Anticorrosive flame-retardant multiple-effect upgraded full-scene high-performance coating composition and application thereof

Abstract

The invention provides an anti-corrosion flame-retardant multiple-effect upgraded full-scene high-performance coating composition and application thereof. The anticorrosive flame-retardant multiple-effect upgraded full-scene high-performance coating composition is prepared from the following components in parts by mass: 20 to 40 parts of modified polysiloxane, 40 to 70 parts of polyurethane emulsion, 5 to 10 parts of flame retardant, 2 to 5 parts of cosolvent, 2.5 to 8 parts of auxiliary agent, 1 to 3 parts of color paste and 20 to 50 parts of solvent, wherein the modified polysiloxane is obtained by reacting antimony oxide, a silane coupling agent, vinyl POSS (Polyhedral Oligomeric Silsesquioxane), a cross-linking agent and methacryloyloxypropyl double-terminated polydimethylsiloxane. According to the present invention, the product can be endowed with the strong flame retardant property, the compatibility among the components is improved, the stability, the corrosion resistance and the weather resistance of the coating are significantly improved, and the coating can be used for a long time, can be widely used in the fields of water resistance, building, art coatings and the like, solves the problems in the prior art, and has good application prospects. Good application prospects are realized.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and particularly relates to an anti-corrosion and flame-retardant multi-effect upgraded full-scenario high-performance coating composition and its application. Background Art

[0002] Polyurethane materials have become one of the common components of environmentally friendly waterproof and anti-corrosion coatings due to their excellent flexibility, adhesion and chemical resistance. The urethane bond in the polyurethane molecular structure endows the coating with good mechanical strength and weather resistance, and at the same time, the aqueous system reduces VOC emissions. By introducing modifications such as epoxy and acrylic or adding corrosion inhibitors, the anti-corrosion performance can be further improved, which is suitable for substrates such as metals and woods and has been widely used in many fields.

[0003] Flame-retardant anti-corrosion coatings are multi-functional coatings that combine fire prevention and anti-corrosion functions. The technical core lies in the synergistic effect of flame retardants and anti-corrosion components. Existing coating products delay the fire by adding halogen-based, phosphorus-based, nitrogen-based and other flame retardant components through the carbon layer isolation or gas-phase flame retardant mechanism, while epoxy resins and polyurethane-based anti-corrosion components delay the corrosion of the substrate through shielding the corrosive medium or electrochemical protection.

[0004] However, in the research and application of flame-retardant anti-corrosion coatings, the poor dispersibility and compatibility between flame retardants and matrix resins are still key problems to be solved urgently. Due to the large polarity difference between flame retardants and organic resins, agglomeration or phase separation is likely to occur, resulting in a decrease in the film-forming property of the coating and poor coating uniformity. This not only affects the mechanical properties and adhesion of the coating, but also weakens the flame retardant efficiency and anti-corrosion performance due to the incomplete carbon layer and increased porosity.

[0005] Therefore, how to optimize and improve the compatibility between flame retardants and resins, achieve better flame retardancy and anti-corrosion performance, while enhancing the adhesion and durability of the coating, and improving the comprehensive performance of flame-retardant anti-corrosion coatings to meet the performance requirements in different fields is the current research focus in this field.

[0006] In summary, there is an urgent need to develop a new technical solution to solve the deficiencies in the existing technology. Summary of the Invention

[0007] The anti-corrosion and flame-retardant multi-effect upgraded full-scenario high-performance coating composition provided by the present invention reacts antimony trioxide (Sb2O3), vinyl POSS (polyhedral oligomeric silsesquioxane) and polysiloxane to obtain modified polysiloxane, and then compound it with polyurethane emulsion, flame retardant and other components. It can not only endow the product with stronger flame retardant performance, but also improve the compatibility between components, and the stability, corrosion resistance and weather resistance of the coating are also significantly improved, which can be used more durably and for a long time. It can be widely applied to many fields such as waterproofing, construction, and artistic coatings, solving the problems in the existing technology and having good application prospects.

[0008] An object of the present invention is to provide an anti-corrosion, flame-retardant, multi-effect upgraded, high-performance coating composition for all scenarios. The anti-corrosion, flame-retardant, multi-effect upgraded, high-performance coating composition comprises components in the following parts by mass:

[0009]

[0010] Among them,

[0011] The modified polysiloxane is obtained by reacting antimony oxide, silane coupling agent, vinyl POSS, cross-linking agent and methacryloxypropyl double-ended polydimethylsiloxane.

[0012] Further, the silane coupling agent is KH570.

[0013] Further, the vinyl POSS is octavinyl-POSS.

[0014] Further, the cross-linking agent is trimethylolpropane trimethacrylate.

[0015] Further, the auxiliary agent is selected from one or more of an emulsifier, a defoaming agent, a leveling agent, a thickening agent and a pH regulator.

[0016] Another object of the present invention is to provide a preparation method of the above-mentioned anti-corrosion, flame-retardant, multi-effect upgraded, high-performance coating composition for all scenarios. The preparation method of the anti-corrosion, flame-retardant, multi-effect upgraded, high-performance coating composition for all scenarios comprises the following steps:

[0017] S1. Mix antimony oxide and silane coupling agent, heat and react, then add an initiator and methacryloxypropyl double-ended polydimethylsiloxane, and continue to react to obtain an intermediate product;

[0018] S2. Mix vinyl POSS, cross-linking agent, initiator and the intermediate product, heat and react to obtain a modified polysiloxane;

[0019] S3. Mix the modified polysiloxane with polyurethane emulsion, flame retardant, cosolvent, auxiliary agent, color paste and deionized water, and stir evenly to obtain the anti-corrosion, flame-retardant, multi-effect upgraded, high-performance coating composition for all scenarios.

[0020] Further, the mass ratio of antimony oxide to methacryloxypropyl double-ended polydimethylsiloxane is 1:(5-10).

[0021] Further, the mass ratio of vinyl POSS to the intermediate product is 1:(3-5).

[0022] Further, in step S1, the temperature of the heating reaction is 60-120 °C.

[0023] Further, in step S2, the temperature of the heating reaction is 60 - 90 °C.

[0024] The present invention has the following beneficial effects:

[0025] The anti-corrosion, flame-retardant, multi-effect upgraded, full-scenario high-performance coating composition of the present invention is compounded with components such as modified polysiloxane, polyurethane emulsion, and flame retardant. Among them, the modified polysiloxane first mixes and reacts the environmentally friendly flame retardant antimony oxide with the silane coupling agent KH570 to introduce carbon-carbon double bonds, and then mixes and reacts with methacryloxypropyl double-terminated polydimethylsiloxane to obtain an intermediate product, introducing a polysiloxane structure on the surface of the inorganic flame retardant. Finally, with vinyl POSS as the core, it reacts with the multi-functional cross-linking agent trimethylolpropane trimethacrylate and the intermediate product to obtain a product with a network branched structure. On the one hand, this component has an organosilicon segment, which not only improves the compatibility with the polyurethane matrix and promotes the more uniform dispersion of antimony oxide in the composition, but also the polysiloxane segment helps to improve the heat resistance and film-forming performance of the coating, thus realizing the improvement of the corrosion resistance of the coating. On the other hand, POSS has a cage-shaped three-dimensional structure, which can improve the stability and strength of the product, and in combustion, POSS can achieve a flame-retardant effect by forming a carbon layer. The present invention further combines POSS with antimony oxide, enabling the two to synergistically form a denser carbon layer, efficiently exerting the covering and isolating effects, inhibiting the contact between oxygen and combustibles. In addition, antimony oxide can further slow down and terminate combustion with the halogen-based flame retardant through a gas-phase barrier effect, thereby realizing an excellent flame-retardant function.

[0026] The anti-corrosion, flame-retardant, multi-effect upgraded, full-scenario high-performance coating composition of the present invention has achieved extremely strong performance far exceeding the prior art in various tests, can operate efficiently for a long time, meets the performance requirements of national standards, has significantly enhanced corrosion resistance and flame-retardant effects, and can stably exert a three-dimensional protection function in different extreme environments. It is applicable to full-scenario fields such as chemical industry, electric power, shipbuilding, construction, and transportation, and can effectively protect the lives and property of users, with good application prospects. Specific Embodiments

[0027] In order to more clearly illustrate the technical solution of the present invention, the following examples are listed. The raw materials, reactions, and post-treatment means appearing in the examples are all common raw materials on the market and technical means well-known to those skilled in the art, unless otherwise specified.

[0028] The terms "preferred", "preferably", "more preferred", etc. in the present invention refer to embodiments of the present invention that can provide certain beneficial effects in certain cases. However, in the same cases or other cases, other embodiments may also be preferred. In addition, the description of one or more preferred embodiments does not imply that other embodiments are not available, nor is it intended to exclude other embodiments from the scope of the present invention.

[0029] It should be understood that, except in any operating example or otherwise indicated, all numbers representing the amounts of ingredients used in the specification and claims, for example, should be understood to be modified by the term "about" in all cases. Therefore, unless otherwise indicated, the numerical parameters set forth in the following specification and appended claims are approximations that vary depending on the desired properties to be obtained by the present invention.

[0030] In the examples of the present invention, the molecular weight of methacryloxypropyl double-capped polydimethylsiloxane is 8000 - 12000, and it is purchased from Aladdin.

[0031] In the examples of the present invention, the vinyl POSS is octavinyl POSS, and it is purchased from Aladdin.

[0032] In the examples of the present invention, the polyurethane emulsion is Lacper 4219, purchased from Wanhua Chemical; the flame retardant is decabromodiphenyl ether; the co-solvent is dipropylene glycol methyl ether; the emulsifier is OP-10, purchased from Aladdin; the defoamer is Tego-805, purchased from Evonik Industries; the leveling agent is Tego-410, purchased from Evonik Industries; the thickener is U604, purchased from Wanhua Chemical; the color paste is a water-based color paste, purchased from Caizhihong.

[0033] In the comparative examples of the present invention, the polydimethylsiloxane is purchased from Aladdin, and its viscosity is 0.65 cSt.

[0034] In the examples of the present invention, "parts" all refer to parts by mass.

[0035] Example 1

[0036] An anti-corrosion and flame-retardant multi-effect upgraded full-scenario high-performance coating composition, the anti-corrosion and flame-retardant multi-effect upgraded full-scenario high-performance coating composition comprises the following components in parts by mass:

[0037]

[0038] The preparation method of the anti-corrosion and flame-retardant multi-effect upgraded full-scenario high-performance coating composition comprises the following steps:

[0039] S1. Using a mixed solution of ethanol and water with a volume ratio of 9:1 as the solvent, adding antimony oxide and KH570 with a mass ratio of 5:1, stirring and reacting at 70 °C for 3 h, then filtering and drying to obtain a solid product;

[0040] Then, using toluene as a solvent, mix the solid product, benzoyl peroxide, and methacryloxypropyl-terminated polydimethylsiloxane in a mass ratio of 1:0.2:10, reflux and react at 110 °C for 4 h under a nitrogen atmosphere, filter and dry to obtain an intermediate product;

[0041] S2. Using toluene as a solvent, mix vinyl POSS, trimethylolpropane trimethacrylate, benzoyl peroxide, and the intermediate product in a mass ratio of 6:3:1:20, react at 80 °C for 12 h under a nitrogen atmosphere, filter and dry to obtain a modified polysiloxane;

[0042] S3. According to the above mass parts, mix the modified polysiloxane with polyurethane emulsion, flame retardant, co-solvent, auxiliary agent, color paste, and deionized water, and stir evenly to obtain the anti-corrosion and flame-retardant multi-effect upgraded full-scenario high-performance coating composition.

[0043] Example 2

[0044] An anti-corrosion and flame-retardant multi-effect upgraded full-scenario high-performance coating composition, the anti-corrosion and flame-retardant multi-effect upgraded full-scenario high-performance coating composition includes the following components in mass parts:

[0045]

[0046]

[0047] The preparation method of the anti-corrosion and flame-retardant multi-effect upgraded full-scenario high-performance coating composition includes the following steps:

[0048] S1. Using a mixed solution of ethanol and water with a volume ratio of 9:1 as a solvent, add antimony oxide and KH570 in a mass ratio of 5:1, stir and react at 70 °C for 3 h, filter and dry to obtain a solid product;

[0049] Then, using toluene as a solvent, mix the solid product, benzoyl peroxide, and methacryloxypropyl-terminated polydimethylsiloxane in a mass ratio of 1:0.2:10, reflux and react at 110 °C for 4 h under a nitrogen atmosphere, filter and dry to obtain an intermediate product;

[0050] S2. Using toluene as a solvent, mix vinyl POSS, trimethylolpropane trimethacrylate, benzoyl peroxide, and the intermediate product in a mass ratio of 6:3:1:20, react at 80 °C for 12 h under a nitrogen atmosphere, filter and dry to obtain a modified polysiloxane;

[0051] S3. According to the above mass parts, mix the modified polysiloxane with polyurethane emulsion, flame retardant, co-solvent, auxiliary agent, color paste, and deionized water, and stir evenly to obtain the anti-corrosion and flame-retardant multi-effect upgraded full-scenario high-performance coating composition.

[0052] Example 3

[0053] An anti-corrosion, flame-retardant, multi-effect upgraded, full-scenario high-performance coating composition, and the anti-corrosion, flame-retardant, multi-effect upgraded, full-scenario high-performance coating composition comprises components in the following mass parts:

[0054]

[0055]

[0056] The preparation method of the anti-corrosion, flame-retardant, multi-effect upgraded, full-scenario high-performance coating composition comprises the following steps:

[0057] S1. Using a mixed solution of ethanol and water with a volume ratio of 9:1 as a solvent, adding antimony oxide and KH570 with a mass ratio of 5:1, stirring and reacting at 70 °C for 3 h, filtering and drying to obtain a solid product;

[0058] Then, using toluene as a solvent, mixing the solid product, dibenzoyl peroxide, and methacryloxypropyl-terminated polydimethylsiloxane with a mass ratio of 1:0.2:10, refluxing and reacting at 110 °C for 4 h under a nitrogen atmosphere, filtering and drying to obtain an intermediate product;

[0059] S2. Using toluene as a solvent, mixing vinyl POSS, trimethylolpropane trimethacrylate, dibenzoyl peroxide, and the intermediate product with a mass ratio of 6:3:1:20, reacting at 80 °C for 12 h under a nitrogen atmosphere, filtering and drying to obtain a modified polysiloxane;

[0060] S3. According to the above mass parts, mixing the modified polysiloxane with a polyurethane emulsion, a flame retardant, a co-solvent, an auxiliary agent, a color paste, and deionized water, and stirring evenly to obtain the anti-corrosion, flame-retardant, multi-effect upgraded, full-scenario high-performance coating composition.

[0061] Comparative Example

[0062] An anti-corrosion, flame-retardant, multi-effect upgraded, full-scenario high-performance coating composition, the difference between this comparative example and Example 1 is that steps S1 and S2 are modified to:

[0063] Using a mixed solution of ethanol and water with a volume ratio of 9:1 as a solvent, adding antimony oxide and KH570 with a mass ratio of 5:1, stirring and reacting at 70 °C for 3 h, filtering and drying to obtain a solid product;

[0064] Mixing the solid product, polydimethylsiloxane, and octamethyl POSS with a mass ratio of 1:2:1, and stirring evenly to obtain a modified polysiloxane;

[0065] Other components and the preparation method are the same as those in Example 1.

[0066] Test Example

[0067] Performance tests were carried out on the coating composition samples prepared in the examples and comparative examples.

[0068] Test method:

[0069] Acid and alkali resistance: GB / T 9274-1988; Salt spray resistance: GB / T 1771-1991; Flame retardancy: GB 12441-2005.

[0070] The test results are shown in Table 1.

[0071] Table 1 Comparison table of performance test results of samples in Examples 1-3 and Comparative Examples 1-3

[0072]

[0073]

[0074] It can be seen from the above experimental data that the coating composition prepared in the examples of the present invention not only has good stability, excellent acid and alkali resistance and salt spray resistance, but also has strong flame retardancy, and the flame resistance time can reach 34 min. In the comparative example where the modified polysiloxane is replaced, substances such as POSS and antimony oxide are only physically mixed, which not only affects the compatibility between components, resulting in problems such as uneven distribution and reduced stability of the coating, insufficient alkali resistance and salt spray resistance, but also it is difficult for the flame retardant substances to form a synergistic effect, and the flame resistance time is significantly reduced.

[0075] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present invention.

[0076] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An anti-corrosion, flame-retardant, multi-effect upgraded, high-performance coating composition for all scenarios, characterized in that, The anti-corrosion, flame-retardant, multi-effect upgraded, high-performance coating composition includes the following components in parts by mass: Among them, The modified polysiloxane is obtained by reacting antimony oxide, silane coupling agent, vinyl POSS, cross-linking agent and methacryloxypropyl double-capped polydimethylsiloxane.

2. The anti-corrosion, flame-retardant, multi-effect upgraded all-scenario high-performance coating composition according to claim 1, wherein The silane coupling agent is KH570.

3. The anti-corrosion and flame-retardant multi-effect upgraded all-scenario high-performance coating composition according to claim 1, characterized in that, The cross-linking agent is trimethylolpropane trimethacrylate.

4. The anti-corrosion and flame-retardant multi-effect upgraded full-scenario high-performance coating composition according to claim 1, wherein The auxiliary agent is selected from one or more of emulsifier, defoamer, leveling agent, thickener and pH regulator.

5. The preparation method of the anti-corrosion, flame-retardant, multi-effect upgraded, full-scenario high-performance coating composition according to any one of claims 1-4, characterized in that, The preparation method of the anti-corrosion, flame-retardant, multi-effect upgraded, high-performance coating composition includes the following steps: S1. Mix antimony oxide and silane coupling agent, after heating and reacting, add initiator and methacryloxypropyl double-capped polydimethylsiloxane, and continue reacting to obtain an intermediate product; S2. Mix vinyl POSS, cross-linking agent, initiator and the intermediate product, and obtain modified polysiloxane after heating and reacting; S3. Mix the modified polysiloxane with polyurethane emulsion, flame retardant, co-solvent, auxiliary agent, color paste and deionized water, and stir evenly to obtain the anti-corrosion, flame-retardant, multi-effect upgraded, high-performance coating composition.

6. The preparation method of the anti-corrosion, flame-retardant and multi-effect upgraded full-scenario high-performance coating composition according to claim 5, characterized in that, The mass ratio of antimony oxide to methacryloxypropyl double-capped polydimethylsiloxane is 1:(5-10).

7. The preparation method of the anti-corrosion, flame-retardant and multi-functional upgraded all-scenario high-performance coating composition according to claim 5, characterized in that, The mass ratio of vinyl POSS to the intermediate product is 1:(3-5).

8. The preparation method of the anti-corrosion, flame-retardant, multi-effect upgraded all-scenario high-performance coating composition according to claim 5, characterized in that, In step S1, the temperature of the heating reaction is 60-120°C.

9. The preparation method of the anti-corrosion, flame-retardant and multi-functional upgraded all-scenario high-performance coating composition according to claim 5, characterized in that, In step S2, the temperature of the heating reaction is 60-90°C.

Images