High-flash-point alkyd resin, alkyd antirust paint composition, and related products, preparation method and application thereof

Abstract

The invention provides a high-flash-point alkyd resin, an alkyd antirust paint composition as well as related products, a preparation method and application thereof, and belongs to the technical field of antirust paint. The high-flash-point alkyd resin disclosed by the invention is prepared from the following raw materials in parts by weight: 130 to 150 parts of polyol, 50 to 100 parts of enzymolysis cottonseed oil, 200 to 300 parts of oleic acid, 200 to 280 parts of hyodeoxycholic acid, 210 to 230 parts of phthalic anhydride, 20 to 40 parts of S-1500 # solvent oil, 15 to 30 parts of octadecene and 225 to 255 parts of trimethylbenzene. The high-flash-point alkyd resin provided by the invention can be used for preparing a paint coating which is faster in dryness and better in thick coating effect and anti-rust and anti-corrosion effects.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-rust paints, and relates to a high-flash point alkyd resin, an alkyd anti-rust paint composition and related products, preparation methods and applications thereof. Background Art

[0002] Anti-rust paint is a special coating that can protect the surface of materials from corrosion. Applying anti-rust paint on the surface of materials, especially on the surface of metal materials, can effectively prevent the metal surface from rusting. In addition, in addition to the anti-rust function, anti-rust paint also has the functions of surface coloring and beauty.

[0003] The existing anti-rust paint field often faces the problem of unsatisfactory thick coating effect. Thick coating of paint requires applying a large amount of paint on the surface. At this time, there are two ways of coating, one-time coating and multiple coating. One-time coating refers to adding more paint in the process of a single coating. Since a large amount of paint is often in a fluid state after being applied, the liquid flows downward when the paint is not dry, and a dripping phenomenon is formed after the lower part is dried. After the upper part is dried, an orange peel phenomenon is formed due to the small amount of residual paint. Multiple coating refers to applying a small amount of paint, and then applying it in layers to thicken it after the paint is dry. Since the factors affecting the drying speed of paint are complex, the drying speeds of the paints applied successively are often different, which may cause cracking and other phenomena. In addition to the requirements for the thick coating effect of anti-rust paint, the requirements for the safety (flash point) and environmental protection of paint products are also increasing.

[0004] Chinese invention patent CN116676024A provides a water-based steel structure anti-rust paint and a preparation method thereof. The water-based steel structure anti-rust paint comprises the following components in parts by weight: 350-450 parts of epoxy-modified acrylic emulsion, 50-100 parts of resin, 10-20 parts of anti-flash embroidery auxiliary agent, 345-545 parts of auxiliary agent, and 170-250 parts of water; the resin comprises at least one of epoxy ester resin and alkyd resin.

[0005] Chinese invention patent CN117659835A provides a thick-coating single-component water-based paint, which includes the following components by weight percentage: water-based alkyd resin 14%-19%, drying agent 0.5%-0.6%, amine neutralizer 0.1%-0.2%, environmentally friendly solvent 2%-3%, deionized water 15%-21%, first defoamer 0.1%-0.15%, first batch polyurethane resin 5%-6%, anti-rust filler 30%-40%, pigment 2%-8%, second batch polyurethane resin 1%-4%, water-based acrylic resin 10%-12%, toughening agent 2%-3%, substrate wetting agent 0.1%-0.2%, second defoamer 0.1%-0.15%, thickener 0.5%-1%.

[0006] However, it is difficult to provide a paint coating with faster drying, thick coating effect, and better anti-rust and anti-corrosion effect in the prior art. Summary of the invention

[0007] In view of this, the object of the present invention is to provide a high flash point alkyd resin, an alkyd antirust paint composition and related products, preparation methods and applications thereof.

[0008] To achieve the above-mentioned object of the invention, on the one hand, the present invention provides a high flash point alkyd resin, which is made of the following raw materials in parts by weight:

[0009] 130-150 parts of polyol, 50-100 parts of enzymatically hydrolyzed cottonseed oil, 200-300 parts of oleic acid, 200-280 parts of hyodeoxycholic acid, 210-230 parts of phthalic anhydride, 20-40 parts of S-1500# solvent oil, 15-30 parts of octadecene and 225-255 parts of trimethylbenzene;

[0010] The preparation method of enzymolyzed cottonseed oil comprises the following steps: mixing cottonseed oil and water in a weight ratio of 7-9:1-3, adding lipase and soybean lecithin, maintaining the temperature at 30-50°C for reaction, and obtaining enzymolyzed cottonseed oil.

[0011] Preferably, the polyol is selected from at least one of pentaerythritol, dipentaerythritol and tripentaerythritol.

[0012] Dipentaerythritol, also known as dipentaerythritol, has the following chemical structure:

[0013]

[0014] The chemical structure of tripentaerythritol is shown below:

[0015]

[0016] More preferably, the polyol is a mixture of pentaerythritol and dipentaerythritol.

[0017] More preferably, the polyol is a mixture of pentaerythritol and dipentaerythritol in a weight ratio of 3-4:1.

[0018] Preferably, the weight of the lipase is 0.5%-3% of the weight of the cottonseed oil; the type of the lipase is selected from one or more of porcine pancreatic lipase, plant lipase, and plant phospholipase; the weight of the soybean lecithin is 1%-2% of the weight of the cottonseed oil.

[0019] More preferably, the lipase is porcine pancreatic lipase.

[0020] On the other hand, the present invention provides a method for preparing the high flash point alkyd resin, comprising the following steps:

[0021] The polyol, enzymatically hydrolyzed cottonseed oil, oleic acid, hyodeoxycholic acid, phthalic anhydride, trimethylbenzene and octadecene are mixed, refluxed for esterification, cooled, and S-1500# solvent oil is added for dilution to obtain a high flash point alkyd resin.

[0022] In another aspect, the present invention provides an alkyd antirust paint composition, comprising the following components in parts by weight:

[0023] 25-40 parts of high flash point alkyd resin, 1-25 parts of pigment, 20-40 parts of anti-rust filler and 5-10 parts of solvent;

[0024] Among them, the high flash point alkyd resin is the high flash point alkyd resin mentioned above or the high flash point alkyd resin prepared by the above preparation method; the anti-rust filler contains cerium element; the solvent is selected from at least one of diethylene glycol methyl ether, diethylene glycol ethyl ether, diethylene glycol butyl ether, dipropylene glycol methyl ether, dipropylene glycol butyl ether, ethylene glycol diacetate, dimethyl succinate, dimethyl glutarate, and dimethyl adipate.

[0025] Preferably, the pigment is selected from at least one of white pigment, yellow pigment, black pigment, red pigment, green pigment and blue pigment.

[0026] As an example of the present invention, the pigment is a black pigment, and the weight portion of the pigment is 1-3 parts, more preferably 2 parts.

[0027] As an example of the present invention, the pigment is a white pigment, and the weight portion of the pigment is 10-18 parts, more preferably 14 parts.

[0028] As an example of the present invention, the pigment is a yellow pigment, and the weight portion of the pigment is 12-20 parts, more preferably 16 parts.

[0029] Preferably, the white pigment is titanium dioxide.

[0030] Preferably, the black pigment is carbon black.

[0031] Preferably, the yellow pigment is benzidine yellow G.

[0032] Preferably, the anti-rust filler is selected from one or more of the following substances:

[0033] Nano cerium dioxide, cerium-doped aluminum phosphate, cerium-doped lanthanum phosphate, cerium-doped barium sulfate, and cerium-doped magnesium hydroxide.

[0034] Preferably, the alkyd antirust paint composition comprises, by weight: 30-35 parts of high flash point alkyd resin, 1-20 parts of pigment, 25-35 parts of antirust filler and 6-9 parts of solvent.

[0035] Preferably, the alkyd antirust paint composition further comprises 0.1-1 parts by weight of an auxiliary agent.

[0036] More preferably, the auxiliary agent is selected from one or more of a dispersing auxiliary agent, an adhesion auxiliary agent, a leveling auxiliary agent, a defoaming auxiliary agent, and an anti-settling auxiliary agent.

[0037] In another aspect, the present invention provides an alkyd antirust paint made from the alkyd antirust paint composition.

[0038] In another aspect, the present invention provides a method for preparing the alkyd antirust paint, comprising the following steps:

[0039] The alkyd anti-rust paint is obtained by mixing the high flash point alkyd resin and the solvent in a formula amount, stirring, and adding the pigment and the anti-rust filler.

[0040] On the other hand, the present invention provides the above-mentioned high flash point alkyd resin, the preparation method of the above-mentioned high flash point alkyd resin, the above-mentioned alkyd antirust paint composition, the above-mentioned alkyd antirust paint and the use of the alkyd antirust paint prepared by the above-mentioned preparation method in coatings.

[0041] Preferably, the coating is an anti-rust paint product.

[0042] In the last aspect, the present invention provides a coating, comprising the above-mentioned high flash point alkyd resin, the high flash point alkyd resin obtained by the above-mentioned preparation method, the above-mentioned alkyd antirust paint composition, the above-mentioned alkyd antirust paint, and the alkyd antirust paint obtained by the above-mentioned preparation method.

[0043] Compared with the prior art, the beneficial effects of the present invention include:

[0044] The invention provides a high flash point alkyd resin and a preparation method thereof. The high flash point alkyd resin can be applied to alkyd antirust paint products with different formulations and colors. By adding substances such as enzymolysis cottonseed oil and hyodeoxycholic acid, the alkyd antirust paint product can be dried faster, has a thick coating effect, and has better antirust and anticorrosion effects. DETAILED DESCRIPTION

[0045] Terms and Claims of the Present Invention:

[0046] 1. The articles “a”, “an” and “the” include plural referents unless expressly limited to one or more referents otherwise.

[0047] 2. Numerical range: Unless otherwise expressly indicated, all ranges or ratios disclosed herein will be understood to include any and all sub-ranges or sub-ratios contained therein. For example, a range or ratio of 1 to 30 stated should be considered to be included between a minimum value of 1 and a maximum value of 30, and any sub-range or sub-ratio, integer, decimal, or sub-range or sub-ratio consisting of integers or decimals including the end points.

[0048] The following non-limiting examples can enable those skilled in the art to more fully understand the present invention, but do not limit the present invention in any way. The following content is merely an exemplary description of the scope of the present invention, and those skilled in the art can make various changes and modifications to the present invention based on the disclosed content, which should also fall within the scope of the present invention.

[0049] The present invention is further described below by way of specific examples. The various chemical reagents used in the examples of the present invention are obtained through conventional commercial channels unless otherwise specified. Unless otherwise specified, the contents described below are all weight contents. Unless otherwise specified, it is understood that the process is carried out at room temperature.

[0050] In the following examples, some of the reagents are from the following Table 1:

[0051] Table 1

[0052]

[0053]

[0054] Example 1

[0055] The invention discloses a method for preparing enzymatically hydrolyzed cottonseed oil.

[0056] Method 1:

[0057] Mix 8 parts of cottonseed oil and 2 parts of water, add 0.16 parts of porcine pancreatic lipase (2% of cottonseed oil) and 0.12 parts of soybean lecithin (1.5% of cottonseed oil), stir well for 30 minutes, heat to 36-37°C, react for 12 hours, and the obtained cottonseed oil is recorded as enzymolysis cottonseed oil 1.

[0058] Method 2:

[0059] Mix 9 parts of cottonseed oil and 1 part of water, add 0.27 parts of porcine pancreatic lipase (3% of cottonseed oil) and 0.09 parts of soybean lecithin (1% of cottonseed oil), stir well for 30 minutes, heat to 36-37°C, react for 15 hours, and the obtained cottonseed oil is recorded as enzymolysis cottonseed oil 2.

[0060] Method 3:

[0061] Mix 7 parts of cottonseed oil and 3 parts of water, add 0.035 parts of porcine pancreatic lipase (0.5% of cottonseed oil) and 0.14 parts of soybean lecithin (2% of cottonseed oil), stir well for 30 minutes, heat to 36-37°C, react for 10 hours, and the obtained cottonseed oil is recorded as enzymolysis cottonseed oil 3.

[0062] Example 2

[0063] The invention discloses a method for preparing a rust-proof filler.

[0064] 1. A method for preparing nano-cerium dioxide anti-rust filler.

[0065] Nano-cerium dioxide was prepared by the classic solvothermal method. Cerium (III) nitrate hexahydrate was dissolved in anhydrous ethanol (ratio 1:4 g / mL) to obtain a precursor solution. The precursor solution was placed in a hydrothermal reactor and reacted at 120°C for 24 hours, and then cooled to room temperature with the furnace. Centrifugation, washing, and drying were performed to obtain nano-cerium dioxide antirust filler.

[0066] 2. A method for preparing cerium-doped aluminum phosphate.

[0067] The cerium-doped aluminum phosphate was synthesized by the classic double decomposition reaction method. Aluminum nitrate nonahydrate, cerium (III) nitrate hexahydrate and water were mixed and dissolved (the weight ratio of aluminum nitrate nonahydrate to cerium (III) nitrate hexahydrate was 10:1, and the dosage ratio of cerium (III) nitrate hexahydrate to water was 1g:15mL). The temperature was raised to 60°C, and 2 mol / L phosphoric acid aqueous solution was added dropwise until the precipitation was completely formed, and the reaction was stirred for 1 hour. Filter, wash and dry to obtain cerium-doped aluminum phosphate antirust filler.

[0068] 3. A method for preparing cerium-doped magnesium hydroxide.

[0069] Cerium-doped magnesium hydroxide was synthesized by the classic double decomposition reaction method. A 1 mol / L magnesium chloride aqueous solution was mixed with cerium (III) nitrate hexahydrate at a volume mass ratio of 4:1 mL / g. Ammonia water was added dropwise under stirring at room temperature until the precipitation was completely formed, and the temperature was raised to 50°C and stirred for 1 hour. Filtered, washed until there was no ammonia smell, and dried to obtain cerium-doped magnesium hydroxide anti-rust filler.

[0070] Example 3-Example 7 provides a high flash point alkyd resin, and its raw material formula is shown in Table 2 below (unit: weight parts):

[0071] Table 2

[0072]

[0073] Among them, the enzymolyzed cottonseed oils in the above-mentioned Examples 3, 4 and 5 are respectively the enzymolyzed cottonseed oil 1, enzymolyzed cottonseed oil 2 and enzymolyzed cottonseed oil 3 prepared in Example 1, and the enzymolyzed cottonseed oils in the above-mentioned Examples 6 and 7 are the enzymolyzed cottonseed oil 1 prepared in Example 1. The polyols in the above-mentioned Examples 3 and 4 are a mixture of pentaerythritol and dipentaerythritol in a weight ratio of 3.5:1, the polyols in Example 5 are a mixture of pentaerythritol and dipentaerythritol in a weight ratio of 3:1, the polyols in Example 6 are a mixture of pentaerythritol and dipentaerythritol in a weight ratio of 4:1, and the polyols in Example 7 are a mixture of pentaerythritol, dipentaerythritol and tripentaerythritol in a weight ratio of 1:1:1.

[0074] Comparative Example 1

[0075] Compared with Example 3, the only difference is that the weight parts of each raw material are different.

[0076] 100 parts of polyol, 200 parts of enzymatically hydrolyzed cottonseed oil, 150 parts of oleic acid, 300 parts of hyodeoxycholic acid, 300 parts of phthalic anhydride, 10 parts of trimethylbenzene, 10 parts of octadecene, and 150 parts of S-1500# solvent oil.

[0077] Comparative Example 2

[0078] Compared with Example 3, the only difference is that the enzymatically hydrolyzed cottonseed oil is omitted, 167 parts by weight of polyol is used instead, and 298 parts by weight of oleic acid is used instead, and the rest are the same.

[0079] Compared with Example 3, the only difference is that octadecene is omitted, 33 parts by weight of S-1500# solvent oil is used instead, and 262 parts by weight of trimethylol is used instead, and the rest are the same.

[0080] Comparative Example 4

[0081] Compared with Example 3, the only difference is that hyodeoxycholic acid is omitted and oleic acid is used in an amount of 490 parts by weight, and the rest is the same.

[0082] Comparative Example 5

[0083] Compared with Example 3, the only difference is that the amount of trimethylbenzene is changed to 30 parts and the amount of S1500# solvent oil is changed to 240 parts, and the rest is the same.

[0084] Comparative Example 6

[0085] Compared with Example 3, the only difference is that the enzymatically hydrolyzed cottonseed oil is replaced with an equal weight portion of cottonseed oil, and the rest is the same.

[0086] Comparative Example 7

[0087] Compared with Example 3, the only difference is that hyodeoxycholic acid is replaced by an equal weight of rosin, and the rest is the same.

[0088] Preparation Example

[0089] The preparation method of high flash point alkyd resin comprises the following steps.

[0090] Mix the formulated amount of polyol, enzymatically hydrolyzed cottonseed oil, oleic acid, hyodeoxycholic acid, phthalic anhydride, trimethylbenzene and octadecene. Heat to 200°C and keep for 2 hours under the protection of inert gas (nitrogen), then heat to 220°C and keep for 3 hours to perform reflux esterification reaction. Cool to 200°C and mix with the formulated amount of S-1500# solvent oil to obtain a high flash point alkyd resin.

[0091] According to the raw material formula of high flash point alkyd resin provided in Example 3 to Example 7, Comparative Example 1 and Comparative Example 5, preparation was carried out according to the preparation method of Preparation Example 1, and the obtained high flash point alkyd resins were respectively recorded as alkyd resin 3# to alkyd resin 7#, alkyd resin D1# and alkyd resin D5#.

[0092] The preparation methods of the high flash point alkyd resins provided in Comparative Examples 2 to 4 are different from the above preparation process in that the enzymatic hydrolysis of cottonseed oil / octadecene / hyodeoxycholic acid is omitted in the preparation steps, and the rest are the same. The obtained high flash point alkyd resins are respectively recorded as alkyd resin D2# to alkyd resin D4#.

[0093] The preparation method of the high flash point resin provided in Comparative Example 6 is different from the above preparation process in that the enzymatically hydrolyzed cottonseed oil is replaced with an equal weight of cottonseed oil in the preparation step, and the rest are the same. The obtained high flash point alkyd resin is recorded as alkyd resin D6#.

[0094] The preparation method of the high flash point resin provided in Comparative Example 7 is different from the above preparation process in that hyodeoxycholic acid is replaced by an equal weight of rosin in the preparation steps, and the rest are the same. The obtained high flash point alkyd resin is recorded as alkyd resin D7#.

[0095] Example 8

[0096] A black alkyd anti-rust paint, the raw materials are as follows:

[0097] 30 parts of high flash point alkyd resin, 2 parts of carbon black (pigment), 30 parts of nano cerium dioxide antirust filler prepared in Example 2, and 8 parts of diethylene glycol methyl ether (solvent).

[0098] When the above-mentioned high flash point alkyd resins are alkyd resin 3#-alkyd resin 7# and alkyd resin D1#-alkyd resin D7# provided in the preparation example, the obtained black alkyd anti-rust paints are respectively recorded as black paint 3#-black paint 7# and black paint D1#-black paint D7#.

[0099] Example 9

[0100] A white alkyd anti-rust paint, the raw materials are as follows:

[0101] 25 parts of high flash point alkyd resin, 14 parts of titanium dioxide (pigment), 20 parts of cerium-doped aluminum phosphate antirust filler prepared in Example 2, and 10 parts of diethylene glycol ethyl ether (solvent).

[0102] When the above-mentioned high flash point alkyd resins are alkyd resin 3#-alkyd resin 7# and alkyd resin D1#-alkyd resin D7# provided in the preparation example, the obtained white alkyd anti-rust paints are respectively recorded as white paint 3#-white paint 7# and white paint D1#-white paint D7#.

[0103] Example 10

[0104] A yellow alkyd anti-rust paint, the raw materials are as follows:

[0105] 40 parts of high flash point alkyd resin, 16 parts of benzidine yellow G (pigment), 40 parts of cerium-doped magnesium hydroxide anti-rust filler prepared in Example 2, 5 parts of diethylene glycol ethyl ether (solvent), and 1 part of ZY-261 leveling wetting agent.

[0106] When the above-mentioned high flash point alkyd resins are alkyd resin 3#-alkyd resin 7# and alkyd resin D1#-alkyd resin D7# provided in the preparation example, the obtained yellow alkyd anti-rust paints are respectively recorded as yellow paint 3#-yellow paint 7# and yellow paint D1#-yellow paint D7#.

[0107] The preparation method of the alkyd anti-rust paint of Example 8 to Example 10 is: mix the formula amount of high flash point alkyd resin and solvent, add anti-rust filler (add other additives when there are other additives) during stirring, mix well, and obtain alkyd anti-rust paint.

[0108] Effect evaluation

[0109] 1. Evaluation of drying time.

[0110] The drying time of paint is divided into two types: surface drying time (surface drying) and actual drying time (actual drying). The surface drying time determination method (Method B: finger touch method) and the actual drying time determination method (Method C: blade method) provided in GB / T1728-2020 were used to test the drying time of each group of paints. The results are shown in Table 3 below:

[0111] Table 3

[0112]

[0113] It can be seen that the high flash point alkyd resin provided in the embodiment of the present invention is applied to different paint formulations, and the surface drying time and the actual drying time of the paint are shortened to varying degrees.

[0114] 2. Determination of sag limit.

[0115] When paint is applied on a vertical plane, the paint that has not yet dried on the upper part flows downward and merges with the paint on the lower part to form drops. This phenomenon is called sagging. The sagging phenomenon when the paint is applied thickly seriously affects the appearance of the coating. The higher the sagging limit, the less sagging phenomenon occurs after thick coating, and the better the thick coating effect.

[0116] The evaluation method for the evaluation of the anti-sagging property of paints and varnishes provided in GB / T 9264-2012 was used to test the sagging limit. The experimental results are shown in Table 4 below:

[0117] Table 4

[0118] Group Paint sag limit (μm) Group Paint sag limit (μm) Black paint 3# 580 White paint D2# 450 Black paint 4# 550 White paint D3# 440 Black paint 5# 560 White paint D4# 440 Black paint 6# 520 White paint D5# 450 Black paint 7# 530 White paint D6# 460 Black paint D1# 490 White paint D7# 470 Black paint D2# 430 Yellow paint 3# 580 Black paint D3# 420 Yellow paint 4# 560 Black paint D4# 420 Yellow paint 5# 550 Black paint D5# 450 Yellow paint 6# 530 Black paint D6# 440 Yellow paint 7# 530 Black paint D7# 430 Yellow paint D1# 490 White paint 3# 570 Yellow paint D2# 460 White paint 4# 530 Yellow paint D3# 450 White paint 5# 550 Yellow paint D4# 440 White paint 6# 510 Yellow paint D5# 460 White paint 7# 510 Yellow paint D6# 470 White paint D1# 470 Yellow paint D7# 480

[0119] It can be seen that the anti-rust paint provided by the embodiment of the present invention has better anti-sagging performance.

[0120] 3. Corrosion resistance evaluation.

[0121] The corrosion resistance of the paint was evaluated using the method described in GB / T 38020.2-2019 Gold alloy coatings for watch cases and accessories Part 2: Tests for purity, thickness, corrosion resistance and adhesion. Specifically, during the paint coating stage, the surface of the coating was coated with each group of paint, and a second coat was applied 20 minutes later, and then dried and tested.

[0122] The experimental results are shown in Table 5 below:

[0123] Table 5

[0124]

[0125]

[0126] It can be seen that the anti-rust paint provided by the present invention has better corrosion resistance.

[0127] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A high flash point alkyd resin, characterized in that: Made from the following raw materials in parts by weight: 130-150 parts of polyol, 50-100 parts of enzymatically hydrolyzed cottonseed oil, 200-300 parts of oleic acid, 200-280 parts of hyodeoxycholic acid, 210-230 parts of phthalic anhydride, 20-40 parts of S-1500# solvent oil, 15-30 parts of octadecene and 225-255 parts of trimethylbenzene; The preparation method of enzymolyzed cottonseed oil comprises the following steps: mixing cottonseed oil and water in a weight ratio of 7-9:1-3, adding lipase and soybean lecithin, maintaining the temperature at 30-50°C for reaction, and obtaining enzymolyzed cottonseed oil.

2. The high flash point alkyd resin according to claim 1, characterized in that The polyol is selected from at least one of pentaerythritol, dipentaerythritol and tripentaerythritol.

3. The high flash point alkyd resin according to claim 2, characterized in that: The polyol is a mixture of pentaerythritol and dipentaerythritol.

4. The high flash point alkyd resin according to claim 3, characterized in that: The polyol is a mixture of pentaerythritol and dipentaerythritol in a weight ratio of 3-4:

1.

5. The high flash point alkyd resin according to claim 1, characterized in that The weight of the lipase is 0.5%-3% of the weight of the cottonseed oil; the type of the lipase is selected from one or more of porcine pancreatic lipase, plant lipase, and plant phospholipase; the weight of the soybean lecithin is 1%-2% of the weight of the cottonseed oil.

6. The method for preparing a high flash point alkyd resin according to any one of claims 1 to 5, characterized in that: The following steps are involved: The polyol, enzymatically hydrolyzed cottonseed oil, oleic acid, hyodeoxycholic acid, phthalic anhydride, trimethylbenzene and octadecene are mixed in a formula, refluxed for esterification, cooled, and mixed with S-1500# solvent oil to obtain a high flash point alkyd resin.

7. An alkyd antirust paint composition, characterized in that: The following ingredients are included by weight: 25-40 parts of high flash point alkyd resin, 1-25 parts of pigment, 20-40 parts of anti-rust filler and 5-10 parts of solvent; Wherein, the high flash point alkyd resin is the high flash point alkyd resin according to any one of claims 1 to 5 or the high flash point alkyd resin prepared by the preparation method according to claim 6; The anti-rust filler contains cerium element; The solvent is selected from at least one of diethylene glycol methyl ether, diethylene glycol ethyl ether, diethylene glycol butyl ether, dipropylene glycol methyl ether, dipropylene glycol butyl ether, ethylene glycol diacetate, dimethyl succinate, dimethyl glutarate, and dimethyl adipate.

8. The alkyd antirust paint composition according to claim 7, characterized in that: The pigment is selected from at least one of white pigment, yellow pigment, black pigment, red pigment, green pigment and blue pigment.

9. The alkyd antirust paint composition according to claim 7, characterized in that: The anti-rust filler is selected from one or more of the following substances: Nano cerium dioxide, cerium-doped aluminum phosphate, cerium-doped lanthanum phosphate, cerium-doped barium sulfate, and cerium-doped magnesium hydroxide.

10. The alkyd antirust paint composition according to claim 7, characterized in that: The composition comprises, by weight: 30-35 parts of high flash point alkyd resin, 1-20 parts of pigment, 25-35 parts of anti-rust filler and 6-9 parts of solvent.

11. The alkyd antirust paint composition according to claim 7, characterized in that: The invention also includes 0.1-1 part of auxiliary agent by weight.

12. The alkyd antirust paint composition according to claim 11, characterized in that: The additive is selected from one or more of an anti-rust additive, a dispersing additive, an adhesion additive, a leveling additive, a defoaming additive, and an anti-settling additive.

13. Alkyd antirust paint made from the alkyd antirust paint composition according to any one of claims 7 to 12.

14. The method for preparing the alkyd antirust paint according to claim 13, comprising the following steps: The alkyd anti-rust paint is obtained by mixing the high flash point alkyd resin and the solvent in a formula amount, stirring, and adding the pigment and the anti-rust filler.

15. Use of the high flash point alkyd resin according to any one of claims 1 to 5, or the high flash point alkyd resin obtained by the preparation method according to claim 6, or the alkyd antirust paint composition according to any one of claims 7 to 12, or the alkyd antirust paint according to claim 13, or the alkyd antirust paint obtained by the preparation method according to claim 14 in coatings.

16. A coating, characterized in that: The invention comprises the high flash point alkyd resin as described in any one of claims 1 to 5, the high flash point alkyd resin obtained by the preparation method as described in claim 6, the alkyd antirust paint composition as described in any one of claims 7 to 12, the alkyd antirust paint as described in claim 13, or the alkyd antirust paint obtained by the preparation method as described in claim 14.

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