High flash point alkyd coating and method for preparing the same

Abstract

The high flash point alkyd paint and the preparation method thereof belong to the field of paint, wherein the high flash point alkyd paint comprises: high flash point alkyd resin, various color environmental protection pigments, precipitated barium sulfate, organic bentonite, dispersing agent, defoaming agent, 8% cobalt octoate drier, 12% zirconium octoate drier, 4% calcium octoate drier, 4% zinc octoate drier, low naphthalene S150 solvent oil, D60 solvent oil, DPM solvent, N, N-dimethyl ethanolamine and methyl ethyl ketone oxime anti-skinning agent. The high flash point alkyd paint has a flash point of more than 60 DEG C (closed), belongs to non-dangerous chemical category, can be stored and transported according to general chemicals, meets the requirements of the recommended national standard GB / T 25251-2010 alkyd resin paint, is convenient to operate, has excellent performance, strictly executes the harmful substance limitation in GB 30981-2020 industrial protective paint, and is safe and environmentally friendly.

Description

Technical Field

[0001] This invention belongs to the field of coatings, specifically relating to a high flash point alkyd coating and its preparation method. Background Technology

[0002] Alkyd coatings have a long history. While their overall performance is generally inferior to that of mainstream polyurethane coatings, alkyd coatings offer high cost-effectiveness, are easy to apply, and have low requirements for the application environment. In domestic applications where decorative and protective requirements are not high, their performance is perfectly adequate, and they are still widely used in the domestic market.

[0003] However, traditional alkyd coatings have relatively low flash points and are classified as hazardous chemicals. With the increasing national requirements for the management of hazardous chemicals, the corresponding production, storage, and transportation conditions have become more stringent. Against this backdrop, high flash point alkyd coatings have emerged.

[0004] Compared to traditional alkyd coatings, the use of high-flash-point solvents results in slower solvent evaporation, affecting physical drying and consequently impacting certain properties such as drying properties, recoatability, and hardness. Existing literature shows that some properties, such as hardness and recoatability, are either not mentioned or do not meet the national standard GB / T25251-2010 recommended for conventional alkyd coatings (alkyd resin coatings). Regarding anti-skinning properties, most literature describes the use of skinning agents, with actual anti-skinning performance only briefly mentioned.

[0005] High flash point alkyd coatings using high flash point solvents that comply with national laws and regulations tend to dry more slowly, affecting some properties. Although some manufacturers use non-compliant solvents, such as dichloromethane, while achieving the required drying performance, this is still a violation of regulations. Developing high flash point alkyd coatings that maintain essentially the same durability and mechanical properties as conventional low flash point alkyd coatings, while meeting national recommended standards GB / T 25251-2010 for alkyd resin coatings in terms of drying time, hardness, and recoatability, while also adhering to or exceeding the limits of hazardous substances in current national mandatory standards (such as GB 30981-2020 limits of hazardous substances in industrial protective coatings), and achieving a good balance between storage stability, anti-skinning properties, and drying performance, presents a significant technical challenge. Summary of the Invention

[0006] The technical problem to be solved by this invention is to provide a high flash point alkyd coating and its preparation method. The high flash point alkyd coating of this invention has the same performance as conventional alkyd coatings and meets the requirements of GB / T 25251-2010 Alkyd Resin Coatings. The limits of hazardous substances are strictly implemented in accordance with or better than the limits of hazardous substances in GB 30981-2020 Industrial Protective Coatings, making it safe and environmentally friendly. Some of its effects, such as no bottoming after 24 hours of recoating and excellent storage properties (no skinning after 30 days of heat storage at 50℃), have not been reported or found in the current published literature and products.

[0007] To solve the above problems, the present invention is achieved through the following technical solution:

[0008] The first objective of this invention is:

[0009] A high flash point alkyd coating is provided, comprising the following components in parts by weight:

[0010] The composition includes: 55-60 parts high flash point alkyd resin, 2-20 parts various environmentally friendly pigments, 5-25 parts precipitated barium sulfate, 0.3-0.6 parts organic bentonite, 0.2-0.5 parts dispersant, 0.1-0.2 parts defoamer, 0.1-0.2 parts 8% cobalt isooctanoate drier, 0.3-1 part 12% zirconium isooctanoate drier, 0.5-1 part 4% calcium isooctanoate drier, 0-0.5 parts 4% zinc isooctanoate drier, 6-12 parts low naphthalene S150 solvent oil, 6-13 parts D60 solvent oil, 0-3 parts DPM solvent, 0-0.5 parts N,N-dimethylethanolamine, and 0.2-0.5 parts anti-skinning agent; total mass parts: 100 parts.

[0011] The anti-skinning agent is methyl ethyl ketone oxime.

[0012] The high flash point alkyd coating of the present invention is further optimized as follows:

[0013] The low-naphthalene S150 solvent oil mentioned above is a product of Jiangsu Hualun Chemical Co., Ltd.

[0014] The D60 solvent oil mentioned above is an isoalkane-based, low-odor, environmentally friendly solvent from ExxonMobil.

[0015] The weight ratio of the low-naphthalene S150 solvent oil to D60 solvent oil is 4:6 to 6:4.

[0016] The high flash point alkyd coating of the present invention is further optimized as follows:

[0017] The N,N-dimethylethanolamine mentioned is a product of Eastman Chemical Company of the United States.

[0018] The high flash point alkyd coating of the present invention is further optimized as follows:

[0019] The high flash point alkyd resin is Changxing Chemical's 1207-70.

[0020] The high flash point alkyd coating of the present invention is further optimized as follows:

[0021] The DPM solvent is dipropylene glycol monomethyl ether from Dow Chemical.

[0022] The high flash point alkyd coating of the present invention is further optimized as follows:

[0023] The anti-skinning agent mentioned is methyl ethyl ketone oxime from Shanghai Liming Chemical Co., Ltd.

[0024] In some pigment systems, the skinning problem can be solved by using methyl ethyl ketone oxime as an anti-skinning agent, while some pigment systems prone to skinning use a synergistic anti-skinning combination of "methyl ethyl ketone oxime + DPM solvent + N,N-dimethylethanolamine" to improve storage stability.

[0025] The high flash point alkyd coating of the present invention is further optimized as follows:

[0026] The 8% cobalt isooctanoate drying agent is Changfeng Chemical's EC-8; and / or

[0027] The 12% zirconium isooctanoate drying agent is Changfeng Chemical's 827-1; and / or

[0028] The 4% calcium isooctanoate drying agent is Changfeng Chemical's 824-2; and / or

[0029] The 4% zinc isooctanoate drying agent mentioned is Changfeng Chemical's 825-4.

[0030] The high flash point alkyd coating of the present invention is further optimized as follows:

[0031] The environmentally friendly pigments described herein are pigments that comply with national mandatory standards;

[0032] The precipitated barium sulfate is a product of Zhejiang Changxing Zhonghong New Materials Co., Ltd.

[0033] The organic bentonite mentioned is BYK Chemical's AF bentonite; and / or

[0034] The dispersant is BYK 108 from BYK Chemicals; and / or

[0035] The defoamer mentioned is BASF Chemical's EFKA-2720.

[0036] The second objective of this invention is:

[0037] A method for preparing the high flash point alkyd coating described above is provided, characterized in that:

[0038] It includes the following production steps:

[0039] S1. Mix a portion of high flash point alkyd resin, a portion of low naphthalene S150 solvent oil and a portion of D60 solvent oil, disperse evenly at high speed, then add organic bentonite, dispersant and defoamer in sequence under medium and low speed stirring, and disperse evenly at high speed. Then add various environmentally friendly pigments and precipitated barium sulfate under medium and low speed stirring, mix evenly and then grind in a sand mill to a fineness of ≤20 microns.

[0040] S2. Add the remaining high flash point alkyd resin, the remaining low naphthalene S150 solvent oil, and the remaining D60 solvent oil in sequence, along with 8% cobalt isooctanoate drier, 12% zirconium isooctanoate drier, 4% calcium isooctanoate drier, 4% zinc isooctanoate drier (required in some paint systems), anti-skinning agent, DPM solvent (required in some paint systems), and N,N-dimethylethanolamine (required in some paint systems), and stir at medium to high speed until homogeneous.

[0041] in:

[0042] 1. Drying system: Most paints can meet the requirements with a drying system of 8% cobalt isooctanoate + 12% zirconium isooctanoate + 5% calcium isooctanoate. Some, such as carbon black and BH-F5RK permanent red paint system, need to be combined with 4% zinc isooctanoate as a drying agent.

[0043] 2. Anti-skinning system: In some paints (such as titanium dioxide and lemon yellow, which are not prone to skinning), only methyl ethyl ketone oxime anti-skinning agent is needed to meet the requirements. In some paints (such as carbon black and phthalocyanine green), DPM solvent needs to be added to the anti-skinning agent. In some paints (such as iron oxide red and iron oxide yellow, which are very prone to skinning), a synergistic anti-skinning combination of "methyl ethyl ketone oxime + DPM solvent + N,N-dimethylethanolamine" is needed to improve stability.

[0044] S3. After the performance test meets the requirements, filter and package.

[0045] The basic idea and formulation concept of the high flash point alkyd coating and its preparation method of the present invention are as follows:

[0046] 1. Regarding resins: Through extensive experimentation, a special high flash point alkyd resin was selected to meet the performance requirements. The selected resins meet the requirements of the national recommended standard GB / T 25251-2010 (alkyd resin coatings) in terms of drying properties, toughness, mechanical properties, and recoatability.

[0047] 2. Regarding pigments and fillers: The pigments used in the paint hues are selected to meet the national mandatory standards for limits on harmful substances and have low oil absorption. The fillers are selected only for precipitated barium sulfate with low oil absorption, high gloss and good anti-settling properties. The optimal addition amount in different paint systems under the premise of high gloss is confirmed through gradient experiments.

[0048] The pigments and fillers selected in this invention are strictly controlled to meet national standards for the limits of harmful substances such as heavy metals, and the addition amount is confirmed under the premise of high gloss.

[0049] 3. Solvent formulation: The solvents selected in this invention are characterized by high flash point and low odor and environmental friendliness. Under these two conditions, different solvent combinations are used to balance viscosity, recoatability, and storage stability. Some paints use high flash point solvents containing hydroxyl groups to improve anti-settling and anti-skinning properties. The ratio of these solvents has been confirmed through experiments. Currently, most related patents provide only general descriptions of solvent selection without specifying the exact ratios.

[0050] 4. The selection of the drier was based on screening existing driers and extensive experimentation. It was designed individually for the pigments used in different paints, resulting in the optimal and most synergistic combination found in this invention. This combination maximizes the balance between gloss, reflectivity, and post-storage drying properties while satisfying drying and recoatability requirements. It differs from the generalized descriptions found in existing literature.

[0051] 5. Regarding anti-skinning properties, in paint systems, some paints use anti-skinning agents to meet the anti-skinning requirements. For some paint systems that are prone to skinning, a combination of "anti-skinning agent + alcohol solvent + DMEA" is used to improve the anti-skinning performance. Currently, there are no relevant literature reports.

[0052] in:

[0053] Resin: The base, providing the main basic properties. The resin selected in this invention has a flash point greater than 60°C, and its drying and recoating properties meet relevant standards.

[0054] The selection and amount of pigments and fillers: affect gloss, recoatability, and drying time. Generally, the more pigments and fillers, the better the recoatability, but the gloss will be significantly reduced. The optimal amount of pigments and fillers needs to be determined while ensuring gloss. Different pigments require different combinations of driers and anti-skinning agents.

[0055] Regarding solvents: the stronger the dissolving power, the lower the viscosity, the better the storage stability, and the better the workability, but the recoatability is significantly worse. The weaker the solvent, the better the recoatability, but other aspects are reduced. A balance needs to be found.

[0056] Regarding driers: fine-tuning the combination according to each color is necessary to achieve the best results. For example, inorganic titanium dioxide has less drying loss after storage, so the amount of cobalt and zirconium driers can be reduced accordingly, while maintaining a certain amount of calcium driers, which provides both good gloss and good recoatability.

[0057] Organic pigments, such as black, suffer significant drying loss after storage. However, adding too much drier affects sharpness and gloss, while adding too little results in poor recoatability. A solution is to control the cobalt drier dosage (surface dryness), increase the zirconium drier dosage (complete dryness), and simultaneously combine calcium drier (for post-storage drying) and zinc drier (for open time).

[0058] In traditional low flash point alkyd systems, because they dry quickly and have good recoatability, the selection of solvents and driers does not need to be too precise. In most of the published literature on traditional low flash point alkyd coatings, these two aspects are mostly general.

[0059] Regarding anti-skinning properties: For some paints, adding the anti-skinning agent methyl ethyl ketone oxime can solve the problem. Even with the addition of large amounts of anti-skinning agents and a significant reduction in driers (while meeting minimum drying requirements), anti-skinning properties are still improved in other paint systems. Adding high-flash-point alcohol solvents and DEMA (N,N-dimethylethanolamine) significantly improves these properties. The combination of these two agents and the anti-skinning agent works synergistically. In the iron oxide yellow system, which is relatively prone to skinning, no skinning occurred after 30 days of heat storage at 50°C, during which the container was opened three times. This method has been extended to some paint systems, significantly improving storage stability.

[0060] Methyl ethyl ketone oxime is commonly used as an anti-skinning agent mainly for the following reasons: 1. It captures free radicals, is oxidized, and prevents the reaction from proceeding; 2. It is a strong solvent; 3. It complexes with drying agents.

[0061] The role of alcohol solvents is presumably to enhance overall solubility and wettability as co-solvents. Their anti-skinning effect slightly improves overall skin formation. N,N-dimethylethanolamine is widely used as a neutralizing agent in waterborne alkyd coatings to improve resin water solubility and increase pH value to enhance flash rust resistance. However, its application in oil-based alkyd coatings is rare, and its anti-skinning effect has not been reported, suggesting a more complex mechanism.

[0062] 1. It can react chemically with the hydroxyl groups of alkyd resin, indirectly improving its anti-skinning properties;

[0063] 2. It may combine with acidic driers, slowing down their release, while the partial evaporation from the paint film after coating does not affect drying performance. In actual tests, N,N-dimethylethanolamine, in addition to slowing down skinning, also has a slight effect on promoting drying.

[0064] The synergistic effect of the combination of "methyl ethyl ketone oxime anti-skinning agent + alcohol solvent + N,N-dimethylethanolamine" significantly improves the anti-skinning properties of certain paint systems, but no relevant literature or patent reports have been found. Its effects are illustrated in the table below:

[0065]

[0066] The experimental results show that in some paint systems that are prone to skinning during storage, simply increasing the amount of methyl ethyl ketone oxime anti-skinning agent cannot improve the anti-skinning performance. However, adding a small amount of alcohol solvent can improve the performance to some extent. The combination of "methyl ethyl ketone oxime anti-skinning agent + alcohol solvent + N,N-dimethylethanolamine" can significantly improve the anti-skinning property and thus improve the storage stability.

[0067] This invention, through overall scientific formulation design and innovative combinations of local components (such as specific solvent and drier ratios, and solutions for anti-skinning in some paint systems), achieves a high-performance high-flash-point alkyd coating with a flash point greater than 60°C. Classified as a non-hazardous chemical, it can be stored and transported as a general chemical. It exhibits high gloss, excellent surface finish, and its mechanical properties, durability, and drying properties all meet the requirements of the traditional alkyd coating recommendation standard GB / T25251-2010, Alkyd Resin Coatings. It also demonstrates excellent storage properties (no skinning after 30 days of heat storage at 50°C), solving the current problem of undercoating peeling after 24 hours with high-flash-point alkyd coatings; simultaneously, the limits for hazardous substances meet the requirements of GB 30981-2020, Industrial Protective Coatings. Detailed Implementation

[0068] To make the application, technical solution, and advantages of this invention clearer, the invention is described in detail with reference to specific embodiments. It should be understood that the embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this invention. Any simple improvements to the preparation method of this invention based on the inventive concept fall within the scope of protection of this invention.

[0069] Examples 1-4: A high flash point alkyd coating and its preparation method

[0070] A high flash point alkyd coating comprises the following components in parts by weight:

[0071] The composition includes: 55-60 parts high flash point alkyd resin, 2-20 parts various environmentally friendly pigments, 5-25 parts precipitated barium sulfate, 0.3-0.6 parts organic bentonite, 0.2-0.5 parts dispersant, 0.1-0.2 parts defoamer, 0.1-0.2 parts 8% cobalt isooctanoate drier, 0.3-1 part 12% zirconium isooctanoate drier, 0.5-1 part 4% calcium isooctanoate drier, 0-0.5 parts 4% zinc isooctanoate drier, 6-12 parts low naphthalene S150 solvent oil, 6-13 parts D60 solvent oil, 0-3 parts DPM solvent, 0-0.5 parts N,N-dimethylethanolamine, and 0.2-0.5 parts anti-skinning agent; total mass parts: 100 parts.

[0072] The anti-skinning agent is methyl ethyl ketone oxime.

[0073] The low-naphthalene S150 solvent oil mentioned above is a product of Jiangsu Hualun Chemical Co., Ltd.

[0074] The D60 solvent oil mentioned above is an isoalkane-based, low-odor, environmentally friendly solvent from ExxonMobil.

[0075] The weight ratio of the low-naphthalene S150 solvent oil to D60 solvent oil is 4:6 to 6:4.

[0076] The N,N-dimethylethanolamine mentioned is a product of Eastman Chemical Company of the United States.

[0077] The DPM solvent is dipropylene glycol monomethyl ether from Dow Chemical.

[0078] The DPM solvent and N,N-dimethylethanolamine are added only in some paint systems.

[0079] The high flash point alkyd resin is Changxing Chemical's 1207-70.

[0080] The 8% cobalt isooctanoate drying agent is EC-8 from Changfeng Chemical.

[0081] The 12% zirconium isooctanoate drying agent mentioned is Changfeng Chemical's 827-1;

[0082] The 4% calcium isooctanoate drying agent mentioned is Changfeng Chemical's 824-2;

[0083] The 4% zinc isooctanoate drying agent mentioned is Changfeng Chemical's 825-4, which is added to some colored paints.

[0084] The environmentally friendly pigments described herein are pigments that comply with national mandatory standards;

[0085] The precipitated barium sulfate is a product of Zhejiang Changxing Zhonghong New Materials Co., Ltd.

[0086] The organic bentonite mentioned is BYK Chemical's AF bentonite;

[0087] The dispersant mentioned is BYK108 from BYK Chemicals;

[0088] The defoamer mentioned is BASF Chemical's EFKA-2720.

[0089] It includes the following production steps:

[0090] S1. Mix a portion of high flash point alkyd resin, a portion of low naphthalene S150 solvent oil and a portion of D60 solvent oil, disperse evenly at high speed, then add organic bentonite, dispersant and defoamer in sequence under medium and low speed stirring, and disperse evenly at high speed. Then add various environmentally friendly pigments and precipitated barium sulfate under medium and low speed stirring, mix evenly and then grind in a sand mill to a fineness of ≤20 microns.

[0091] S2. Add the remaining high flash point alkyd resin, the remaining low naphthalene S150 solvent oil, and the remaining D60 solvent oil in sequence, along with 8% cobalt isooctanoate drier, 12% zirconium isooctanoate drier, 4% calcium isooctanoate drier, 4% zinc isooctanoate drier (required in some paint systems), anti-skinning agent, DPM solvent (required in some paint systems), and N,N-dimethylethanolamine (required in some paint systems), and stir at medium to high speed until homogeneous.

[0092] in:

[0093] 1. Drying system: Most paints can meet the requirements with a drying system of 8% cobalt isooctanoate + 12% zirconium isooctanoate + 5% calcium isooctanoate. Some paint systems, such as carbon black and BH-F5RK permanent red, require the addition of 4% zinc isooctanoate as a drying agent.

[0094] 2. Anti-skinning system: In some paints (such as titanium dioxide and lemon yellow, which are not prone to skinning), only methyl ethyl ketone oxime anti-skinning agent is needed to meet the requirements. In some paints (such as carbon black and phthalocyanine green), DPM solvent needs to be added to the anti-skinning agent. In some paints (such as iron oxide red and iron oxide yellow, which are very prone to skinning), a synergistic anti-skinning combination of "methyl ethyl ketone oxime + DPM solvent + N,N-dimethylethanolamine" is needed to improve stability.

[0095] S3. After the performance test meets the requirements, filter and package.

[0096] Table 1. Composition of various embodiments of the present invention (parts by weight)

[0097]

[0098]

[0099] Table 2 Performance table of various embodiments of the present invention

[0100]

[0101]

[0102] Based on the performance of the embodiments in the table above, this invention is a high flash point alkyd coating with a flash point greater than 60℃, achieving the predetermined target. Its performance meets or partially exceeds the requirements of the recommended standard GB / T 25251-2010 (Alkyd Resin Coatings). The overall hazardous substance limits strictly comply with and exceed the requirements of GB 30981-2020 (Hazardous Substance Limits in Industrial Protective Coatings). It exhibits a high-gloss surface effect, excellent storage stability (no skinning at 50℃ for 30 days), exceeding the GB / T 25251-2010 standard (no skinning at 50℃ for 48 hours). Its recoatability meets the GB / T 25251-2010 standard (currently, no related patented products or competing products on the market meet this performance requirement). It solves the problem of poor drying properties and easy undercoating after 24 hours when recoating with known high flash point alkyd coating patented products or common competing products on the market.

[0103] In summary, the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any changes, modifications, and evolutions made by those skilled in the art without departing from the scope of the present invention based on the disclosed technical content shall be considered equivalent embodiments of the present invention. Furthermore, any changes, modifications, and evolutions made to the above embodiments based on the essential technology of the present invention shall still fall within the protection scope of the present invention.

[0104] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0105] Experimental methods not specified in this invention are generally performed under conventional conditions or as recommended by the manufacturer.

[0106] Unless otherwise stated, the various optimized technical solutions in this invention can be combined with each other.

[0107] Unless otherwise stated, percentages and parts are weight percentages and weight parts.

[0108] Experimental methods not specified in the instructions and examples are generally performed under standard conditions or as recommended by the manufacturer.

[0109] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as are familiar to those skilled in the art. Furthermore, any methods and materials similar to or equivalent to those described herein may be used in the methods of this invention.

Claims

1. A high flash point alkyd coating, characterized in that: It comprises the following components by mass: The composition includes: 55-60 parts high flash point alkyd resin, 2-20 parts various environmentally friendly pigments, 5-25 parts precipitated barium sulfate, 0.3-0.6 parts organic bentonite, 0.2-0.5 parts dispersant, 0.1-0.2 parts defoamer, 0.1-0.2 parts 8% cobalt isooctanoate drier, 0.3-1 parts 12% zirconium isooctanoate drier, 0.5-1 parts 4% calcium isooctanoate drier, 0-0.5 parts 4% zinc isooctanoate drier, 6-12 parts low naphthalene S150 solvent oil, 6-13 parts D60 solvent oil, 0-3 parts DPM solvent, 0-0.5 parts N,N-dimethylethanolamine, and 0.2-0.5 parts anti-skinning agent; the total mass is 100 parts; the DPM solvent and N,N-dimethylethanolamine are not both 0 parts. The anti-skinning agent is methyl ethyl ketone oxime.

2. The high flash point alkyd coating according to claim 1, characterized in that: The low-naphthalene S150 solvent oil mentioned above is a product of Jiangsu Hualun Chemical Co., Ltd. The D60 solvent oil mentioned above is an isoalkane-based, low-odor, environmentally friendly solvent from ExxonMobil. The weight ratio of the low-naphthalene S150 solvent oil to D60 solvent oil is 4:6 to 6:

4.

3. The high flash point alkyd coating according to claim 1, characterized in that: The N,N-dimethylethanolamine mentioned is a product of Eastman Chemical Company of the United States.

4. The high flash point alkyd coating according to claim 1, characterized in that: The high flash point alkyd resin is Changxing Chemical's 1207-70.

5. The high flash point alkyd coating according to claim 1, characterized in that: The DPM solvent is dipropylene glycol monomethyl ether from Dow Chemical.

6. The high flash point alkyd coating according to claim 1, characterized in that: The anti-skinning agent mentioned is methyl ethyl ketone oxime from Shanghai Liming Chemical Co., Ltd.

7. The high flash point alkyd coating according to claim 1, characterized in that: The 8% cobalt isooctanoate drying agent is Changfeng Chemical's EC-8; and / or The 12% zirconium isooctanoate drying agent is Changfeng Chemical's 827-1; and / or The 4% calcium isooctanoate drying agent is Changfeng Chemical's 824-2; and / or The 4% zinc isooctanoate drying agent mentioned is Changfeng Chemical's 825-4.

8. The high flash point alkyd coating according to claim 1, characterized in that: The environmentally friendly pigments described herein are pigments that comply with national mandatory standards; The precipitated barium sulfate is a product of Zhejiang Changxing Zhonghong New Materials Co., Ltd. The organic bentonite mentioned is BYK Chemical's AF bentonite; and / or The dispersant is BYK 108 from BYK Chemicals; and / or The defoamer mentioned is BASF Chemical's EFKA-2720.

9. A method for preparing a high flash point alkyd coating according to claim 1, characterized in that: It includes the following production steps: S1. Mix a portion of high flash point alkyd resin, a portion of low naphthalene S150 solvent oil and a portion of D60 solvent oil, disperse evenly at high speed, then add organic bentonite, dispersant and defoamer in sequence under medium and low speed stirring, and disperse evenly at high speed. Then add various environmentally friendly pigments and precipitated barium sulfate under medium and low speed stirring, mix evenly and then grind in a sand mill to a fineness of ≤20 microns. S2. Add the remaining high flash point alkyd resin, the remaining low naphthalene S150 solvent oil and the remaining D60 solvent oil in sequence, 8% cobalt isooctanoate drier, 12% zirconium isooctanoate drier, 4% calcium isooctanoate drier, 4% zinc isooctanoate drier, anti-skinning agent, DPM solvent, and N,N dimethyl ethanolamine, and stir at medium to high speed until homogeneous. S3. After the performance test meets the requirements, filter and package.

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