Epoxy splicing adhesive for low-temperature wind power mixing tower and preparation method of epoxy splicing adhesive

Abstract

The invention discloses an epoxy splicing adhesive for a low-temperature wind power mixing tower. The epoxy splicing adhesive comprises a component A and a component B. The component A comprises bisphenol A type epoxy resin, bisphenol F type epoxy resin, a reactive diluent, a functional cross-linking agent, an epoxy coupling agent, a thixotropic agent, a flexibilizer, titanium dioxide and filler, and the functional cross-linking agent comprises an olefin cross-linking agent, a functional olefin monomer and a polymerization inhibitor. The component B comprises a phenolic aldehyde amine curing agent, an accelerant, a thixotropic agent, a cross-linking initiator, an amino coupling agent, carbon black and filler; the cross-linking initiator comprises a functional olefin monomer cross-linking agent, an initiator and an initiation accelerant. On one hand, starting from a resin system, the problems of high viscosity and easy crystallization of epoxy resin at low temperature are solved; on the other hand, starting from the design of a curing system, the reaction activity of the epoxy splicing adhesive in a subzero environment is improved, and the epoxy splicing adhesive has good early strength and low-temperature toughness and meets the requirements for fixing and bonding performance of the wind power mixed tower prefabricated duct piece at low temperature.

Description

Technical Field

[0001] This invention relates to the field of concrete repair and reinforcement technology, specifically to a low-temperature epoxy splicing adhesive for wind power hybrid towers and its preparation method. Background Technology

[0002] With the introduction and advancement of the "dual-carbon" strategy, clean and renewable energy is developing rapidly. Wind power, as a relatively low-cost alternative, plays a vital role in addressing energy and environmental issues. Currently, domestic and international wind turbine units have small single-unit capacities and low power generation efficiency, requiring larger rotor diameters to increase the swept area, which in turn demands higher tower heights. Using concrete wind turbine towers can effectively solve the problem of insufficient tower height. Concrete wind turbine towers are mostly constructed by splicing prefabricated segments together vertically and horizontally using epoxy adhesive. Their efficient design, cost-effectiveness, and excellent environmental adaptability make concrete towers a rational choice for wind power projects.

[0003] Epoxy jointing adhesive is a key component in the construction of wind turbine towers. It possesses excellent mechanical properties, fatigue resistance, and aging resistance, while also providing bonding, sealing, and waterproofing functions. Since the joints between concrete segments are critical load-bearing areas of the structure, the performance of the epoxy jointing adhesive directly affects the stability and durability of the overall tower structure.

[0004] The performance of epoxy splicing adhesives is greatly affected by ambient temperature. Currently, the existing group standard T / CECS 10080 / 2020, "Epoxy Adhesives for Precast Segment Assembly," classifies splicing adhesives into three categories based on applicable temperature: 5~20℃, 15~30℃, and 25~40℃, without specifying applications for splicing adhesives at sub-zero temperatures. However, with the increasing demand for wind power tower splicing projects in northern my country, the workability and curing properties of epoxy splicing adhesives in environments ranging from -10℃ to 0℃ pose significant challenges, urgently requiring the development of a low-temperature wind power tower splicing adhesive capable of curing at sub-zero temperatures. To address this issue, patent CN 118667492A discloses a self-heating precast component splicing adhesive and its preparation method. The main method involves adding exothermic agents such as iron powder and tungsten powder, and thixotropic agents such as sodium bentonite and attapulgite, causing an oxidation reaction that triggers a reaction between the epoxy resin and the curing agent. However, the presence of moisture itself can have adverse effects on epoxy curing, and the exothermic agent also poses risks of premature oxidation, poor storage, and difficulty in controlling moisture content during the reaction process. Patent CN 117757400 A discloses a low-temperature, rapid-curing epoxy adhesive and its preparation method, primarily achieved by modifying traditional bisphenol A type epoxy resin with flexible polyol segments to reduce the viscosity of the resin system at low temperatures, and by using a thiourea-modified amine curing agent to increase low-temperature activity. However, this preparation method requires prior modification of the raw materials, making the production process complex. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a low-temperature epoxy bonding adhesive for wind turbine hybrid towers and its preparation method. On the one hand, this invention addresses the issues of high viscosity and easy crystallization of epoxy resin at low temperatures by focusing on the resin system, thus improving the operability of the epoxy bonding adhesive in sub-zero winter environments. On the other hand, it enhances the reactivity of the epoxy bonding adhesive in sub-zero environments by designing the curing system, resulting in good early strength and low-temperature toughness, meeting the requirements for fixing and bonding prefabricated segments in wind turbine hybrid towers at low temperatures.

[0006] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A low-temperature epoxy splicing adhesive for wind power hybrid towers, comprising component A and component B; Component A comprises the following raw materials in parts by weight: 40-70 parts of bisphenol A type epoxy resin 30-60 parts of bisphenol F type epoxy resin, 5-15 parts of reactive diluent 5-20 parts of functional crosslinking agent 0.5-3 parts of epoxy coupling agent, Thixotropic agent 1-4 parts, Toughening agent 0.5-3 parts, 1-5 parts titanium dioxide 180-320 parts of filler; The functional crosslinking agent is composed of an olefin crosslinking agent, a functional olefin monomer, and a polymerization inhibitor in a mass ratio of 3~20:2~10:0.1~0.5; Component B comprises the following raw materials in parts by weight: 80-140 parts of phenolic amine curing agent, Accelerator 5-30 parts, 4-20 parts of thixotropic agent 2-10 parts of crosslinking initiator 5-14 parts of amino coupling agent, Carbon black 0.005~0.1 parts, 180-280 parts of filler; The crosslinking initiator is composed of a functional olefin monomer crosslinking agent, an initiator, and an initiation promoter in a mass ratio of 2~10:0.3~1:0.3~1.

[0007] Furthermore, the epoxy splicing adhesive for low-temperature wind power hybrid towers of the present invention is composed of component A and component B in a mass ratio of 2.6~3.2:1.

[0008] Furthermore, the epoxy value of the bisphenol A type epoxy resin of the present invention is 0.51 to 0.55 mol / 100g.

[0009] Furthermore, the epoxy value of the bisphenol F type epoxy resin of the present invention is 0.44 to 0.55 mol / 100g.

[0010] Furthermore, the active diluent of the present invention is selected from phenyl glycidyl ether, benzyl glycidyl ether, butyl glycidyl ether, and 1,4-dimethylglycidyl ether. Butylene glycol diglycidyl ether, trimethylolpropane triglycidyl ether, or a mixture thereof, more preferably benzyl glycidyl ether and 1,4-butylene glycol diglycidyl ether, are selected from any one or more of these, and the mixture is preferred. A mixture of butanediol diglycidyl ether.

[0011] Furthermore, in the functional crosslinking agent of the present invention, the olefin crosslinking agent is selected from any one or a mixture of more than one of styrene, methyl acrylate, methyl methacrylate, and butyl acrylate; The functional olefin monomer is tert-butylaminoethyl methacrylate; The polymerization inhibitor is selected from any one of hydroquinone, methylhydroquinone, and p-benzoquinone.

[0012] Furthermore, the epoxy coupling agent of the present invention is selected from any one or a mixture of more than one of glycidyl etheroxypropyltrimethoxysilane and glycidyl etheroxypropyltriethoxysilane.

[0013] Furthermore, the toughening agent of the present invention is selected from any one or a mixture of one or more of the following: carboxyl-terminated liquid nitrile rubber, liquid polysulfide rubber, calcium carbonate whiskers, and calcium sulfate whiskers.

[0014] Furthermore, the active hydrogen equivalent of the phenolic amine curing agent described in this invention is 60~78 g / eq.

[0015] Furthermore, the accelerator described in this invention is dimethylaniline and 2,4,6-dimethylaniline. When tris(dimethylaminomethyl)phenol is mixed at a mass ratio of 0.5 to 1.2:1, dimethylaniline can promote the reaction between epoxy and phenolic amine curing agent, while also effectively promoting the addition polymerization reaction of initiator and initiation promoter to functional crosslinking agent, thus providing the final strength of the material.

[0016] Furthermore, in the crosslinking initiator of the present invention, the functional olefin monomer crosslinking agent is selected from any one or a mixture of more than one of hexamethylene diisocyanate, isophorone diisocyanate, toluene diisocyanate, and diphenylmethane diisocyanate; The initiator is selected from any one or a mixture of one or more of methyl ethyl ketone peroxide and cyclohexanone peroxide; The initiator is selected from any one or a mixture of cobalt isooctanoate solution, cobalt naphthenate solution, and cobalt octanoate solution; the crosslinking initiator is used to initiate the curing of the functional crosslinking agent in component A, providing early strength of the material.

[0017] Furthermore, the amino coupling agent described in this invention is selected from 3... aminopropyltriethoxysilane, N β (aminoethyl) γ Any one or more of aminopropyltrimethoxysilanes.

[0018] Furthermore, the thixotropic agents described in components A and B of this invention are each independently selected from any one or a mixture of more than one of hydrophobic fumed silica, organobentonite, and polyamide wax.

[0019] Furthermore, the fillers in components A and B of the present invention are each independently selected from any one or more of quartz powder, calcium carbonate, silica powder, and alumina. Preferably, the mesh size of the filler is 60 to 400 mesh.

[0020] Furthermore, the titanium dioxide described in this invention is rutile titanium dioxide; The carbon black is a colorant carbon black.

[0021] Furthermore, the present invention also provides a method for preparing the above-mentioned low-temperature epoxy splicing adhesive for wind power hybrid towers, comprising the following steps: (1) Preparation of component A: Weigh the raw materials used in the resin system of component A according to the weight parts; add bisphenol A type epoxy resin, bisphenol F type epoxy resin, reactive diluent and epoxy coupling agent into a mixer and mix evenly; add functional crosslinking agent, thixotropic agent, toughening agent and titanium dioxide and continue stirring; add filler and stir evenly under vacuum to obtain component A; (2) Preparation of component B: Weigh the raw materials used in the curing system of component B according to the weight parts; add phenolic amine curing agent, accelerator and amino coupling agent to a mixer and mix evenly; add crosslinking initiator, thixotropic agent and carbon black and continue stirring; add filler and stir evenly under vacuum to obtain component B; (3) When using, mix component A and component B evenly to obtain the low-temperature type epoxy splicing adhesive for wind power hybrid towers.

[0022] The low-temperature epoxy splicing adhesive for wind power hybrid towers described in this invention uses readily available raw materials and has a simple preparation method, which is of great significance for expanding the application of low-temperature epoxy splicing adhesives.

[0023] Furthermore, the mixer described in this invention is a planetary mixer.

[0024] Preferably, the mixing time in steps (1) and (2) is independently selected as 30-60 min, the stirring time is independently selected as 20-40 min, the stirring temperature is independently selected as 40-60 ℃, and the vacuum stirring time is independently selected as 60-90 min.

[0025] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention adds a low-viscosity functional crosslinking agent to component A, which greatly reduces the viscosity of the resin system at -10~0℃. Furthermore, the functional crosslinking agent has random arrangement between molecules of bisphenol A epoxy resin, bisphenol F epoxy resin and reactive diluent, solving the problem of easy crystallization of traditional epoxy resin at low temperatures. This low-temperature epoxy bonding adhesive still has good thixotropy and workability at -10~0℃, and can be mixed and applied normally without heating, with a bonding time ≥60 min.

[0026] (2) After mixing and stirring components A and B of the present invention, on the one hand, the crosslinking initiator of component B will initiate an addition polymerization reaction between the olefin crosslinking agent and the functional olefin monomer in component A under the promotion of the accelerator dimethylaniline; on the other hand, the functional olefin monomer in the functional crosslinking agent of component A and the functional olefin monomer crosslinking agent in the crosslinking initiator of component B will undergo a rapid condensation polymerization reaction. The functional olefin monomer in component A has high reactivity with the functional olefin monomer crosslinking agent in component B at low temperatures. These two types of rapid reactions will release heat, reduce the activation energy of colloid curing at low temperatures, and improve the early and late curing degree of the splicing adhesive in the -10~0℃ environment, so as to achieve the mechanical properties required for assembly (12h≥20MPa, 24h compressive strength≥60MPa, 7d compressive strength≥80MPa), and improve the stability and safety of precast components.

[0027] (3) By adding toughening agents, accelerators and coupling agents, the present invention further improves the crack resistance, curing and adhesion of the low-temperature epoxy splicing adhesive at -10~0℃. Detailed Implementation

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1 A low-temperature epoxy splicing adhesive for wind power hybrid towers is composed of isolated components A and B in a weight ratio of 2.6:1. Its preparation methods include: Component A: 62 parts of bisphenol A type epoxy resin (epoxy value 0.54), 42 parts of bisphenol F type epoxy resin (epoxy value 0.51), 8 parts of reactive diluent (benzyl glycidyl ether), and 1.5 parts of epoxy coupling agent (glycidyl ether oxypropyltrimethoxysilane) were added to a planetary mixer and mixed at 50°C for 50 min; then 12 parts of functional crosslinking agent, 2 parts of thixotropic agent (hydrophobic fumed silica), 1.5 parts of toughening agent (carboxyl-terminated liquid nitrile rubber), and 3 parts of titanium dioxide were added and the mixture was stirred for another 40 min; finally, 260 parts of filler were added and the mixture was stirred under vacuum for 80 min. Component B: 110 parts phenolic amine curing agent, 5 parts accelerator (dimethylaniline), and accelerators (2, 4, 6...) Tris(dimethylaminomethyl)phenol 10 parts, amino coupling agent (3 Add 6 parts of aminopropyltriethoxysilane to a planetary mixer and mix at 40°C for 60 min; then add 5 parts of crosslinking initiator, 12 parts of thixotropic agent (hydrophobic fumed silica), and 0.01 parts of carbon black and continue stirring for 30 min; finally add 214 parts of filler and stir under vacuum for 70 min. The functional crosslinking agent is composed of 7 parts methyl methacrylate, 4.7 parts tert-butylaminoethyl methacrylate, and 0.3 parts hydroquinone. The crosslinking initiator is composed of 4 parts hexamethylene diisocyanate, 0.5 parts methyl ethyl ketone peroxide, and 0.5 parts cobalt isooctanoate solution; The filler in component A is composed of 120 parts of 200-mesh quartz powder and 140 parts of 400-mesh silica powder; The filler in component B is composed of 104 parts of 100-mesh quartz powder and 110 parts of 400-mesh silica powder.

[0030] Example 2 A low-temperature epoxy splicing adhesive for wind power hybrid towers is composed of isolated components A and B in a weight ratio of 2.8:1. Its preparation methods include: Component A: 66 parts of bisphenol A type epoxy resin (epoxy value 0.52), 36 parts of bisphenol F type epoxy resin (epoxy value 0.49), and reactive diluent (1,4... 12 parts of butylene glycol diglycidyl ether and 2 parts of epoxy coupling agent (glycidyl etheroxypropyltrimethoxysilane) were added to a planetary mixer and mixed at 45°C for 40 min. Then, 16 parts of functional crosslinking agent, 2.5 parts of thixotropic agent (organo-bentonite), 2 parts of toughening agent (liquid polysulfide rubber), and 2.5 parts of titanium dioxide were added and the mixture was stirred for another 35 min. Finally, 244 parts of filler were added and the mixture was stirred under vacuum for 70 min. Component B: 116 parts phenolic amine curing agent, 6 parts accelerator (dimethylaniline), and accelerators (2, 4, 6...) Tris(dimethylaminomethyl)phenol 7 parts, amino coupling agent (N β (aminoethyl) γ Add 8 parts of aminopropyltrimethoxysilane to a planetary mixer and mix at 45°C for 50 min; then add 7 parts of crosslinking initiator, 10 parts of thixotropic agent (organo-bentonite), and 0.015 parts of carbon black and continue mixing for 35 min; finally add 201 parts of filler and vacuum mix for 80 min. The functional crosslinking agent is composed of 6 parts methyl acrylate, 9.6 parts tert-butylaminoethyl methacrylate, and 0.4 parts hydroquinone; The crosslinking initiator is composed of 6 parts isophorone diisocyanate, 0.6 parts methyl ethyl ketone peroxide, and 0.4 parts cobalt naphthenate solution. The filler in component A is composed of 140 parts of 100-mesh quartz powder and 104 parts of 80-mesh alumina. The filler in component B is a mixture of 101 parts of 200-mesh calcium carbonate and 100 parts of 80-mesh alumina.

[0031] Example 3 A low-temperature epoxy splicing adhesive for wind power hybrid towers is composed of isolated components A and B in a weight ratio of 3:1. Its preparation methods include: Component A: 45 parts of bisphenol A type epoxy resin (epoxy value 0.51), 52 parts of bisphenol F type epoxy resin (epoxy value 0.50), 10 parts of reactive diluent (butyl glycidyl ether), and 2.5 parts of epoxy coupling agent (glycidyl etheroxypropyltriethoxysilane) were added to a planetary mixer and mixed at 55°C for 50 min; then 9 parts of functional crosslinking agent, 3 parts of thixotropic agent (polyamide wax), 2.5 parts of toughening agent (calcium carbonate whiskers), and 2 parts of titanium dioxide were added and the mixture was stirred for another 25 min; finally, 282 parts of filler were added and the mixture was vacuum stirred for 80 min. Component B: 103 parts phenolic amine curing agent, 5 parts accelerator (dimethylaniline), and accelerators (2, 4, 6...) Tris(dimethylaminomethyl)phenol 7 parts, amino coupling agent (3 parts) Add 8 parts of aminopropyltriethoxysilane to a planetary mixer and mix at 50°C for 35 min; then add 3 parts of crosslinking initiator, 14 parts of thixotropic agent (polyamide wax), and 0.01 parts of carbon black and continue mixing for 40 min; finally add 264 parts of filler and vacuum mix for 85 min. The functional crosslinking agent is composed of 4 parts butyl acrylate, 4.7 parts tert-butylaminoethyl methacrylate, and 0.3 parts p-benzoquinone; The crosslinking initiator is composed of 2.4 parts toluene diisocyanate, 0.3 parts cyclohexanone peroxide, and 0.3 parts cobalt isooctanoate solution. The filler in component A is composed of 130 parts of 400-mesh quartz powder and 152 parts of 100-mesh quartz powder; The filler in component B is a mixture of 132 parts of 400-mesh quartz powder and 132 parts of 100-mesh quartz powder.

[0032] Example 4 A low-temperature epoxy splicing adhesive for wind power hybrid towers is composed of isolated components A and B in a weight ratio of 3.2:1. Its preparation methods include: Component A: 58 parts of bisphenol A type epoxy resin (epoxy value 0.54), 48 parts of bisphenol F type epoxy resin (epoxy value 0.48), 9 parts of reactive diluent (trimethylolpropane triglycidyl ether), and 2 parts of epoxy coupling agent (glycidyl etheroxypropyltriethoxysilane) were added to a planetary mixer and mixed at 40°C for 60 min; then 11 parts of functional crosslinking agent, 2 parts of thixotropic agent (hydrophobic fumed silica), 1.5 parts of toughening agent (calcium sulfate whiskers), and 3.5 parts of titanium dioxide were added and the mixture was stirred for another 35 min; finally, 228 parts of filler were added and the mixture was stirred under vacuum for 90 min. Component B: 120 parts phenolic amine curing agent, 7 parts accelerator (dimethylaniline), and accelerators (2, 4, 6...) Tris(dimethylaminomethyl)phenol 7 parts, amino coupling agent (N β (aminoethyl) γ 11 parts of aminopropyltrimethoxysilane were added to a planetary mixer and mixed at 45°C for 50 min; then 4 parts of crosslinking initiator, 18 parts of thixotropic agent (hydrophobic fumed silica), and 0.02 parts of carbon black were added and the mixture was stirred for 30 min; finally, 209 parts of filler were added and the mixture was stirred under vacuum for 60 min. The functional crosslinking agent is composed of 6 parts styrene, 4.5 parts tert-butylaminoethyl methacrylate, and 0.5 parts hydroquinone; The crosslinking initiator is composed of 3 parts diphenylmethane diisocyanate, 0.7 parts methyl ethyl ketone peroxide, and 0.3 parts cobalt octanoate solution; The filler in component A is composed of 104 parts of 400-mesh silica powder and 124 parts of 200-mesh calcium carbonate. The filler in component B is a mixture of 90 parts of 200-mesh quartz powder and 119 parts of 80-mesh alumina.

[0033] Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that no functional crosslinking agent was added to component A.

[0034] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that no crosslinking initiator was added to component B.

[0035] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that no functional crosslinking agent was added to component A and no crosslinking initiator was added to component B.

[0036] Comparative Example 4 The difference between Comparative Example 4 and Example 1 is that no functional olefin monomer was added to the functional crosslinking agent of component A.

[0037] Comparative Example 5 The difference between Comparative Example 5 and Example 1 is that no functional olefin monomer crosslinking agent was added to the crosslinking initiator of component B.

[0038] Comparative Example 6 The difference between Comparative Example 6 and Example 1 is that the promoter in component B is only 2,4,6. Tris(dimethylaminomethyl)phenol.

[0039] Comparative Example 7 The difference between Comparative Example 7 and Example 1 is that no toughening agent was added to component A.

[0040] Components A and B were mixed and stirred evenly according to the weight ratio, and then poured into the corresponding test molds. Thixotropy, bonding time, compressive strength, and steel-to-steel tensile shear strength were tested and evaluated for Examples 1-4 and Comparative Examples 1-7 above. The specific results are shown in Table 1.

[0041] Table 1 Performance test results of Examples 1-4 and Comparative Examples 1-7 The performance test results in Table 1 above show that: Comparing Examples 1-4 and Comparative Examples 1-7, it can be found that the low-temperature epoxy splicing adhesive for wind power hybrid towers prepared by the present invention has good construction performance and mechanical strength at low temperatures, meeting the corresponding technical requirements of T / CECS 10080 / 2020 "Epoxy Adhesives for Precast Segment Assembly".

[0042] Comparing Example 1 with Comparative Examples 1 and 3, it can be seen that the addition of the functional crosslinking agent can significantly reduce the viscosity of component A at low temperatures, improving the problems of resin crystallization and lack of flowability. The crosslinking agent reacts rapidly at low temperatures, releasing heat and improving the mechanical strength of the epoxy adhesive.

[0043] Comparing Example 1 and Comparative Examples 1-6 reveals that the combined addition of the functional crosslinking agent and the crosslinking initiator is crucial for enhancing the early strength of the prepared epoxy adhesive at low temperatures; the absence of either one leads to a decrease in mechanical properties. This is because, on the one hand, the initiator and initiation accelerator in component B can rapidly release free radicals to initiate the polymerization of the functional olefin monomers in component A under the promotion of dimethylaniline; on the other hand, the hindered urea bond in the functional olefin monomer tert-butylaminoethyl methacrylate in component A exhibits extremely high reactivity at low temperatures, and the crosslinking agent isocyanate in component B can attack nitrogen atoms to form hindered urea bonds. These two types of rapid chemical reactions release heat, lowering the activation energy for adhesive curing at low temperatures and significantly improving the early curing speed of the adhesive in the -10~0℃ environment.

[0044] Comparing Example 1 and Comparative Example 7, it can be found that the addition of toughening agent can further increase the later strength of epoxy splicing adhesive. This is because it improves the brittleness of splicing adhesive at low temperature, making it less prone to stress concentration and premature cracking.

[0045] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A low-temperature epoxy splicing adhesive for wind power hybrid towers, characterized in that, Includes component A and component B; Component A comprises the following raw materials in parts by weight: 40-70 parts of bisphenol A type epoxy resin 30-60 parts of bisphenol F type epoxy resin, 5-15 parts of reactive diluent 5-20 parts of functional crosslinking agent 0.5-3 parts of epoxy coupling agent, Thixotropic agent 1-4 parts, Toughening agent 0.5-3 parts, 1-5 parts titanium dioxide 180-320 parts of filler; The functional crosslinking agent is composed of an olefin crosslinking agent, a functional olefin monomer, and a polymerization inhibitor in a mass ratio of 3~20:2~10:0.1~0.5; Component B comprises the following raw materials in parts by weight: 80-140 parts of phenolic amine curing agent Accelerator 5-30 parts, 4-20 parts of thixotropic agent 2-10 parts of crosslinking initiator 5-14 parts of amino coupling agent, Carbon black 0.005~0.1 parts, 180-280 parts of filler; The crosslinking initiator is composed of a functional olefin monomer crosslinking agent, an initiator, and an initiation promoter in a mass ratio of 2~10:0.3~1:0.3~1.

2. The epoxy splicing adhesive for low-temperature wind power hybrid towers according to claim 1, characterized in that, The epoxy splicing adhesive for the low-temperature wind power hybrid tower is composed of component A and component B in a mass ratio of 2.6~3.2:

1.

3. The epoxy splicing adhesive for low-temperature wind power hybrid towers according to claim 1, characterized in that, The epoxy value of the bisphenol A type epoxy resin is 0.51~0.55 mol / 100g; The epoxy value of the bisphenol F type epoxy resin is 0.44~0.55 mol / 100g; The active diluent is selected from any one or a mixture of phenyl glycidyl ether, benzyl glycidyl ether, butyl glycidyl ether, 1,4-butanediol diglycidyl ether, and trimethylolpropane triglycidyl ether, and is more preferably a mixture of benzyl glycidyl ether and 1,4-butanediol diglycidyl ether. The epoxy coupling agent is selected from any one or a mixture of more than one of glycidyl etheroxypropyltrimethoxysilane and glycidyl etheroxypropyltriethoxysilane. The toughening agent is selected from any one or a mixture of one or more of the following: carboxyl-terminated liquid nitrile rubber, liquid polysulfide rubber, calcium carbonate whiskers, and calcium sulfate whiskers.

4. The epoxy splicing adhesive for low-temperature wind power hybrid towers according to claim 1, characterized in that, In the functional crosslinking agent, the olefin crosslinking agent is selected from any one or a mixture of more than one of styrene, methyl acrylate, methyl methacrylate, and butyl acrylate; The functional olefin monomer is tert-butylaminoethyl methacrylate; The polymerization inhibitor is selected from any one of hydroquinone, methylhydroquinone, and p-benzoquinone.

5. The epoxy splicing adhesive for low-temperature wind power hybrid towers according to claim 1, characterized in that, The active hydrogen equivalent of the phenolic amine curing agent is 60~78 g / eq; The accelerator is a mixture of dimethylaniline and 2,4,6-tris(dimethylaminomethyl)phenol in a mass ratio of 0.5 to 1.2:1; The amino coupling agent is selected from any one or a mixture of one or more of 3-aminopropyltriethoxysilane and N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane.

6. The low-temperature epoxy splicing adhesive for wind power hybrid towers according to claim 1, characterized in that, In the crosslinking initiator, the functional olefin monomer crosslinking agent is selected from any one or a mixture of more than one of hexamethylene diisocyanate, isophorone diisocyanate, toluene diisocyanate, and diphenylmethane diisocyanate; The initiator is selected from any one or a mixture of one or more of methyl ethyl ketone peroxide and cyclohexanone peroxide; The initiation promoter is selected from any one or a mixture of one or more of cobalt isooctanoate solution, cobalt naphthenate solution, and cobalt octanoate solution.

7. The epoxy splicing adhesive for low-temperature wind power hybrid towers according to claim 1, characterized in that, In components A and B, the thixotropic agents are each independently selected from any one or a mixture of one or more of hydrophobic fumed silica, organobentonite, and polyamide wax. In components A and B, the fillers are each independently selected from any one or more of quartz powder, calcium carbonate, silica powder, and alumina, preferably with a mesh size of 60 to 400 mesh.

8. The epoxy splicing adhesive for low-temperature wind power hybrid towers according to claim 1, characterized in that, The titanium dioxide is rutile titanium dioxide; The carbon black is a colorant carbon black.

9. A method for preparing the low-temperature type epoxy splicing adhesive for wind power hybrid towers according to any one of claims 1 to 8, characterized in that, Includes the following steps: (1) Preparation of component A: Weigh the raw materials used in the resin system of component A according to the weight parts; add bisphenol A type epoxy resin, bisphenol F type epoxy resin, reactive diluent and epoxy coupling agent into a mixer and mix evenly; add functional crosslinking agent, thixotropic agent, toughening agent and titanium dioxide and continue stirring; add filler and stir evenly under vacuum to obtain component A; (2) Preparation of component B: Weigh the raw materials used in the curing system of component B according to the weight parts; add phenolic amine curing agent, accelerator and amino coupling agent to a mixer and mix evenly; add crosslinking initiator, thixotropic agent and carbon black and continue stirring; add filler and stir evenly under vacuum to obtain component B; (3) When using, mix component A and component B evenly to obtain the low-temperature type epoxy splicing adhesive for wind power hybrid towers.

10. The preparation method according to claim 9, characterized in that, The mixer is a planetary mixer; In steps (1) and (2), the mixing time is independently selected as 30-60 min, the stirring time is independently selected as 20-40 min, the stirring temperature is independently selected as 40-60 ℃, and the vacuum stirring time is independently selected as 60-90 min.

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