CN112300656A - Environment-friendly two-component epoxy coating and preparation method thereof - Google Patents
Environment-friendly two-component epoxy coating and preparation method thereof Download PDFInfo
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- CN112300656A CN112300656A CN201911118477.9A CN201911118477A CN112300656A CN 112300656 A CN112300656 A CN 112300656A CN 201911118477 A CN201911118477 A CN 201911118477A CN 112300656 A CN112300656 A CN 112300656A
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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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/44—Amides
- C08G59/46—Amides together with other curing agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/62—Alcohols or phenols
- C08G59/625—Hydroxyacids
- C08G59/628—Phenolcarboxylic acids
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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
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
-
- 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
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses an environment-friendly two-component epoxy coating, which is prepared from (5-8) by weight: 1, component A and component B; the component A comprises the following components in parts by weight: 35-50 parts of waterborne epoxy resin, 15-25 parts of special functional waterborne polyurethane resin, 0.5-2 parts of rheological additive, 0.5-1 part of defoaming agent, 3-5 parts of film-forming additive, 0.2-1 part of anti-flash rust agent, 2-5 parts of wetting dispersant, 0.5-1 part of base material wetting agent, 10-30 parts of anticorrosive pigment, 15-25 parts of filler, 0-3 parts of cosolvent and 5-15 parts of deionized water. The two-component epoxy coating provided by the invention has good anticorrosion and protection functions compared with metal substrates.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to an environment-friendly two-component epoxy coating and a preparation method thereof.
Background
The traditional solvent-based bi-component epoxy coating has the advantages of low film-forming temperature, strong adhesive force, good wear resistance, high hardness and the like, and can be widely used as primer for industrial protection, wood furniture and automobiles. However, with the continuous implementation and improvement of environmental protection policies and the continuous enhancement and promotion of environmental protection awareness of consumers, the conventional oil-based coating is gradually replaced by an environmental protection coating, wherein the environmental protection coating represented by a water-based epoxy coating is an important component of the vigorous development of modern green coatings.
The water-based epoxy coating is accepted by the masses of consumers by the characteristics of low VOC, energy conservation, no toxicity and environmental protection, but compared with a solvent-based epoxy anticorrosive coating, the water-based epoxy coating has the advantages of long construction period, narrow construction temperature and humidity range, difficult construction under low temperature (below 15 ℃) and high humidity (above 80% RH), low solid content in construction, slow water volatilization in a product in the construction process, easy occurrence of flash rust in the construction process and unreasonable viscosity design, and the reduction of the anticorrosive performance. Therefore, the existing waterborne epoxy coating products have certain defects in workability, flash rust prevention and corrosion resistance, and the development of the existing waterborne epoxy coating products is limited to a great extent.
Disclosure of Invention
In order to solve the problems in the background art, the invention aims to provide an environment-friendly two-component epoxy coating which has good anticorrosion and protection functions relative to metal substrates (such as iron, aluminum alloy, magnesium aluminum alloy and other alloy substrates). In addition, the invention also provides a preparation method of the environment-friendly two-component epoxy coating.
In order to achieve the purpose, the invention adopts the following technical scheme:
the first aspect of the invention provides an environment-friendly two-component epoxy coating, which is prepared from (5-8) by weight: 1, component A and component B;
the component A comprises the following components in parts by weight:
35-50 parts of waterborne epoxy resin, 15-25 parts of special functional waterborne polyurethane resin, 0.5-2 parts of rheological additive, 0.5-1 part of defoaming agent, 3-5 parts of film-forming additive, 0.2-1 part of anti-flash rust agent, 2-5 parts of wetting dispersant, 0.5-1 part of base material wetting agent, 10-30 parts of anticorrosive pigment, 15-25 parts of filler, 0-3 parts of cosolvent and 5-15 parts of deionized water.
The component B comprises the following components in parts by weight:
15-25 parts of polyamide type waterborne epoxy curing agent, 20-35 parts of cardanol type waterborne epoxy curing agent, 1-5 parts of functional additive, 3-8 parts of film forming additive and 30-45 parts of deionized water.
Preferably, the aqueous epoxy resin consists of bisphenol A type aqueous epoxy resin and bisphenol F type aqueous epoxy resin in a weight ratio of (0.6-1.25): 1.
Preferably, the special functional aqueous polyurethane resin is an epoxy modified aqueous polyurethane resin.
The pigment in the invention is an inorganic pigment. The filler is one or a mixture of more than two of silica micropowder, wollastonite, iron oxide red, talcum powder, barium sulfate and zinc phosphate.
The substrate wetting agent is an organic silicon wetting agent, so that the wettability of the substrate and the flowing and leveling performance of a coating system are improved; the cosolvent is selected from environment-friendly propylene glycol butyl ether or dipropylene glycol butyl ether, so that the VOC content in the coating system is reduced; the defoaming agent is one of foam breaking siloxane solution, foam breaking polysiloxane and silicone oxide polyether emulsion.
Preferably, the anti-corrosion pigment consists of zinc phosphate and aluminum tripolyphosphate in a weight ratio of 1 (0.3-3);
preferably, the functional assistant is an aqueous silane coupling agent.
The second aspect of the present invention provides a method for preparing the above-mentioned environment-friendly two-component epoxy coating, comprising the following steps:
s1, adding a cosolvent into deionized water, uniformly stirring at a low speed, sequentially adding a wetting dispersant, a pigment and an anticorrosive pigment under a stirring state, stirring and mixing for 30-45min, and grinding to obtain a mixed material;
s2, adding the mixed material into the water-based epoxy resin and the special functional polyurethane resin under the stirring state, stirring for 10-15min, then sequentially adding the film-forming aid, the flash rust inhibitor, the defoaming agent, the base material wetting and leveling agent and the filler, stirring and mixing for 10-15min, then adding the rheological aid into the mixture, and stirring uniformly to obtain a component A;
s3, sequentially adding a polyamide type waterborne epoxy curing agent, a cardanol type waterborne epoxy curing agent, a functional assistant and a film forming assistant into deionized water, and uniformly stirring to obtain a component B;
and S4, when in use, the component A and the component B are fully and uniformly mixed according to the proportion, and then construction can be carried out.
Preferably, in the step S1, the grinding fineness is less than or equal to 20 μm.
Compared with the prior art, the invention has the following beneficial effects:
the bi-component epoxy coating disclosed by the invention is prepared by combining bisphenol A type waterborne epoxy resin, bisphenol F type waterborne epoxy resin and special functional waterborne polyurethane resin, selecting polyamide type waterborne epoxy curing agent and anacardic acid type waterborne epoxy curing agent as curing agents, and selecting a waterborne silane coupling agent as a special crosslinking assistant, wherein the component A and the component B can better react in the paint preparation process, and have unique viscosity, and the obtained paint film is compact and has excellent corrosion-resistant and rust-resistant properties. The two-component epoxy coating prepared by the invention has the advantages of high construction solid content design, short whole construction period, direct wet-on-wet operation with a matched coating, suitability for continuous OEM production, wide construction operation range, suitability for operation in a construction environment with the ambient temperature of 8-40 ℃ and the ambient humidity of 20-90% RH, suitability for high-pressure airless spraying, air spraying, mixed gas spraying and electrostatic spraying, excellent flash rust prevention capability and corrosion prevention capability (salt spray resistance over 800 hours), and good application prospect.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An environment-friendly two-component epoxy coating, which is prepared from the following components in parts by weight of 6:1, component A and component B;
the component A comprises the following components in parts by weight:
460g of waterborne epoxy resin, 180g of special functional waterborne polyurethane resin, 12g of rheological additive, 8g of defoaming agent, 36g of film-forming additive, 6g of flash rust inhibitor, 20g of wetting dispersant, 6g of base material wetting agent, 100g of anticorrosive pigment, 190g of pigment, 150g of filler, 30g of cosolvent and 150g of deionized water.
The component B comprises the following components in parts by weight:
190g of polyamide type waterborne epoxy curing agent, 320g of cashew acid type waterborne epoxy curing agent, 30g of functional additive, 30g of film-forming additive and 380g of deionized water.
Wherein the water-based epoxy resin consists of bisphenol A type water-based epoxy resin and bisphenol F type water-based epoxy resin in a weight ratio of 0.6: 1; the special functional waterborne polyurethane resin is epoxy modified waterborne polyurethane resin; the pigment is an inorganic pigment; the filler is a mixture of silicon micropowder and iron oxide red; the substrate wetting agent is an organic silicon wetting agent, so that the wettability of the substrate and the flowing and leveling performance of the coating system are improved; the cosolvent is dipropylene glycol butyl ether, so that the VOC content in the coating system is reduced; the defoaming agent is foam-breaking siloxane solution; the anticorrosive pigment consists of zinc phosphate and aluminum tripolyphosphate in a weight ratio of 1: 0.3; the functional assistant is a water-based silane coupling agent. The remaining components are commercially available.
The preparation method comprises the following steps:
s1, adding a cosolvent into deionized water, uniformly stirring at a low speed, sequentially adding a wetting dispersant, a pigment and an anticorrosive pigment under a stirring state, stirring and mixing for 30-45min, and grinding to obtain a mixed material; wherein, the grinding fineness is less than or equal to 20 μm;
s2, adding the mixed material into the water-based epoxy resin and the special functional polyurethane resin under the stirring state, stirring for 10-15min, then sequentially adding the film-forming aid, the flash rust inhibitor, the defoaming agent, the base material wetting and leveling agent and the filler, stirring and mixing for 10-15min, then adding the rheological aid into the mixture, and stirring uniformly to obtain a component A;
s3, adding the polyamide type waterborne epoxy curing agent, the cardanol type waterborne epoxy curing agent, the functional assistant and the film forming assistant into deionized water, and stirring uniformly to obtain a component B;
and S4, when in use, the component A and the component B are fully and uniformly mixed according to the proportion, and then construction can be carried out.
Example 2
An environment-friendly two-component epoxy coating, which is prepared from the following components in parts by weight: 1, component A and component B;
the component A comprises the following components in parts by weight:
420g of waterborne epoxy resin, 210g of special functional waterborne polyurethane resin, 18g of rheological additive, 10g of defoaming agent, 42g of film-forming additive, 10g of flash rust inhibitor, 50g of wetting dispersant, 8g of base material wetting agent, 240g of anticorrosive pigment, 210g of pigment, 250g of filler, 16g of cosolvent and 90g of deionized water.
The component B comprises the following components in parts by weight:
250g of polyamide type waterborne epoxy curing agent, 260g of cashew acid type waterborne epoxy curing agent, 50g of functional additive, 80g of film-forming additive and 420g of deionized water.
Wherein the water-based epoxy resin consists of bisphenol A type water-based epoxy resin and bisphenol F type water-based epoxy resin in a weight ratio of 0.9: 1; the filler is a mixture of wollastonite, barium sulfate and zinc phosphate; the cosolvent is propylene glycol butyl ether, and the defoaming agent is an emulsion of oxidized polyether; the anti-corrosive pigment consists of zinc phosphate and aluminum tripolyphosphate in a weight ratio of 1: 0.5. The remaining components were the same as in example 1.
The preparation process is referred to example 1.
Example 3
An environment-friendly two-component epoxy coating, which is prepared from the following components in parts by weight of 8: 1, component A and component B;
the component A comprises the following components in parts by weight:
350g of waterborne epoxy resin, 250g of special functional waterborne polyurethane resin, 20g of rheological additive, 5g of defoaming agent, 50g of film-forming additive, 8g of flash rust inhibitor, 40g of wetting dispersant, 5g of base material wetting agent, 300g of anticorrosive pigment, 150g of pigment, 180g of filler, 8g of cosolvent and 50g of deionized water.
The component B comprises the following components in parts by weight:
210g of polyamide type waterborne epoxy curing agent, 200g of cashew acid type waterborne epoxy curing agent, 40g of functional additive, 60g of film-forming additive and 450g of deionized water.
Wherein the water-based epoxy resin consists of bisphenol A type water-based epoxy resin and bisphenol F type water-based epoxy resin in a weight ratio of 1: 1; the filler is zinc phosphate; the cosolvent is dipropylene glycol butyl ether, and the defoaming agent is foam-breaking polysiloxane; the anti-corrosion pigment consists of zinc phosphate and aluminum tripolyphosphate in a weight ratio of 1: 1. The remaining components were the same as in example 1.
The preparation process is referred to example 1.
Example 4
An environment-friendly two-component epoxy coating, which is prepared from the following components in parts by weight of 5:1, component A and component B;
the component A comprises the following components in parts by weight:
500g of waterborne epoxy resin, 150g of special functional waterborne polyurethane resin, 5g of rheological additive, 5g of defoaming agent, 30g of film-forming additive, 2g of flash rust inhibitor, 30g of wetting dispersant, 10g of base material wetting agent, 120g of anticorrosive pigment, 250g of pigment, 210g of filler, 24g of cosolvent and 120g of deionized water.
The component B comprises the following components in parts by weight:
150g of polyamide type waterborne epoxy curing agent, 350g of cashew acid type waterborne epoxy curing agent, 10g of functional additive, 50g of film-forming additive and 300g of deionized water.
Wherein the water-based epoxy resin consists of bisphenol A type water-based epoxy resin and bisphenol F type water-based epoxy resin in a weight ratio of 1.25: 1; the filler is talcum powder; the cosolvent is propylene glycol butyl ether, and the defoaming agent is a foam-breaking siloxane solution; the anti-corrosion pigment consists of zinc phosphate and aluminum tripolyphosphate in a weight ratio of 1: 3. The remaining components were the same as in example 1.
The preparation process is referred to example 1.
Test examples
To better illustrate the characteristics of the environmentally friendly two-component epoxy coating provided by the embodiment of the present invention, the environmentally friendly two-component epoxy coatings prepared in examples 1 to 4 were tested for their corresponding properties and compared with comparative examples, as shown in table 1, wherein comparative example 1 is a market-oriented conventional waterborne epoxy primer-surfacer product, and comparative example 2 is a market-oriented conventional waterborne polyurethane product.
As can be seen from the data in Table 1, the two-component epoxy coating prepared in the embodiment of the invention has the advantages of high drying speed, wide construction operation range, suitability for operation in a construction environment with the ambient temperature of 8-40 ℃ and the ambient humidity of 20-90% RH, and excellent water resistance, wear resistance, acid and alkali resistance and salt spray resistance.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the invention and are not intended to be limiting. For a person skilled in the art to which the invention pertains, several simple deductions, modifications or substitutions may be made according to the idea of the invention.
Claims (7)
1. The environment-friendly two-component epoxy coating is characterized by comprising the following components in parts by weight (5-8): 1, component A and component B;
the component A comprises the following components in parts by weight:
35-50 parts of waterborne epoxy resin, 15-25 parts of special functional waterborne polyurethane resin, 0.5-2 parts of rheological additive, 0.5-1 part of defoaming agent, 3-5 parts of film-forming additive, 0.2-1 part of anti-flash rust agent, 2-5 parts of wetting dispersant, 0.5-1 part of base material wetting agent, 10-30 parts of anticorrosive pigment, 15-25 parts of filler, 0-3 parts of cosolvent and 5-15 parts of deionized water;
the component B comprises the following components in parts by weight:
15-25 parts of polyamide type waterborne epoxy curing agent, 20-35 parts of cardanol type waterborne epoxy curing agent, 1-5 parts of functional additive, 3-8 parts of film forming additive and 30-45 parts of deionized water.
2. The environmentally friendly two-component epoxy coating of claim 1, wherein the waterborne epoxy resin is composed of a bisphenol A waterborne epoxy resin and a bisphenol F waterborne epoxy resin in a weight ratio of (0.6-1.25): 1.
3. The environment-friendly two-component epoxy coating according to claim 1 or 2, wherein the special functional aqueous polyurethane resin is an epoxy-modified aqueous polyurethane resin.
4. The environment-friendly two-component epoxy coating as claimed in claim 1, wherein the anticorrosive pigment is composed of zinc phosphate and aluminum tripolyphosphate in a weight ratio of 1 (0.3-3).
5. The environment-friendly two-component epoxy coating material according to claim 1, wherein the functional additive is an aqueous silane coupling agent.
6. The method for preparing the environment-friendly two-component epoxy coating according to claim 1, comprising the steps of:
s1, adding a cosolvent into deionized water, uniformly stirring at a low speed, sequentially adding a wetting dispersant, a pigment and an anticorrosive pigment under a stirring state, stirring and mixing for 30-45min, and grinding to obtain a mixed material;
s2, adding the mixed material into the water-based epoxy resin and the special functional polyurethane resin under the stirring state, stirring for 10-15min, then sequentially adding the film-forming aid, the flash rust inhibitor, the defoaming agent, the base material wetting and leveling agent and the filler, stirring and mixing for 10-15min, then adding the rheological aid into the mixture, and stirring uniformly to obtain a component A;
s3, sequentially adding a polyamide type waterborne epoxy curing agent, a cardanol type waterborne epoxy curing agent, a functional assistant and a film forming assistant into deionized water, and uniformly stirring to obtain a component B;
and S4, when in use, the component A and the component B are fully and uniformly mixed according to the proportion, and then construction can be carried out.
7. The method for preparing environment-friendly two-component epoxy paint as claimed in claim 6, wherein in the step S1, the grinding fineness is less than or equal to 20 μm.
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| CN201911118477.9A CN112300656A (en) | 2019-11-15 | 2019-11-15 | Environment-friendly two-component epoxy coating and preparation method thereof |
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| CN201911118477.9A CN112300656A (en) | 2019-11-15 | 2019-11-15 | Environment-friendly two-component epoxy coating and preparation method thereof |
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| CN112300656A true CN112300656A (en) | 2021-02-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116004084A (en) * | 2023-01-04 | 2023-04-25 | 江苏德威涂料有限公司 | Water-based epoxy primer and preparation method and application thereof |
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| CN116004084A (en) * | 2023-01-04 | 2023-04-25 | 江苏德威涂料有限公司 | Water-based epoxy primer and preparation method and application thereof |
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