High-weather-resistance long-acting anticorrosive epoxy coating for inner wall of wind power tower and preparation method thereof
阅读说明：本技术 一种高耐候风电塔筒内壁长效防腐环氧涂料及其制备方法 (High-weather-resistance long-acting anticorrosive epoxy coating for inner wall of wind power tower and preparation method thereof ) 是由 康瑞瑞 彭毛来 李至秦 魏金伯 李陈郭 于 2021-06-11 设计创作，主要内容包括：本发明涉及化工材料技术领域,特别涉及一种高耐候风电塔筒内壁长效防腐环氧涂料及其制备方法,其中包括甲组分和乙组分,其中,甲组分包括了：改性环氧树脂A、活性稀释剂、环氧树脂B、分散剂、流平剂、紫外光吸收剂、受阻胺类光稳定剂、金红石型钛白、改性纳米铁钛粉、物理防锈填料、体质填料、触变剂、溶剂；乙组分包括了：改性聚酰胺固化剂、硅烷偶联剂、氢化双酚A环氧树脂、K54、溶剂。本发明从成膜物、助剂、粉料体系的多重协同作用,经各组分用量优化,有效提高了传统环氧涂料的耐候性能,满足了风电塔筒配套体系防腐需求与耐候需求,具有重要的实际应用价值。(The invention relates to the technical field of chemical materials, in particular to a long-acting anticorrosive epoxy coating for the inner wall of a high-weather-resistance wind power tower cylinder and a preparation method thereof, wherein the long-acting anticorrosive epoxy coating comprises a component A and a component B, wherein the component A comprises the following components: modified epoxy resin A, an active diluent, epoxy resin B, a dispersant, a flatting agent, an ultraviolet absorber, a hindered amine light stabilizer, rutile titanium white, modified nano-ferrotitanium powder, a physical antirust filler, an extender, a thixotropic agent and a solvent; the component B comprises: modified polyamide curing agent, silane coupling agent, hydrogenated bisphenol A epoxy resin, K54 and solvent. According to the invention, the multiple synergistic effect of the film forming material, the auxiliary agent and the powder system is adopted, the dosage of each component is optimized, the weather resistance of the traditional epoxy coating is effectively improved, the anticorrosion requirement and the weather resistance requirement of a wind power tower cylinder matching system are met, and the coating has important practical application value.)
1. The long-acting anticorrosive epoxy coating for the inner wall of the high-weather-resistance wind power tower cylinder is characterized by comprising a component A and a component B, wherein the component A comprises:
modified epoxy resin A, an active diluent, epoxy resin B, a dispersant, a flatting agent, an ultraviolet absorber, a hindered amine light stabilizer, rutile titanium white, modified nano-ferrotitanium powder, a physical antirust filler, an extender, a thixotropic agent and a solvent;
the component B comprises:
modified polyamide curing agent, silane coupling agent, hydrogenated bisphenol A epoxy resin, K54 and solvent;
wherein the nano silicon dioxide modified epoxy resin A is as follows: epoxy resin A, coupling agent, nano silicon dioxide and CCl4Stirring in a container, heating for reaction, keeping the temperature for a period of time, cooling to 70-80 ℃, and adding CCl in the container4Removing to obtain;
the modified nano ferrotitanium powder comprises the following components: nano ferrotitanium powder, coupling agent, 1, 6-hexanediol diglycidyl ether and CCl4Stirring and heating up the mixture in a container, keeping the temperature for a period of time, then cooling to 70-80 ℃, and adding CCl in the container4Removing to obtain the product.
2. The long-acting anticorrosive epoxy coating for the inner wall of the high-weather-resistance wind power tower cylinder as claimed in claim 1, wherein: the component A comprises 9-25 parts of modified epoxy resin A, 8-15 parts of epoxy resin B, 3-8 parts of active diluent, 0.1-1 part of dispersant, 0.1-1 part of flatting agent, 0.05-0.5 part of ultraviolet absorber, 0.05-0.5 part of hindered amine light stabilizer, 10-30 parts of rutile titanium white, 10-20 parts of modified nano-ferrotitanium powder, 5-15 parts of physical antirust filler, 10-20 parts of extender filler and 0.5-1.5 parts of thixotropic agent by weight;
the component B comprises 75-90 parts of modified polyamide curing agent, 1-2 parts of silane coupling agent, 1-5 parts of hydrogenated bisphenol A epoxy resin, 540.1-0.4 part of K and 5-15 parts of solvent;
the use ratio of the component A to the component B is as follows: 2:1 to 5: 1.
3. The high weather-resistant long-acting anticorrosive epoxy coating for inner walls of wind power towers according to claim 1The method is characterized in that: in the nano silicon dioxide modified epoxy resin A, the epoxy resin A, a coupling agent, nano silicon dioxide and CCl4The dosage ratio is as follows according to the weight portion: 78-81: 2-4: 3-6: 11 to 13.
4. The long-acting anticorrosive epoxy coating for the inner wall of the high-weather-resistance wind power tower cylinder as claimed in claim 1, wherein: in the modified nano ferrotitanium powder, a coupling agent, 1, 6-hexanediol diglycidyl ether and CCl4The ratio of (A) to (B) is 4-6: 2-4: 7-9: 25 to 35.
5. The long-acting anticorrosive epoxy coating for the inner wall of the high-weather-resistance wind power tower cylinder as claimed in claim 1, wherein: the epoxy resin A is bisphenol epoxy resin with the epoxy equivalent of 180-200 g/eq; the active diluent is a low molecular weight epoxy compound with the epoxy equivalent of 150-500 g/eq; the epoxy resin B is bisphenol epoxy resin with the epoxy equivalent of 200-300 g/eq; the epoxy equivalent of the hydrogenated bisphenol A epoxy resin is 180-200 g/eq.
6. The long-acting anticorrosive epoxy coating for the inner wall of the high-weather-resistance wind power tower cylinder as claimed in claim 1, wherein: such dispersants include, but are not limited to, BYK-110, Youka 710S; the leveling agent includes, but is not limited to, BYK-354, Youka 384S.
7. The long-acting anticorrosive epoxy coating for the inner wall of the high-weather-resistance wind power tower cylinder as claimed in claim 1, wherein: the ultraviolet light absorber comprises at least one of Tinuvin400 and Tinuvin 384-2; the hindered amine light stabilizer comprises at least one of Tinuvin292 and Tinuvin 249.
8. The long-acting anticorrosive epoxy coating for the inner wall of the high-weather-resistance wind power tower cylinder as claimed in claim 1, wherein: the physical antirust pigment is sericite powder, including wet-process sericite powder and dry-process sericite powder; the filler is one or a mixture of talcum powder and feldspar powder; the thixotropic agent is one or two of polyamide wax and organic bentonite.
9. The long-acting anticorrosive epoxy coating for the inner wall of the high-weather-resistance wind power tower cylinder as claimed in claim 1, wherein: the amine value of the modified polyamide curing agent is 200-250 mgKOH/g, and the viscosity at 25 ℃ is 3000-5000 cp.
10. The preparation method of the high weather-resistant long-acting anticorrosive epoxy coating for the inner wall of the wind power tower cylinder according to any one of claims 1 to 9, characterized by comprising the following steps:
step a, adding modified epoxy resin A, epoxy resin B, an active diluent, a dispersing agent, a leveling agent, an ultraviolet light absorber and a hindered amine light stabilizer into a dispersing container under the low-speed stirring of 300-800 rpm, and dispersing for 5-10 min at the low speed of 300-800 rpm;
b, adding rutile titanium dioxide, modified nano ferrotitanium powder, physical antirust pigment and extender pigment, and dispersing at high speed at 800-1500 rpm until the fineness is less than or equal to 60 microns;
c, adding a thixotropic agent into the mixture obtained in the step c for dispersing;
d, adding the solvent for dispersion, and filtering to obtain the component A;
the preparation method of the component B comprises the following steps:
adding a modified polyamide curing agent, a silane coupling agent, hydrogenated bisphenol A epoxy resin, K54 and a solvent into a dispersion cylinder under low-speed stirring, preserving the heat for 4.5-5 hours at the temperature of 40-50 ℃ at 300-500 rpm, and filtering to obtain a component B.
Technical Field
The invention relates to the technical field of chemical materials, and particularly relates to a high-weather-resistance long-acting anticorrosive epoxy coating for an inner wall of a wind power tower and a preparation method thereof.
Background
As a typical clean energy, wind power can save a large amount of non-renewable resources such as coal, petroleum and the like, and has extremely important economic value, and domestic wind power installed capacity is ranked the third in the whole power generation installed capacity. Most of fan equipment is in a C3-CX corrosion environment, the protection of the fan equipment has requirements of corrosion resistance and weather resistance, and national standard GB/T31817 and 2015 technical specification of protective coating of wind power generation facilities provides clear requirements for a protective coating system of a wind power tower in a C3 and C4 corrosion environment, which is shown in Table 1.
Table 1 GB/T31817-2015C 3 and C4 corrosion environment wind power tower coating system matching requirements
As can be seen from Table 1, the inner and outer walls of the C3 corrosive environment and the inner wall of the C4 corrosive environment are all coated with epoxy thick paste. In the actual assembly process of the fan equipment, the wind power tower cylinder is usually placed outdoors for about half a year before being transported to the site for assembly, so that the epoxy coating on the inner wall needs to have high corrosion resistance and good weather resistance, and otherwise, obvious color change and pulverization (oblique sunlight) can occur in the placing process for half a year.
Disclosure of Invention
In order to solve the problems of corrosion resistance and weather resistance of the wind power tower barrel coating in the background art, the invention discloses a long-acting anticorrosive epoxy coating for the inner wall of a high-weather-resistance wind power tower barrel.
In one embodiment, the composition comprises a component A and a component B, wherein the component A comprises:
modified epoxy resin A, an active diluent, epoxy resin B, a dispersant, a flatting agent, an ultraviolet light absorber, a hindered amine light stabilizer, rutile titanium white, modified nano-ferrotitanium powder, a physical antirust filler, an extender filler, a thixotropic agent and a solvent;
the component B comprises:
modified polyamide curing agent, silane coupling agent, hydrogenated bisphenol A epoxy resin, K54 and solvent;
wherein the nano silicon dioxide modified epoxy resin A is as follows: epoxy resin A, coupling agent, nano silicon dioxide and CCl4Stirring and heating up the mixture in a container, wherein the heating up temperature is preferably 100 ℃ or about 100 ℃, keeping the temperature for a period of time, cooling to 70-80 ℃, and carrying out CCl (carbon dioxide gel) in the container4Removing to obtain; more specifically, the epoxy resin composition comprises 78-81 parts of epoxy resin A, 2-4 parts of KH-560, 3-6 parts of nano silicon dioxide and 11-13 parts of CCl4And the heat preservation time is 2.5-3 h.
The modified nano ferrotitanium powder comprises the following components: nano ferrotitanium powder, coupling agent, 1, 6-hexanediol diglycidyl ether and CCl4Stirring and heating reaction in a container, wherein the heating temperature is preferably 100 ℃ or about 100 ℃, keeping the temperature for a period of time, then cooling to 70-80 ℃, and carrying out CCl (carbon dioxide gel) reaction in the container4Removing to obtain, and more specifically, the preferable scheme comprises 4-6 parts of nano ferrotitanium powder, 2-4 parts of KH-560, 7-9 parts of 1, 6-hexanediol diglycidyl ether and 20-25 parts of CCl4And the heat preservation time is 2.5-3 h.
On the basis of the scheme, in a preferred embodiment, the component A comprises 9-25 parts of modified epoxy resin A, 8-15 parts of epoxy resin B, 3-8 parts of reactive diluent, 0.1-1 part of dispersant, 0.1-1 part of flatting agent, 0.05-0.5 part of ultraviolet absorber, 0.05-0.5 part of hindered amine light stabilizer, 10-30 parts of rutile titanium dioxide, 10-20 parts of modified nano ferrotitanium powder, 5-15 parts of physical antirust filler, 10-20 parts of extender filler and 0.5-1.5 parts of thixotropic agent by weight;
the component B comprises 75-90 parts of modified polyamide curing agent, 1-2 parts of silane coupling agent, 1-5 parts of hydrogenated bisphenol A epoxy resin, 540.1-0.4 part of K and 5-15 parts of solvent;
the use ratio of the component A to the component B is as follows: 2:1 to 5: 1.
Based on the above scheme, in a preferred embodiment, in the nano-silica modified epoxy resin a, the coupling agent, the nano-silica, and the CCl4The dosage ratio is as follows according to the weight portion: 78-81: 2-4: 3-6: 11-13; the coupling agent is preferably KH-560.
On the basis of the above scheme, in a preferred embodiment, in the modified nano-ferrotitanium powder, a coupling agent, 1, 6-hexanediol diglycidyl ether, and CCl4The proportion of (A) is as follows: 4-6: 2-4: 7-9: 25-35; the coupling agent is preferably KH-560.
On the basis of the above scheme, in a preferred embodiment, the epoxy resin a is a bisphenol epoxy resin with an epoxy equivalent of 180-200 g/eq; the active diluent is a low molecular weight epoxy compound with the epoxy equivalent of 150-500 g/eq, preferably 660A; the epoxy resin B is bisphenol epoxy resin with the epoxy equivalent of 200-300 g/eq; the epoxy equivalent of the hydrogenated bisphenol A epoxy resin is 180-200 g/eq.
Based on the above scheme, in a preferred embodiment, the dispersant includes, but is not limited to, BYK-110, Youka 710S; the leveling agent includes, but is not limited to, BYK-354, Youka 384S.
Based on the above solution, in a preferred embodiment, the ultraviolet light absorber includes, but is not limited to, Tinuvin400, Tinuvin 384-2; the hindered amine light stabilizer includes, but is not limited to, Tinuvin292, Tinuvin 249.
On the basis of the above scheme, in a preferred embodiment, the physical antirust pigment is sericite powder, including wet-process sericite powder and dry-process sericite powder; the filler is one or a mixture of talcum powder and feldspar powder; the thixotropic agent is one or two of polyamide wax and organic bentonite.
On the basis of the scheme, in a preferred embodiment, the amine value of the modified polyamide curing agent is 200-250 mgKOH/g, and the viscosity at 25 ℃ is 3000-5000 cp; that is, the modified polyamide curing agent in the prior art, which has been modified to have an amine value satisfying the condition, is the inventive concept of the present invention, and specifically, the modified polyamide curing agent is, but not limited to, 8700-D curing agent.
The invention also provides a preparation method of the high-weather-resistance long-acting anticorrosive epoxy coating for the inner wall of the wind power tower cylinder, which comprises the following steps:
step a, adding modified epoxy resin A, epoxy resin B, an active diluent, a dispersing agent, a leveling agent, an ultraviolet light absorber and a hindered amine light stabilizer into a dispersing container under the low-speed stirring of 300-800 rpm, and dispersing for 5-10 min at the low speed of 300-800 rpm;
b, adding rutile titanium dioxide, modified nano ferrotitanium powder, physical antirust pigment and extender pigment, and dispersing at high speed at 800-1500 rpm until the fineness is less than or equal to 60 microns;
c, adding a thixotropic agent into the mixture obtained in the step c for dispersing;
d, adding the solvent for dispersion, and filtering to obtain the component A;
the preparation method of the component B comprises the following steps:
adding a modified polyamide curing agent, a silane coupling agent, hydrogenated bisphenol A epoxy resin, K54 and a solvent into a dispersion cylinder under low-speed stirring, preserving the heat for 4.5-5 hours at the temperature of 40-50 ℃ at 300-500 rpm, and filtering to obtain a component B.
The embodiment of the invention provides a high-weather-resistance long-acting anticorrosive epoxy coating for the inner wall of a wind power tower and a preparation method thereof, wherein the preparation method comprises the following steps:
in the scheme of one embodiment, the surface modification treatment of the epoxy resin by the nano silicon dioxide improves the weather resistance of the epoxy resin, solves the problems of poor compatibility and dispersibility of the nano silicon dioxide in an epoxy system, improves the dosage of the nano silicon dioxide, and further improves the weather resistance and corrosion resistance of a coating. The bisphenol A epoxy resin contains a large number of benzene rings, is easy to be oxidized and degraded under the illumination condition, can effectively absorb partial energy after being modified on the surface of the nano silica dioxide, reduces the aging performance of the epoxy resin, and improves the weather resistance of the coating. Meanwhile, the nano silicon dioxide has the characteristics of high oil absorption and poor dispersibility when being applied in a large amount in the coating due to large specific surface area and large surface residual bond energy, and cannot be used in a large amount. Through the bonding effect of the epoxy silane coupling agent and the nano silicon dioxide and the bonding effect of the epoxy resin and the nano silicon dioxide, the epoxy group is riveted on the surface of the nano silicon dioxide, the dispersibility of the nano silicon dioxide in the epoxy resin is improved, the oil absorption of the nano silicon dioxide is reduced, the formula dosage is effectively improved, the ultraviolet light absorption capacity and the nano size effect of the nano silicon dioxide are improved, and the purposes of improving the weather resistance and the corrosion resistance of a paint film at the same time are achieved.
In one embodiment, the weather resistance of the epoxy coating is improved through the synergistic effect of rutile titanium dioxide, an ultraviolet light absorber, a hindered amine light stabilizer, hydrogenated bisphenol A epoxy resin, a modified polyamide curing agent and nano silicon dioxide.
Wherein the rutile titanium dioxide can effectively absorb ultraviolet rays with the wave band of 350-400 nm; the ultraviolet light absorbent can absorb ultraviolet energy in the 290-400 nm wave band to carry out molecular isomerism recombination, and releases heat generated by ultraviolet absorption in a system, so that thermal oxidation degradation of the system is prevented, and the photoelectric effect of the hindered amine light stabilizer is improved; the hindered amine light stabilizer forms nitroxide free radicals under the photoelectric action, and can effectively capture and remove free radicals formed by degradation and aging of epoxy resin, so that the chain reaction of degradation and aging of the polymer is inhibited; the Si-O bond energy in the nano silicon dioxide is 460kJ/mol, which is higher than the ultraviolet energy (315-415 kJ/mol), and the rutile type titanium white forms a combination to absorb ultraviolet rays, so that the nano silicon dioxide has excellent ultraviolet absorption capacity; the modified polyamide curing agent does not contain unsaturated bonds, is not easy to generate electron transition oxidation reaction, has better weather resistance compared with other types of curing agents, and hydrogenated bisphenol A epoxy resin does not contain benzene rings and has better weather resistance.
In one embodiment, the nano ferrotitanium powder and the physical antirust pigment form are modifiedForming a compact physical shielding film and forming a chemical passivation film by the nano ferrotitanium powder and the base material to improve the corrosion resistance of the epoxy coating. The modified nano ferrotitanium powder has good compatibility and dispersibility with epoxy paint, can effectively exert the nano effect, greatly improves the compactness and the smoothness of a coating film, and effectively blocks H2O、Cl-、O2The physical antirust pigment prolongs H through a flaky structure2O、Cl-、O2And the path and time to reach the substrate surface. In addition, the nano ferrotitanium powder can also react with the base material to form a passive film, so that the corrosion resistance of the coating film is further improved.
In the scheme of the embodiment, white nano ferrotitanium powder with a nano-size effect is selected as a chemical antirust pigment, but the white nano ferrotitanium powder has poor dispersibility and cannot fully exert the nano-size effect.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides the following examples (parts by mass):
TABLE 2
In the above embodiment, specifically:
example 1
In the component A: the epoxy resin B is E44, the active diluent is 660A, the epoxy equivalent weight is 150-200 g/eq, the dispersant is BYK-110, the leveling agent is BYK-354, the ultraviolet light absorber is Tinuvin384-2, the hindered amine light stabilizer is Tinuvin292, the physical anti-rust pigment is wet-process sericite powder, the extender is feldspar powder, and the thixotropic agent is polyamide wax;
the modified epoxy resin A is as follows: 80 parts of epoxy resin A, 3 parts of KH-560, 5 parts of nano silicon dioxide and 12 parts of CCl4Placing the mixture in a three-neck flask, starting magnetic stirring, heating to 100 ℃, preserving heat for 3 hours, then cooling to 70-80 ℃, carrying out reduced pressure distillation, and adding CCl in a container4Distilling, sealing and storing for later use; the epoxy resin A is E51;
the modified nano ferrotitanium powder comprises the following components: 5 parts of nano ferrotitanium powder, 3 parts of KH-560, 8 parts of 1, 6-hexanediol diglycidyl ether and 30 parts of CCl4Placing the mixture in a three-neck flask, starting magnetic stirring, heating to 100 ℃, preserving heat for 3 hours, then cooling to 70-80 ℃, carrying out reduced pressure distillation, and adding CCl in a container4Distilling to obtain;
the solvent is a mixed solvent of n-butanol and xylene in a ratio of 7: 3.
The component B comprises: the amine value of the modified polyamide curing agent is 200-250 mgKOH/g, and the solvent is a mixed solvent of n-butyl alcohol and xylene in a ratio of 1: 2;
the modified polyamide curing agent amine is: 8700-D curing agent.
The selection of specific materials and parameters in the present examples, in addition to those already set forth above, is within the skill of the art to make routine selections and adjustments based on the inventive concepts of the present invention.
Example 2
In the component A: the epoxy resin A is E51, the epoxy resin B is E44, the active diluent is NC-513, the epoxy equivalent is 300-500 g/eq, the dispersant is Youka 710S, the leveling agent is Youka 384S, the ultraviolet light absorber is Tinuvin400, the hindered amine light stabilizer is Tinuvin292, the physical antirust pigment is sericite powder, the extender is a mixed filler of talcum powder and feldspar powder in a mass ratio of 1:1, and the thixotropic agent is polyamide wax;
the modified epoxy resin A is as follows: 80 parts of epoxy resin A, 3 parts of KH-560, 5 parts of nano silicon dioxide and 12 parts of CCl4Placing the mixture in a three-neck flask, starting magnetic stirring, heating to 100 ℃, preserving heat for 3 hours, then cooling to 70-80 ℃, carrying out reduced pressure distillation, and adding CCl in a container4Distilling, sealing and storing for later use; the epoxy resin A is E51;
the solvent is a mixed solvent of n-butanol and xylene in a ratio of 7: 3.
The component B comprises: the amine value of the modified polyamide curing agent is 200-250 mgKOH/g, and the solvent is a mixed solvent of n-butyl alcohol and xylene in a ratio of 1: 2.
The modified polyamide curing agent amine is: 8700-D curing agent.
The selection of specific materials and parameters in the present examples, in addition to those already set forth above, is within the skill of the art to make routine selections and adjustments based on the inventive concepts of the present invention.
Example 3
In the component A: the epoxy resin B is E44, the active diluent is NC-513, the epoxy equivalent is 300-500 g/eq, the dispersant is Youka 710S, the flatting agent is Youka 384S, the ultraviolet light absorber is Tinuvin400, the hindered amine light stabilizer is Tinuvin 219, the physical anti-rust pigment is sericite powder, the extender filler is a mixed filler of talcum powder and feldspar powder in a mass ratio of 1:3, and the thixotropic agent is polyamide wax;
the modified epoxy resin A is as follows: 80 parts of epoxy resin A, 3 parts of KH-560, 5 parts of nano silicon dioxide and 12 parts of CCl4Placing the mixture in a three-neck flask, starting magnetic stirring, heating to 100 ℃, preserving heat for 3 hours, then cooling to 70-80 ℃, carrying out reduced pressure distillation, and adding CCl in a container4Distilling, sealing and storing(ii) a The epoxy resin A is E51;
the modified nano ferrotitanium powder comprises the following components: 5 parts of nano ferrotitanium powder, 3 parts of KH-560, 8 parts of 1, 6-hexanediol diglycidyl ether and 30 parts of CCl4Placing the mixture in a three-neck flask, starting magnetic stirring, heating to 100 ℃, preserving heat for 3 hours, then cooling to 70-80 ℃, carrying out reduced pressure distillation, and adding CCl in a container4Distilling to obtain;
the solvent is a mixed solvent of n-butanol and xylene in a ratio of 7: 3.
The component B comprises: the amine value of the modified polyamide curing agent is 200-250 mgKOH/g, and the solvent is a mixed solvent of n-butyl alcohol and xylene in a ratio of 1: 2;
the modified polyamide curing agent amine is: 8700-D curing agent.
The selection of specific materials and parameters in the present examples, in addition to those already set forth above, is within the skill of the art to make routine selections and adjustments based on the inventive concepts of the present invention.
The A/B component of example 1 was prepared as follows: b is 2.8:1 (mass ratio), the first component and the second component of example 2 are as follows: b is 3.5: 1 (mass ratio) and the A/B component of example 3 were as follows: b is 4.2: 1 (mass ratio) and comparative examples 1 to 8 were each as follows: b 2.8:1 (mass ratio), comparative example 9 a: the performance test was carried out with b being 3.6:1 (mass ratio), and the test results are shown in table 2.
TABLE 3
The examples and comparative examples were subjected to the following tests, the test standards and test results are shown in the following table:
TABLE 4
Wherein the salt spray resistance (dry film thickness 120 μm) is a thickness test index value satisfying the test standard.
In the above examples and comparative examples:
compared with the example 1, the performance of resisting the insolation is obviously reduced because the ultraviolet light absorber and the hindered amine light stabilizer are not added in the comparative example 1;
comparative example 2 compared with example 1, the general modified epoxy resin a was used, the modified epoxy resin a of example 1 was not used, and the ultraviolet light absorber and the hindered amine light stabilizer were not added. It can be seen that the salt spray resistance of comparative example 2 is significantly reduced, and the insolation resistance is further reduced compared with comparative example 1, which shows that the modified epoxy resin A of example 1, the ultraviolet light absorber and the hindered amine light stabilizer cooperate with each other to at least further improve the insolation resistance.
Comparative example 3 on the basis of comparative example 2, hydrogenated bisphenol a epoxy resin is not added to the component b, comparative example 5 on the basis of comparative example 3, modified nano ferrotitanium powder is not used in the component a, and hydrogenated bisphenol a epoxy resin is not added to the component b, i.e. the combination of modified nano ferrotitanium powder and hydrogenated bisphenol a epoxy resin is not used in the scheme compared with comparative example 4, and in combination with comparative example 2, the combination of modified nano ferrotitanium powder and hydrogenated bisphenol a epoxy resin has significantly improved salt fog resistance and sun exposure resistance; also, the addition of hydrogenated bisphenol A epoxy resin proved to have better weatherability than example 2.
Comparative example 4 on the basis of comparative example 1, the salt spray resistance and the exposure resistance are significantly reduced compared with example 1 without using the modified nano ferrotitanium powder, and the salt spray resistance is significantly reduced compared with comparative example 1, so that the positive effect of the modified nano ferrotitanium powder in example 1 on the salt spray resistance can be seen.
Compared with the example 1, the general modified epoxy resin A is not adopted, and the combination of the modified epoxy resin A, the modified nano ferrotitanium powder and the hydrogenated bisphenol A epoxy resin in the example 1 is not adopted. The salt spray resistance and the insolation resistance of the composite material are obviously reduced compared with those of the composite material in the example 1.
Comparative example 7 on the basis of comparative example 6, the use ratio of the physical rust-preventive filler and the extender filler was adjusted, and the salt spray resistance was somewhat lower than that of comparative example 6, which shows that the ratio of the physical rust-preventive filler and the extender filler has a certain influence on the salt spray resistance.
Comparative example 8 on the basis of comparative example 1, the modified nano ferrotitanium powder is not adopted, and the aluminum tripolyphosphate of the same comparative example is added, so that the salt spray resistance is obviously reduced.
Comparative example 9 on the basis of comparative example 1, the exposure resistance is remarkably reduced by adding the cashew nut shell oil modified amine curing agent in the same proportion without adopting the modified polyamide curing agent.
In the embodiment scheme provided by the invention, the weather-proof and corrosion-resistant performance of the nano silicon dioxide, the physical barrier and the chemical corrosion-resistant effect of the nano iron-titanium powder are effectively improved through the modification treatment of the nano filler, and the aim of exerting multiple effects of one substance is fulfilled. In addition, the weather resistance of the traditional epoxy coating is effectively improved by optimizing the using amount of each component from the multiple synergistic effect of a film forming material, an auxiliary agent and a powder system, the corrosion resistance requirement and the weather resistance requirement of a matching system of a wind power tower cylinder are met, and the coating has important practical application value.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.