Room-temperature fast curing wood adhesive based on modified epoxy resin, process and application thereof

Abstract

The invention discloses a room-temperature fast curing wood adhesive based on modified epoxy resin, a process and application thereof, and the process comprises the following steps: adding bisphenol A epoxy resin into a first reaction kettle, and heating the first reaction kettle to 60 DEG C; carboxyl-terminated nitrile rubber is added into the dropwise adding mixing area through a first dropwise adding injection head, and a first high-frequency induction coil is controlled to selectively heat the carboxyl-terminated nitrile rubber in the dropwise adding mixing area; controlling a second high-frequency induction coil to heat the free carboxyl-terminated nitrile rubber in the detection area at a first heating frequency, and collecting a first temperature of the detection area and a second temperature outside the detection area; responding to the condition that the temperature difference value between the first temperature and the second temperature reaches a preset difference value, judging that carboxyl-terminated nitrile rubber and bisphenol A epoxy resin are completely and uniformly mixed to obtain a modified epoxy resin main agent; and mixing the tetrathiol compound and the nano catalytic modified amine according to a preset proportion to obtain the curing agent. The performance of the adhesive can be improved.

Description

Technical Field

[0001] The present invention relates to the field of epoxy resin adhesives, and particularly to a room-temperature rapid-curing wood adhesive based on modified epoxy resin, a process thereof, and an application thereof. Background Art

[0002] Epoxy resin adhesives have good process performance, are less affected by weather and environment during use, do not require complex pretreatment, and have excellent bonding performance, electrical insulation performance, and mechanical properties, and are widely used in the national defense and civilian fields. Especially with the rapid development of cryogenic engineering, aerospace applications, and superconducting technology, the demand for epoxy resin adhesives, sealants, and transfer molding matrix resins is increasing.

[0003] Since pure epoxy resin adhesives have the disadvantages of high brittleness, poor impact resistance, and low peel strength, they need to be modified before being used as structural adhesives. Modified epoxy resin adhesives can effectively improve the corresponding defects of epoxy resin adhesives by purposefully adding modifiers. The introduction of carboxyl-terminated nitrile rubber as a modifier significantly improves the toughness of epoxy resin, increases the elongation at break and impact strength; at the same time, when curing at room temperature, the impact resistance of the adhesive prepolymer with carboxyl-terminated nitrile rubber as a modifier is usually better than that of the blend. However, during the preparation of the modified epoxy resin adhesive, phase separation may occur during the addition of carboxyl-terminated nitrile rubber, which may lead to uneven distribution of carboxyl-terminated nitrile rubber, thereby reducing the finished product quality of the modified epoxy resin adhesive. Summary of the Invention

[0004] In view of the above-mentioned partial defects of the prior art, the technical problem to be solved by the present invention is to provide a room-temperature rapid-curing wood adhesive based on modified epoxy resin, a process thereof, and an application thereof, aiming to make the distribution of carboxyl-terminated nitrile rubber more uniform during the addition process, thereby improving the quality of the adhesive and further improving its performance.

[0005] To achieve the above object, the first aspect of the present invention discloses a preparation process of a room-temperature rapid-curing wood adhesive based on modified epoxy resin, and the process includes:

[0006] Step S1: Add bisphenol A epoxy resin to a first reaction kettle, and heat the first reaction kettle to 60°C; wherein, a first dropping injection head is provided on the first reaction kettle, a dropping mixing area corresponding to the first dropping injection head is arranged inside the first reaction kettle, stirrers are arranged around the dropping mixing area, a first high-frequency induction coil is provided on the first dropping injection head, a second high-frequency induction coil is arranged on the edge of the first reaction kettle, a detection area corresponding to the second high-frequency induction coil is arranged inside the first reaction kettle, a first temperature sensor is arranged in the detection area, and a second temperature sensor is arranged on the inner wall of the first reaction kettle outside the detection area;

[0007] Step S2: Add carboxyl-terminated nitrile rubber to the dropping and mixing zone through the first dropping and injection head, and control the first high-frequency induction coil to selectively heat the carboxyl-terminated nitrile rubber in the dropping and mixing zone at the first heating frequency corresponding to the polar groups in the carboxyl-terminated nitrile rubber to make the dropping and mixing zone reach 70 - 75 °C. At the same time, control the stirrer to stir;

[0008] Step S3: Control the second high-frequency induction coil to heat the carboxyl-terminated nitrile rubber free in the detection zone at the first heating frequency, and collect the first temperature in the detection zone through the first temperature sensor and the second temperature outside the detection zone through the second temperature sensor;

[0009] Step S4: In response to the temperature difference between the first temperature and the second temperature reaching a preset difference, determine that the carboxyl-terminated nitrile rubber and the bisphenol A epoxy resin are completely and evenly mixed to obtain the main agent of the modified epoxy resin;

[0010] Step S5: Mix the tetramercapto compound and the nano-catalytic modified amine in a preset ratio to obtain the curing agent.

[0011] Optionally, before step S2, it includes:

[0012] Obtain the types of polar groups in the carboxyl-terminated nitrile rubber; according to the types of the polar groups, obtain the corresponding first heating frequency; wherein, the first heating frequency uses the dielectric loss heat generation of the polar groups to increase the temperature of the carboxyl-terminated nitrile rubber, corresponding to the increase in the temperature of the dropping and mixing zone, while the temperature of the bisphenol A epoxy resin without polar groups corresponding to the first heating frequency remains unchanged.

[0013] Optionally, the amount of the bisphenol A epoxy resin in step S1 is 80 parts, and the carboxyl-terminated nitrile rubber in step S2 is 15 parts.

[0014] Optionally, before step S2, the process further includes:

[0015] Mix the carboxyl-terminated nitrile rubber and part of the bisphenol A epoxy resin in a ratio of 1:1 to increase the viscosity of the carboxyl-terminated nitrile rubber mixture and reduce the viscosity difference between the carboxyl-terminated nitrile rubber mixture and the bisphenol A epoxy resin;

[0016] Add the carboxyl-terminated nitrile rubber mixture to the first reaction kettle through the first dropping and injection head.

[0017] Optionally, the first temperature is related to the content of the carboxyl-terminated nitrile rubber in the detection area, and the content of the carboxyl-terminated nitrile rubber is related to the dropping injection amount and the mixing uniformity of the carboxyl-terminated nitrile rubber content; wherein, the detection area is located at the edge of the first reaction kettle, and when the content of the carboxyl-terminated nitrile rubber in the detection area reaches the requirement, it is determined that the mixing is uniform.

[0018] Optionally, step S4 includes:

[0019] In response to the temperature difference between the first temperature and the second temperature reaching a preset difference, it is determined that the content of the carboxyl-terminated nitrile rubber in the detection area meets the requirements, and further it is determined that the carboxyl-terminated nitrile rubber and the bisphenol A epoxy resin are completely mixed uniformly, obtaining the main agent of the modified epoxy resin.

[0020] Optionally, step S5 includes:

[0021] Mix the tetramercapto compound and the nano-catalytic modified amine in a ratio of 40:1 and uniformly mix them by ultrasonic dispersion.

[0022] In a second aspect of the present invention, a room-temperature rapid-curing wood adhesive based on a modified epoxy resin is disclosed, and the room-temperature rapid-curing wood adhesive is prepared by the preparation process of any one of the above room-temperature rapid-curing wood adhesives based on a modified epoxy resin.

[0023] In a third aspect of the present invention, an application of a room-temperature rapid-curing wood adhesive based on a modified epoxy resin is disclosed, and the application includes the application of the above room-temperature rapid-curing wood adhesive in wood bonding.

[0024] Advantages of the present invention: 1. By providing the first high-frequency induction coil, the present invention can effectively selectively heat the carboxyl-terminated nitrile rubber in the dropping and mixing zone during the addition process of the carboxyl-terminated nitrile rubber, so that the dropping and mixing zone reaches 70-75 °C, thereby reducing the viscosity of bisphenol A epoxy resin in the dropping and mixing zone and making it easier for the carboxyl-terminated nitrile rubber to diffuse. Therefore, the carboxyl-terminated nitrile rubber of the present invention is more evenly distributed during the addition process and is not prone to phase separation, effectively improving the product quality. 2. The present invention can effectively heat the dropping and mixing zone through the high-frequency induction coil, avoiding the situation that the temperature of other regions rises, reducing the reaction efficiency and even causing by-products. 3. Since the carboxyl-terminated nitrile rubber is more likely to diffuse in the dropping and mixing zone with rising temperature, the dropping and mixing zone of the present invention can inject a larger amount of carboxyl-terminated nitrile rubber at the same time, thereby improving the addition efficiency of the carboxyl-terminated nitrile rubber and the overall preparation efficiency. 4. The present invention also through the setting and control of the second high-frequency induction coil, the first temperature sensor and the second temperature sensor, can effectively obtain the distribution content of the carboxyl-terminated nitrile rubber at the edge of the first reaction kettle through the temperature, and then judge whether the carboxyl-terminated nitrile rubber and bisphenol A epoxy resin are completely mixed evenly. In this way, the quality of the adhesive can be effectively monitored to avoid the situation of uneven distribution and quality decline.

[0025] In summary, the present invention makes the carboxyl-terminated nitrile rubber more evenly distributed during the addition process, with a faster addition efficiency, thereby improving the quality and preparation efficiency of the adhesive, and further improving its performance, enabling it to retain the modified advantages of rapid curing at room temperature and high toughness. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a process flow diagram of a preparation process of a room-temperature rapid-curing wood adhesive based on modified epoxy resin provided by a specific embodiment of the present invention;

[0027] Figure 2 is a structural diagram of a first reaction kettle provided by a specific embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The present invention discloses a room-temperature rapid-curing wood adhesive based on modified epoxy resin, a process and its application. Those skilled in the art can draw on the content of this article and appropriately improve the technical details to achieve it. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art, and they are all regarded as included in the present invention. The methods and applications of the present invention have been described through preferred embodiments, and those related can obviously make changes or appropriate changes and combinations to the methods and applications described herein without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

[0029] The applicant's research has found that: due to the disadvantages of pure epoxy resin adhesives, such as high brittleness, poor impact resistance, and low peel strength, they need to be modified before being used as structural adhesives. Modified epoxy resin adhesives can effectively improve the corresponding defects of epoxy resin adhesives by purposefully adding modifiers. The introduction of carboxyl-terminated nitrile rubber as a modifier significantly enhances the toughness of epoxy resin, increases the elongation at break and impact strength; at the same time, when cured at room temperature, the impact resistance of the adhesive prepolymer with carboxyl-terminated nitrile rubber as a modifier is usually better than that of the blend. However, in the process of preparing this modified epoxy resin adhesive, the carboxyl-terminated nitrile rubber needs to be added dropwise. If the dropping speed is too slow, it will affect the preparation efficiency; if the dropping speed is too fast, it will cause phase separation, resulting in uneven distribution of carboxyl-terminated nitrile rubber, thereby reducing the finished product quality of the modified epoxy resin adhesive.

[0030] Therefore, the embodiment of the present invention provides a preparation process for a room-temperature rapid-curing wood adhesive based on modified epoxy resin, as Figure 1 shown, the process includes:

[0031] Step S1: Add bisphenol A epoxy resin to the first reaction kettle and heat the first reaction kettle to 60°C.

[0032] Among them, as Figure 2 shown, a first dropping injection head 202 is provided on the first reaction kettle 201, the area corresponding to the first dropping injection head 202 in the first reaction kettle 201 is a dropping mixing area 203, a stirrer 204 is provided around the dropping mixing area 203, a first high-frequency induction coil 205 is provided on the first dropping injection head 202, a second high-frequency induction coil 206 is provided at the edge of the first reaction kettle 201, the area corresponding to the second high-frequency induction coil 206 in the first reaction kettle 201 is a detection area 207, a first temperature sensor 208 is provided in the detection area 207, and a second temperature sensor 209 is provided on the inner wall 201 of the first reaction kettle outside the detection area.

[0033] It should be noted that the optimal reaction temperature for bisphenol A epoxy resin and carboxyl-terminated nitrile rubber is 60°C. Exceeding this temperature may reduce the reaction efficiency or produce by-products. Heating the dropping mixing area to 70 - 75°C is to reduce the viscosity of bisphenol A epoxy resin, making it easier for carboxyl-terminated nitrile rubber to diffuse. The reaction mainly takes place in the 60°C environment of the non-dropping mixing area.

[0034] Step S2: Add carboxyl-terminated nitrile rubber to the dropping mixing area through the first dropping injection head, and control the first high-frequency induction coil to selectively heat the carboxyl-terminated nitrile rubber in the dropping mixing area at the first heating frequency corresponding to the polar groups in the carboxyl-terminated nitrile rubber to make the dropping mixing area reach 70 - 75°C, while controlling the stirrer to stir.

[0035] It should be noted that in the embodiment of the present invention, the first high-frequency induction coil is first used for rotary heating to make the dropping mixing area reach 70-75 °C, so that the carboxyl-terminated nitrile rubber is more likely to diffuse and no phase separation occurs. At the same time, the stirrer is used for stirring to further diffuse the carboxyl-terminated nitrile rubber to the 60 °C area of the non-dropping mixing area for reaction.

[0036] In this specific embodiment, before step S2, it includes:

[0037] Obtain the types of polar groups in the carboxyl-terminated nitrile rubber; according to the types of polar groups, obtain the corresponding first heating frequency; wherein, the first heating frequency uses the dielectric loss heat generation of the polar groups to increase the temperature of the carboxyl-terminated nitrile rubber, corresponding to the increase in the temperature of the dropping mixing area, while the bisphenol A epoxy resin does not contain polar groups corresponding to the first heating frequency and the temperature remains unchanged.

[0038] It should be noted that only the carboxyl-terminated nitrile rubber with polar groups can be selectively heated by the high-frequency induction coil, while the bisphenol A epoxy resin does not have polar groups and will not heat up. Based on this principle, the embodiment of the present invention can effectively heat the required area and avoid the situation where the overall heating cannot maintain the optimal reaction temperature of the carboxyl-terminated nitrile rubber and the bisphenol A epoxy resin.

[0039] In this specific embodiment, before step S2, the process further includes:

[0040] Mix the carboxyl-terminated nitrile rubber and a part of bisphenol A epoxy resin in a ratio of 1:1 to increase the viscosity of the carboxyl-terminated nitrile rubber mixture and reduce the viscosity difference between the carboxyl-terminated nitrile rubber mixture and the bisphenol A epoxy resin;

[0041] Inject the carboxyl-terminated nitrile rubber mixture into the first reaction kettle through the first dropping injection head.

[0042] It should be noted that the viscosity difference will affect the diffusion efficiency, and the greater the viscosity difference, the greater the diffusion resistance. Therefore, through this embodiment of the present invention, the viscosity difference between the mixture and the bisphenol A epoxy resin can be reduced, and the carboxyl-terminated nitrile rubber can be more easily diffused into the bisphenol A epoxy resin.

[0043] In a specific application, the amount of bisphenol A epoxy resin in step S1 is 80 parts, and the carboxyl-terminated nitrile rubber in step S2 is 15 parts.

[0044] Step S3: Control the second high-frequency induction coil to heat the free carboxyl-terminated nitrile rubber in the detection area at the first heating frequency, and collect the first temperature in the detection area through the first temperature sensor and collect the second temperature outside the detection area through the second temperature sensor.

[0045] It should be noted that in the embodiment of the present invention, the edge-free carboxyl-terminated nitrile rubber can be heated by the second high-frequency induction coil, and then the detection area is collected. The content of the carboxyl-terminated nitrile rubber in the detection area (i.e., the edge of the first reaction kettle) can be obtained through the temperature change, and whether the carboxyl-terminated nitrile rubber is evenly distributed can be judged according to the content of the carboxyl-terminated nitrile rubber. In this way, it is possible to detect in real time whether the carboxyl-terminated nitrile rubber is evenly distributed and improve the product quality.

[0046] In this specific embodiment, the first temperature is related to the content of the carboxyl-terminated nitrile rubber in the detection area, and the content of the carboxyl-terminated nitrile rubber is related to the dropping injection amount and the mixing uniformity of the carboxyl-terminated nitrile rubber; wherein, the detection area is located at the edge of the first reaction kettle. When the content of the carboxyl-terminated nitrile rubber in the detection area reaches the requirement, it is judged that the mixing is uniform.

[0047] It should be noted that in a specific application, the addition amount of the carboxyl-terminated nitrile rubber is certain. After the addition is completed, it is possible to judge whether the mixing is uniform by the temperature difference between the first temperature and the second temperature.

[0048] Step S4: In response to the temperature difference between the first temperature and the second temperature reaching a preset difference, it is judged that the carboxyl-terminated nitrile rubber and bisphenol A epoxy resin are completely mixed evenly, and the modified epoxy resin main agent is obtained.

[0049] It should be noted that because when the carboxyl-terminated nitrile rubber and bisphenol A epoxy resin are mixed more evenly, the content of the carboxyl-terminated nitrile rubber at the edge of the first reaction kettle is higher, and the first temperature will also be higher. Therefore, in the embodiment of the present invention, it is stipulated that when the temperature difference between the first temperature and the second temperature reaches a preset difference, it is considered that the two have been evenly mixed.

[0050] In this specific embodiment, step S4 includes:

[0051] In response to the temperature difference between the first temperature and the second temperature reaching a preset difference, it is judged that the content of the carboxyl-terminated nitrile rubber in the detection area meets the requirements, and then it is judged that the carboxyl-terminated nitrile rubber and bisphenol A epoxy resin are completely mixed evenly, and the modified epoxy resin main agent is obtained.

[0052] Step S5: Mix the tetramercapto compound and the nano-catalytic modified amine according to a preset ratio to obtain a curing agent.

[0053] It should be noted that the tetramercapto compound is a polyhydric thiol, and the nano-catalytic modified amine metal catalyzes and accelerates the amine-epoxy reaction, shortens the gel time, and improves the curing efficiency.

[0054] In a specific application, step S5 includes:

[0055] Mix the tetramercapto compound and the nano-catalytic modified amine in a ratio of 40:1 and uniformly mix them by ultrasonic dispersion.

[0056] The embodiment of the present invention also provides a room-temperature rapid-curing wood adhesive based on modified epoxy resin, and the room-temperature rapid-curing wood adhesive is prepared by the preparation process of any one of the above room-temperature rapid-curing wood adhesives based on modified epoxy resin.

[0057] The embodiment of the present invention also provides an application of a room-temperature rapid-curing wood adhesive based on modified epoxy resin, and the application includes the application of the above room-temperature rapid-curing wood adhesive in wood bonding.

[0058] By setting the first high-frequency induction coil, the embodiment of the present invention can effectively selectively heat the carboxyl-terminated nitrile rubber in the dropping and mixing area during the addition process of the carboxyl-terminated nitrile rubber, so that the dropping and mixing area reaches 70-75 °C, thereby reducing the viscosity of bisphenol A epoxy resin in the dropping and mixing area and making it easier for the carboxyl-terminated nitrile rubber to diffuse. Therefore, the carboxyl-terminated nitrile rubber in the embodiment of the present invention is more evenly distributed during the addition process and is not prone to phase separation, effectively improving the product quality.

[0059] The embodiment of the present invention can effectively heat the dropping and mixing area through the high-frequency induction coil, avoiding the situation that the temperature of other areas rises, reducing the reaction efficiency and even causing by-products.

[0060] Since the carboxyl-terminated nitrile rubber is more likely to diffuse in the dropping and mixing area with the increase of temperature, the embodiment of the present invention can inject a larger amount of carboxyl-terminated nitrile rubber into the dropping and mixing area at the same time, thereby improving the addition efficiency of the carboxyl-terminated nitrile rubber and the overall preparation efficiency.

[0061] The embodiment of the present invention also effectively obtains the distribution content of the carboxyl-terminated nitrile rubber at the edge of the first reaction kettle through temperature by setting and controlling the second high-frequency induction coil, the first temperature sensor and the second temperature sensor, and then judges whether the carboxyl-terminated nitrile rubber and bisphenol A epoxy resin are completely mixed evenly. In this way, the quality of the adhesive can be effectively monitored to avoid the situation of uneven distribution and quality decline.

[0062] In summary, the embodiment of the present invention makes the carboxyl-terminated nitrile rubber more evenly distributed during the addition process, the addition efficiency is faster, thereby improving the quality and preparation efficiency of the adhesive, and further improving its performance, so that it can retain the modified advantages of room-temperature rapid curing and high toughness.

[0063] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element.

[0064] Each embodiment in this specification is described in a related manner. For the same or similar parts among the embodiments, reference can be made to each other, and the differences between each embodiment and other embodiments are emphasized. In particular, for system embodiments, since they are basically similar to method embodiments, the description is relatively simple, and reference can be made to the relevant parts of the method embodiments for the relevant content.

[0065] The above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included within the protection scope of the present invention.

Claims

1. A process for preparing a room temperature fast curing wood adhesive based on modified epoxy resin, characterized in that: The process comprises: Step S1, adding bisphenol A epoxy resin to a first reactor, and heating the first reactor to 60° C.; wherein a first dripping injection head is provided on the first reactor, and an area corresponding to the first dripping injection head in the first reactor is a dripping mixing area, and an agitator is provided around the dripping mixing area. A first high-frequency induction coil is provided on the first dripping injection head, and a second high-frequency induction coil is provided at the edge of the first reactor. The area corresponding to the second high-frequency induction coil in the first reactor is a detection area, and a first temperature sensor is provided in the detection area, and a second temperature sensor is provided on the inner wall of the first reactor outside the detection area; Step S2, adding the carboxyl-terminated nitrile rubber to the dropping mixing zone through the first dropping injection head, and controlling the first high-frequency induction coil to selectively heat the carboxyl-terminated nitrile rubber in the dropping mixing zone at a first heating frequency corresponding to the polar group in the carboxyl-terminated nitrile rubber so that the dropping mixing zone reaches 70-75° C., and controlling the agitator to stir at the same time; Step S3, controlling the second high-frequency induction coil to heat the free carboxyl-terminated nitrile rubber in the detection area at the first heating frequency, and collecting a first temperature of the detection area through the first temperature sensor and a second temperature outside the detection area through the second temperature sensor; Step S4, in response to the temperature difference between the first temperature and the second temperature reaching a preset difference, judging that the carboxyl-terminated nitrile rubber and the bisphenol A epoxy resin are completely mixed and uniform, to obtain a modified epoxy resin main agent; Step S5, mixing the tetrathiol compound and the nano-catalytic modified amine according to a preset ratio to obtain a curing agent.

2. The process for preparing a room temperature fast curing wood adhesive based on modified epoxy resin according to claim 1, characterized in that: The step S2 includes: Obtain the type of polar groups in the terminal carboxyl nitrile rubber; obtain the corresponding first heating frequency according to the type of the polar groups; wherein the first heating frequency utilizes the dielectric loss of the polar groups to generate heat to increase the temperature of the terminal carboxyl nitrile rubber, corresponding to the increase in the temperature of the drip mixing zone, while the bisphenol A epoxy resin does not contain the polar groups corresponding to the first heating frequency and maintains the temperature.

3. The process for preparing a room temperature fast curing wood adhesive based on modified epoxy resin according to claim 1, characterized in that: The amount of the bisphenol A epoxy resin in step S1 is 80 parts, and the amount of the carboxyl-terminated nitrile rubber in step S2 is 15 parts.

4. The process for preparing a room temperature fast curing wood adhesive based on modified epoxy resin according to claim 1, characterized in that: Before step S2, the process further includes: The carboxyl-terminated nitrile rubber and part of the bisphenol A epoxy resin are mixed in a ratio of 1:1 to increase the viscosity of the carboxyl-terminated nitrile rubber mixed solution and reduce the viscosity difference between the carboxyl-terminated nitrile rubber mixed solution and the bisphenol A epoxy resin; The carboxyl-terminated nitrile rubber mixed liquid is added into the first reaction kettle through the first drip injection head.

5. The process for preparing a room temperature fast curing wood adhesive based on modified epoxy resin according to claim 1, characterized in that: The first temperature is related to the content of the terminal carboxyl nitrile rubber in the detection zone, and the content of the terminal carboxyl nitrile rubber is related to the drip injection amount of the terminal carboxyl nitrile rubber content and the mixing uniformity; wherein, the detection zone is located at the edge of the first reactor, and when the content of the terminal carboxyl nitrile rubber in the detection zone reaches the requirement, it is judged that the mixing is uniform.

6. The process for preparing a room temperature fast curing wood adhesive based on modified epoxy resin according to claim 1, characterized in that: The step S4 comprises: In response to the temperature difference between the first temperature and the second temperature reaching a preset difference, it is judged that the content of the terminal carboxyl nitrile rubber in the detection area meets the requirement, and then it is judged that the terminal carboxyl nitrile rubber and the bisphenol A epoxy resin are completely mixed and uniform to obtain a modified epoxy resin main agent.

7. The process for preparing a room temperature fast curing wood adhesive based on modified epoxy resin according to claim 1, characterized in that: The step S5 comprises: The tetrathiol compound and the nano-catalytic modified amine are uniformly mixed in a ratio of 40:1 by ultrasonic dispersion.

8. A room temperature fast curing wood adhesive based on modified epoxy resin, characterized in that: The room temperature fast curing wood adhesive is prepared by using any one of the room temperature fast curing wood adhesive preparation processes based on modified epoxy resins in claims 1-7.

9. An application of a room temperature fast curing wood adhesive based on modified epoxy resin, characterized in that: The application includes application of the room temperature fast curing wood adhesive according to claim 8 in wood bonding.

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