An anticorrosive coating for wooden floors and its preparation method

Abstract

The present invention relates to an anti-corrosion coating for wooden floors and a preparation method thereof, which comprises 70-83 parts of tung oil, 1.6-2.5 parts of antibacterial chelating auxiliary agent, 10-15 parts of reactive diluent, 0.4-0.8 parts of silver ion antibacterial agent, 4-8 parts of curing agent, 0.2-0.5 parts of thickening agent, 0.5-1.5 parts of pigment, 0.5-1 part of catalyst, 0.1-0.2 parts of defoaming agent and 0.1-0.5 parts of dispersant by weight; the triazole ring penetrates into the surface layer of the wooden floor through capillary action and diffusion, can efficiently kill bacteria and fungi, and improve the anti-corrosion performance of wood. The unpaired lone pair electrons S and N elements in the structure of thiosemicarbazide Schiff base can coordinate with metal silver ions to form a ring structure similar to that of small molecule chelates, can chelate and coat the metal silver ions, improve the fixation rate of silver ions in the wooden floor, and still maintain good antibacterial and bacteriostatic effects after being washed many times.

Description

Technical Field

[0001] The present invention belongs to the technical field of anti-corrosion coatings, and in particular, relates to an anti-corrosion coating for wooden floors and a preparation method thereof. Background Art

[0002] Wooden flooring is a common home decoration material, mainly including solid wood flooring, laminate flooring, solid wood composite flooring and other types. Since the core material of wooden flooring - wood, is a biomass material, it has the disadvantage of being easily corroded. Anti-corrosion treatment is an important technical approach to extend the service life of wood, save wood resources, expand the application field of wood, and achieve high added value of wood.

[0003] In order to reduce the dependence on log resources, waste furniture wood and tree branches are crushed and cleaned, then hot-ground into fiber materials, and then compounded with adhesives, and the mixture is paved and hot-pressed into shape. However, since waste furniture wood and tree branches contain more decay fungi, such as white rot fungi and brown rot fungi, these fungi can decompose organic substances such as cellulose, hemicellulose, lignin, etc. in wood into carbon dioxide and water. In the process of manufacturing fiberboard, it is easy to damage the composite board.

[0004] CCA (copper chromium arsenate) is an internationally recognized preservative with excellent effects and wide application, but its anti-leakage effect is poor, and the arsenic that leaks out is very harmful to human health and the environment. At present, the new generation of wood preservatives used to replace CCA are mainly ammonia-soluble quaternary copper (ACQ) and copper azole (CA). Their main components are copper and organic biocides. However, due to the lack of heavy metal elements such as chromium and arsenic, ACQ and CA have poor fixation rates in wood and are easily lost when in contact with water or soil, which will affect the anti-corrosion effect of wood.

[0005] Tung oil is a very important industrial oil. It is a pure natural and environmentally friendly biomass paint. After being applied to the surface of wood, it can penetrate deep into the wood with its own permeability to prevent the wood from absorbing water and moisture, thereby providing good protection for the wood. In the current market environment where environmental protection requirements are becoming increasingly stringent, tung oil, as a natural material, does not release harmful substances such as formaldehyde and has a far-reaching application background. However, tung oil can only play a physical isolation and protection role. It does not have anti-mildew and anti-corrosion capabilities by itself. It needs to be supplemented with certain antibacterial agents to meet the anti-corrosion needs. For example, the above-mentioned CCA / ACQ / CA all have good anti-corrosion capabilities, but they all have certain toxicity and do not meet the existing environmental protection needs. In comparison, silver-based preservatives are stable, non-toxic and have broad-spectrum antibacterial properties. They are the preferred materials for anti-corrosion and antibacterial preparations for panels. However, in actual studies, the anti-corrosion effect of panels with added silver preservatives is far from the theoretical effect, and the silver preservatives are severely lost after scrubbing and cleaning, which reduces the anti-corrosion performance of the panels. Summary of the Invention

[0006] To solve the technical problems mentioned in the background art, the purpose of the present invention is to provide an anti-corrosion coating for wooden floors and a preparation method thereof;

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] An anti-corrosion coating for wooden floors, comprising the following raw materials by weight:

[0009] 70 - 83 parts of tung oil, 1.6 - 2.5 parts of antibacterial chelating agent, 10 - 15 parts of active diluent, 0.4 - 0.8 parts of silver ion antibacterial agent, 4 - 8 parts of curing agent, 0.2 - 0.5 parts of thickening agent, 0.5 - 1.5 parts of pigment, 0.5 - 1 part of catalyst, 0.1 - 0.2 parts of defoaming agent and 0.1 - 0.5 parts of dispersant;

[0010] Preparation of antibacterial chelating agent:

[0011] Step A1: Take epichlorohydrin, phenylacetylene, sodium azide, copper acetate and THF and mix them into a reaction kettle. Control the stirring rate at 300 - 400 r / min, heat up to 50 - 60 °C, and stir and react for 1 - 2 h to obtain intermediate 1;

[0012] Furthermore, the dosage ratio of epichlorohydrin, phenylacetylene, sodium azide, copper acetate and THF is 7 - 10 g : 10 - 13 g : 6 - 8.5 g : 1 - 2 g : 70 - 90 mL;

[0013] Epichlorohydrin first undergoes ring-opening and then undergoes ring-opening addition reaction with phenylacetylene and then addition reaction with sodium azide to form intermediate 1; the specific reaction process is as follows:

[0014]

[0015] Step A2: Take thiosemicarbazide, salicylaldehyde, sodium bicarbonate and ethanol and mix them into a reaction kettle. Control the stirring rate at 250 - 300 r / min, heat up to 45 - 60 °C under a nitrogen atmosphere, and stir and react for 3 h to obtain intermediate 2;

[0016] Furthermore, the dosage ratio of thiosemicarbazide, salicylaldehyde, sodium bicarbonate and ethanol is 10 - 15 g : 13 - 20 mL : 2 - 3 g : 70 - 85 mL;

[0017] Thiosemicarbazide and salicylaldehyde undergo an addition reaction under the catalysis of sodium bicarbonate to introduce an aminothiourea Schiff base structure; the specific reaction process is as follows:

[0018]

[0019] Step A3: Charge intermediate 1, intermediate 2, DMF, and tetrakis(triphenylphosphine)palladium into a reaction kettle, control the stirring reaction rate at 200 - 300 r / min, heat up to 60 - 75 °C, and stir and react for 3 h to obtain an antibacterial chelating auxiliary agent;

[0020] Furthermore, the dosage ratio of intermediate 1, intermediate 2, tetrakis(triphenylphosphine)palladium, and DMF is 10 - 15 g : 11.4 - 17.2 g : 0.1 - 0.2 g : 50 - 65 mL;

[0021] Intermediate 1 and intermediate 2 react under the catalysis of tetrakis(triphenylphosphine)palladium, grafting intermediate 2 onto intermediate 1. The specific reaction process is as follows:

[0022]

[0023] Preparation of an anticorrosive coating for wooden floors:

[0024] Step S1: Charge the antibacterial chelating auxiliary agent and dimethyl carbonate into a stirrer, control the stirring rate at 800 - 1000 r / min, stir for 20 min, then add tung oil, active diluent, silver ion antibacterial agent, catalyst, curing agent, thickener, defoamer, pigment, and dispersant, and continue to stir for 1 - 2 h to obtain an anticorrosive coating for wooden floors.

[0025] Advantages of the present invention:

[0026] The present invention discloses an anti-corrosion coating for wooden floors, which uses tung oil as the matrix and participates in esterification cross-linking by compounding a self-made antibacterial chelating aid. Compared with the existing tung oil matrix, it has better anti-corrosion performance. At the same time, it can still maintain good antibacterial effects after being washed many times. The antibacterial chelating aid is obtained by first ring-opening epoxy chloroethane and adding it to phenylacetylene for an addition reaction, and then adding it to sodium azide for an addition reaction to obtain intermediate 1; thiosemicarbazide and salicylaldehyde are subjected to an addition reaction to obtain intermediate 2; then intermediate 1 and intermediate 2 are subjected to a coupling reaction to graft intermediate 2 onto the molecule of intermediate 1 to form an antibacterial chelating aid; the triazole ring in the antibacterial chelating aid penetrates into the surface layer of the wooden floor through capillary action and diffusion, destroys the lipid structure and function of the cell membranes of bacteria and fungi, causes changes in the permeability of the cell membrane, and the loss of cell contents, resulting in the death of bacteria and fungi, thereby achieving the purpose of sterilizing wood and effectively improving the anti-corrosion performance of wood. At the same time, the unpaired lone pair electrons S and N elements in the aminothiourea Schiff base structure of the antibacterial chelating aid can give lone pair electrons to coordinate with silver ions to form a ring structure similar to that of small molecule chelates, which can chelate and coat silver ions. Silver ions can react with peptidoglycan in the cell wall, causing damage to the inherent components of the cell or obstacles to production functions; the triazole ring and silver ions carry out synergistic antibacterial effects, further strengthening the antibacterial activity, anti-corrosion performance of the wooden floor and the antibacterial range of the antibacterial chelating aid. At the same time, it can also fix silver ions, improve the fixation rate of silver ions in the wooden floor, and still maintain good antibacterial and bacteriostatic effects after being washed many times, so as to achieve the purpose of enhancing the anti-loss ability of silver ions. Detailed implementation mode

[0027] The following will combine 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 a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0028] Example 1

[0029] The specific implementation process of preparing an anti-corrosion coating for wooden floors in this example is as follows:

[0030] 1) Preparation of antibacterial chelating aid:

[0031] a1: Take epoxy chloroethane, phenylacetylene, sodium azide, copper acetate and THF and mix them for feeding. Control the stirring rate at 300 r / min, heat up to 50 °C, and stir and react for 1 h to obtain intermediate 1; in the above reaction, the dosage ratio of epoxy chloroethane, phenylacetylene, sodium azide, copper acetate and THF is 7 g: 10 g: 6 g: 1 g: 70 mL;

[0032] a2: Mix thiosemicarbazide, salicylaldehyde, sodium bicarbonate and ethanol and charge them into a reaction kettle. Control the stirring rate at 250 r / min. Heat up to 45 °C under a nitrogen atmosphere and stir for 3 h to obtain intermediate 2. In the above reaction, the dosage ratio of thiosemicarbazide, salicylaldehyde, sodium bicarbonate and ethanol is 10 g: 13 mL: 2 g: 70 mL;

[0033] a3: Mix intermediate 1, intermediate 2, DMF and tetrakis(triphenylphosphine)palladium and charge them into a reaction kettle. Control the stirring rate at 200 r / min. Heat up to 60 °C and stir for 3 h to obtain an antibacterial chelating auxiliary. In the above reaction, the dosage ratio of intermediate 1, intermediate 2, tetrakis(triphenylphosphine)palladium and DMF is 10 g: 11.4 g: 0.1 g: 50 mL;

[0034] 2) Preparation of an anticorrosive coating for wooden floors

[0035] s1: Mix 0.32 kg of an antibacterial chelating agent and 0.8 kg of dimethyl carbonate and charge them into a stirrer. Control the stirring rate at 800 r / min and stir for 20 min. Then add 14 kg of tung oil (both this example and the comparative example use the cooked tung oil of Shandong Hengshuo Chemical Co., Ltd., model 2008-3), 2 kg of an active diluent (both this example and the comparative example use isobornyl acrylate of Shanghai Merck Chemical Technology Co., Ltd.), 0.08 kg of a silver ion antibacterial agent, 0.1 kg of a catalyst (this example uses stannous oxide), 0.8 kg of a curing agent (both this example and the comparative example use tung oil anhydride of Wuhan Huaxiang Kejie Biotechnology Co., Ltd.), 0.04 kg of a thickener (both this example and the comparative example use sodium carboxymethyl cellulose of Shanghai Aladdin Biochemical Technology Co., Ltd., model C304951), 0.02 kg of an antifoaming agent (both this example and the comparative example use an antifoaming agent of Suzhou Antifu New Materials Co., Ltd., model AFE-3168), 0.1 kg of a pigment (both this example and the comparative example use titanium dioxide) and 0.02 kg of a dispersant (both this example and the comparative example use Degussa KL245 substrate wetting agent of Foshan Shunde Sansheng Trading Co., Ltd., model TEGOWET KL245), and continue to stir for 1 h to obtain an anticorrosive coating for wooden floors.

[0036] Example 2

[0037] The specific implementation process of preparing an anticorrosive coating for wooden floors in this example is as follows:

[0038] 1) Preparation of an antibacterial chelating auxiliary:

[0039] a1: Charge epichlorohydrin, phenylacetylene, sodium azide, copper acetate and THF, control the stirring rate at 320 r / min, heat up to 52 °C, and stir for 1 h to obtain Intermediate 1; in the above reaction, the dosage ratio of epichlorohydrin, phenylacetylene, sodium azide, copper acetate and THF is 7.5 g: 10.7 g: 6.4 g: 1.5 g: 75 mL;

[0040] a2: Charge thiosemicarbazide, salicylaldehyde, sodium bicarbonate and ethanol into the reaction kettle, control the stirring rate at 260 r / min, heat up to 48 °C under a nitrogen atmosphere, and stir for 3 h to obtain Intermediate 2; in the above reaction, the dosage ratio of thiosemicarbazide, salicylaldehyde, sodium bicarbonate and ethanol is 11 g: 14.3 mL: 2 g: 75 mL;

[0041] a3: Charge Intermediate 1, Intermediate 2, DMF and tetrakis(triphenylphosphine)palladium into the reaction kettle, control the stirring reaction rate at 220 r / min, heat up to 65 °C, and stir for 3 h to obtain the antibacterial chelating agent; in the above reaction, the dosage ratio of Intermediate 1, Intermediate 2, tetrakis(triphenylphosphine)palladium and DMF is 11 g: 12.5 g: 0.1 g: 55 mL;

[0042] 2) Preparation of the anticorrosive coating for wooden floors

[0043] s1: Charge 0.36 kg of antibacterial chelating agent and 0.9 kg of dimethyl carbonate into the stirrer, control the stirring rate at 800 r / min, stir for 20 min, then add 15 kg of tung oil, 2.4 kg of reactive diluent, 0.1 kg of silver ion antibacterial agent, 0.1 kg of catalyst, 1 kg of curing agent, 0.06 kg of thickener, 0.03 kg of defoamer, 0.12 kg of pigment and 0.03 kg of dispersant, and continue to stir for 1.5 h to obtain the anticorrosive coating for wooden floors.

[0044] Example 3

[0045] The specific implementation process of preparing an anticorrosive coating for wooden floors in this example is as follows:

[0046] 1) Preparation of the antibacterial chelating agent:

[0047] a1: Charge epichlorohydrin, phenylacetylene, sodium azide, copper acetate and THF, control the stirring rate at 400 r / min, heat up to 60 °C, and stir for 2 h to obtain Intermediate 1; in the above reaction, the dosage ratio of epichlorohydrin, phenylacetylene, sodium azide, copper acetate and THF is 10 g: 13 g: 8.5 g: 2 g: 90 mL;

[0048] a2: Charge thiosemicarbazide, salicylaldehyde, sodium bicarbonate and ethanol into a reaction kettle, control the stirring rate at 300 r / min, heat up to 60 °C under a nitrogen atmosphere, and obtain Intermediate 2 after stirring and reacting for 3 h; in the above reaction, the dosage ratio of thiosemicarbazide, salicylaldehyde, sodium bicarbonate and ethanol is 15 g: 20 mL: 3 g: 80 mL;

[0049] a3: Charge Intermediate 1, Intermediate 2, DMF and tetrakis(triphenylphosphine)palladium into a reaction kettle, control the stirring reaction rate at 300 r / min, heat up to 75 °C, and obtain the antibacterial chelating auxiliary after stirring and reacting for 3 h; in the above reaction, the dosage ratio of Intermediate 1, Intermediate 2, tetrakis(triphenylphosphine)palladium and DMF is 15 g: 17.2 g: 0.2 g: 65 mL;

[0050] 2) Prepare the anticorrosive coating for wooden floors

[0051] s1: Charge 0.5 kg of antibacterial chelating agent and 1.5 kg of dimethyl carbonate into a stirrer, control the stirring rate at 1000 r / min, stir for 20 min, and then add 16.5 kg of tung oil, 3 kg of reactive diluent, 0.16 kg of silver ion antibacterial agent, 0.2 kg of catalyst, 1.6 kg of curing agent, 0.1 kg of thickener, 0.04 kg of defoamer, 0.3 kg of pigment and 0.1 kg of dispersant, and continue to stir for 2 h to obtain the anticorrosive coating for wooden floors.

[0052] Example 4

[0053] The specific implementation process of preparing an anticorrosive coating for wooden floors in this example is as follows:

[0054] 1) Prepare the antibacterial chelating auxiliary:

[0055] a1: Charge epichlorohydrin, phenylacetylene, sodium azide, copper acetate and THF, control the stirring rate at 350 r / min, heat up to 55 °C, and obtain Intermediate 1 after stirring and reacting for 2 h; in the above reaction, the dosage ratio of epichlorohydrin, phenylacetylene, sodium azide, copper acetate and THF is 8 g: 10.5 g: 6.7 g: 2 g: 90 mL;

[0056] a2: Charge thiosemicarbazide, salicylaldehyde, sodium bicarbonate and ethanol into a reaction kettle, control the stirring rate at 300 r / min, heat up to 60 °C under a nitrogen atmosphere, and obtain Intermediate 2 after stirring and reacting for 3 h; in the above reaction, the dosage ratio of thiosemicarbazide, salicylaldehyde, sodium bicarbonate and ethanol is 13 g: 16.9 mL: 2.5 g: 85 mL;

[0057] a3: Charge intermediate 1, intermediate 2, DMF, and tetrakis(triphenylphosphine)palladium into a reaction kettle, control the stirring reaction rate at 300 r / min, heat up to 75 °C, and stir and react for 3 h to obtain an antibacterial chelating auxiliary agent; in the above reaction, the dosage ratio of intermediate 1, intermediate 2, tetrakis(triphenylphosphine)palladium, and DMF is 13 g: 14.8 g: 0.2 g: 65 mL;

[0058] 2) Prepare an anticorrosive coating for wooden floors

[0059] s1: Charge 0.4 kg of antibacterial chelating agent and 1 kg of dimethyl carbonate into a stirrer, control the stirring rate at 1000 r / min, stir for 20 min, then add 15.5 kg of tung oil, 3 kg of reactive diluent, 0.14 kg of silver ion antibacterial agent, 0.15 kg of catalyst, 1 kg of curing agent, 0.04 kg of thickener, 0.03 kg of defoamer, 0.2 kg of pigment, and 0.04 kg of dispersant, and continue to stir for 2 h to obtain an anticorrosive coating for wooden floors.

[0060] Example 5

[0061] The specific implementation process of preparing an anticorrosive coating for wooden floors in this example is as follows:

[0062] 1) Prepare an antibacterial chelating auxiliary agent:

[0063] a1: Charge epichlorohydrin, phenylacetylene, sodium azide, copper acetate, and THF, control the stirring rate at 380 r / min, heat up to 58 °C, and stir and react for 2 h to obtain intermediate 1; in the above reaction, the dosage ratio of epichlorohydrin, phenylacetylene, sodium azide, copper acetate, and THF is 9 g: 12.9 g: 7.7 g: 1 g: 85 mL;

[0064] a2: Charge thiosemicarbazide, salicylaldehyde, sodium bicarbonate, and ethanol into a reaction kettle, control the stirring rate at 280 r / min, heat up to 55 °C under a nitrogen atmosphere, and stir and react for 3 h to obtain intermediate 2; in the above reaction, the dosage ratio of thiosemicarbazide, salicylaldehyde, sodium bicarbonate, and ethanol is 14 g: 18.2 mL: 2.5 g: 80 mL;

[0065] a3: Charge intermediate 1, intermediate 2, DMF, and tetrakis(triphenylphosphine)palladium into a reaction kettle, control the stirring reaction rate at 280 r / min, heat up to 70 °C, and stir and react for 3 h to obtain an antibacterial chelating auxiliary agent; in the above reaction, the dosage ratio of intermediate 1, intermediate 2, tetrakis(triphenylphosphine)palladium, and DMF is 14 g: 16 g: 0.15 g: 60 mL;

[0066] 2) Prepare an anticorrosive coating for wooden floors

[0067] S1: Mix 0.34 kg of antibacterial chelating agent and 0.85 kg of dimethyl carbonate and feed them into a stirrer. Control the stirring rate at 900 r / min and stir for 20 min. Then add 16 kg of tung oil, 2.4 kg of reactive diluent, 0.1 kg of silver ion antibacterial agent, 0.12 kg of catalyst, 1.2 kg of curing agent, 0.04 kg of thickener, 0.03 kg of defoamer, 0.2 kg of pigment and 0.04 kg of dispersant, and continue stirring for 2 h to obtain an anticorrosive coating for wooden floors.

[0068] Example 6

[0069] The specific implementation process for preparing an anticorrosive coating for wooden floors in this example is as follows:

[0070] 1) Prepare antibacterial chelating auxiliary agent:

[0071] a1: Take epichlorohydrin, phenylacetylene, sodium azide, copper acetate and THF and mix and feed them. Control the stirring rate at 380 r / min, heat up to 58 °C, and stir and react for 2 h to obtain intermediate 1; in the above reaction, the dosage ratio of epichlorohydrin, phenylacetylene, sodium azide, copper acetate and THF is 9 g: 12.9 g: 7.7 g: 1 g: 85 mL;

[0072] a2: Take thiosemicarbazide, salicylaldehyde, sodium bicarbonate and ethanol and mix and feed them into a reaction kettle. Control the stirring rate at 280 r / min, heat up to 55 °C under a nitrogen atmosphere, and stir and react for 3 h to obtain intermediate 2; in the above reaction, the dosage ratio of thiosemicarbazide, salicylaldehyde, sodium bicarbonate and ethanol is 14 g: 18.2 mL: 2.5 g: 80 mL;

[0073] a3: Take intermediate 1, intermediate 2, DMF and tetrakis(triphenylphosphine)palladium and mix and feed them into a reaction kettle. Control the stirring reaction rate at 280 r / min, heat up to 70 °C, and stir and react for 3 h to obtain an antibacterial chelating auxiliary agent; in the above reaction, the dosage ratio of intermediate 1, intermediate 2, tetrakis(triphenylphosphine)palladium and DMF is 14 g: 16 g: 0.15 g: 60 mL;

[0074] 2) Prepare an anticorrosive coating for wooden floors

[0075] S1: Mix 0.44 kg of antibacterial chelating agent and 1.1 kg of dimethyl carbonate and feed them into a stirrer. Control the stirring rate at 900 r / min and stir for 20 min. Then add 16 kg of tung oil, 2.8 kg of reactive diluent, 0.14 kg of silver ion antibacterial agent, 0.16 kg of catalyst, 1.2 kg of curing agent, 0.04 kg of thickener, 0.03 kg of defoamer, 0.2 kg of pigment and 0.04 kg of dispersant, and continue stirring for 2 h to obtain an anticorrosive coating for wooden floors.

[0076] Comparative Example 1

[0077] The specific implementation process of preparing an anti-corrosion coating for wooden floors in this comparative example is as follows:

[0078] S1: Mix 14 kg of tung oil, 0.4 kg of melamine, 3 kg of reactive diluent, 0.1 kg of silver ion antibacterial agent, 1.6 kg of curing agent, 0.1 kg of thickener, 0.3 kg of pigment, 0.04 kg of defoamer and 0.1 kg of dispersant and feed them into a stirrer. Control the stirring rate at 800 r / min and stir for 2 h to obtain an anti-corrosion coating for wooden floors.

[0079] Comparative Example 2:

[0080] The specific implementation process of preparing an anti-corrosion coating for wooden floors in this comparative example is as follows:

[0081] S1: Mix 16 kg of tung oil, 0.5 kg of CA preservative (the copper azole wood preservative of Shenzhen Lütai Environmental Protection Technology Co., Ltd. is selected in this comparative example), 3 kg of reactive diluent, 1 kg of curing agent, 0.06 kg of thickener, 0.12 kg of pigment, 0.03 kg of defoamer and 0.03 kg of dispersant and feed them into a stirrer. Control the stirring rate at 850 r / min and stir for 2 h to obtain an anti-corrosion coating for wooden floors.

[0082] In order to test the performance of the anti-corrosion coating for wooden floors, the anti-corrosion coatings for wooden floors prepared in Examples 1-6 and Comparative Examples 1-2 were subjected to relevant performance tests. The specific test data are shown in Table 1:

[0083] Anti-corrosion performance test:

[0084] Spray the anti-corrosion coatings for wooden floors prepared in Examples 1-6 and Comparative Examples 1-2 onto wooden floors of 200 mm×200 mm×10 mm, cure them at a temperature of 100 °C for 3 h, and test them with white rot fungi and brown rot fungi according to the method of GB / T 13942.1-1992 to evaluate their anti-corrosion performance.

[0085] Table 1

[0086]

[0087] As can be seen from Table 1, the weight loss rate of the anti-corrosion coatings for wooden floors prepared in Examples 1-6 of this example is 1.16-2.15% under the corrosion of white rot fungi and 1.43-2.76% under the corrosion of brown rot fungi, and there is little difference in the anti-corrosion performance from the anti-corrosion coatings for wooden floors prepared in Comparative Examples 1-2.

[0088] Fixation rate test:

[0089] The anti-corrosion coatings for wooden floors prepared in Examples 1-6 and Comparative Examples 1-2 were sprayed onto wooden floors with a size of 200 mm X 200 mm X 5 mm, cured at a temperature of 100 °C for 3 h, and then tested in accordance with AWPA EN11-2022. After air drying for 21 days, an indoor water loss test was carried out. The specimens were grouped and soaked in distilled water for 14 days, and the water was changed regularly and the leachate was collected; the concentration of silver in the leachate was measured using an atomic absorption spectrometer, and then the fixation rate of the agent was calculated according to the AWPA EN11-2022 standard; the specific test results are shown in Table 2:

[0090] Table 2

[0091] Test Items <![CDATA[Drug absorption amount / kg / m 3 > Fixation Rate / % Test Standard GB / T27651-2011 AWPA EN11-2022 Example 1 2.417 78.9 Example 2 2.685 80.7 Example 3 3.542 89.1 Example 4 2.825 81.7 Example 5 2.814 82.9 Example 6 3.471 86.4 Comparative Example 1 2.597 44.9 Comparative Example 2 3.496 51.6

[0092] As can be seen from Table 2, for an anti-corrosion coating for wooden floors prepared in Examples 1-6, after being soaked in distilled water for 14 days, the silver ion fixation rate was 78.9-89.7%, while for an anti-corrosion coating for wooden floors prepared in Comparative Examples 1-2, after being soaked in distilled water for 14 days, the silver ion fixation rate was 44.9-52.8%, indicating that the anti-loss performance of the anti-corrosion coating for wooden floors prepared by the present invention is better.

[0093] In the description of the specification, the description with reference to terms such as "an embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0094] The above content is only an example and explanation of the present invention. Those skilled in the art of the present technology can make various modifications or supplements to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined by the claims of the present invention, they should fall within the protection scope of the present invention.

Claims

1. An anticorrosive coating for wooden floors, characterized in that, It includes 70 - 83 parts by weight of tung oil, 1.6 - 2.5 parts of antibacterial chelating auxiliary, 10 - 15 parts of reactive diluent, 0.4 - 0.8 parts of silver ion antibacterial agent, 4 - 8 parts of curing agent, 0.2 - 0.5 parts of thickener, 0.5 - 1.5 parts of pigment, 0.5 - 1 part of catalyst, 0.1 - 0.2 parts of defoamer and 0.1 - 0.5 parts of dispersant; Preparation of antibacterial chelating auxiliary: Step A1: Charge epoxychloroethane, phenylacetylene, sodium azide, copper acetate and THF together, heat up to 50 - 60 °C, and stir and react for 1 - 2 h to obtain intermediate 1; Step A2: Charge thiosemicarbazide, salicylaldehyde, sodium bicarbonate and ethanol together, heat up to 45 - 60 °C under nitrogen atmosphere, and stir and react for 3 h to obtain intermediate 2; Step A3: Charge intermediate 1, intermediate 2, DMF and tetrakis(triphenylphosphine)palladium together, heat up to 60 - 75 °C, and stir and react for 3 h to obtain the antibacterial chelating auxiliary.

2. The anti-corrosion coating for wooden floors according to claim 1, characterized in that In step A1, the dosage ratio of epoxychloroethane, phenylacetylene, sodium azide, copper acetate and THF is 7 - 10 g : 10 - 13 g : 6 - 8.5 g : 1 - 2 g : 70 - 90 mL.

3. An anti-corrosion coating for wooden floors according to claim 1, characterized in that, In step A2, the dosage ratio of thiosemicarbazide, salicylaldehyde, sodium bicarbonate and ethanol is 10 - 15 g : 13 - 20 mL : 2 - 3 g : 70 - 85 mL.

4. An anti-corrosion coating for wooden floors according to claim 1, characterized in that, In step A3, the dosage ratio of intermediate 1, intermediate 2, tetrakis(triphenylphosphine)palladium and DMF is 10 - 15 g : 11.4 - 17.2 g : 0.1 - 0.2 g : 50 - 65 mL.

5. The preparation method of an anti-corrosion coating for wooden floors according to claim 4, characterized in that, The preparation method is as follows: Charge the antibacterial chelating auxiliary and dimethyl carbonate into a stirrer, control the stirring rate at 800 - 1000 r / min, stir for 20 min, then add tung oil, reactive diluent, silver ion antibacterial agent, catalyst, curing agent, thickener, defoamer, pigment and dispersant, and continue to stir for 1 - 2 h to obtain the anticorrosive coating for wooden floors.

6. The preparation method of an anti-corrosion coating for wooden floors according to claim 5, wherein, The reactive diluent is isobornyl acrylate.

7. The preparation method of an anti-corrosion coating for wooden floors according to claim 5, characterized in that, The catalyst is stannous oxide.

8. The preparation method of an anti-corrosion coating for wooden floors according to claim 5, characterized in that, The curing agent is tung oil anhydride.

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