Coating as well as preparation method and application thereof

Abstract

The invention discloses a coating as well as a preparation method and application thereof, and belongs to the technical field of chemical engineering. A component A of the coating comprises the following components in parts by weight: 60-80 parts of epoxy resin, 3-7 parts of a diluent, 0.4-1.6 parts of a coupling agent, 0.4-1.6 parts of a defoaming agent, 0.4-1.6 parts of an anti-settling agent, 1-3 parts of a flatting agent, 16-24 parts of zeolite powder and 1-6 parts of quaternary ammonium salt; the component B is prepared from 65 to 85 parts of polymercaptan, 2 to 4 parts of curing accelerator, 0.4 to 1.6 parts of polysiloxane, 0.2 to 4 parts of defoaming agent, 0.2 to 0.8 part of anti-settling agent, 16 to 24 parts of zeolite powder and 1 to 6 parts of quaternary ammonium salt. The coating inhibits the growth of microorganisms by adsorbing growth substances and destroying microbial cell membranes so as to achieve the antibacterial purpose, has water resistance and corrosion resistance, can be used for a long time after being coated on the inner pipe wall, and has a long antibacterial effect lasting time.

Description

Technical Field

[0001] The present invention relates to the field of chemical technology, and in particular to a coating and a preparation method and application thereof. Background Art

[0002] Solar energy, as a clean, inexhaustible and cost-free energy source, is the focus of research and development in the 21st century. It will replace the increasingly depleted fossil energy and serve as a practical solution to achieve the goal of carbon neutrality. It has been moving further and further on this line and has achieved more and more results. As the mainstream in the industry at this stage, monocrystalline silicon wafers have occupied an increasing share in the market. With the gradual increase in output, the corresponding resource loss in other processes attached to the industry has also increased, especially the use of water resources. At the cleaning end of silicon wafer cutting, a large amount of clean water or even pure water is required. In order to reduce the cost of the cleaning end, part of the water is replaced with treated recycled water, and the relevant indicators are almost the same as tap water.

[0003] In wastewater treatment pipelines, due to long-term use and impurities such as organic matter contained in wastewater, it is very easy for microorganisms, bacteria, fungi and other colonies to grow on the pipe walls. Therefore, during the drainage process, the colonies fall off and mix in the water, causing the water to contain a large amount of suspended matter. When this quality of water is used in the cleaning process, it is very easy to cause the generation of dirt flakes, and even abnormal feedback of dirt on the client side. In order to prevent the large-scale generation of flocs, the current stage mainly uses the method of chemical cleaning to treat the pipe wall, but this method has the problems of long time consumption, high cost, short antibacterial duration, etc., which greatly limits the application scope and utilization rate of the treated water. Summary of the invention

[0004] The main purpose of the present invention is to provide a coating and a preparation method and application thereof, so as to solve the problems in the prior art of poor treatment effect on colonies of microorganisms, bacteria, etc. grown in equipment and short antibacterial duration.

[0005] In order to achieve the above object, according to one aspect of the present invention, a coating is provided, which is obtained by mixing component A and component B; wherein:

[0006] Component A includes the following raw materials in parts by weight: 60-80 parts of epoxy resin, 3-7 parts of diluent, 0.4-1.6 parts of coupling agent, 0.4-1.6 parts of defoaming agent, 0.4-1.6 parts of anti-settling agent, 1-3 parts of leveling agent, 16-24 parts of zeolite powder, and 1-6 parts of quaternary ammonium salt;

[0007] Component B comprises the following raw materials in parts by weight: 65-85 parts of polythiol, 2-4 parts of curing accelerator, 0.4-1.6 parts of polysiloxane, 0.2-4 parts of defoaming agent, 0.2-0.8 parts of anti-settling agent, 16-24 parts of zeolite powder and 1-6 parts of quaternary ammonium salt.

[0008] Further, the A component and the B component are mixed in a weight ratio of 1:(0.9-1.1).

[0009] Furthermore, component A includes the following raw materials in parts by weight: 64-76 parts of epoxy resin, 4-7 parts of diluent, 0.6-1.6 parts of coupling agent, 0.6-1.6 parts of defoaming agent, 0.6-1.6 parts of anti-settling agent, 1.5-3 parts of leveling agent, 18-24 parts of zeolite powder, and 1-5 parts of quaternary ammonium salt.

[0010] Furthermore, component B includes the following raw materials in parts by weight: 70-80 parts of polythiol, 2.5-4 parts of curing accelerator, 0.6-1.6 parts of polysiloxane, 0.5-2 parts of defoaming agent, 0.4-0.8 parts of anti-settling agent, 18-24 parts of zeolite powder, and 2-5 parts of quaternary ammonium salt.

[0011] Furthermore, component A includes the following raw materials in parts by weight: 68-72 parts of epoxy resin, 5-7 parts of diluent, 0.8-1.6 parts of coupling agent, 0.8-1.6 parts of defoaming agent, 0.8-1.6 parts of anti-settling agent, 2-3 parts of leveling agent, 18-22 parts of zeolite powder, and 3-5 parts of quaternary ammonium salt.

[0012] Furthermore, component B includes the following raw materials in parts by weight: 73-80 parts of polythiol, 3-4 parts of curing accelerator, 1-1.6 parts of polysiloxane, 0.5-1 part of defoamer, 0.5-0.8 part of anti-settling agent, 18-22 parts of zeolite powder, and 3-5 parts of quaternary ammonium salt.

[0013] Furthermore, in component A, the epoxy resin is selected from bisphenol A type epoxy resin, preferably E51 type epoxy resin.

[0014] Furthermore, the particle size of the zeolite powder is 350-450 mesh.

[0015] Furthermore, the zeolite powder is selected from at least one of analcime powder, calcium zeolite powder and sodium zeolite powder, and the specific surface area of ​​the zeolite is 200-800m 2 / g.

[0016] Furthermore, the quaternary ammonium salt is selected from double-chain quaternary ammonium salts.

[0017] Furthermore, the quaternary ammonium salt is selected from at least one of bis-decyl dimethyl ammonium bromide, bis-decyl dimethyl ammonium chloride, octadecyl dimethyl ammonium chloride and tetramethyl ammonium oxalate; preferably tetramethyl ammonium oxalate.

[0018] Furthermore, in component A, the diluent is selected from epoxy diluents, and preferably, the epoxy diluent is butyl glycidyl ether.

[0019] Furthermore, the coupling agent is selected from silane coupling agents.

[0020] Furthermore, the brand of the silane coupling agent is KH-560.

[0021] Furthermore, the defoaming agent is selected from carboxyl-modified silicone oil.

[0022] Furthermore, the defoaming agent is selected from at least one of methylchlorophenyl silicone oil, methyltrifluoropropyl silicone oil and methylcarboxyl silicone oil.

[0023] Furthermore, the anti-settling agent is selected from fumed silica.

[0024] Furthermore, the leveling agent is selected from at least one of poly (isooctyl) acrylate, butyl acrylate modified silicone type and fluorosilicone modified acrylate.

[0025] Furthermore, in component B, the polythiol is selected from modified polythiol.

[0026] Furthermore, the model of the modified polythiol is GL S820.

[0027] Furthermore, the particle size of the zeolite powder is 350-450 meshes.

[0028] Furthermore, the quaternary ammonium salt is selected from double-chain quaternary ammonium salts.

[0029] Furthermore, the quaternary ammonium salt is selected from at least one of bis-decyl dimethyl ammonium bromide, bis-decyl dimethyl ammonium chloride, octadecyl dimethyl ammonium chloride and tetramethyl ammonium oxalate; preferably tetramethyl ammonium oxalate.

[0030] Furthermore, in component B, the curing accelerator is DMP-30 curing accelerator.

[0031] Furthermore, the polysiloxane is selected from modified polysiloxanes, preferably polyether-modified polysiloxanes.

[0032] Furthermore, the polysiloxane is selected from polydimethylsiloxane and / or polyether phosphate modified siloxane.

[0033] Furthermore, the defoaming agent is selected from carboxyl-modified silicone oil.

[0034] Furthermore, the defoaming agent is selected from at least one of methylchlorophenyl silicone oil, methyltrifluoropropyl silicone oil and methylcarboxyl silicone oil.

[0035] Furthermore, the anti-settling agent is selected from fumed silica.

[0036] Furthermore, the leveling agent is selected from at least one of poly (isooctyl) acrylate, butyl acrylate modified silicone type and fluorosilicone modified acrylate.

[0037] According to a second aspect of the present invention, there is provided a method for preparing the above-mentioned coating, comprising the following steps:

[0038] Step S1: preparing various raw materials according to the formula of component A, and mixing the various raw materials to obtain component A;

[0039] Step S2: preparing various raw materials according to the formula of component B, and mixing the various raw materials to obtain component B;

[0040] Step S3: mixing component A and component B in a weight ratio of 1:(0.9-1.1) to obtain a coating;

[0041] Preferably, in step S1, the raw materials are stirred and mixed by ultrasonic stirring to obtain component A.

[0042] Preferably, in step S2, the raw materials are stirred and mixed by ultrasonic stirring to obtain component B.

[0043] According to a third aspect of the present invention, the above-mentioned coating or the coating prepared by the above-mentioned method is provided and applied to the inner wall of equipment for antibacterial and anti-corrosion.

[0044] Further, it is coated on the inner wall of the pipeline.

[0045] Furthermore, it is coated on the inner wall of the wastewater treatment pipe.

[0046] The technical scheme of the present invention is applied to provide a coating formed by mixing component A and component B. The present invention utilizes the microporous structure and high specific surface area of ​​zeolite in the coating, and the good interaction between quaternary ammonium salt and zeolite, and the antibacterial effect of physical filtration and chemical action of zeolite, and inhibits the growth of microorganisms by adsorbing growth substances and destroying microbial cell membranes, thereby achieving the antibacterial purpose; at the same time, the coating developed by the present invention belongs to an epoxy resin glue system, has great advantages in waterproof and anticorrosive performance, and the recycled water is weakly acidic. Therefore, after the developed coating is coated on the inner pipe wall, it can be used for a long time and the antibacterial effect lasts for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0048] Figure 1 The preparation process route diagram of the antibacterial main body in the coating of the embodiment of the present invention is shown;

[0049] Figure 2 The preparation process of the resin body in the coating of the embodiment of the present invention is shown;

[0050] Figure 3 The figure shows the actual comparison of the antibacterial effects of multiple groups of coatings in the application examples of the present invention. DETAILED DESCRIPTION

[0051] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0052] Aiming at the problem that bacteria grow on the wall of wastewater recovery and treatment pipeline and cannot be properly treated, the present invention develops a coating, which is applied to the inner wall of the pipeline to effectively inhibit bacteria and resist corrosion.

[0053] The coating provided by the present invention is obtained by mixing component A and component B; wherein,

[0054] Component A includes the following raw materials in parts by weight:

[0055] 60-80 parts of epoxy resin, 3-7 parts of diluent, 0.4-1.6 parts of coupling agent, 0.4-1.6 parts of defoaming agent, 0.4-1.6 parts of anti-settling agent, 1-3 parts of leveling agent, 16-24 parts of zeolite powder, 1-6 parts of quaternary ammonium salt;

[0056] Component B includes the following raw materials in parts by weight:

[0057] 65-85 parts of polythiol, 2-4 parts of curing accelerator, 0.4-1.6 parts of polysiloxane, 0.2-4 parts of defoaming agent, 0.2-0.8 parts of anti-settling agent, 16-24 parts of zeolite powder, and 1-6 parts of quaternary ammonium salt.

[0058] In order to make component A and component B play a better synergistic role after mixing, component A and component B in the coating of the present invention are mixed in a weight ratio of 1: (0.9-1.1) when used, and are immediately applied to the inner wall of the pipeline after mixing. The coating needs to be used immediately after application.

[0059] The present invention utilizes the microporous structure and high specific surface area of ​​the zeolite in the coating, and the good interaction between the quaternary ammonium salt and the zeolite, and the antibacterial effect of the physical filtration and chemical action of the zeolite, and inhibits the growth of microorganisms by adsorbing growth substances and destroying the cell membrane of microorganisms, thereby achieving the antibacterial purpose; at the same time, the coating developed by the present invention belongs to the epoxy resin glue system, has great advantages in waterproof and anticorrosive performance, and the recycled treated water is weakly acidic, so after the coating is coated on the inner pipe wall, it can be used for a long time and the antibacterial effect lasts for a long time.

[0060] As a preferred embodiment, the coating A component of the present invention includes the following raw materials in parts by weight: 64-76 parts of epoxy resin, 4-7 parts of diluent, 0.6-1.6 parts of coupling agent, 0.6-1.6 parts of defoamer, 0.6-1.6 parts of anti-settling agent, 1.5-3 parts of leveling agent, 18-24 parts of zeolite powder, 1-5 parts of quaternary ammonium salt; the B component includes the following raw materials in parts by weight: 70-80 parts of polythiol, 2.5-4 parts of curing accelerator, 0.6-1.6 parts of polysiloxane, 0.5-2 parts of defoamer, 0.4-0.8 parts of anti-settling agent, 18-24 parts of zeolite powder, 2-5 parts of quaternary ammonium salt. In the above formula of the present invention, the synergistic effect of multiple components can further improve the antibacterial effect.

[0061] As a more preferred embodiment, the coating A component of the present invention includes the following raw materials in parts by weight: 68-72 parts of epoxy resin, 5-7 parts of diluent, 0.8-1.6 parts of coupling agent, 0.8-1.6 parts of defoamer, 0.8-1.6 parts of anti-settling agent, 2-3 parts of leveling agent, 18-22 parts of zeolite powder, 3-5 parts of quaternary ammonium salt; the B component includes the following raw materials in parts by weight: 73-80 parts of polythiol, 3-4 parts of curing accelerator, 1-1.6 parts of polysiloxane, 0.5-1 parts of defoamer, 0.5-0.8 parts of anti-settling agent, 18-22 parts of zeolite powder, 3-5 parts of quaternary ammonium salt. In the above-mentioned formula of the present invention, the antibacterial effect can be further improved by further regulating the synergistic effect of each component.

[0062] As a more preferred embodiment, the coating A component of the present invention includes the following raw materials in parts by weight: 70-72 parts of epoxy resin, 5-7 parts of diluent, 1-1.6 parts of coupling agent, 1-1.6 parts of defoamer, 1-1.6 parts of anti-settling agent, 2-3 parts of leveling agent, 18-22 parts of zeolite powder, 3-5 parts of quaternary ammonium salt; the B component includes the following raw materials in parts by weight: 75-78 parts of polythiol, 3-4 parts of curing accelerator, 1-1.6 parts of polysiloxane, 0.5-0.8 parts of defoamer, 0.5-0.8 parts of anti-settling agent, 18-22 parts of zeolite powder, 3-5 parts of quaternary ammonium salt. In the above-mentioned formula of the present invention, the antibacterial effect of the coating in a weakly acidic environment can be further improved by more accurately regulating the synergistic effect between the components.

[0063] The epoxy resin in component A of the present invention is selected from bisphenol A epoxy resin, and this type of epoxy resin material has excellent corrosion resistance, and because the recovered waste water of treatment is slightly acidic, this type of epoxy resin is suitable for corrosion resistance under this environment, and the corrosion resistance time is long. For the selection of epoxy resin, preferably bisphenol A epoxy resin, as long as it belongs to this type, can be used for the present invention, for example, can select the bisphenol A epoxy resin of model E51, also can select other similar types of bisphenol A epoxy resin.

[0064] The zeolite powder selected in the present invention has a microporous structure and a high specific surface area, and can inhibit the growth of substances such as various bacterial colonies and microorganisms on the pipe wall through physical adsorption; further, the zeolite powder is 350-450, preferably 400 mesh; the zeolite powder is selected from at least one of analcime powder, calcium zeolite powder and sodium zeolite powder; the specific surface area of ​​the zeolite is 200-800m 2 / g. Since the coating is applied to the inner wall of the pipe for antibacterial purposes, it requires a smaller particle size. Selecting zeolite powder of this particle size is more conducive to coating the inner wall of the pipe and more conducive to its antibacterial effect. The selection of zeolite in the present invention requires that the particle size meets the above requirements. The above-mentioned types of zeolites with microporous structure, high specific surface area and physical adsorption effect can be selected.

[0065] The present invention selects quaternary ammonium salt as an antibacterial substance, and exerts its antibacterial effect by destroying the cell membrane of microorganisms. Double-chain quaternary ammonium salt can be selected, and in particular, at least one of bis-decyl dimethyl ammonium bromide, bis-decyl dimethyl ammonium chloride, octadecyl dimethyl ammonium chloride and tetramethyl ammonium oxalate can be selected as the antibacterial substance; preferably tetramethyl ammonium oxalate. The double-chain quaternary ammonium salt contains more quaternary ammonium cations, and the cations have a bactericidal effect, and the bactericidal effect of the double-chain quaternary ammonium salt is less affected by pH and temperature, and is very suitable for the acidic environment in the pipeline; for example, tetramethyl ammonium oxalate can be selected.

[0066] In order to adjust the viscosity of the epoxy resin and facilitate the subsequent coating, the present invention further adds an epoxy diluent to component A. Preferably, the epoxy diluent can be butyl glycidyl ether, which can be used in combination with the epoxy resin to achieve a good adjustment effect. The epoxy diluent of the present invention can also be other substances with similar properties.

[0067] In order to facilitate the coating to be applied and form a coating with better performance in cooperation with epoxy resin, the coupling agent of component A of the present invention is selected from silane coupling agent; for example, a silane coupling agent with a brand number of KH-560 can be selected. The defoamer of the present invention is selected from carboxyl modified silicone oil; the anti-settling agent is selected from fumed silica; and the leveling agent is at least one of poly (isooctyl) acrylate, butyl acrylate modified silicone type and fluorosilicone modified acrylate.

[0068] The defoamer, coupling agent, leveling agent and anti-settling agent in component A of the present invention can be selected as long as they can achieve the purpose of the present invention, and are not limited to the above specific types.

[0069] In order to cooperate with component A to be coated and cured to form a coating or resin film-like material, a curing agent needs to be added to component B of the present invention. In order to obtain a better curing effect, the polythiol is selected from modified polythiol; for example, the model GL S820 modified polythiol can be selected; the polythiol in component B of the present invention can meet the requirements as long as the modified polythiol is selected, and other types of modified polythiol can also be selected.

[0070] The particle size of the zeolite powder in the B component of the coating of the present invention is 350-450 meshes. Since the coating is applied to the inner wall of the pipeline for antibacterial purposes, it requires a smaller particle size. Selecting zeolite powder of this particle size is more conducive to coating the inner wall of the pipeline and more conducive to its antibacterial effect. The selection of zeolite in the present invention requires that the particle size meets the above requirements. The above-mentioned types of zeolites with microporous structures, high specific surface areas, and physical adsorption effects can be selected.

[0071] The quaternary ammonium salt in the component B of the coating of the present invention is selected from a double-chain quaternary ammonium salt, which can be selected from at least one of bis-deoxy-dimethylammonium bromide, bis-deoxy-dimethylammonium chloride, octadecyl dimethylammonium chloride and tetramethylammonium oxalate as an antibacterial substance, preferably tetramethylammonium oxalate. The double-chain quaternary ammonium salt selected by the present invention contains more quaternary ammonium cations, which have a bactericidal effect, and the bactericidal effect of the double-chain quaternary ammonium salt is less affected by pH and temperature, and is very suitable for the acidic environment in the pipeline.

[0072] The use requirements of the zeolite powder and double-chain quaternary ammonium salt of the present invention are the same as those of component A, as long as they belong to the types screened by the present invention, and other specific substances may also be selected.

[0073] In order to further obtain a better curing and molding effect, the curing accelerator in component B of the present invention is DMP-30 (phenol). The curing agent of the present invention can also be other types with similar effects.

[0074] In order to make the coating have better anti-oxidation performance, the polysiloxane is selected from modified polysiloxane, preferably polydimethylsiloxane and / or polyether phosphate modified siloxane. The present invention does not limit the specific type or material of the polysiloxane as long as it belongs to the polyether modified type.

[0075] The defoaming agent of the present invention is selected from carboxyl modified silicone oil; at least one of methyl chlorophenyl silicone oil, methyl trifluoropropyl silicone oil and methyl carboxyl silicone oil can also be selected; the anti-settling agent is selected from fumed silica.

[0076] The present invention also provides a method for preparing the coating, comprising the following steps:

[0077] Step S1: preparing various raw materials according to the formula of component A, and mixing the various raw materials to obtain component A;

[0078] Step S2: preparing various raw materials according to the formula of component B, and mixing the various raw materials to obtain component B;

[0079] Step S3: Mix component A and component B in a weight ratio of 1:1 to obtain a coating.

[0080] Preferably, in step S1, the raw materials are stirred and mixed by ultrasonic stirring to obtain component A;

[0081] Preferably, in step S2, the raw materials are stirred and mixed by ultrasonic stirring to obtain component B.

[0082] The preparation process of the antibacterial main body in the coating of the present invention is as follows Figure 1 As shown, the preparation process route of the resin body is as follows Figure 2 As shown. The present invention applies the newly developed coating to the inner wall of the equipment for antibacterial and anti-corrosion. When the coating is applied to the surface of the equipment, a large number of bacteria bred by wastewater and other materials in the equipment after long-term operation can be adsorbed, decomposed and destroyed by the coating, etc., and the coating has good corrosion resistance, which can prevent the long-term operation of wastewater and other materials from corrosive to the equipment, especially the weakly acidic recycled wastewater, which will corrode the equipment after long-term operation. For example, the inner wall of the pipe that contains recycled wastewater is often used.

[0083] The present application is further described in detail below in conjunction with specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed in the present application.

[0084] The raw materials used in the following examples and comparative examples of the present invention are all commercially available.

[0085] The epoxy resin is bisphenol A epoxy resin E51;

[0086] The diluent is butyl glycidyl ether;

[0087] The coupling agent is KH-560 silane coupling agent;

[0088] The defoaming agent is methyl carboxyl silicone oil;

[0089] The anti-settling agent is fumed silica;

[0090] Fluorosilicone modified acrylate (Dongguan Hongrui Chemical Co., Ltd.) was used for leveling;

[0091] The particle size of zeolite powder was 400 mesh, calcium zeolite (Chaoyang Xinhe Zeolite Technology Co., Ltd.);

[0092] The double-chain quaternary ammonium salt is selected from tetramethylammonium oxalate (Hubei Xinghengye Technology Co., Ltd.);

[0093] The model of polythiol is GL S820 modified polythiol (Guangzhou Green New Materials Co., Ltd.);

[0094] The curing accelerator is selected from DMP-30 curing accelerator;

[0095] The polysiloxane was selected from polydimethylsiloxane (Shenzhen Xinyongsheng New Materials Co., Ltd.).

[0096] Example 1

[0097] Step S1: prepare various raw materials according to the formula of component A, and mix the various raw materials by ultrasonic stirring to obtain component A;

[0098] 60 parts of epoxy resin, 3 parts of diluent, 0.4 parts of coupling agent, 0.4 parts of defoamer, 0.4 parts of anti-settling agent, 1 part of leveling agent, 20 parts of zeolite powder, 1 part of quaternary ammonium salt;

[0099] Step S2: preparing various raw materials according to the formula of component B, and mixing the various raw materials by ultrasonic stirring to obtain component B;

[0100] 65 parts of polythiol, 2 parts of curing accelerator, 0.4 parts of polysiloxane, 0.2 parts of defoamer, 0.2 parts of anti-settling agent, 20 parts of zeolite powder, 1 part of quaternary ammonium salt;

[0101] Step S3: Mix component A and component B in a weight ratio of 1:1 to obtain a coating.

[0102] Example 2

[0103] The difference between Example 2 and Example 1 is the formula of component A and component B:

[0104] Component A includes the following raw materials in parts by weight: 64 parts of epoxy resin, 4 parts of diluent, 0.8 parts of coupling agent, 0.8 parts of defoamer, 0.8 parts of anti-settling agent, 1.6 parts of leveling agent, 20 parts of zeolite powder, and 2 parts of quaternary ammonium salt;

[0105] Component B includes the following raw materials in parts by weight: 70 parts of polythiol, 2.6 parts of curing accelerator, 0.6 parts of polysiloxane, 0.4 parts of defoaming agent, 0.4 parts of anti-settling agent, 20 parts of zeolite powder, and 2 parts of quaternary ammonium salt.

[0106] Example 3

[0107] The difference between Example 3 and Example 1 is the formula of component A and component B:

[0108] Component A includes the following raw materials in parts by weight: 68 parts of epoxy resin, 5.6 parts of diluent, 1.2 parts of coupling agent, 1.2 parts of defoamer, 1.2 parts of anti-settling agent, 2.4 parts of leveling agent, 20 parts of zeolite powder, and 3 parts of quaternary ammonium salt;

[0109] Component B includes the following raw materials in parts by weight: 73 parts of polythiol, 3.6 parts of curing accelerator, 1.2 parts of polysiloxane, 0.6 parts of defoaming agent, 0.6 parts of anti-settling agent, 20 parts of zeolite powder, and 3 parts of quaternary ammonium salt.

[0110] Example 4

[0111] The difference between Example 4 and Example 1 is the formula of component A and component B:

[0112] Component A includes the following raw materials in parts by weight: 72 parts of epoxy resin, 7 parts of diluent, 1.6 parts of coupling agent, 1.6 parts of defoamer, 1.6 parts of anti-settling agent, 3 parts of leveling agent, 20 parts of zeolite powder, and 4 parts of quaternary ammonium salt;

[0113] Component B includes the following raw materials in parts by weight: 78 parts of polythiol, 4 parts of curing accelerator, 1.6 parts of polysiloxane, 0.8 parts of defoaming agent, 0.8 parts of anti-settling agent, 20 parts of zeolite powder, and 4 parts of quaternary ammonium salt.

[0114] Example 5

[0115] The difference between Example 5 and Example 1 is the formula of component A and component B:

[0116] Component A includes the following raw materials in parts by weight: 70 parts of epoxy resin, 5 parts of diluent, 1 part of coupling agent, 1 part of defoamer, 1 part of anti-settling agent, 2 parts of leveling agent, 20 parts of zeolite powder, and 5 parts of quaternary ammonium salt;

[0117] Component B includes the following raw materials in parts by weight: 75 parts of polythiol, 3 parts of curing accelerator, 1 part of polysiloxane, 0.5 parts of defoaming agent, 0.5 parts of anti-settling agent, 20 parts of zeolite powder, and 5 parts of quaternary ammonium salt.

[0118] The components A and B in the above five embodiments were mixed in a weight ratio of 1:1 to obtain five coating products, which were sequentially denoted as 1#, 2#, 3#, 4#, and 5#; Figure 1 and Figure 2 shown.

[0119] Comparative Example 1

[0120] Comparative Example 1 is different from Example 5 in that the formulations of component A and component B are different;

[0121] Component A includes the following raw materials in parts by weight: 70 parts of epoxy resin, 5 parts of diluent, 1 part of coupling agent, 1 part of defoaming agent, 1 part of anti-settling agent, and 2 parts of leveling agent;

[0122] Component B includes the following raw materials in parts by weight: 75 parts of polythiol, 3 parts of curing accelerator, 1 part of polysiloxane, 0.5 parts of defoaming agent, and 0.5 parts of anti-settling agent.

[0123] Comparative Example 2

[0124] The difference between the coatings of Comparative Example 2 and Examples 1 to 5 is that a 30 wt % NaOH solution is used as the antibacterial material; the solution is used to clean and wet the substrate, and the substrate is subjected to the same treatment and the treatment effect is detected.

[0125] Application Examples

[0126] The five coatings 1#, 2#, 3#, 4#, and 5# prepared in Examples 1 to 5 are represented, the coating prepared in Comparative Example 1 without adding an antibacterial main body is used as Comparative Group 1, and the NaOH solution of Comparative Example 2 is used as Comparative Group 2; the following methods are used to test the antibacterial effects of the coating products 1#, 2#, 3#, 4#, and 5# in the examples, the products in Comparative Group 1, and the alkali solution in Comparative Group 2, respectively. The results are as follows Figure 3 As shown:

[0127] (1) Apply the coating product on the surface of a plastic culture dish, let it stand for 2 hours to solidify, and then use an ultraviolet sterilization lamp in a clean bench to sterilize the coating and the culture dish for 10 minutes;

[0128] (2) Take 1 mL of the bacterial solution cultured from the bacterial colonies in the recycled water pipe and drip it onto the antibacterial coating, cover it with a sterile polyethylene film, and then place the culture dish in a constant temperature and humidity incubator at 37°C and 90% relative humidity for 24 hours;

[0129] (3) Take out the sample after 24 hours of incubation, and repeatedly rinse the coating surface and the sterile polyethylene film with 10 mL of physiological saline. Take 1 mL of the rinsing liquid and dilute it 10 times. Take the diluted rinsing liquid and inoculate it into sterile nutrient agar medium. Then place it in a constant temperature and humidity incubator at a temperature of 37°C and a relative humidity of 90% for 24 hours. Finally, count the number of colonies. The results are as follows: Figure 3 shown.

[0130] Depend on Figure 3 It can be seen that the antibacterial effect of the coating of comparative example 1 is obviously inferior to the antibacterial effect of the coating of embodiment 5 of the present invention; in embodiment 3, the antibacterial effect is relatively good; there is no strain at all in embodiments 4 and 5, indicating that the antibacterial effect of these two coatings is the best. The above experimental results show that the addition of zeolite powder and double-chain quaternary ammonium salt to component A of the present invention can significantly improve the antibacterial property of the coating, especially when the zeolite powder and double-chain quaternary ammonium salt in component A have an appropriate ratio, the coating has a very significant antibacterial effect.

[0131] The alkali solution treatment effects of the coating of the present invention and comparative example 2 were compared. After the alkali solution treatment, there were still a small number of colonies of microorganisms on the substrate, and the antibacterial effect was not obvious. In addition, the inner wall of the pipe treated with the alkali solution gradually showed corrosion over time, indicating that the antibacterial effect of the alkali solution was poor, the effect lasted for a short time, and it had a negative effect on the pipe itself, and could not meet the production requirements.

[0132] The antibacterial effect of the invention mainly comes from the synergistic effect of the zeolite powder and the diquaternary ammonium salt. The zeolite powder of the invention has a microporous structure and a high specific surface area, and can inhibit the growth of substances such as various bacterial colonies, microorganisms, etc. on the pipe wall through physical adsorption. The diquaternary ammonium salt of the invention has a strong bactericidal effect. The invention selects suitable antibacterial components and limits the ratio between the antibacterial components to make the coating as a whole have a very excellent antibacterial effect. At the same time, the invention selects epoxy resin components to make the coating as a whole have excellent corrosion resistance, and a specific ratio with other components, so that the coating of the invention has the above-mentioned technical effects and can also be well coated on the pipe wall, thereby improving its applicability.

[0133] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those described herein, for example.

[0134] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. 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 coating, characterized in that: The coating is obtained by mixing component A and component B; wherein, The A component includes the following raw materials in parts by weight: 60-80 parts of epoxy resin, 3-7 parts of diluent, 0.4-1.6 parts of coupling agent, 0.4-1.6 parts of defoaming agent, 0.4-1.6 parts of anti-settling agent, 1-3 parts of leveling agent, 16-24 parts of zeolite powder, 1-6 parts of quaternary ammonium salt; The B component includes the following raw materials in parts by weight: 65-85 parts of polythiol, 2-4 parts of curing accelerator, 0.4-1.6 parts of polysiloxane, 0.2-4 parts of defoaming agent, 0.2-0.8 parts of anti-settling agent, 16-24 parts of zeolite powder, and 1-6 parts of quaternary ammonium salt.

2. The coating according to claim 1, characterized in that The A component and the B component are mixed in a weight ratio of 1:(0.9-1.1).

3. The coating according to claim 1 or 2, characterized in that: The component A comprises the following raw materials in parts by weight: 64-76 parts of epoxy resin, 4-7 parts of diluent, 0.6-1.6 parts of coupling agent, 0.6-1.6 parts of defoaming agent, 0.6-1.6 parts of anti-settling agent, 1.5-3 parts of leveling agent, 18-24 parts of zeolite powder, and 1-5 parts of quaternary ammonium salt; And / or, the B component includes the following raw materials in parts by weight: 70-80 parts of polythiol, 2.5-4 parts of curing accelerator, 0.6-1.6 parts of polysiloxane, 0.5-2 parts of defoaming agent, 0.4-0.8 parts of anti-settling agent, 18-24 parts of zeolite powder, and 2-5 parts of quaternary ammonium salt.

4. The coating according to any one of claims 1 to 3, characterized in that The component A comprises the following raw materials in parts by weight: 68-72 parts of epoxy resin, 5-7 parts of diluent, 0.8-1.6 parts of coupling agent, 0.8-1.6 parts of defoaming agent, 0.8-1.6 parts of anti-settling agent, 2-3 parts of leveling agent, 18-22 parts of zeolite powder, and 3-5 parts of quaternary ammonium salt; And / or, the B component includes the following raw materials in parts by weight: 73-80 parts of polythiol, 3-4 parts of curing accelerator, 1-1.6 parts of polysiloxane, 0.5-1 part of defoamer, 0.5-0.8 part of anti-settling agent, 18-22 parts of zeolite powder, and 3-5 parts of quaternary ammonium salt.

5. The coating according to any one of claims 1 to 4, characterized in that: In component A, the epoxy resin is selected from bisphenol A epoxy resin; preferably, the model of the bisphenol A epoxy resin is E51; and / or, the particle size of the zeolite powder is 350-450 mesh; Preferably, the zeolite powder is selected from at least one of analcime powder, calcium zeolite powder and sodium zeolite powder; the specific surface area of ​​the zeolite is 200-800 m2 / g; And / or, the quaternary ammonium salt is selected from double-chain quaternary ammonium salts; Preferably, the quaternary ammonium salt is selected from at least one of bis-decyl dimethyl ammonium bromide, bis-decyl dimethyl ammonium chloride, octadecyl dimethyl ammonium chloride and tetramethyl ammonium oxalate; more preferably, tetramethyl ammonium oxalate.

6. The coating according to any one of claims 1 to 5, characterized in that In the component A, the diluent is selected from epoxy diluents; preferably butyl glycidyl ether; And / or, the coupling agent is selected from silane coupling agent; preferably, the brand of the silane coupling agent is KH-560; And / or, the defoamer is selected from carboxyl-modified silicone oil; preferably at least one of methylchlorophenyl silicone oil, methyltrifluoropropyl silicone oil and methylcarboxyl silicone oil; and / or, the anti-settling agent is selected from fumed silica; And / or, the leveling agent is selected from at least one of poly (isooctyl) acrylate, butyl acrylate modified silicone and fluorosilicone modified acrylate.

7. The coating according to any one of claims 1 to 6, characterized in that In the component B, the polythiol is selected from modified polythiol; preferably, the model of the modified polythiol is GL S820; and / or, the particle size of the zeolite powder is 350-450 mesh; And / or, the quaternary ammonium salt is selected from double-chain quaternary ammonium salts; Preferably, the quaternary ammonium salt is selected from at least one of bis-decyl dimethyl ammonium bromide, bis-decyl dimethyl ammonium chloride, octadecyl dimethyl ammonium chloride and tetramethyl ammonium oxalate; preferably tetramethyl ammonium oxalate.

8. The coating according to any one of claims 1 to 7, characterized in that In the component B, the curing accelerator is DMP-30 curing agent; and / or, the polysiloxane is selected from modified polysiloxanes; Preferably, the polysiloxane is selected from polydimethylsiloxane and / or polyether phosphate modified siloxane; And / or, the defoaming agent is selected from at least one of methylchlorophenyl silicone oil, methyltrifluoropropyl silicone oil and methylcarboxyl silicone oil; And / or, the anti-settling agent is selected from fumed silica.

9. The method for preparing the coating according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: Step S1: preparing various raw materials according to the formula of component A, and mixing the various raw materials to obtain the component A; Step S2: preparing various raw materials according to the formula of component B, and mixing the various raw materials to obtain the component B; Step S3: mixing the component A and the component B in a weight ratio of 1:(0.9-1.1) to obtain the coating; Preferably, in step S1, the raw materials are stirred and mixed by ultrasonic stirring to obtain the component A; Preferably, in step S2, the raw materials are stirred and mixed by ultrasonic means to obtain the B component.

10. The coating according to any one of claims 1 to 8 or the coating prepared by the method according to claim 9 is applied to the inner wall of the equipment for antibacterial and anti-corrosion; preferably, applied to the inner wall of the pipe; preferably, applied to the inner wall of the wastewater treatment pipe.

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