CN115044278A - Temperature-resistant anticorrosive repairing agent - Google Patents
Temperature-resistant anticorrosive repairing agent Download PDFInfo
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- CN115044278A CN115044278A CN202210902391.0A CN202210902391A CN115044278A CN 115044278 A CN115044278 A CN 115044278A CN 202210902391 A CN202210902391 A CN 202210902391A CN 115044278 A CN115044278 A CN 115044278A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
- C09D183/06—Polysiloxanes containing silicon bound to oxygen-containing groups
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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Abstract
The invention belongs to the technical field of repairing agents, and particularly relates to a temperature-resistant anticorrosive repairing agent which comprises 10-20 parts of polyurethane modified epoxy resin, 10-30 parts of epoxy-terminated polysiloxane, 5-15 parts of a first filler, 5-10 parts of a second filler, 5-10 parts of a curing agent, 1-5 parts of an accelerator, 1-5 parts of a reactive diluent and 0.5-2 parts of a coupling agent; the first filler is formed by mixing spherical porous alumina, a carbon nano tube and zirconia according to a mass ratio of 1-2: 1: 1-2, the second filler is formed by mixing spherical silica, graphene and spherical boron nitride according to a mass ratio of 1:1:2, and the average particle size of the second filler is smaller than that of the first filler. Compared with the prior art, the repairing agent provided by the invention has the advantages of high temperature resistance, corrosion resistance, environmental protection.
Description
Technical Field
The invention belongs to the technical field of repairing agents, and particularly relates to a temperature-resistant anticorrosive repairing agent.
Background
The surface adhesion technology is one of modern surface technologies, and plays an important role in the field of equipment maintenance in recent years, and good social benefits and huge economic benefits are obtained. Compared with surfacing, hot spraying and brush plating, the surface sticking coating technology has the advantages of simple and convenient process, no need of special equipment and no need of heat energy and electric energy consumption, only needs to coat the prepared repairing agent on the cleaned surface to be repaired, is hard like metal after curing, can carry out various mechanical processing, and meets the maintenance requirements of wear resistance, corrosion resistance, size recovery, defect filling, sealing, leakage stoppage and the like of parts. Can be cured at room temperature, has no heat affected zone and thermal deformation to the part, can be operated on site, and reduces the downtime. It saves time and labor, saves energy and a large amount of funds, is a quick and cheap repairing technology, is an effective means for equipment maintenance, and must be developed into one of important modern surface technologies.
The metal repairing agent is a key technology of surface adhesive coating and cementing in equipment maintenance, it is a two-component (or multi-component) daub-like composite material formed from high-molecular polymer, metal powder, ceramic powder and fibre, and can be extensively used for making wear-resisting, corrosion-resisting repairing and pre-protecting coating of parts, repairing various defects of parts (such as crack, scratch, size error, casting air hole and sand hole) and sealing leak-stopping, etc..
However, the repair agents in the current market, such as AB glue, are prepared by mixing two chemical agents and reacting with each other to perform an adhesion function, most of the repair agents are neoprene type glue, contain toxic substances such as toluene and the like, bring harm to human health, and have high manufacturing cost. In addition, most of the glue components are rubber and plastic substances, the glue can be aged after being used for a long time after being bonded, the service life is not long, the glue does not have the characteristics of high temperature resistance and corrosion resistance, the waterproofness is not good, and certain use limitations are realized.
Disclosure of Invention
One of the objects of the present invention is: aiming at the defects of the prior art, the temperature-resistant and corrosion-resistant repairing agent is provided, and has the advantages of environmental protection, high temperature resistance and corrosion resistance.
In order to achieve the purpose, the invention adopts the following technical scheme:
a temperature-resistant anticorrosion repairing agent comprises the following components in parts by mass:
the first filler is formed by mixing spherical porous alumina, a carbon nano tube and zirconia according to a mass ratio of 1-2: 1: 1-2, the second filler is formed by mixing spherical silica, graphene and spherical boron nitride according to a mass ratio of 1:1:2, and the average particle size of the second filler is smaller than that of the first filler.
According to the invention, the-NCO group on the polyurethane prepolymer and the-OH group on the epoxy resin are subjected to a grafting reaction, and after the epoxy resin is modified, the average distance between epoxy functional groups is large, the crosslinking density is small, the toughness of the adhesive is strong, and the peeling strength of the repairing agent is increased.
The epoxy-terminated polysiloxane is a silicone resin modified with an epoxy resin. The organic silicon resin has excellent temperature resistance, chemical corrosion resistance, weather resistance and other performances, is generally formed by condensing multifunctional organic silanol or organic siloxane and has a three-dimensional cross-linked reticular structure, in the reticular structure, a Si-O main chain is coated by an R group connected with Si, so that the Si-O main chain is less prone to be attacked by impurities, and is not easy to break, so that the organic silicon resin has more excellent temperature resistance (namely thermal stability) than other resins, the Si-O main chain can bear temperature erosion better than a C-O main chain of epoxy resin, and the good space network structure enables the organic silicon resin to have better temperature resistance, other performances are effectively improved, such as falling prevention and the like, and the organic silicon resin has high temperature resistance (more than 200 ℃), high temperature resistance and good weather resistance, High humidity resistance, yellowing resistance and the like. The epoxy group enters the end-capped part of the organic silicon resin as a functional group, so that the reactivity and the adhesive force of the organic silicon resin can be improved, the modified organic silicon resin keeps better flexibility at low temperature, and the modified organic silicon resin has the advantages of good adhesive property, small curing shrinkage rate and the like, and the curing temperature of the organic silicon resin is greatly reduced.
The spherical porous alumina has the characteristics of high hardness, chemical corrosion resistance and the like, can reduce the reaction exothermic value and the curing shrinkage rate of the epoxy resin, and improves the heat conduction and the mechanical property of the material. The excellent mechanical properties of the carbon nano tube can improve the strength and toughness of the matrix material, and improve the properties of impact strength, elongation at break and tensile strength, and the synergistic use of the spherical porous alumina, the carbon nano tube and the zirconia can also ensure that the repairing agent has good high heat-conducting property and wave-absorbing property. In addition, although the porous alumina has excellent thermal conductivity, the content of the porous alumina is too high, which is not favorable for the fluidity of the repairing agent. Compared with porous alumina, the carbon nano tube has more obvious improvement on the viscosity of epoxy resin, and the higher the content of the carbon nano tube is, the higher the viscosity is. The average particle size of the second filler is smaller than that of the first filler, so that the second filler can be dispersed between the particle sizes of the spherical porous alumina and the zirconia to form a better heat conduction path.
Preferably, the preparation method of the polyurethane modified epoxy resin comprises the following steps: under the protection of nitrogen, uniformly stirring dehydrated polyol and toluene diisocyanate, heating to 80 ℃ and reacting for 4 hours to obtain a polyurethane prepolymer; and (2) uniformly stirring the polyurethane prepolymer and the epoxy resin, heating to 110 ℃ for reaction for 1h, dropwise adding dibutyl tin dilaurate serving as an accelerator, and stopping reaction after 1h to obtain the polyurethane modified epoxy resin.
Preferably, the preparation method of the epoxy-terminated polysiloxane comprises the following steps: adding bisphenol A epoxy resin into a container, adding toluene as a solvent, heating to raise the temperature, adding zinc octoate as a catalyst when the temperature reaches above 110 ℃, then adding hydroxyl-terminated polymethylphenylsiloxane, keeping the temperature for 2-4 h, continuously evaporating water and toluene in the reaction process, and drying the obtained solid product in an oven to obtain the epoxy-terminated polysiloxane.
Preferably, the glass fiber also comprises 1-5 parts by weight of glass fiber. The addition of a proper amount of glass fiber can effectively improve the wear resistance and the impact resistance of the repairing agent.
Preferably, the adhesive also comprises 1-5 parts by weight of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorinated benzotriazole. The 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorinated benzotriazole can absorb the ultraviolet part of sunlight without changing itself, can inhibit or weaken the degradation of light on the repairing agent, and improves the light resistance and the aging resistance of the repairing agent.
Preferably, the particle size of the spherical porous alumina and the particle size of the zirconia are 0.5-10 μm, and the particle size of the spherical silica and the particle size of the spherical boron nitride are 0.01-0.1 μm. Thus, the second filler particles can be dispersed between the particle sizes of the spherical porous alumina and zirconia to form a better heat conduction path.
Preferably, the coupling agent is gamma-glycidyl ether propyl trimethoxy silane and gamma-methacryloxypropyl trimethoxy silane which are mixed according to the mass ratio of 1: 1.
Preferably, the curing agent is hexahydro-4-methylphthalic anhydride and polythiol, wherein the mass ratio of the curing agent to the curing agent is 1:2 and mixing.
Preferably, the accelerator is an organic urea accelerator and a polythiol accelerator in a mass ratio of 1:1, and the polythiol accelerator is 3-mercaptopropionate. The polythiol accelerator 3-mercaptopropionate can obviously shorten the curing time of the epoxy resin adhesive and reduce the curing temperature. It should be noted that the amount of the polythiol curing accelerator must be appropriate because when the amount is too large, not only the curing time is prolonged, but also the epoxy adhesive performance is deteriorated. Wherein, the organic urea accelerator adopted in the invention is Dyhard UR 500. When the polythiol accelerator 3-mercaptopropionate is added into the system independently, the adhesive prepared by the polythiol accelerator has low structural strength and long curing time, and the organic urea accelerator is added into the system simultaneously, so that the mercapto group in the polythiol accelerator 3-mercaptopropionate can be better promoted to be converted into mercapto ions, and the mercapto ions can be fully reacted with the epoxy group in the epoxy resin.
Preferably, the reactive diluent is a mixture of phenyl glycidyl ether, glycidyl methacrylate and ethylene glycol diglycidyl ether according to a mass ratio of 1:1: 1-2.
Compared with the prior art, the invention at least has the following beneficial effects:
1) the modified silicone resin has good flexibility at low temperature, has the advantages of good bonding performance, small curing shrinkage rate and the like, and greatly reduces the curing temperature of the silicone resin.
2) According to the invention, the polyurethane modified epoxy resin is added, and after the epoxy resin is modified, the average distance between epoxy functional groups is large, the crosslinking density is small, and the toughness and the peeling strength of the repairing agent are enhanced. In addition, the first filler and the second filler added in the repairing agent belong to fillers with high thermal conductivity, high temperature resistance, low fineness and small specific gravity, so that a synergistic effect is generated, and the high temperature resistance, high thermal conductivity, high permeability and corrosion resistance of the repairing agent can be improved.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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.
Example 1
The embodiment provides a temperature-resistant anticorrosion repairing agent, which comprises 10 parts of polyurethane modified epoxy resin, 10 parts of epoxy-terminated polysiloxane, 5 parts of a first filler, 5 parts of a second filler, 5 parts of a curing agent, 1 part of an accelerator, 1 part of a reactive diluent and 0.5 part of a coupling agent;
the first filler is formed by mixing spherical porous alumina, a carbon nano tube and zirconia according to a mass ratio of 2:1:1, and the second filler is formed by mixing spherical silica, graphene and spherical boron nitride according to a mass ratio of 1:1: 2;
the average particle size of the second filler is smaller than that of the first filler, wherein the particle sizes of the spherical porous alumina and the zirconia are 0.5-10 mu m, and the particle sizes of the spherical silica and the spherical boron nitride are 0.01-0.1 mu m.
The coupling agent is formed by mixing gamma-glycidyl ether propyl trimethoxy silane and gamma-methacryloxypropyl trimethoxy silane according to the mass ratio of 1: 1.
The curing agent is hexahydro-4-methylphthalic anhydride and polythiol, and the mass ratio of the curing agent to the curing agent is 1:2 and mixing.
The accelerator is an organic urea accelerator and a polythiol accelerator in a mass ratio of 1:1, the polythiol accelerator is 3-mercaptopropionate, and the organic urea accelerator is Dyhard UR 500.
The reactive diluent is prepared by mixing phenyl glycidyl ether, methacrylic acid glycidyl ether and ethylene glycol diglycidyl ether according to the mass ratio of 1:1: 1.
The preparation method of the temperature-resistant anticorrosive repairing agent comprises the following steps:
s1, preparing polyurethane modified epoxy resin: under the protection of nitrogen, uniformly stirring dehydrated polyol and toluene diisocyanate, heating to 80 ℃ and reacting for 4 hours to obtain a polyurethane prepolymer; uniformly stirring the polyurethane prepolymer and the epoxy resin, heating to 110 ℃ for reaction for 1h, dropwise adding dibutyltin dilaurate serving as an accelerator, and stopping after the reaction for 1h to obtain polyurethane modified epoxy resin;
s2, preparation of epoxy-terminated polysiloxane: adding bisphenol A epoxy resin into a container, adding toluene as a solvent, heating to raise the temperature, adding zinc octoate as a catalyst when the temperature reaches above 110 ℃, then adding hydroxyl-terminated polymethylphenylsiloxane, preserving the temperature for 2-4 h, continuously evaporating water and toluene in the reaction process, and drying the obtained solid product in an oven to obtain epoxy-terminated polysiloxane;
s3, adding polyurethane modified epoxy resin, epoxy-terminated polysiloxane, a first filler, a second filler, a curing agent, an accelerator, an active diluent and a coupling agent into a planetary power mixer, controlling the temperature of the materials at 60-80 ℃, vacuumizing, dispersing uniformly at a high speed, and cooling the materials to 25-30 ℃ to obtain the repairing agent.
Example 2
Different from the embodiment 1, the embodiment provides a temperature-resistant anticorrosion repairing agent, which comprises 20 parts of polyurethane modified epoxy resin, 30 parts of epoxy-terminated polysiloxane, 15 parts of first filler, 10 parts of second filler, 10 parts of curing agent, 5 parts of accelerator, 5 parts of reactive diluent and 2 parts of coupling agent;
the first filler is formed by mixing spherical porous alumina, a carbon nano tube and zirconia according to a mass ratio of 1:1:2, and the second filler is formed by mixing spherical silica, graphene and spherical boron nitride according to a mass ratio of 1:1: 2.
The rest is the same as embodiment 1, and the description is omitted here.
Example 3
Different from the embodiment 1, the embodiment provides a temperature-resistant anticorrosion repairing agent, which comprises 15 parts of polyurethane modified epoxy resin, 20 parts of epoxy-terminated polysiloxane, 10 parts of first filler, 8 parts of second filler, 8 parts of curing agent, 3 parts of accelerator, 3 parts of reactive diluent and 1 part of coupling agent;
the first filler is formed by mixing spherical porous alumina, a carbon nano tube and zirconia according to a mass ratio of 2:1:2, and the second filler is formed by mixing spherical silica, graphene and spherical boron nitride according to a mass ratio of 1:1: 2.
The rest is the same as embodiment 1, and the description is omitted here.
Example 4
Different from the embodiment 1, the embodiment provides a temperature-resistant anticorrosive repairing agent, which further comprises 3 parts by weight of glass fiber.
The rest is the same as embodiment 1, and the description is omitted here.
Example 5
Different from the embodiment 1, the embodiment provides a temperature-resistant anticorrosive repairing agent, which further comprises 3 parts by weight of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorobenzotriazole.
The rest is the same as embodiment 1, and the description is omitted here.
The performance of the repair agents prepared in examples 1 to 5 was tested.
The test method is as follows:
1. and (3) testing temperature resistance:
1) sample preparation: the repairing agent is uniformly coated on the surface of the steel matrix, and the thickness of the coating layer is 2 mm.
2) And (3) placing the adhered sample into an oven, gradually heating to the temperature required by the test, preserving the heat for a certain time, and observing the change condition of the adhesive layer. The results of the tests are shown in the following table.
2. And (3) corrosion resistance testing:
1) sample preparation: the repairing agent is uniformly coated on the surface of the steel matrix, and the thickness of the coating layer is 2 mm.
2) Corrosive liquid: preparing 70% sulfuric acid solution and 70% sodium hydroxide solution.
3) The test was performed at room temperature, with periodic observations, and the observations were recorded after four weeks.
The results of the tests are shown in the following table.
The test results in the table show that the repairing agent provided by the invention has excellent temperature resistance and corrosion resistance.
The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The temperature-resistant anticorrosive repairing agent is characterized by comprising the following components in parts by mass:
the first filler is formed by mixing spherical porous alumina, a carbon nano tube and zirconia according to a mass ratio of 1-2: 1: 1-2, the second filler is formed by mixing spherical silica, graphene and spherical boron nitride according to a mass ratio of 1:1:2, and the average particle size of the second filler is smaller than that of the first filler.
2. The temperature-resistant anticorrosive repairing agent according to claim 1, wherein the preparation method of the polyurethane modified epoxy resin comprises the following steps: under the protection of nitrogen, uniformly stirring dehydrated polyol and toluene diisocyanate, heating to 80 ℃ and reacting for 4 hours to obtain a polyurethane prepolymer; and (2) uniformly stirring the polyurethane prepolymer and the epoxy resin, heating to 110 ℃ for reaction for 1h, dropwise adding dibutyl tin dilaurate serving as an accelerator, and stopping reaction after 1h to obtain the polyurethane modified epoxy resin.
3. The temperature-resistant anti-corrosion repairing agent according to claim 1, wherein the preparation method of the epoxy-terminated polysiloxane comprises the following steps: adding bisphenol A epoxy resin into a container, adding toluene as a solvent, heating to raise the temperature, adding zinc octoate as a catalyst when the temperature reaches above 110 ℃, then adding hydroxyl-terminated polymethylphenylsiloxane, keeping the temperature for 2-4 h, continuously evaporating water and toluene in the reaction process, and drying the obtained solid product in an oven to obtain the epoxy-terminated polysiloxane.
4. The temperature-resistant anticorrosive repairing agent according to claim 1, further comprising 1-5 parts by weight of glass fiber.
5. The temperature-resistant anticorrosive repairing agent according to claim 1, further comprising 1-5 parts by weight of 2- (2 ' -hydroxy-3 ', 5 ' -di-tert-phenyl) -5-chlorobenzotriazole.
6. The temperature-resistant anticorrosion repairing agent according to claim 1, wherein the particle size of the spherical porous alumina and the particle size of the zirconia are 0.5-10 μm, and the particle size of the spherical silica and the particle size of the spherical boron nitride are 0.01-0.1 μm.
7. The temperature-resistant anticorrosive repairing agent according to claim 1, wherein the coupling agent is a mixture of gamma-glycidoxypropyltrimethoxysilane and gamma-methacryloxypropyltrimethoxysilane in a mass ratio of 1: 1.
8. The temperature-resistant anticorrosive repairing agent according to claim 1, wherein the curing agent is hexahydro-4-methylphthalic anhydride and polythiol according to the mass ratio of 1:2 and mixing.
9. The temperature-resistant anticorrosive repairing agent according to claim 1, wherein the accelerator is an organic urea accelerator and a polythiol accelerator in a mass ratio of 1:1, and the polythiol accelerator is 3-mercaptopropionate.
10. The temperature-resistant anticorrosive repairing agent according to claim 1, wherein the reactive diluent is a mixture of phenyl glycidyl ether, glycidyl methacrylate and ethylene glycol diglycidyl ether in a mass ratio of 1:1: 1-2.
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| CN202210902391.0A CN115044278A (en) | 2022-07-29 | 2022-07-29 | Temperature-resistant anticorrosive repairing agent |
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| CN202210902391.0A CN115044278A (en) | 2022-07-29 | 2022-07-29 | Temperature-resistant anticorrosive repairing agent |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115960519A (en) * | 2023-02-22 | 2023-04-14 | 湖州龙珠高分子新材料有限公司 | Preparation method of coupling agent modified water-based UV (ultraviolet) wood finish |
| CN116535139A (en) * | 2023-03-18 | 2023-08-04 | 嘉兴市韶华塑胶新材料股份有限公司 | Heat-conducting high-temperature-resistant balanced cement and preparation method thereof |
-
2022
- 2022-07-29 CN CN202210902391.0A patent/CN115044278A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115960519A (en) * | 2023-02-22 | 2023-04-14 | 湖州龙珠高分子新材料有限公司 | Preparation method of coupling agent modified water-based UV (ultraviolet) wood finish |
| CN116535139A (en) * | 2023-03-18 | 2023-08-04 | 嘉兴市韶华塑胶新材料股份有限公司 | Heat-conducting high-temperature-resistant balanced cement and preparation method thereof |
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