A preparation process for coating for improving antibacterial and corrosion resistance of wood

Abstract

The invention relates to the technical field of wood antiseptic and corrosion-resistant treatment, and specifically to a preparation process of a coating for improving the antibacterial and corrosion-resistant performance of wood. In order to improve the antibacterial and corrosion-resistant ability of the prepared coating, the invention prepares and adds a corrosion-resistant antibacterial agent in a coating raw material, and introduces group structures such as quaternary ammonium salts and guanidine groups therein, thereby achieving antibacterial performance against microorganisms such as fungi, and the application also introduces fluorine elements and allyl groups therein. The introduction of fluorine elements can effectively improve the hydrophobicity of the coating, reduce the influence of water vapor on the antibacterial components in the coating, and the introduction of allyl groups can enable the corrosion-resistant antibacterial agent to react and cross-link with raw materials such as butyl acrylate under the action of an initiator, thereby effectively avoiding the loss of the corrosion-resistant antibacterial agent and maintaining the antibacterial activity for a long time.

Description

Technical Field

[0001] The invention relates to the technical field of wood antiseptic and corrosion-resistant treatment, in particular to a preparation process of a coating for improving the antibacterial and corrosion-resistant performance of wood. Background Art

[0002] As a natural polymer material, wood has been used in building materials and decoration for thousands of years. Compared with materials such as stone and cement, wood has a high strength-to-weight ratio, good impact resistance and is easy to process. It is a high-quality material that is both strong and light. However, due to the nature of wood itself, wood is easily decayed by microorganisms, which in turn causes the performance of wood to decline, causing it to decay and deteriorate, seriously affecting the service life of wood and its products.

[0003] At present, the industry often applies preservatives to the surface of wood to achieve the purpose of antibacterial and corrosion resistance of wood. However, most of the current preservatives are not water-resistant and have poor anti-loss performance. For example, although patents CN201610361632.X and CN200510030580.X both disclose wood preservatives, which have the advantage of broad-spectrum antibacterial properties, their anti-loss performance is poor. Therefore, it is necessary to improve such defects in order to achieve the purpose of long-term antibacterial and corrosion resistance of wood. Summary of the invention

[0004] The purpose of the present invention is to provide a preparation process of a coating for improving the antibacterial and corrosion-resistant properties of wood, so as to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solution: a preparation process of a coating for improving the antibacterial and corrosion resistance of wood, comprising the following steps:

[0006] After nitrogen is introduced into deionized water for 2-5 minutes, nitrogen atmosphere is used for protection, an emulsifier is added to the deionized water, and after mixing for 1-3 minutes, methyl methacrylate, butyl acrylate, isooctyl acrylate and a corrosion-resistant antibacterial agent are added and stirred for 3-5 minutes to obtain an acrylic acid mixed monomer; the acrylic acid mixed monomer is divided into two equal parts, the first part of the acrylic acid mixed monomer is heated to 75-85° C., the first part of the initiator is added dropwise for 45-80 minutes, after the addition is completed, the temperature is increased to 85-90° C., stirring and reacting is continued for 90-180 minutes, the second part of the mixed acrylic acid mixed monomer is added, the mixing reaction is continued for 5-10 minutes, the second part of the initiator is added dropwise for 30-60 minutes, after the addition is completed, the heat is kept for reaction for 2-4 hours, the heating is stopped, and the coating is emulsified by high-speed stirring to obtain the coating.

[0007] Furthermore, the preparation process of the corrosion-resistant antibacterial agent comprises the following steps:

[0008] Add 2,2-difluoromalonic acid and deionized water to the reaction container, mix well, add p-toluenesulfonic acid, mix for 1-3 minutes, add N,N-dimethylethanolamine dropwise, the addition time is 1-4 hours, and the temperature of the reaction system is controlled to be 85-90°C during the addition. After the addition is completed, continue to heat to 95-98°C, keep the temperature for reaction for 2-4 hours, add 1-bromodecane dropwise, continue to react for 2-4 hours, remove excess solvent by rotary evaporation, and use DMF solvent to obtain the mixture. The dried product was dissolved and added dropwise to a DMF solution containing diethylenetriamine for 1-1.5 hours. During the addition, the temperature of the reaction system was controlled to be 85-120°C. After the addition was completed, the temperature was continued to rise to 120-130°C. After stirring for 0.5-1 hour, the mixture was cooled to room temperature, dicyandiamide was added, the temperature was raised to 78-80°C, the reaction was continued for 2-4 hours, allyl acetic acid was added, the reaction was continued for 0.5-1 hour, and the excess solvent was removed by rotary evaporation to obtain a corrosion-resistant antibacterial agent.

[0009] Furthermore, the coating is composed of 0.5-1 parts of emulsifier, 70-100 parts of deionized water, 15-28 parts of methyl methacrylate, 16-30 parts of butyl acrylate, 5-8 parts of isooctyl acrylate, 2-5 parts of corrosion resistant antibacterial agent and 0.8-1.5 parts of initiator in parts by weight.

[0010] Furthermore, the mass ratio of the first initiator to the second initiator is (1-2):1.

[0011] Furthermore, in terms of weight, the mass ratio of the 2,2-difluoromalonic acid, p-toluenesulfonic acid and N,N-dimethylethanolamine is 10:(0.15-0.3):(5-6.5).

[0012] Furthermore, in parts by weight, the mass ratio of the 2,2-difluoromalonic acid to 1-bromodecane is 10:(10-16).

[0013] Furthermore, in parts by weight, the mass ratio of the dried product, diethylenetriamine and dicyandiamide is 10:(2-2.4):(1.5-2).

[0014] Furthermore, in parts by weight, the mass ratio of the dried product to allyl acetic acid is 10:(1.5-2).

[0015] Furthermore, the coating is applied to wood antibacterial and antiseptic properties by vacuum impregnation, which specifically includes the following processes:

[0016] After the wood is dried, it is evacuated for 10-30 minutes with a vacuum degree of 0.08-0.1MPa. After the evacuation is completed, it is immersed in the coating and pressurized to 1.5-2MPa. After pressurized immersion for 30-45 minutes, it is taken out and heated to 105-110℃ for drying for 6-8 hours.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In order to improve the antibacterial and corrosion-resistant ability of the prepared coating, the present invention prepares and adds a corrosion-resistant antibacterial agent to the coating raw material. The present invention first uses 2,2-difluoromalonic acid as a raw material, which contains a highly electronegative fluorine element. The introduction of the fluorine element can effectively reduce the surface energy of the material, inhibit the adsorption of microbial fungal spores on the wood surface, thereby reducing the probability of fungal corrosion. At the same time, the introduction of the fluorine element can also effectively improve the surface hydrophobicity of the coating after drying, avoid the dissolution of the antibacterial components therein due to the erosion of water vapor, thereby maintaining the antibacterial and corrosion-resistant effect for a long time.

[0019] The present invention utilizes 2,2-difluoromalonic acid to react with N,N-dimethylethanolamine, thereby introducing a carboxyl group into the N,N-dimethylethanolamine chain segment, and on this basis, the N,N-dimethylethanolamine is mixed with 1-bromodecane for reaction, thereby realizing quaternary ammonium salt treatment of the N,N-dimethylethanolamine, and the N,N-dimethylethanolamine is dried and reacted with diethylenetriamine again, and after the amino group is introduced into the reaction chain segment again, dicyandiamide is added, and the amino group acts as a nucleophilic agent to attack the cyano group, thereby introducing a guanidine group into the chain segment, and the guanidine group and the quaternary ammonium salt both have strong antibacterial properties, can be combined with the cell membrane of fungi, thereby affecting the life activities of the fungi, and inhibiting the reproduction and growth of the fungi, thereby realizing antibacterial properties;

[0020] And on this basis, in order to avoid the dissolution of antibacterial components, the present invention also uses allyl acetic acid when preparing the corrosion-resistant antibacterial agent; by controlling the amount of dicyandiamide and diethylenetriamine when reacting with the dry product, sufficient amino groups are retained therein, and the amino groups are mixed with allyl acetic acid with a carboxyl group to react, thereby introducing allyl groups into the corrosion-resistant antibacterial agent. The introduction of allyl groups can give the corrosion-resistant antibacterial agent the ability to react and cross-link with raw materials such as butyl acrylate under the action of an initiator, thereby effectively avoiding the loss of the corrosion-resistant antibacterial agent and maintaining the antibacterial activity for a long time. DETAILED DESCRIPTION

[0021] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

[0022] In the present application, the initiator used is potassium persulfate.

[0023] Example 1. A process for preparing a coating for improving the antibacterial and corrosion resistance of wood, comprising the following steps:

[0024] By weight, nitrogen was introduced into 85 parts of deionized water for 5 minutes, and then 0.8 parts of emulsifier was added to the deionized water under nitrogen atmosphere protection. After mixing for 3 minutes, 20 parts of methyl methacrylate, 25 parts of butyl acrylate, 8 parts of isooctyl acrylate and 2 parts of corrosion-resistant antibacterial agent were added, and stirred for 3 minutes to obtain an acrylic acid mixed monomer;

[0025] The acrylic acid mixed monomer was divided into two equal parts, the first part of the acrylic acid mixed monomer was heated to 78°C, 0.7 parts of initiator were added dropwise for 80 minutes, after the addition was completed, the temperature was raised to 85°C, stirring and reacting for 120 minutes, the second part of the acrylic acid mixed monomer was added, the mixing reaction was continued for 5 minutes, and 0.7 parts of initiator were added dropwise again for 45 minutes, after the addition was completed, the reaction was kept warm for 3 hours, the heating was stopped, and the coating was emulsified by high-speed stirring to obtain the coating;

[0026] The preparation process of the corrosion-resistant antibacterial agent comprises the following steps:

[0027] In parts by weight, 10 parts of 2,2-difluoromalonic acid and deionized water were added to a reaction container, and after mixing evenly, 0.2 parts of p-toluenesulfonic acid was added thereto. After mixing for 3 minutes, 5 parts of N,N-dimethylethanolamine were added dropwise thereto for 3 hours. During the addition, the temperature of the reaction system was controlled to be 85-90°C. After the addition was completed, the temperature was continued to be raised to 96°C. After the reaction was kept warm for 3 hours, 10 parts of 1-bromodecane were added dropwise thereto. After the reaction was continued for 3 hours, the excess solvent was removed by rotary evaporation to obtain a dry product.

[0028] Use DMF to dissolve 10 parts of the dry product and add it dropwise into a DMF solution containing 2 parts of diethylenetriamine. The addition time is 1 hour. During the addition process, the temperature of the reaction system is controlled at 115-120°C. After the addition is completed, continue to heat up to 125°C, stir and react for 0.5 hours, cool to room temperature, add 1.5 parts of dicyandiamide, heat to 80°C, react for 3 hours, add 1.5 parts of allyl acetic acid, continue to react for 1 hour, and remove excess solvent by rotary evaporation to obtain a corrosion-resistant antibacterial agent.

[0029] Example 2. A process for preparing a coating for improving the antibacterial and corrosion resistance of wood, comprising the following steps:

[0030] Compared with Example 1, the amount of corrosion-resistant antibacterial agent added in this example is increased;

[0031] By weight, nitrogen was introduced into 85 parts of deionized water for 5 minutes, and then 0.8 parts of emulsifier was added to the deionized water under nitrogen atmosphere protection. After mixing for 3 minutes, 20 parts of methyl methacrylate, 25 parts of butyl acrylate, 8 parts of isooctyl acrylate and 5 parts of corrosion-resistant antibacterial agent were added. After stirring for 3 minutes, an acrylic acid mixed monomer was obtained.

[0032] The acrylic acid mixed monomer was divided into two equal parts, the first part of the acrylic acid mixed monomer was heated to 78°C, 0.7 parts of initiator were added dropwise for 80 minutes, after the addition was completed, the temperature was raised to 85°C, stirring and reacting for 120 minutes, the second part of the acrylic acid mixed monomer was added, the mixing reaction was continued for 5 minutes, and 0.7 parts of initiator were added dropwise again for 45 minutes, after the addition was completed, the reaction was kept warm for 3 hours, the heating was stopped, and the coating was emulsified by high-speed stirring to obtain the coating;

[0033] The preparation process of the corrosion-resistant antibacterial agent comprises the following steps:

[0034] In parts by weight, 10 parts of 2,2-difluoromalonic acid and deionized water were added to a reaction container, and after mixing evenly, 0.2 parts of p-toluenesulfonic acid was added thereto. After mixing for 3 minutes, 5 parts of N,N-dimethylethanolamine were added dropwise thereto for 3 hours. During the addition, the temperature of the reaction system was controlled to be 85-90°C. After the addition was completed, the temperature was continued to be raised to 96°C. After the reaction was kept warm for 3 hours, 10 parts of 1-bromodecane were added dropwise thereto. After the reaction was continued for 3 hours, the excess solvent was removed by rotary evaporation to obtain a dry product.

[0035] Use DMF to dissolve 10 parts of the dry product and add it dropwise into a DMF solution containing 2 parts of diethylenetriamine. The addition time is 1 hour. During the addition process, the temperature of the reaction system is controlled at 115-120°C. After the addition is completed, continue to heat up to 125°C, stir and react for 0.5 hours, cool to room temperature, add 1.5 parts of dicyandiamide, heat to 80°C, react for 3 hours, add 1.5 parts of allyl acetic acid, continue to react for 1 hour, and remove excess solvent by rotary evaporation to obtain a corrosion-resistant antibacterial agent.

[0036] Example 3. A process for preparing a coating for improving the antibacterial and corrosion resistance of wood, comprising the following steps:

[0037] Compared with Example 1, the amount of N,N-dimethylethanolamine added in this example is increased;

[0038] By weight, nitrogen was introduced into 85 parts of deionized water for 5 minutes, and then 0.8 parts of emulsifier was added to the deionized water under nitrogen atmosphere protection. After mixing for 3 minutes, 20 parts of methyl methacrylate, 25 parts of butyl acrylate, 8 parts of isooctyl acrylate and 2 parts of corrosion-resistant antibacterial agent were added, and stirred for 3 minutes to obtain an acrylic acid mixed monomer;

[0039] The acrylic acid mixed monomer was divided into two equal parts, the first part of the acrylic acid mixed monomer was heated to 78°C, 0.7 parts of initiator were added dropwise for 80 minutes, after the addition was completed, the temperature was raised to 85°C, stirring and reacting for 120 minutes, the second part of the acrylic acid mixed monomer was added, the mixing reaction was continued for 5 minutes, and 0.7 parts of initiator were added dropwise again for 45 minutes, after the addition was completed, the reaction was kept warm for 3 hours, the heating was stopped, and the coating was emulsified by high-speed stirring to obtain the coating;

[0040] The preparation process of the corrosion-resistant antibacterial agent comprises the following steps:

[0041] In parts by weight, 10 parts of 2,2-difluoromalonic acid and deionized water were added to a reaction container, and after mixing evenly, 0.2 parts of p-toluenesulfonic acid was added thereto. After mixing for 3 minutes, 6.5 parts of N,N-dimethylethanolamine were added thereto dropwise for 3 hours. During the addition, the temperature of the reaction system was controlled to be 85-90°C. After the addition was completed, the temperature was continued to rise to 96°C. After the reaction was kept warm for 3 hours, 10 parts of 1-bromodecane were added thereto dropwise. After the reaction was continued for 3 hours, the excess solvent was removed by rotary evaporation to obtain a dry product.

[0042] Use DMF to dissolve 10 parts of the dry product and add it dropwise into a DMF solution containing 2 parts of diethylenetriamine. The addition time is 1 hour. During the addition process, the temperature of the reaction system is controlled at 115-120°C. After the addition is completed, continue to heat up to 125°C, stir and react for 0.5 hours, cool to room temperature, add 1.5 parts of dicyandiamide, heat to 80°C, react for 3 hours, add 1.5 parts of allyl acetic acid, continue to react for 1 hour, and remove excess solvent by rotary evaporation to obtain a corrosion-resistant antibacterial agent.

[0043] Example 4. A process for preparing a coating for improving the antibacterial and corrosion resistance of wood, comprising the following steps:

[0044] Compared with Example 3, the amount of 1-bromodecane added in this example is increased;

[0045] By weight, nitrogen was introduced into 85 parts of deionized water for 5 minutes, and then 0.8 parts of emulsifier was added to the deionized water under nitrogen atmosphere protection. After mixing for 3 minutes, 20 parts of methyl methacrylate, 25 parts of butyl acrylate, 8 parts of isooctyl acrylate and 2 parts of corrosion-resistant antibacterial agent were added, and stirred for 3 minutes to obtain an acrylic acid mixed monomer;

[0046] The acrylic acid mixed monomer was divided into two equal parts, the first part of the acrylic acid mixed monomer was heated to 78°C, 0.7 parts of initiator were added dropwise for 80 minutes, after the addition was completed, the temperature was raised to 85°C, stirring and reacting for 120 minutes, the second part of the acrylic acid mixed monomer was added, the mixing reaction was continued for 5 minutes, and 0.7 parts of initiator were added dropwise again for 45 minutes, after the addition was completed, the reaction was kept warm for 3 hours, the heating was stopped, and the coating was emulsified by high-speed stirring to obtain the coating;

[0047] The preparation process of the corrosion-resistant antibacterial agent comprises the following steps:

[0048] In parts by weight, 10 parts of 2,2-difluoromalonic acid and deionized water were added to a reaction container, and after mixing evenly, 0.2 parts of p-toluenesulfonic acid was added thereto. After mixing for 3 minutes, 6.5 parts of N,N-dimethylethanolamine were added thereto dropwise for 3 hours. During the addition, the temperature of the reaction system was controlled to be 85-90°C. After the addition was completed, the temperature was continued to rise to 96°C. After the reaction was kept warm for 3 hours, 16 parts of 1-bromodecane were added thereto dropwise. After the reaction was continued for 3 hours, the excess solvent was removed by rotary evaporation to obtain a dry product.

[0049] Use DMF to dissolve 10 parts of the dry product and add it dropwise into a DMF solution containing 2 parts of diethylenetriamine. The addition time is 1 hour. During the addition process, the temperature of the reaction system is controlled at 115-120°C. After the addition is completed, continue to heat up to 125°C, stir and react for 0.5 hours, cool to room temperature, add 1.5 parts of dicyandiamide, heat to 80°C, react for 3 hours, add 1.5 parts of allyl acetic acid, continue to react for 1 hour, and remove excess solvent by rotary evaporation to obtain a corrosion-resistant antibacterial agent.

[0050] Example 5. A process for preparing a coating for improving the antibacterial and corrosion resistance of wood, comprising the following steps:

[0051] Compared with Example 4, the amount of dicyandiamide added in this example is increased;

[0052] By weight, nitrogen was introduced into 85 parts of deionized water for 5 minutes, and then 0.8 parts of emulsifier was added to the deionized water under nitrogen atmosphere protection. After mixing for 3 minutes, 20 parts of methyl methacrylate, 25 parts of butyl acrylate, 8 parts of isooctyl acrylate and 2 parts of corrosion-resistant antibacterial agent were added, and stirred for 3 minutes to obtain an acrylic acid mixed monomer;

[0053] The acrylic acid mixed monomer was divided into two equal parts, the first part of the acrylic acid mixed monomer was heated to 78°C, 0.7 parts of initiator were added dropwise for 80 minutes, after the addition was completed, the temperature was raised to 85°C, stirring and reacting for 120 minutes, the second part of the acrylic acid mixed monomer was added, the mixing reaction was continued for 5 minutes, and 0.7 parts of initiator were added dropwise again for 45 minutes, after the addition was completed, the reaction was kept warm for 3 hours, the heating was stopped, and the coating was emulsified by high-speed stirring to obtain the coating;

[0054] The preparation process of the corrosion-resistant antibacterial agent comprises the following steps:

[0055] In parts by weight, 10 parts of 2,2-difluoromalonic acid and deionized water were added to a reaction container, and after mixing evenly, 0.2 parts of p-toluenesulfonic acid was added thereto. After mixing for 3 minutes, 6.5 parts of N,N-dimethylethanolamine were added thereto dropwise for 3 hours. During the addition, the temperature of the reaction system was controlled to be 85-90°C. After the addition was completed, the temperature was continued to rise to 96°C. After the reaction was kept warm for 3 hours, 16 parts of 1-bromodecane were added thereto dropwise. After the reaction was continued for 3 hours, the excess solvent was removed by rotary evaporation to obtain a dry product.

[0056] Use DMF to dissolve 10 parts of the dry product and add it dropwise into a DMF solution containing 2 parts of diethylenetriamine. The addition time is 1 hour. During the addition process, the temperature of the reaction system is controlled at 115-120°C. After the addition is completed, continue to heat up to 125°C, stir and react for 0.5 hours, cool to room temperature, add 2 parts of dicyandiamide, heat up to 80°C, react for 3 hours, add 1.5 parts of allyl acetic acid, continue to react for 1 hour, and remove excess solvent by rotary evaporation to obtain a corrosion-resistant antibacterial agent.

[0057] Example 6. A process for preparing a coating for improving the antibacterial and corrosion resistance of wood, comprising the following steps:

[0058] Compared with Example 5, the amount of allyl acetic acid added in this example is increased;

[0059] By weight, nitrogen was introduced into 85 parts of deionized water for 5 minutes, and then 0.8 parts of emulsifier was added to the deionized water under nitrogen atmosphere protection. After mixing for 3 minutes, 20 parts of methyl methacrylate, 25 parts of butyl acrylate, 8 parts of isooctyl acrylate and 2 parts of corrosion-resistant antibacterial agent were added, and stirred for 3 minutes to obtain an acrylic acid mixed monomer;

[0060] The acrylic acid mixed monomer was divided into two equal parts, the first part of the acrylic acid mixed monomer was heated to 78°C, 0.7 parts of initiator were added dropwise for 80 minutes, after the addition was completed, the temperature was raised to 85°C, stirring and reacting for 120 minutes, the second part of the acrylic acid mixed monomer was added, the mixing reaction was continued for 5 minutes, and 0.7 parts of initiator were added dropwise again for 45 minutes, after the addition was completed, the reaction was kept warm for 3 hours, the heating was stopped, and the coating was emulsified by high-speed stirring to obtain the coating;

[0061] The preparation process of the corrosion-resistant antibacterial agent comprises the following steps:

[0062] In parts by weight, 10 parts of 2,2-difluoromalonic acid and deionized water were added to a reaction container, and after mixing evenly, 0.2 parts of p-toluenesulfonic acid was added thereto. After mixing for 3 minutes, 6.5 parts of N,N-dimethylethanolamine were added thereto dropwise for 3 hours. During the addition, the temperature of the reaction system was controlled to be 85-90°C. After the addition was completed, the temperature was continued to rise to 96°C. After the reaction was kept warm for 3 hours, 16 parts of 1-bromodecane were added thereto dropwise. After the reaction was continued for 3 hours, the excess solvent was removed by rotary evaporation to obtain a dry product.

[0063] Use DMF to dissolve 10 parts of the dry product and add it dropwise into a DMF solution containing 2 parts of diethylenetriamine. The addition time is 1 hour. During the addition, the temperature of the reaction system is controlled at 115-120°C. After the addition is completed, continue to heat up to 125°C. After stirring for 0.5 hours, cool to room temperature, add 2 parts of dicyandiamide, heat up to 80°C, react for 3 hours, add 2 parts of allyl acetic acid, continue to react for 1 hour, and remove excess solvent by rotary evaporation to obtain a corrosion-resistant antibacterial agent.

[0064] Comparative Example 1. A process for preparing a coating for improving the antibacterial and corrosion resistance of wood, comprising the following steps:

[0065] Compared with Example 1, no corrosion-resistant antibacterial agent was prepared in this comparative example;

[0066] By weight, nitrogen was introduced into 85 parts of deionized water for 5 minutes, and then 0.8 parts of emulsifier was added to the deionized water under nitrogen atmosphere protection. After mixing for 3 minutes, 20 parts of methyl methacrylate, 25 parts of butyl acrylate, and 8 parts of isooctyl acrylate were added, and stirred for 3 minutes to obtain an acrylic acid mixed monomer;

[0067] The acrylic acid mixed monomer was divided into two equal parts, the first part of the acrylic acid mixed monomer was heated to 78°C, 0.7 parts of initiator were added dropwise for 80 minutes, after the addition was completed, the temperature was raised to 85°C, stirring and reacting for 120 minutes, the second part of the mixed acrylic acid mixed monomer was added, the mixing reaction was continued for 5 minutes, and 0.7 parts of initiator were added dropwise again for 45 minutes, after the addition was completed, the reaction was kept warm for 3 hours, the heating was stopped, and the coating was emulsified with high-speed stirring to obtain the coating.

[0068] Detection: The wood was processed into a sample, and after the wood was dried, it was vacuumed for 30 minutes, and the vacuum degree was 0.08MPa. After the vacuuming was completed, it was immersed in the coatings prepared in Examples 1-6 and Comparative Example 1, respectively, and the pressure was increased to 1.5MPa. After the pressure was immersed for 45 minutes, it was taken out, heated to 110°C and dried for 8 hours to obtain the test sample;

[0069] According to LY / T 1283, white poplar was used as raw material, and the test samples were prepared after being impregnated with paint. The test samples were inoculated with dense sticky phylloxera and colorful velvet coriolus to test their corrosion resistance.

[0070] According to LY / T 1283, white poplar was used as raw material, and the test sample was prepared after being impregnated with coating. After being immersed in deionized water at a temperature of 20°C for 24 hours, the corrosion resistance was tested again.

[0071] After the sample was placed at room temperature for 21 days, its dimensions in all directions were tested, and then it was immersed in 20°C distilled water for 30 minutes, and then taken out and its dimensions were measured again to detect its volume swelling rate;

[0072] The test results are shown in the table below;

[0073]

[0074] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A preparation process for a coating for improving the antibacterial and corrosion resistance of wood, characterized in that: The following steps are involved: After nitrogen is introduced into deionized water for 2-5 minutes, the nitrogen atmosphere is protected, an emulsifier is added to the deionized water, and after mixing for 1-3 minutes, methyl methacrylate, butyl acrylate, isooctyl acrylate and a corrosion-resistant antibacterial agent are added and stirred for 3-5 minutes to obtain an acrylic acid mixed monomer; the acrylic acid mixed monomer is divided into two equal parts, the first part of the acrylic acid mixed monomer is heated to 75-85° C., and the first part of the initiator is added dropwise for 45-80 minutes. After the addition is completed, the temperature is raised to 85-90° C., and the stirring reaction is continued for 90-180 minutes. The second part of the acrylic acid mixed monomer is added, and the mixing reaction is continued for 5-10 minutes. The second part of the initiator is added dropwise for 30-60 minutes. After the addition is completed, the heat is kept for reaction for 2-4 hours, and the heating is stopped, and the coating is emulsified by high-speed stirring to obtain the coating; The preparation process of the corrosion-resistant antibacterial agent comprises the following steps: Add 2,2-difluoromalonic acid and deionized water to the reaction container, mix well, add p-toluenesulfonic acid, mix for 1-3 minutes, add N,N-dimethylethanolamine dropwise, the addition time is 1-4 hours, and the temperature of the reaction system is controlled to be 85-90°C during the addition. After the addition is completed, continue to heat to 95-98°C, keep the temperature for reaction for 2-4 hours, add 1-bromodecane dropwise, continue to react for 2-4 hours, remove excess solvent by rotary evaporation, and use DMF solvent to obtain the mixture. The dried product is dissolved and added dropwise to a DMF solution containing diethylenetriamine for 1-1.5 hours. During the addition, the temperature of the reaction system is controlled to be 85-120°C. After the addition is completed, the temperature is continued to be raised to 120-130°C, stirred for reaction for 0.5-1 hour, cooled to room temperature, dicyandiamide is added, the temperature is raised to 78-80°C, the reaction is continued for 2-4 hours, allyl acetic acid is added, the reaction is continued for 0.5-1 hour, and the excess solvent is removed by rotary evaporation to obtain a corrosion-resistant antibacterial agent; Wherein, by weight, the mass ratio of the 2,2-difluoromalonic acid, p-toluenesulfonic acid, and N,N-dimethylethanolamine is 10: (0.15-0.3): (5-6.5); The mass ratio of the dried product, diethylenetriamine and dicyandiamide is 10:(2-2.4):(1.5-2); The mass ratio of the dried product to allyl acetic acid is 10:(1.5-2).

2. The preparation process of a coating for improving the antibacterial and corrosion resistance of wood according to claim 1, characterized in that: The coating consists of 0.5-1 parts of emulsifier, 70-100 parts of deionized water, 15-28 parts of methyl methacrylate, 16-30 parts of butyl acrylate, 5-8 parts of isooctyl acrylate, 2-5 parts of corrosion-resistant antibacterial agent and 0.8-1.5 parts of initiator in parts by weight.

3. The preparation process of a coating for improving the antibacterial and corrosion resistance of wood according to claim 1, characterized in that: The mass ratio of the first initiator to the second initiator is (1-2):

1.

4. The preparation process of a coating for improving the antibacterial and corrosion resistance of wood according to claim 1, characterized in that: In terms of weight, the mass ratio of the 2,2-difluoromalonic acid to 1-bromodecane is 10:(10-16).

5. A coating for improving the antibacterial and corrosion resistance of wood prepared by the preparation process according to any one of claims 1 to 4.

6. The use of a coating for improving the antibacterial and corrosion resistance of wood according to claim 5, characterized in that: The coating is applied to wood antibacterial and anticorrosive properties by vacuum impregnation.

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