Natural texture imitating coating, preparation method and use method

Abstract

The invention relates to the field of coatings, in particular to a natural-texture-imitating coating, a preparation method and a use method, and aims to solve the problems that an existing natural-texture-imitating coating is poor in antibacterial property, hydrophobic property and stain resistance, and a formed coating is easy to age. According to the natural-texture-imitating coating, hydrophobic light-stable resin serves as a main raw material, modified zinc oxide is added into the hydrophobic light-stable resin, under the synergistic effect of the hydrophobic light-stable resin and the modified zinc oxide, the natural-texture-imitating coating is endowed with excellent antibacterial performance, growth of bacteria and molds can be effectively inhibited, meanwhile, the natural-texture-imitating coating is endowed with excellent hydrophobic and stain-resistant performance, and the coating is environmentally friendly. The paint can effectively prevent permeation of water and stains, keeps the paint clean and beautiful, has excellent chemical stability, prolongs the service life of the paint, has excellent anti-aging and anti-yellowing properties, can keep the color and performance of the paint unchanged for a long time, improves the texture stability of the paint, and has a good application prospect. The paint can still keep a good texture effect in various environments.

Description

Technical Field

[0001] The invention relates to the field of coatings, and in particular to a coating imitating natural textures, a preparation method and a use method thereof. Background Art

[0002] In the field of modern decoration, people are increasingly admiring nature and pursuing unique decorative styles. Natural textures, such as wood grain, stone grain, leather grain, etc., are rich in beauty and artistic charm, and can add different atmospheres such as warmth, elegance or ruggedness to the space. Imitation natural texture coatings are highly valued in the field of architectural decoration due to their realistic natural texture and diverse appearance. However, existing imitation natural texture coatings often have multiple shortcomings. The antibacterial properties are poor, which leads to the growth of mold and bacteria on the coating surface, affecting the indoor environmental hygiene. The hydrophobic and stain-resistant properties are poor, which makes the coating easy to be contaminated and difficult to keep clean and bright. In addition, it is easily affected by sunlight and external environmental factors during use, which leads to aging of the coating, yellowing and brittleness, and it is difficult to present a realistic natural texture effect, which seriously affects people's life experience and the aesthetics of the building.

[0003] Therefore, it is of great practical significance to develop a coating that imitates natural texture, a preparation method and a method of use. Summary of the invention

[0004] In order to overcome the above-mentioned technical problems, the purpose of the present invention is to provide a natural texture imitation coating, a preparation method and a use method, which solves the problem that the existing natural texture imitation coating has poor antibacterial performance and hydrophobic and stain resistance, and the formed coating is easy to age.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A natural texture coating comprising the following components in parts by weight:

[0007] 40-50 parts of hydrophobic light-stable resin, 3-11 parts of pigment, 2-14 parts of modified zinc oxide, 3-7 parts of bentonite, 0.8-1.2 parts of sodium lauryl sulfate, 1-5 parts of zinc stearate, 1-3 parts of carboxymethyl cellulose, 0.3-0.7 parts of defoaming agent, 2-7 parts of dicyclohexylmethane diisocyanate, 20-30 parts of ethyl acetate, 18-22 parts of anhydrous ethanol and 45-55 parts of water;

[0008] Wherein, the hydrophobic light-stable resin is prepared by the following steps:

[0009] Step a1: add perfluoropentanoic acid and N,N-dimethylformamide to a three-necked flask equipped with a stirrer, a thermometer and a constant pressure dropping funnel, stir and react for 20-30 minutes at a temperature of 5-10°C and a stirring rate of 300-400r / min, then add thionyl chloride dropwise while stirring, and control the dropping rate to 1-2 drops / s. After the addition is completed, the temperature is raised to 80-85°C and the stirring reaction is continued for 2-3 hours. After the reaction is completed, the reaction product is cooled to room temperature, then added to ice water, and then extracted with dichloromethane for 2-3 times. The extracts are combined and washed with saturated brine for 2-3 times, then dried with anhydrous magnesium sulfate, and then vacuum filtered. The filtrate is rotary evaporated to remove the solvent to obtain intermediate 1;

[0010] Step a2: Add intermediate 1, N,N-dimethylethylenediamine, anhydrous potassium carbonate and dichloromethane into a three-necked flask equipped with a stirrer, a thermometer and a gas guide tube, introduce nitrogen protection, stir and react for 30-40 minutes at a temperature of -5-0°C and a stirring rate of 300-400r / min, then heat to 80-85°C and continue stirring and reacting for 4-5 hours. After the reaction is completed, the reaction product is cooled to room temperature, and then the solvent is removed by rotary evaporation, and then recrystallized from anhydrous acetone to obtain intermediate 2;

[0011] Step a3: Add intermediate 2, potassium hydroxide, hydroquinone, 3-bromo-1-propylene and N,N-dimethylformamide to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, introduce nitrogen protection, stir and react for 20-30 minutes at a temperature of 25-30° C. and a stirring rate of 300-400 r / min, then heat to 100-110° C. and continue stirring and reacting for 8-10 hours. After the reaction is completed, cool the reaction product to room temperature, then add it to ice ether, and then vacuum filter it. Place the filter cake in a vacuum drying oven and dry it at a temperature of 40-45° C. for 2-3 hours to obtain a fluorine-containing cationic monomer;

[0012] Step a4: Add butyl acrylate, methyl methacrylate, fluorine-containing cationic monomer, maleic anhydride and xylene to a three-necked flask equipped with a stirrer, a thermometer, an air guide tube and a constant pressure dropping funnel, introduce nitrogen protection, stir and react for 20-30 minutes at a temperature of 25-30°C and a stirring rate of 300-400r / min, then heat to reflux and add tert-butyl perbenzoate dropwise while stirring, control the drop rate to 1-2 drops / s, and continue to stir and react for 3-4 hours after the dropwise addition is completed, then add 2,2,6,6-tetramethylpiperidinamine dropwise while stirring, control the drop rate to 1-2 drops / s, and continue to stir and react for 1-2 hours after the dropwise addition is completed, and after the reaction is completed, cool the reaction product to room temperature, then add it to anhydrous methanol, and then vacuum filter it, place the filter cake in a vacuum drying oven, and dry it for 4-5 hours at a temperature of 40-45°C to obtain a hydrophobic photostable resin.

[0013] As a further solution of the present invention: the usage ratio of the perfluoropentanoic acid, N,N-dimethylformamide and thionyl chloride in step a1 is 10 mmol: 0.2-0.4 g: 22-25 mmol.

[0014] As a further scheme of the present invention: the usage ratio of the intermediate 1, N,N-dimethylethylenediamine, anhydrous potassium carbonate and dichloromethane in step a2 is 10mmol:11-13mmol:15-20mmol:40-50mL; wherein, the CAS number of N,N-dimethylethylenediamine is: 108-00-9.

[0015] As a further scheme of the present invention: the usage ratio of the intermediate 2, potassium hydroxide, hydroquinone, 3-bromo-1-propylene and N,N-dimethylformamide in step a3 is 10mmol:11-13mmol:0.1-0.2g:10mmol:50-60mL.

[0016] As a further embodiment of the present invention: the usage ratio of the butyl acrylate, methyl methacrylate, fluorine-containing cationic monomer, maleic anhydride, xylene, tert-butyl perbenzoate and 2,2,6,6-tetramethylpiperidinamine in step a4 is 30-40 g: 10-16 g: 1-9 g: 0.5-5.5 g: 80-100 mL: 1-2 g: 0.3-2.7 g.

[0017] As a further solution of the present invention: the modified zinc oxide is prepared by the following steps:

[0018] Nano zinc oxide, anhydrous ethanol and deionized water are added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen is introduced for protection. The reaction is stirred for 1-1.5 hours at a temperature of 25-30°C and a stirring rate of 300-400r / min. Then, a modifier is added and the temperature is raised to 80-85°C and the stirring reaction is continued for 3-5 hours. After the reaction is completed, the reaction product is cooled to room temperature and then centrifuged. The precipitate is washed with distilled water for 2-3 times, and then placed in a vacuum drying oven and dried at a temperature of 40-45°C for 4-5 hours to obtain modified zinc oxide.

[0019] As a further solution of the present invention: the usage ratio of the nano zinc oxide, anhydrous ethanol, deionized water and modifier is 10g:80-85mL:8-10mL:3-7g.

[0020] As a further solution of the present invention: the modifier is one of titanate coupling agent NDZ-101, titanate coupling agent NDZ-201 and titanate coupling agent NDZ-311.

[0021] As a further solution of the present invention: a method for preparing a natural texture coating comprises the following steps:

[0022] Step 1: Weigh 40-50 parts of hydrophobic light-stable resin, 3-11 parts of pigment, 2-14 parts of modified zinc oxide, 3-7 parts of bentonite, 0.8-1.2 parts of sodium lauryl sulfate, 1-5 parts of zinc stearate, 1-3 parts of carboxymethyl cellulose, 0.3-0.7 parts of defoaming agent, 2-7 parts of dicyclohexylmethane diisocyanate, 20-30 parts of ethyl acetate, 18-22 parts of anhydrous ethanol and 45-55 parts of water according to weight parts, and set aside;

[0023] Step 2: Add hydrophobic light-stable resin, pigment, modified zinc oxide, bentonite, sodium dodecyl sulfate, zinc stearate, carboxymethyl cellulose, defoamer, dicyclohexylmethane diisocyanate, ethyl acetate, anhydrous ethanol and water into a mixer, stir and mix for 10-20 minutes at a temperature of 25-30°C and a stirring rate of 300-400r / min, then stir and mix for 20-30 minutes at a temperature of 25-30°C and a stirring rate of 1000-1200r / min to obtain a natural texture coating.

[0024] As a further solution of the present invention: the defoamer includes one of BYK-028 defoamer, BYK-141 defoamer and BYK-A530 defoamer, or a mixture of two or more of them in any proportion.

[0025] As a further solution of the present invention: the pigment includes one of Pigment Brown 23, Pigment Yellow 138, Aniline Black, Phthalocyanine Blue, Pigment Red 254, Pigment Red 122, Permanent Yellow GR and Pigment Brown 25, and a mixture of any two or more thereof in any proportion.

[0026] As a further solution of the present invention: a method for using a natural texture coating comprises the following steps:

[0027] Remove dust from the wood products, polish them flat, and then evenly apply the natural texture paint on the surface of the wood products by brushing, rolling or spraying. The coating amount is 80-120g / m 2 , and then cured to form a coating.

[0028] Beneficial effects of the present invention:

[0029] The invention discloses a natural texture imitation coating, a preparation method and a use method, wherein a hydrophobic light-stable resin, a pigment, modified zinc oxide, bentonite, sodium dodecyl sulfate, zinc stearate, carboxymethyl cellulose, a defoamer, dicyclohexylmethane diisocyanate, ethyl acetate, anhydrous ethanol and water are added into a mixer and stirred to obtain the natural texture imitation coating; the natural texture imitation coating uses the hydrophobic light-stable resin as a main raw material, and modified zinc oxide is added thereto, and the synergistic effect of the two gives the natural texture imitation coating excellent antibacterial performance, can effectively inhibit the growth of bacteria and mold, is suitable for medical facilities, public places and other areas requiring high hygiene standards, and at the same time gives it excellent hydrophobic and stain-resistant performance, can effectively prevent water The paint can prevent the penetration of dirt and stains, keep the paint clean and beautiful, and has excellent chemical stability, can resist the erosion of various chemical substances, and extend the service life of the paint. The paint has excellent anti-aging and yellowing properties, can keep the color and performance of the paint unchanged for a long time, improves the texture stability of the paint, and enables the paint to maintain a good texture effect under various environments. The paint has excellent comprehensive performance, meets people's demand for high-quality decorative materials, and expands the application range of the paint in various environments. At the same time, the preparation method and the use method are simple and easy, which is convenient for industrial large-scale production and easy for construction personnel to master the operation, which is conducive to the promotion and application of the product and has broad market prospects.

[0030] In the process of preparing the natural texture coating, a hydrophobic light-stable resin is first prepared, and perfluoropentanoic acid is treated with thionyl chloride, and the carboxyl group on the perfluoropentanoic acid is converted into an acyl chloride group to obtain an intermediate 1. Then, the intermediate 1 is reacted with N, N-dimethylethylenediamine, and the acyl chloride group on the intermediate 1 reacts with the amino group on the N, N-dimethylethylenediamine to introduce a tertiary amine group to obtain an intermediate 2. Then, the intermediate 2 is reacted with 3-bromo-1-propylene, and the tertiary amine group on the intermediate 2 reacts with the bromine atom on the 3-bromo-1-propylene to form a quaternary ammonium group, and an olefin group is introduced to obtain a fluorine-containing cationic monomer. Finally, butyl acrylate is used to react with butyl acrylate to obtain a fluorine-containing cationic monomer. Ester, methyl methacrylate, fluorine-containing cationic monomer and maleic anhydride are used as polymerization monomers to form a polymer, and then the amino group on 2,2,6,6-tetramethylpiperidinamine reacts with the anhydride group in the polymer to introduce a hindered amine structure to obtain a hydrophobic light-stable resin; the hydrophobic light-stable resin contains a large number of CF bonds in the molecular structure, which effectively reduces the surface energy of the coating, gives it excellent hydrophobic and stain-resistant properties, and greatly improves the chemical stability; the introduced quaternary ammonium group gives it excellent antibacterial and antibacterial properties, and the introduced hindered amine group gives it excellent anti-aging and oxidation properties, so that the coating is not easy to age and oxidize and reduce performance and yellowing.

[0031] In the process of preparing the natural texture coating, a modified zinc oxide is first prepared, and the nano zinc oxide is modified by a modifier to obtain the modified zinc oxide; the nano zinc oxide modified by the modifier can greatly improve the dispersibility of the nano zinc oxide, so that it can be evenly distributed in the coating, and the performance effect of the coating is good and uniform, and the nano zinc oxide can dissolve zinc ions. The positively charged zinc ions can be adsorbed onto the negatively charged bacterial cell membrane, thereby causing the bacteria to die. At the same time, the nano zinc oxide has excellent light absorption effect and can give it anti-light aging properties; therefore, after adding the modified zinc oxide to the coating, it can enhance the construction of a rough structure on the low surface energy coating, improve the wear resistance of the coating, and further improve its hydrophobicity, and under the synergistic effect with the hydrophobic light-stable resin, give the coating excellent antibacterial and antibacterial properties and anti-aging and oxidation properties. DETAILED DESCRIPTION

[0032] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Embodiment 1:

[0034] This embodiment is a method for preparing a natural texture coating, comprising the following steps:

[0035] Step S1: 10 mmol perfluoropentanoic acid and 0.2 g N, N-dimethylformamide are added to a three-necked flask equipped with a stirrer, a thermometer and a constant pressure dropping funnel, and the mixture is stirred for reaction at a temperature of 5° C. and a stirring rate of 300 r / min for 20 min, and then 22 mmol thionyl chloride is added dropwise while stirring, and the dropping rate is controlled to be 1 drop / s. After the addition is completed, the temperature is raised to 80° C. and the stirring reaction is continued for 2 h. After the reaction is completed, the reaction product is cooled to room temperature, and then added to ice water, and then extracted with dichloromethane twice, the extracts are combined and washed with saturated brine twice, and then dried with anhydrous magnesium sulfate, and then vacuum filtered, and the filtrate is rotary evaporated to remove the solvent to obtain intermediate 1;

[0036] Step S2: 10 mmol of intermediate 1, 11 mmol of N, N-dimethylethylenediamine, 15 mmol of anhydrous potassium carbonate and 40 mL of dichloromethane were added to a three-necked flask equipped with a stirrer, a thermometer and a gas guide tube, and nitrogen was introduced for protection. The mixture was stirred for reaction at a temperature of -5°C and a stirring rate of 300 r / min for 30 min, and then the temperature was raised to 80°C and the stirring reaction was continued for 4 h. After the reaction was completed, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation, and then recrystallized from anhydrous acetone to obtain intermediate 2;

[0037] Step S3: 10 mmol of intermediate 2, 11 mmol of potassium hydroxide, 0.1 g of hydroquinone, 10 mmol of 3-bromo-1-propylene and 50 mL of N,N-dimethylformamide were added to a three-necked flask equipped with a stirrer, a thermometer and an air duct, and nitrogen was introduced for protection. The mixture was stirred for reaction at 25° C. and a stirring rate of 300 r / min for 20 min, and then the mixture was heated to 100° C. and stirred for reaction for 8 h. After the reaction was completed, the reaction product was cooled to room temperature, and then added to ice ether, and then vacuum filtered. The filter cake was placed in a vacuum drying oven and dried at 40° C. for 2 h to obtain a fluorine-containing cationic monomer;

[0038] Step S4: 30g of butyl acrylate, 10g of methyl methacrylate, 1g of fluorine-containing cationic monomer, 0.5g of maleic anhydride and 80mL of xylene are added to a three-necked flask equipped with a stirrer, a thermometer, an air guide tube and a constant pressure dropping funnel, and nitrogen is introduced for protection. The mixture is stirred and reacted for 20min at a temperature of 25°C and a stirring rate of 300r / min. Then, 1g of tert-butyl peroxybenzoate is added dropwise while stirring under reflux conditions, and the dropping rate is controlled to be 1 drop / s. After the dropwise addition is completed, the stirring reaction is continued for 3h, and then 0.3g of 2,2,6,6-tetramethylpiperidinamine is added dropwise while stirring, and the dropping rate is controlled to be 1 drop / s. After the dropwise addition is completed, the stirring reaction is continued for 1h. After the reaction is completed, the reaction product is cooled to room temperature, and then added to anhydrous methanol, and then vacuum filtered. The filter cake is placed in a vacuum drying oven and dried at a temperature of 40°C for 4h to obtain a hydrophobic photostable resin;

[0039] Step S5: 10 g of nano zinc oxide, 80 mL of anhydrous ethanol and 8 mL of deionized water are added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen is introduced for protection. The mixture is stirred for reaction at a temperature of 25° C. and a stirring rate of 300 r / min for 1 h, and then 3 g of a modifier is added and the mixture is heated to 80° C. and stirred for reaction for 3 h. After the reaction is completed, the reaction product is cooled to room temperature and then centrifuged. The precipitate is washed twice with distilled water and then placed in a vacuum drying oven and dried at a temperature of 40° C. for 4 h to obtain modified zinc oxide; the modifier is a titanate coupling agent NDZ-101;

[0040] Step S6: 40 parts of hydrophobic light-stable resin, 3 parts of pigment, 2 parts of modified zinc oxide, 3 parts of bentonite, 0.8 parts of sodium dodecyl sulfate, 1 part of zinc stearate, 1 part of carboxymethyl cellulose, 0.3 parts of defoamer, 2 parts of dicyclohexylmethane diisocyanate, 20 parts of ethyl acetate, 18 parts of anhydrous ethanol and 45 parts of water are weighed according to weight parts for use; the defoamer is BYK-028 defoamer; the pigment is Pigment Brown 23;

[0041] Step S7: Add hydrophobic light-stable resin, pigment, modified zinc oxide, bentonite, sodium dodecyl sulfate, zinc stearate, carboxymethyl cellulose, defoamer, dicyclohexylmethane diisocyanate, ethyl acetate, anhydrous ethanol and water into a mixer, stir and mix at a temperature of 25°C and a stirring rate of 300 r / min for 10 minutes, then stir and mix at a temperature of 25°C and a stirring rate of 1000 r / min for 20 minutes to obtain a natural texture coating.

[0042] Embodiment 2:

[0043] This embodiment is a method for preparing a natural texture coating, comprising the following steps:

[0044] Step S1: 10 mmol perfluoropentanoic acid and 0.3 g N, N-dimethylformamide were added to a three-necked flask equipped with a stirrer, a thermometer and a constant pressure dropping funnel, and the mixture was stirred for reaction for 25 min at a temperature of 7° C. and a stirring rate of 350 r / min, and then 24 mmol thionyl chloride was added dropwise while stirring, and the dropping rate was controlled to be 1 drop / s. After the addition was completed, the mixture was heated to 82° C. and the stirring reaction was continued for 2.5 h. After the reaction was completed, the reaction product was cooled to room temperature, and then added to ice water, and then extracted with dichloromethane twice, the extracts were combined and washed with saturated brine twice, and then dried with anhydrous magnesium sulfate, and then vacuum filtered, and the filtrate was rotary evaporated to remove the solvent to obtain intermediate 1;

[0045] Step S2: 10 mmol of intermediate 1, 12 mmol of N, N-dimethylethylenediamine, 18 mmol of anhydrous potassium carbonate and 45 mL of dichloromethane were added to a three-necked flask equipped with a stirrer, a thermometer and a gas guide tube, and nitrogen was introduced for protection. The mixture was stirred at a temperature of -3°C and a stirring rate of 350 r / min for 35 min, and then the temperature was raised to 82°C and the stirring reaction was continued for 4.5 h. After the reaction was completed, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation, and then recrystallized from anhydrous acetone to obtain intermediate 2;

[0046] Step S3: 10 mmol of intermediate 2, 12 mmol of potassium hydroxide, 0.15 g of hydroquinone, 10 mmol of 3-bromo-1-propylene and 55 mL of N,N-dimethylformamide were added to a three-necked flask equipped with a stirrer, a thermometer and an air duct, and nitrogen was introduced for protection. The mixture was stirred for reaction at a temperature of 28° C. and a stirring rate of 350 r / min for 25 min, and then the mixture was heated to 105° C. and stirred for reaction for 9 h. After the reaction was completed, the reaction product was cooled to room temperature, and then added to ice ether, and then vacuum filtered. The filter cake was placed in a vacuum drying oven and dried at a temperature of 42° C. for 2.5 h to obtain a fluorine-containing cationic monomer;

[0047] Step S4: 35g of butyl acrylate, 13g of methyl methacrylate, 5g of fluorine-containing cationic monomer, 3g of maleic anhydride and 90mL of xylene are added to a three-necked flask equipped with a stirrer, a thermometer, an air guide tube and a constant pressure dropping funnel, and nitrogen is introduced for protection. The reaction is stirred for 25min at a temperature of 28°C and a stirring rate of 350r / min. Then, 1.5g of tert-butyl perbenzoate is added dropwise while stirring under reflux conditions, and the dropping rate is controlled to be 1 drop / s. After the dropwise addition is completed, the stirring reaction is continued for 3.5h, and then 1.5g of 2,2,6,6-tetramethylpiperidinamine is added dropwise while stirring, and the dropping rate is controlled to be 1 drop / s. After the dropwise addition is completed, the stirring reaction is continued for 1.5h. After the reaction is completed, the reaction product is cooled to room temperature, and then added to anhydrous methanol, and then vacuum filtered. The filter cake is placed in a vacuum drying oven and dried at a temperature of 42°C for 4.5h to obtain a hydrophobic photostable resin;

[0048] Step S5: 10 g of nano zinc oxide, 82 mL of anhydrous ethanol and 9 mL of deionized water are added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen is introduced for protection. The mixture is stirred for reaction at a temperature of 28° C. and a stirring rate of 350 r / min for 1 h, and then 5 g of a modifier is added and the mixture is heated to 82° C. and stirred for reaction for 4 h. After the reaction is completed, the reaction product is cooled to room temperature and then centrifuged. The precipitate is washed twice with distilled water and then placed in a vacuum drying oven and dried at a temperature of 42° C. for 4.5 h to obtain modified zinc oxide; the modifier is a titanate coupling agent NDZ-201;

[0049] Step S6: weigh 45 parts of hydrophobic light-stable resin, 7 parts of pigment, 8 parts of modified zinc oxide, 5 parts of bentonite, 1 part of sodium dodecyl sulfate, 3 parts of zinc stearate, 2 parts of carboxymethyl cellulose, 0.5 parts of defoamer, 4 parts of dicyclohexylmethane diisocyanate, 25 parts of ethyl acetate, 20 parts of anhydrous ethanol and 50 parts of water according to weight parts, and set aside; the defoamer is BYK-141 defoamer; the pigment is Pigment Yellow 138;

[0050] Step S7: Add hydrophobic light-stable resin, pigment, modified zinc oxide, bentonite, sodium dodecyl sulfate, zinc stearate, carboxymethyl cellulose, defoamer, dicyclohexylmethane diisocyanate, ethyl acetate, anhydrous ethanol and water into a mixer, stir and mix at a temperature of 28° C. and a stirring rate of 350 r / min for 15 minutes, then stir and mix at a temperature of 28° C. and a stirring rate of 1100 r / min for 25 minutes to obtain a natural texture coating.

[0051] Embodiment 3:

[0052] This embodiment is a method for preparing a natural texture coating, comprising the following steps:

[0053] Step S1: 10 mmol perfluoropentanoic acid and 0.4 g N, N-dimethylformamide are added to a three-necked flask equipped with a stirrer, a thermometer and a constant pressure dropping funnel, and the mixture is stirred for reaction for 30 min at a temperature of 10° C. and a stirring rate of 400 r / min, and then 25 mmol thionyl chloride is added dropwise while stirring, and the dropping rate is controlled to be 2 drops / s. After the addition is completed, the mixture is heated to 85° C. and the stirring reaction is continued for 3 h. After the reaction is completed, the reaction product is cooled to room temperature, and then added to ice water, and then extracted with dichloromethane for 3 times, the extracts are combined and washed with saturated brine for 3 times, and then dried with anhydrous magnesium sulfate, and then vacuum filtered, and the filtrate is rotary evaporated to remove the solvent to obtain intermediate 1;

[0054] Step S2: 10 mmol of intermediate 1, 13 mmol of N, N-dimethylethylenediamine, 20 mmol of anhydrous potassium carbonate and 50 mL of dichloromethane were added to a three-necked flask equipped with a stirrer, a thermometer and a gas guide tube, and nitrogen was introduced for protection. The mixture was stirred at 0° C. and a stirring rate of 400 r / min for 40 min, and then the temperature was raised to 85° C. and the stirring reaction was continued for 5 h. After the reaction was completed, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation, and then recrystallized from anhydrous acetone to obtain intermediate 2;

[0055] Step S3: 10 mmol of intermediate 2, 13 mmol of potassium hydroxide, 0.2 g of hydroquinone, 10 mmol of 3-bromo-1-propylene and 60 mL of N,N-dimethylformamide were added to a three-necked flask equipped with a stirrer, a thermometer and an air duct, and nitrogen was introduced for protection. The mixture was stirred for reaction at a temperature of 30° C. and a stirring rate of 400 r / min for 30 min, and then the mixture was heated to 110° C. and the stirring reaction was continued for 10 h. After the reaction was completed, the reaction product was cooled to room temperature, and then added to ice ether, and then vacuum filtered. The filter cake was placed in a vacuum drying oven and dried at a temperature of 45° C. for 3 h to obtain a fluorine-containing cationic monomer;

[0056] Step S4: 40g of butyl acrylate, 16g of methyl methacrylate, 9g of fluorine-containing cationic monomer, 5.5g of maleic anhydride and 100mL of xylene are added to a three-necked flask equipped with a stirrer, a thermometer, an air guide tube and a constant pressure dropping funnel, and nitrogen is introduced for protection. The mixture is stirred and reacted for 30min at a temperature of 30°C and a stirring rate of 400r / min. Then, 2g of tert-butyl perbenzoate is added dropwise while stirring under reflux conditions, and the dropping rate is controlled to 2 drops / s. After the dropwise addition is completed, the stirring reaction is continued for 4h, and then 2.7g of 2,2,6,6-tetramethylpiperidinamine is added dropwise while stirring, and the dropping rate is controlled to 2 drops / s. After the dropwise addition is completed, the stirring reaction is continued for 2h. After the reaction is completed, the reaction product is cooled to room temperature, and then added to anhydrous methanol, and then vacuum filtered. The filter cake is placed in a vacuum drying oven and dried at a temperature of 45°C for 5h to obtain a hydrophobic photostable resin;

[0057] Step S5: 10 g of nano zinc oxide, 85 mL of anhydrous ethanol and 10 mL of deionized water are added to a three-necked flask equipped with a stirrer, a thermometer and an air guide tube, and nitrogen is introduced for protection. The mixture is stirred for reaction at a temperature of 30° C. and a stirring rate of 400 r / min for 1.5 h, and then 7 g of a modifier is added and the mixture is heated to 85° C. and stirred for reaction for 5 h. After the reaction is completed, the reaction product is cooled to room temperature and then centrifuged. The precipitate is washed 3 times with distilled water and then placed in a vacuum drying oven and dried at a temperature of 45° C. for 5 h to obtain modified zinc oxide; the modifier is a titanate coupling agent NDZ-311;

[0058] Step S6: weigh 50 parts of hydrophobic light-stable resin, 11 parts of pigment, 14 parts of modified zinc oxide, 7 parts of bentonite, 1.2 parts of sodium lauryl sulfate, 5 parts of zinc stearate, 3 parts of carboxymethyl cellulose, 0.7 parts of defoamer, 7 parts of dicyclohexylmethane diisocyanate, 30 parts of ethyl acetate, 22 parts of anhydrous ethanol and 55 parts of water according to weight parts, and set aside; the defoamer is BYK-A530 defoamer; the pigment is phthalocyanine blue;

[0059] Step S7: Add hydrophobic light-stable resin, pigment, modified zinc oxide, bentonite, sodium dodecyl sulfate, zinc stearate, carboxymethyl cellulose, defoamer, dicyclohexylmethane diisocyanate, ethyl acetate, anhydrous ethanol and water into a mixer, stir and mix at a temperature of 30°C and a stirring rate of 400 r / min for 20 minutes, then stir and mix at a temperature of 30°C and a stirring rate of 1200 r / min for 30 minutes to obtain a natural texture coating.

[0060] Comparative Example 1:

[0061] This comparative example is a method for preparing a natural texture coating, comprising the following steps:

[0062] Step S1: 10 mmol perfluoropentanoic acid and 0.4 g N, N-dimethylformamide are added to a three-necked flask equipped with a stirrer, a thermometer and a constant pressure dropping funnel, and the mixture is stirred for reaction for 30 min at a temperature of 10° C. and a stirring rate of 400 r / min, and then 25 mmol thionyl chloride is added dropwise while stirring, and the dropping rate is controlled to be 2 drops / s. After the addition is completed, the mixture is heated to 85° C. and the stirring reaction is continued for 3 h. After the reaction is completed, the reaction product is cooled to room temperature, and then added to ice water, and then extracted with dichloromethane for 3 times, the extracts are combined and washed with saturated brine for 3 times, and then dried with anhydrous magnesium sulfate, and then vacuum filtered, and the filtrate is rotary evaporated to remove the solvent to obtain intermediate 1;

[0063] Step S2: 10 mmol of intermediate 1, 13 mmol of N, N-dimethylethylenediamine, 20 mmol of anhydrous potassium carbonate and 50 mL of dichloromethane were added to a three-necked flask equipped with a stirrer, a thermometer and a gas guide tube, and nitrogen was introduced for protection. The mixture was stirred at 0° C. and a stirring rate of 400 r / min for 40 min, and then the temperature was raised to 85° C. and the stirring reaction was continued for 5 h. After the reaction was completed, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation, and then recrystallized from anhydrous acetone to obtain intermediate 2;

[0064] Step S3: 10 mmol of intermediate 2, 13 mmol of potassium hydroxide, 0.2 g of hydroquinone, 10 mmol of 3-bromo-1-propylene and 60 mL of N,N-dimethylformamide were added to a three-necked flask equipped with a stirrer, a thermometer and an air duct, and nitrogen was introduced for protection. The mixture was stirred for reaction at a temperature of 30° C. and a stirring rate of 400 r / min for 30 min, and then the mixture was heated to 110° C. and the stirring reaction was continued for 10 h. After the reaction was completed, the reaction product was cooled to room temperature, and then added to ice ether, and then vacuum filtered. The filter cake was placed in a vacuum drying oven and dried at a temperature of 45° C. for 3 h to obtain a fluorine-containing cationic monomer;

[0065] Step S4: 40g of butyl acrylate, 16g of methyl methacrylate, 9g of fluorine-containing cationic monomer, 5.5g of maleic anhydride and 100mL of xylene are added to a three-necked flask equipped with a stirrer, a thermometer, an air guide tube and a constant pressure dropping funnel, and nitrogen is introduced for protection. The mixture is stirred and reacted for 30min at a temperature of 30°C and a stirring rate of 400r / min. Then, 2g of tert-butyl perbenzoate is added dropwise while stirring under reflux conditions, and the dropping rate is controlled to 2 drops / s. After the dropwise addition is completed, the stirring reaction is continued for 4h, and then 2.7g of 2,2,6,6-tetramethylpiperidinamine is added dropwise while stirring, and the dropping rate is controlled to 2 drops / s. After the dropwise addition is completed, the stirring reaction is continued for 2h. After the reaction is completed, the reaction product is cooled to room temperature, and then added to anhydrous methanol, and then vacuum filtered. The filter cake is placed in a vacuum drying oven and dried at a temperature of 45°C for 5h to obtain a hydrophobic photostable resin;

[0066] Step S5: weigh 50 parts of hydrophobic light-stable resin, 11 parts of pigment, 14 parts of nano zinc oxide, 7 parts of bentonite, 1.2 parts of sodium lauryl sulfate, 5 parts of zinc stearate, 3 parts of carboxymethyl cellulose, 0.7 parts of defoamer, 7 parts of dicyclohexylmethane diisocyanate, 30 parts of ethyl acetate, 22 parts of anhydrous ethanol and 55 parts of water according to weight parts, and set aside; the defoamer is BYK-A530 defoamer; the pigment is phthalocyanine blue;

[0067] Step S6: Add hydrophobic light-stable resin, pigment, nano zinc oxide, bentonite, sodium dodecyl sulfate, zinc stearate, carboxymethyl cellulose, defoamer, dicyclohexylmethane diisocyanate, ethyl acetate, anhydrous ethanol and water into a mixer, stir and mix at a temperature of 30°C and a stirring rate of 400 r / min for 20 minutes, then stir and mix at a temperature of 30°C and a stirring rate of 1200 r / min for 30 minutes to obtain a natural texture coating.

[0068] Comparative Example 2:

[0069] This comparative example is a method for preparing a natural texture coating, comprising the following steps:

[0070] Step S1: 40 g of butyl acrylate, 16 g of methyl methacrylate and 100 mL of xylene are added to a three-necked flask equipped with a stirrer, a thermometer, an air guide tube and a constant pressure dropping funnel, and nitrogen is introduced for protection. The mixture is stirred and reacted for 30 min at a temperature of 30° C. and a stirring rate of 400 r / min. Then, the mixture is heated to reflux and 2 g of tert-butyl perbenzoate is added dropwise while stirring. The dropping rate is controlled to be 2 drops / s. After the addition is completed, the reaction is continued to be stirred for 4 h. After the addition is completed, the reaction is continued to be stirred for 2 h. After the reaction is completed, the reaction product is cooled to room temperature, then added to anhydrous methanol, and then vacuum filtered. The filter cake is placed in a vacuum drying oven and dried at a temperature of 45° C. for 5 h to obtain a polyacrylate resin.

[0071] Step S2: 50 parts of polyacrylate resin, 11 parts of pigment, 7 parts of bentonite, 1.2 parts of sodium lauryl sulfate, 5 parts of zinc stearate, 3 parts of carboxymethyl cellulose, 0.7 parts of defoamer, 7 parts of dicyclohexylmethane diisocyanate, 30 parts of ethyl acetate, 22 parts of anhydrous ethanol and 55 parts of water are weighed according to weight parts and set aside; the defoamer is BYK-A530 defoamer; the pigment is phthalocyanine blue;

[0072] Step S3: Add polyacrylate resin, pigment, bentonite, sodium dodecyl sulfate, zinc stearate, carboxymethyl cellulose, defoamer, dicyclohexylmethane diisocyanate, ethyl acetate, anhydrous ethanol and water into a mixer, stir and mix at a temperature of 30°C and a stirring rate of 400 r / min for 20 minutes, then stir and mix at a temperature of 30°C and a stirring rate of 1200 r / min for 30 minutes to obtain a natural texture coating.

[0073] Comparative Example 3:

[0074] This comparative example is a method for preparing a natural texture coating, comprising the following steps:

[0075] Step S1: 40g of butyl acrylate, 16g of methyl methacrylate, 5.5g of maleic anhydride and 100mL of xylene are added to a three-necked flask equipped with a stirrer, a thermometer, an air guide tube and a constant pressure dropping funnel, and nitrogen is introduced for protection. The mixture is stirred and reacted for 30min at a temperature of 30°C and a stirring rate of 400r / min. Then, 2g of tert-butyl perbenzoate is added dropwise while stirring under reflux conditions. After the addition is completed, the stirring reaction is continued for 4h. Then, 2.7g of 2,2,6,6-tetramethylpiperidinamine is added dropwise while stirring, and the dropping rate is controlled to 2 drops / s. After the addition is completed, the stirring reaction is continued for 2h. After the reaction is completed, the reaction product is cooled to room temperature, and then added to anhydrous methanol, and then vacuum filtered. The filter cake is placed in a vacuum drying oven and dried at a temperature of 45°C for 5h to obtain a light-stable resin;

[0076] Step S2: weigh 50 parts of light-stabilizing resin, 11 parts of pigment, 7 parts of bentonite, 1.2 parts of sodium dodecyl sulfate, 5 parts of zinc stearate, 3 parts of carboxymethyl cellulose, 0.7 parts of defoamer, 7 parts of dicyclohexylmethane diisocyanate, 30 parts of ethyl acetate, 22 parts of anhydrous ethanol and 55 parts of water according to weight parts, and set aside; the defoamer is BYK-A530 defoamer; the pigment is phthalocyanine blue;

[0077] Step S3: Add light-stable resin, pigment, bentonite, sodium dodecyl sulfate, zinc stearate, carboxymethyl cellulose, defoamer, dicyclohexylmethane diisocyanate, ethyl acetate, anhydrous ethanol and water into a mixer, stir and mix at a temperature of 30°C and a stirring rate of 400 r / min for 20 minutes, then stir and mix at a temperature of 30°C and a stirring rate of 1200 r / min for 30 minutes to obtain a natural texture coating.

[0078] Comparative Example 4:

[0079] This comparative example is a method for preparing a natural texture coating, comprising the following steps:

[0080] Step S1: 10 mmol perfluoropentanoic acid and 0.4 g N, N-dimethylformamide are added to a three-necked flask equipped with a stirrer, a thermometer and a constant pressure dropping funnel, and the mixture is stirred for reaction for 30 min at a temperature of 10° C. and a stirring rate of 400 r / min, and then 25 mmol thionyl chloride is added dropwise while stirring, and the dropping rate is controlled to be 2 drops / s. After the addition is completed, the mixture is heated to 85° C. and the stirring reaction is continued for 3 h. After the reaction is completed, the reaction product is cooled to room temperature, and then added to ice water, and then extracted with dichloromethane for 3 times, the extracts are combined and washed with saturated brine for 3 times, and then dried with anhydrous magnesium sulfate, and then vacuum filtered, and the filtrate is rotary evaporated to remove the solvent to obtain intermediate 1;

[0081] Step S2: 10 mmol of intermediate 1, 13 mmol of N, N-dimethylethylenediamine, 20 mmol of anhydrous potassium carbonate and 50 mL of dichloromethane were added to a three-necked flask equipped with a stirrer, a thermometer and a gas guide tube, and nitrogen was introduced for protection. The mixture was stirred at 0° C. and a stirring rate of 400 r / min for 40 min, and then the temperature was raised to 85° C. and the stirring reaction was continued for 5 h. After the reaction was completed, the reaction product was cooled to room temperature, and then the solvent was removed by rotary evaporation, and then recrystallized from anhydrous acetone to obtain intermediate 2;

[0082] Step S3: 10 mmol of intermediate 2, 13 mmol of potassium hydroxide, 0.2 g of hydroquinone, 10 mmol of 3-bromo-1-propylene and 60 mL of N,N-dimethylformamide were added to a three-necked flask equipped with a stirrer, a thermometer and an air duct, and nitrogen was introduced for protection. The mixture was stirred for reaction at a temperature of 30° C. and a stirring rate of 400 r / min for 30 min, and then the mixture was heated to 110° C. and the stirring reaction was continued for 10 h. After the reaction was completed, the reaction product was cooled to room temperature, and then added to ice ether, and then vacuum filtered. The filter cake was placed in a vacuum drying oven and dried at a temperature of 45° C. for 3 h to obtain a fluorine-containing cationic monomer;

[0083] Step S4: 40 g of butyl acrylate, 16 g of methyl methacrylate, 9 g of fluorinated cationic monomer and 100 mL of xylene are added to a three-necked flask equipped with a stirrer, a thermometer, an air guide tube and a constant pressure dropping funnel, and nitrogen is introduced for protection. The mixture is stirred and reacted for 30 min at a temperature of 30° C. and a stirring rate of 400 r / min. Then, the mixture is heated to reflux and 2 g of tert-butyl perbenzoate is added dropwise while stirring. The dropping rate is controlled to 2 drops / s. After the addition is completed, the stirring reaction is continued for 4 h. After the reaction is completed, the reaction product is cooled to room temperature, then added to anhydrous methanol, and then vacuum filtered. The filter cake is placed in a vacuum drying oven and dried at a temperature of 45° C. for 5 h to obtain a hydrophobic resin;

[0084] Step S5: weigh 50 parts of hydrophobic resin, 11 parts of pigment, 7 parts of bentonite, 1.2 parts of sodium lauryl sulfate, 5 parts of zinc stearate, 3 parts of carboxymethyl cellulose, 0.7 parts of defoamer, 7 parts of dicyclohexylmethane diisocyanate, 30 parts of ethyl acetate, 22 parts of anhydrous ethanol and 55 parts of water according to weight parts, and set aside; the defoamer is BYK-A530 defoamer; the pigment is phthalocyanine blue;

[0085] Step S6: Add hydrophobic resin, pigment, bentonite, sodium dodecyl sulfate, zinc stearate, carboxymethyl cellulose, defoaming agent, dicyclohexylmethane diisocyanate, ethyl acetate, anhydrous ethanol and water into a mixer, stir and mix at a temperature of 30°C and a stirring rate of 400 r / min for 20 minutes, then stir and mix at a temperature of 30°C and a stirring rate of 1200 r / min for 30 minutes to obtain a natural texture coating.

[0086] The natural texture coatings of Examples 1-3 and Comparative Examples 1-4 were sprayed onto the surface of the wooden products that had been dusted and polished, with a coating amount of 100 g / m 2After that, the coating is cured to form a coating. After 24 hours, the coating is tested for performance. The test items are to evaluate the antibacterial performance using the antibacterial rate of Staphylococcus aureus, to evaluate the hydrophobic and anti-fouling performance using the water contact angle, and to evaluate the anti-aging and yellowing performance using the light retention rate. The test results are shown in the following table:

[0087] sample Staphylococcus aureus inhibition rate, % Water contact angle,° Gloss retention rate, % Example 1 97.9 149.1 85.4 Example 2 98.5 151.6 87.8 Example 3 99.3 153.0 90.2 Comparative Example 1 98.2 146.5 84.7 Comparative Example 2 42.7 119.5 60.2 Comparative Example 3 50.9 116.7 79.5 Comparative Example 4 90.1 149.8 71.6

[0088] Among them, the gloss retention rate test method is: perform artificial accelerated aging test according to ISO 11507 method, ultraviolet irradiation for 4 hours, wet heat for 4 hours, repeat the cycle for 1500 hours, wash the sample with distilled water, dry it and test the gloss, and calculate the gloss retention rate of the sample.

[0089] Referring to the data in the above table, based on the comparison between Examples 1-3 and Comparative Examples 1-4, it can be known that the natural texture coating of the present application has excellent antibacterial properties, hydrophobic and stain-resistant properties, and anti-aging and yellowing properties.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0091] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined in this application, they shall all fall within the protection scope of the present invention.

Claims

1. A natural texture coating, characterized in that: It comprises the following components in parts by weight: 40-50 parts of hydrophobic light-stable resin, 3-11 parts of pigment, 2-14 parts of modified zinc oxide, 3-7 parts of bentonite, 0.8-1.2 parts of sodium lauryl sulfate, 1-5 parts of zinc stearate, 1-3 parts of carboxymethyl cellulose, 0.3-0.7 parts of defoaming agent, 2-7 parts of dicyclohexylmethane diisocyanate, 20-30 parts of ethyl acetate, 18-22 parts of anhydrous ethanol and 45-55 parts of water; Wherein, the hydrophobic light-stable resin is prepared by the following steps: Step a1: stirring perfluoropentanoic acid and N,N-dimethylformamide for reaction, then adding thionyl chloride dropwise while stirring, continuing to stir the reaction after the addition is complete, cooling the reaction product after the reaction is complete, then adding it into ice water, then extracting it with dichloromethane, combining the extracts, washing them, drying them, and then vacuum filtering, and rotary evaporating the filtrate to obtain intermediate 1; Step a2: stirring the intermediate 1, N,N-dimethylethylenediamine, anhydrous potassium carbonate and dichloromethane for reaction, cooling the reaction product after the reaction is completed, then rotary evaporating, and then recrystallizing to obtain the intermediate 2; Step a3: stirring the intermediate 2, potassium hydroxide, hydroquinone, 3-bromo-1-propylene and N,N-dimethylformamide for reaction, cooling the reaction product after the reaction, then adding it into icy ether, and then vacuum filtering, drying the filter cake to obtain a fluorine-containing cationic monomer; Step a4: stirring butyl acrylate, methyl methacrylate, fluorine-containing cationic monomer, maleic anhydride and xylene for reaction, then adding tert-butyl perbenzoate and 2,2,6,6-tetramethylpiperidinamine dropwise while stirring, and continuing to stir the reaction after the addition is complete. After the reaction is completed, the reaction product is cooled and then added to anhydrous methanol, followed by vacuum filtration, and the filter cake is dried to obtain a hydrophobic light-stable resin.

2. The natural texture coating according to claim 1, characterized in that: The usage ratio of the perfluoropentanoic acid, N,N-dimethylformamide and thionyl chloride in step a1 is 10 mmol: 0.2-0.4 g: 22-25 mmol.

3. The natural texture coating according to claim 1, characterized in that: The usage ratio of the intermediate 1, N,N-dimethylethylenediamine, anhydrous potassium carbonate and dichloromethane in step a2 is 10mmol:11-13mmol:15-20mmol:40-50mL.

4. The natural texture coating according to claim 1, characterized in that: The usage ratio of the intermediate 2, potassium hydroxide, hydroquinone, 3-bromo-1-propylene and N,N-dimethylformamide in step a3 is 10 mmol: 11-13 mmol: 0.1-0.2 g: 10 mmol: 50-60 mL.

5. The natural texture coating according to claim 1, characterized in that: The usage ratio of the butyl acrylate, methyl methacrylate, fluorine-containing cationic monomer, maleic anhydride, xylene, tert-butyl perbenzoate and 2,2,6,6-tetramethylpiperidinamine in step a4 is 30-40g:10-16g:1-9g:0.5-5.5g:80-100mL:1-2g:0.3-2.7g.

6. The natural texture paint according to claim 1, characterized in that: The modified zinc oxide is prepared by the following steps: Nano zinc oxide, anhydrous ethanol and deionized water are stirred for reaction, and then a modifier is added and the stirring reaction is continued. After the reaction is completed, the reaction product is cooled and then centrifuged, and the precipitate is washed and dried to obtain modified zinc oxide.

7. The natural texture coating according to claim 6, characterized in that: The dosage ratio of the nano zinc oxide, anhydrous ethanol, deionized water and modifier is 10g:80-85mL:8-10mL:3-7g; the modifier is one of titanate coupling agent NDZ-101, titanate coupling agent NDZ-201 and titanate coupling agent NDZ-311.

8. A method for preparing a coating imitating natural texture, characterized in that: The following steps are involved: Step 1: Weigh 40-50 parts of hydrophobic light-stable resin, 3-11 parts of pigment, 2-14 parts of modified zinc oxide, 3-7 parts of bentonite, 0.8-1.2 parts of sodium lauryl sulfate, 1-5 parts of zinc stearate, 1-3 parts of carboxymethyl cellulose, 0.3-0.7 parts of defoaming agent, 2-7 parts of dicyclohexylmethane diisocyanate, 20-30 parts of ethyl acetate, 18-22 parts of anhydrous ethanol and 45-55 parts of water according to weight parts, and set aside; Step 2: Add hydrophobic light-stable resin, pigment, modified zinc oxide, bentonite, sodium dodecyl sulfate, zinc stearate, carboxymethyl cellulose, defoamer, dicyclohexylmethane diisocyanate, ethyl acetate, anhydrous ethanol and water into a mixer, stir and mix for 10-20 minutes at a temperature of 25-30°C and a stirring rate of 300-400r / min, then stir and mix for 20-30 minutes at a temperature of 25-30°C and a stirring rate of 1000-1200r / min to obtain a natural texture coating.

9. The method for preparing a natural texture coating according to claim 8, characterized in that: The defoamer includes one of BYK-028 defoamer, BYK-141 defoamer and BYK-A530 defoamer, or a mixture of two or more thereof in any proportion; the pigment includes one of Pigment Brown 23, Pigment Yellow 138, Aniline Black, Phthalocyanine Blue, Pigment Red 254, Pigment Red 122, Permanent Yellow GR and Pigment Brown 25, or a mixture of two or more thereof in any proportion.

10. A method for using a natural texture paint, characterized in that: The following steps are involved: Remove dust from the wood products, polish them flat, and then evenly apply the natural texture paint on the surface of the wood products by brushing, rolling or spraying. The coating amount is 80-120g / m 2 , and then cured to form a coating.