CN108531033B - Dispersion type water-based epoxy zinc alkene rust-proof heavy-duty anti-corrosive primer - Google Patents
Dispersion type water-based epoxy zinc alkene rust-proof heavy-duty anti-corrosive primer Download PDFInfo
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
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- C08K2003/0893—Zinc
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- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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Abstract
The invention discloses a dispersion type water-based epoxy zinc alkene rust-proof heavy-duty anti-corrosive primer, which is a three-component water-based heavy-duty anti-corrosive primer, wherein a component A comprises a water-based epoxy dispersion, a dispersing agent, a defoaming agent, zinc oxide, a rust conversion agent, water-dispersed graphene, a special dispersing agent for the graphene, a flash rust prevention aid, a water-based rheological aid and water; the component B is zinc powder; the component C consists of a waterborne epoxy curing agent and water. The invention does not volatilize any organic solvent, takes water as a dispersion medium, can convert rust on the surface of steel and generate stable substances, can exert the anticorrosion capability of graphene, zinc oxide and epoxy resin, and can provide continuous cathodic protection capability for the surface of a base material.
Description
Technical Field
The invention relates to the field of water-based epoxy anticorrosive paint, in particular to a dispersion-type water-based epoxy zinc alkene (three components) rust-carrying antirust heavy-duty anticorrosive primer and a preparation method and application thereof.
Background
1. The surface of steel needs to be treated by adopting methods of sand blasting, manual or electric tools and the like before the traditional anticorrosive paint is constructed again, but some large-scale steel equipment is difficult to remove rust completely or even cannot remove rust, and the protection function of a paint film is influenced.
2. The zinc-rich heavy-duty anticorrosive primer is one of the most important and most commonly used heavy-duty anticorrosive coating varieties in the aspects of steel structures of ships, ocean facilities, bridges, large-scale equipment and various large-scale buildings, the anticorrosion mechanism of the primer is based on the cathodic protection effect of metal zinc powder on steel, the content of the zinc powder is closely related to the anticorrosion effect of the steel, but the high-content zinc powder (60% -85%) also brings a plurality of disadvantages for the zinc-rich primer: 1) the use of a large amount of zinc powder can cause the influence on the human health and easily cause 'zinc fever' due to zinc oxide smoke dust and zinc vapor generated during the hot processing such as welding, cutting and the like; 2) the zinc powder content is high, so that the compactness of a paint film is poor, the strength is low, and the matching property with finish paint is poor; 3) the density of the epoxy zinc-rich primer is about 3.0 g/cm3, which is 2 times of that of the common epoxy antirust primer, and the epoxy zinc-rich primer does not conform to the weight reduction and consumption reduction concept of the novel marine coating.
3. Although the water-based inorganic zinc-rich product is environment-friendly and has good anti-corrosion effect, the water-based inorganic zinc-rich product has high brittleness, large resource consumption, harsh construction conditions and low bonding strength, and is only suitable for the surface of a metal material. The epoxy resin has good physical and chemical properties, and has excellent bonding strength for the surfaces of metal and nonmetal materials.
4. Although the traditional epoxy zinc-rich primer has a good anti-corrosion effect, the traditional epoxy zinc-rich primer contains a large amount of organic solvent and is not environment-friendly. Meanwhile, the method has many disadvantages caused by high zinc content.
5. At present, Chinese patent No. CN 103897556A discloses a zinc-olefin heavy-duty anticorrosive paint and a preparation method thereof, the paint belongs to a solvent-type heavy-duty anticorrosive paint, although the defect of high zinc powder content is overcome, the paint contains a large amount of volatile solvent, and is not beneficial to environmental protection.
6. At present, Chinese patent No. CN106085133a discloses a novel water-based epoxy graphene anticorrosive paint, which is a two-component anticorrosive paint, wherein the component A is composed of a water-based epoxy emulsion without any cosolvent and a defoaming agent, and the component B is composed of a water-based epoxy curing agent with a self-emulsifying function, graphene, zinc phosphate, titanium dioxide, a leveling agent and water. The invention has the advantage that the corrosion resistance of the paint is not higher than that of the solvent-type zinc-alkene heavy-duty anticorrosive paint.
7. Based on the above, the graphene and the rust conversion agent are added into the pollution-free and VOC-free dispersion type aqueous zinc oxide alkene (three-component) heavy-duty anticorrosive paint, and through reasonable formula design, the graphene modified dispersion type aqueous zinc oxide alkene (three-component) anticorrosive paint, namely the dispersion type aqueous zinc oxide alkene (three-component) rusty antirust heavy-duty anticorrosive primer, is developed, the paint has the characteristic of zero pollution of an aqueous inorganic zinc-rich product, and meanwhile, the zinc content only needs 30% to achieve the corrosion prevention effect of 85% of the zinc content of the aqueous inorganic zinc-rich primer required by TB/T1527-2011, so that the cost is lower, and the problem of harsh construction conditions is solved. The anti-corrosion performance of the solvent type zinc oxide alkene heavy-duty anticorrosive coating can be compared with that of the solvent type zinc oxide alkene heavy-duty anticorrosive coating, and meanwhile, the coating is more environment-friendly than the solvent type zinc oxide alkene heavy-duty anticorrosive coating. Meanwhile, the rust converting agent can convert the rust on the surface of the steel and generate stable substances, and can be used for protecting the surface of the steel with thicker rust.
The invention content is as follows:
under the condition of screening various raw materials such as aqueous epoxy dispersoid, aqueous curing agent, graphene, zinc oxide, rust conversion agent, zinc powder and the like, the dispersion type aqueous epoxy zinc alkene (three components) rust-carrying antirust heavy-duty anticorrosion primer which has no volatilization of any organic solvent, takes water as a dispersion medium, can convert iron rust on the surface of steel and generate stable substances, can exert the anticorrosion capability of the graphene, the zinc oxide and the epoxy resin and can provide continuous cathodic protection capability for the surface of a base material is obtained.
The technical scheme provided by the invention is as follows: a dispersion type water-based epoxy zinc alkene rust-proof heavy-duty anti-corrosive primer is characterized in that: the heavy anti-corrosion primer is a three-component water-based heavy anti-corrosion primer, wherein the component A consists of a water-based epoxy dispersion, a dispersing agent, a defoaming agent, a leveling agent, zinc oxide, a rust conversion agent, water-dispersible graphene, a special dispersing agent for graphene, an anti-flash rust additive, a water-based rheological additive and water; the component B is zinc powder; the component C consists of a waterborne epoxy curing agent and water.
The mass fraction of each component in the component A is as follows: 40-70% of aqueous epoxy dispersion, 0.1-5% of water dispersible graphene, 0.1-0.5% of special dispersant for graphene, 5-10% of zinc oxide, 0.1-0.5% of dispersant, 0.1-0.5% of defoaming agent, 0.1-0.5% of flatting agent, 0.1-1% of aqueous rheological additive, 3-10% of rust conversion agent, 0.5-2% of flash rust prevention additive and 20-40% of water; the mass fraction of each component in the component C is as follows: 40-60% of water-based epoxy curing agent and 40-60% of water.
The mass ratio of the A, B, C components is 3:2: 1-4.
The dispersion particle diameter of the aqueous epoxy dispersion in water is 10-100 nm.
The water dispersible graphene is prepared by a physical expansion method.
The water-dispersible graphene is P-ML20, and the rust conversion agent is a rust conversion agent 2611.
The waterborne epoxy curing agent in the component C is a zero-VOC modified fatty amine waterborne curing agent, and can be selected from a waterborne epoxy curing agent STW-703B of Shanghai Xinhua resin factory with a solid content of 80%; CU600 water-based epoxy hardener of shanghai fulang chemical technology development ltd; WEP-05 waterborne epoxy curing agent of Shanghai Junjiang new materials Co.
The invention also provides a preparation method of the dispersion type water-based zinc oxide alkene rust-carrying antirust heavy-duty anti-corrosive primer, which comprises the steps of premixing water, a dispersing agent and a half of defoaming agent uniformly at the condition that the rotating speed of a stirrer is 500 r/min and the temperature is 15-45 ℃, adding the water-based epoxy dispersion, continuously stirring until the mixture is uniform, then adding the water-based rheological additive and zinc oxide, uniformly mixing and stirring at the rotating speed of 2500 r/min, grinding until the fineness is less than 35 micrometers, then adding the dispersing agent special for graphene, the water-dispersed graphene and the rest of defoaming agent, mixing and stirring for 30 minutes at the rotating speed of 1800 r/min, finally adding the rust-converting agent and the water-based rheological additive, and.
The invention also provides application of the dispersion type water-based epoxy zinc alkene rust-carrying anti-rust heavy-duty anti-corrosion primer in the heavy-duty anti-corrosion field of a steel structure base material or a base material surface heavy-duty anti-corrosion primer which is difficult to remove or cannot remove rust.
When the adhesive is used, A, B, C three components are mixed and stirred uniformly according to the mass ratio of 3:2:1-4, then tap water is added to adjust the viscosity to the required viscosity, and then the adhesive is sprayed on a base material.
The invention is different from the traditional water-based epoxy anticorrosive paint
1. The non-VOC aqueous epoxy dispersion has the particle size of 10-100nm, can be ground without demulsification and is a zero-VOC aqueous epoxy dispersion. And no cosolvent is added in the whole coating preparation process, so that the coating is completely environment-friendly. The paint is completely comparable to the water-based inorganic zinc-rich primer in the aspect of environmental protection.
2. The dispersing agent is prepared from functional group-containing water dispersible graphene by a physical expansion method instead of a chemical corrosion method, and the special dispersing agent for graphene enables graphene to be fully and effectively fused into an aqueous epoxy dispersion body without agglomeration, enables graphene to be uniformly dispersed and wrapped in an emulsion matrix, solves the problems of difficulty in dispersion and poor compatibility of graphene in an aqueous system, and obtains the uniformly dispersed graphene-containing aqueous epoxy dispersion body.
3. The graphene obtained by a physical expansion method has excellent conductivity, a proper amount of graphene can be added, the cathode protection effect can be effectively exerted not only in the initial stage of corrosion, part of zinc powder in a layer forms zinc salt due to oxidation, the conductivity is reduced, meanwhile, the adjacent graphene can be contacted with the upper layer of zinc powder to play the same cathode protection effect, and an effective micro-conductive circulation passage can be formed with a small amount of zinc powder under the condition that the zinc content is greatly reduced, so that the effect of sacrificing an anode protection substrate is achieved. The protection period is more durable.
4. The aqueous epoxy dispersion has good physical and chemical properties, and has excellent bonding strength on the surfaces of metal and nonmetal materials.
5. The traditional solvent-type zinc-rich primer and the water-based zinc-rich primer have large zinc content and large pigment volume ratio, a coating can generate a large amount of pores, a paint film is not compact, a seal primer needs to be added during construction, and labor is consumed. The coating of the product can be directly coated with matched finish without adding a seal primer
6. And then zinc oxide and rust conversion agent are matched to convert the rust on the surface of the steel and generate stable substances, thereby playing the role of protecting the surface of the steel and iron. And the paint is matched with zinc powder for corrosion prevention and replaces part of the zinc powder, so that the corrosion resistance of a paint film is ensured, energy is saved, and the environment is protected.
7. The invention relates to a dispersion type aqueous zinc oxide alkene (three components) rust-carrying antirust heavy-duty anti-corrosive primer.
The primer has the characteristic of zero pollution of inorganic zinc-rich products, the zinc content only needs 30 percent to achieve the anti-corrosion effect of 85 percent of the zinc content of the waterborne inorganic zinc-rich primer required by TB/T1527-. The anti-corrosion performance of the solvent type zinc oxide alkene heavy-duty anticorrosive coating can be compared with that of the solvent type zinc oxide alkene heavy-duty anticorrosive coating, and meanwhile, the coating is more environment-friendly than the solvent type zinc oxide alkene heavy-duty anticorrosive coating. Compared with the construction of CN106085133A (a novel water-based anticorrosive paint) and CN105086760A (a preparation method of a water-based epoxy graphene anticorrosive primer), the construction method is more convenient, and the construction method can be carried out in various ways. Stronger corrosion resistance, and more application value and market potential.
8. The key performance indexes of the invention and the performance indexes of the traditional zinc-rich paint have the following results:
| the invention relates to heavy anti-corrosion primer | Solvent type epoxy zinc-rich primer | Water-based inorganic zinc-rich primer | Water-based epoxy graphene anticorrosive paint | Solvent type epoxy zinc alkene anti-corrosive paint (on the market) | |
| Zinc content | 30% | ≥80% | ≥80% | \ | 46% |
| Ratio of the facial components | 2.0 | ＞6 | ＞6 | \ | 2.2 |
| Adhesion (pull open method), MPa | 9 | 9 | 4 | 9 | 9 |
| Impact strength, cm | ＞50 | ＞50 | ＜50 | ＞50 | ＞50 |
| Construction for preventing rust | Can be used for | Whether or not | Whether or not | Whether or not | Whether or not |
| VOC content | Is free of | Containing VOC | Is free of | Is free of | Containing VOC |
| Resistance to salt fog | 3000h | 1200h | 1500h | 600h | 2000h |
The product performance of the invention can reach the anti-corrosion effect of 85 percent of zinc content of the water-based inorganic zinc-rich primer required by TB/T1527 plus 2011, the cost is lower, the problem of harsh construction conditions is solved, the surface treatment can be avoided, the rust on the surface of the steel is converted and a stable substance is generated, and the invention can be used for protecting the surface of the steel with slightly thick rust. The anti-corrosion performance of the solvent type zinc oxide alkene heavy-duty anticorrosive coating can be compared with that of the solvent type zinc oxide alkene heavy-duty anticorrosive coating, and meanwhile, the coating is more environment-friendly than the solvent type zinc oxide alkene heavy-duty anticorrosive coating.
The rust conversion agent is added, so that the rust on the surface of the steel can be converted and a stable substance can be generated, and the rust conversion agent can be used for protecting the surface of the steel with thicker rust. Meanwhile, the paint film is more compact due to the multi-layer sheet structure of the graphene, the capability of the coating for isolating water and air from permeating is further improved, and the graphene has excellent corrosion resistance and further improves the corrosion resistance of the coating. The proper amount of graphene is added, an effective micro-conductive circulation path can be formed with a small amount of zinc powder under the condition that the content of the zinc powder is greatly reduced, smoothness of electron-losing channels of part of isolated zinc powder particles is guaranteed, the effect of sacrificing an anode protection substrate is achieved, and the protection life is longer.
The specific implementation mode is as follows:
a dispersion type water-based zinc oxide alkene (three-component) rust-proof heavy-duty anti-corrosive primer comprises three components of A/B/C, and respectively comprises the following components:
the component A comprises: aqueous epoxy dispersion (zero VOC, STW-703A): 40-70 percent
Graphene (P-ML 20): 0.1 to 5 percent
Zinc oxide (national standard): 5-10 percent
Rust conversion agent (2611): 3 to 10 percent of
Dispersant (W-18D modest): 0.1 to 0.5 percent
The special dispersant for graphene (Meiqilin new material MQ-512): 0.1 to 0.5 percent
Antifoam (W-074D modest): 0.1 to 0.5 percent
Flash rust prevention aid (340A long sea chemical): 0.5 to 2 percent
Aqueous rheology adjuvant (WT-201D modest): 0.1 to 1 percent
Water: 20 to 40 percent of
And B component: zinc powder: 100 percent
And C, component C: waterborne epoxy curing agent (703B solids content 80%): 40-60 percent
Tap water: 40-60 percent
When in use, the A, B, C components are prepared according to the mass ratio of 3:2:1-4, and are uniformly stirred and diluted by adding water according to the construction viscosity. The dispersion type aqueous epoxy zinc alkene (three components) rust-carrying antirust heavy-duty anticorrosive primer can be constructed in various ways such as spraying, brushing, rolling and the like through experiments. Compared with other disclosed water-based anticorrosive paint patents, the invention is more convenient to construct compared with the construction with the publication number of CN106085133A (a novel water-based anticorrosive paint), and can be constructed in various ways. The corrosion resistance is stronger.
The preparation process comprises the following steps:
firstly premixing water, W-18 and part of W-074 (the rotating speed of a stirrer is 500 r/min) (the temperature is not more than 45 ℃), adding STW-703A, stirring at a low speed until the mixture is uniform, then adding half of the aqueous rheological additive and zinc oxide, mixing, stirring uniformly, grinding until the fineness is less than 35 microns (the rotating speed of the stirrer is 2500 r/min) (the temperature is not more than 45 ℃), finally adding the special dispersing agent for graphene (MQ-512), the graphene P-ML20 and the rest of W-074, mixing, stirring (the rotating speed of stirring is 1800 r/min after the graphene is added, stirring for 30 minutes (the circulating water is started, the temperature is not more than 45 ℃), then adding the rust-converting agent, and continuously stirring uniformly to obtain the component A.
The technological parameters are as follows:
| name of art | Process parameters and procedures |
| Premixing | The rotating speed of the stirrer is 500 revolutions per minute (the temperature does not exceed 45℃) |
| Grinding | The rotating speed of the stirrer is 2500 rpm (circulating water is started, the temperature does not exceed 45℃) |
| Stirring the mixture | Adding graphene, stirring at 1800 rpm for 30 minutes (circulating water is started, temperature is not more than 45 ℃) |
| Mixing | Adding rust conversion agent and WT-201, stirring at 600 rpm for 10 min (circulating water is started, temperature is not more than 45 deg.C) |
Description of the drawings: the preparation method has the advantages that the graphene can be directly dispersed in the aqueous epoxy dispersion, and because the graphene is easy to agglomerate, the aqueous epoxy dispersion capable of being ground without demulsification and the graphene oxide containing functional groups (the dispersion type is better in any coating system) are selected from materials, and then the graphene special dispersing agent is matched, so that the graphene can be fully and effectively fused into the aqueous epoxy emulsion without agglomeration by utilizing the multilayer sheet structure of the graphene.
In order to better illustrate the invention, the following examples are given to further illustrate the invention, but the invention is not limited to the following examples.
Example 1:
dispersion type aqueous zinc oxide alkene (three components) rust-carrying antirust heavy-duty anti-corrosive primer:
the component A comprises: aqueous epoxy dispersion STW-703A: 60 parts (dispersion VOC 0, solid content 50%); 0.5 part of water dispersible graphene P-ML20; the special dispersant for graphene (Meiqilin new material MQ-512): 0.5 part; zinc oxide (national standard): 10 parts of (A); aqueous dispersant W-18 (modesty): 0.3 part; aqueous W-074 (D modest): 0.3 part; aqueous rheology adjuvant 201T (modesty): 0.9 part; flash rust prevention aid (340A long sea chemical): 0.5 part; a rust conversion agent (2611); 7 parts; tap water: 20 portions of
The preparation process comprises the following steps:
firstly premixing water, W-18 and part (half) of W-074 (the rotating speed of a stirrer is 500 r/min) (the temperature is not more than 45 ℃), adding STW-703A, stirring at low speed until the mixture is uniform, then adding part (half) of aqueous rheological additive and zinc oxide, mixing, stirring uniformly, grinding until the fineness is less than 35 microns (the rotating speed of the stirrer is 2500 r/min) (the temperature is not more than 45 ℃), finally adding special dispersing agent for graphene (MQ-512), graphene P-ML20 and the rest of W-074, mixing, stirring at the rotating speed of 1800 r/min for 30 minutes (the circulating water is started, the temperature is not more than 45 ℃), then adding rust-converting agent anti-flash rust additive and the rest of aqueous rheological additive, and continuously stirring uniformly to obtain the component A.
And B component: zinc powder
And C, component C: waterborne epoxy curing agent 703B (solid content 80%): 60 parts; water: 40 parts of the components.
When in use, the components are uniformly mixed according to the proportion of A: B: C =3:2:2, water is added according to the construction requirement to adjust the viscosity, and the detection result of the paint after spraying according to the standard thickness requirement of TB/T1527-:
| water-based epoxy zinc alkene anticorrosive paint | Epoxy zinc-rich primer | Water-based inorganic zinc-rich primer | |
| Content of metallic zinc in non-volatile matter (mixture ratio) | 40% | 80% | 85% |
| Non-volatile matter content | ≥70% | ≥80% | ≥75% |
| Water resistance | ≥720h | ≥168h | ≥720h |
| Resistance to neutral salt fog | 3000h | ≥1000h | ≥1000h |
| Flexibility | 1 | 1 | |
| Impact property | 50 | 50 | |
| Adhesion (pull open, MPa) | 9 | 9 | 5 |
| VOC content | Is free of | Is provided with | Is free of |
| Construction adhesion with rust (pull-open method, MPa) | 8 | 4 | 2 |
Example 2:
dispersion type aqueous zinc oxide alkene (three components) rust-carrying antirust heavy-duty anti-corrosive primer:
the component A comprises: aqueous epoxy dispersion STW-703A: 65 parts (dispersion VOC 0, solids content 50%); 3 parts of water dispersible graphene P-ML20; the special dispersant for graphene (Meiqilin new material MQ-512): 0.5 part; zinc oxide (national standard): 5 parts of a mixture; aqueous dispersant W-18 (modesty): 0.3 part; aqueous W-074 (D modest): 0.3 part; aqueous rheology adjuvant 201T (modesty): 0.9 part; flash rust prevention aid (340A long sea chemical): 0.5 part; a rust conversion agent (2611); 7 parts; tap water: 17.5 parts of
The preparation method is the same as that of example 1
And B component: zinc powder
And C, component C: waterborne epoxy curing agent 703B (solid content 80%): 50 parts of a mixture; water: 50 parts of the raw materials.
Example 3:
dispersion type aqueous zinc oxide alkene (three components) rust-carrying antirust heavy-duty anti-corrosive primer:
the component A comprises: aqueous epoxy dispersion STW-703A: 45 parts (dispersion VOC 0, solid content 50%); 5 parts of water dispersible graphene P-ML20; the special dispersant for graphene (Meiqilin new material MQ-512): 0.5 part; zinc oxide (national standard): 10 parts of (A); aqueous dispersant W-18 (modesty): 0.3 part; aqueous W-074 (D modest): 0.3 part; aqueous rheology adjuvant 201T (modesty): 0.9 part; flash rust prevention aid (340A long sea chemical): 0.5 part; a rust conversion agent (2611); 7 parts; tap water: 30.5 parts
The preparation method is the same as that of example 1
And B component: zinc powder
And C, component C: waterborne epoxy curing agent 703B (solid content 80%): 50 parts of a mixture; water: 50 parts of the raw materials.
And (3) index performance test:
| example 1 | Example 2 | Example 3 | |
| Fineness of fineness | 35 micron | 35 micron | 35 micron |
| Adhesion (pull open, MPa) | 9 | 9 | 9 |
| Construction adhesion with rustForce (pulling method, MPa) | 8 | 8 | 8 |
| Flexibility | Level 1 | Level 1 | Level 1 |
| Resistance to salt fog | ＞3000h | ＞2000h | ＞1500h |
As can be seen from the index performance test table, the more the amount of graphene is, the poorer the salt spray resistance of the coating is, and other properties of the coating have no influence. It can be seen that the larger the amount of graphene, the better the salt spray effect of the coating.
The salt spray resistance of a paint film can be adjusted to a certain extent by adjusting the proportion of the epoxy dispersion and the zinc powder.
The above are merely examples of the present invention and are not intended to limit the scope of the present invention.
Claims (6)
1. A dispersion type water-based epoxy zinc alkene rust-proof heavy-duty anti-corrosive primer is characterized in that: the heavy anti-corrosion primer is a three-component aqueous heavy anti-corrosion primer, wherein the component A comprises an aqueous epoxy dispersion, a dispersing agent, a defoaming agent, a leveling agent, zinc oxide, a rust conversion agent, water dispersible graphene, a special dispersing agent for graphene, an anti-flash rust additive, an aqueous rheological additive and water; the component B is zinc powder; the component C consists of a waterborne epoxy curing agent and water;
the mass fraction of each component in the component A is as follows: 40-70% of aqueous epoxy dispersion, 0.1-5% of water dispersible graphene, 0.1-0.5% of special dispersant for graphene, 5-10% of zinc oxide, 0.1-0.5% of dispersant, 0.1-0.5% of defoaming agent, 0-0.5% of flatting agent, 0.1-1% of aqueous rheological additive, 3-10% of rust conversion agent, 0.5-2% of flash rust prevention additive and 20-40% of water; the mass fraction of each component in the component C is as follows: 40-60% of water-based epoxy curing agent and 40-60% of water; the dispersion particle size of the aqueous epoxy dispersion in water is 10-100 nm; the water dispersible graphene is prepared by a physical expansion method; the special dispersant for graphene is a novel Meiqilin material MQ-512; the waterborne epoxy curing agent in the component C is a zero-VOC modified fatty amine waterborne curing agent; the mass ratio of the A to the B to the C is 3:2: 1-4.
2. The heavy duty primer of claim 1, wherein: the aqueous epoxy dispersion is selected from one of STW-703A of Shanghai Xinhua resin factory, MU601 of Shanghai Fulang chemical engineering science and technology development Limited and JCW-3553 of Chengdu Sanshu Bunge New Material science and technology Limited.
3. The heavy duty primer of claim 1, wherein: the water dispersible graphene is P-ML20; the rust conversion agent is a rust conversion agent 2611.
4. The heavy duty primer of claim 1 or 2, wherein: the waterborne epoxy curing agent is selected from one of STW-703B waterborne epoxy curing agents of Shanghai Xinhua resin factory, CU600 waterborne epoxy curing agents of Shanghai Fulang chemical technology development Co., Ltd and WEP-05 waterborne epoxy curing agents of Shanghai Junjiang New materials Co., Ltd.
5. The use method of the dispersion type water-based epoxy zinc alkene rust-carrying antirust heavy-duty anticorrosion primer according to claim 1 is characterized in that when in use, A, B, C three components are mixed and stirred uniformly according to the mass ratio of 3:2:1-4, then tap water is added to adjust the viscosity to the required viscosity, and then the primer is sprayed on a base material.
6. Use according to claim 5, wherein the substrate is a steel-structured substrate or a substrate that is difficult or impossible to remove.
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| CN109294401A (en) * | 2018-10-16 | 2019-02-01 | 北京隆源纳欣科技有限公司 | A kind of watersoluble plumbago alkene zinc-rich paint and preparation method thereof |
| CN109608983A (en) * | 2018-11-30 | 2019-04-12 | 镇江利德尔复合材料有限公司 | A kind of anticorrosive coating and preparation method thereof for underground petroleum storage tank |
| CN112063272B (en) * | 2020-08-13 | 2022-08-26 | 珠海展辰新材料股份有限公司 | Water-based antirust coating and preparation method thereof |
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| CN103497636B (en) * | 2013-09-07 | 2016-09-21 | 中国科学院合肥物质科学研究院 | Water-thinned epoxy zinc-rich coating that conductive nano material with carbon element is modified and preparation method thereof |
| CN105419564A (en) * | 2015-12-24 | 2016-03-23 | 常州纳美生物科技有限公司 | Nano graphene oxide modified double-component aqueous epoxy anti-corrosion coating and preparation method thereof |
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