CN110791198A - Coating material and preparation method thereof - Google Patents
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- CN110791198A CN110791198A CN201911035249.5A CN201911035249A CN110791198A CN 110791198 A CN110791198 A CN 110791198A CN 201911035249 A CN201911035249 A CN 201911035249A CN 110791198 A CN110791198 A CN 110791198A
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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
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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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1656—Antifouling paints; Underwater paints characterised by the film-forming substance
- C09D5/1662—Synthetic film-forming substance
- C09D5/1675—Polyorganosiloxane-containing compositions
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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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1681—Antifouling coatings characterised by surface structure, e.g. for roughness effect giving superhydrophobic coatings or Lotus effect
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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
- C09D5/16—Antifouling paints; Underwater paints
- C09D5/1687—Use of special additives
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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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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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
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention discloses a coating material and a preparation method thereof, wherein the coating material comprises silica gel, fluorosilicone resin, a filler, a cross-linking agent, a coupling agent and a catalyst. When the coating material is prepared into the anticorrosive coating of reinforced concrete, the damage of the anticorrosive coating by the secretion of microorganisms adsorbed on marine organisms is avoided. The technical scheme of the invention can reduce the adhesion of marine organisms to the anticorrosive coating and prevent seawater from corroding reinforced concrete through the anticorrosive coating.
Description
Technical Field
The invention relates to the technical field of marine building material corrosion prevention, in particular to a coating material and a preparation method thereof.
Background
The reinforced concrete structure in the marine environment is subjected to the independent action or the composite action of corrosive ions, organisms, freezing, carbonization, alternation of wetting and drying and the like for a long time, so that the damage of the concrete body structure is caused, and the corrosion of the steel bars in the concrete is induced, thereby causing the cracking and the peeling of a reinforced concrete protective layer, the reduction of the section area of the steel bars, the reduction of the bonding force and the reduction of the bearing capacity, and finally causing the damage of the reinforced concrete structure. Among them, the reinforced concrete in the spray splash zone is most severely corroded due to the alternation of dry and wet sea water, the sufficient supply of high-concentration corrosive ions and water and oxygen. Therefore, it is necessary to develop a product for effectively repairing and protecting reinforced concrete under severe marine environments.
Currently, epoxy resin systems and acrylic resin systems are commonly used as anticorrosive coatings for reinforced concrete. However, the anticorrosive coatings prepared by the epoxy resin system and the acrylic resin system are easy to adhere to marine organisms, and microorganisms adsorbed on the marine organisms generate secretion in the process of metabolism, so that the secretion can damage the anticorrosive coatings, thereby enabling seawater to penetrate the anticorrosive coatings to corrode reinforced concrete.
Disclosure of Invention
The invention mainly aims to provide a coating material, aiming at reducing the adhesion of marine organisms to an anticorrosive coating and preventing seawater from penetrating the anticorrosive coating to corrode reinforced concrete.
In order to achieve the purpose, the coating material provided by the invention comprises silica gel, fluorosilicone resin, a filler, a cross-linking agent, a coupling agent and a catalyst.
Optionally, the filler comprises alumina and titania.
Alternatively, the alumina is crystalline form α alumina;
and/or the titanium dioxide is selected from one or two of anatase type titanium dioxide and rutile type titanium dioxide.
Optionally, the raw silicone rubber comprises 107 silicone rubbers of at least two different viscosities.
Optionally, the cross-linking agent is selected from one or more of an alkoxysilane, a ketoximosilane, and an acyloxysilane.
Optionally, the coupling agent is selected from one or more of a silane coupling agent KH-470, a silane coupling agent KH530, a silane coupling agent KH550, a silane coupling agent KH560, a silane coupling agent KH570 and a silane coupling agent KH 792.
Optionally, the catalyst is selected from one or more of an organotin catalyst, an organotitanium catalyst, and an organoaluminum catalyst.
Optionally, the coating material further comprises fumed silica.
Optionally, the coating material comprises, by mass, 20-60 parts of raw silicone rubber, 5-20 parts of fluorosilicone resin, 31-55 parts of a filler, 1-10 parts of a crosslinking agent, 1-5 parts of a coupling agent, and 0.1-5 parts of a catalyst.
The invention also provides a preparation method of the coating material, which comprises the following steps:
mixing the crude silica gel and the filler, and kneading at 130-150 ℃ and-0.09-0.095 MPa to obtain a base material;
and adding fluorosilicone resin into the base material under a vacuum condition, stirring, adding a cross-linking agent, a coupling agent and a catalyst in sequence after uniform dispersion, and reacting to obtain the coating material.
The invention provides a coating material which comprises silica gel, fluorosilicone resin, a filler, a cross-linking agent, a coupling agent and a catalyst. The fluorosilicone resin is a low surface energy material, has a large contact angle with water drops, and has a lotus leaf effect. When the coating material is prepared into the anticorrosive coating of the reinforced concrete, marine organisms cannot be attached to the surface of the anticorrosive coating through seawater due to the lotus effect generated by the fluorosilicone resin, so that the phenomenon that the anticorrosive coating is damaged by secretion of microorganisms adsorbed on the marine organisms is avoided, and the reinforced concrete cannot be corroded by the seawater through the anticorrosive coating. The technical scheme of the invention can reduce the adhesion of marine organisms to the anticorrosive coating and prevent seawater from corroding reinforced concrete through the anticorrosive coating.
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. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
The invention provides a coating material.
In an embodiment of the present invention, a coating material includes a silicone rubber, a fluorosilicone resin, a filler, a cross-linking agent, a coupling agent, and a catalyst.
The invention provides a coating material which comprises silica gel, fluorosilicone resin, a filler, a cross-linking agent, a coupling agent and a catalyst. The fluorosilicone resin is a low surface energy material, has a large contact angle with water drops, and has a lotus leaf effect. When the coating material is prepared into the anticorrosive coating of the reinforced concrete, marine organisms cannot be attached to the surface of the anticorrosive coating through seawater due to the lotus effect generated by the fluorosilicone resin, so that the phenomenon that the anticorrosive coating is damaged by secretion of microorganisms adsorbed on the marine organisms is avoided, and the reinforced concrete cannot be corroded by the seawater through the anticorrosive coating. The technical scheme of the invention can reduce the adhesion of marine organisms to the anticorrosive coating and prevent seawater from corroding reinforced concrete through the anticorrosive coating.
It should be noted that α, omega-dihydroxy polysiloxane is a base rubber of two-component and single-component condensed type silicone gum, generally referred to as 107 silicone rubber in the market, in the embodiment of the invention, the silicone gum is 107 silicone rubber, the 107 silicone rubber can be directly used as a commodity, and can also be used as an intermediate for producing a silicone gum product, the fluorosilicone resin is a synthetic resin formed by mixing fluororesin and organic silicon resin, the fluorosilicone resin contains fluorocarbon groups, and the fluorocarbon groups are used as hydrophobic groups, so that the surface energy of the fluorosilicone resin is reduced.
In one embodiment of the invention, the filler comprises alumina and titanium dioxide. According to the invention, the aluminum oxide is introduced into the coating material and is used as a filler, so that the reinforcing effect is achieved, the price is low, and the preparation cost of the coating material is reduced; on the other hand, the embodiment of the invention also introduces titanium dioxide which is used as a filler, thereby improving the whiteness of the coating material. Of course, the amount of alumina and titania used can be adjusted according to the requirement in the embodiment of the present invention, and the present invention is not limited thereto, and the above is within the protection scope of the present invention.
In order to further enhance the anticorrosion effect of the coating material, α crystal form aluminum oxide which is inert to acid and alkali can be adopted in the embodiment of the invention, so that the anticorrosion coating prepared from the coating material is not easy to corrode by acid and alkali, and the protection effect on reinforced concrete is ensured.
In an embodiment of the present invention, the titanium dioxide is selected from one or both of anatase type titanium dioxide and rutile type titanium dioxide. The anatase type titanium dioxide and the rutile type titanium dioxide have high whiteness and acid and alkali resistance, and when the titanium dioxide is used as a filler, on one hand, the whiteness of a coating material is improved, and on the other hand, the acid and alkali resistance of an anticorrosive coating prepared from the coating material is ensured.
In one embodiment of the present invention, the raw silicone rubber comprises 107 silicone rubbers with at least two different viscosities. The viscosity of the 107 silicon rubber is 20000 mPas-80000 mPas. Specifically, the crude silicone rubber includes 107 silicone rubber of 80000mPa · s, 107 silicone rubber of 500000mPa · s, and 107 silicone rubber of 20000mPa · s. According to the invention, 107 silicon rubbers with different viscosities are selected to adjust the crosslinking degree of rubber molecular chains, so that the prepared anticorrosive coating has high elasticity and excellent mechanical properties.
In one embodiment of the present invention, the cross-linking agent is selected from one or more of alkoxy silane, ketoximo silane, and acyloxy silane. The invention can adopt different cross-linking agents to cross-link 107 silicon rubber, thereby increasing the cross-linking degree of rubber molecular chains and improving the mechanical property of the prepared anticorrosive coating.
In one embodiment of the invention, the coupling agent is selected from one or more of silane coupling agent KH-470, silane coupling agent KH530, silane coupling agent KH550, silane coupling agent KH560, silane coupling agent KH570 and silane coupling agent KH 792. The invention can adopt different cross-linking agents to enable linear rubber molecular chains to be cross-linked with each other to form a grid structure, thereby increasing the strength of the coating material and improving the elasticity and the mechanical property of the prepared anticorrosive coating.
In an embodiment of the present invention, the coupling agent is a silane coupling agent. The invention improves the dispersibility and adhesive force of the filler in a rubber system by introducing the silane coupling agent, thereby improving the compatibility between the filler and the rubber and further improving the comprehensive performance of the prepared coating material. Of course, the silane coupling agent may be selected from one or more of the silane coupling agent KH-470, the silane coupling agent KH530, the silane coupling agent KH550, the silane coupling agent KH560, the silane coupling agent KH570 and the silane coupling agent KH792, and the present invention is not limited thereto and the above is within the protection scope of the present invention.
In one embodiment of the present invention, the catalyst is selected from one or more of an organotin catalyst, an organotitanium catalyst, and an organoaluminum catalyst. The invention introduces a catalyst to initiate the polymerization reaction between rubber molecules. Preferably, the catalyst is selected from one or more of an organotin catalyst, an organotitanium catalyst, and an organoaluminum catalyst, although other catalysts may be used in the embodiment of the present invention as long as they can initiate polymerization between rubber molecules. The present invention is not limited thereto and catalysts of the above different types are within the scope of the present invention.
In an embodiment of the invention, the coating material further comprises fumed silica. In order to improve the comprehensive performance of the anticorrosive coating, the embodiment of the invention introduces the fumed silica, and the addition of the fumed silica can effectively improve the strength, the wear resistance and the aging resistance of the prepared anticorrosive coating. Of course, the embodiment of the present invention properly adjusts the amount of fumed silica, and the present invention is not limited thereto, and the above is within the scope of the present invention.
In an embodiment of the invention, the coating material comprises 5-10 parts of 500000 mPas 107 silicon rubber, 10-30 parts of 80000 mPas 107 silicon rubber, 5-20 parts of 20000 mPas 107 silicon rubber, 5-20 parts of fluorosilicone resin, 30-50 parts of alumina, 1-5 parts of titanium dioxide, 1-10 parts of fumed silica, 1-10 parts of a cross-linking agent, 1-5 parts of a coupling agent and 0.1-5 parts of a catalyst. The coating material obtained in the embodiment of the invention is based on the silica gel and added with the fluorosilicone resin, so that the prepared anticorrosive coating has excellent acid and alkali resistance and salt spray resistance, reduces the attachment of marine organisms, has excellent mechanical properties, and can be used for protecting reinforced concrete.
The invention further provides a preparation method of the coating material, the preparation method of the coating material comprises the coating material, the coating material refers to the above embodiment, and as the coating material adopts all technical schemes of the above embodiment, at least all beneficial effects brought by the technical schemes of the above embodiment are achieved, and no further description is given here. The embodiment of the invention provides a preparation method of a coating material, which comprises the following steps: mixing 107 silicon rubber, alumina, titanium dioxide and fumed silica, and kneading at 130-150 ℃ and-0.09 MPa-0.095 MPa to obtain a base material; and adding fluorosilicone resin into the base material under a vacuum condition, stirring, adding a cross-linking agent, a coupling agent and a catalyst in sequence after uniform dispersion, and reacting to obtain the coating material. Of course, the 107 silicone rubber, the alumina, the titanium dioxide and the fumed silica can be added into a kneader and kneaded, the temperature of the kneader is adjusted to be 130-150 ℃, the vacuum degree is adjusted to be-0.09 MPa-0.095 MPa, and after 3 hours of kneading, the base material is obtained. Adding the base material into a high-speed dispersion machine, vacuumizing and degassing for 10 minutes to remove air mixed in the base material, adding fluorosilicone resin, and keeping vacuum stirring for 20 minutes, wherein the vacuum degree is kept to be less than-0.08 MPa in the process; then, adding a cross-linking agent, keeping vacuum stirring for 20 minutes, and keeping the vacuum degree to be less than-0.08 MPa in the process; then adding a coupling agent and a catalyst, and vacuumizing and dispersing at a high speed for 30 minutes to obtain the coating material. Most of the raw materials adopted by the embodiment of the invention are inert materials, the process is simple, the method is suitable for large-scale industrial application, and the practicability is strong.
In one embodiment of the present invention, the preparation process of the coating material is performed under an environmental condition with a relative humidity of less than 70%. The invention controls the humidity of the preparation process to ensure that the prepared coating material is in a fluid state, and after the coating material is coated on the reinforced concrete substrate, the coating material absorbs moisture so as to be cured to form the anticorrosive coating.
The technical solution of the present invention is further described below with reference to specific examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the scope of the invention.
Example 1
A coating material comprises 5kg of 107 silicone rubber of 500000 mPas, 25kg of 107 silicone rubber of 80000 mPas, 20kg of 107 silicone rubber of 20000 mPas, 30kg of alumina, 1kg of titanium dioxide, 5kg of fluorosilicone resin, 5kg of fumed silica, 2kg of methyltributanone oxime silane, 3kg of vinyltributone oxime silane, 1kg of aminopropyltriethoxysilane (KH-550) and 0.1kg of dibutyltin dilaurate.
Based on the composition of the coating material, the preparation method of the coating material comprises the following steps:
firstly, 107 silicon rubber, alumina, titanium dioxide and fumed silica are added into a kneader and kneaded for 3 hours at the temperature of 130-150 ℃ and the pressure of-0.09-0.095 MPa to prepare a base material, and the base material is cooled to normal temperature and sealed for storage.
And secondly, adding the base material into a high-speed dispersion machine, vacuumizing and degassing for 10 minutes, adding fluorosilicone resin, and keeping vacuum stirring for 20 minutes, wherein the vacuum degree is required to be less than-0.08 MPa. If the vacuum degree is more than minus 0.08MPa, timely vacuumizing is carried out to maintain the vacuum degree to be less than minus 0.08 MPa.
And step three, adding methyl tributyrinoxime silane and vinyl tributyrinoxime silane, and keeping vacuum stirring for 20 minutes, wherein the vacuum degree is less than-0.08 MPa. If the vacuum degree is more than minus 0.08MPa, timely vacuumizing is carried out to maintain the vacuum degree to be less than minus 0.08 MPa.
Fourthly, adding aminopropyltriethoxysilane (KH-550) and dibutyl tin dilaurate, vacuumizing and dispersing for 30 minutes at high speed to obtain a coating material product.
Example 2
A coating material comprises 5kg of 107 silicone rubber of 500000 mPas, 20kg of 107 silicone rubber of 80000 mPas, 25kg of 107 silicone rubber of 20000 mPas, 25kg of alumina, 2kg of titanium dioxide, 8kg of fluorosilicone resin, 8kg of fumed silica, 2kg of methyl tributyrinoxime silane, 3kg of phenyltrimethoxysilane, 1kg of gamma-glycidoxy triethoxysilane (KH-550) and 0.05kg of dibutyltin bis (acetylacetonate).
Based on the composition of the coating material, the preparation method of the coating material comprises the following steps:
firstly, 107 silicon rubber, alumina, titanium dioxide and fumed silica are added into a kneader and kneaded for 3 hours at the temperature of 130-150 ℃ and the pressure of-0.09-0.095 MPa to prepare a base material, and the base material is cooled to normal temperature and sealed for storage.
And secondly, adding the base material into a high-speed dispersion machine, vacuumizing and degassing for 10 minutes, adding fluorosilicone resin, and keeping vacuum stirring for 20 minutes, wherein the vacuum degree is required to be less than-0.08 MPa. If the vacuum degree is more than minus 0.08MPa, timely vacuumizing is carried out to maintain the vacuum degree to be less than minus 0.08 MPa.
And thirdly, adding methyl tributyrinoxime silane and phenyl trimethoxy silane, and keeping vacuum stirring for 20 minutes, wherein the vacuum degree is less than-0.08 MPa. If the vacuum degree is more than minus 0.08MPa, timely vacuumizing is carried out to maintain the vacuum degree to be less than minus 0.08 MPa.
And fourthly, adding gamma-epoxy propoxy triethoxy silane and dibutyltin bis (acetyl acetonate), vacuumizing and dispersing for 30 minutes at a high speed to obtain a coating material product.
Comparative example 1
The components and their contents and preparation method are exactly the same as those of example 1, except that no fluorosilicone resin is added on the basis of example 1.
The coating material products prepared in examples 1 and 2 and comparative example 1 are respectively tested for mechanical properties before treatment, acidic solution, alkaline solution and salt solubility treatment with reference to GB/T528-2009, and the test results are shown in table 1.
TABLE 1
As can be seen from Table 1, the anticorrosive coatings prepared by the coating materials of the embodiments 1-2 of the invention have good tensile strength. Compared with a comparative example, the tensile strength of the anticorrosive coating prepared by the embodiment of the invention is not changed greatly after the acid solution, the alkaline solution and the salt solubility treatment, so that the anticorrosive coating prepared by the coating material of the invention has good acid and alkali resistance.
The examples 1, 2, 1, the existing epoxy anticorrosive material and the existing acrylic anticorrosive material were coated on a 500 × 500 × 50 high performance concrete slab, the coating thickness was controlled at 2mm, the panel was immersed in seawater after 7 days of coating curing, and the results of marine organism adhesion resistance of the coating panels are shown in table 2.
TABLE 2
As can be seen from Table 2, the anticorrosive coating prepared by the coating material of the embodiment of the invention effectively avoids the attachment of marine organisms. And, it can be seen from comparative example 1 that the introduction of the fluorosilicone resin can reduce the adhesion of marine organisms to the anticorrosive coating.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the present specification and directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. The coating material is characterized by comprising silica gel, fluorosilicone resin, filler, a cross-linking agent, a coupling agent and a catalyst.
2. The coating material of claim 1, wherein the filler comprises alumina and titania.
3. The coating material of claim 2, wherein the alumina is crystalline form α alumina;
and/or the titanium dioxide is selected from one or two of anatase type titanium dioxide and rutile type titanium dioxide.
4. The coating material of any one of claims 1 to 3, wherein the raw silicone rubber comprises 107 silicone rubbers of at least two different viscosities.
5. The coating material of any one of claims 1 to 3, wherein the crosslinker is selected from one or more of alkoxysilanes, ketoximosilanes, and acyloxysilanes.
6. The coating material of any of claims 1 to 3, wherein the coupling agent is selected from one or more of silane coupling agent KH-470, silane coupling agent KH530, silane coupling agent KH550, silane coupling agent KH560, silane coupling agent KH570, and silane coupling agent KH 792.
7. The coating material of any one of claims 1 to 3, wherein the catalyst is selected from one or more of an organotin catalyst, an organotitanium catalyst, and an organoaluminum catalyst.
8. The coating material of any one of claims 1 to 3, wherein the coating material further comprises fumed silica.
9. The coating material according to any one of claims 1 to 3, wherein the coating material comprises, by mass, 20 to 60 parts of raw silicone rubber, 5 to 20 parts of fluorosilicone resin, 31 to 55 parts of a filler, 1 to 10 parts of a crosslinking agent, 1 to 5 parts of a coupling agent, and 0.1 to 5 parts of a catalyst.
10. A method for preparing a coating material according to any one of claims 1 to 9, comprising the steps of:
mixing the crude silica gel and the filler, and kneading at 130-150 ℃ and-0.09-0.095 MPa to obtain a base material;
and adding fluorosilicone resin into the base material under a vacuum condition, stirring, adding a cross-linking agent, a coupling agent and a catalyst in sequence after uniform dispersion, and reacting to obtain the coating material.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115352154A (en) * | 2022-08-25 | 2022-11-18 | 启东海大聚龙新材料科技有限公司 | Preparation method of anti-static marine cable sheath material and product thereof |
| CN116004117A (en) * | 2023-01-03 | 2023-04-25 | 湖北航天化学技术研究所 | Dark green silicon rubber antistatic coating and preparation method and application thereof |
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| CN115352154A (en) * | 2022-08-25 | 2022-11-18 | 启东海大聚龙新材料科技有限公司 | Preparation method of anti-static marine cable sheath material and product thereof |
| CN115352154B (en) * | 2022-08-25 | 2024-06-07 | 启东海大聚龙新材料科技有限公司 | Preparation method of antistatic marine cable sheath material and product thereof |
| CN116004117A (en) * | 2023-01-03 | 2023-04-25 | 湖北航天化学技术研究所 | Dark green silicon rubber antistatic coating and preparation method and application thereof |
| CN116004117B (en) * | 2023-01-03 | 2024-03-01 | 湖北航天化学技术研究所 | Dark green silicon rubber antistatic coating and preparation method and application thereof |
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