Underwater sealing structural adhesive as well as preparation method and application thereof

Abstract

The invention discloses an underwater sealing structural adhesive as well as a preparation method and application thereof. The underwater sealing structural adhesive is prepared from 20 to 30 parts of organic silicon modified epoxy resin, 10 to 20 parts of silane-terminated polyester, 10 to 15 parts of polyether polyol, 50.5 to 60.5 parts of filler, 15 to 25 parts of talcum powder, 1 part of fumed silica and 4.5 to 5.5 parts of titanium dioxide. The preparation method comprises the following steps: weighing the organic silicon modified epoxy resin, the silane-terminated polyester, the polyether polyol, the filler, the talcum powder, the fumed silica and the titanium dioxide in proportion, sequentially adding into a stirrer, stirring for 1-3 hours, uniformly stirring to obtain the underwater sealing structural adhesive, and packaging the discharged underwater sealing structural adhesive into a rubber tube. The application is to bond a joint in a water channel without cutting off water. According to the technical scheme provided by the invention, the technical problem that the bonding effect is poor when new and old geomembranes or concrete structures or the geomembranes and the concrete structures are bonded underwater is solved.

Description

Technical Field

[0001] The invention relates to the technical field of sealing structural adhesives, in particular to an underwater sealing structural adhesive and a preparation method and application thereof. Background Art

[0002] Sealant refers to a sealing material that deforms with the shape of the sealing surface, is not easy to flow, and has a certain degree of adhesion. It is an adhesive used to fill the gap of the configuration to play a sealing role. It has the functions of preventing leakage, waterproofing, vibration prevention, sound insulation, and heat insulation. Sealant in the prior art is usually made of dry or non-dry viscous materials such as asphalt, natural resin or synthetic resin, natural rubber or synthetic rubber as the base material, combined with inert fillers such as talcum powder, white clay, carbon black, titanium dioxide and asbestos, and then added with plasticizers, solvents, curing agents, accelerators, etc.

[0003] The water diversion channel has been in operation for a long time. Affected by heavy rainfall during the flood season every year, the groundwater level rises, and the channel lining panels are prone to jacking, primary horseway foundation collapse, polyethylene composite geomembrane damage, etc., resulting in the channel not having an anti-seepage effect. Most of the existing polyethylene composite geomembrane bonding technologies are used in waterless conditions during channel construction, that is, dry land operations, such as welding and KS glue bonding technology. When performing underwater bonding operations, most of the SR plastic water-stopping material bonding technologies used have problems such as weak bonding and the risk of water seepage. At the same time, SR plastic water-stopping material is a solidified substance that tends to harden in low-temperature water. It is not easy to bond firmly if it is not pressed hard during use.

[0004] For example, a Chinese invention patent with an authorization announcement date of 2015.09.16 and an authorization announcement number of CN103965820B discloses a high-strength underwater structural adhesive and a preparation method thereof. The adhesive is prepared by mixing component A and component B in a weight ratio of 1:1, wherein component A comprises, by weight: 30 to 48 parts of nano-rubber modified epoxy resin, 50 to 70 parts of bisphenol A epoxy resin, and 4 to 6 parts of thixotropic agent; and component B comprises, by weight: 50 to 60 parts of underwater curing agent, 1 to 2 parts of accelerator, 1 to 3 parts of coupling agent, 2 to 4 parts of wetting agent, 1 to 2 parts of thixotropic agent, and 40 to 80 parts of filler.

[0005] Although the above invention patent records that it has the characteristics of complete underwater bonding, underwater curing, high bonding strength and short solidification time, and can be used for bonding, repairing, sealing and plugging leaks, and reinforcement of various underwater buildings, its application scope is very limited. The application scenarios of the high-strength underwater structural adhesive disclosed in the above invention patent are not only limited by factors such as temperature and water flow, but also cannot be used for bonding and sealing of underwater geomembranes. Summary of the invention

[0006] In view of the deficiencies in the above-mentioned background art, the present invention provides an underwater sealing structural adhesive, its preparation method and application, which solve the technical problem that existing sealing structural adhesives are difficult to bond geomembranes underwater with high flow rates and large temperature differences.

[0007] The technical solution of this application is as follows: An underwater sealing structural adhesive, comprising 20 - 30 parts of organosilicon-modified epoxy resin, 10 - 20 parts of terminal silane polyester, 10 - 15 parts of polyether polyol, 50.5 - 60.5 parts of filler, 15 - 25 parts of talcum powder, 1 part of fumed silica, and 4.5 - 5.5 parts of titanium dioxide.

[0008] Further, it comprises 20 parts of organosilicon-modified epoxy resin, 10 parts of terminal silane polyester, 10 parts of polyether polyol, 50.5 parts of filler, 15 parts of talcum powder, 1 part of fumed silica, and 4.5 parts of titanium dioxide.

[0009] Further, it comprises 30 parts of organosilicon-modified epoxy resin, 20 parts of terminal silane polyester, 15 parts of polyether polyol, 60.5 parts of filler, 25 parts of talcum powder, 1 part of fumed silica, and 5.5 parts of titanium dioxide.

[0010] Further, it comprises 25 parts of organosilicon-modified epoxy resin, 15 parts of terminal silane polyester, 12 parts of polyether polyol, 55.5 parts of filler, 20 parts of talcum powder, 1 part of fumed silica, and 5 parts of titanium dioxide.

[0011] Further, the filler includes silica powder or / and quartz sand or / and nano-oxide.

[0012] A preparation method of an underwater sealing structural adhesive, weighing 20 - 30 parts of organosilicon-modified epoxy resin, 10 - 20 parts of terminal silane polyester, 10 - 15 parts of polyether polyol, 50.5 - 60.5 parts of filler, 15 - 25 parts of talcum powder, 1 part of fumed silica, and 4.5 - 5.5 parts of titanium dioxide in proportion, adding them to a mixer in sequence and stirring for 1 - 3 hours. After stirring evenly, the underwater sealing structural adhesive is obtained, and the discharged underwater sealing structural adhesive is packaged into a rubber tube.

[0013] An application of an underwater sealing structural adhesive, using the above-mentioned underwater sealing structural adhesive to bond the joints in a non-stop water canal.

[0014] Further, the joints are the gaps between underwater geomembranes or the gaps between concrete structures or the gaps between concrete structures and geomembranes.

[0015] Further, when using the underwater sealing structural adhesive to bond the joints in a non-stop water canal, the diver first cleans the gluing surface underwater, then cuts the nozzle of the rubber tube, installs the special glue nozzle worn, then puts on a glass glue gun, and presses the glue gun to apply glue to the gluing surface.

[0016] Further, when cleaning the sizing surface, clean the ash layer, silt, and sundries in the water; when sizing the sizing surface, press the glue nozzle tightly against the sizing surface, apply glue at least two rounds around the repair part, and then press hard on the underwater sealant between the joints.

[0017] The technical solution provided by the present invention solves the technical problem of poor bonding effect when bonding between new and old geomembranes, between concrete structures, or between a geomembrane and a concrete structure underwater. The underwater sealant provided by the present invention is a black, uniform paste, without bubbles, lumps, gels, skinning, and without precipitates that are not easily dispersed. The underwater sealant provided by the present invention is composed of resin, rubber powder, solvent, filler, auxiliary agent, stabilizer, curing agent, non-dispersant and other materials mixed together, and is a single-component. The application method of the underwater sealant provided by the present invention is simple and easy to implement, and the sealing effect is good. Divers clean the sizing surface underwater, remove the ash layer, silt, sundries, etc., cut the nozzle of the glue tube, install the special glue nozzle with accessories, then put on an ordinary glass glue gun, press the glue gun to apply glue, the glue comes out and adheres tightly to the sizing surface, the glue amount is sufficient, apply glue two rounds around the repair part, and press hard. The underwater sealant provided by the present invention can operate on a sizing surface below 5°C, and can also operate without stopping water in a water channel with a relatively large flow rate. Through a series of tests, the underwater sealant provided by the present invention plays a very firm role in bonding new and old geomembranes underwater, and the bonding effect between the geomembrane and concrete, and between concrete and concrete is also ideal. Specific Embodiments

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the core concept of the present invention and the following embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] An underwater sealant, comprising 20 - 30 parts of organosilicon-modified epoxy resin, 10 - 20 parts of terminal silane polyester, 10 - 15 parts of polyether polyol, 50.5 - 60.5 parts of filler, 15 - 25 parts of talcum powder, 1 part of fumed silica, and 4.5 - 5.5 parts of titanium dioxide.

[0020] Further, the filler includes silica powder and / or quartz sand and / or nano-oxide.

[0021] The actual use environment of the underwater sealant is an important basis for testing whether the material is safe and reliable and convenient for construction. The actual use environment has a crucial impact on the accuracy and reliability of the experimental results. The following is some description of the experimental environment: 1. In the actual usage environment, we have divers wearing diving equipment and equipped with underwater camera devices.

[0022] 2. The water quality in the actual usage operation is very clear with high visibility, ensuring the quality of visual observation during the experiment process.

[0023] 3. The water depth in the actual usage operation environment can be implemented at different depths under the control of divers, ensuring the performance and usage effects of experimental materials under different pressures.

[0024] 4. The water flow in the actual usage environment is very large, with a flow rate of 1 meter per second. This can verify the adhesion and anti-dispersion properties of experimental materials under water flow scouring, and at the same time detect the influence of water flow on the materials during and after the solidification process.

[0025] 5. The temperature change in the actual usage environment is relatively large, ensuring the solidification time, solidification process, and physical effects of materials after complete solidification at different temperatures.

[0026] 6. There are relatively abundant bonding materials in the actual usage environment. We used a variety of materials for experiments, ensuring the wide range of material usage.

[0027] 7. The convenience of the actual usage environment. Due to the special underwater construction environment, it can better reflect the construction progress and operability.

[0028] 8. The variability of the actual usage environment. Due to the change in water level, the experimental materials will be in water for a period of time and above water for a period of time, which can better reflect the stability of the materials against the natural environment.

[0029] 9. The influence of the actual usage environment on water, fish, and algae plants.

[0030] The following is the experimental comparison under the actual usage environment: 1. The underwater sealant is very convenient to operate. Divers can operate it with one hand against the water flow without repeatedly surfacing to prepare the material and install the operating equipment.

[0031] 2. Under the same water flow rate, the underwater sealant has very strong adhesion and will not be washed away by water during the experiment. Other materials show flocculation and are washed away by water under the scouring of water flow, and at the same time have a strong restrictive effect on the construction materials.

[0032] 3. Under the same usage environment, temperature has little influence on the underwater sealant. There is no change in its solidification process and performance after complete solidification. Other materials are more affected by temperature, showing phenomena such as non-solidification or incomplete solidification at low temperatures.

[0033] 4. Aesthetic effect after solidification. Since the underwater sealant has very convenient operability, divers can easily apply the construction materials during the construction process, resulting in a stronger aesthetic effect after solidification.

[0034] 5. Bonding strength after solidification. The underwater sealant has very strong stability in the actual experimental environment, and the solidification process and the effect after solidification are the same as those in the ground experiment. There is no difference between the solidification process with water and without water, and the solidification effect of other materials above the water surface is better than that below the water surface.

[0035] 6. The underwater sealant has no impact on the surrounding experimental environment, and there are no changes in the surrounding water quality, fish, and algae. Other materials cause changes in the color of the surrounding water quality and the death of fish.

[0036] 7. The solidification process and the effect after solidification of the underwater sealant do not change at different water depths and can be used at any water depth. Other materials are greatly affected by pressure and do not solidify or solidify slowly under high pressure.

[0037] 8. The underwater sealant has very good specific gravity in the actual use environment. When the material is extruded alone in suspension in water, it does not float or shift in the landing point, while other materials have the problem of being washed away by water and cannot be found.

[0038] 9. The flexibility performance of the underwater sealant is very prominent. It has a very good effect on bonding soft materials and does not cause problems such as fracture and debonding. It has a relatively strong tensile force for bonding after concrete cracks and will not cause debonding or falling off due to the continuous widening or dislocation of the cracks. Other materials become hard after solidification and are prone to cracking and breaking.

[0039] Example 1 An underwater sealant, comprising 20 parts of organosilicon-modified epoxy resin, 10 parts of terminal silane polyester, 10 parts of polyether polyol, 50.5 parts of filler, 15 parts of talc powder, 1 part of fumed silica, and 4.5 parts of titanium dioxide. The filler is silica powder.

[0040] Example 2 An underwater sealant, comprising 30 parts of organosilicon-modified epoxy resin, 20 parts of terminal silane polyester, 15 parts of polyether polyol, 60.5 parts of filler, 25 parts of talc powder, 1 part of fumed silica, and 5.5 parts of titanium dioxide. The filler is quartz sand.

[0041] Example 3 An underwater sealant, comprising 25 parts of organosilicon-modified epoxy resin, 15 parts of terminal silane polyester, 12 parts of polyether polyol, 55.5 parts of filler, 20 parts of talc powder, 1 part of fumed silica, and 5 parts of titanium dioxide. The filler is nano-oxide.

[0042] Example 4 An underwater sealing structural adhesive, comprising 20 parts of organosilicon-modified epoxy resin, 10 parts of terminal silane polyester, 10 parts of polyether polyol, 60.5 parts of filler, 25 parts of talc powder, 1 part of fumed silica, and 5.5 parts of titanium dioxide. The filler is silica powder.

[0043] Example 5 An underwater sealing structural adhesive, comprising 30 parts of organosilicon-modified epoxy resin, 20 parts of terminal silane polyester, 15 parts of polyether polyol, 50.5 parts of filler, 15 parts of talc powder, 1 part of fumed silica, and 4.5 parts of titanium dioxide. The filler is silica powder and quartz sand.

[0044] Example 6 An underwater sealing structural adhesive, comprising 25 parts of organosilicon-modified epoxy resin, 15 parts of terminal silane polyester, 12 parts of polyether polyol, 60.5 parts of filler, 25 parts of talc powder, 1 part of fumed silica, and 5.5 parts of titanium dioxide. The filler is nano-oxide and quartz sand.

[0045] Example 7 An underwater sealing structural adhesive, comprising 25 parts of organosilicon-modified epoxy resin, 15 parts of terminal silane polyester, 12 parts of polyether polyol, 50.5 parts of filler, 15 parts of talc powder, 1 part of fumed silica, and 4.5 parts of titanium dioxide. The filler is nano-oxide, quartz sand and silica powder.

[0046] Example 8 An underwater sealing structural adhesive, comprising 20 parts of organosilicon-modified epoxy resin, 10 parts of terminal silane polyester, 10 parts of polyether polyol, 55.5 parts of filler, 20 parts of talc powder, 1 part of fumed silica, and 5 parts of titanium dioxide. The filler is nano-oxide and quartz sand.

[0047] Example 9 An underwater sealing structural adhesive, comprising 20 parts of organosilicon-modified epoxy resin, 15 parts of terminal silane polyester, 12 parts of polyether polyol, 55.5 parts of filler, 20 parts of talc powder, 1 part of fumed silica, and 5 parts of titanium dioxide. The filler is silica powder and quartz sand.

[0048] Example 9 An underwater sealing structural adhesive, comprising 30 parts of organosilicon-modified epoxy resin, 20 parts of terminal silane polyester, 13 parts of polyether polyol, 55 parts of filler, 21 parts of talc powder, 1 part of fumed silica, and 5 parts of titanium dioxide. The filler is silica powder and quartz sand.

[0049] Example 10 A preparation method of an underwater sealing structural adhesive, weighing silicone-modified epoxy resin, terminal silane polyester, polyether polyol, filler, talcum powder, fumed silica, and titanium dioxide according to the proportion in any one of Examples 1-9, adding them to a blender in sequence and stirring for 1-3 hours. After stirring evenly, the underwater sealing structural adhesive is obtained, and the discharged underwater sealing structural adhesive is packaged into a rubber tube.

[0050] Example 11 An application of an underwater sealing structural adhesive, using the above-mentioned underwater sealing structural adhesive to bond the joints in a continuously flowing water canal.

[0051] The joints are the gaps between underwater geomembranes or the gaps between concrete structures or the gaps between concrete structures and geomembranes. That is, the underwater sealing structural adhesive can be used to bond new and old geomembranes in flowing water, and can also be used to bond geomembranes and concrete structures in flowing water, and can also be used to bond the joints of concrete structures in flowing water.

[0052] Specifically, when using the underwater sealing structural adhesive to bond the joints in a continuously flowing water canal, the diver first cleans the gluing surface underwater, then cuts the nozzle of the rubber tube, installs the special glue nozzle worn, then puts on a glass glue gun, and presses the glue gun to apply glue to the gluing surface.

[0053] Preferably, when cleaning the gluing surface, clean the ash layer, silt, and sundries in the water; when applying glue to the gluing surface, press the glue nozzle tightly against the gluing surface, apply glue at least two circles around the repair part, and then press hard on the underwater sealing structural adhesive located between the joints.

[0054] Perform performance testing on the underwater sealing structural adhesive in the above examples. After being tested by the National Building Materials Testing Center of China National Testing & Certification Group Co., Ltd., the test results of the tested items (Items 1-7) of the submitted samples meet the technical requirements of the standard GB16776-2005 "Silicone Structural Sealant for Building", and the test results of the total volatile organic compounds meet the technical requirements of Table 3 of GB30982-2014 "Limit of Hazardous Substances in Building Adhesives" - polysulfide type of body-building building adhesives. The test results are as follows: The first test item is appearance inspection, and the test basis is GB 16776-2005 6.2. The standard requires that the product should be a delicate, uniform paste, without bubbles, lumps, gels, skinning, and no precipitates that are not easily dispersed. The underwater sealing structural adhesive is a delicate, uniform paste, without bubbles, lumps, gels, skinning, and no precipitates that are not easily dispersed.

[0055] The second test item is sag detection, and the test basis is GB 16776-2005 6.3 and GB / T 13477.6-2002 7.1. The standard requirement for the sag of the vertically placed is ≤3mm, and the standard requirement for the sag of the horizontally placed is no deformation. The sag of the underwater sealant when vertically placed is 0, and it does not deform when horizontally placed.

[0056] The third test item is extrudability detection, and the test basis is GB 16776-2005 6.4 and GB / T 13477.3-2002. The standard requirement for extrudability is ≤10s, and the extrudability of the underwater sealant is 3-5s.

[0057] The fourth test item is surface drying time detection, and the test basis is GB / T 13477.5-2002. The standard requirement for the surface drying time is ≤3h, and the surface drying time of the underwater sealant is 2.5-3h.

[0058] The fifth test item is hardness / Shore A detection, and the test basis is GB 16776-2005 6.7 and GB / T531-1999. The standard requirement for hardness / Shore A detection is 20-60, and the hardness / Shore A detection of the underwater sealant is 28-38.

[0059] The sixth test item is tensile bond strength detection, including 23℃ tensile bond strength detection, 23℃ bond failure area detection, elongation at maximum tensile strength at 23℃ detection, tensile modulus at 23℃ with 10% elongation detection, tensile modulus at 23℃ with 20% elongation detection, and tensile modulus at 23℃ with 40% elongation detection, with the test basis being GB 16776-2005 6.8.4 and GB / T13477.8-2002.

[0060] The standard requirement for 23℃ tensile bond strength detection is ≥0.60MPa, and the test result of the underwater sealant is 0.66-0.75MPa.

[0061] The standard requirement for 23℃ bond failure area detection is ≤5%, and the test result of the underwater sealant is 0%.

[0062] The standard requirement for elongation at maximum tensile strength at 23℃ detection is ≥100%, and the test result of the underwater sealant is 170-180%.

[0063] When testing the tensile modulus at an elongation of 10% at 23°C, the tensile modulus at an elongation of 20% at 23°C, and the tensile modulus at an elongation of 40% at 23°C, the test results of the underwater sealing structural adhesive were 0.13 MPa, 0.20 - 0.22 MPa, and 0.36 - 0.37 MPa respectively.

[0064] The 6th test item also respectively includes the tensile bond strength tests at 90°C, -30°C, after immersion in water, and after water-ultraviolet light exposure. The test bases for the tensile bond strength tests under the above various conditions are GB 16776-2005 6.8.5, GB16776-2005 6.8.6, GB 16776-2005 6.8.7, and GB 16776-2005 6.8.8 respectively. The standard requirements for the tensile bond strength tests under the above various conditions are all ≥0.45 MPa. Under the above various conditions, the test results of the tensile bond strength of the underwater sealing structural adhesive were 0.83 - 0.88 MPa, 1.78 - 1.88 MPa, 0.53 - 0.58 MPa, and 0.53 - 0.58 MPa in sequence.

[0065] The 6th test item also respectively includes the bond failure area tests at 90°C, -30°C, after immersion in water, and after water-ultraviolet light exposure. Among them, the test bases for the bond failure area tests at 90°C, -30°C, and after immersion in water are all GB / T 13477.8-2002, and the test base for the bond failure area test after water-ultraviolet light exposure is GB / T 13477.8-2002 and JC / T 485-1992 5.12. The standard requirements for the bond failure area tests under the above various conditions are all ≤5%, and the test results of the bond failure area of the underwater sealing structural adhesive were all 0%.

[0066] The 7th test item is the thermal aging test, including thermogravimetric test, cracking test, and powdering test. The test basis is GB 16776-2005 6.9. The standard requirement for the thermogravimetric test is ≤10%, and the test result of the thermogravimetric test of the underwater sealing structural adhesive was 2.8 - 3.3%. The standard requirements for the cracking and powdering tests are no cracking and no powdering, and the test results of the underwater sealing structural adhesive meet the standards.

[0067] The 8th test item is the total volatile organic compounds test. The test basis is Appendix F of GB 18583-2008, and the standard requirement (Table 3 for body-type building adhesives - polysulfide type) is ≤50. The test result of the underwater sealing structural adhesive was 12.0 - 14.0.

[0068] The above test location is: Guanhongzhuang. The tensile bonding substrate is glass-glass, and the substrate meets the provisions of GB / T13477.1-2002.

[0069] In addition, the underwater sealant structure glue sample was sent to Xi'an Guolian Quality Inspection Technology Co., Ltd. for acute oral toxicity test. The results showed that no poisoning symptoms or deaths were observed in the test animals during the 14-day observation period after exposure to the poison, and the body weights of animals of each gender showed an increasing trend. After the observation period expired, the animals were sacrificed for autopsy, and no abnormalities were found in the organs and tissues. The test conclusion was that the acute oral LD50 of the 24-hour leaching solution of the underwater sealant structure glue sample in water for Kunming mice was > 5000 mg / kg body weight, belonging to actually non-toxic.

[0070] The details not elaborated in the present invention are all conventional technical means well known to those skilled in the art.

[0071] The above content shows and describes the basic principles, main features and beneficial effects of the present invention. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An underwater sealing structural adhesive, characterized in that: It includes 20 - 30 parts of silicone - modified epoxy resin, 10 - 20 parts of terminal - silane polyester, 10 - 15 parts of polyether polyol, 50.5 - 60.5 parts of filler, 15 - 25 parts of talcum powder, 1 part of fumed silica, and 4.5 - 5.5 parts of titanium dioxide.

2. The underwater sealant structure adhesive according to claim 1, wherein: The silicone - modified epoxy resin is 20 parts, the terminal - silane polyester is 10 parts, the polyether polyol is 10 parts, the filler is 50.5 parts, the talcum powder is 15 parts, the fumed silica is 1 part, and the titanium dioxide is 4.5 parts.

3. The underwater sealant structure according to claim 1, characterized in that: The silicone - modified epoxy resin is 30 parts, the terminal - silane polyester is 20 parts, the polyether polyol is 15 parts, the filler is 60.5 parts, the talcum powder is 25 parts, the fumed silica is 1 part, and the titanium dioxide is 5.5 parts.

4. The underwater sealant structure glue according to claim 1, wherein: The silicone - modified epoxy resin is 25 parts, the terminal - silane polyester is 15 parts, the polyether polyol is 12 parts, the filler is 55.5 parts, the talcum powder is 20 parts, the fumed silica is 1 part, and the titanium dioxide is 5 parts.

5. The underwater sealant glue according to any one of claims 1-4, characterized in that: The filler includes silica powder or / and quartz sand or / and nano - oxide.

6. A preparation method of an underwater sealing structural adhesive, characterized in that: Weigh 20 - 30 parts of silicone - modified epoxy resin, 10 - 20 parts of terminal - silane polyester, 10 - 15 parts of polyether polyol, 50.5 - 60.5 parts of filler, 15 - 25 parts of talcum powder, 1 part of fumed silica, and 4.5 - 5.5 parts of titanium dioxide in proportion, and add them into a mixer and stir for 1 - 3 hours in sequence. After stirring evenly, we get the underwater sealing structural adhesive, and then pack the discharged underwater sealing structural adhesive into a rubber tube.

7. Application of an underwater sealant structural adhesive, characterized in that: Use the underwater sealing structural adhesive described in Claim 6 to bond the joints in the non - stop - water canal.

8. The application of the underwater sealant structural adhesive according to claim 7, wherein: The joints are the gaps between underwater geomembranes or the gaps between concrete structures or the gaps between concrete structures and geomembranes.

9. The application of the underwater sealant structural adhesive according to claim 7, characterized in that: When using the underwater sealing structural adhesive to bond the joints in the non - stop - water canal, the diver first cleans the gluing surface underwater, then cuts the nozzle of the rubber tube, installs the special glue nozzle worn, then puts on a glass glue gun, and presses the glue gun to apply glue to the gluing surface.

10. The application of the underwater sealant structural adhesive according to claim 9, characterized in that: When cleaning the gluing surface, clean the ash layer, silt, and sundries in the water; when applying glue to the gluing surface, press the glue nozzle tightly against the gluing surface, apply glue at least two circles around the repair part, and then press hard on the underwater sealing structural adhesive located between the joints.