CN115466554A - Long-acting anticorrosion graphene modified waterborne epoxy zinc-rich primer and preparation method thereof - Google Patents
Long-acting anticorrosion graphene modified waterborne epoxy zinc-rich primer and preparation method thereof Download PDFInfo
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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Abstract
The invention belongs to the technical field of water-based anticorrosive coatings, and particularly discloses a long-acting anticorrosive graphene modified water-based epoxy zinc-rich primer and a preparation method thereof. The primer consists of a component A and a component B, wherein the component A comprises: 2.2 to 3.0 percent of modified aliphatic amine waterborne epoxy curing agent, 3.0 to 5.0 percent of waterborne polyamidoamine epoxy curing agent, 2.0 to 4.0 percent of film forming additive 1,1.0 to 3.0 percent of film forming additive 2, 24.0 to 30.0 percent of 800-mesh spherical zinc powder, 40.0 to 50.0 percent of 1000-mesh flaky zinc powder, 6.0 to 10.0 percent of composite filler, 0.1 to 0.5 percent of dispersant, 0.1 to 0.5 percent of defoaming agent, 1.0 to 1.4 percent of anti-settling agent 1,1.0 to 1.8 percent of anti-settling agent 2,0.8 to 1.2 percent of anti-settling agent 3,3.6 to 6.4 percent of other components; wherein the sum of the weight percentages of the A components is one hundred percent. The component B comprises 70.0 to 82.0 percent of epoxy emulsion, 15.0 to 25.0 percent of graphene water-based slurry, 1.0 to 3.0 percent of flash rust inhibitor, 0.2 to 0.8 percent of thickener, 1.0 to 2.0 percent of water and other components; wherein the sum of the weight percentages of the B components is one hundred percent.
Description
Technical Field
The invention belongs to the technical field of water-based anticorrosive coatings, and particularly relates to a long-acting anticorrosive graphene modified water-based epoxy zinc-rich primer and a preparation method thereof.
Background
Along with the implementation and popularization of national infrastructure, steel structures are used more and more, and the solvent type epoxy zinc-rich primer has excellent corrosion resistance, so that the primer becomes the most common and important primer for protecting steel. However, the waterborne epoxy zinc-rich primer has high VOC content and very serious pollution to the atmospheric environment, and the waterborne epoxy zinc-rich primer is produced in the current situation of environmental protection and air pollution prevention in China, has the excellent performances of good corrosion resistance, strong adhesive force and the like of the solvent type epoxy zinc-rich primer, and has the advantages of low VOC content, safety, environmental friendliness and the like.
Generally, zinc dust content determines the corrosion protection performance of waterborne epoxy zinc-rich coatings, and higher zinc dust content tends to provide coatings with better corrosion protection performance. However, the high zinc powder content also brings about a series of problems, such as non-environmental friendliness, large quality, high cost, and the like, and serious bottom sinking phenomenon is easy to occur during storage. At the initial stage of coating protection, the epoxy zinc-rich primer takes the cathode protection effect as the main part, and after the primer is soaked in a corrosive medium for 168 hours, part of zinc powder is oxidized into zinc salt without conductivity, so that the interconnection between the zinc powder is weakened, the service efficiency of the zinc powder is also influenced to a certain extent, and at the moment, the coating protection takes the shielding effect as the main part. Therefore, how to reduce the content of metal zinc of the epoxy zinc-rich primer while ensuring the excellent corrosion resistance of the epoxy zinc-rich primer and improve the utilization rate of the zinc powder has important research significance and market value.
In the current industrial protective coating market, particularly in the field of heavy corrosion prevention, the salt spray resistance, the mechanical property, the long-acting corrosion resistance, the material cost, the sinking resistance, the sagging resistance and the like of the water-based coating can not be comparable to those of the traditional solvent-based coating. The development of a water-based epoxy zinc-rich primer which has long-acting corrosion resistance, proper cost, long storage stability and good anti-sagging performance is an important problem which is not slow for water-based paint workers.
The present invention has been made based on such a situation.
Disclosure of Invention
The invention aims to provide a long-acting anticorrosion graphene modified water-based epoxy zinc-rich primer which is good in storage stability, excellent in salt spray resistance, strong in adhesive force, good in impact resistance, high in hardness, good in water resistance, strong in sagging resistance, moderate in cost, low in VOC (volatile organic compound) content, healthy, environment-friendly and convenient to construct, and can be widely applied to primer coating of the surface of a metal substrate in the heavy anticorrosion field. The invention also aims to provide a preparation method of the long-acting anticorrosion graphene modified waterborne epoxy zinc-rich primer.
In order to achieve the purpose, the invention adopts the following technical scheme:
the long-acting anti-corrosion graphene modified waterborne epoxy zinc-rich primer consists of a component A and a component B in percentage by weight as follows:
component A
Wherein the sum of the weight percentages of the A components is one hundred percent.
B component
Wherein the sum of the weight percentages of the B components is one hundred percent.
In the invention, the modified aliphatic amine waterborne epoxy curing agent and the waterborne polyamidoamine epoxy curing agent in the component A are waterborne amine epoxy curing agents.
In the present invention, the weight ratio of the modified fatty amine aqueous epoxy hardener to the aqueous polyamidoamine epoxy hardener is (0.5-0.8): 1.
The aliphatic curing agent has the advantages of high reaction speed, strong adhesive property, good flexibility and the like, but the activation period (POT LIFE) of the aliphatic curing agent is short; the amide curing agent paint has good adhesive force, good flexibility, longer working life, no pungent smell and slightly low reaction speed. The long-acting anticorrosion graphene modified water-based epoxy zinc-rich primer disclosed by the invention is prepared from a modified fatty amine water-based epoxy curing agent and a water-based polyamidoamine epoxy curing agent according to a certain weight ratio, and a paint film has the advantages of higher drying speed, longer activation period, excellent paint film adhesion, excellent impact resistance, excellent anticorrosion performance and the like.
In the invention, the film forming additive 1 is ethylene glycol butyl ether, and the film forming additive 2 is dipropylene glycol butyl ether. Furthermore, the weight ratio of the film forming assistant 1 to the film forming assistant 2 is (1.2-1.8): 1.
In the invention, the zinc powder in the component A comprises two kinds, namely 800-mesh spherical zinc powder and 1000-mesh flaky zinc powder.
In the invention, the weight ratio of the 800-mesh spherical zinc powder to the 1000-mesh flaky zinc powder in the component A is (0.4-0.8): 1.
The flaky zinc powder has the advantages of strong shielding effect, good anti-settling property, small zinc powder consumption and the like, but is not easy to disperse; spherical zinc powders have a weak shielding effect and a slightly poor settling resistance, but are more easily dispersed than flaky zinc powders. Under the conditions of the same paint film thickness and certain total zinc powder consumption, along with the increase of the weight ratio of spherical zinc powder to flaky zinc powder, water, oxygen and ions are easier to diffuse in the coating, the shielding effect is poor, and the corrosion resistance of the coating is relatively poor. On the contrary, the content of the flaky zinc powder is relatively increased along with the reduction of the weight ratio of the spherical zinc powder to the flaky zinc powder, the spherical zinc powder has only a few layers under the condition of the same paint film thickness, and the flaky zinc powder can reach hundreds of layers, and a parallel overlapping and overlapping arrangement system is formed in the coating, so that the porosity of the coating is reduced, the shielding property of the coating is improved, the diffusion of water, oxygen and ions in the coating is obviously reduced, and the corrosion resistance of the coating is greatly improved. However, when the ratio of spherical zinc powder to flaky zinc powder is reduced to a certain weight ratio, the pigment is mainly flaky zinc powder, and the flaky structure reduces the diffusion of water, oxygen, and ions in the coating layer, showing that the water resistance gradually becomes better, but flaky zinc powder fails at a higher rate than spherical zinc powder, and thus the salt water and salt spray resistance are rather deteriorated. In view of the above, in order to further improve the high resistance of the aqueous zinc-rich primer, the weight ratio of the 800 mesh spherical zinc powder to the 1000 mesh flaky zinc powder was determined to be (0.4 to 0.8): 1.
In the invention, the composite filler in the component A is a mixture of talcum powder, zinc phosphate, titanium dioxide and barium sulfate. Furthermore, the weight ratio of the talcum powder to the zinc phosphate to the titanium dioxide to the barium sulfate in the composite filler is (1.5-1.8): 0.8-1.2): 1.
The talcum powder is 1250-mesh flaky talcum powder provided by Shenzhen Jinhao Haohui mining industry development Limited, the zinc phosphate is modified zinc phosphate provided by Guangxi New Crystal science and technology Limited, the titanium dioxide is rutile titanium dioxide R298 provided by Panzhi group Chongqing titanium industry Limited, and the barium sulfate is 3000-mesh superfine barium sulfate provided by Zhongshan Yongfeng chemical industry Limited.
The talcum powder has better performance in the aspect of improving the salt mist resistance of the coating, because the flaky structure can effectively prevent the salt mist from permeating into the steel plate, thereby delaying the corrosion time. Phosphate ions in the zinc phosphate can react with the iron anode to form a compact protective film mainly made of water-insoluble iron phosphate, so that the corrosion medium is effectively prevented from permeating, and the zinc phosphate has excellent corrosion resistance; meanwhile, zinc phosphate can also react with a plurality of metal ions in a corrosive medium to form a complex which is difficult to dissolve in water. The titanium dioxide is insoluble in water, inorganic acid and the like, can enhance the mechanical strength of a coating film, prevents cracks, ultraviolet rays and moisture from penetrating, and has a certain anticorrosion function. Barium sulfate is difficult to dissolve in water, acid and alkali, and can improve the covering power and compactness of a coating film, so that the coating film also has certain anti-corrosion performance.
The composite filler prepared by mixing the fillers (pigments) according to a certain proportion reflects good synergistic effect among the four materials, can fully exert the advantages of various fillers or pigments, and further shows more excellent water resistance, acid resistance, alkali resistance and corrosion resistance.
In the present invention, the dispersant in the A component is a high molecular weight polymeric dispersant, such as Additol VXW 6208/60, a highly new high molecular weight dispersant in the United states.
In the invention, the defoamer in the component A is TEGO FOAMEX 810.
In the invention, the anti-settling agent 1 in the component A is attapulgite, the anti-settling agent 2 is bentonite, and the anti-settling agent 3 is fumed silica. Further, the anti-settling agent 1 is attapulgite provided by Yongfeng chemical industry Co., ltd, the anti-settling agent 2 is Bentone EW NA bentonite provided by ELEMENTIS, and the anti-settling agent 3 is fumed silica M-5 provided by Cambot.
The single anti-settling agent (attapulgite, bentonite and fumed silica) can improve the anti-settling property and the anti-sagging property of the two-component water-based epoxy zinc-rich coating to a certain extent, but the effect is not obvious. However, in the case of the 3 thixotropic agents of attapulgite, bentonite and fumed silica, the weight percentages (1.0 to 1.4) are as follows: (1.2-1.6): 1, the anti-settling problem and the anti-sagging problem in the waterborne epoxy zinc-rich primer can be effectively solved. The main reasons are as follows: the layer chain structure of the attapulgite, the layered structure of the bentonite and the network structure (three-dimensional) of the fumed silica can play a good role in synergy, thereby playing a good role in preventing sinking and sagging of a coating system.
In the invention, the epoxy emulsion in the component B is 7103 water-based epoxy resin provided by gold group chemical limited company in the Zhuhai city. The water-based acrylic acid epoxy hybrid emulsion has the characteristics of long applicable period, moderate drying speed, excellent salt spray resistance, good wear resistance, strong solvent resistance, high hardness and the like.
In the invention, the graphene aqueous slurry in the component B is KNG-CC501 graphene aqueous slurry provided by Kaina graphene technology GmbH of Xiamen.
The graphene aqueous slurry mainly comprises high-quality graphene and deionized water, is black and thick in appearance, and is a shearing thickening-reducing fluid. The graphene sheet layer exists in a monodisperse mode and a soft aggregate mode in an aqueous medium, and can be rapidly and uniformly dispersed after being diluted. The solid content is (5 +/-0.5)%, and the particle size is 7-10 mu m. The graphene water-based slurry shows good dispersion and interface bonding performance in a water-based paint, and endows the material with outstanding conductivity and corrosion resistance.
As a novel two-dimensional material, the graphene is widely applied to the field of epoxy zinc-rich paint and is mainly based on the following two characteristics: (1) Due to the good conductive performance of the graphene, an electron transmission channel can be formed among the metal zinc powder, a large amount of zinc powder is not required to be closely stacked, the using amount of the zinc powder is reduced, meanwhile, the zinc salt can be bypassed at the later stage to connect the unreacted zinc powder, the utilization rate of the zinc powder is improved, and resources are saved; (2) The unique two-dimensional lamellar structure can be overlapped layer upon layer, staggered arrangement in the coating can increase the distance that corrosive medium immerges the coating, forms the fine and close isolation layer that micromolecule corrosive media such as hydrone, chloridion are difficult to pass through, and the shielding performance of coating promotes by a wide margin.
Furthermore, the weight proportion of the graphene water-based slurry in the formula of the component B is 15.0-25.0%. The weight proportion of the graphene is 0.75-1.25%.
The addition of graphene has great influence on the salt spray resistance of the zinc-rich primer, the addition of graphene in the formula is gradually increased, the conductivity of the coating is continuously increased, a good electronic transmission channel is formed between zinc powder through the overlapping between graphene, the utilization rate of the zinc powder is effectively improved, and the cathode protection effect of the zinc powder is better exerted. When the addition of graphene is continuously increased, the conductivity of the coating is continuously increased, and a good galvanic cell effect is formed between the base material and a corrosive medium, so that the base material is quickly corroded, and the control of the addition of graphene is the key to influence the salt spray resistance.
According to the research of the invention, when the weight proportion of the graphene water-based slurry in the formula of the component B is 15.0-25.0%, namely the weight proportion of the graphene is 0.75-1.25%, the salt spray resistance of the coating of the product is the best.
In the present invention, the anti-flash rust agent in the component B is an anti-flash rust agent FA to 179 provided by hammes (humble).
In the invention, the thickener in the component B is a polyurethane thickener SN612 provided by Guangzhou chemical company Limited.
The preparation method of the long-acting anticorrosion graphene modified waterborne epoxy zinc-rich primer comprises the following specific steps:
1) Preparing a component A: sequentially adding a modified aliphatic amine waterborne epoxy curing agent, a waterborne polyamidoamine epoxy curing agent, a film-forming assistant 1, a film-forming assistant 2, a 800-mesh spherical zinc powder, a 1000-mesh flaky zinc powder, a composite filler, a dispersing agent, a defoaming agent, an anti-settling agent 1, an anti-settling agent 2, an anti-settling agent 3 and other components into a dispersion cylinder according to the formula amount, and dispersing at the rotating speed of 1200-1500 r/min until the fineness of a finished product is less than or equal to 50 um and the viscosity is 100-150 s;
2) Preparing a component B: adding epoxy emulsion, graphene water-based slurry, an anti-flash rust agent, a thickening agent and water into a dispersion cylinder according to the formula amount, uniformly dispersing at the rotating speed of 800-1000 r/min, filtering and packaging;
3) And (3) uniformly mixing the component A and a curing agent according to the weight ratio of 3.
Compared with the prior art, the invention has the beneficial effects that:
1) The content of Volatile Organic Compounds (VOC) of the product is effectively controlled within 50g/l, which is far lower than the chemical industry standard HG/T5176-2017 waterborne anticorrosive coating for steel structures in the PRC chemical industry, and the product is a real healthy and environment-friendly waterborne coating product;
2) The product of the invention has fast drying speed, and the surface drying time and the actual drying time are far less than those of the water-based zinc-rich primer in the chemical industry standard of the people's republic of China "HG/T5176-2017 Water-based anticorrosive paint for Steel Structure", thereby realizing the characteristic of fast drying of the product;
3) The product has good freeze-thaw resistance stability and storage stability, excellent anti-sagging performance, good anti-settling effect, easy construction and convenient operation;
4) The paint film of the invention has strong adhesion to the substrate, good impact resistance and high hardness;
5) The product of the invention has excellent water resistance, acid resistance, alkali resistance and salt spray resistance, and is especially suitable for coastal areas with high salinity and harsh corrosive environment.
Detailed Description
The embodiment provides a long-acting anticorrosion graphene modified waterborne epoxy zinc-rich primer, which consists of a component A and a component B in percentage by weight as follows:
component A
Wherein the sum of the weight percentages of the A components is one hundred percent.
B component
Wherein the sum of the weight percentages of the B components is one hundred percent.
In the component A, a film-forming assistant 1 is ethylene glycol butyl ether, and a film-forming assistant 2 is dipropylene glycol butyl ether; the composite filler is a mixture of talcum powder, zinc phosphate, titanium dioxide and barium sulfate; the dispersant is a high molecular weight dispersant Additol VXW 6208/60 which is brand new in the United states; the antifoaming agent is Foamex 810 antifoaming agent provided by Digao (China) Co., ltd; the dust-proof agent 1 is attapulgite provided by Yongfeng chemical company Limited in Zhongshan City, the dust-proof agent 2 is Bentonie EW NA bentonite provided by ELEMENTIS, and the dust-proof agent 3 is fumed silica M-5 provided by Campott.
In the component B, the epoxy emulsion is 7103 aqueous epoxy resin provided by gold group chemicals, inc. in Zhuhai city, and the graphene aqueous slurry is KNG-CC501 graphene aqueous slurry provided by Kaina graphene technology, inc. in Xiamen; the flash rust prevention agent is FA-179 provided by Haimines (modesty); the thickener is a polyurethane thickener SN612 provided by Guangzhou chemical company Limited.
The preparation method of the long-acting anticorrosion graphene modified waterborne epoxy zinc-rich primer provided by the embodiment comprises the following specific steps:
(1) Preparing a component A: adding modified aliphatic amine waterborne epoxy curing agent, waterborne polyamide-based amine epoxy curing agent, film-forming assistant 1, film-forming assistant 2, 800-mesh spherical zinc powder, 1000-mesh flaky zinc powder, composite filler, dispersant, defoamer, anti-settling agent 1, anti-settling agent 2, anti-settling agent 3 and other components into a dispersion cylinder in sequence according to the formula amount, dispersing at high speed for 30-50 min, wherein the high-speed dispersion speed is 1200-1500 r/min, and the fineness of the finished product is less than or equal to 50 um by sampling detection and the viscosity is 100-150 s.
2) Preparing a component B: adding the epoxy emulsion, the graphene water-based slurry, the anti-flash rust agent, the thickening agent and water into a dispersion cylinder according to the formula amount, dispersing at medium speed for 20-30 min, filtering and packaging.
3) And (3) uniformly mixing the component A and a curing agent according to the weight ratio of 3.
The present invention will be further described with reference to the following examples, but is not limited thereto.
In the specific embodiment, embodiments 1 to 5 are provided to prepare the long-acting anticorrosion graphene modified waterborne epoxy zinc-rich primer disclosed by the invention, wherein the formula of the curing agent A and the curing agent A are shown in table 1, and the formula comprises the following raw materials in percentage by mass (%):
table 1 formula (unit:%) of long-acting anticorrosion graphene-modified waterborne epoxy zinc-rich primer
According to the raw material formula in the above examples 1 to 5, the long-acting anticorrosion graphene modified waterborne epoxy zinc-rich primer in the examples 1 to 5 is prepared according to the preparation method of the long-acting anticorrosion graphene modified waterborne epoxy zinc-rich primer, and the long-acting anticorrosion graphene modified waterborne epoxy zinc-rich primer is coated on the test piece corresponding to the example 1 to 5 and is subjected to performance test.
Performance testing
The products of the long-acting anticorrosion graphene modified waterborne epoxy zinc-rich primer prepared in the embodiments 1-5 of the invention and similar products sold in the market are subjected to spraying construction and performance detection.
Carrying out main body performance test according to the standards of ' HG/T5176-2017 ' waterborne anticorrosive coating for steel structure ' and ' waterborne coating for technical requirement of HJ 2537-2014 environmental mark products '; other basic performance tests were carried out according to the method specified in HG/T3668-2009.
Determination of acid resistance: selecting a common low-carbon steel bar according to GB/T1763-79 'determination method for chemical reagent resistance of paint film', thoroughly polishing with gauze, washing with No. 200 paint solvent oil, and wiping with silk cloth; the sample with viscosity of 20. + -.2 seconds was poured into a measuring cylinder (to 40 ml). Standing until no air bubble is in the sample, vertically immersing the perforated end of the steel bar into the sample within 3 seconds by an immersion method, taking out, and hanging on a rack. The steel bar is placed for 24 hours, inverted by 180 degrees, taken out and dried under the conditions of constant temperature and constant humidity for 7 days. 5% H of a paint film sample panel having an area immersion temperature of two thirds of 25. + -. 1 ℃ 2 SO 4 Soaking in the solution, inspecting the soaked test bars once every 24h, washing the test bars with tap water every time, sucking water drops with filter paper, observing whether the paint film has the phenomena of light loss, color change, small bubbles, spots, falling off and the like, and recording the time if the phenomena occur, wherein the results of the two test bars are consistent.
Determination of alkali resistance: selecting a common low steel bar according to GB/T1763-79 'determination method for chemical reagent resistance of paint film', thoroughly polishing with gauze, washing with No. 200 paint solvent oil, and wiping with silk cloth; the sample with viscosity of 20. + -.2 seconds was poured into a measuring cylinder (to 40 ml). Standing until no air bubble is in the sample, vertically immersing the perforated end of the steel bar into the sample within 3 seconds by an immersion method, taking out, and hanging on a rack. The steel bar is placed for 24 hours, inverted by 180 degrees, taken out and dried under the conditions of constant temperature and constant humidity for 7 days. Soaking two thirds of the area of a paint film sample plate in 5 percent aOH solution at the temperature of 25 +/-1 ℃, inspecting the soaked test bar once every 24 hours, washing the test bar with tap water for each inspection, sucking water drops by using filter paper, observing whether the paint film has the phenomena of light loss, color change, small bubbles, spots, falling off and the like, and recording the time by taking the consistent results of the two test bars as the standard if the phenomena occur.
The results of examining the main performance indexes of the products prepared in examples 1 to 5 and the similar products on the market are shown in table 2.
TABLE 2 test results
According to the test results in table 2, the content of Volatile Organic Compounds (VOC) in the long-acting anticorrosion graphene-modified waterborne epoxy zinc-rich primer prepared in the embodiments 1 to 5 is effectively controlled within 50g/l, which is far lower than the chemical industry standard "HG/T5176-2017" waterborne anticorrosion paint for steel structures "of the people's republic of China, and is a truly healthy and environmentally-friendly waterborne paint product; the product has high drying speed, the surface drying time is less than or equal to 0.5h, the actual drying time is less than or equal to 8.2h, the surface drying time and the actual drying time are far less than the surface drying time and the actual drying time of the water-based zinc-rich primer in the chemical industry standard 'HG/T5176-2017 waterborne anticorrosive paint for steel structures', and the characteristic of quick drying of the product is realized; the product has good freeze-thaw resistance stability and storage stability, excellent anti-sagging performance, good anti-settling effect, easy construction and convenient operation; the paint film of the product has strong adhesion to the substrate, good impact resistance and high hardness.
The product has excellent water resistance, acid resistance, alkali resistance and salt spray resistance, the water resistance of the product is outstanding, the water resistance time is far longer than that of similar products in the industry standard and industry (168 h), and the water resistance reaches more than 2760 h. The product has excellent acid and alkali resistance, 5% at a temperature of 25 + -1 ℃ 2 SO 4 Soaking in 5% aOH solution at 25 + -1 deg.C for over 504h, or soaking in 5% aOH solution at 25 + -1 deg.C for over 600h, and the paint film has no phenomena such as light loss, discoloration, bubbles, spots, and falling off. The salt spray resistance of the product is excellent, the salt spray resistance time is far longer than that of similar products in the industry standard and industry (600 h), and the salt spray resistance time reaches more than 2424h, and the product does not foam or rust.
Claims (10)
1. The long-acting anticorrosion graphene modified waterborne epoxy zinc-rich primer is characterized by consisting of a component A and a component B in percentage by weight as follows:
component A
Wherein the sum of the weight percentages of the A components is one hundred percent;
b component
Wherein the sum of the weight percentages of the B components is one hundred percent.
2. The long-acting anticorrosion type graphene modified waterborne epoxy zinc-rich primer as claimed in claim 1, which is characterized in that: the film-forming aid 1 in the component A is ethylene glycol butyl ether, and the film-forming aid 2 is dipropylene glycol butyl ether; the weight ratio of the film-forming additive 1 to the film-forming additive 2 is (1.2-1.8): 1.
3. The long-acting anticorrosion graphene-modified waterborne epoxy zinc-rich primer as claimed in claim 1, wherein: the weight ratio of the spherical zinc powder of 800 meshes to the flaky zinc powder of 1000 meshes in the component A is (0.4-0.8) to 1.
4. The long-acting anticorrosion graphene-modified waterborne epoxy zinc-rich primer as claimed in claim 1, wherein: the composite filler in the component A is formed by mixing 1.5-1.8 wt% of talcum powder, 1.5-1.8 wt% of zinc phosphate, 0.8-1.2 wt% of titanium dioxide and 1 wt% of barium sulfate.
5. The long-acting anticorrosion graphene-modified waterborne epoxy zinc-rich primer as claimed in claim 1, wherein: the dispersant in the component A is selected from a high molecular weight dispersant Additol VXW 6208/60 which is brand new in the United states; the defoamer is TEGO FOAMEX 810.
6. The long-acting anticorrosion graphene-modified waterborne epoxy zinc-rich primer as claimed in claim 1, wherein: in the component A, an anti-settling agent 1 is attapulgite, an anti-settling agent 2 is bentonite, and an anti-settling agent 3 is fumed silica.
7. The long-acting anticorrosion graphene-modified waterborne epoxy zinc-rich primer as claimed in claim 1, wherein: the attapulgite, the bentonite and the fumed silica are mixed according to the weight ratio of (1.0-1.4): (1.2-1.6): 1, compounding.
8. The long-acting anticorrosion graphene-modified waterborne epoxy zinc-rich primer as claimed in claim 7, wherein: the attapulgite is provided by Yongfeng chemical industry Co., ltd in Zhongshan City; the bentonite is Bentone EW NA bentonite provided by ELEMENTIS; the fumed silica is fumed silica M-5 provided by Kabot.
9. The long-acting anticorrosion graphene-modified waterborne epoxy zinc-rich primer as claimed in claim 1, wherein: the epoxy emulsion in the component B is 7103 water-based epoxy resin provided by gold group chemicals, inc. of Zhuhai city; the graphene water-based slurry is KNG-CC501 graphene water-based slurry provided by Kaina graphene technology Limited of Xiamen; the solid content of graphene in the graphene aqueous slurry is (5 +/-0.5)%; the flash rust inhibitor is FA-179 provided by Hamming and thickener is SN612 provided by Guangzhou Guanzhi chemical Co., ltd.
10. The preparation method of the long-acting anticorrosion graphene-modified water-based epoxy zinc-rich primer as claimed in any one of claims 1 to 9, characterized by comprising the following steps:
1) Preparing a component A: sequentially adding a modified aliphatic amine waterborne epoxy curing agent, a waterborne polyamidoamine epoxy curing agent, a film-forming assistant 1, a film-forming assistant 2, 800-mesh spherical zinc powder, 1000-mesh flaky zinc powder, a composite filler, a dispersing agent, a defoaming agent, an anti-settling agent 1, an anti-settling agent 2, an anti-settling agent 3 and other components into a dispersion cylinder according to the formula amount, and dispersing at the rotating speed of 1200-1500 r/min until the fineness of a finished product is less than or equal to 50 um and the viscosity is 100-150 s;
2) Preparing a component B: adding epoxy emulsion, graphene water-based slurry, an anti-flash rust agent, a thickening agent and water into a dispersion cylinder according to the formula amount, uniformly dispersing at the rotating speed of 800-1000 r/min, filtering and packaging;
3) And (3) uniformly mixing the component A and a curing agent according to the weight ratio of 3.
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| CN202211076378.0A CN115466554A (en) | 2022-09-05 | 2022-09-05 | Long-acting anticorrosion graphene modified waterborne epoxy zinc-rich primer and preparation method thereof |
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| CN202211076378.0A CN115466554A (en) | 2022-09-05 | 2022-09-05 | Long-acting anticorrosion graphene modified waterborne epoxy zinc-rich primer and preparation method thereof |
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| CN107987680A (en) * | 2017-12-20 | 2018-05-04 | 海洋化工研究院有限公司 | Water-base epoxy graphene anticorrosive paint |
| CN108690456A (en) * | 2018-03-15 | 2018-10-23 | 河北晨阳工贸集团有限公司 | A kind of water-based epoxy zinc-rich primer and preparation method thereof |
| CN111234654A (en) * | 2020-03-24 | 2020-06-05 | 沈阳派尔化学有限公司 | Novel water-based epoxy zinc-rich primer and preparation method thereof |
| CN111961362A (en) * | 2020-08-27 | 2020-11-20 | 北京石墨烯研究院 | Water-based zinc oxide alkene primer and preparation method thereof |
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| CN107987680A (en) * | 2017-12-20 | 2018-05-04 | 海洋化工研究院有限公司 | Water-base epoxy graphene anticorrosive paint |
| CN108690456A (en) * | 2018-03-15 | 2018-10-23 | 河北晨阳工贸集团有限公司 | A kind of water-based epoxy zinc-rich primer and preparation method thereof |
| CN111234654A (en) * | 2020-03-24 | 2020-06-05 | 沈阳派尔化学有限公司 | Novel water-based epoxy zinc-rich primer and preparation method thereof |
| CN111961362A (en) * | 2020-08-27 | 2020-11-20 | 北京石墨烯研究院 | Water-based zinc oxide alkene primer and preparation method thereof |
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