CN109836956B - Preparation method of water-based epoxy anti-rust primer - Google Patents
Preparation method of water-based epoxy anti-rust primer Download PDFInfo
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Abstract
The invention discloses a preparation method of a water-based epoxy anti-rust primer, and belongs to the technical field of paint preparation. The invention firstly carries out surface treatment on the nano-fiber, then loads water-based antirust agent lithium silicate on the nano-fiber to obtain a modified fiber antirust agent, modifies epoxy resin by using a modified fiber antirust agent and monomer mixed liquid to obtain a modified water-based epoxy resin emulsion, finally mixes and grinds the water-based epoxy resin emulsion, water, mica powder and other substances to obtain a component A, and mixes a curing agent which is a component B when in use to obtain the water-based epoxy antirust primer.
Description
Technical Field
The invention belongs to the technical field of paint preparation, and particularly relates to a preparation method of a water-based epoxy anti-rust primer.
Background
The antirust paint is formed by coating a layer of anticorrosive coating with good compactness and adhesion on the surface of a metal base material, so that a corrosive medium (moisture, oxygen, corrosive ions and the like) is prevented from directly contacting the metal base material, the generation of corrosive current is inhibited, and the antirust effect of the metal is achieved. At present, the traditional antirust paint not only contains a large amount of volatile organic solvents, but also contains a plurality of toxic pigments and fillers, and the wide use of the traditional antirust paint causes great pollution to the environment. With the enhancement of environmental awareness, people pay more and more attention to the environmental protection problem of the protective coating, so that the paint industry is promoted to develop towards low toxicity/non-toxicity and little pollution to the environment. Therefore, the water-based rust inhibitive paint is an important development direction of the rust inhibitive paint.
Among them, the water-based epoxy rust-inhibiting primer is widely used in the heavy-duty anticorrosion fields of ships, inner and outer walls of pipelines, mine steel frames, airplanes, high-speed trains and the like. Earlier people generally made epoxy emulsions by mechanical and phase inversion methods. Namely, a water-insoluble epoxy resin is dispersed in water in a particulate state by means of a high-speed stirring apparatus in the presence of an emulsifier. The two methods have simple process, but have a plurality of defects, and the obtained emulsion has larger particle size, irregular particle shape, wide size distribution, poor emulsion stability and the like.
However, the water-based epoxy resin is a thermodynamically unstable system, the storage stability is poor and the comprehensive performance of the coating is unsatisfactory, so that the water resistance and the rust resistance of the water-based epoxy resin coating are poor and the performance requirement of the rust-resistant coating can not be met.
At present, the contradiction between the storage stability of the aqueous dispersion of the aqueous antirust paint and the water resistance and corrosion resistance of the coating film of the dispersion is a big bottleneck for restricting the development of the aqueous epoxy resin antirust paint. Therefore, research and development of water-based antirust paint which has good storage stability, excellent coating film and corrosion resistance is urgent, and considerable economic and social benefits are achieved.
In conclusion, the technical key for popularizing and applying the water-based epoxy anti-rust primer is to solve the problems.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: aiming at the defects that the water-based epoxy resin coating has poor water resistance and poor antirust performance and cannot meet the performance requirement of an antirust coating due to poor storage stability and unsatisfactory comprehensive performance of the coating, the preparation method of the water-based epoxy antirust primer is provided.
In order to solve the technical problems, the invention adopts the following technical scheme:
(1) weighing nano-fibers, adding the nano-fibers into an ethanol solution of ammonia, soaking, then carrying out suction filtration, collecting filter residues, washing with absolute ethyl alcohol and water in sequence, and then drying to obtain surface-treated nano-fibers;
(2) preparing a lithium nitrate solution with the mass fraction of 5%, weighing the nanofiber, the lithium nitrate solution and disodium ethylene diamine tetraacetate with the surface treated according to the mass ratio of 5-10: 30-50: 1-2, stirring and mixing for 20-30 min, then dropwise adding an active silicic acid solution, continuously stirring for 1-2 h, standing at room temperature for 5-7 h, standing, then putting into an oven for drying, putting into a tubular furnace after obtaining a dried substance, heating to 400-500 ℃ under the protection of nitrogen atmosphere, preserving heat, calcining, then adding into a pulverizer for pulverizing, and sieving with a 500-mesh sieve to obtain a modified fiber antirust agent;
(3) weighing epoxy resin and absolute ethyl alcohol, filling the epoxy resin and the absolute ethyl alcohol into a three-neck flask, stirring and mixing for 30-40 min, adding phosphoric acid, heating to reflux, performing reflux reaction for 1-2 h, adding a monomer mixed solution, a fiber antirust agent and an initiator, heating to 105-120 ℃, stirring and reacting for 3-4 h, cooling to 60-70 ℃, adjusting a reaction system to be neutral, adding water, stirring at a rotating speed of 1200-2000 r/min for 30-40 min, cooling to room temperature after stirring, and discharging to obtain a modified water-based epoxy resin emulsion;
(4) respectively weighing and mixing the modified waterborne epoxy resin emulsion, water, mica powder, aluminum tripolyphosphate, magnesium humate, a dispersing agent, a defoaming agent, a wetting agent, a leveling agent and magnesium humate, uniformly mixing, adding into a grinding machine for grinding, and sieving by a filter screen of 80-100 meshes to obtain a component A, wherein a curing agent is a component B;
(5) and respectively packaging the component A and the component B, mixing when in use, and uniformly mixing to obtain the water-based epoxy antirust primer.
In the step (1), the nano fiber is one of polyimide fiber, polyester fiber, hemp fiber, bamboo fiber or carbon fiber.
The adding amount of the active silicic acid solution in the step (2) is 1-1.5 times of the mass of the lithium nitrate solution; the preparation method of the active silicic acid solution comprises the following steps: preparing a sodium silicate aqueous solution with the mass fraction of 3%, performing exchange reaction by using cation exchange resin, and collecting to obtain an active silicic acid solution.
The epoxy resin in the step (3) is one of E51 epoxy resin, E44 epoxy resin or E42 epoxy resin.
The monomer mixed solution in the step (3) is as follows: according to the mass ratio of 3: 1: 1, weighing methacrylic acid, butyl acrylate and styrene, adding into absolute ethyl alcohol, and uniformly stirring and mixing to obtain a monomer mixed solution; the initiator is ammonium persulfate or potassium persulfate.
Weighing 50-70 parts of modified water-based epoxy resin emulsion, 10-20 parts of water, 1-5 parts of mica powder, 1-3 parts of aluminum tripolyphosphate, 0.3-0.5 part of dispersing agent, 0.5-1.0 part of defoaming agent, 0.5-1.0 part of wetting agent, 0.1-0.2 part of flatting agent, 0.1-0.3 part of magnesium humate and 12-20 parts of curing agent according to parts by weight.
The dispersant is SN-5029 dispersant or dispersant X-3204; the defoaming agent is an A-10 defoaming agent or an SN-1311 defoaming agent; the wetting agent is BYK-346; the leveling agent is polyether modified polysiloxane; the curing agent is formed by mixing polysebacic anhydride and polyazelaic anhydride according to the mass ratio of 1: 3.
Compared with other methods, the method has the beneficial technical effects that:
(1) the modified fiber antirust agent is obtained by loading lithium silicate on the surface of the nanofiber, has stable property, is non-toxic and harmless, is an excellent water-based antirust agent, is uniformly and stably dispersed in water-based epoxy resin after being added into water-based epoxy resin emulsion, can be filled into holes and defects of a coating, forms a compact physical isolation layer which is superposed layer by layer, is crosslinked with the epoxy resin under the action of an initiator, and enhances the interaction between fiber and a resin matrix interface as active hydroxyl on the surface of the fiber and the crosslinking network of the epoxy resin generate intermolecular hydrogen bonds;
(2) according to the invention, methacrylic acid, butyl acrylate and styrene are used as monomers to prepare a monomer mixed solution, hydrophilic groups can be introduced into an epoxy resin molecular chain through chemical grafting after the monomer mixed solution is added, and stable dispersion of epoxy resin in water is realized after neutralization and salt formation;
(3) after the water-based epoxy anti-rust primer prepared by the invention is used, phosphate ions and tripolyphosphate ions can be dissociated from the coating and form a compact attached film with base metal ions, so that rusting is inhibited, and mica is selected as a filler, so that the permeability of water and oxygen in the air to a paint film can be effectively slowed down, and the anti-rust purpose is achieved;
(4) the water-based epoxy anti-rust primer prepared by the invention has good storage stability and film-forming property, and the paint film has excellent water resistance, salt spray resistance and anti-rust property, the salt spray resistance can reach more than 1600 hours, and the water-based epoxy anti-rust primer is beneficial to protecting the substrate by the paint film.
Detailed Description
The invention is described in more detail below with reference to the following examples:
example 1
The method comprises the following steps: preparation of modified fiber antirust agent
(1) Weighing 50g of polyimide nano fiber, adding the polyimide nano fiber into 200g of ethanol solution containing 5% ammonia by mass, soaking, carrying out suction filtration after 30min, collecting filter residue, washing with absolute ethyl alcohol and water in sequence, and drying to obtain the nano fiber after surface treatment;
(2) preparing a sodium silicate aqueous solution with the mass fraction of 3%, performing exchange reaction by using cation exchange resin, and collecting to obtain an active silicic acid solution;
(3) preparing a lithium nitrate solution with the mass fraction of 5%, weighing the nano-fiber, the lithium nitrate solution and the disodium ethylene diamine tetraacetate with the surface treated according to the mass ratio of 5:30:1, stirring and mixing for 20min, then dropwise adding an active silicic acid solution with the mass of 1 time of that of the lithium nitrate solution, continuously stirring for 1h, standing at room temperature for 5h, drying in a drying oven after standing to obtain a dried substance, then placing in a tubular furnace, heating to 400 ℃ under the protection of nitrogen atmosphere, preserving heat, calcining, then adding in a pulverizer for pulverizing, and sieving with a 500-mesh sieve to obtain the modified fiber antirust agent;
step two: modified aqueous epoxy resin emulsion
(1) According to the mass ratio of 3: 1: 1, weighing methacrylic acid, butyl acrylate and styrene, adding into absolute ethyl alcohol, and uniformly stirring and mixing to obtain a monomer mixed solution;
(2) weighing 60g of epoxy resin E51 and 200g of absolute ethyl alcohol, placing the epoxy resin E51 and the absolute ethyl alcohol into a three-neck flask, stirring and mixing for 30min, adding 4g of phosphoric acid, heating to reflux, adding 8g of monomer mixed solution, 3g of fiber antirust agent and 1g of ammonium persulfate after reflux reaction for 1h, heating to 105 ℃, stirring and reacting for 3h, cooling to 60 ℃, adjusting the reaction system to be neutral, adding 30g of water, stirring for 30min at the rotating speed of 1200r/min, stirring, cooling to room temperature, and discharging to obtain the modified waterborne epoxy resin emulsion.
Step three: preparation of aqueous epoxy antirust primer
(1) Weighing 100g of modified waterborne epoxy resin emulsion, 20g of water, 2g of mica powder, 2g of aluminum tripolyphosphate, 0.6g of dispersing agent SN-5029, 1g of defoaming agent A-10, 1g of wetting agent BYK-346, 0.2g of polyether modified polysiloxane and 0.2g of magnesium humate, uniformly mixing, adding into a grinder for grinding, and sieving by a 80-mesh filter screen to obtain a component A; weighing 6g of polysebacic anhydride and 18g of polyazelaic anhydride, mixing and stirring uniformly to obtain a component B;
(2) and respectively packaging the component A and the component B, mixing when in use, and uniformly mixing to obtain the water-based epoxy antirust primer.
Example 2
The method comprises the following steps: preparation of modified fiber antirust agent
(1) Weighing 60g of nano bamboo fiber, adding the nano bamboo fiber into 225g of ethanol solution containing 5% by mass of ammonia, soaking, carrying out suction filtration after 40min, collecting filter residue, washing with absolute ethyl alcohol and water in sequence, and drying to obtain surface-treated nano fiber;
(2) preparing a sodium silicate aqueous solution with the mass fraction of 3%, performing exchange reaction by using cation exchange resin, and collecting to obtain an active silicic acid solution;
(3) preparing a lithium nitrate solution with the mass fraction of 5%, weighing the nano-fiber, the lithium nitrate solution and the disodium ethylene diamine tetraacetate with the surface treated according to the mass ratio of 7:40:1, stirring and mixing for 25min, then dropwise adding an active silicic acid solution which is 1.3 times of the mass of the lithium nitrate solution, continuously stirring for 1.5h, standing at room temperature for 6h, standing, then putting into a drying oven for drying to obtain a dried substance, then putting into a tubular furnace, heating to 450 ℃ under the protection of nitrogen atmosphere, preserving heat, calcining, then adding into a pulverizer for pulverizing, and sieving with a 500-mesh sieve to obtain a modified fiber antirust agent;
step two: modified aqueous epoxy resin emulsion
(1) According to the mass ratio of 3: 1: 1, weighing methacrylic acid, butyl acrylate and styrene, adding into absolute ethyl alcohol, and uniformly stirring and mixing to obtain a monomer mixed solution;
(2) weighing 70g of epoxy resin E44 and 230g of absolute ethyl alcohol, putting into a three-neck flask, stirring and mixing for 35min, adding 6g of phosphoric acid, heating to reflux, adding 10g of monomer mixed solution, 4g of fiber antirust agent and 2g of potassium persulfate after reflux reaction for 1.5h, heating to 110 ℃, stirring and reacting for 3.5h, cooling to 65 ℃, adding 40g of water after adjusting a reaction system to be neutral, stirring for 35min at a rotating speed of 1600r/min, stirring, cooling to room temperature, and discharging to obtain the modified waterborne epoxy resin emulsion.
Step three: preparation of aqueous epoxy antirust primer
(1) Weighing 120g of modified waterborne epoxy resin emulsion, 30g of water, 5g of mica powder, 4g of aluminum tripolyphosphate, 0.8g of dispersing agent SN-5029, 1.5g of defoaming agent SN-1311, 1.5g of wetting agent BYK-346, 0.3g of polyether modified polysiloxane and 0.4g of magnesium humate, uniformly mixing, adding into a grinding machine for grinding, and sieving by a 80-mesh filter screen to obtain a component A; weighing 8g of polysebacic anhydride and 24g of polyazelaic anhydride, mixing and stirring uniformly to obtain a component B;
(2) and respectively packaging the component A and the component B, mixing when in use, and uniformly mixing to obtain the water-based epoxy antirust primer.
Example 3
The method comprises the following steps: preparation of modified fiber antirust agent
(1) Weighing 70g of carbon nanofiber, adding the carbon nanofiber into 250g of ethanol solution containing 5% by mass of ammonia, soaking, carrying out suction filtration after 50min, collecting filter residues, washing with absolute ethyl alcohol and water in sequence, and drying to obtain surface-treated nanofiber;
(2) preparing a sodium silicate aqueous solution with the mass fraction of 3%, performing exchange reaction by using cation exchange resin, and collecting to obtain an active silicic acid solution;
(3) preparing a lithium nitrate solution with the mass fraction of 5%, weighing the nano-fiber, the lithium nitrate solution and the disodium ethylene diamine tetraacetate with the surface treated according to the mass ratio of 10:50:2, stirring and mixing for 30min, then dropwise adding an active silicic acid solution which is 1.5 times of the mass of the lithium nitrate solution, continuously stirring for 2h, standing for 7h at room temperature, drying in a drying oven after standing to obtain a dried substance, then putting in a tubular furnace, heating to 500 ℃ under the protection of nitrogen atmosphere, preserving heat, calcining, adding in a pulverizer for pulverizing, and sieving with a 500-mesh sieve to obtain the modified fiber antirust agent;
step two: modified aqueous epoxy resin emulsion
(1) According to the mass ratio of 3: 1: 1, weighing methacrylic acid, butyl acrylate and styrene, adding into absolute ethyl alcohol, and uniformly stirring and mixing to obtain a monomer mixed solution;
(2) weighing 80g of epoxy resin E42 and 250g of absolute ethyl alcohol, putting into a three-neck flask, stirring and mixing for 40min, adding 8g of phosphoric acid, heating to reflux, adding 12g of monomer mixed solution, 5g of fiber antirust agent and 3g of ammonium persulfate after reflux reaction for 2h, heating to 120 ℃, stirring and reacting for 4h, cooling to 70 ℃, adding 50g of water after adjusting a reaction system to be neutral, stirring for 40min at a rotating speed of 2000r/min, cooling to room temperature after stirring, and discharging to obtain the modified waterborne epoxy resin emulsion.
Step three: preparation of aqueous epoxy antirust primer
(1) Weighing 140g of modified waterborne epoxy resin emulsion, 40g of water, 10g of mica powder, 6g of aluminum tripolyphosphate, 1.0g of dispersant X-3204, 2g of defoamer SN-1311, 2g of wetting agent BYK-346, 0.4g of polyether modified polysiloxane and 0.6g of magnesium humate, uniformly mixing, adding into a grinder for grinding, and sieving by a 80-mesh filter screen to obtain a component A; weighing 10g of polysebacic anhydride and 30g of polyazelaic anhydride, mixing and stirring uniformly to obtain a component B;
(2) and respectively packaging the component A and the component B, mixing when in use, and uniformly mixing to obtain the water-based epoxy antirust primer.
Comparative example 1
Compared with the example 1, the modified fiber antirust agent is not prepared, the modified fiber antirust agent is not added into the modified water-based epoxy resin emulsion, and the rest operation steps are unchanged;
the method comprises the following steps: modified aqueous epoxy resin emulsion
(1) According to the mass ratio of 3: 1: 1, weighing methacrylic acid, butyl acrylate and styrene, adding into absolute ethyl alcohol, and uniformly stirring and mixing to obtain a monomer mixed solution;
(2) weighing 70g of epoxy resin E44 and 230g of absolute ethyl alcohol, putting into a three-neck flask, stirring and mixing for 35min, adding 6g of phosphoric acid, heating to reflux, adding 10g of monomer mixed solution and 2g of potassium persulfate after reflux reaction for 1.5h, heating to 110 ℃, stirring and reacting for 3.5h, cooling to 65 ℃, adjusting the reaction system to be neutral, adding 40g of water, stirring for 35min at a rotating speed of 1600r/min, stirring, cooling to room temperature, and discharging to obtain the modified waterborne epoxy resin emulsion.
Step two: preparation of aqueous epoxy antirust primer
(1) Weighing 120g of modified waterborne epoxy resin emulsion, 30g of water, 5g of mica powder, 4g of aluminum tripolyphosphate, 0.8g of dispersing agent SN-5029, 1.5g of defoaming agent SN-1311, 1.5g of wetting agent BYK-346, 0.3g of polyether modified polysiloxane and 0.4g of magnesium humate, uniformly mixing, adding into a grinding machine for grinding, and sieving by a 80-mesh filter screen to obtain a component A; weighing 10g of polysebacic anhydride and 30g of polyazelaic anhydride, mixing and stirring uniformly to obtain a component B;
(2) and respectively packaging the component A and the component B, mixing when in use, and uniformly mixing to obtain the water-based epoxy antirust primer.
Comparative example 2
Compared with the embodiment 2, the monomer mixed solution is not added into the modified waterborne epoxy resin emulsion, but the emulsifier is added, and the operation steps are as follows;
the method comprises the following steps: preparation of modified fiber antirust agent
(1) Weighing 60g of nano bamboo fiber, adding the nano bamboo fiber into 225g of ethanol solution containing 5% by mass of ammonia, soaking, carrying out suction filtration after 40min, collecting filter residue, washing with absolute ethyl alcohol and water in sequence, and drying to obtain surface-treated nano fiber;
(2) preparing a sodium silicate aqueous solution with the mass fraction of 3%, performing exchange reaction by using cation exchange resin, and collecting to obtain an active silicic acid solution;
(3) preparing a lithium nitrate solution with the mass fraction of 5%, weighing the nano-fiber, the lithium nitrate solution and the disodium ethylene diamine tetraacetate with the surface treated according to the mass ratio of 7:40:1, stirring and mixing for 25min, then dropwise adding an active silicic acid solution which is 1.3 times of the mass of the lithium nitrate solution, continuously stirring for 1.5h, standing at room temperature for 6h, standing, then putting into a drying oven for drying to obtain a dried substance, then putting into a tubular furnace, heating to 450 ℃ under the protection of nitrogen atmosphere, preserving heat, calcining, then adding into a pulverizer for pulverizing, and sieving with a 500-mesh sieve to obtain a modified fiber antirust agent;
step two: modified aqueous epoxy resin emulsion
(1) Weighing 70g of epoxy resin E44 and 230g of absolute ethyl alcohol, filling the epoxy resin E44 and the absolute ethyl alcohol into a three-neck flask, stirring and mixing for 35min, adding 6g of phosphoric acid, heating to reflux, adding 4g of fiber antirust agent, 8g of sodium dodecyl sulfate and 2g of potassium persulfate after reflux reaction for 1.5h, cooling to 70 ℃, stirring and reacting for 2h, adding water after reaction, stirring for 30min at the rotating speed of 3000r/min, cooling to room temperature after stirring, and discharging to obtain the modified waterborne epoxy resin emulsion.
Step three: preparation of aqueous epoxy antirust primer
(1) Weighing 120g of modified waterborne epoxy resin emulsion, 30g of water, 5g of mica powder, 4g of aluminum tripolyphosphate, 0.8g of dispersing agent SN-5029, 1.5g of defoaming agent SN-1311, 1.5g of wetting agent BYK-346, 0.3g of polyether modified polysiloxane and 0.4g of magnesium humate, uniformly mixing, adding into a grinding machine for grinding, and sieving by a 80-mesh filter screen to obtain a component A; weighing 8g of polysebacic anhydride and 24g of polyazelaic anhydride, mixing and stirring uniformly to obtain a component B;
(2) and respectively packaging the component A and the component B, mixing when in use, and uniformly mixing to obtain the water-based epoxy antirust primer.
The examples 1 to 3 and comparative examples 1 to 2 were subjected to performance tests, and the test results are shown in Table 1.
Table 1:
as can be seen from the data in Table 1, the waterborne epoxy anti-rust primers prepared by the method of the invention in examples 1-3 have excellent adhesion, water resistance, storage stability and other properties, while the modified fiber anti-rust agent is not added in comparative example 1, the water resistance and the salt spray resistance are poor, while the waterborne epoxy emulsion prepared by the emulsification method with the emulsifier is used in comparative example 2, and the emulsion breaking and delamination phenomenon occurs after the emulsion is stored for 12 months.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all such changes or substitutions should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A preparation method of a water-based epoxy anti-rust primer is characterized by comprising the following specific preparation steps:
(1) weighing nano-fibers, adding the nano-fibers into an ethanol solution of ammonia, soaking, then carrying out suction filtration, collecting filter residues, washing with absolute ethyl alcohol and water in sequence, and then drying to obtain surface-treated nano-fibers;
(2) preparing a lithium nitrate solution with the mass fraction of 5%, weighing the nanofiber, the lithium nitrate solution and disodium ethylene diamine tetraacetate with the surface treated according to the mass ratio of 5-10: 30-50: 1-2, stirring and mixing for 20-30 min, then dropwise adding an active silicic acid solution, continuously stirring for 1-2 h, standing at room temperature for 5-7 h, standing, then putting into an oven for drying, putting into a tubular furnace after obtaining a dried substance, heating to 400-500 ℃ under the protection of nitrogen atmosphere, preserving heat, calcining, crushing, and sieving with a 500-mesh sieve to obtain a modified fiber antirust agent;
(3) weighing epoxy resin and absolute ethyl alcohol, filling the epoxy resin and the absolute ethyl alcohol into a three-neck flask, stirring and mixing for 30-40 min, adding phosphoric acid, heating to reflux, performing reflux reaction for 1-2 h, adding a monomer mixed solution, a modified fiber antirust agent and an initiator, heating to 105-120 ℃, stirring and reacting for 3-4 h, cooling to 60-70 ℃, adjusting a reaction system to be neutral, adding water, stirring at a rotating speed of 1200-2000 r/min for 30-40 min, cooling to room temperature after stirring, and discharging to obtain a modified water-based epoxy resin emulsion;
(4) respectively weighing and mixing the modified waterborne epoxy resin emulsion, water, mica powder, aluminum tripolyphosphate, a dispersing agent, a defoaming agent, a wetting agent, a flatting agent and magnesium humate, uniformly mixing, adding into a grinding machine for grinding, and passing through a filter screen of 80-100 meshes after grinding to obtain a component A, wherein a curing agent is a component B;
(5) and respectively packaging the component A and the component B, mixing when in use, and uniformly mixing to obtain the water-based epoxy antirust primer.
2. The method for preparing the water-based epoxy rust inhibitive primer according to claim 1, characterized in that: in the step (1), the nano fiber is one of polyimide fiber, polyester fiber, hemp fiber, bamboo fiber or carbon fiber.
3. The method for preparing the water-based epoxy rust inhibitive primer according to claim 1, characterized in that: the adding amount of the active silicic acid solution in the step (2) is 1-1.5 times of the mass of the lithium nitrate solution; the preparation method of the active silicic acid solution comprises the following steps: preparing a sodium silicate aqueous solution with the mass fraction of 3%, performing exchange reaction by using cation exchange resin, and collecting to obtain an active silicic acid solution.
4. The method for preparing the water-based epoxy rust inhibitive primer according to claim 1, characterized in that: the epoxy resin in the step (3) is one of E51 epoxy resin, E44 epoxy resin or E42 epoxy resin.
5. The method for preparing the water-based epoxy rust inhibitive primer according to claim 1, characterized in that: the monomer mixed solution in the step (3) is as follows: according to the mass ratio of 3: 1: 1, weighing methacrylic acid, butyl acrylate and styrene, adding into absolute ethyl alcohol, and uniformly stirring and mixing to obtain a monomer mixed solution; the initiator is ammonium persulfate or potassium persulfate.
6. The method for preparing the water-based epoxy rust inhibitive primer according to claim 1, characterized in that: weighing 50-70 parts of modified water-based epoxy resin emulsion, 10-20 parts of water, 1-5 parts of mica powder, 1-3 parts of aluminum tripolyphosphate, 0.3-0.5 part of dispersing agent, 0.5-1.0 part of defoaming agent, 0.5-1.0 part of wetting agent, 0.1-0.2 part of flatting agent, 0.1-0.3 part of magnesium humate and 12-20 parts of curing agent according to parts by weight.
7. The method for preparing the water-based epoxy rust inhibitive primer according to claim 1 or 6, characterized in that: the dispersant is SN-5029 dispersant or dispersant X-3204; the defoaming agent is an A-10 defoaming agent or an SN-1311 defoaming agent; the wetting agent is BYK-346; the leveling agent is polyether modified polysiloxane; the curing agent is formed by mixing polysebacic anhydride and polyazelaic anhydride according to the mass ratio of 1: 3.
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| US6596406B2 (en) * | 2000-12-28 | 2003-07-22 | Nitto Denko Corporation | Wiring board prepreg and manufacturing method thereof |
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| CN102782055A (en) * | 2010-02-26 | 2012-11-14 | 新日本制铁株式会社 | Corrosion-proofing coating composition and process for production thereof, and method for prevention of corrosion in steel material |
| CN103342939A (en) * | 2013-06-27 | 2013-10-09 | 天长市巨龙车船涂料有限公司 | Water-soluble epoxy ester antirust paint |
| CN103972501A (en) * | 2014-03-03 | 2014-08-06 | 南昌大学 | Preparation method of high-purity lithium silicate material |
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Address after: 213164 No.205, Fenglin South Road, Wujin national high tech Industrial Development Zone, Changzhou City, Jiangsu Province Patentee after: Jiangsu Jinhua heavy anticorrosive coating Co.,Ltd. Address before: 213164 No.205, Fenglin South Road, Wujin national high tech Industrial Development Zone, Changzhou City, Jiangsu Province Patentee before: SHANGHAI ZHENHUA HEAVY INDUSTRY CHANGZHOU COATINGS Co.,Ltd. |