Composition for environment-friendly coating material and preparation method thereof

Abstract

The invention relates to the technical field of coatings, and discloses a composition for an environment-friendly coating material and a preparation method thereof, the composition comprises 55-75 parts by weight of a mixed raw material and 25-45 parts by weight of a functional master batch; the mixed raw material is prepared from the following components in parts by weight: 40 to 45 parts of epoxy resin E51, 2 to 4 parts of biphenyl modified bis (triazole), 1 to 3 parts of epoxidized cardanol, 0.1 to 0.3 part of a de-foaming agent BYK-024, 0.2 to 0.4 part of a flatting agent BYK-333, 1 to 1.2 parts of 2, 4, 6-tri (dimethylamino methyl) phenol and 6 to 8 parts of ethyl acetate; the functional master batch is composed of tourmaline powder and nano silver powder, and the weight part ratio of the tourmaline powder to the nano silver powder is 99: 1. The composition for the environment-friendly coating material has good sterilization, water resistance, adhesive force and impact resistance effects.

Description

Technical Field

[0001] The present invention relates to the technical field of coatings, and in particular to an environmentally friendly coating material composition and a preparation method thereof. Background Art

[0002] Traditional coating materials often face challenges during use, including insufficient water resistance, poor adhesion to metal substrates, and inadequate impact resistance. For example, in wet environments, coatings are prone to blistering and flaking due to water absorption. When subjected to external impact, the coatings can crack or even peel, leaving the substrate unprotected. Furthermore, some traditional coating materials can suffer from poor environmental performance due to inappropriate composition design, failing to meet modern industry's demand for green, environmentally friendly materials. With the development of industry, higher performance requirements are being placed on coating materials, requiring them to possess not only excellent physical and mechanical properties but also good water resistance and environmental characteristics. Patent application CN118791924A discloses an environmentally friendly acrylic barrier coating composition for paper cups, its preparation method, and its application. While this invention exhibits good high-temperature resistance, its water resistance remains unchanged. Therefore, developing a coating composition that combines antibacterial, water-resistant, strong adhesion, and environmental friendliness has become a key research direction in the field of coatings technology. Summary of the Invention

[0003] (1) Technical problems solved In view of the deficiencies of the prior art, the present invention provides a composition for an environmentally friendly coating material and a preparation method thereof, which has good sterilization, water resistance, adhesion, impact resistance and negative ion inducing effects.

[0004] (2) Technical solution To achieve the above object, the present invention provides the following technical solution: a composition for an environmentally friendly coating material, characterized in that it comprises 55-75 parts by weight of a mixed raw material and 25-45 parts by weight of a functional masterbatch; The mixed raw material is composed of the following components by weight: 40-45 parts by weight of epoxy resin E51, 2-4 parts by weight of biphenyl-modified bistriazole, 1-3 parts by weight of epoxidized cardanol, 0.1-0.3 parts by weight of defoamer BYK-024, 0.2-0.4 parts by weight of leveling agent BYK-333, 1-1.2 parts by weight of 2,4,6-tris(dimethylaminomethyl)phenol, and 6-8 parts by weight of ethyl acetate; The functional masterbatch consists of tourmaline powder and nano silver powder, with a weight ratio of 99:1.

[0005] Furthermore, the preparation method of the biphenyl-modified bistriazole is as follows: S1. Dehydroabietic acid and thioformyl dihydrazide were added to a reactor, stirred and mixed, heated to 165-170°C for 40-48 minutes, and then cooled to room temperature. The product was ground into a powder, washed sequentially with boiling water and 0.01 mol / L sodium hydroxide solution, filtered, and dried to obtain dehydroabietyl 1,2,4-triazole; S2. Add 4,4'-biphenyldicarboxaldehyde and dehydroabietyl 1,2,4-triazole to a reactor, stir to mix, continue to add glacial acetic acid, stir until dissolved, carry out Schiff base reaction, heat to 105-110°C for reflux reaction, and purify by column chromatography to obtain biphenyl-modified bistriazole.

[0006] Furthermore, the molar ratio of dehydroabietic acid to thiocarbamate dihydrazide in S1 is 17-20 mmol: 22-24 mmol.

[0007] Furthermore, the usage ratio of 4,4'-biphenyldicarboxaldehyde, dehydroabietyl 1,2,4-triazole and glacial acetic acid in S2 is 5-6 mmol: 10-12 mmol: 45-55 mL.

[0008] Furthermore, the reflux reaction time in S2 is 5-7 hours.

[0009] Furthermore, the preparation method of the epoxidized cardanol is as follows: adding a mixed solution of cardanol glycidyl ether, dichloromethane and ethanol to a reactor, stirring and mixing, continuing to add m-chloroperbenzoic acid, reacting at 26-30°C for 1-1.5h, and then washing with saturated sodium sulfite solution, saturated sodium bicarbonate solution, and saturated sodium chloride solution in sequence. After washing until neutral, rotary evaporation is performed using a rotary evaporator to obtain epoxidized cardanol.

[0010] Furthermore, the usage ratio of the cardanol glycidyl ether, dichloromethane, ethanol, and m-chloroperbenzoic acid is 1 mmol: 28-35 mL: 7-8 mL: 1.3-1.4 mmol.

[0011] Furthermore, the functional masterbatch is composed of commercially available tourmaline powder and commercially available nano-silver powder in a weight ratio of 99:1. The above two powders are put into a three-dimensional mixer according to their weight and mixed at a slow speed for 10-30 minutes to obtain a functional masterbatch.

[0012] Furthermore, the preparation method of the composition for environmentally friendly coating materials is as follows: epoxy resin E51, biphenyl-modified bistriazole, epoxidized cardanol, 2,4,6-tris(dimethylaminomethyl)phenol, defoamer BYK-024, and leveling agent BYK-333 are added to ethyl acetate, stirred and mixed for 25-30 minutes to obtain a mixed raw material, and then the functional masterbatch and the mixed raw material are mixed in a mixer and slowly stirred for 10-30 minutes to obtain a composition for environmentally friendly coating materials.

[0013] (3) Beneficial technical effects Epoxy resin E51, the coating's primary film-forming substance, contains numerous epoxy groups in its molecular chain, along with epoxy groups from epoxidized cardanol, forming an epoxy system. Curing occurs under the action of 2,4,6-tris(dimethylaminomethyl)phenol. The bisthiol (-HS) groups in the biphenyl-modified bistriazole also promote curing, forming a dense network. The biphenyl groups maintain the rigidity of the overall structure, preventing cracking caused by excessive deformation and improving its hydrophobicity and impact resistance. Furthermore, the biphenyl groups in the biphenyl-modified bistriazole, along with the long-chain alkanes and dehydrogenated longitudinal groups in the cardanol, also possess significant hydrophobic properties. The bistriazole structure in the biphenyl-modified bistriazole acts as a ligand, binding to metal ions through coordination bonds to form a stable complex, enhancing adhesion to the metal and resisting flaking. The long chains in the epoxidized cardanol also enhance bonding strength through physical adsorption, making the coating resistant to flaking. The functional masterbatch uses tourmaline powder as the base material, superimposed with nano-silver powder material, scientifically proportioned, and combined into a mixture. The mixture can continuously induce negative ions and release far infrared, which can effectively kill bacteria, deodorize and remove odors, improve air quality, and promote skin health. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the reaction formula for biphenyl-modified bistriazole.

[0015] Figure 2 This is the infrared spectrum of biphenyl-modified bistriazole. DETAILED DESCRIPTION

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] 2,4,6-Tris(dimethylaminomethyl)phenol, analytical grade, was purchased from Shanghai MacLean Biochemical Technology Co., Ltd.

[0019] Example 1 A composition for an environmentally friendly coating material, characterized by comprising 75 parts by weight of a mixed raw material and 25 parts by weight of a functional masterbatch; The mixed raw material is composed of the following components by weight: 40 parts by weight of epoxy resin E51, 2 parts by weight of biphenyl-modified bistriazole, 1 part by weight of epoxidized cardanol, 0.1 parts by weight of defoamer BYK-024, 0.2 parts by weight of leveling agent BYK-333, 1 part by weight of 2,4,6-tris(dimethylaminomethyl)phenol, and 6 parts by weight of ethyl acetate; The functional masterbatch consists of tourmaline powder and nano silver powder, with a weight ratio of 99:1.

[0020] The preparation method of the biphenyl-modified bistriazole is as follows: S1. 17 mmol of dehydroabietic acid and 22 mmol of thiocarboxylic dihydrazide were added to a reactor, stirred and mixed, and heated to 165°C for 40 min. After completion, the reaction was cooled to room temperature, and the product was ground into a powder. The powder was washed with boiling water and 0.01 mol / L sodium hydroxide solution, filtered, and dried to obtain dehydroabietyl 1,2,4-triazole. S2. Add 5 mmol of 4,4'-biphenyldicarboxaldehyde and 10 mmol of dehydroabietyl 1,2,4-triazole into the reactor and stir to mix. Then add 45 mL of glacial acetic acid and stir until dissolved. Perform Schiff base reaction and heat to 105°C for reflux reaction for 5 h. After completion, purify by column chromatography to obtain biphenyl-modified bistriazole. Figure 1 In the infrared spectrum, 2550 cm -1 It is the characteristic absorption peak of -HS, 1625cm -1 It is the absorption peak of C=N bond, 1580cm -1 It is the absorption peak of benzene ring.

[0021] The preparation method of the epoxidized cardanol comprises the following steps: adding a mixed solution of 1 mmol of cardanol glycidyl ether, 28 mL of dichloromethane and 7 mL of ethanol into a reactor, stirring and mixing, continuously adding 1.3 mmol of m-chloroperbenzoic acid, reacting at 26° C. for 1 hour, and then washing with a saturated sodium sulfite solution, a saturated sodium bicarbonate solution and a saturated sodium chloride solution in sequence, washing until neutral, and then rotary evaporating with a rotary evaporator to obtain the epoxidized cardanol.

[0022] The functional masterbatch is composed of commercially available tourmaline powder and commercially available nano silver powder in a weight ratio of 99:1. The two powders are put into a three-dimensional mixer according to their weight and mixed at a slow speed for 10 minutes to obtain a functional masterbatch. The preparation method of the composition for the environmentally friendly coating material comprises: adding epoxy resin E51, biphenyl-modified bistriazole, epoxidized cardanol, 2,4,6-tris(dimethylaminomethyl)phenol, defoamer BYK-024, and leveling agent BYK-333 to ethyl acetate, stirring and mixing for 25 minutes to obtain a mixed raw material, and then mixing the functional masterbatch and the mixed raw material in a mixer with slow stirring for 10 minutes to obtain the composition for the environmentally friendly coating material.

[0023] Example 2 A composition for an environmentally friendly coating material, characterized by comprising 55 parts by weight of a mixed raw material and 45 parts by weight of a functional masterbatch; The mixed raw material is composed of the following components by weight: 45 parts by weight of epoxy resin E51, 4 parts by weight of biphenyl-modified bistriazole, 3 parts by weight of epoxidized cardanol, 0.3 parts by weight of defoamer BYK-024, 0.4 parts by weight of leveling agent BYK-333, 1.2 parts by weight of 2,4,6-tris(dimethylaminomethyl)phenol, and 8 parts by weight of ethyl acetate; The functional masterbatch consists of tourmaline powder and nano silver powder, with a weight ratio of 99:1.

[0024] The preparation method of the biphenyl-modified bistriazole is as follows: S1. 20 mmol of dehydroabietic acid and 24 mmol of thiocarboxylic acid dihydrazide were added to a reactor, stirred and mixed, and heated to 170°C for 48 min. After completion, the reaction was cooled to room temperature, and the product was ground into a powder. The powder was washed with boiling water and 0.01 mol / L sodium hydroxide solution, filtered, and dried to obtain dehydroabietyl 1,2,4-triazole. S2. Add 6 mmol of 4,4'-biphenyldicarboxaldehyde and 12 mmol of dehydroabietyl 1,2,4-triazole into the reactor and stir to mix. Then add 55 mL of glacial acetic acid and stir until dissolved. Perform Schiff base reaction and heat to 110°C for reflux reaction for 7 h. After completion, purify by column chromatography to obtain biphenyl-modified bistriazole.

[0025] The preparation method of the epoxidized cardanol comprises the following steps: adding a mixed solution of 1 mmol of cardanol glycidyl ether, 35 mL of dichloromethane and 8 mL of ethanol into a reactor, stirring and mixing, continuously adding 1.4 mmol of m-chloroperbenzoic acid, reacting at 30° C. for 1.5 hours, and then washing with a saturated sodium sulfite solution, a saturated sodium bicarbonate solution, and a saturated sodium chloride solution in sequence. After washing until neutral, the mixture is evaporated using a rotary evaporator to obtain the epoxidized cardanol.

[0026] The functional masterbatch is composed of commercially available tourmaline powder and commercially available nano silver powder in a weight ratio of 99:1. The two powders are put into a three-dimensional mixer according to their weight and mixed at a slow speed for 30 minutes to obtain the functional masterbatch. The preparation method of the composition for the environmentally friendly coating material comprises: adding epoxy resin E51, biphenyl-modified bistriazole, epoxidized cardanol, 2,4,6-tris(dimethylaminomethyl)phenol, defoamer BYK-024, and leveling agent BYK-333 to ethyl acetate, stirring and mixing for 30 minutes to obtain a mixed raw material, and then mixing the functional masterbatch and the mixed raw material in a mixer with slow stirring for 30 minutes to obtain the composition for the environmentally friendly coating material.

[0027] Example 3 A composition for an environmentally friendly coating material, characterized by comprising 70 parts by weight of a mixed raw material and 30 parts by weight of a functional masterbatch; The mixed raw material is composed of the following components by weight: 42 parts by weight of epoxy resin E51, 3 parts by weight of biphenyl-modified bistriazole, 2 parts by weight of epoxidized cardanol, 0.2 parts by weight of defoamer BYK-024, 0.3 parts by weight of leveling agent BYK-333, 1.1 parts by weight of 2,4,6-tris(dimethylaminomethyl)phenol, and 7 parts by weight of ethyl acetate; The functional masterbatch consists of tourmaline powder and nano silver powder, with a weight ratio of 99:1.

[0028] The preparation method of the biphenyl-modified bistriazole is as follows: S1. 18 mmol of dehydroabietic acid and 23 mmol of thiocarboxylic dihydrazide were added to a reactor, stirred and mixed, and heated to 167°C for 45 min. After completion, the reaction was cooled to room temperature, and the product was ground into a powder. The powder was washed with boiling water and 0.01 mol / L sodium hydroxide solution, filtered, and dried to obtain dehydroabietyl 1,2,4-triazole. S2. Add 5.5 mmol of 4,4'-biphenyldicarboxaldehyde and 11 mmol of dehydroabietyl 1,2,4-triazole into the reactor and stir to mix. Then add 50 mL of glacial acetic acid and stir until dissolved. Perform Schiff base reaction and heat to 107°C for 6 h. After reaction, purify by column chromatography to obtain biphenyl-modified bistriazole.

[0029] The preparation method of the epoxidized cardanol comprises the following steps: adding a mixed solution of 1 mmol of cardanol glycidyl ether, 32 mL of dichloromethane and 7.5 mL of ethanol into a reactor, stirring and mixing, continuously adding 1.35 mmol of m-chloroperbenzoic acid, reacting at 28° C. for 1.2 hours, and then washing with a saturated sodium sulfite solution, a saturated sodium bicarbonate solution and a saturated sodium chloride solution in sequence. After washing until neutral, the mixture is evaporated using a rotary evaporator to obtain the epoxidized cardanol.

[0030] The functional masterbatch is composed of commercially available tourmaline powder and commercially available nano silver powder in a weight ratio of 99:1. The two powders are placed in a three-dimensional mixer according to their weight and mixed at a slow speed for 15 minutes to obtain the functional masterbatch. The preparation method of the composition for the environmentally friendly coating material comprises: adding epoxy resin E51, biphenyl-modified bistriazole, epoxidized cardanol, 2,4,6-tris(dimethylaminomethyl)phenol, defoamer BYK-024, and leveling agent BYK-333 to ethyl acetate, stirring and mixing for 27 minutes to obtain a mixed raw material, and then mixing the functional masterbatch and the mixed raw material in a mixer with slow stirring for 20 minutes to obtain the composition for the environmentally friendly coating material.

[0031] Comparative Example 1 A composition for an environmentally friendly coating material, characterized by comprising 70 parts by weight of a mixed raw material and 30 parts by weight of a functional masterbatch; The mixed raw material is composed of the following components by weight: 42 parts by weight of epoxy resin E51, 3 parts by weight of dehydroabietic acid, 2 parts by weight of epoxidized cardanol (prepared by the same method as in Example 3), 0.2 parts by weight of defoamer BYK-024, 0.3 parts by weight of leveling agent BYK-333, 1.1 parts by weight of 2,4,6-tris(dimethylaminomethyl)phenol, and 7 parts by weight of ethyl acetate; The functional masterbatch consists of tourmaline powder and nano silver powder, with a weight ratio of 99:1.

[0032] Epoxy resin E51, dehydroabietic acid, epoxidized cardanol, 2,4,6-tris(dimethylaminomethyl)phenol, defoamer BYK-024, and leveling agent BYK-333 were added to ethyl acetate and stirred for 27 minutes to obtain a mixed raw material. The functional masterbatch and the mixed raw material were then mixed in a mixer with slow stirring for 20 minutes to obtain a composition for an environmentally friendly coating material.

[0033] The difference between this comparison and Example 3 is that dehydroabietic acid is used instead of biphenyl to modify the bistriazole.

[0034] Comparative Example 2 A composition for an environmentally friendly coating material, characterized by comprising 70 parts by weight of a mixed raw material and 30 parts by weight of a functional masterbatch; The mixed raw material is composed of the following components by weight: 42 parts by weight of epoxy resin E51, 3 parts by weight of biphenyl-modified bistriazole (prepared by the same method as in Example 3), 0.2 parts by weight of defoamer BYK-024, 0.3 parts by weight of leveling agent BYK-333, 1.1 parts by weight of 2,4,6-tris(dimethylaminomethyl)phenol, and 7 parts by weight of ethyl acetate; The functional masterbatch consists of tourmaline powder and nano silver powder, with a weight ratio of 99:1.

[0035] Epoxy resin E51, biphenyl-modified bistriazole, 2,4,6-tris(dimethylaminomethyl)phenol, defoamer BYK-024, and leveling agent BYK-333 were added to ethyl acetate and stirred for 27 minutes to obtain a mixed raw material. The functional masterbatch and the mixed raw material were then mixed in a mixer with slow stirring for 20 minutes to obtain a composition for an environmentally friendly coating material.

[0036] The difference between this comparison and Example 3 is that no epoxidized cardanol is added.

[0037] Static water contact angle testing was conducted according to GB / T 23764-2009. Impact resistance was tested according to GB / T 1732-2020, using a 1000g steel ball to determine the maximum height (in cm) the material surface can withstand without damage, cracking, or flaking when dropped freely from a certain height. Adhesion between the coating and metal was tested according to GB / T 9286-2021. Antibacterial testing was conducted according to GB / T 21866-2008, Determination of Antibacterial Activity and Antibacterial Efficacy of Antimicrobial Coatings (Paint Films).

[0038] Table 1: Performance test of environmentally friendly coating material composition project Impact resistance (1000g steel ball, cm) Static water contact angle (°) Adhesion grade (grade) Antibacterial activity (%) Example 1 96 135.9 0 99.9 Example 2 103 138.5 0 99.9 Example 3 98 137.1 0 99.9 Comparative Example 1 83 120.4 1 99.9 Comparative Example 2 80 123.7 1 99.9 As shown in Table 1, the environmentally friendly coating material composition prepared by the present invention has good impact resistance, water resistance, and adhesion. In Comparative Example 1, dehydroabietic acid was used instead of biphenyl to modify the bistriazole, which lacked the thiol group, triazole group, and biphenyl structure, resulting in decreased performance. In Comparative Example 2, epoxidized cardanol was not added, resulting in decreased performance.

[0039] The present invention has been described in detail above with reference to specific exemplary embodiments. However, it should be understood that various modifications and variations may be made without departing from the scope of the present invention as defined by the appended claims. The detailed description is intended to be illustrative only and not restrictive, and any such modifications and variations, if any, are intended to fall within the scope of the present invention as described herein. In addition, the background art is intended to illustrate the current state of research and development and significance of the present technology and is not intended to limit the present invention or the application and fields of application of the present invention.

[0040] More specifically, although exemplary embodiments of the present invention have been described herein, the present invention is not limited to these embodiments, but rather includes any and all embodiments that may be recognized by those skilled in the art based on the foregoing detailed description, such as combinations between the various embodiments, adaptations, and / or substitutions. The limitations in the claims are to be interpreted broadly based on the language used in the claims and are not limited to the examples described in the foregoing detailed description or during the prosecution of this application, which examples should be considered non-exclusive. Any steps recited in any method or process claim may be performed in any order and are not limited to the order set forth in the claims. Therefore, the scope of the invention should be determined solely by the appended claims and their legal equivalents, rather than by the description and examples given above.

[0041] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. When there is a conflict, the definitions in this specification shall prevail. When flow, power, refractive index, time, or other values ​​or parameters are expressed as ranges, preferred ranges, or ranges defined by a series of upper preferred values ​​and lower preferred values, this should be understood to specifically disclose all ranges formed by any pairing of any upper range limit or preferred value with any lower range limit or preferred value, regardless of whether the range is disclosed separately. , 1.5, 1.6, 1.7, 1.8, and 1.9. With respect to subranges, specifically contemplated are "nested subranges" extending from any endpoint within the range. For example, nested sub-ranges of the exemplary range 1-50 may include 1-10, 1-20, 1-30, and 1-40 in one direction, or 50-40, 50-30, 50-20, and 50-10 in the other direction.

Claims

1. A composition for an environmentally friendly coating material, characterized in that: The method comprises 55-75 parts by weight of a mixed raw material and 25-45 parts by weight of a functional masterbatch; The mixed raw material is composed of the following components by weight: 40-45 parts by weight of epoxy resin E51, 2-4 parts by weight of biphenyl-modified bistriazole, 1-3 parts by weight of epoxidized cardanol, 0.1-0.3 parts by weight of defoamer BYK-024, 0.2-0.4 parts by weight of leveling agent BYK-333, 1-1.2 parts by weight of 2,4,6-tris(dimethylaminomethyl)phenol, and 6-8 parts by weight of ethyl acetate; The functional masterbatch consists of tourmaline powder and nano silver powder, with a weight ratio of 99:

1.

2. The environmentally friendly coating material composition according to claim 1, characterized in that: The preparation method of the biphenyl-modified bistriazole is as follows: S1. Dehydroabietic acid and thioformyl dihydrazide were added to a reactor, stirred and mixed, heated to 165-170°C for 40-48 minutes, and then cooled to room temperature. The product was ground into a powder, washed sequentially with boiling water and 0.01 mol / L sodium hydroxide solution, filtered, and dried to obtain dehydroabietyl 1,2,4-triazole; S2. Add 4,4'-biphenyldicarboxaldehyde and dehydroabietyl 1,2,4-triazole to a reactor, stir to mix, continue to add glacial acetic acid, stir until dissolved, carry out Schiff base reaction, heat to 105-110°C for reflux reaction, and purify by column chromatography to obtain biphenyl-modified bistriazole.

3. The environmentally friendly coating material composition according to claim 2, characterized in that: The molar ratio of dehydroabietic acid to thiocarbamate dihydrazide in S1 is 17-20 mmol: 22-24 mmol.

4. The environmentally friendly coating material composition according to claim 2, characterized in that: The usage ratio of 4,4'-biphenyldicarboxaldehyde, dehydroabietyl 1,2,4-triazole and glacial acetic acid in S2 is 5-6 mmol: 10-12 mmol: 45-55 mL.

5. The environmentally friendly coating material composition according to claim 2, characterized in that: The reflux reaction time in S2 is 5-7h.

6. The environmentally friendly coating material composition according to claim 1, characterized in that: The preparation method of the epoxidized cardanol comprises the following steps: adding a mixed solution of cardanol glycidyl ether, dichloromethane and ethanol into a reactor, stirring and mixing, continuously adding m-chloroperbenzoic acid, reacting at 26-30° C. for 1-1.5 hours, and then washing with a saturated sodium sulfite solution, a saturated sodium bicarbonate solution and a saturated sodium chloride solution in sequence, washing until neutral, and then rotary evaporating with a rotary evaporator to obtain the epoxidized cardanol.

7. The environmentally friendly coating material composition according to claim 6, characterized in that: The usage ratio of the cardanol glycidyl ether, dichloromethane, ethanol, and m-chloroperbenzoic acid is 1 mmol: 28-35 mL: 7-8 mL: 1.3-1.4 mmol.

8. The environmentally friendly coating material composition according to claim 1, characterized in that: The functional masterbatch is composed of commercially available tourmaline powder and commercially available nano silver powder in a weight ratio of 99:

1. The above two powders are put into a three-dimensional mixer according to their weight and mixed and slowly stirred for 10-30 minutes to obtain the functional masterbatch.

9. A method for preparing the composition for an environmentally friendly coating material according to any one of claims 1 to 8, characterized in that: The preparation method of the composition for the environmentally friendly coating material comprises: adding epoxy resin E51, biphenyl-modified bistriazole, epoxidized cardanol, 2,4,6-tris(dimethylaminomethyl)phenol, defoamer BYK-024, and leveling agent BYK-333 to ethyl acetate, stirring and mixing for 25-30 minutes to obtain a mixed raw material, and then mixing the functional masterbatch and the mixed raw material in a mixer with slow stirring for 10-30 minutes to obtain the composition for the environmentally friendly coating material.

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