CN113999592A - Waterborne epoxy rusty anticorrosive paint, and preparation method and application thereof - Google Patents
Waterborne epoxy rusty anticorrosive paint, and preparation method and application thereof Download PDFInfo
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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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- 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
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- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C08K2003/2241—Titanium dioxide
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- C08K2003/3045—Sulfates
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- 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
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- C08K2003/325—Calcium, strontium or barium phosphate
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Abstract
The invention provides a water-based epoxy rusted anticorrosive paint which is prepared from a component A and a component B, wherein the mass ratio of the component A to the component B is 4-8: 1; wherein the component A comprises the following raw materials in parts by weight: 60-100 parts of water-based epoxy resin, 10-15 parts of corrosion inhibitor, 10-15 parts of anticorrosive filler, 25-35 parts of pigment filler, 0.1-1.5 parts of defoaming agent, 0.1-1 part of substrate surface wetting agent, 4-8 parts of wetting dispersant, 4-9 parts of cosolvent, 15-25 parts of deionized water and 0.5-1.5 parts of adhesion promoter; the component B comprises the following raw materials in parts by weight: 15-25 parts of curing agent, 2.5-4 parts of anti-flash rust agent, 4-10 parts of rust stabilizer and 10-15 parts of deionized water. The invention also provides a preparation method and application of the coating. The paint can be directly coated on a steel substrate without the rust, and the adhesion of the coating can reach level 1 due to the existence of rust conversion/stable rust corrosion effect and the matching of an adhesion promoter, the water resistance of a paint film exceeds 350h, the neutral salt spray resistance exceeds 800 h, and the excellent anticorrosion effect is realized.
Description
Technical Field
The invention relates to the technical field of anticorrosive coatings, and particularly relates to a water-based epoxy anticorrosive coating with rust, a preparation method and application thereof.
Background
The rusty anticorrosive paint can be directly coated on the surface of a rusty base material which cannot remove rust or has incomplete rust removal, so that the problems of dust pollution and noise pollution caused by rust removal in site construction are avoided, the difficulty of site construction operation is reduced, and the harm to a human body is reduced. The solvent type rusty anticorrosive paint is mainly used at present due to the characteristics of easy volatilization of organic solvents, quick curing and drying of the paint, low cost and the like. But the organic solvent is easy to volatilize in the drying and curing process, so that the problem of environmental pollution is serious.
The water-based rusted anticorrosive paint takes water as a solvent, has extremely low solvent content and low environmental pollution degree, and meets the requirement of environmental protection. The rust coating needs to polish the floating rust off so as to facilitate the construction process and improve the adhesive force of the coating. The residual rust on the polished rusted surface is more active and can be coated only by being stabilized through special treatment. At present, the mature water-based rusty anticorrosive paint is formed by separately coating a primer and a finish paint, firstly, a rust conversion primer is coated, and then, an anticorrosive finish paint is coated after the primer is dried, so that the process is complex, and the problem of matching applicability of the primer and the finish paint needs to be considered. In addition, at present, zinc-containing phosphate and other substances are commonly used as corrosion inhibitors for the water-based rust-bearing anticorrosive paint, and tannic acid or phosphoric acid is used as a rust stabilizer. However, the acidic corrosion inhibitor or the corrosion stabilizer is added into most of the existing aqueous emulsions, the acidity causes the aqueous emulsions to be incompatible with aqueous resins, the problems of slow demulsification, drying and curing and the like exist, the paint film has poor adhesion, the film is not uniform, the corrosion resistance of the paint film is influenced, and the zinc-containing corrosion inhibitor does not belong to an environment-friendly corrosion inhibitor.
Therefore, the environment-friendly water-based rust anti-corrosion coating which can be directly coated on the rusty base material and has excellent adhesive force, good anti-corrosion performance and quick drying is developed, and has obvious economic benefit and environmental benefit for the anti-corrosion maintenance of steel.
Disclosure of Invention
The invention provides a water-based epoxy rusty anticorrosive paint, a preparation method and application thereof, and solves the problems that the water-based rusty anticorrosive paint in the prior art is poor in adhesive force, uneven in film forming, influences the anticorrosive performance of a paint film, is not environment-friendly and the like.
The technical scheme of the invention is realized as follows:
according to a first aspect of embodiments of the present invention, there is provided a water-based epoxy rusted anticorrosive paint.
In one embodiment, the water-based epoxy rust-carrying anticorrosive paint is prepared from a component A and a component B, wherein the mass ratio of the component A to the component B is 4-8: 1; wherein the content of the first and second substances,
the component A comprises the following raw materials in parts by weight: 60-100 parts of water-based epoxy resin, 10-15 parts of corrosion inhibitor, 10-15 parts of anticorrosive filler, 25-35 parts of pigment filler, 0.1-1.5 parts of defoaming agent, 0.1-1 part of substrate surface wetting agent, 4-8 parts of wetting dispersant, 4-9 parts of cosolvent, 15-25 parts of deionized water and 0.5-1.5 parts of adhesion promoter;
the component B comprises the following raw materials in parts by weight: 15-25 parts of curing agent, 2.5-4 parts of anti-flash rust agent, 4-10 parts of rust stabilizer and 10-15 parts of deionized water.
Optionally, the water-based epoxy rust-bearing anticorrosive paint is prepared from a component A and a component B, wherein the mass ratio of the component A to the component B is 5: 1; wherein the content of the first and second substances,
the component A comprises the following raw materials in parts by weight: 100 parts of waterborne epoxy resin, 12 parts of corrosion inhibitor, 15 parts of anticorrosive filler, 30 parts of pigment filler, 1 part of defoaming agent, 0.5 part of base material surface wetting agent, 6 parts of wetting dispersant, 4 parts of cosolvent, 15 parts of deionized water and 1 part of adhesion promoter;
the component B comprises the following raw materials in parts by weight: 15 parts of curing agent, 2.5 parts of anti-flash rust agent, 8 parts of rust stabilizer and 15 parts of deionized water.
Optionally, the solid content of the waterborne epoxy resin is 50-60%, and the epoxy equivalent of the waterborne epoxy resin is 500-700 g/eq.
Optionally, the corrosion inhibitor is strontium phosphosilicate, calcium phosphate or calcium phosphosilicate with the particle size of 4.5-5.0 mu m.
Optionally, the anticorrosive filler is a mixture of wollastonite and mica sheets, wherein the mass ratio of the wollastonite to the mica sheets is 30-40: 1.
Optionally, the pigment and filler is one or more of a titanium dioxide functional auxiliary agent, precipitated barium sulfate and talcum powder.
Optionally, the defoamer is a polyether modified polydimethylsiloxane or mineral oil based defoamer suitable for aqueous coating systems.
Optionally, the substrate surface wetting agent is a polyether modified siloxane.
Optionally, the wetting and dispersing agent is an aqueous emulsion of a structured acrylic copolymer containing pigment affinic groups.
Optionally, the co-solvent is at least one of dipropylene glycol butyl ether and propylene glycol phenyl ether.
Optionally, the adhesion promoter is 2- (3, 4-epoxycyclohexane) ethyltriethoxysilane.
Optionally, the curing agent is a fatty amine curing agent, and the amine value of the curing agent is 235-265 mg/g.
Optionally, the anti-flash rust agent is an aqueous solution of sodium nitrite, an aqueous solution of ammonium benzoate, or an aqueous solution of N, N' -dimethylethanolamine.
Optionally, the rust stabilizer is a polyaspartic acid fatty amine salt.
Alternatively, the polyaspartic acid fatty amine salt is prepared by the following steps:
dissolving polyaspartic acid powder in deionized water to obtain a polyaspartic acid solution with the mass concentration of 40%, and adding fatty tertiary amine into the obtained polyaspartic acid solution until the pH value is 7 to obtain polyaspartic acid fatty ammonium salt.
According to a second aspect of the embodiments of the present invention, there is provided a method for preparing the above water-based epoxy rusty anticorrosive paint.
In one embodiment, the preparation method of the water-based epoxy rusted anticorrosive paint comprises the following steps:
preparation of a component A: adding water-based epoxy resin into the slurry, adding a cosolvent, 1/3 parts by mass of a defoaming agent and an adhesion promoter, and stirring and dispersing at the stirring speed of 800-1000 rpm for 30-60 min to obtain a component A;
b, preparation of a component: mixing and stirring the deionized water, the curing agent, the flash rust inhibitor and the rust stabilizer uniformly to prepare a component B;
and uniformly stirring and mixing the component A and the component B according to the proportion to obtain the waterborne epoxy rusty anticorrosive paint.
Optionally, the slurry is prepared by:
and sequentially adding deionized water, 2/3 parts by mass of defoaming agent, 2/3 parts by mass of wetting dispersant and a substrate surface wetting agent into a grinding tank, uniformly stirring, adding corrosion inhibitor, anticorrosive filler and pigment filler, and grinding and dispersing to obtain the slurry.
Optionally, the grinding speed is 1000-2500 rpm, and the grinding time is 60-150 min.
Optionally, in the step of preparing the component A, the stirring speed is 800-1000 rpm, and the stirring time is 30-60 min.
According to a third aspect of the embodiments of the present invention, there is provided a use of the above water-based epoxy rusted anticorrosive paint.
In one embodiment, the waterborne epoxy rust anticorrosive paint is applied to outdoor steel structures.
The invention has the beneficial effects that:
1. the invention adopts polyaspartic acid fatty ammonium salt as a corrosion stabilizer, carboxyl in the structure of the polyaspartic acid fatty ammonium salt can be combined with iron ions to form a chelate, and the chelate is adsorbed on the surface of a steel substrate to form a layer of protective film, thereby playing a good corrosion inhibition role. The invention integrates the corrosion inhibition effect of fatty amine, and prepares polyaspartic acid into corresponding ammonium salt, and uses fatty tertiary amine to avoid losing nucleophilicity due to the combination of primary amine and secondary amine with weak alkalinity in a curing agent and carboxyl in polyaspartic acid by utilizing the higher alkalinity of the fatty tertiary amine. The pH value of the fatty ammonium salt of the polyaspartic acid is neutral, the storage stability of the emulsified water-based resin curing agent is not influenced, the rust conversion/rust stabilization effect is moderate, and only a protective film is formed on the surface of a rust layer, so that additional corrosion caused by excessive rust conversion cannot be generated. The raw material of the fatty amine salt of the polyaspartic acid is synthesized by a biological method, has low toxicity, can be decomposed biologically, and is an environment-friendly rust stabilizer.
2. The invention adopts strontium phosphosilicate, calcium phosphate or calcium phosphosilicate to replace the commonly used phosphoric acid corrosion inhibitors such as zinc phosphate, aluminum tripolyphosphate and the like. According to the invention, the corrosion inhibitor with fine particles is adopted and matched with a proper wetting dispersant, so that the corrosion inhibitor is more easily dispersed in the water-based epoxy resin and can stably exist, the storage stability of the coating is improved, the alkalescence of the corrosion inhibitor can improve the activity of an amine curing agent, the epoxy crosslinking reaction speed is improved, the maintenance period of the coating after construction is reduced, and the coating can reach the service standard after being maintained for 5 days at room temperature after being coated; the corrosion inhibitor adopted by the invention does not contain zinc, and meets the regulation of environment-friendly coatings.
3. The wollastonite and the mica sheets adopted by the invention can play a role in increasing the diffusion path of corrosion factors in the coating and improving the barrier property of a paint film due to higher specific surface area and self compactness. The titanium dioxide functional auxiliary agent, the precipitated barium sulfate and the talcum powder are used as pigments and fillers, so that the hardness and the water resistance of a paint film can be improved, and the cost of the paint is reduced. The proper amount of cosolvent can improve the fusion degree of polymer particles in the aqueous emulsion and increase the compactness of a paint film without remarkably increasing the emission of organic matters. The matching of the proper surface wetting agent and the wetting dispersant can enhance the wetting effect of the paint on the base material while improving the water resistance of the paint film.
4. The preparation method adopts a two-component design, the coating components with reactivity are separately stored, the storage stability of the coating is favorably improved, and the paint film compactness of the two-component epoxy is high, so that the anti-corrosion protection is favorably realized.
Detailed Description
To make the features and effects of the present invention comprehensible to those having ordinary knowledge in the art, general description and definitions are made with respect to terms and phrases mentioned in the specification and claims. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
In this document, the terms "comprising," "including," "having," "containing," or any other similar term, are intended to be open-ended franslational phrase (open-ended franslational phrase) and are intended to cover non-exclusive inclusions. For example, a composition or article comprising a plurality of elements is not limited to only those elements recited herein, but may include other elements not expressly listed but generally inherent to such composition or article. In addition, unless expressly stated to the contrary, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or". For example, the condition "a or B" is satisfied in any of the following cases: a is true (or present) and B is false (or not present), a is false (or not present) and B is true (or present), both a and B are true (or present). Furthermore, in this document, the terms "comprising," including, "" having, "" containing, "and" containing "are to be construed as specifically disclosed and to cover both closed and semi-closed conjunctions, such as" consisting of … "and" consisting essentially of ….
All features or conditions defined herein as numerical ranges or percentage ranges are for brevity and convenience only. Accordingly, the description of numerical ranges or percentage ranges should be considered to have covered and specifically disclosed all possible subranges and individual numerical values within the ranges, particularly integer numerical values. For example, a description of a range of "1 to 8" should be considered to have specifically disclosed all subranges such as 1 to 7, 2 to 8, 2 to 6, 3 to 6, 4 to 8, 3 to 8, and so on, particularly subranges bounded by all integer values, and should be considered to have specifically disclosed individual values such as 1, 2, 3,4, 5, 6, 7, 8, and so on, within the range. Unless otherwise indicated, the foregoing explanatory methods apply to all matters contained in the entire disclosure, whether broad or not.
If an amount or other value or parameter is expressed as a range, preferred range, or a list of upper and lower limits, it is to be understood that all ranges subsumed therein for any pair of that range's upper or preferred value and that range's lower or preferred value, whether or not such ranges are separately disclosed, are specifically disclosed herein. Further, when a range of numerical values is recited herein, unless otherwise stated, the range is intended to include the endpoints thereof, and all integers and fractions within the range.
In this context, numerical values should be understood to have the precision of the number of significant digits of the value, provided that the object of the invention is achieved. For example, the number 40.0 should be understood to cover a range from 39.50 to 40.49. In this document, where Markush group (Markush group) or Option language is used to describe features or examples of the invention, those skilled in the art will recognize that a sub-group of all elements or any individual element within a Markush group or list of options may also be used to describe the invention. For example, if X is described as "selected from the group consisting of1、X2And X3The group "also indicates that X has been fully described as X1Is claimed with X1And/or X2Claim (5). Furthermore, where Markush group or option terms are used to describe features or examples of the invention, those skilled in the art will recognize that any combination of sub-groups of all elements or individual elements within the Markush group or option list can also be used to describe the invention. Accordingly, for example, if X is described as "selected from the group consisting of1、X2And X3Group consisting of "and Y is described as" selected from Y1、Y2And Y3The group "formed indicates that X has been fully described as X1Or X2Or X3And Y is Y1Or Y2Or Y3Claim (5).
The following detailed description is merely exemplary in nature and is not intended to limit the invention or the application thereof. Furthermore, there is no intention to be bound by any theory presented in the preceding prior art or the summary of the invention or the following detailed description or examples.
Example 1
A waterborne epoxy rusty anticorrosive paint is prepared from a component A and a component B, wherein the mass ratio of the component A to the component B is 5: 1; wherein the content of the first and second substances,
the component A comprises the following raw materials in parts by weight: 100 parts of waterborne epoxy resin, 12 parts of corrosion inhibitor, 15 parts of anticorrosive filler, 30 parts of pigment filler, 1 part of defoaming agent, 0.5 part of base material surface wetting agent, 6 parts of wetting dispersant, 4 parts of cosolvent, 15 parts of deionized water and 1.2 parts of adhesion promoter;
the component B comprises the following raw materials in parts by weight: 15 parts of curing agent, 2.5 parts of anti-flash rust agent, 8 parts of rust stabilizer and 15 parts of deionized water.
Optionally, the solid content of the waterborne epoxy resin is 50-60%, the epoxy equivalent of the waterborne epoxy resin is 500-700 g/eq, and in the embodiment, the waterborne epoxy resin is Vast Epikote 6520-WH-53.
Optionally, the corrosion inhibitor is strontium phosphosilicate with the particle size of 4.5-5.0 μm.
Optionally, the anticorrosive filler is a mixture of wollastonite and mica sheets, wherein the mass ratio of the wollastonite to the mica sheets is 30: 1.
Optionally, the pigment and filler is a titanium dioxide functional additive.
Optionally, the defoamer is a polyether modified polydimethylsiloxane or mineral oil based defoamer suitable for aqueous coating systems, in this example basf MO 2190 is used.
Optionally, the substrate surface wetting agent is a polyether modified siloxane.
Optionally, the wetting and dispersing agent is an aqueous emulsion of a structured acrylic copolymer containing pigment affinic groups, in this example, BYK chemical BYK-2010 is used.
Optionally, the co-solvent is dipropylene glycol butyl ether.
Optionally, the adhesion promoter is 2- (3, 4-epoxycyclohexane) ethyltriethoxysilane.
Optionally, the curing agent is aliphatic amine curing agent with an amine value of 235-265 mg/g, in this example, Vast Epikure 6870-W-53 is used.
Optionally, the flash rust inhibitor is a 10% sodium nitrite aqueous solution.
Optionally, the rust stabilizer is a polyaspartic acid fatty amine salt.
Alternatively, the polyaspartic acid fatty amine salt is prepared according to the following steps:
dissolving polyaspartic acid powder in deionized water to obtain a polyaspartic acid solution with the mass concentration of 40%, and adding N, N' -dimethyldodecylamine into the obtained polyaspartic acid solution until the pH value is 7 to obtain polyaspartic acid fatty ammonium salt.
The preparation method of the waterborne epoxy rust-bearing anticorrosive paint comprises the following steps:
preparation of a component A: adding water-based epoxy resin into the slurry, adding a cosolvent, 1/3 parts by mass of a defoaming agent and an adhesion promoter, and stirring and dispersing at the stirring speed of 800-1000 rpm for 30-60 min to obtain a component A;
b, preparation of a component: mixing and stirring the deionized water, the curing agent, the flash rust inhibitor and the rust stabilizer uniformly to prepare a component B;
and uniformly stirring and mixing the component A and the component B according to the proportion to obtain the waterborne epoxy rusty anticorrosive paint.
Optionally, the slurry is prepared according to the following steps:
and sequentially adding deionized water, 2/3 parts by mass of defoaming agent, 2/3 parts by mass of wetting dispersant and a substrate surface wetting agent into a grinding tank, uniformly stirring, adding a corrosion inhibitor, an anticorrosive filler and a pigment filler, grinding and dispersing at the grinding speed of 1000-2500 rpm for 60-150 min to obtain the slurry.
Example 2
A waterborne epoxy rusty anticorrosive paint is prepared from a component A and a component B, wherein the mass ratio of the component A to the component B is 6: 1; wherein the content of the first and second substances,
the component A comprises the following raw materials in parts by weight: 100 parts of water-based epoxy resin, 15 parts of corrosion inhibitor, 15 parts of anticorrosive filler, 30 parts of pigment filler, 0.2 part of defoaming agent, 0.5 part of substrate surface wetting agent, 6 parts of wetting dispersant, 8 parts of cosolvent, 15 parts of deionized water and 1.2 parts of adhesion promoter;
the component B comprises the following raw materials in parts by weight: 20 parts of curing agent, 4 parts of anti-flash rust agent, 8 parts of rust stabilizer and 15 parts of deionized water.
Optionally, the solid content of the waterborne epoxy resin is 50-60%, the epoxy equivalent of the waterborne epoxy resin is 500-700 g/eq, and in the embodiment, the waterborne epoxy resin is Vast Epikote 6520-WH-53.
Optionally, the corrosion inhibitor is calcium phosphate with the particle size of 4.5-5.0 μm.
Optionally, the anticorrosive filler is wollastonite and mica sheets, wherein the mass ratio of the wollastonite to the mica sheets is 35: 1.
Optionally, the pigment filler is precipitated barium sulfate.
Alternatively, the defoamer is a polyether modified polydimethylsiloxane or mineral oil based defoamer suitable for aqueous coating systems, in this example basf MO 2162 is employed.
Optionally, the substrate surface wetting agent is a polyether modified siloxane.
Optionally, the wetting and dispersing agent is an aqueous emulsion of a structured acrylic copolymer containing pigment affinity groups, in this example, BYK chemical BYK-192 is used.
Optionally, the co-solvent is dipropylene glycol butyl ether.
Optionally, the adhesion promoter is 2- (3, 4-epoxycyclohexane) ethyltriethoxysilane.
Optionally, the curing agent is aliphatic amine curing agent with an amine value of 235-265 mg/g, in this example, Vast Epikure 6870-W-53 is used.
Optionally, the anti-flash rust agent is an aqueous ammonium benzoate solution with a concentration of 15%.
Optionally, the rust stabilizer is a polyaspartic acid fatty amine salt.
Alternatively, the polyaspartic acid fatty amine salt is prepared according to the following steps:
dissolving polyaspartic acid powder in deionized water to obtain a polyaspartic acid solution with the mass concentration of 40%, and adding N, N' -dimethyldecylamine into the obtained polyaspartic acid solution until the pH value is 7 to obtain polyaspartic acid fatty ammonium salt.
The preparation method comprises the following steps: the same as in example 1.
Example 3
A waterborne epoxy rusty anticorrosive paint is prepared from a component A and a component B, wherein the mass ratio of the component A to the component B is 4: 1; wherein the content of the first and second substances,
the component A comprises the following raw materials in parts by weight: 80 parts of water-based epoxy resin, 10 parts of corrosion inhibitor, 10 parts of anticorrosive filler, 30 parts of pigment filler, 1.5 parts of defoaming agent, 1 part of substrate surface wetting agent, 4 parts of wetting dispersant, 6 parts of cosolvent, 25 parts of deionized water and 1 part of adhesion promoter;
the component B comprises the following raw materials in parts by weight: 15 parts of curing agent, 2.5 parts of anti-flash rust agent, 6 parts of rust stabilizer and 10 parts of deionized water.
Optionally, the solid content of the waterborne epoxy resin is 50-60%, the epoxy equivalent of the waterborne epoxy resin is 500-700 g/eq, and in the embodiment, the waterborne epoxy resin is Vast Epikote 6520-WH-53.
Optionally, the corrosion inhibitor is calcium phosphosilicate with a particle size of 4.5-5.0 μm.
Optionally, the anticorrosive filler is wollastonite and mica sheets, wherein the mass ratio of the wollastonite to the mica sheets is 40: 1.
Optionally, the pigment and filler is talc.
Optionally, the defoamer is polyether modified polydimethylsiloxane or mineral oil based defoamer suitable for aqueous coating systems, in this example BYK-019 is used.
Optionally, the substrate surface wetting agent is a polyether modified siloxane.
Optionally, the wetting and dispersing agent is an aqueous emulsion of a structured acrylic copolymer containing pigment affinity groups, in this example, BYK chemical BYK-192 is used.
Optionally, the co-solvent is dipropylene glycol butyl ether.
Optionally, the adhesion promoter is 2- (3, 4-epoxycyclohexane) ethyltriethoxysilane.
Optionally, the curing agent is aliphatic amine curing agent with an amine value of 235-265 mg/g, in this example, Vast Epikure 6870-W-53 is used.
Optionally, the anti-flash rust agent is a 10% aqueous solution of N, N' -dimethylethanolamine.
Optionally, the rust stabilizer is a polyaspartic acid fatty amine salt.
Alternatively, the polyaspartic acid fatty amine salt is prepared according to the following steps:
dissolving polyaspartic acid powder in deionized water to obtain a polyaspartic acid solution with the mass concentration of 40%, and adding N, N' -dimethyl N-octylamine into the obtained polyaspartic acid solution until the pH value is 7 to obtain polyaspartic acid fatty ammonium salt.
The preparation method comprises the following steps: the same as in example 1.
The aqueous epoxy rusty anticorrosive coatings prepared in examples 1-3 were uniformly mixed, directly coated on a rusty steel plate by spraying or brushing at 25 ℃, cured to obtain a flat, smooth, dense and uniform paint film, and the results of the performance tests on the paint film are shown in table 1.
Wherein the thickness of the coating is measured by a thickness difference method in GB/T13452.2-2008 'measuring Standard for paint film thickness of color paint and varnish'.
The surface drying time and the actual drying time of the paint are measured according to GB/T1728-2020 method for measuring the drying time of paint films and putty films.
The paint adhesion rating is determined in accordance with GB/T9286-1998 test for marking test for paint and varnish films.
The coating flexibility was determined according to GB/T1731-1993 paint flexibility determination.
The water resistance of the coating was determined according to GB/T1733 + 1993 test for Water resistance of paint films.
The neutral salt spray resistance of the coating is determined according to GB/T1771-2007 determination of neutral salt spray resistance of colored paint and varnish.
The ageing resistance of the coating is determined according to GB/T1865-2009 Artificial weathering and Artificial radiation Exposure of paints and varnishes.
Table 1 results of performance testing
| Detecting items | Example 1 | Example 2 | Example 3 |
| Thickness of one coat/μm | 40～60 | 35～50 | 40～60 |
| Total coating thickness/. mu.m | 80～110 | 75～100 | 80～110 |
| Surface drying time/h | 1.5 | 1.5 | 1.5 |
| Actual drying time/h | <24 | <24 | <24 |
| Adhesion/grade | 1 | 1 | 1 |
| Flexibility/mm | 1 | 2 | 2 |
| Water resistance/h | ＞350 | ＞350 | ＞350 |
| Neutral salt fog resistance per hour | 850 | 800 | 800 |
| Aging resistance/h | ＞1000 | ＞1000 | ＞1000 |
As can be seen from the data in Table 1, the water-based rust-carrying anticorrosive paint prepared by the invention can be directly coated on a steel substrate without floating rust, the adhesion of the coating can reach 1-grade adhesion due to the existence of stable rust and the matching of a proper adhesion promoter, the water resistance of the paint film exceeds 350h, the neutral salt spray resistance exceeds 800 h, the excellent anticorrosive effect is realized, and the construction mode is simple and convenient. The water-based rusty anticorrosive paint disclosed by the invention can achieve excellent adhesive force on a simply-treated rusty surface, and is excellent in construction simplicity; the flexibility is good, and the material has certain impact-resistant mechanical property; the water resistance and the neutral salt spray resistance are excellent, and the corrosion resistance is excellent; the anti-aging performance is good, so that the outdoor service performance is excellent.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (16)
1. The water-based epoxy rust-bearing anticorrosive paint is characterized by being prepared from a component A and a component B, wherein the mass ratio of the component A to the component B is 4-8: 1; wherein the content of the first and second substances,
the component A comprises the following raw materials in parts by weight: 60-100 parts of water-based epoxy resin, 10-15 parts of corrosion inhibitor, 10-15 parts of anticorrosive filler, 25-35 parts of pigment filler, 0.1-1.5 parts of defoaming agent, 0.1-1 part of substrate surface wetting agent, 4-8 parts of wetting dispersant, 4-9 parts of cosolvent, 15-25 parts of deionized water and 0.5-1.5 parts of adhesion promoter;
the component B comprises the following raw materials in parts by weight: 15-25 parts of curing agent, 2.5-4 parts of anti-flash rust agent, 4-10 parts of rust stabilizer and 10-15 parts of deionized water.
2. The water-based epoxy rust-bearing anticorrosive paint as claimed in claim 1, which is prepared from a component A and a component B, wherein the mass ratio of the component A to the component B is 5: 1; wherein the content of the first and second substances,
the component A comprises the following raw materials in parts by weight: 100 parts of waterborne epoxy resin, 12 parts of corrosion inhibitor, 15 parts of anticorrosive filler, 30 parts of pigment filler, 1 part of defoaming agent, 0.5 part of base material surface wetting agent, 6 parts of wetting dispersant, 4 parts of cosolvent, 15 parts of deionized water and 1 part of adhesion promoter;
the component B comprises the following raw materials in parts by weight: 15 parts of curing agent, 2.5 parts of anti-flash rust agent, 8 parts of rust stabilizer and 15 parts of deionized water.
3. The water-based epoxy rust-bearing anticorrosive paint as claimed in claim 1, wherein the solid content of the water-based epoxy resin is 50-60%, and the epoxy equivalent of the water-based epoxy resin is 500-700 g/eq.
4. The water-based epoxy rust-bearing anticorrosive paint according to claim 1, wherein the corrosion inhibitor is strontium phosphosilicate, calcium phosphate or calcium phosphosilicate with a particle size of 4.5-5.0 μm.
5. The water-based epoxy rust-carrying anticorrosive paint as claimed in claim 1, wherein the anticorrosive filler is a mixture of wollastonite and mica sheets, and the mass ratio of the wollastonite to the mica sheets is 30-40: 1.
6. The waterborne epoxy rust anticorrosive paint according to claim 1,
the pigment and filler is any one or combination of more of titanium dioxide functional auxiliary agent, precipitated barium sulfate and talcum powder;
the defoaming agent is polyether modified polydimethylsiloxane or mineral oil-based defoaming agent suitable for a water-based coating system;
the substrate surface wetting agent is polyether modified siloxane;
the wetting and dispersing agent is an aqueous emulsion of a structured acrylic copolymer containing pigment affinity groups.
7. The aqueous epoxy rust inhibitive coating of claim 1 wherein the co-solvent is at least one of dipropylene glycol butyl ether and propylene glycol phenyl ether.
8. The aqueous epoxy rust anticorrosive paint of claim 1, wherein the adhesion promoter is 2- (3, 4-epoxycyclohexane) ethyltriethoxysilane.
9. The water-based epoxy rust-bearing anticorrosive paint as claimed in claim 1, wherein the curing agent is a fatty amine curing agent, and the amine value of the curing agent is 235-265 mg/g.
10. The aqueous epoxy rusted anticorrosive paint of claim 1, wherein the flash rust inhibitor is an aqueous solution of sodium nitrite, an aqueous solution of ammonium benzoate, or an aqueous solution of N, N' -dimethylethanolamine.
11. The aqueous epoxy rusted anticorrosive paint of claim 1, wherein the rust stabilizer is polyaspartic acid fatty amine salt.
12. The aqueous epoxy rusted anticorrosive paint of claim 11, wherein the polyaspartic acid fatty amine salt is prepared by the following steps:
dissolving polyaspartic acid powder in deionized water to obtain a polyaspartic acid solution with the mass concentration of 40%, and adding fatty tertiary amine into the obtained polyaspartic acid solution until the pH value is 7 to obtain polyaspartic acid fatty ammonium salt.
13. A method for preparing the aqueous epoxy rust inhibitive coating according to any one of claims 1 to 12, comprising the steps of:
preparation of a component A: adding waterborne epoxy resin into the slurry, adding a cosolvent, a defoaming agent in total mass part of 1/3 and an adhesion promoter, and stirring and dispersing to obtain a component A;
b, preparation of a component: mixing and stirring the deionized water, the curing agent, the flash rust inhibitor and the rust stabilizer uniformly to prepare a component B;
and uniformly stirring and mixing the component A and the component B according to the proportion to obtain the waterborne epoxy rusty anticorrosive paint.
14. The method for preparing the water-based epoxy rust-bearing anticorrosive paint according to claim 13, wherein the slurry is prepared by the following steps:
and sequentially adding deionized water, 2/3 parts by mass of defoaming agent, 2/3 parts by mass of wetting dispersant and a substrate surface wetting agent into a grinding tank, uniformly stirring, adding corrosion inhibitor, anticorrosive filler and pigment filler, and grinding and dispersing to obtain the slurry.
15. The method for preparing the waterborne epoxy rust-bearing anticorrosive paint according to claim 13,
in the preparation step of the component A, the stirring speed is 800-1000 rpm, and the stirring time is 30-60 min.
16. Use of a waterborne epoxy rust inhibitive coating according to any one of claims 1 to 12, characterized in that it is applied to outdoor steel structures.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114806344A (en) * | 2022-06-08 | 2022-07-29 | 珠海市威旗防腐科技股份有限公司 | Flame-retardant water-based epoxy coating and preparation method and application thereof |
| CN115058171A (en) * | 2022-06-24 | 2022-09-16 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Low-surface-treatment water-based paint for station house steel structure and preparation method thereof |
| CN115522206A (en) * | 2022-09-30 | 2022-12-27 | 深圳市豪龙新材料技术有限公司 | Cavity filter surface treatment method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5785896A (en) * | 1994-11-03 | 1998-07-28 | Bayer Aktiengesellschaft | Mixture for inhibition of corrosion of metals |
| JPH11350172A (en) * | 1998-06-09 | 1999-12-21 | Nippon Shokubai Co Ltd | Metal corrosion inhibitor |
| CN102753606A (en) * | 2010-02-18 | 2012-10-24 | 三井化学株式会社 | Processes for production of polyaspartic acid precursor polymer and polyaspartic acid salts |
| CN104559668A (en) * | 2015-01-08 | 2015-04-29 | 广东电网有限责任公司电力科学研究院 | Waterborne anticorrosive coating for improving interface bonding force of rusty metal and anticorrosive coating and preparation method thereof |
| CN110894391A (en) * | 2019-11-21 | 2020-03-20 | 无锡市太湖防腐材料有限公司 | Long-acting acid and alkali corrosion resistant water-based epoxy anticorrosive paint and preparation method thereof |
-
2021
- 2021-11-29 CN CN202111432059.4A patent/CN113999592A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5785896A (en) * | 1994-11-03 | 1998-07-28 | Bayer Aktiengesellschaft | Mixture for inhibition of corrosion of metals |
| JPH11350172A (en) * | 1998-06-09 | 1999-12-21 | Nippon Shokubai Co Ltd | Metal corrosion inhibitor |
| CN102753606A (en) * | 2010-02-18 | 2012-10-24 | 三井化学株式会社 | Processes for production of polyaspartic acid precursor polymer and polyaspartic acid salts |
| CN104559668A (en) * | 2015-01-08 | 2015-04-29 | 广东电网有限责任公司电力科学研究院 | Waterborne anticorrosive coating for improving interface bonding force of rusty metal and anticorrosive coating and preparation method thereof |
| CN110894391A (en) * | 2019-11-21 | 2020-03-20 | 无锡市太湖防腐材料有限公司 | Long-acting acid and alkali corrosion resistant water-based epoxy anticorrosive paint and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 国家科委化学建材专业组江苏分组等: "《中国化学建材概览》", 30 September 1993, 中国建材工业出版社 * |
| 李本高等: "《现代工业水处理技术与应用》", 30 June 2004, 中国石化出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114806344A (en) * | 2022-06-08 | 2022-07-29 | 珠海市威旗防腐科技股份有限公司 | Flame-retardant water-based epoxy coating and preparation method and application thereof |
| CN115058171A (en) * | 2022-06-24 | 2022-09-16 | 中国铁道科学研究院集团有限公司金属及化学研究所 | Low-surface-treatment water-based paint for station house steel structure and preparation method thereof |
| CN115522206A (en) * | 2022-09-30 | 2022-12-27 | 深圳市豪龙新材料技术有限公司 | Cavity filter surface treatment method |
| CN115522206B (en) * | 2022-09-30 | 2023-08-15 | 深圳市豪龙新材料技术有限公司 | Surface treatment method for cavity filter |
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