Mining air duct rapid repairing adhesive and repairing method thereof

Abstract

The invention discloses a mine air duct rapid repairing adhesive and a repairing method thereof, and relates to the technical field of air duct repairing adhesives used in underground coal mines. The quick repairing adhesive for the air duct is prepared from N210 type polyether polyol, N220 type polyether polyol, 330N type polyether polyol, MA-018 type polyether polyol, dimethyl thio-toluenediamine, 1, 2, 4-trimethyl-1, 3-pentanediol, 1, 3, 4-trimethyl-1, 3-pentanediol, 1, 3, 4-trimethyl-1, 3-pentanediol, 1, 3, 4- the component A is composed of 1, 4-butanediol, a flame retardant, a catalyst, a composite catalyst, an antistatic agent and a defoaming agent, and the component B is composed of N220 type polyether polyol, N210 type polyether polyol, polytetrahydrofuran glycol, diisocyanate, polyphenyl polymethylene polyisocyanate, a flame retardant, a defoaming agent and an antistatic agent. The component A and the component B are rapidly mixed and evenly stirred at normal temperature according to the volume ratio of 1: 1, the surface of a bonded base material is coated with the mixture, then the patch is attached to the base material and pressed for about 10 minutes and 30-45 minutes, bonding and curing are completed, the patch can be operated with wind on site without shutdown, the working life is appropriate, effective repairing measures are provided for rapid repairing of an underground coal mine air duct and reutilization of a damaged coal mine air duct, and the repairing cost is reduced. And the use cost of the air duct is reduced.

Description

Technical Field

[0001] This invention relates to the field of adhesives for repairing ventilation ducts in underground coal mines, and particularly to a rapid repair adhesive for mine ventilation ducts and its repair method. Background Technology

[0002] Coal mine production requires personnel and a continuous supply of oxygen. Mine ventilation introduces fresh air into the mine, increasing oxygen concentration. Secondly, during underground production, toxic and harmful gases such as carbon monoxide, carbon dioxide, nitrogen dioxide, sulfur dioxide, hydrogen sulfide, and methane are constantly released from the coal seam. These gases require the continuous supply of fresh air through ventilation ducts to dilute and expel them. Fine dust is also generated during production; concentrated dust can cause explosions. Mine ventilation reduces dust concentration, ensuring safe production. Furthermore, underground conditions, such as temperature and humidity, require regulation to mitigate harsh underground weather conditions, creating a favorable working environment. Therefore, mine ventilation is the most fundamental aspect of underground coal mine production, holding a crucial position throughout mine construction and production, and is essential for creating a safer and better working environment.

[0003] Ventilation ducts are essential equipment for underground ventilation, and they come in different diameters, specifications, and materials. Underground ventilation ducts are used continuously 24 hours a day. They are affected by the underground environment, such as equipment pressure and scratches from tools, which can cause damage. Damaged ducts need to be repaired promptly; otherwise, the holes will widen, causing a short circuit in the fresh air supply. Currently, most duct repairs use single-component adhesives such as chloroprene and styrene-butadiene, dissolved in gasoline, toluene, and xylene. The advantage is a long pot life, meaning a longer repair time. The disadvantage is that curing takes more than 12 hours, making it unsuitable for on-site ventilation work. Epoxy adhesive is a commonly used type of adhesive, possessing advantages such as high strength, strong adhesion, and strong water resistance. For high-strength equipment like ventilation ducts, epoxy adhesive is a good choice. However, it should be noted that epoxy adhesive cures relatively slowly, requiring a considerable amount of time to achieve the desired curing effect. Currently, coal mines also use a type of adhesive called 401 glue as a duct bonding agent. Its bonding and curing speed is extremely fast, curing in just over 20 seconds. Once it comes into contact with skin or clothing, it quickly bonds. If it accidentally gets on fingers, it will not only cause pain when separating but may also damage the skin. If it splashes into the eyes, it can cause serious damage and even affect vision. The volatile gases it releases contain chemicals; in the confined environment of a mine, inhaling these gases can irritate the respiratory tract, causing coughing, wheezing, and other discomfort. Long-term exposure may also affect health. Because this glue cures so quickly, the limited time available for application means that if the bonding position is not quickly and accurately located, it is difficult to adjust, potentially leading to misalignment and affecting the bonding effect. Some duct adhesives use nitrile rubber dissolved in acetone, methyl ethyl ketone (MEK), or toluene. However, due to the use of solvents, these adhesives suffer from slow curing speeds, high VOC levels due to the organic solvent content, unsafe use in mines, and unsatisfactory application results. There is also a repair method using adhesive tape. This method is quick to bond and repair, but the bonding strength is low. It is very easy to fall off due to the air pressure inside the duct, and the effect is poor. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies in the rapid repair of ventilation ducts by providing a rapid repair adhesive for mine ventilation ducts.

[0005] Another objective of this invention is to provide a method for preparing a repair adhesive and a repair method.

[0006] The technical solution adopted in this invention is: a quick repair adhesive for mine ventilation ducts, comprising component A and component B, wherein components A and B are expressed in parts by weight as follows: Component A includes: 28-30 parts of N210 type polyether polyol, 18-20 parts of N220 type polyether polyol, 10-12 parts of 330N type polyether polyol, 6-8 parts of MA-018 type polyether polyol, 5-7 parts of dimethyl thiotoluene diamine, 4-6 parts of 1,4-butanediol, 34-36 parts of flame retardant, 0.2-0.4 parts of catalyst, 0.2-0.4 parts of composite catalyst, 1.5-2.5 parts of antistatic agent, and 0.6-1.0 parts of defoamer; Component B includes: 40-43 parts of N220 type polyether polyol, 5-7 parts of N210 type polyether polyol, 2-4 parts of polytetrahydrofuran ether diol, 37-38 parts of diisocyanate, 13-14 parts of polyphenyl polymethylene polyisocyanate, 11-15 parts of flame retardant, 0.5-1.0 parts of defoamer, and 0.3-0.5 parts of antistatic agent.

[0007] The specific preparation method of the quick repair adhesive for mine ventilation ducts includes the following steps: Step 1: Prepare component A The preparation process of component A is as follows: First, add 28-30 parts of N210 polyether polyol, 18-20 parts of N220 polyether polyol, 10-12 parts of 330N polyether polyol, and 6-8 parts of MA-018 type polyether polyol to a mixing vessel and stir until homogeneous. Then, add 5-7 parts of dimethyl thiotoluene diamine, 4-6 parts of 1,4-butanediol, and 34-36 parts of flame retardant to the mixing vessel and stir until homogeneous. Finally, add 0.2-0.4 parts of catalyst, 0.2-0.4 parts of composite catalyst, 1.5-2.5 parts of antistatic agent, and 0.6-1.0 parts of defoamer to the mixing vessel and stir until homogeneous. Then, maintain a vacuum of 0.08-0.09 MPa and degas for 5-10 minutes. When no bubbles are present, pour the transparent liquid into a container, fill it with high-purity nitrogen, seal it at room temperature, and store it to obtain component A. The second step is to prepare component B. The preparation process of component B is as follows: Place 40-43 parts of N220 type polyether polyol, 5-7 parts of N210 type polyether polyol, and 2-4 parts of polytetrahydrofuran ether diol in a reaction vessel. Maintain a vacuum of 0.08-0.09 MPa at 120°C for 1 hour to dehydrate the mixture. Then cool the mixture to about 43°C. Add 37-38 parts of diisocyanate to the reaction vessel and control the reaction temperature at 55±2°C for 45 minutes. Then raise the temperature to 82±2°C and react for 2 hours. After the reaction, cool the reactants to room temperature. Add 13-14 parts of polyphenyl polymethylene polyisocyanate, 11-15 parts of flame retardant, 0.5-1.0 parts of defoamer, and 0.3-0.5 parts of antistatic agent to the reaction vessel and mix thoroughly. Maintain a vacuum of 0.08-0.09 MPa and degas for 5-10 minutes. When no bubbles are present, pour the transparent liquid into a container, fill it with high-purity nitrogen, seal it at room temperature, and store it to obtain component B. The third step is the preparation of the quick repair adhesive for mine ventilation ducts. Mix component A and component B at a volume ratio of 1:1 and stir rapidly at room temperature for about 30 seconds to obtain a quick repair adhesive for mine ventilation ducts.

[0008] The N210 type polyether polyol, N220 type polyether polyol, 330N type polyether polyol, dimethylthiotoluene diamine, and 1,4-butanediol mentioned are all commercially available industrial products. The polytetrahydrofuran ether diol is a commercially available industrial product with a relative molecular mass of 2000. The MA-018 type polyether polyol is a bisphenol A polyether polyol with a hydroxyl value of 260-300 mgKOH / g, produced by Maizhen Polymer New Materials (Shanghai) Co., Ltd. The diisocyanate is either MDI-50 or liquefied MDI-100L, with a -NCO content of 28% to 30%, and is produced by Yantai Wanhua Chemical Group. The polyphenyl polymethylene polyisocyanate is PM200 type polyphenyl polymethylene polyisocyanate with a -NCO content of 30.5% to 32% by mass, produced by Yantai Wanhua Chemical Group; The flame retardant is one or two of tri(2-chloroethyl) phosphate, tri(1-chloro-2-propyl) phosphate or triethyl phosphate flame retardant, preferably tri(2-chloroethyl) phosphate, all of which are commercially available premium-grade industrial products; The catalyst is any one of CUCAT-H, CUCAT-8 or CUCAT-A, and is produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The composite catalyst is a BX-1124 type composite post-curing catalyst, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The antistatic agent is any one or two of CUCE-W, JLWT-1, JLWT-2, and E-6019AR antistatic agents, preferably CUCE-W antistatic agent, which is produced by Guangzhou Yourun Synthetic Materials Co., Ltd., JLWT-1 and JLWT-2 antistatic agents are produced by Shandong Juli Antistatic Technology Co., Ltd., and E-6019AR antistatic agent is produced by Dongguan Fiat Antistatic Technology Co., Ltd. The defoamer is of type YPXP-07A, BYK-1790, BYK-1799, or BYK-501, with YPXP-07A being preferred. It is manufactured by Guangzhou Yourun Synthetic Materials Co., Ltd., while BYK-1790, BYK-1799, and BYK-501 are distributed by BYK-Sien GmbH of Germany.

[0009] The repair method of the quick repair adhesive for mine ventilation ducts of this invention includes the following specific repair steps: First, take a patch and use sandpaper to sand the area around the damaged air duct opening and the surface of the patch. After sanding, clean the debris from the air duct opening and the surface of the patch with a brush. The surface should be free of moisture. The sanding area should be slightly larger than the area to be repaired. The second step is to mix component A and component B at a volume ratio of 1:1, stir rapidly at room temperature for about 30 seconds, and quickly apply the mixture to the damaged duct fabric. After spreading it evenly, attach the patch to the damaged area, and then quickly remove any air bubbles between the patch and the original duct fabric using pressure. Ensure that both the surface of the duct fabric being repaired and the surface of the patch are covered with adhesive, without leaving any voids. Complete the operation within 3 to 4 minutes, with an adhesive thickness of 0.3 to 0.4 mm. Ensure that the machine is running and the air is being supplied without interrupting the operation. The third step is to press the patch firmly over the entire area for about 10 minutes. After 30 to 45 minutes, the patch will be firmly bonded to the original duct fabric substrate, and the repair will be completed.

[0010] Compared with existing repair techniques, the present invention has the following advantages: 1. This invention provides a highly adaptable, fast-curing, easy-to-use, solvent-free polyurethane duct quick-repair adhesive. At room temperature, the mixed adhesive is applied to the surface of the substrate to be bonded, then the patch is attached to the substrate and pressed for approximately 10 minutes. Bonding and curing are complete in 30–45 minutes.

[0011] 2. The adhesive of this invention has a reasonable pot life, is easy for personnel to operate, and provides strong adhesion for repair layers. A 0.3mm-0.4mm thick adhesive layer with an additional patch can effectively enhance the wind pressure resistance and tear resistance of the ductwork breach. The use of the BX-1124 composite catalyst features a slow initial catalytic reaction and a fast later catalytic reaction, resulting in good flowability of the mixed adhesive in the early stages, facilitating repair operations, and rapid curing in the later stages, shortening the adhesive curing time.

[0012] 3. The combined use of MA-018 bisphenol A type polyether polyol, polytetrahydrofuran ether diol, MDI-50, liquefied MDI-100L, and PM200 isocyanate imparts good adhesion, flexibility, and mechanical properties to the adhesive layer.

[0013] 4. On-site repair operations can be carried out without stopping the ventilation fan, providing an effective repair measure for the rapid repair of underground ventilation ducts in coal mines and the reuse of damaged ventilation ducts in coal mines, greatly reducing the cost of using ventilation ducts and improving production efficiency.

[0014] 5. This quick-repair adhesive for ventilation ducts does not use any organic solvents, has low VOCs, and possesses excellent flame retardancy and antistatic properties. It meets the requirements for polymer materials used in underground coal mines, is environmentally friendly, and poses no harm to operators.

[0015] 6. Polyurethane adhesive is an excellent type of adhesive, possessing advantages such as being solvent-free, having high strength, high toughness, strong chemical resistance, and a suitable and adjustable curing reaction speed. For applications requiring high strength in bonding and repairing air duct equipment, polyurethane adhesive is a very good choice. Detailed Implementation Example

[0017] This embodiment provides a quick-repair adhesive for mine ventilation ducts, comprising component A and component B by weight, wherein... Component A includes: 28 parts of N210 type polyether polyol, 18 parts of N220 type polyether polyol, 10 parts of 330N type polyether polyol, 6 parts of MA-018 type polyether polyol, 5 parts of dimethyl thiotoluene diamine, 4 parts of 1,4-butanediol, 34 parts of tris(2-chloroethyl) phosphate flame retardant, 0.2 parts of CUCAT-H catalyst, 0.2 parts of BX-1124 type composite catalyst, 1.5 parts of CUCE-W type antistatic agent, and 0.6 parts of BYK-1790 type defoamer.

[0018] Component B includes: 40 parts of N220 type polyether polyol, 5 parts of N210 type polyether polyol, 2 parts of polytetrahydrofuran ether diol, 37 parts of MDI-50 type diisocyanate, 13 parts of polyphenyl polymethylene polyisocyanate, 11 parts of tri(1-chloro-2-propyl) phosphate flame retardant, 0.5 parts of YPXP-07A type defoamer, and 0.3 parts of JLWT-1 type antistatic agent.

[0019] The specific preparation method of the quick repair adhesive for mine ventilation ducts includes the following steps: Step 1: Prepare component A The preparation process of component A is as follows: First, add 28 parts of N210 polyether polyol, 18 parts of N220 polyether polyol, 10 parts of 330N polyether polyol, and 6 parts of MA-018 polyether polyol to a mixing vessel and stir until homogeneous. Then, add 5 parts of dimethylthiotoluene diamine, 4 parts of 1,4-butanediol, and 34 parts of tris(2-chloroethyl) phosphate flame retardant to the mixing vessel and stir until homogeneous. Finally, add 0.2 parts of CUCAT-H catalyst, 0.2 parts of BX-1124 composite catalyst, 1.5 parts of CUCE-W antistatic agent, and 0.6 parts of BYK-1790 defoamer to the mixing vessel and stir further until homogeneous. Then, maintain a vacuum of 0.08–0.09 MPa and degas for 5–10 minutes. When no bubbles are present, pour the transparent liquid into a container, fill it with high-purity nitrogen, seal it at room temperature, and store it to obtain component A.

[0020] The second step is to prepare component B. The preparation process of component B is as follows: 40 parts of N220 type polyether polyol, 5 parts of N210 type polyether polyol, and 2 parts of polytetrahydrofuran ether diol were placed in a reactor. The reactor was dehydrated under vacuum at 120°C and a pressure of 0.08–0.09 MPa for 1 hour. The mixture was then cooled to approximately 43°C. 37 parts of MDI-50 type diisocyanate were then added to the reactor, and the reaction was carried out at 55±2°C for 45 minutes. The temperature was then increased to 82±2°C and the reaction was continued for 2 hours. After the reaction was completed... The reactants were cooled to room temperature. Then, 13 parts of polyphenyl polymethylene polyisocyanate, 11 parts of tri(1-chloro-2-propyl) phosphate flame retardant, 0.5 parts of YPXP-07A type defoamer, and 0.3 parts of JLWT-1 type antistatic agent were added to the reaction vessel and mixed and stirred. The vacuum degree was maintained at 0.08-0.09 MPa for 5-10 minutes to degas. When no bubbles were found, the transparent liquid was poured into a container, filled with high-purity nitrogen, sealed and stored at room temperature to obtain component B.

[0021] The third step is the preparation of the quick repair adhesive for mine ventilation ducts. Mix component A and component B at a volume ratio of 1:1 and stir rapidly at room temperature for about 30 seconds to obtain a quick repair adhesive for mine ventilation ducts.

[0022] The N210 type polyether polyol, N220 type polyether polyol, 330N type polyether polyol, dimethylthiotoluene diamine, and 1,4-butanediol mentioned are all commercially available industrial products. The polytetrahydrofuran ether diol is a commercially available industrial product with a relative molecular mass of 2000. The MA-018 type polyether polyol is a bisphenol A polyether polyol with a hydroxyl value of 260-300 mgKOH / g, produced by Maizhen New Materials (Shanghai) Co., Ltd. The diisocyanate is MDI-50 type diisocyanate with -NCO content of 28-30% by mass, produced by Yantai Wanhua Chemical Group. The polyphenyl polymethylene polyisocyanate is PM200 type polyphenyl polymethylene polyisocyanate with a -NCO content of 30.5% to 32% by mass, produced by Yantai Wanhua Chemical Group; The flame retardant is tris(2-chloroethyl) phosphate, and the flame retardant tris(1-chloro-2-propyl) phosphate is a commercially available premium-grade industrial product; The catalyst is CUCAT-H, which is produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The composite catalyst is a BX-1124 type composite post-curing catalyst, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The antistatic agent is a CUCE-W type antistatic agent, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The JLWT-1 type antistatic agent is produced by Shandong Juli Antistatic Technology Co., Ltd. The defoamer is BYK-1790 type defoamer, which is distributed by BYK S.A. in Germany; the YPXP-07A type defoamer is produced by Guangzhou Yourun Synthetic Materials Co., Ltd.

[0023] The repair method using the quick-repair adhesive for mine ventilation ducts includes the following specific repair steps: First, take a patch and use sandpaper to sand the area around the damaged air duct opening and the surface of the patch. After sanding, clean the debris on the air duct opening and the surface of the patch with a brush. The surface must not be wet. The sanding area should be slightly larger than the area of ​​the damaged opening to be repaired. The second step is to mix component A and component B at a volume ratio of 1:1, stir rapidly at room temperature for about 30 seconds, and quickly apply the mixture to the damaged air duct fabric. After spreading it evenly, attach the patch to the damaged area, and then quickly remove any air bubbles between the patch and the original air duct fabric using pressure. Ensure that both the surface of the air duct fabric being repaired and the surface of the patch are covered with adhesive, without leaving any voids. The operation should be completed within 3 to 4 minutes, with an adhesive thickness of 0.3 to 0.4 mm. This operation can be performed on-site without shutting down the machine and while the air is running. The third step is to press the patch firmly over the entire area for about 10 minutes. After 30 to 45 minutes, the patch will be firmly bonded to the original duct fabric substrate, and the repair will be completed.

[0024] Example 2 This embodiment provides a quick-repair adhesive for mine ventilation ducts, comprising component A and component B by weight, wherein... Component A includes: 30 parts of N210 type polyether polyol, 20 parts of N220 type polyether polyol, 12 parts of 330N type polyether polyol, 8 parts of MA-018 type polyether polyol, 7 parts of dimethyl thiotoluene diamine, 6 parts of 1,4-butanediol, 36 parts of tris(2-chloroethyl) phosphate flame retardant, 0.4 parts of CUCAT-8 catalyst, 0.4 parts of BX-1124 type composite catalyst, 2.5 parts of E-6019AR type antistatic agent, and 1.0 part of BYK-1799 type defoamer.

[0025] Component B includes: 43 parts of N220 type polyether polyol, 7 parts of N210 type polyether polyol, 4 parts of polytetrahydrofuran ether diol, 38 parts of liquefied MDI-100L type diisocyanate, 14 parts of polyphenyl polymethylene polyisocyanate, 15 parts of tris(2-chloroethyl) phosphate flame retardant, 1.0 part of BYK-1799 type defoamer, and 0.5 parts of E-6019AR type antistatic agent.

[0026] The specific preparation method of the quick repair adhesive for mine ventilation ducts includes the following steps: Step 1: Prepare component A The preparation process of component A is as follows: First, add 30 parts of N210 polyether polyol, 20 parts of N220 polyether polyol, 12 parts of 330N polyether polyol, and 8 parts of MA-018 polyether polyol to a mixing vessel and stir until homogeneous. Then, add 7 parts of dimethyl thiotoluene diamine, 6 parts of 1,4-butanediol, and 36 parts of tris(2-chloroethyl) phosphate flame retardant to the mixing vessel and stir until homogeneous. Finally, add 0.4 parts of CUCAT-8 catalyst, 0.4 parts of BX-1124 composite catalyst, 2.5 parts of E-6019AR antistatic agent, and 1.0 part of BYK-1799 defoamer to the mixing vessel and stir until homogeneous. Then, maintain a vacuum of 0.08–0.09 MPa and degas for 5–10 minutes. When no bubbles are present, pour the transparent liquid into a container, fill it with high-purity nitrogen, seal it at room temperature, and store it to obtain component A.

[0027] The second step is to prepare component B. The preparation process of component B is as follows: 43 parts of N220 type polyether polyol, 7 parts of N210 type polyether polyol, and 4 parts of polytetrahydrofuran ether diol were placed in a reactor. The reactor was dehydrated under vacuum at 120°C and a pressure of 0.08–0.09 MPa for 1 hour. Then, the reactor was cooled to approximately 43°C. Next, 38 parts of liquefied MDI-100L type diisocyanate were added to the reactor. The reaction temperature was controlled at 55±2°C for 45 minutes. The temperature was then raised to 82±2°C and the reaction was continued for 2 hours. The reaction was completed. After the reaction mixture is cooled to room temperature, 14 parts of polyphenyl polymethylene polyisocyanate, 15 parts of tris(2-chloroethyl) phosphate flame retardant, 1.0 part of BYK-1799 type defoamer, and 0.5 parts of E-6019AR type antistatic agent are added to the reaction vessel and mixed and stirred. Then, the vacuum degree is maintained at 0.08-0.09 MPa for 5-10 minutes for degassing. When there are no bubbles, the transparent liquid is poured into a bucket, filled with high-purity nitrogen, sealed and stored at room temperature to obtain component B.

[0028] The third step is the preparation of the quick repair adhesive for mine ventilation ducts. Mix component A and component B at a volume ratio of 1:1 and stir rapidly at room temperature for about 30 seconds to obtain a quick repair adhesive for mine ventilation ducts.

[0029] The N210 type polyether polyol, N220 type polyether polyol, 330N type polyether polyol, dimethylthiotoluene diamine, and 1,4-butanediol mentioned are all commercially available industrial products. The polytetrahydrofuran ether diol is a commercially available industrial product with a relative molecular mass of 2000. The MA-018 type polyether polyol is a bisphenol A polyether polyol with a hydroxyl value of 260-300 mgKOH / g, produced by Maizhen New Materials (Shanghai) Co., Ltd. The diisocyanate is a liquefied MDI-100L type diisocyanate with an -NCO mass content of 28-30%, produced by Yantai Wanhua Chemical Group. The polyphenyl polymethylene polyisocyanate is PM200 type polyphenyl polymethylene polyisocyanate with a -NCO content of 30.5% to 32% by mass, produced by Yantai Wanhua Chemical Group; The flame retardant is tris(2-chloroethyl) phosphate, a commercially available premium-grade industrial product; The catalyst is a CUCAT-8 type catalyst, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The composite catalyst is a BX-1124 type composite post-curing catalyst, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The antistatic agent is E-6019AR type antistatic agent, which is produced by Dongguan Fiat Static Electricity Technology Co., Ltd. The defoamer is BYK-1799, distributed by BYK S.A. of Germany.

[0030] The repair method using the quick-repair adhesive for mine ventilation ducts includes the following specific repair steps: First, take a patch and use sandpaper to sand the area around the damaged air duct opening and the surface of the patch. After sanding, clean the debris on the air duct opening and the surface of the patch with a brush. The surface must not be wet. The sanding area should be slightly larger than the area of ​​the damaged opening to be repaired. The second step is to mix component A and component B at a volume ratio of 1:1, stir rapidly at room temperature for about 30 seconds, and quickly apply the mixture to the damaged air duct fabric. After spreading it evenly, attach the patch to the damaged area, and then quickly remove any air bubbles between the patch and the original air duct fabric using pressure. Ensure that both the surface of the air duct fabric being repaired and the surface of the patch are covered with adhesive, without leaving any voids. The operation should be completed within 3 to 4 minutes, with an adhesive thickness of 0.3 to 0.4 mm. This operation can be performed on-site without shutting down the machine and while the air is running. The third step is to press the patch firmly over the entire area for about 10 minutes. After 30 to 45 minutes, the patch will be firmly bonded to the original duct fabric substrate, and the repair will be completed.

[0031] Example 3 This embodiment provides a quick-repair adhesive for mine ventilation ducts, comprising component A and component B by weight, wherein... Component A includes: 29 parts of N210 type polyether polyol, 19 parts of N220 type polyether polyol, 11 parts of 330N type polyether polyol, 7 parts of MA-018 type polyether polyol, 6 parts of dimethyl thiotoluene diamine, 5 parts of 1,4-butanediol, 35 parts of tris(2-chloroethyl) phosphate flame retardant, 0.3 parts of CUCAT-H catalyst, 0.3 parts of BX-1124 type composite catalyst, 2.0 parts of JLWT-1 type antistatic agent, and 0.8 parts of YPXP-07A type defoamer.

[0032] Component B includes: 42 parts of N220 type polyether polyol, 6 parts of N210 type polyether polyol, 3 parts of polytetrahydrofuran ether diol, 37 parts of liquefied MDI-100L type diisocyanate, 13 parts of polyphenyl polymethylene polyisocyanate, 14 parts of triethyl phosphate flame retardant, 0.7 parts of BYK-1799 type defoamer, and 0.4 parts of JLWT-2 type antistatic agent.

[0033] The specific preparation method of the quick repair adhesive for mine ventilation ducts includes the following steps: Step 1: Prepare component A The preparation process of component A is as follows: First, add 29 parts of N210 polyether polyol, 19 parts of N220 polyether polyol, 11 parts of 330N polyether polyol, and 7 parts of MA-018 polyether polyol to a mixing vessel and stir until homogeneous. Then, add 6 parts of dimethylthiotoluene diamine, 5 parts of 1,4-butanediol, and 35 parts of tris(2-chloroethyl) phosphate flame retardant to the mixing vessel and stir until homogeneous. Finally, add 0.3 parts of CUCAT-H catalyst, 0.3 parts of BX-1124 composite catalyst, 2.0 parts of JLWT-1 antistatic agent, and 0.8 parts of YPXP-07A defoamer to the mixing vessel and stir until homogeneous. Then, maintain a vacuum of 0.08–0.09 MPa and degas for 5–10 minutes. When no bubbles are present, pour the transparent liquid into a container, fill it with high-purity nitrogen, seal it at room temperature, and store it to obtain component A.

[0034] The second step is to prepare component B. The preparation process of component B is as follows: 42 parts of N220 type polyether polyol, 6 parts of N210 type polyether polyol, and 3 parts of polytetrahydrofuran ether diol were placed in a reaction vessel. The vessel was dehydrated under vacuum at 120°C and a pressure of 0.08–0.09 MPa for 1 hour. Then, the mixture was cooled to approximately 43°C. Next, 37 parts of liquefied MDI-100L type diisocyanate were added to the reaction vessel. The reaction temperature was controlled at 55±2°C for 45 minutes, and then the temperature was raised to 82±2°C for another 2 hours. After the reaction is complete, the reactants are cooled to room temperature. Then, 13 parts of polyphenyl polymethylene polyisocyanate, 14 parts of triethyl phosphate flame retardant, 0.7 parts of BYK-1799 defoamer, and 0.4 parts of JLWT-2 antistatic agent are added to the reaction vessel and mixed evenly. Then, the vacuum degree is maintained at 0.08-0.09 MPa for 5-10 minutes for degassing. When there are no bubbles, the transparent liquid is poured into a container, filled with high-purity nitrogen, sealed and stored at room temperature to obtain component B.

[0035] The third step is the preparation of the quick repair adhesive for mine ventilation ducts. Mix component A and component B at a volume ratio of 1:1 and stir rapidly at room temperature for about 30 seconds to obtain a quick repair adhesive for mine ventilation ducts.

[0036] The N210 type polyether polyol, N220 type polyether polyol, 330N type polyether polyol, dimethylthiotoluene diamine, and 1,4-butanediol mentioned are all commercially available industrial products. The polytetrahydrofuran ether diol is a commercially available industrial product with a relative molecular mass of 2000. The MA-018 type polyether polyol is a bisphenol A polyether polyol with a hydroxyl value of 260-300 mgKOH / g, produced by Maizhen New Materials (Shanghai) Co., Ltd. The diisocyanate is a liquefied MDI-100L type diisocyanate with an -NCO mass content of 28-30%, produced by Yantai Wanhua Chemical Group. The polyphenyl polymethylene polyisocyanate is PM200 type polyphenyl polymethylene polyisocyanate with a -NCO content of 30.5% to 32% by mass, produced by Yantai Wanhua Chemical Group; The flame retardant is tris(2-chloroethyl) phosphate (TCEP), and the flame retardant is a commercially available premium-grade industrial product; The catalyst is a CUCAT-H type catalyst, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The composite catalyst is a BX-1124 type composite post-curing catalyst, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The antistatic agent is JLWT-1 or JLWT-2 type antistatic agent, which is produced by Shandong Juli Antistatic Technology Co., Ltd. The defoamer is YPXP-07A type defoamer, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The BYK-1799 defoamer is distributed by BYK-1799 GmbH, Germany.

[0037] The repair method of the quick repair adhesive for the mine ventilation duct is the same as in Example 3.

[0038] Example 4 This embodiment provides a quick-repair adhesive for mine ventilation ducts, comprising component A and component B by weight, wherein... Component A includes: 30 parts of N210 type polyether polyol, 18 parts of N220 type polyether polyol, 12 parts of 330N type polyether polyol, 6 parts of MA-018 type polyether polyol, 7 parts of dimethyl thiotoluene diamine, 4 parts of 1,4-butanediol, 36 parts of tris(2-chloroethyl) phosphate flame retardant, 0.2 parts of CUCAT-A type catalyst, 0.4 parts of BX-1124 type composite catalyst, 1.5 parts of CUCE-W type antistatic agent, and 1.0 part of BYK-50 type defoamer.

[0039] Component B includes: 40 parts of N220 type polyether polyol, 7 parts of N210 type polyether polyol, 2 parts of polytetrahydrofuran ether diol, 38 parts of liquefied MDI-100L type diisocyanate, 13 parts of polyphenyl polymethylene polyisocyanate, 15 parts of tris(2-chloroethyl) phosphate flame retardant, 0.5 parts of BYK-50 type defoamer, and 0.5 parts of CUCE-W type antistatic agent.

[0040] The specific preparation method of the quick repair adhesive for mine ventilation ducts includes the following steps: Step 1: Prepare component A The preparation process of component A is as follows: First, add 30 parts of N210 polyether polyol, 18 parts of N220 polyether polyol, 12 parts of 330N polyether polyol, and 6 parts of MA-018 polyether polyol to a mixing vessel and stir until homogeneous. Then, add 7 parts of dimethylthiotoluene diamine, 4 parts of 1,4-butanediol, and 36 parts of tris(2-chloroethyl) phosphate flame retardant to the mixing vessel and stir until homogeneous. Finally, add 0.2 parts of CUCAT-A catalyst, 0.4 parts of BX-1124 composite catalyst, 1.5 parts of CUCE-W antistatic agent, and 1.0 part of BYK-50 defoamer to the mixing vessel and stir further until homogeneous. Then, maintain a vacuum of 0.08–0.09 MPa and degas for 5–10 minutes. When no bubbles are present, pour the transparent liquid into a container, fill it with high-purity nitrogen, seal it at room temperature, and store it to obtain component A.

[0041] The second step is to prepare component B. The preparation process of component B is as follows: 40 parts of N220 type polyether polyol, 7 parts of N210 type polyether polyol, and 2 parts of polytetrahydrofuran ether diol were placed in a reactor. The reactor was dehydrated under vacuum at 120°C and a pressure of 0.08–0.09 MPa for 1 hour. The mixture was then cooled to approximately 43°C. 38 parts of liquefied MDI-100L type diisocyanate were then added to the reactor. The reaction temperature was controlled at 55±2°C for 45 minutes. The temperature was then raised to 82±2°C and the reaction continued for 2 hours. After the reaction is completed, the reactants are cooled to room temperature. Then, 13 parts of polyphenyl polymethylene polyisocyanate, 15 parts of tris(2-chloroethyl) phosphate flame retardant, 0.5 parts of BYK-50 type defoamer, and 0.5 parts of CUCE-W type antistatic agent are added to the reaction vessel and mixed and stirred. Then, the vacuum degree is maintained at 0.08-0.09 MPa for 5-10 minutes for degassing. When there are no bubbles, the transparent liquid is poured into a bucket, filled with high-purity nitrogen, sealed and stored at room temperature to obtain component B.

[0042] The third step is the preparation of the quick repair adhesive for mine ventilation ducts. Mix component A and component B at a volume ratio of 1:1 and stir rapidly at room temperature for about 30 seconds to obtain a quick repair adhesive for mine ventilation ducts.

[0043] The N210 type polyether polyol, N220 type polyether polyol, 330N type polyether polyol, dimethylthiotoluene diamine, and 1,4-butanediol mentioned are all commercially available industrial products. The polytetrahydrofuran ether diol is a commercially available industrial product with a relative molecular mass of 2000. The MA-018 type polyether polyol is a bisphenol A polyether polyol with a hydroxyl value of 260-300 mgKOH / g, produced by Maizhen New Materials (Shanghai) Co., Ltd. The diisocyanate is a liquefied MDI-100L type diisocyanate with an -NCO mass content of 28-30%, produced by Yantai Wanhua Chemical Group. The polyphenyl polymethylene polyisocyanate is PM200 type polyphenyl polymethylene polyisocyanate with a -NCO content of 30.5% to 32% by mass, produced by Yantai Wanhua Chemical Group; The flame retardant is tris(2-chloroethyl) phosphate, a commercially available premium-grade industrial product; The catalyst is a CUCAT-A type catalyst, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The composite catalyst is a BX-1124 type composite post-curing catalyst, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The antistatic agent is a CUCE-W type antistatic agent, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The defoamer is BYK-50 type defoamer, which is distributed by BYK S.A. in Germany; The repair method of the quick repair adhesive for the mine ventilation duct is the same as in Example 3.

[0044] Example 5 This embodiment provides a quick-repair adhesive for mine ventilation ducts, comprising component A and component B by weight, wherein... Component A includes: 29 parts of N210 type polyether polyol, 20 parts of N220 type polyether polyol, 11 parts of 330N type polyether polyol, 7 parts of MA-018 type polyether polyol, 7 parts of dimethyl thiotoluene diamine, 5 parts of 1,4-butanediol, 35 parts of tri(1-chloro-2-propyl) phosphate flame retardant, 0.3 parts of CUCAT-H type catalyst, 0.4 parts of BX-1124 type composite catalyst, 2.3 parts of CUCE-W type antistatic agent, and 0.9 parts of YPXP-07A type defoamer.

[0045] Component B includes: 43 parts of N220 type polyether polyol, 6 parts of N210 type polyether polyol, 4 parts of polytetrahydrofuran ether diol, 38 parts of MDI-50 type diisocyanate, 12 parts of polyphenyl polymethylene polyisocyanate, 13 parts of tris(2-chloroethyl) phosphate flame retardant, 0.7 parts of BYK-1799 type defoamer, and 0.4 parts of CUCE-W type antistatic agent.

[0046] The specific preparation method of the quick repair adhesive for mine ventilation ducts includes the following steps: Step 1: Prepare component A The preparation process of component A is as follows: First, add 29 parts of N210 polyether polyol, 20 parts of N220 polyether polyol, 11 parts of 330N polyether polyol, and 7 parts of MA-018 polyether polyol to a mixing vessel and stir until homogeneous. Then, add 7 parts of dimethyl thiotoluene diamine, 5 parts of 1,4-butanediol, and 35 parts of tris(1-chloro-2-propyl) phosphate flame retardant to the mixing vessel and stir until homogeneous. Finally, add 0.3 parts of CUCAT-H catalyst, 0.4 parts of BX-1124 composite catalyst, 2.3 parts of CUCE-W antistatic agent, and 0.9 parts of YPXP-07A defoamer to the mixing vessel and stir further until homogeneous. Then, maintain a vacuum of 0.08–0.09 MPa and degas for 5–10 minutes. When no bubbles are present, pour the transparent liquid into a container, fill it with high-purity nitrogen, seal it at room temperature, and store it to obtain component A.

[0047] The second step is to prepare component B. The preparation process of component B is as follows: 43 parts of N220 type polyether polyol, 6 parts of N210 type polyether polyol, and 4 parts of polytetrahydrofuran ether diol were placed in a reaction vessel. The vessel was dehydrated under vacuum at 120°C and a pressure of 0.08–0.09 MPa for 1 hour. The mixture was then cooled to approximately 43°C. 38 parts of MDI-50 type diisocyanate were then added to the reaction vessel, and the reaction temperature was controlled at 55±2°C for 45 minutes. The temperature was then raised to 82±2°C and the reaction was continued for 2 hours until the reaction was complete. The reactants were then cooled to room temperature. 12 parts of polyphenyl polymethylene polyisocyanate, 13 parts of tris(2-chloroethyl) phosphate flame retardant, 0.7 parts of BYK-1799 defoamer, and 0.4 parts of CUCE-W antistatic agent were then added to the reaction vessel and mixed. The mixture was then kept under vacuum of 0.08–0.09 MPa for 5–10 minutes to remove bubbles. When no bubbles were found, the transparent liquid was poured into a container, filled with high-purity nitrogen, and sealed at room temperature to obtain component B.

[0048] The third step is the preparation of the quick repair adhesive for mine ventilation ducts. Mix component A and component B at a volume ratio of 1:1 and stir rapidly at room temperature for about 30 seconds to obtain a quick repair adhesive for mine ventilation ducts.

[0049] The N210 type polyether polyol, N220 type polyether polyol, 330N type polyether polyol, dimethylthiotoluene diamine, and 1,4-butanediol mentioned are all commercially available industrial products. The polytetrahydrofuran ether diol is a commercially available industrial product with a relative molecular mass of 2000. The MA-018 type polyether polyol is a bisphenol A polyether polyol with a hydroxyl value of 260-300 mgKOH / g, produced by Maizhen New Materials (Shanghai) Co., Ltd. The diisocyanate is MDI-50 type diisocyanate with -NCO content of 28-30% by mass, produced by Yantai Wanhua Chemical Group. The polyphenyl polymethylene polyisocyanate is PM200 type polyphenyl polymethylene polyisocyanate with a -NCO content of 30.5% to 32% by mass, produced by Yantai Wanhua Chemical Group; The flame retardants are tris(2-chloroethyl) phosphate (TCEP) and tris(1-chloro-2-propyl) phosphate (TCPP), both of which are commercially available premium-grade industrial products; The catalyst is a CUCAT-H type catalyst, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The composite catalyst is a BX-1124 type composite post-curing catalyst, which is produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The antistatic agent is a CUCE-W type antistatic agent, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The defoamer is YPXP-07A type defoamer, which is produced by Guangzhou Yourun Synthetic Materials Co., Ltd., and BYK-1799 type defoamer is distributed by BYK-1799 AG of Germany. The repair method of the quick repair adhesive for the mine ventilation duct is the same as in Example 3.

[0050] Referring to GB / T10247-2008 Viscosity Determination Method, GB / 4472-2001 Relative Density Determination Method for Chemical Products, GB / T2792-2014 Peel Strength Test Method for Adhesives, and MT113-1995 General Test Method and Judgment Rules for Flame Retardancy and Antistatic Properties of Polymer Products Used in Coal Mines, the properties of the quick repair adhesive for mine ventilation ducts of this invention before and after application were determined, as shown in Table 1. Test data for Examples 1 to 5 are within the indicated range.

[0051] Example 5 This embodiment provides a quick-repair adhesive for mine ventilation ducts, comprising component A and component B by weight, wherein... Component A includes: 29 parts of N210 type polyether polyol, 20 parts of N220 type polyether polyol, 11 parts of 330N type polyether polyol, 7 parts of MA-018 type polyether polyol, 7 parts of dimethyl thiotoluene diamine, 5 parts of 1,4-butanediol, 35 parts of tri(1-chloro-2-propyl) phosphate flame retardant, 0.3 parts of CUCAT-H type catalyst, 0.4 parts of BX-1124 type composite catalyst, 2.3 parts of CUCE-W type antistatic agent, and 0.9 parts of YPXP-07A type defoamer.

[0052] Component B includes: 43 parts of N220 type polyether polyol, 6 parts of N210 type polyether polyol, 4 parts of polytetrahydrofuran ether diol, 38 parts of MDI-50 type diisocyanate, 12 parts of polyphenyl polymethylene polyisocyanate, 13 parts of tris(2-chloroethyl) phosphate flame retardant, 0.7 parts of BYK-1799 type defoamer, and 0.4 parts of CUCE-W type antistatic agent.

[0053] The specific preparation method of the quick repair adhesive for mine ventilation ducts includes the following steps: Step 1: Prepare component A The preparation process of component A is as follows: First, add 29 parts of N210 polyether polyol, 20 parts of N220 polyether polyol, 11 parts of 330N polyether polyol, and 7 parts of MA-018 polyether polyol to a mixing vessel and stir until homogeneous. Then, add 7 parts of dimethyl thiotoluene diamine, 5 parts of 1,4-butanediol, and 35 parts of tris(1-chloro-2-propyl) phosphate flame retardant to the mixing vessel and stir until homogeneous. Finally, add 0.3 parts of CUCAT-H catalyst, 0.4 parts of BX-1124 composite catalyst, 2.3 parts of CUCE-W antistatic agent, and 0.9 parts of YPXP-07A defoamer to the mixing vessel and stir further until homogeneous. Then, maintain a vacuum of 0.08–0.09 MPa and degas for 5–10 minutes. When no bubbles are present, pour the transparent liquid into a container, fill it with high-purity nitrogen, seal it at room temperature, and store it to obtain component A.

[0054] The second step is to prepare component B. The preparation process of component B is as follows: 43 parts of N220 type polyether polyol, 6 parts of N210 type polyether polyol, and 4 parts of polytetrahydrofuran ether diol were placed in a reaction vessel. The vessel was dehydrated under vacuum at 120°C and a pressure of 0.08–0.09 MPa for 1 hour. The mixture was then cooled to approximately 43°C. 38 parts of MDI-50 type diisocyanate were then added to the reaction vessel, and the reaction temperature was controlled at 55±2°C for 45 minutes. The temperature was then raised to 82±2°C and the reaction was continued for 2 hours until the reaction was complete. The reactants were then cooled to room temperature. 12 parts of polyphenyl polymethylene polyisocyanate, 13 parts of tris(2-chloroethyl) phosphate flame retardant, 0.7 parts of BYK-1799 defoamer, and 0.4 parts of CUCE-W antistatic agent were then added to the reaction vessel and mixed. The mixture was then kept under vacuum of 0.08–0.09 MPa for 5–10 minutes to remove bubbles. When no bubbles were found, the transparent liquid was poured into a container, filled with high-purity nitrogen, and sealed at room temperature to obtain component B.

[0055] The third step is the preparation of the quick repair adhesive for mine ventilation ducts. Mix component A and component B at a volume ratio of 1:1 and stir rapidly at room temperature for about 30 seconds to obtain a quick repair adhesive for mine ventilation ducts.

[0056] The N210 type polyether polyol, N220 type polyether polyol, 330N type polyether polyol, dimethylthiotoluene diamine, and 1,4-butanediol mentioned are all commercially available industrial products. The polytetrahydrofuran ether diol is a commercially available industrial product with a relative molecular mass of 2000. The MA-018 type polyether polyol is a bisphenol A polyether polyol with a hydroxyl value of 260-300 mgKOH / g, produced by Maizhen New Materials (Shanghai) Co., Ltd. The diisocyanate is MDI-50 type diisocyanate with -NCO content of 28-30% by mass, produced by Yantai Wanhua Chemical Group. The polyphenyl polymethylene polyisocyanate is PM200 type polyphenyl polymethylene polyisocyanate with a -NCO content of 30.5% to 32% by mass, produced by Yantai Wanhua Chemical Group; The flame retardants are tris(2-chloroethyl) phosphate (TCEP) and tris(1-chloro-2-propyl) phosphate (TCPP), both of which are commercially available premium-grade industrial products; The catalyst is a CUCAT-H type catalyst, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The composite catalyst is a BX-1124 type composite post-curing catalyst, which is produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The antistatic agent is a CUCE-W type antistatic agent, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The defoamer is YPXP-07A type defoamer, which is produced by Guangzhou Yourun Synthetic Materials Co., Ltd., and BYK-1799 type defoamer is distributed by BYK-1799 AG of Germany. The repair method of the quick repair adhesive for the mine ventilation duct is the same as in Example 3.

[0057] Referring to GB / T10247-2008 Viscosity Determination Method, GB / 4472-2001 Relative Density Determination Method for Chemical Products, GB / T2792-2014 Peel Strength Test Method for Adhesives, and MT113-1995 General Test Method and Judgment Rules for Flame Retardancy and Antistatic Properties of Polymer Products Used in Coal Mines, the properties of the quick repair adhesive for mine ventilation ducts of this invention before and after application were determined, as shown in Table 1. Test data for Examples 1 to 5 are within the indicated range.

[0058]

Claims

1. A quick-repair adhesive for mine ventilation ducts, characterized in that, Includes component A and component B, both of which are expressed in parts by mass: Component A includes: 28-30 parts of N210 type polyether polyol, 18-20 parts of N220 type polyether polyol, 10-12 parts of 330N type polyether polyol, 6-8 parts of MA-018 type polyether polyol, 5-7 parts of dimethyl thiotoluene diamine, 4-6 parts of 1,4-butanediol, 34-36 parts of flame retardant, 0.2-0.4 parts of catalyst, 0.2-0.4 parts of composite catalyst, 1.5-2.5 parts of antistatic agent, and 0.6-1.0 parts of defoamer; Component B includes: 40-43 parts of N220 type polyether polyol, 5-7 parts of N210 type polyether polyol, 2-4 parts of polytetrahydrofuran ether diol, 37-38 parts of diisocyanate, 13-14 parts of polyphenyl polymethylene polyisocyanate, 11-15 parts of flame retardant, 0.5-1.0 parts of defoamer, and 0.3-0.5 parts of antistatic agent.

2. A method for preparing the rapid repair adhesive for mine ventilation ducts as described in claim 1, characterized in that, Includes the following steps: Step 1: Prepare component A The preparation process of component A is as follows: First, add 28-30 parts of N210 polyether polyol, 18-20 parts of N220 polyether polyol, 10-12 parts of 330N polyether polyol, and 6-8 parts of MA-018 type polyether polyol to a mixing vessel and stir until homogeneous. Then, add 5-7 parts of dimethyl thiotoluene diamine, 4-6 parts of 1,4-butanediol, and 34-36 parts of flame retardant to the mixing vessel and stir until homogeneous. Finally, add 0.2-0.4 parts of catalyst, 0.2-0.4 parts of composite catalyst, 1.5-2.5 parts of antistatic agent, and 0.6-1.0 parts of defoamer to the mixing vessel and stir until homogeneous. Then, maintain a vacuum of 0.08-0.09 MPa and degas for 5-10 minutes. When no bubbles are present, pour the transparent liquid into a container, fill it with high-purity nitrogen, seal it at room temperature, and store it to obtain component A. The second step is to prepare component B. The preparation process of component B is as follows: Place 40-43 parts of N220 type polyether polyol, 5-7 parts of N210 type polyether polyol, and 2-4 parts of polytetrahydrofuran ether diol in a reaction vessel. Maintain a vacuum of 0.08-0.09 MPa at 120°C for 1 hour to dehydrate the mixture. Then cool the mixture to about 43°C. Add 37-38 parts of diisocyanate to the reaction vessel and control the reaction temperature at 55±2°C for 45 minutes. Then raise the temperature to 82±2°C and react for 2 hours. After the reaction, cool the reactants to room temperature. Add 13-14 parts of polyphenyl polymethylene polyisocyanate, 11-15 parts of flame retardant, 0.5-1.0 parts of defoamer, and 0.3-0.5 parts of antistatic agent to the reaction vessel and mix thoroughly. Maintain a vacuum of 0.08-0.09 MPa and degas for 5-10 minutes. When no bubbles are present, pour the transparent liquid into a container, fill it with high-purity nitrogen, seal it at room temperature, and store it to obtain component B. The third step is the preparation of the quick repair adhesive for mine ventilation ducts. Mix component A and component B at a volume ratio of 1:1 and stir rapidly at room temperature for about 30 seconds to obtain a quick repair adhesive for mine ventilation ducts.

3. The quick-repair adhesive for mine ventilation ducts according to claim 1, characterized in that, The N210 type polyether polyol, N220 type polyether polyol, 330N type polyether polyol, dimethylthiotoluene diamine, and 1,4-butanediol mentioned are all commercially available industrial products. The polytetrahydrofuran ether diol is a commercially available industrial product with a relative molecular mass of 2000. The MA-018 type polyether polyol is a bisphenol A polyether polyol with a hydroxyl value of 260-300 mgKOH / g, produced by Maizhen Polymer New Materials (Shanghai) Co., Ltd. The diisocyanate is either MDI-50 or liquefied MDI-100L, with a -NCO content of 28% to 30%, and is produced by Yantai Wanhua Chemical Group. The polyphenyl polymethylene polyisocyanate is PM200 type polyphenyl polymethylene polyisocyanate with a -NCO content of 30.5% to 32% by mass, produced by Yantai Wanhua Chemical Group; The flame retardant is one or two of tri(2-chloroethyl) phosphate, tri(1-chloro-2-propyl) phosphate or triethyl phosphate flame retardant, preferably tri(2-chloroethyl) phosphate, all of which are commercially available premium-grade industrial products; The catalyst is any one of CUCAT-H, CUCAT-8 or CUCAT-A, and is produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The composite catalyst is a BX-1124 type composite post-curing catalyst, produced by Guangzhou Yourun Synthetic Materials Co., Ltd. The antistatic agent is any one or two of CUCE-W, JLWT-1, JLWT-2, and E-6019AR antistatic agents, preferably CUCE-W antistatic agent, which is produced by Guangzhou Yourun Synthetic Materials Co., Ltd., JLWT-1 and JLWT-2 antistatic agents are produced by Shandong Juli Antistatic Technology Co., Ltd., and E-6019AR antistatic agent is produced by Dongguan Fiat Antistatic Technology Co., Ltd. The defoamer is of type YPXP-07A, BYK-1790, BYK-1799, or BYK-501, with YPXP-07A being preferred. It is manufactured by Guangzhou Yourun Synthetic Materials Co., Ltd., while BYK-1790, BYK-1799, and BYK-501 are distributed by BYK-Sien GmbH of Germany.

4. A repair method using quick-repair adhesive for mine ventilation ducts, characterized by: The specific repair steps are as follows: First, take a patch and use sandpaper to sand the area around the damaged air duct opening and the surface of the patch. After sanding, clean the debris on the air duct opening and the surface of the patch with a brush. The surface must not be wet. The sanding area should be slightly larger than the area of ​​the damaged opening to be repaired. The second step is to mix component A and component B at a volume ratio of 1:1, stir rapidly at room temperature for about 30 seconds, and quickly apply the mixture to the damaged air duct fabric. After spreading it evenly, attach the patch to the damaged area, and then quickly remove any air bubbles between the patch and the original air duct fabric using pressure. Ensure that both the surface of the air duct fabric being repaired and the surface of the patch are covered with adhesive, without leaving any voids. The operation should be completed within 3 to 4 minutes, with an adhesive thickness of 0.3 to 0.4 mm. This operation can be performed on-site without shutting down the machine and while the air is running. The third step is to press the patch firmly over the entire area for about 10 minutes. After 30 to 45 minutes, the patch will be firmly bonded to the original duct fabric substrate, and the repair will be completed.

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