Ultrahigh-strength epoxy structure adhesive for wind power mixing tower and preparation method of ultrahigh-strength epoxy structure adhesive

Abstract

The invention belongs to the field of structural adhesives, and particularly relates to an ultrahigh-strength epoxy structural adhesive for a wind power mixing tower and a preparation method of the ultrahigh-strength epoxy structural adhesive. The ultrahigh-strength epoxy structure adhesive for the wind power mixing tower comprises the following raw materials in parts by weight: 45-55 parts of an epoxy resin matrix, 8-12 parts of a curing agent, 18-22 parts of a toughening agent, 13-17 parts of filler and 4-6 parts of a coupling agent. The ultrahigh-strength epoxy structure adhesive for the wind power mixing tower has excellent mechanical performance, aging resistance and fatigue resistance, the epoxy resin matrix and the curing agent can be subjected to a cross-linking reaction to form a three-dimensional network structure, the toughening agent can improve the toughness and impact resistance of the material, and the curing agent can be used for curing the ultrahigh-strength epoxy structure adhesive for the wind power mixing tower. The filler can further improve the strength and wear resistance of the material, and finally the coupling agent improves the interface bonding force of the material. The preparation method disclosed by the invention is simple to operate, convenient to construct and beneficial to large-scale popularization.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of structural adhesives, and particularly relates to an ultrahigh-strength epoxy structural adhesive for a wind power hybrid tower and a preparation method thereof. BACKGROUND

[0002] As an important component of wind power generation equipment, the structural stability of the wind power hybrid tower directly affects the safety and service life of the wind turbine generator. With the rapid development of the wind power industry, the height and scale of the wind power hybrid tower are increasing, and the performance requirements of the structural connecting materials thereof are also increasing.

[0003] To solve the structural connection problem of the wind power hybrid tower, the prior art mainly adopts the following two schemes: one is high-strength bolt connection, which realizes structural connection through pretightening force, has the advantage of high connection strength, but has the disadvantages of complex construction, easy loosening of the bolt, poor corrosion resistance, etc.; the other is welding technology, which realizes structural connection through molten metal, has the advantage of high connection strength, but has the disadvantages of large welding deformation, easy cracking of the weld, high requirements for the construction environment, etc. In addition, as a new type of connecting material, the epoxy structural adhesive is gradually applied in the field of wind power hybrid towers due to its advantages of simple construction, high connection strength, good weather resistance, etc., but the existing epoxy structural adhesive materials still have deficiencies in ultrahigh strength, aging resistance, fatigue resistance, etc.

[0004] In summary, since the high-strength bolt connection has the problems of complex construction, easy loosening of the bolt, poor corrosion resistance, etc.; the welding technology has the problems of large welding deformation, easy cracking of the weld, high requirements for the construction environment, etc.; and the existing epoxy structural adhesive materials still have deficiencies in ultrahigh strength, aging resistance, fatigue resistance, etc., it is difficult to meet the long-term use requirements of the wind power hybrid tower in harsh environments such as high wind pressure, high humidity, high salt fog, etc.

[0005] Therefore, based on this, the technical scheme of the present application is proposed. SUMMARY

[0006] In order to solve the problems existing in the prior art, the present application provides an ultrahigh-strength epoxy structural adhesive for a wind power hybrid tower, characterized in that it comprises the following raw materials in parts by weight: an epoxy resin matrix 45-55 parts, a curing agent 8-12 parts, a toughening agent 18-22 parts, a filler 13-17 parts, and a coupling agent 4-6 parts.

[0007] Preferably, the ultrahigh-strength epoxy structural adhesive for a wind power hybrid tower comprises the following raw materials in parts by weight: an epoxy resin matrix 50 parts, a curing agent 10 parts, a toughening agent 20 parts, a filler 15 parts, and a coupling agent 5 parts.

[0008] Preferably, the epoxy resin matrix is a bisphenol A type epoxy resin.

[0009] And / or, the curing agent is an amine curing agent.

[0010] And / or, the toughening agent is a polyurethane elastomer, an acrylate elastomer or a nano rubber particle;

[0011] And / or, the filler is a silica powder or an alumina powder;

[0012] And / or, the coupling agent is a silane coupling agent or a titanate coupling agent.

[0013] Preferably, the bisphenol A type epoxy resin is DER 669-20 (manufacturer: Dow) or E51 (manufacturer: Sanmu, Jiangsu).

[0014] Preferably, the amine curing agent is one of diethylenetriamine, diaminodiphenyl methane or isophorone diamine.

[0015] Preferably, the polyurethane elastomer is Elastollan 1185A, Elastollan 900 (manufacturer: BASF) or Desmopan DP 2590A (manufacturer: Covestro);

[0016] And / or, the acrylate elastomer is Nipol AR31 (manufacturer: Japan Zeon), Denka ER-508C (manufacturer: Denki Kagaku) or Vamac G (manufacturer: DuPont, USA).

[0017] Preferably, the average particle size of the silica powder is 50-80 nm;

[0018] And / or, the average particle size of the alumina powder is 15-25 nm.

[0019] Preferably, the silane coupling agent is gamma-aminopropyl triethoxysilane.

[0020] And / or, the titanate coupling agent is triisostearyl titanate isopropyl or isopropyl trioleate acyloxy titanate.

[0021] Based on the same technical concept, the scheme of the present application is to further provide a preparation method of the wind power mixed tower ultra-high strength epoxy structural adhesive, which comprises the following steps:

[0022] (1) mixing an epoxy resin matrix and a curing agent to obtain a preliminary mixture;

[0023] (2) adding a toughening agent, a filler and a coupling agent to the preliminary mixture, and then stirring uniformly and curing.

[0024] Preferably, the curing time is 20-30 h.

[0025] In addition, it should be noted that in actual operation, after all the raw materials are mixed, the structural adhesive is uniformly coated on the wind power mixed tower connecting part, and then fully cured, and then subsequent construction can be carried out.

[0026] The beneficial effects of the present application are:

[0027] 1、The wind power mixed tower ultra-high strength epoxy structural adhesive has excellent mechanical properties, aging resistance and fatigue resistance, wherein: the epoxy resin matrix and the curing agent can undergo crosslinking reaction to form a three-dimensional network structure, the toughening agent can improve the toughness and impact resistance of the material, the filler can further improve the strength and wear resistance of the material, and the coupling agent improves the interfacial bonding force of the material.

[0028] 2、The preparation method is simple to operate, convenient for construction, and can be beneficially popularized on a large scale. DETAILED DESCRIPTION

[0029] To make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0030] Embodiment 1

[0031] The present embodiment provides a preparation method of a wind power mixed tower ultra-high strength epoxy structural adhesive, which comprises the following steps:

[0032] (1) Mix the epoxy resin matrix and the curing agent to obtain a preliminary mixture;

[0033] (2) Add the toughening agent, filler and coupling agent to the preliminary mixture, stir and uniformly coat it on the wind power mixed tower connecting part, and it can be cured after 20 hours.

[0034] The types and amounts of raw materials used in this embodiment are shown in Table 1:

[0035] Table 1

[0036] Raw material Specific name Amount (kg) Epoxy resin matrix DER 669-20 45 Curing agent Diethylenetriamine 8 Toughening agent Elastollan 1185A 18 Filling agent Microsilica (average particle size 60 nm) 13 Coupling agent γ-Aminopropyl triethoxysilane 4

[0037] Embodiment 2

[0038] The present embodiment provides a preparation method of a wind power mixed tower ultra-high strength epoxy structural adhesive, which comprises the following steps:

[0039] (1) Mix the epoxy resin matrix and the curing agent to obtain a preliminary mixture;

[0040] (2) adding a toughening agent, a filler and a coupling agent to the initial mixture, and then uniformly applying the mixture to the connection part of the wind power tower after stirring, and allowing the mixture to solidify for 30 hours.

[0041] The types and amounts of raw materials used in this example are shown in Table 2:

[0042] Table 2

[0043]

[0044] Example 3

[0045] The present example provides a preparation method of an ultra-high strength epoxy structural adhesive for a wind power tower, the preparation method comprising the following steps:

[0046] (1) mixing an epoxy resin matrix and a curing agent to obtain an initial mixture;

[0047] (2) adding a toughening agent, a filler and a coupling agent to the initial mixture, and then uniformly applying the mixture to the connection part of the wind power tower after stirring, and allowing the mixture to solidify for 25 hours.

[0048] The types and amounts of raw materials used in this example are shown in Table 3:

[0049] Table 3

[0050] Raw material Specific name Amount (kg) Epoxy resin matrix DER 669-20 50 Curing agent Isophorone diamine 10 Toughening agent Nipol AR31 20 Filling agent Alumina powder (average particle size 20 nm) 15 Coupling agent Isopropyl trioleate titanate 5

[0051] Comparative Example 1

[0052] The present example provides a preparation method of an ultra-high strength epoxy structural adhesive for a wind power tower, the preparation method comprising the following steps:

[0053] (1) mixing an epoxy resin matrix and a curing agent to obtain an initial mixture;

[0054] (2) adding a toughening agent, a filler and a coupling agent to the initial mixture, and then uniformly applying the mixture to the connection part of the wind power tower after stirring, and allowing the mixture to solidify for 25 hours.

[0055] The types and amounts of raw materials used in this example are shown in Table 3:

[0056] Table 3

[0057] Raw material Specific name Amount (kg) Epoxy resin matrix DER 669-20 50 Curing agent Isophorone diamine 10 Filling agent Alumina powder (average particle size 20 nm) 15 Coupling agent Isopropyl trioleate titanate 5

[0058] The difference between Comparative Example 1 and Example 3 is that no toughening agent is added in Comparative Example 1.

[0059] Comparative Example 2

[0060] The present example provides a preparation method of an ultra-high strength epoxy structural adhesive for a wind power tower, the preparation method comprising the following steps:

[0061] (1) mixing the epoxy resin matrix and the curing agent to obtain a preliminary mixture;

[0062] (2) adding the toughening agent and the coupling agent to the preliminary mixture, and then uniformly applying the mixture to the connecting part of the wind power tower, and curing for 25 hours.

[0063] The types and amounts of raw materials used in the example are shown in Table 5:

[0064] Table 5

[0065]

[0066]

[0067] The difference between Comparative Example 2 and Example 3 is that no filler is added in Comparative Example 2.

[0068] Comparative Example 3

[0069] The present comparative example provides a preparation method of an epoxy structural adhesive, which comprises the following steps:

[0070] (1) mixing the epoxy resin matrix and the curing agent to obtain a preliminary mixture;

[0071] (2) adding the toughening agent and the filler to the preliminary mixture, and then uniformly applying the mixture to the connecting part of the wind power tower, and curing for 25 hours.

[0072] The types and amounts of raw materials used in the example are shown in Table 6:

[0073] Table 6

[0074] Raw material Specific name Amount (kg) Epoxy resin matrix DER 669-20 50 Curing agent Isophorone diamine 10 Toughening agent Nipol AR31 20 Filling agent Alumina powder (average particle size 20 nm) 15

[0075] The difference between Comparative Example 3 and Example 3 is that no coupling agent is added in Comparative Example 3.

[0076] Effect verification example

[0077] Examples 1-3 and Comparative Examples 1-3 are verified, and the properties of the epoxy structural adhesive are shown in Table 7.

[0078] Table 7

[0079]

[0080] Note: The aging resistance refers to the strength retention rate after 1000 hours of ultraviolet aging test. The fatigue resistance refers to the strength retention rate after 100 million equivalent cycle load tests.

[0081] As shown in Table 7, the wind power hybrid tower ultra-high strength epoxy structural adhesive has excellent mechanical properties, the tensile strength can reach more than 80 MPa, the shear strength can reach more than 50 MPa, and can meet the high strength connection requirements of the wind power hybrid tower. In addition, the wind power hybrid tower ultra-high strength epoxy structural adhesive has excellent aging resistance, after 1000 hours of ultraviolet aging test, the strength retention rate is more than 90%, which can meet the use requirements of the wind power hybrid tower in long-term exposure environment. Finally, the wind power hybrid tower ultra-high strength epoxy structural adhesive has excellent fatigue resistance, after equivalent 100 million cycle load test, the strength retention rate is more than 85%, which can meet the use requirements of the wind power hybrid tower in long-term vibration environment. Its comprehensive performance is much better than the comparative example.

[0082] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A kind of wind power mixed tower with ultra-high strength epoxy structural adhesive, it is characterized by, The raw materials include the following components by weight: an epoxy resin matrix 45-55 parts, a curing agent 8-12 parts, a toughening agent 18-22 parts, a filler 13-17 parts, and a coupling agent 4-6 parts.

2. The epoxy structural adhesive according to claim 1, wherein the epoxy structural adhesive has a tensile strength of 50 MPa or more, a tensile modulus of 2,000 MPa or more, and a glass transition temperature of 80°C or more. The raw materials include the following components by weight: an epoxy resin matrix 50 parts, a curing agent 10 parts, a toughening agent 20 parts, a filler 15 parts, and a coupling agent 5 parts.

3. The epoxy structural adhesive according to claim 1 or 2, wherein the epoxy structural adhesive is used for a wind power hybrid tower. The epoxy resin matrix is a bisphenol A type epoxy resin. The curing agent is an amine type curing agent. The toughening agent is a polyurethane elastomer, an acrylic elastomer, or nano rubber particles. The filler is a silicon micro powder or an alumina powder. The coupling agent is a silane coupling agent or a titanate coupling agent.

4. The epoxy structural adhesive according to claim 3, wherein the epoxy structural adhesive is used for a wind power hybrid tower. The bisphenol A type epoxy resin is DER 669-20 or E51.

5. The epoxy structural adhesive according to claim 3, wherein the epoxy structural adhesive is used for a wind power hybrid tower. The amine type curing agent is one of diethylene triamine, diaminodiphenyl methane, or isophorone diamine.

6. The epoxy structural adhesive according to claim 3, wherein the epoxy structural adhesive is used for a wind power hybrid tower. The polyurethane elastomer is Elastollan 1185A, Elastollan 900, or Desmopan DP 2590A. The acrylic elastomer is Nipol AR31, Denka ER-508C, or Vamac G.

7. The epoxy structural adhesive according to claim 3, wherein the epoxy structural adhesive is used for a wind power hybrid tower. The average particle size of the micro silicon powder is 50-80 nm. The average particle size of the alumina powder is 15-25 nm.

8. The epoxy structural adhesive according to claim 3, wherein the epoxy structural adhesive is used for a wind power hybrid tower. The silane coupling agent is γ-aminopropyl triethoxysilane. The titanate coupling agent is triisostearyl titanate isopropyl or isopropyl trioleate acyloxy titanate.

9. The method for preparing the epoxy structural adhesive with ultra-high strength for wind power hybrid tower according to any one of claims 1-8, characterized in that, The preparation method includes the following steps: (1) mixing the epoxy resin matrix and the curing agent to obtain a preliminary mixture; (2) adding the toughening agent, the filler, and the coupling agent to the preliminary mixture, and then stirring until uniform, and curing.

10. The method of claim 9, wherein the epoxy structural adhesive for a wind power hybrid tower has a tensile strength of 50 MPa or more, a tensile modulus of 2,000 MPa or more, and a glass transition temperature of 100°C or more. The curing time is 20-30 hours.

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