Flame-retardant strippable coating for ship outfitting protection as well as preparation method and application of flame-retardant strippable coating

Abstract

The invention discloses a flame-retardant strippable coating for ship outfitting protection, which is composed of the following components in percentage by mass: 13-19% of base resin, 3-6% of organic flame retardant, 4-6% of inorganic flame retardant, 1-3% of filler, 0.1-0.4% of pigment, 1.2-1.8% of assistant and 65-73% of solvent. According to the coating, the flame retardant property, the mechanical property, the strippable property and the medium resistance are comprehensively improved, various performance indexes are remarkably superior to those of the prior art, the technical problems which are expected to be solved for a long time but cannot be successfully solved all the time in the field are solved, and the coating has outstanding substantive features and remarkable progress.

Description

Technical Field

[0001] This invention relates to the field of polymer composite materials and protective coatings, specifically to flame-retardant peelable coatings for ship outfitting protection, their preparation methods, and applications. Background Technology

[0002] During shipbuilding, dry-docking, and component transportation, a large number of outfitting components (such as valves, pumps, cables, interior trim, rubber fenders, and painted hull areas) are exposed to complex working environments, facing multiple threats including welding spatter, mechanical scratches, salt spray corrosion, and potential fire risks. Temporary protection is typically required to prevent damage. Traditional protective methods, such as covering with plastic film or applying protective tape, suffer from poor flame retardancy, easy detachment, difficulty in adhering to complex surfaces, and residue residue upon removal. Furthermore, they fail to meet the stringent fire safety standards of the shipbuilding industry (such as the SOLAS Convention).

[0003] Most publicly available peelable coating technologies are concentrated in the civilian sector. They also pose environmental and safety risks. The use of bromine-antimony flame retardants may produce toxic fumes during combustion, contradicting green environmental trends and potentially limiting disposal options. Furthermore, their protective period is limited in extreme environments such as high humidity and high salt spray. Peel control is simplistic, failing to address the impact on peel strength across different substrates, potentially hindering the application of coatings to complex working conditions. They exhibit poor water resistance, chemical resistance, and mechanical strength, lack flame retardant properties, show uneven adhesion to low surface energy substrates like rubber, and have difficulty precisely controlling peel force. They are prone to aging and cracking in high humidity, high salt spray, and ultraviolet radiation environments, particularly in marine environments.

[0004] Therefore, existing peelable coatings generally suffer from one or more of the following defects: 1) Low flame retardancy rating, failing to meet ship fire protection requirements; 2) Excessive use of inorganic fillers for flame retardancy, severely damaging the coating's flexibility and peelability; 3) Lack of universality for various common ship substrates such as EPDM rubber and epoxy / polyurethane paint, making it difficult to balance adhesion, resulting in poor adhesion and premature peeling of epoxy / polyurethane paint, and EPDM rubber being too tightly bonded to be completely peeled off; 4) Insufficient environmental durability (salt spray resistance, UV resistance), failing to meet the protection requirements for protection periods lasting several months. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a functional coating and its preparation method for providing temporary protection for various outfitting components (including metal components, rubber products, and painted surfaces) during ship construction and maintenance, possessing excellent flame retardant properties, mechanical strength, and controllable peelability. This coating must simultaneously meet the following requirements: 1) High flame retardant rating (LOI>28%); 2) Good mechanical properties to withstand on-site impacts; 3) Firm adhesion to various substrates such as EPDM rubber and epoxy paint, and complete and clean peelability after the protection period without damaging the substrate; 4) Excellent resistance to marine environments (salt spray resistance, UV aging resistance).

[0006] This invention discloses a flame-retardant peelable coating for ship outfitting protection, which comprises the following components by mass ratio: Base resin 13~19% Organic flame retardants 3-6% Inorganic flame retardant 4~6% 1-3% of filler Pigment 0.1~0.4% Additives 1.2~1.8% Solvent 65~73%; The base resin is composed of three components with a total mass percentage of 100%: the first component is maleic anhydride-grafted SEBS resin, accounting for 60%; the second component is phenolic resin, accounting for 20%; and the third component is a mixture of one or two of modified ethylene acrylate resin and chlorinated ether resin, accounting for 20%.

[0007] Furthermore, the grafting rate of the maleic anhydride-grafted SEBS resin is 1.5% to 2.0%.

[0008] Furthermore, the organic flame retardant is one or more of decabromodiphenyl ethane, pentabromoethylbenzene, tetrabromobisphenol A, and triphenyl phosphate.

[0009] Furthermore, the inorganic flame retardant is composed of component A and component B, wherein component A is nano-sized aluminum hydroxide, and component B is selected from two or more of antimony trioxide, aluminum tripolyphosphate, zinc borate, and ammonium polyphosphate; the mass ratio of component A to component B is 1:2 to 1:7.

[0010] Furthermore, the nano-sized aluminum hydroxide is aluminum hydroxide obtained through the following pretreatment steps: first, the nano-sized aluminum hydroxide is dried, then the dried nano-sized aluminum hydroxide is surface modified with an ethanol solution of silane coupling agent, and finally dried to obtain pretreated nano-sized aluminum hydroxide. Furthermore, the filler is composed of fumed hydrophobically modified silica and talc powder, wherein the talc powder is one or more of 400-mesh talc powder, 1250-mesh talc powder, and 4000-mesh talc powder.

[0011] Furthermore, the pigment is one or more of the following: ultramarine, turquoise, phthalocyanine green, light phthalocyanine blue, and scarlet.

[0012] Furthermore, the additives are: a wetting and dispersing agent selected from DISPERBYK-163, DISPERBYK-174, DISPERBYK-165, and DISPERBYK-115; a defoamer selected from BYK-051, BYK-A-535, BYK-065, and BYK-071; and silicone oil, white oil, surfactant, and antioxidant 1010+168.

[0013] Furthermore, the solvent is two or more of xylene, diethylene glycol butyl ether, dioctyl oxalate, and cyclohexane.

[0014] A second aspect of the present invention provides a method for preparing the above-mentioned flame-retardant peelable coating for ship outfitting protection, comprising the following steps: Solvent is added to the resin dissolving vessel, stirring is started, and the speed is set to 700-900 rpm. All the base resin is added and completely dissolved. Then, the wetting and dispersing agent, defoamer, silicone oil, white oil, surfactant, and antioxidant from the additives are added and dispersed evenly. After that, the speed is increased to 900-1000 rpm, and organic flame retardant, inorganic flame retardant, filler, and pigment are added in sequence while stirring. After being stirred evenly in a high-speed mixer, the viscosity of the system is adjusted with a viscosity modifier. The mixture is then ground and dispersed in a sand mill until the fineness is ≤40μm, filtered, and packaged as the finished product.

[0015] Beneficial effects Compared with existing publicly disclosed similar technologies, this invention breaks through long-standing technical biases in the field. Through the synergistic effect of multiple core technology systems, it achieves a systematic improvement in several key properties of flame-retardant peelable coatings, possessing outstanding substantive features and significant progress. The synergistic effects and specific beneficial effects of each technology system are as follows: 1. A physical-chemical dual-crosslinked network film-forming matrix resolves the inherent contradiction between mechanical properties and peelability, providing a structural basis for multi-performance synergy. This invention innovatively employs a composite of maleic anhydride-grafted modified SEBS, terpene phenolic resin, modified ethylene acrylate resin, and chlorinated ether resin as the film-forming system for a peelable coating: by grafting maleic anhydride onto the nonpolar SEBS molecular chain, polar anhydride reaction sites are introduced, which can covalently bond with the phenolic hydroxyl groups of the terpene phenolic resin to form a chemical cross-linking network; at the same time, the polystyrene hard segments grafted onto the SEBS by maleic anhydride can form physical cross-linking points, which interpenetrate with the above-mentioned chemical cross-linking network to construct a stable physical-chemical double cross-linking structure. Unlike existing flame-retardant peelable coatings, which often suffer from the inability to simultaneously achieve both mechanical strength and peelability, this dual-crosslinked network enhances the interfacial bonding between the two resin phases through chemical bonding. This allows the film-forming matrix to simultaneously possess the high strength characteristics of terpene phenolic resins (measured average tensile strength reaches 7.27 MPa, an improvement of 55.71% compared to existing technologies), the excellent media resistance of modified ethylene acrylate resins and chloroether resins, and the high elasticity and flexibility of maleic anhydride-grafted SEBS (measured average elongation at break reaches 450%, an improvement of 82.19% compared to existing technologies). This provides a structural basis for coatings to maintain excellent mechanical properties and peelability even in high-filler-content flame-retardant systems, fundamentally solving the industry-wide common problem of the incompatibility between high flame retardancy and high mechanical properties in traditional technologies.

[0016] 2. The composite synergistic flame retardant system and filler surface modification technology form a "structure-performance" linkage with the film-forming matrix, achieving a balance between flame retardancy and flexibility. This invention employs a halogen-free flame-retardant system composed of organic and inorganic flame retardants. Simultaneously, surface modification of the inorganic flame retardant nano-aluminum hydroxide is achieved through a silane coupling agent, significantly improving the dispersibility and interfacial compatibility of the inorganic filler in the organic resin matrix. One end of the silane coupling agent can form a chemical bond with the hydroxyl groups on the surface of the nano-aluminum hydroxide, while the other end can react with active sites such as anhydride groups and phenolic hydroxyl groups in the double cross-linked network. This transforms the flame-retardant filler from a simple filling phase into part of the cross-linked network, achieving enhanced interfacial bonding between the filler and the matrix. This significantly improves the dispersibility and interfacial compatibility of the inorganic filler in the organic resin matrix, avoiding filler agglomeration and interfacial defects at high filler contents. By screening halogen-free, environmentally friendly intumescent flame retardants and optimizing the proportions of each component, the environmental hazards of halogen-containing flame retardants are avoided. Unlike existing technologies that either suffer from insufficient flame retardant performance (the average measured oxygen index of existing technologies is only 21.53%) or excessive filling with unmodified flame retardants to achieve a flame-retardant effect, resulting in brittle, cracked, and difficult-to-peel coatings, existing technologies generally believe that the amount of flame-retardant filler added is negatively correlated with the mechanical properties of the coating, and that improving flame retardant performance requires sacrificing the flexibility and peelability of the coating. However, this invention achieves unconventional performance improvements through the synergistic effect of surface modification technology and a dual crosslinked network: the flame-retardant filler participates in the construction of the crosslinked network, not only without degrading mechanical properties, but also further enhancing the stability and resistance to media of the crosslinked network. In the combustion process, the composite flame retardant system of this invention utilizes the intumescent flame retardant aluminum tripolyphosphate to form a dense, expanded char layer. The decomposition product of surface-modified nano-aluminum hydroxide, aluminum oxide, serves as a reinforcing "skeleton" embedded within the char layer, significantly enhancing its strength, density, and thermal insulation properties, achieving a triple synergistic effect of "gas-phase flame retardancy - condensed-phase flame retardancy - thermal insulation." Meanwhile, the filler surface modification technology ensures that even with high flame retardant additions, the filler and resin matrix maintain a good interfacial bond, ultimately resulting in a coating oxygen index (LOI) exceeding 28%, a 35.45% improvement over existing technologies, meeting the B1 flame retardant requirements of the shipbuilding industry. Simultaneously, it minimizes the negative impact of high flame retardant loading on coating flexibility and peelability, avoiding the performance degradation issues caused by simply increasing the flame retardant loading in existing technologies.

[0017] 3. Interfacial force regulation technology enables synergistic adaptation of "coating-substrate interface performance" and "overall coating performance," overcoming the technical barriers to multi-substrate adaptation. This invention introduces a reactive silicone surfactant through interfacial force regulation design. Unlike the non-reactive surfactants used in the prior art that can only migrate to the interface to exert their effects, the reactive groups of the reactive silicone surfactant used in this invention can participate in the curing reaction of the double cross-linked network and are evenly distributed at the coating body and interface. While improving the wetting and spreading performance of the coating on low surface energy substrates, it does not cause a decline in the performance of the coating body due to excessive migration of surfactants, thus achieving synergistic optimization of interfacial performance and body performance. It can adapt to the temporary protection needs of various types of substrates during ship outfitting: For low surface energy and easily swollen rubber substrates such as EPDM rubber, it can achieve complete peeling of the film and has excellent solvent penetration resistance. The measured 180° peel strength with EPDM rubber sheet is only 244 N / m, which is 64.12% lower than the existing technology. There is no residue and no damage to the rubber substrate during peeling. For high surface energy paints such as epoxy hull paint, by introducing reactive organosilicon surfactants, it can improve the wetting and spreading performance of the coating on the substrate, while using its reactive groups to provide controllable interfacial anchoring force. The siloxane segments form a slip layer at the interface, achieving a performance balance between "firm adhesion during construction" and "complete peeling after protection". The measured 180° peel strength with epoxy hull paint is only 138 N / m, which is 75.73% lower than the existing technology. Unlike existing technologies that cannot simultaneously meet the temporary protection needs of rigid materials such as flexible rubber materials, epoxy hull paint, and carbon steel plates, the core formulation system of this invention can be adjusted with a small number of components to create specialized protective coatings suitable for different ship substrates, significantly improving the application scope and engineering value of the technology. (Existing technologies typically require the development of completely independent formulation systems for substrates with different surface energies, making it impossible to achieve multi-substrate compatibility through a single core formulation. However, the interface control technology of this invention, combined with the dual-crosslinked matrix and flame-retardant system, creates a synergistic effect. Only the amount of surfactant added (0.2~1.0wt%) needs to be adjusted to create specialized protective coatings suitable for different ship substrates, without requiring significant adjustments to the film-forming system and flame-retardant system.) The product of this invention achieves a 100% pass rate in the 500-hour salt spray test, while the pass rate of existing technology products is only 33.3%. Its superior corrosion resistance can meet the temporary protection needs of marine atmospheric environments for more than 6 months, significantly improving the application scope and engineering value of the technology, and reducing the procurement and management costs of temporary protective materials during ship construction by more than 30%.

[0018] 4. The outstanding creativity brought about by the overall synergistic effect of multiple technology systems This invention is not a simple superposition of multiple existing technical features, but rather breaks through three long-standing technical biases in the field: ① it breaks the perception that "high strength and high flexibility are mutually exclusive" in film-forming systems; ② it overturns the perception that "improved flame retardant performance inevitably sacrifices mechanical properties" in flame retardant technology; ③ it breaks through the perception that "the same formulation cannot be adapted to multiple types of substrates" in interface technology. These three core technical systems support and synergize with each other, forming a complete technical closed loop of "structural support - performance enhancement - interface adaptation," ultimately achieving a comprehensive improvement in flame retardant performance, mechanical properties, peelability, and media resistance. All performance indicators are significantly superior to existing technologies, solving a long-standing technical problem that the field has sought to solve but has yet to achieve success in, demonstrating outstanding substantive features and significant progress. Detailed Implementation

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0020] 10.0g of inorganic flame retardant nano-aluminum hydroxide was weighed, dried, and then surface-treated with an ethanol solution of silane coupling agent. After drying, pretreated nano-aluminum hydroxide was obtained.

[0021] Weigh 350g xylene, 200g dioctyl oxalate, and 100g cyclohexane and add them to the resin dissolving vessel. Start the stirrer and set the speed to 800 rpm. Weigh 84g maleic anhydride-grafted SEBS resin, 28g terpene phenolic resin, and 28g chloroether resin and add them to the resin dissolving vessel. After the resin is completely dissolved, add 5g wetting and dispersing agent DISPERBYK163, 3g defoamer BYK-051, 1g silicone oil, and 2g 46# white oil. 1g of antioxidant 1010+168, after all additives are evenly dispersed, set the rotation speed to 900rpm, weigh 35g of organic flame retardant pentabromoethylbenzene, 30g of inorganic flame retardant antimony trioxide, 5g of pretreated nano-sized aluminum hydroxide, 5g of aluminum tripolyphosphate, 10g of fumed hydrophobically modified silica, 10g of 400-mesh talc powder, and 2g of special black powder. After stirring evenly, grind and disperse the mixture in a sand mill until the fineness is ≤40μm, and then filter the material. Example 2

[0022] 15.0g of inorganic flame retardant nano-aluminum hydroxide was weighed, dried, and then surface-treated with an ethanol solution of silane coupling agent. After drying, pretreated nano-aluminum hydroxide was obtained.

[0023] Weigh 400g xylene, 100g dioctyl oxalate, and 100g diethylene glycol butyl ether and add them to the resin dissolving kettle. Turn on the stirrer and set the speed to 750 rpm. Weigh 87g maleic anhydride-grafted SEBS resin, 29g terpene phenolic resin, and 29g modified ethylene acrylate resin and add them to the resin dissolving kettle. After the resin is completely dissolved, add 5g wetting and dispersing agent DISPERBYK165, 3g defoamer BYK-065, 1g silicone oil, and 2g... After dispersing 46# white oil, 1g antioxidant 1010+168, and various additives evenly, set the rotation speed to 900rpm, weigh out 40g organic flame retardant decabromodiphenyl ethane, 15g inorganic flame retardant zinc borate, 15g pretreated nano-grade aluminum hydroxide, 15g ammonium polyphosphate, 15g fumed hydrophobically modified silica filler, 5g 4000-mesh talc powder, and 2g phthalocyanine green. After stirring evenly, grind and disperse the mixture in a sand mill until the fineness is ≤40μm, and then filter out the material. Example 3

[0024] 20.0g of inorganic flame retardant nano-aluminum hydroxide was weighed, dried, and then surface-treated with an ethanol solution of silane coupling agent. After drying, pretreated nano-aluminum hydroxide was obtained.

[0025] Weigh 400g xylene, 100g dioctyl oxalate, 150g diethylene glycol butyl ether, and 50g cyclohexane and add them to the resin dissolving vessel. Turn on the stirrer and set the speed to 850 rpm. Weigh 111g maleic anhydride-grafted SEBS resin, 37g terpene phenolic resin, 18g chloroform resin, and 17g modified ethylene acrylate resin and add them to the resin dissolving vessel. After the resin is completely dissolved, add 5g wetting and dispersing agent DISPERBYK115, 3g defoamer BYK-A-535, and 1g silicone oil. 2g of 46# white oil, 1g of antioxidant 1010+168, and various additives were dispersed evenly. The rotation speed was set to 950rpm. 50g of organic flame retardant triphenyl phosphate, 15g of inorganic flame retardant zinc borate, 20g of pretreated nano-sized aluminum hydroxide, 15g of ammonium polyphosphate, 10g of ammonium tripolyphosphate, 10g of fumed hydrophobic modified silica, 10g of 1250-mesh talc powder, and 2g of light phthalocyanine blue were weighed out. After stirring evenly, the mixture was ground and dispersed in a sand mill until the fineness was ≤40μm, and then filtered out.

[0026] Comparative Example 1: Weigh 350g xylene, 200g dioctyl oxalate, and 100g cyclohexane and add them to the resin dissolving kettle. Turn on the stirrer and set the speed to 800 rpm. Weigh 84g SEBS resin and 28g chloroether resin and add them to the resin dissolving kettle. After the resin is completely dissolved, add 5g wetting and dispersing agent DISPERBYK165 and 3g defoamer BYK-065. After all the additives are evenly dispersed, set the speed to 900 rpm. Weigh 30g decabromodiphenyl ethane, 30g antimony trioxide, 10g fumed hydrophobically modified silica, 20g 400-mesh talc powder, and 5g black powder. Stir evenly and then grind and disperse the mixture in a sand mill until the fineness is ≤40μm. Filter the mixture and discharge it.

[0027] Comparative Example 2: Weigh 400g xylene, 100g dioctyl oxalate, and 100g diethylene glycol butyl ether and add them to the resin dissolving kettle. Start stirring and set the speed to 750 rpm. Weigh 87g maleic anhydride-grafted SEBS resin, 29g terpene phenolic resin, and 29g modified ethylene acrylate resin and add them to the resin dissolving kettle. After the resin is completely dissolved, add 5g wetting and dispersing agent DISPERBYK165, 3g defoamer BYK-065, 1g silicone oil, 2g 46# white oil, and 1g antioxidant 1010+168. After all the additives are evenly dispersed, set the speed to 900 rpm. Weigh 15g zinc borate, 15g aluminum hydroxide filler, 15g fumed hydrophobically modified silica, 5g 4000-mesh talc powder, and 2g phthalocyanine green. Stir evenly and then grind and disperse the mixture using a sand mill until the fineness is ≤40μm. Filter the mixture and discharge.

[0028] Comparative Example 3: Weigh 20.0g of inorganic flame retardant nano aluminum hydroxide, dry it, then surface treat it with an ethanol solution of silane coupling agent, and dry it for later use.

[0029] Weigh 400g xylene, 100g dioctyl oxalate, 150g diethylene glycol butyl ether, and 50g cyclohexane and add them to the resin dissolving kettle. Turn on the stirrer and set the speed to 850 rpm. Weigh 100g SEBS resin and 35g modified ethylene acrylate resin and add them to the resin dissolving kettle. After the resin is completely dissolved, add 5g wetting and dispersing agent DISPERBYK115, 3g defoamer BYK-A-535, and various additives. After dispersing evenly, set the speed to 950 rpm. Weigh 50g organic flame retardant triphenyl phosphate, 15g inorganic flame retardant zinc borate, 20g aluminum hydroxide, 15g ammonium polyphosphate, 10g ammonium tripolyphosphate, 10g filler fumed hydrophobically modified silica, 10g 1250-mesh talc powder, and 2g light phthalocyanine blue. After stirring evenly, grind and disperse the mixture using a sand mill until the fineness is ≤40μm, and then filter the material. Implementation effect

[0030] The coatings from the above examples and comparative examples were brushed onto the surfaces of EPDM rubber sheets and epoxy hull paints cleaned with acetone, and cured at room temperature for 7 days. The performance tests are compared below:

[0031] As shown in the table above, the resins prepared in this invention (Examples 1, 2, and 3), even with the addition of tackifying resins or coupling agents, can still significantly improve the interfacial compatibility and cohesive strength of the coating with EPDM rubber and epoxy hull paint. Its excellent flexibility, high peel strength, and long-lasting salt spray protection ability are due to the synergistic flame retardant effect of nano-aluminum hydroxide and intumescent flame retardants after pretreatment with organic and inorganic flame retardants, as well as the synergistic modification effect of carbon layer resin molecular chains. This not only strengthens the interfacial hydrogen bonds and van der Waals forces, but also forms a dense carbon layer when heated, effectively isolating heat and oxygen transfer. The data above shows that Example 3 exhibits the best overall performance, with a tensile strength of 8 MPa, elongation of 600%, EPDM peel strength of 267 N / m, and excellent protective properties after 500 hours of salt spray testing. Its limiting oxygen index is 29.3%, demonstrating superior mechanical compatibility, interfacial stability, and inherent flame retardancy. In contrast, Comparative Examples 1 and 2 suffer from interfacial bonding failure due to the lack of key components, while Comparative Example 3, although meeting flame retardancy standards, shows a sharp decline in flexibility and peel performance—this confirms the irreplaceable nature of precise proportions and synergistic effects among the components. Therefore, this invention achieves a three-dimensional balance of flame retardancy, interfacial adhesion, and corrosion resistance without sacrificing flexibility through molecular structure design and multi-scale filler synergistic control. This breakthrough balance enables the coating to exhibit strong adaptability in dynamic service scenarios such as ship decks and rubber sealing joints.

[0032] This disclosure has been described with reference to the foregoing embodiments; however, these embodiments are merely examples for implementing this disclosure. It must be noted that the disclosed embodiments do not limit the scope of this disclosure. On the contrary, any changes and modifications made without departing from the spirit and scope of this disclosure are within the scope of patent protection of this disclosure.

Claims

1. A flame-retardant peelable coating for ship outfitting protection, characterized in that: By mass ratio, it consists of the following components: Base resin 13~19% Organic flame retardants 3-6% Inorganic flame retardant 4~6% 1-3% of filler Pigment 0.1~0.4% Additives 1.2~1.8% Solvent 65~73%; The base resin is composed of three components with a total mass percentage of 100%: the first component is maleic anhydride-grafted SEBS resin, accounting for 60%; the second component is phenolic resin, accounting for 20%; and the third component is a mixture of one or two of modified ethylene acrylate resin and chlorinated ether resin, accounting for 20%.

2. The flame-retardant peelable coating for ship outfitting protection according to claim 1, characterized in that: The grafting rate of the maleic anhydride-grafted SEBS resin is 1.5% to 2.0%.

3. The flame-retardant peelable coating for ship outfitting protection according to claim 1, characterized in that: The organic flame retardant is one or more of decabromodiphenyl ethane, pentabromoethylbenzene, tetrabromobisphenol A, and triphenyl phosphate.

4. The flame-retardant peelable coating for ship outfitting protection according to claim 1, characterized in that: The inorganic flame retardant is composed of component A and component B, wherein component A is nano-sized aluminum hydroxide, and component B is selected from two or more of antimony trioxide, aluminum tripolyphosphate, zinc borate, and ammonium polyphosphate; the mass ratio of component A to component B is 1:2 to 1:

7.

5. The flame-retardant peelable coating for ship outfitting protection according to claim 4, characterized in that: The nano-sized aluminum hydroxide is obtained through the following pretreatment steps: first, the nano-sized aluminum hydroxide is dried, then the dried nano-sized aluminum hydroxide is surface modified with an ethanol solution of silane coupling agent, and finally dried to obtain pretreated nano-sized aluminum hydroxide.

6. The flame-retardant peelable coating for ship outfitting protection according to claim 1, characterized in that: The filler is composed of fumed hydrophobically modified silica and talc powder, wherein the talc powder is one or more of 400 mesh talc powder, 1250 mesh talc powder, and 4000 mesh talc powder.

7. The flame-retardant peelable coating for ship outfitting protection according to claim 1, characterized in that: The pigment is one or more of the following: ultramarine, turquoise, phthalocyanine green, light phthalocyanine blue, and scarlet.

8. The flame-retardant peelable coating for ship outfitting protection according to claim 1, characterized in that: The additives are: wetting and dispersing agents are one or more of DISPERBYK-163, DISPERBYK-174, DISPERBYK-165, and DISPERBYK-115; defoamers are one or more of BYK-051, BYK-A-535, BYK-065, and BYK-071; silicone oil, white oil, surfactant, and antioxidant 1010+168.

9. The flame-retardant peelable coating for ship outfitting protection according to claim 1, characterized in that: The solvent is two or more of xylene, diethylene glycol butyl ether, dioctyl oxalate, and cyclohexane.

10. A method for preparing a flame-retardant peelable coating for ship outfitting protection according to any one of claims 1-9, characterized in that, Includes the following steps: Solvent is added to the resin dissolving vessel, stirring is started, and the speed is set to 700-900 rpm. All the base resin is added and completely dissolved. Then, the wetting and dispersing agent, defoamer, silicone oil, white oil, surfactant, and antioxidant from the additives are added and dispersed evenly. After that, the speed is increased to 900-1000 rpm, and organic flame retardant, inorganic flame retardant, filler, and pigment are added in sequence while stirring. After being stirred evenly in a high-speed mixer, the viscosity of the system is adjusted with a viscosity modifier. The mixture is then ground and dispersed in a sand mill until the fineness is ≤40μm, filtered, and packaged as the finished product.

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