CN112210271A - Water-based low-surface-treatment anticorrosive paint and preparation method and application thereof - Google Patents
Water-based low-surface-treatment anticorrosive paint and preparation method and application thereof Download PDFInfo
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- CN112210271A CN112210271A CN202010972645.7A CN202010972645A CN112210271A CN 112210271 A CN112210271 A CN 112210271A CN 202010972645 A CN202010972645 A CN 202010972645A CN 112210271 A CN112210271 A CN 112210271A
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- C—CHEMISTRY; METALLURGY
- 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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- C—CHEMISTRY; METALLURGY
- 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
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- C—CHEMISTRY; METALLURGY
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/328—Phosphates of heavy metals
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
The invention discloses a water-based low-surface-treatment anticorrosive paint, and a preparation method and application thereof, wherein the water-based anticorrosive paint comprises a component A and a component B, and the component A comprises the following raw materials: the component B comprises a water-based amine curing agent; the solid content of the waterborne epoxy emulsion is more than or equal to 70 percent, and the viscosity is less than 500 cP; the solid content of the aqueous amine curing agent is greater than or equal to 75%. According to the invention, the waterborne epoxy emulsion with high solid content and low viscosity is selected and compounded with the waterborne amine curing agent with high solid content, so that the waterborne epoxy coating reaches the ultrahigh solid content level required by the ultrahigh solid content epoxy coating, and the thickness of a one-time coating dry film is obviously increased.
Description
Technical Field
The invention belongs to the technical field of coatings, and particularly relates to a water-based low-surface-treatment anticorrosive coating, and a preparation method and application thereof.
Background
The low surface treatment coating has wide application in the field of corrosion prevention, and especially has wider application when the base material is not well treated, contains dirty oil, rust and the like and does not clean the surface of the base material, and the common corrosion prevention coating is difficult to meet the requirements. Most of the existing low-surface treatment coatings are oil coatings, which have great harm to the environment and human bodies, so that an environment-friendly and healthy coating needs to be developed to replace the traditional oil low-surface treatment coating.
The high solid content coating becomes one of the development directions of the environment-friendly coating due to the lower content of VOCs. The high solid content paint is generally oily high solid content paint. The content of VOCs in the oily high-solid paint is lower than 420g/L required by environmental protection, but still contains a certain amount of VOCs. In addition, oily high solids coatings are hazardous chemicals and present significant difficulties in shipping and storage. The water-based paint can effectively solve the defects of transportation and storage of the oil-based high-solid paint. However, the solid content and the one-time film-forming thickness of the water-based paint are difficult to reach the high solid content standard. The water-based epoxy micaceous iron oxide coating provided by CN110218503A has low VOCs, but the solid content is only about 80%, and the dry film thickness of one-time coating is only about 120 μm. According to the definition of the group standard 'definition of epoxy coating with high content of low VOCs, ultrahigh solid content and no solvent', the ultrahigh solid content epoxy coating requires that the solid content (mass fraction of non-volatile matter) is more than or equal to 88%, the content of VOCs is lower, the thickness of one-time film forming is higher, and the requirement of heavy corrosion resistance can be met better.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the first purpose of the invention is to provide a water-based low-surface treatment anticorrosive paint which has ultrahigh solid content and realizes the thick film formation of a coating film.
The water-based low-surface-treatment anticorrosive paint comprises a component A and a component B, wherein the component A comprises the following raw materials: the component B comprises a water-based amine curing agent; the solid content of the waterborne epoxy emulsion is more than or equal to 70 percent, and the viscosity is less than 500 cP; the solid content of the aqueous amine curing agent is greater than or equal to 75%.
The mass ratio of the component A to the component B is (6-11): 1.
the raw materials of the component A also comprise an antirust pigment.
The auxiliary agent comprises a wetting dispersant, an adhesion promoter, a corrosion inhibitor, a rust converting agent, a defoaming agent, an anti-flash rust agent, an anti-sagging agent and a base material wetting agent.
The water-based low-surface-treatment anticorrosive paint comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight:
20-30 parts of water-based epoxy emulsion
5-15 parts of antirust pigment
50-60 parts of pigment and filler
0.1-0.5 part of wetting dispersant
1-3 parts of adhesion promoter
1-3 parts of corrosion inhibitor
1-5 parts of rust converting agent
0.1 to 0.5 portion of defoaming agent
0.5-3 parts of flash rust inhibitor
0.5-1.5 parts of anti-sagging agent
0.1 to 1.0 portion of base material wetting agent
The component B comprises the following raw materials in parts by weight:
10-15 parts of a water-based amine curing agent.
The component A also comprises water, and the water accounts for 0-2 parts by weight.
The anti-rust pigment is selected from one or more of zinc phosphate, organic modified zinc phosphate, aluminum tripolyphosphate, molybdenum zinc phosphate, zinc silicate and organic anti-rust pigments.
The pigment and filler is selected from one or more of titanium dioxide, iron oxide, silicon carbide, barium sulfate or feldspar powder, and is a common commercial product; the iron oxide may be selected from iron oxide based pigments, such as red iron oxide. When powders having a coloring action are mixed with conventional filler powders having no coloring action and only having a filling action, the resulting powders are collectively referred to as pigment fillers. The pigment and filler of the present invention includes a pigment having a coloring action and/or a filler having no coloring action and having only a filling action, in addition to the rust-preventive pigment.
The adhesion promoter is a silane coupling agent containing epoxy groups.
The corrosion inhibitor is an organic compound with the functions of passivating the substrate and modifying the pigment and filler, and is preferably 141, 142DA or 143 of Ascadi.
The rust converting agent is an organic compound having a rust converting function, preferably X1, X2 or X3 of Ascadi.
The anti-settling agent is one or more of organic bentonite, polyurethane and fumed silica.
The base material wetting agent is one or more of organic silicon, fluorine-containing compound and high molecular polymer.
The second purpose of the invention is to provide a preparation method of the water-based anticorrosive paint, which comprises the following steps:
(1) mixing the raw materials of the component A to obtain a component A;
(2) and packaging the water-based amine curing agent to obtain the component B.
Specifically, the raw material mixing method in the step (1) comprises the steps of uniformly stirring and dispersing the water-based epoxy emulsion, the wetting dispersant, the defoaming agent and water; then adding pigment filler and antirust pigment to disperse until the fineness is less than or equal to 60 mu m; then adding an adhesion promoter, a corrosion inhibitor, a rust converting agent, an anti-flash rust agent, a base material wetting agent and an anti-sagging agent into the dispersed powder, and uniformly stirring to obtain the component A.
Wherein the stirring speed of the stirring and dispersing process of the water-based epoxy emulsion, the wetting dispersant, the defoaming agent and the water is 500-600 r/min, and the stirring time is 5-10 min; adding the pigment, the filler and the anti-rust pigment, and then stirring at 1500-2500 r/min for 10-15 min; the stirring speed is 700-800 r/min after the adhesion promoter, the corrosion inhibitor, the rust converting agent, the flash rust inhibitor, the base material wetting agent and the anti-sagging agent are added, and the stirring time is 5-10 min.
The third purpose of the invention is to provide the application of the water-based low-surface-treatment anticorrosive paint in the field of surface corrosion prevention.
The application method of the water-based low-surface-treatment anticorrosive paint comprises the following steps of: 1, adding water to dilute the mixture to the required viscosity (which can be adjusted from 50 KU to 90KU according to different practical conditions), and coating the mixture on the surface of a base material.
Compared with the prior art, the invention overcomes the defects of the oily low-surface treatment coating, simultaneously realizes the thick film formation of the coating film (the thickness of the one-time film formation is higher than 300 mu m), meets the application requirements of the low-surface treatment coating in the field of heavy corrosion resistance, and simultaneously realizes the extremely low discharge of VOCs.
Detailed Description
The technical solution of the present invention is further described below with reference to specific examples.
The invention provides a water-based anticorrosive paint which comprises a component A and a component B, wherein the raw materials and the mass fractions of the raw materials of the component A and the component B are shown in Table 1.
TABLE 1 raw materials and their parts by weight
Wherein the solid content of the water-based epoxy emulsion is greater than or equal to 70%, the epoxy equivalent is 450-550, the viscosity is less than 500cP, and the water-based epoxy emulsion does not contain any solvent; the rust-proof pigment is ZPA (zinc phosphate, example 1), ZPA, RZ (the proportion is 9:1, RZ is organic rust-proof pigment, zinc containing 5-nitro isophthalic acid, example 2), CAPP (hydrated calcium aluminium polyphosphate silicate, examples 3 and 4), the pigment filler is formed by mixing titanium dioxide, iron oxide red and silicon carbide according to the mass ratio of 1:0.5:5, the fineness is 800-1250, the wetting dispersant is Zhanxin 6208, the adhesion promoter is 7520 of dark bamboo, the corrosion inhibitor is 142DA of Ascadi of France, the rust conversion agent is X2 of Ascadi of France, the defoaming agent is TEGO 904W, the flash rust inhibitor is Raybo-90 of Rebao of America, the anti-sagging agent is 12W of Tao chemistry, and the substrate wetting agent is creative TEGO 4100; the solid content of the water-based amine curing agent is more than or equal to 75%, the active hydrogen equivalent is between 100 and 200, the viscosity is less than 15000cP, and the water-based amine curing agent does not contain any solvent.
The preparation method of the water-based anticorrosive paint of the above embodiments 1 to 4 comprises the following steps:
(1) dispersing the waterborne epoxy emulsion, the wetting dispersant, the defoaming agent and the deionized water for 10min at a speed of 600 r/min; then adding the pigment and the filler and the anti-rust pigment for 2000r/min to disperse for 15 min; then, an adhesion promoter, a corrosion inhibitor, a rust converting agent, an anti-flash rust agent, a base material wetting agent and an anti-sagging agent are sequentially added into the dispersed powder, and the mixture is dispersed for 10min at a speed of 800r/min to obtain a component A.
(2) And (4) packaging the aqueous amine curing agent to obtain the component B.
The component A and the component B in the above examples 1-4 are mixed and mixed according to the mass ratio of 10:1, 8:1 and 7:1 respectively, diluted with water to 65KU for spraying, and detected according to HG/T4564-2013 "Low surface treatment tolerant epoxy coating", and the detection results are shown in Table 2.
TABLE 2 Performance test results of aqueous anticorrosive coatings
The test result shows that the nonvolatile content of the waterborne low-surface-treatment anticorrosive coating in the embodiments 1 to 4 is more than or equal to 88%, and compared with CN110218503A (80.0-81.5%) in the prior art, the nonvolatile content of the waterborne low-surface-treatment anticorrosive coating is remarkably improved, and the solid content requirement of the ultrahigh-solid-content epoxy coating in the group standard of definition of epoxy coating with high content of low VOCs (low volatile organic compounds), ultrahigh solid content and no solvent is met. In addition, the thickness of the one-time coating dry film of the embodiment 1-4 is more than or equal to 300 μm, which is improved by more than 150% compared with the CN110218503A (more than or equal to 120 μm) in the prior art. Meanwhile, according to the raw materials of the embodiments 1 to 4, the VOCs of the waterborne low-surface-treatment anticorrosive coatings of the embodiments 1 to 4 is calculated to be less than 15g/L in theory. In addition, the water-based anticorrosive coatings of embodiments 1 to 4 also have the advantages of high drying speed, salt mist resistance, water resistance, good flexibility, strong adhesive force, strong impact resistance, good compatibility and the like.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. The water-based low-surface-treatment anticorrosive paint is characterized by comprising the following components in parts by weight: the water-based low-surface-treatment anticorrosive paint comprises a component A and a component B, wherein the component A comprises the following raw materials: the component B comprises a water-based amine curing agent; the solid content of the waterborne epoxy emulsion is more than or equal to 70 percent, and the viscosity is less than 500 cP; the solid content of the aqueous amine curing agent is greater than or equal to 75%.
2. The aqueous low surface treatment anticorrosive paint according to claim 1, characterized in that: the mass ratio of the component A to the component B is (6-11): 1.
3. the aqueous low surface treatment anticorrosive paint according to claim 1, characterized in that: the raw materials of the component A also comprise an antirust pigment.
4. The aqueous low surface treatment anticorrosive paint according to claim 3, characterized in that: the auxiliary agent comprises a wetting dispersant, an adhesion promoter, a corrosion inhibitor, a rust converting agent, a defoaming agent, an anti-flash rust agent, an anti-sagging agent and a base material wetting agent.
5. The aqueous low surface treatment anticorrosive paint according to claim 4, characterized in that: the water-based low-surface-treatment anticorrosive paint comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight:
20-30 parts of water-based epoxy emulsion
5-15 parts of antirust pigment
50-60 parts of pigment and filler
0.1-0.5 part of wetting dispersant
1-3 parts of adhesion promoter
1-3 parts of corrosion inhibitor
1-5 parts of rust converting agent
0.1 to 0.5 portion of defoaming agent
0.5-3 parts of flash rust inhibitor
0.5-1.5 parts of anti-sagging agent
0.1 to 1.0 portion of base material wetting agent
The component B comprises the following raw materials in parts by weight:
10-15 parts of a water-based amine curing agent.
6. The aqueous low surface treatment anticorrosive paint according to claim 5, characterized in that: the component A also comprises water, and the water accounts for 0-2 parts by weight.
7. The aqueous low surface treatment anticorrosive coating according to any one of claims 3 to 6, characterized in that: the anti-rust pigment is selected from one or more of zinc phosphate, organic modified zinc phosphate, aluminum tripolyphosphate, molybdenum zinc phosphate, zinc silicate and organic anti-rust pigments.
8. A preparation method of the water-based low surface treatment anticorrosive paint disclosed by any one of claims 3 to 6 is characterized by comprising the following steps: the method comprises the following steps:
(1) mixing the raw materials of the component A to obtain a component A;
(2) and packaging the water-based amine curing agent to obtain the component B.
9. The preparation method of the water-based low-surface-treatment anticorrosive paint according to claim 8, characterized in that: the raw material mixing method in the step (1) is that the water-based epoxy emulsion, the wetting dispersant, the defoaming agent and the water are stirred and dispersed uniformly; then adding pigment filler and antirust pigment to disperse until the fineness is less than or equal to 60 mu m; then adding an adhesion promoter, a corrosion inhibitor, a rust converting agent, an anti-flash rust agent, a base material wetting agent and an anti-sagging agent into the dispersed slurry, and uniformly stirring to obtain the component A.
10. The application of the water-based low-surface-treatment anticorrosive paint disclosed by any one of claims 1 to 6 in the field of surface corrosion prevention.
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| CN202010972645.7A CN112210271A (en) | 2020-09-16 | 2020-09-16 | Water-based low-surface-treatment anticorrosive paint and preparation method and application thereof |
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| CN202010972645.7A CN112210271A (en) | 2020-09-16 | 2020-09-16 | Water-based low-surface-treatment anticorrosive paint and preparation method and application thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115895400A (en) * | 2022-11-24 | 2023-04-04 | 江苏金陵特种涂料有限公司 | Low-surface-treatment water-based epoxy coating and preparation method thereof |
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Cited By (2)
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| CN115895400A (en) * | 2022-11-24 | 2023-04-04 | 江苏金陵特种涂料有限公司 | Low-surface-treatment water-based epoxy coating and preparation method thereof |
| CN115895400B (en) * | 2022-11-24 | 2024-02-02 | 江苏金陵特种涂料有限公司 | Low-surface-treatment water-based epoxy paint and preparation method thereof |
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Application publication date: 20210112 |