CN112646490A - Salt-fog-resistant flexible anti-drag coating and preparation method and application thereof - Google Patents
Salt-fog-resistant flexible anti-drag coating and preparation method and application thereof Download PDFInfo
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- 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
- C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
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Abstract
The invention discloses a salt-fog-resistant flexible anti-drag coating and a preparation method and application thereof. The preparation method comprises the following steps: uniformly mixing the fluorine-containing silicon rubber, a catalyst and a cross-linking agent to form a mixed solution; and applying the mixed liquid to the surface of a substrate, and then curing to obtain the salt spray-resistant flexible drag-reduction coating. The invention takes the fluorine-containing silicon rubber as a main body, the salt-fog-resistant flexible resistance-reducing coating prepared by utilizing the fluorine-containing silicon rubber, the catalyst and the cross-linking agent in different proportions has excellent salt-fog resistance and flexibility, the preparation process is simple, the step of mixing the solution can be automatic and manual, the reaction temperature is room temperature, the stable coating can be formed only by simply spraying and curing at room temperature, the method can be suitable for ocean navigation bodies and underwater navigation bodies, the coating is sprayed and constructed by utilizing a spray gun, and can be dried and cured at room temperature, and the excellent performance of the coating has great research significance and application prospect.
Description
Technical Field
The invention relates to a coating, in particular to a salt-fog-resistant flexible anti-drag coating, a preparation method and application thereof, and belongs to the technical field of ocean skills.
Background
In recent years, the country extremely attaches importance to and vigorously develops the marine industry, and the energy consumption rate of marine navigation bodies is one of the important evaluation standards for the performance indexes of ships in the new century. The energy consumption of ships, besides maintaining the operation of the equipment and satisfying the daily consumption of the crew, the most important energy is wasted in overcoming the resistance during sailing.
The ship resistance is mainly divided into three types, wherein the frictional resistance accounts for 70-80% when the ship sails at low speed, and 45-50% when the ship sails at high speed, and the friction resistance is relatively large, and can be adjusted by methods such as changing the fluid state through surface design, so that how to reduce the frictional resistance becomes the main research direction of the resistance reduction technology.
The resistance reduction technology adopted at present is divided into an active mode and a passive mode, the active method is mainly used for heating a ship body by utilizing self residual heat of the ship, the passive resistance reduction technology is mainly used for resistance reduction technologies such as super-hydrophobic and micro-nano grooves, the flexible coating resistance reduction technology is taken as a key research project in the resistance reduction field in recent years, the principle is that a thin elastic coating or an impermeable film is coated on the surface of a navigation body, pressure pulsation can be inhibited and absorbed due to the flexible effect, transition from laminar flow to turbulent flow is delayed, and therefore the purpose of reducing navigation resistance is achieved. However, under the actual use condition of the flexible drag reduction coating, the factors of short service life, poor corrosion resistance and the like exist.
In summary, the following problems still exist in the current drag reduction coating technology: (1) the process is complex and difficult to produce and apply in large scale; (2) the coating structure is unstable under the condition that the coating is soaked in seawater, and the physical and mechanical properties of the coating are greatly damaged; (3) most of the resistance reduction technologies are limited to the use conditions of low flow rate and micro flow channels, and cannot be widely applied industrially.
Therefore, the preparation of the anti-drag coating with good anti-drag effect, salt mist resistance and simple processing technology has important significance.
Disclosure of Invention
Aiming at the defects of poor salt resistance, complex production process and unstable structure of the existing antifouling and drag-reducing coating, the invention mainly aims to provide a salt-mist-resistant flexible drag-reducing coating and a preparation method thereof, thereby overcoming the defects in the prior art.
It is also an object of the present invention to provide the use of the salt spray resistant flexible drag reducing coating.
In order to achieve the purpose, the invention adopts the following technical scheme:
the embodiment of the invention provides a preparation method of a salt spray resistant flexible drag reduction coating, which comprises the following steps:
uniformly mixing fluorine-containing silicone rubber, a catalyst and a crosslinking agent to react to form a mixed solution, wherein the fluorine-containing silicone rubber has an-OH end cap, the catalyst is any one of compounds having a hydrolyzable group bonded to a silicon atom, and the crosslinking agent is dibutyltin dilaurate;
and (3) applying the mixed solution to the surface of the substrate in a spraying manner by adopting spraying equipment, and then curing to obtain the salt spray-resistant flexible anti-drag coating.
In some preferred embodiments, the mass ratio of the fluorine-containing silicone rubber, the catalyst and the crosslinking agent is 100: (1-5): 2.
in some preferred embodiments, the preparation method comprises: and applying the mixed solution to the surface of the substrate in a spraying manner by adopting spraying equipment, wherein when the mixed solution is sprayed by adopting the spraying equipment, the spraying speed is 50-80 ml/min, and the spraying distance is 100-200 mm.
In some preferred embodiments, the curing temperature is room temperature, and the curing time is 0.5-24 h.
The embodiment of the invention also provides a salt spray resistant flexible drag reduction coating prepared by the method.
Furthermore, the thickness of the salt spray resistant flexible resistance-reducing coating is 0.4-1.2 mm, the flexibility coefficient is 1-60, the resistance-reducing rate is 1-10%, and the change of the elastic modulus is less than 20% after a salt spray resistant test.
The embodiment of the invention also provides application of the salt-fog-resistant flexible drag reduction coating in the field of surface protection of a navigation body.
Compared with the prior art, the invention has at least the following beneficial effects:
1) the invention takes the fluorine-containing silicon rubber as a main body, is prepared by utilizing different proportions of the fluorine-containing silicon rubber, a catalyst and a cross-linking agent, the cross-linking agent generates hydrolysis reaction when meeting moisture in the air, and is cross-linked with the fluorine-containing silicon rubber (-OH hydroxyl terminated) under the action of the catalyst to form a mixed solution, and the salt-fog-resistant flexible resistance-reducing coating obtained after spraying has excellent salt fog resistance and flexibility;
2) compared with the prior art, the preparation process of the salt spray resistant flexible resistance-reducing coating is simple, the steps of the mixed solution can be performed automatically and manually, the reaction temperature is room temperature, the stable coating can be formed only by simply spraying and curing at room temperature, and the salt spray resistant flexible resistance-reducing coating has good corrosion resistance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow diagram of the process for producing a salt spray resistant flexible drag reducing coating in an exemplary embodiment of the invention;
FIG. 2 is a plot of the drag reduction ratio of the salt spray resistant flexible drag reducing coating prepared in example 1 of the present invention at different disk speeds;
FIG. 3 is a plot of the drag reduction ratio of the salt spray resistant flexible drag reducing coating prepared in example 2 of the present invention at different disk speeds;
FIG. 4 is a plot of the drag reduction ratio of the salt spray resistant flexible drag reducing coating prepared in example 3 of the present invention at different disk speeds;
FIG. 5 is a schematic diagram of the salt spray test results of the salt spray resistant flexible drag reducing coating prepared in example 4 of the present invention;
FIG. 6 is a graph comparing the elastic modulus before and after salt spray testing of a salt spray resistant flexible drag reducing coating prepared in example 4 of the present invention;
FIG. 7 is a graph comparing the drag reduction effect of a natural rubber coating and a fluorine-containing silicone rubber coating prepared in comparative example 1 of the present invention;
FIG. 8 is a graph comparing the infrared test of the natural rubber coating and the fluorine-containing silicone rubber coating prepared in comparative example 1 of the present invention.
Detailed Description
Aiming at the defects of poor salt resistance, complex production process and unstable structure of the existing antifouling and drag reduction coating, the inventor provides the technical scheme of the invention through long-term research and a large amount of practices, the coating prepared by utilizing the fluorine-containing silicone rubber, the catalyst and the cross-linking agent in different proportions has excellent salt mist resistance and flexibility, the method can be suitable for ocean navigation bodies and underwater navigation bodies, the coating is sprayed and constructed by utilizing a spray gun, can be dried and cured at room temperature, and the excellent performance of the coating has great research significance and application prospect. The technical solution, its implementation and principles, etc. will be further explained as follows.
As one aspect of the technical scheme of the invention, the preparation method of the salt spray resistant flexible drag reduction coating comprises the following steps:
uniformly mixing the fluorine-containing silicon rubber, a catalyst and a cross-linking agent, and reacting to form a mixed solution;
and applying the mixed liquid to the surface of a substrate, and then curing to obtain the salt spray-resistant flexible drag-reduction coating.
In some preferred embodiments, the fluorosilicone rubber may comprise a room temperature vulcanizing fluorosilicone rubber, such as, but not limited to, RTV.
In some preferred embodiments, the catalyst is any compound having a hydrolyzable group bonded to a silicon atom, preferably including, but not limited to, ethyl orthosilicate.
In some preferred embodiments, the crosslinking agent may include, but is not limited to, dibutyltin dilaurate. The crosslinking agent is dibutyltin dilaurate which can play a role in delaying catalysis.
In some preferred embodiments, the mixed solution comprises fluorine-containing silicon rubber, a cross-linking agent and a catalyst; the mass ratio of the fluorine-containing silicone rubber to the cross-linking agent to the catalyst is 100: (1-5): 2.
in some preferred embodiments, the preparation method comprises: and uniformly mixing the fluorine-containing silicone rubber, the catalyst and the cross-linking agent in an automatic stirring or manual stirring manner to obtain the mixed solution.
Further, the automatic stirring temperature is room temperature, the stirring speed is 20-80 r/min, and the stirring time is 1-5 min.
Further, the temperature of the manual stirring (speed is not limited, and the mixed solution has certain viscosity) is room temperature, and the stirring time is 3-5 min.
In some preferred embodiments, the preparation method comprises: and applying the mixed solution to the surface of the substrate in a spraying manner by adopting spraying equipment, wherein when the mixed solution is sprayed by adopting the spraying equipment, the spraying speed is 50-80 ml/min, and the spraying distance is 100-200 mm.
Further, the prepared mixed solution is sprayed by a spray gun, and the spraying conditions of the mixed solution are as follows: the spraying speed is 50-80 ml/min, and the spraying distance is 100-200 mm.
In some preferred embodiments, the curing temperature of the coating is room temperature, and the curing time is 0.5-24 h.
Further, the substrate is at least a partial surface of the navigation body; wherein the navigation body comprises a marine navigation body or an underwater navigation body.
In some more specific embodiments, the preparation method of the salt-fog-resistant flexible drag-reducing coating specifically comprises the following steps:
according to the weight parts, the fluorine-containing silicon rubber, the catalyst and the cross-linking agent are put into a beaker, and are automatically (manually) stirred by a stirrer or a glass rod to prepare a mixed solution; and spraying the prepared mixed solution by using a spray gun, and curing and drying at room temperature after the mixed solution is sprayed on the construction surface to obtain the salt spray resistant flexible anti-drag coating. And placing the salt spray resistant flexible drag reduction coating in a salt spray test box to perform a salt spray resistant test and a corrosion resistance test.
Further, the salt spray test pH value of the salt spray resistant flexible drag reduction coating is neutral, the temperature condition is 30-40 ℃, and the test time is 200-5000 h.
The preparation mechanism of the salt mist resistant flexible drag reduction coating is as follows: the fluorine-containing silicon rubber reacts with the catalyst and the cross-linking agent in different proportions, the cross-linking agent is subjected to hydrolysis reaction when meeting moisture in the air and is cross-linked with the fluorine-containing silicon rubber (-OH terminated) under the action of the catalyst to form a mixed solution, and the chemical reaction process is simple and schematic as follows:
wherein X is any hydrolyzable group.
As another aspect of the present invention, it relates to a salt spray resistant flexible drag reducing coating made by the foregoing method.
Further, the thickness of the salt spray resistant flexible drag reduction coating is 0.4 mm-1.2 mm.
Furthermore, the salt spray resistant flexible resistance-reducing coating has a flexibility coefficient of 1-60 and a resistance-reducing rate of 1-10%, and the change of the elastic modulus is less than 20% after a salt spray resistant test.
As another aspect of the technical solution of the present invention, it relates to the use of the aforementioned salt-fog resistant flexible drag reducing coating in the field of surface protection of a navigation body.
Furthermore, the invention also discloses application of the prepared salt-fog-resistant anti-drag flexible film as a coating on the surface of an aircraft body.
Further, the navigation body includes a marine navigation body, a submarine navigation body, and the like, but is not limited thereto.
In conclusion, according to the technical scheme, the salt spray resistant flexible anti-drag coating is prepared by taking the fluorine-containing silicon rubber as a main body, compared with the prior art, the preparation process is simple, the steps of mixing the solution can be performed automatically and manually, the reaction temperature is room temperature, and the stable coating can be formed only by simply spraying and curing at room temperature.
The salt spray resistant flexible anti-drag coating has good corrosion resistance, and mechanical indexes such as elastic modulus, tearing strength and the like of the salt spray resistant flexible anti-drag coating are not changed much from those of an original coating after a salt spray test for a certain time.
The technical solutions of the present invention will be described in further detail below with reference to several preferred embodiments and accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. It is to be noted that the following examples are intended to facilitate the understanding of the present invention, and do not set forth any limitation thereto. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. The test methods in the following examples, which are not specified under specific conditions, are generally carried out under conventional conditions.
Example 1
Mixing fluorine-containing silicon rubber (room temperature vulcanized fluorosilicone rubber), dibutyltin dilaurate and ethyl orthosilicate according to the weight ratio of 100: 5: 2, placing the mixture in a beaker, and automatically stirring the mixture at room temperature by using a stirrer at the rotating speed of 50r/min for 3 min. The prepared mixed solution is placed in a Primoy JSHH12B spray gun, spraying is carried out at the room temperature of 22 ℃, the spraying speed is 50ml/min, the spraying distance is 150mm, the mixed solution is sprayed on a pattern with the radius of 15cm of a rotary disc resistance test platform as shown in figure 1, room-temperature curing and drying are carried out, the curing time is 12 hours, the thickness of the finally obtained coating is 0.4-1.2 mm, a resistance test experiment with the rotating speed of 400-700 r/min is carried out, the experiment result is shown in table 1, figure 2 is a resistance reducing rate graph of the salt spray resistant flexible resistance reducing coating prepared according to the embodiment and obtained by summarizing the table 1 under different water flow speeds, and the maximum resistance reducing rate of the coating is 6.6%.
TABLE 1 Friction force of smooth surface and the coating at different rotation speeds
Example 2
Mixing fluorine-containing silicon rubber (room temperature vulcanized fluorosilicone rubber), dibutyltin dilaurate and ethyl orthosilicate according to the weight ratio of 100: 5: 2, placing the mixture in a beaker, and automatically stirring the mixture at room temperature by using a stirrer at the rotating speed of 20r/min for 1 min. The prepared mixed solution is placed in a Primoy JSHH12B spray gun, spraying is carried out at the room temperature of 22 ℃, the spraying speed is 60ml/min, the spraying distance is 100mm, the mixed solution is sprayed on a model with the radius of 15cm of a rotary disc resistance testing platform as shown in figure 1, room temperature curing and drying are carried out, the curing time is 12 hours, the thickness of the finally obtained coating is 0.4-1.2 mm, a resistance testing experiment with the rotating speed of 400-700 r/min is carried out, the experimental result is shown in table 2, figure 3 is a resistance reducing rate graph of the salt spray resistant flexible resistance reducing coating prepared according to the embodiment and obtained by summarizing the table 2 under different disc speeds, and the maximum resistance reducing rate of the coating is 3.7%.
TABLE 2 Friction forces of smooth surfaces and the coatings at different rotational speeds
Example 3
Mixing fluorine-containing silicon rubber (room temperature vulcanized fluorosilicone rubber), dibutyltin dilaurate and ethyl orthosilicate according to the weight ratio of 100: 5: 2, placing the mixture in a beaker, and automatically stirring the mixture at room temperature by using a stirrer at the rotating speed of 80r/min for 5 min. The prepared mixed solution is placed in a Primoy JSHH12B spray gun, spraying is carried out at the room temperature of 22 ℃, the spraying speed is 80ml/min, the spraying distance is 200mm, the mixed solution is sprayed on a pattern with the radius of 15cm of a rotary disc resistance testing platform as shown in figure 1, room-temperature curing and drying are carried out, the curing time is 12 hours, the thickness of the finally obtained coating is 0.4-1.2 mm, a resistance testing experiment with the rotating speed of 400-700 r/min is carried out, the experimental result is shown in table 3, figure 4 is a resistance reducing rate graph of the salt spray resistant flexible resistance reducing coating prepared according to the embodiment and obtained by summarizing the table 3 under different disc speeds, and the maximum resistance reducing rate of the coating is 6.5%.
TABLE 3 Friction forces of smooth surfaces and the coatings at different rotational speeds
Example 4
Mixing fluorine-containing silicon rubber (room temperature vulcanized fluorosilicone rubber), dibutyltin dilaurate and ethyl orthosilicate according to the weight ratio of 100: 5: 2, placing the mixture in a beaker, and automatically stirring the mixture at room temperature by using a stirrer at the rotating speed of 50r/min for 3 min. The prepared mixed solution is placed in a Primoy JSHH12B spray gun, spraying is carried out at the room temperature of 22 ℃, the spraying speed is 50ml/min, the spraying distance is 150mm, the mixed solution is sprayed on a glass plate with the size of 100 multiplied by 100mm, room-temperature curing and drying are carried out, the curing time is 12 hours, then the obtained coating is placed in a salt spray test box, the pH value in the test box is 6.2-7.4, the test temperature is 35 ℃, the test duration is 500 hours, after the salt spray time is over, the appearance is shown in figure 5, the original coating and the salt spray test coating are tested for the elastic modulus by a universal testing machine, the test result is shown in figure 6, and the change is within an acceptable range.
Example 5
This embodiment is substantially the same as embodiment 1 except that: the mass ratio of the fluorine-containing silicone rubber, the cross-linking agent and the catalyst is 100: 1: 2, in the embodiment, the stirring is performed manually by using a stirrer at room temperature, the stirring time is 5min, and the final curing time is 0.5 h.
Example 6
This embodiment is substantially the same as embodiment 1 except that: the mass ratio of the fluorine-containing silicone rubber, the cross-linking agent and the catalyst is 100: 3: 2, in the embodiment, the stirring is performed manually by using a stirrer at room temperature, the stirring time is 3min, and the final curing time is 24 h.
The inventors also tested various properties of the coatings obtained in examples 5 to 6, and the results were substantially the same as those of examples 1 to 4.
Comparative example 1
Adopting a natural rubber coating, wherein the weight ratio of a natural rubber solution to ammonia water is 3: 2 (the ammonia water is only used for preserving the natural latex solution, does not participate in the reaction, and volatilizes after being cured), placing the prepared mixed solution in a Prigy JSHH12B spray gun, spraying under the conditions of room temperature 22 ℃, the spraying speed of 50ml/min and the spraying distance of 150mm, spraying on a 15 cm-radius sample of a rotating disc resistance test platform, the preparation method is similar to that of the sample shown in figure 1, curing and drying at room temperature for 12h, the thickness of the finally obtained coating is 0.4 mm-1.2 mm, carrying out resistance test experiments at the rotating speed of 400-700 r/min, comparing the friction force of the natural latex coating with the fluorine-containing silicon rubber at 0.8mm, and comparing the results with the friction force of the fluorine-containing silicon rubber, shown in table 4, shown in figure 8, an infrared test chart (calibrating C-F bond in infrared test) of the fluorine-containing silicon rubber and the natural rubber coating, shown in figure 7, is a comparison chart, from fig. 7 it can be seen that the coating has no drag reducing effect under this condition.
TABLE 40.8 mm Natural rubber coating vs. Fluorosilicone rubber Friction results
The aspects, embodiments, features and examples of the present invention should be considered as illustrative in all respects and not intended to be limiting of the invention, the scope of which is defined only by the claims. Other embodiments, modifications, and uses will be apparent to those skilled in the art without departing from the spirit and scope of the claimed invention.
The use of headings and chapters in this disclosure is not meant to limit the disclosure; each section may apply to any aspect, embodiment, or feature of the disclosure.
Throughout this specification, where a composition is described as having, containing, or comprising specific components or where a process is described as having, containing, or comprising specific process steps, it is contemplated that the composition of the present teachings also consist essentially of, or consist of, the recited components, and the process of the present teachings also consist essentially of, or consist of, the recited process steps.
Unless specifically stated otherwise, use of the terms "comprising", "including", "having" or "having" is generally to be understood as open-ended and not limiting.
It should be understood that the order of steps or the order in which particular actions are performed is not critical, so long as the teachings of the invention remain operable. Further, two or more steps or actions may be performed simultaneously.
In addition, the inventors of the present invention have also made experiments with other materials, process operations, and process conditions described in the present specification with reference to the above examples, and have obtained preferable results.
While the invention has been described with reference to illustrative embodiments, it will be understood by those skilled in the art that various other changes, omissions and/or additions may be made and substantial equivalents may be substituted for elements thereof without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims. Moreover, unless specifically stated any use of the terms first, second, etc. do not denote any order or importance, but rather the terms first, second, etc. are used to distinguish one element from another.
Claims (10)
1. A preparation method of a salt-fog-resistant flexible drag-reduction coating is characterized by comprising the following steps:
uniformly mixing fluorine-containing silicone rubber, a catalyst and a crosslinking agent to react to form a mixed solution, wherein the fluorine-containing silicone rubber has an-OH end cap, the catalyst is any one of compounds having a hydrolyzable group bonded to a silicon atom, and the crosslinking agent is dibutyltin dilaurate;
and (3) applying the mixed solution to the surface of the substrate in a spraying manner by adopting spraying equipment, and then curing to obtain the salt spray-resistant flexible anti-drag coating.
2. The method of claim 1, wherein: the mass ratio of the fluorine-containing silicone rubber to the cross-linking agent to the catalyst is 100: (1-5): 2; and/or the fluorine-containing silicone rubber comprises room temperature vulcanized fluorosilicone rubber; and/or, the catalyst comprises ethyl orthosilicate.
3. The production method according to claim 1, characterized by comprising: and uniformly mixing the fluorine-containing silicone rubber, the catalyst and the cross-linking agent in an automatic stirring or manual stirring manner to obtain the mixed solution.
4. The production method according to claim 3, characterized in that: the automatic stirring temperature is room temperature, the stirring speed is 20-80 r/min, and the stirring time is 1-5 min.
5. The production method according to claim 3, characterized in that: the temperature of manual stirring is room temperature, and the stirring time is 3-5 min.
6. The method of claim 1, wherein: and when spraying equipment is adopted to spray the mixed solution, the spraying speed is 50-80 ml/min, and the spraying distance is 100-200 mm.
7. The method of claim 1, wherein: the curing temperature is room temperature, and the curing time is 0.5-24 h.
8. The method of claim 1, wherein: the substrate is at least a partial surface of the navigation body; preferably, the navigation body comprises a marine navigation body or an underwater navigation body.
9. A salt spray resistant flexible drag reducing coating produced by the process of any of claims 1-8; preferably, the thickness of the salt spray resistant flexible resistance-reducing coating is 0.4-1.2 mm, the flexibility coefficient is 1-60, the resistance-reducing rate is 1-10%, and the change of the elastic modulus is less than 20% after a salt spray resistant test.
10. Use of the salt-fog resistant flexible drag reducing coating of claim 9 in the field of surface protection of a navigation body; preferably, the navigation body comprises a marine navigation body or an underwater navigation body.
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