between the concrete and the water supply pipe (made of PVC), that is, the test object was concrete with a water supply pipe embedded in it.

[0123] After testing: the concrete crack repair waterproof glue in this embodiment is shown in Table 1 and Table 2. In addition, after testing their concrete crack repair waterproof effect at 25°C, the waterproof glue automatically penetrates into the capillaries and pores of the concrete and completely densifies the concrete. However, the glue layer is relatively soft, the adhesion strength is low and it is easy to fall off, which cannot meet the requirements of concrete building waterproofing.

[0124] Comparative Example 4

[0125] A concrete crack repair waterproof adhesive, comprising component A and component B;

[0126] Component A includes the following raw material components in terms of weight percentage:

[0127]

[0128] Component B includes the following raw material components in terms of weight percentage:

[0129]

[0130]

[0131] In Comparative Example 4, except for the different amounts of the raw materials, other conditions were the same as those of Example 3.

[0132] At 25°C, the concrete crack repair waterproof glue in Comparative Example 4 was applied to the surface of concrete (water content was 12%), and to the waterproof node between the concrete and the water supply pipe (made of PVC), that is, the test object was concrete with a water supply pipe embedded in it.

[0133] After testing: the concrete crack repair waterproof glue in this embodiment is shown in Table 1 and Table 2. In addition, after testing their concrete crack repair waterproof effect at 25°C, the depth of the waterproof glue automatically penetrating into the capillary pores and pores of the concrete becomes poor, and the concrete cracks and pores cannot be effectively repaired, the concrete cannot be completely dense, and the requirements of concrete repair and waterproofing cannot be met.

[0134] Comparative Example 5

[0135] A concrete crack repair waterproof adhesive, comprising component A and component B;

[0136] Component A includes the following raw material components in terms of weight percentage:

[0137]

[0138] Component B includes the following raw material components in terms of weight percentage:

[0139]

[0140] In Comparative Example 5, except for the different amounts of the raw materials, other conditions are the same as those of Example 3.

[0141] At 25°C, the concrete crack repair waterproof glue in Comparative Example 5 was applied to the surface of concrete (water content of 12%), and to the waterproof node between the concrete and the water supply pipe (made of PVC), that is, the test object was concrete with a water supply pipe embedded in it.

[0142] After testing: the concrete crack repair waterproof glue in this embodiment is shown in Table 1 and Table 2. In addition, after testing their concrete crack repair waterproof effect at 25°C, the depth of the waterproof glue automatically penetrating into the capillary pores and pores of the concrete becomes poor, and the concrete cracks and pores cannot be effectively repaired, the concrete cannot be completely dense, and the requirements of concrete repair and waterproofing cannot be met.

[0143] Table 1 Performance comparison of different concrete crack repair waterproof adhesives

[0144]

[0145] In Table 1, the testing standards for viscosity, adhesion strength, and permeability are GB / T 2794, GB / T 5210, and JC / T2217, respectively. As can be seen from Table 1, the concrete crack repair waterproof adhesive of the present invention exhibits more excellent performance, such as higher adhesion strength, lower viscosity, faster curing rate, and better low-temperature and humid curing effect. It is a new type of epoxy resin adhesive with excellent performance and can be widely used for concrete waterproofing. It can be widely used for concrete engineering waterproofing, especially for penetration waterproofing at water supply pipes and drainage pipes. After curing, it densifies the concrete, cuts off the channels for compounds in the air and water vapor to erode the concrete, and achieves a more excellent waterproofing effect. At the same time, compared with conventional epoxy resin waterproof coatings, the concrete crack repair waterproof glue of the present invention has the following advantages: 1. Lower viscosity and stronger permeability; 2. Higher adhesion strength, not only the adhesive layer and concrete will not peel off, but also the adhesion strength with the node is higher, the waterproof effect is better, and it meets the mandatory national standard GB55030-2022 durability requirements of 20 or 25 years; 3. The present invention uses modified acrylic materials (such as ethylene glycol acrylate) that are resistant to ultraviolet aging, and the aging resistance time is longer; 4. The epoxy resin itself has excellent aging resistance, water resistance, acid and alkali resistance and corrosion resistance, and excellent bonding performance.

[0146] Table 2 Durability test results of different solidified bodies at the waterproof joint between concrete and water pipe under the condition of curing temperature of 25℃

[0147]

[0148] In Table 2, the testing standard adopted is GB / T 19250-2013.

[0149] As can be seen from Table 2, whether it is heat treatment, acid-base treatment, or long-term aging treatment, the concrete crack repair waterproof glue prepared by the present invention can maintain a high tensile strength, which shows that the concrete crack repair waterproof glue prepared by the present invention has very excellent durability when used for concrete waterproofing, and can achieve longer-term waterproofing. At the same time, compared with conventional epoxy resin waterproof coatings, the concrete crack repair waterproof glue of the present invention has the following advantages: 1. Better aging resistance; 2. Better medium resistance (especially when bisphenol F epoxy resin is used, the waterproof glue is denser and more corrosion-resistant after curing).

[0150] It can be seen from the above results that compared with conventional epoxy resin waterproof coatings, the concrete crack repair waterproof glue of the present invention optimizes the types of raw materials in the A / B components and the amounts of each raw material, so that the concrete crack repair waterproof glue of the present invention exhibits more excellent performance, has the advantages of low viscosity, high adhesion strength, fast low-temperature and humid curing speed and good curing effect, and is green and environmentally friendly. It is a new type of epoxy resin glue with excellent performance and can be widely used for concrete waterproofing. It can be widely used for concrete engineering waterproofing, especially suitable for penetration waterproofing at water pipes and drainage pipes, and after curing, it compacts concrete and has a more excellent waterproof effect. It also has the advantages of simple construction and no small molecule generation. It is an environmentally friendly waterproof material with high use value and good application prospects.

[0151] The above embodiments are only preferred implementations of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A concrete crack repair waterproof glue, characterized in that: It includes component A and component B; The component A comprises the following raw material components in terms of weight percentage: The B component comprises the following raw material components in terms of weight percentage: The dilute epoxy resin is a mixture of bisphenol A epoxy resin, AGE epoxy resin and trimethylolpropane trimethacrylate.

2. The concrete crack repair waterproof glue according to claim 1, characterized in that: The weight ratio of bisphenol A epoxy resin, AGE epoxy resin and trimethylolpropane trimethacrylate in the dilute epoxy resin is 9:7:

4.

3. The concrete crack repair waterproof glue according to claim 2, characterized in that: The epoxy equivalent of the diluted epoxy resin is 165 g / mol to 169 g / mol.

4. The concrete crack repair waterproof adhesive according to claim 3, characterized in that: The epoxy equivalent of the bisphenol F epoxy resin is 160 g / mol to 180 g / mol; The ethylene glycol acrylate is prepared by condensation reaction and dehydration at a temperature of 98-105° C. using ethylene glycol and acrylic acid as raw materials and 98% concentrated sulfuric acid as a catalyst; the molar ratio of ethylene glycol to acrylic acid is 1.1-1.2:1.0; In component A, the diluent is benzyl alcohol; the coupling agent is KH570; and the accelerator is phenol, nonylphenol or a mixture thereof.

5. The concrete crack repair waterproof adhesive according to any one of claims 1 to 4, characterized in that: The alicyclic amine modified curing agent is prepared from an alicyclic amine curing agent and an epoxy resin, and comprises the following steps: adding the alicyclic amine curing agent into a reactor, adjusting the temperature to 32°C to 36°C, dripping the epoxy resin benzyl alcohol solution for 3h to 4h, and after the dripping is completed, adjusting the temperature to 38°C to 42°C and continuing the reaction for 2h to obtain the alicyclic amine modified curing agent; the weight ratio of the alicyclic amine curing agent to the epoxy resin is 3:2; the alicyclic amine curing agent comprises IPDA and PACM; the weight ratio of IPDA to PACM is 7-8:12-13; the epoxy resin benzyl alcohol solution is a mixed solution of epoxy resin E-51 and benzyl alcohol; the weight ratio of the epoxy resin E-51 to benzyl alcohol is 3-4:6-7.

6. The concrete crack repair waterproof adhesive according to claim 5, characterized in that: The curing agent is at least one of diethylenetriamine, triethylenetetramine, and polyetheramine D230; The fatty amine modified curing agent is prepared from a fatty amine curing agent and an epoxy resin, and comprises the following steps: adding the fatty amine curing agent into a reactor, adjusting the temperature to 30°C-32°C, dripping the epoxy resin benzyl alcohol solution for 3 hours, adjusting the temperature to 30°C-34°C after the dripping is completed, and continuing the reaction for 2 hours to obtain the fatty amine modified curing agent; the weight ratio of the fatty amine curing agent to the epoxy resin benzyl alcohol solution is 25:34; the epoxy resin benzyl alcohol solution is a mixed solution of 618 type epoxy resin and benzyl alcohol; the weight ratio of the 618 type epoxy resin to benzyl alcohol is 13:7; the fatty amine curing agent is one of diethylenetriamine and triethylenetetramine or a mixture thereof; In component B, the accelerator is a mixture of benzyl alcohol and salicylic acid; the weight ratio of benzyl alcohol to salicylic acid is 17:3; and the coupling agent is KH570.

7. The concrete crack repair waterproof adhesive according to any one of claims 1 to 4, characterized in that: The weight ratio of the component A to the component B is 3.93-4.07:

1.

8. A method for preparing the concrete crack repair waterproof adhesive according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Mix a diluent epoxy resin and a bisphenol F epoxy resin, heat to 50° C. to 55° C., add ethylene glycol acrylate, a diluent, a coupling agent and an accelerator in sequence, stir to obtain component A; mix a curing agent, a fatty amine modified curing agent, alicyclic amine modified curing agent, a coupling agent and an accelerator, adjust the temperature to 30° C. to 35° C., stir to obtain component B; S2. Mix component A and component B to obtain concrete crack repair waterproof glue.

9. The preparation method according to claim 8, characterized in that: During the preparation of component A, the stirring time is 45 min to 80 min; During the preparation of the component B, the stirring time is 45 min to 80 min.

10. Use of the concrete crack repair waterproof adhesive according to any one of claims 1 to 7 or the concrete crack repair waterproof adhesive prepared by the preparation method according to claim 8 or 9 in concrete waterproofing.

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