CN110982387B - Water-based epoxy coating with good adhesive force and corrosion resistance on surface of metal substrate and preparation method thereof - Google Patents

Water-based epoxy coating with good adhesive force and corrosion resistance on surface of metal substrate and preparation method thereof Download PDF

Info

Publication number
CN110982387B
CN110982387B CN201911386552.XA CN201911386552A CN110982387B CN 110982387 B CN110982387 B CN 110982387B CN 201911386552 A CN201911386552 A CN 201911386552A CN 110982387 B CN110982387 B CN 110982387B
Authority
CN
China
Prior art keywords
parts
water
coating
metal substrate
corrosion resistance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201911386552.XA
Other languages
Chinese (zh)
Other versions
CN110982387A (en
Inventor
施林生
陈增红
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Changzhou Hualing New Material Co ltd
Original Assignee
Changzhou Hualing New Material Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Changzhou Hualing New Material Co ltd filed Critical Changzhou Hualing New Material Co ltd
Priority to CN201911386552.XA priority Critical patent/CN110982387B/en
Publication of CN110982387A publication Critical patent/CN110982387A/en
Application granted granted Critical
Publication of CN110982387B publication Critical patent/CN110982387B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D163/00Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D5/00Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08Anti-corrosive paints
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/20Diluents or solvents
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/61Additives non-macromolecular inorganic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09DCOATING 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
    • C09D7/00Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40Additives
    • C09D7/60Additives non-macromolecular
    • C09D7/63Additives non-macromolecular organic
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/18Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20Oxides; Hydroxides
    • C08K3/22Oxides; Hydroxides of metals
    • C08K2003/2227Oxides; Hydroxides of metals of aluminium
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/02Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025Polymer 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
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/03Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035Polymer 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 a water-based epoxy coating with good adhesive force and corrosion resistance on the surface of a metal substrate and a preparation method thereof, and the technical key points are as follows: the raw materials comprise the following components in parts by weight: 30-40 parts of water-based epoxy resin, 0-5 parts of epoxy resin, 15-20 parts of deionized water, 1-3 parts of water-based dispersant BYK1901, 0.1-0.5 part of defoaming agent, 0-1 part of organosilicon coupling agent, 6-12 parts of tartaric acid, 5-9 parts of EDTA disodium, 10-30 parts of titanium dioxide, 10-30 parts of talcum powder, 5-10 parts of precipitated barium sulfate, 5-10 parts of zinc phosphate, 0.3-1 part of wetting agent, 0.5-1 part of thickening agent, 9-12 parts of modified amine resin and 1-4 parts of alcohol ether cosolvent. The paint of the invention can be firmly attached to the surface of a metal substrate, the corrosion resistance of the metal substrate is improved, and the preparation method is simple.

Description

Water-based epoxy coating with good adhesive force and corrosion resistance on surface of metal substrate and preparation method thereof
Technical Field
The invention relates to the field of surface coatings of metal substrates, in particular to a water-based epoxy coating with good adhesion and corrosion resistance on the surface of a metal substrate and a preparation method thereof.
Background
The metal aluminum (aluminum alloy) has a smaller specific gravity than iron, is soft and easy to process, and has wide application in replacing iron, such as light weight of a truck, and has high economic value when aluminum is used for replacing iron.
The traditional aluminum (aluminum alloy) surface protection is generally carried out through passivation, so that a layer of very dense aluminum oxide is formed on the aluminum surface, and the aluminum (aluminum alloy) surface protection plays a strong role in protecting the aluminum in the atmospheric environment, but chemical substances such as hydrogen fluoride (fluoride salt) and dichromate are used in the processes, and the chemical substances are easy to cause diseases on teeth and bones of human beings and animals. And the aluminum passivation forms compact alumina on the surface, which has stronger corrosion resistance in the common atmospheric environment, but the compact alumina is easy to be chemically dissolved in the chemical substance environments of acid, alkali, salt and the like, so that the corrosion is accelerated, and larger economic loss is caused, therefore, better protection is provided by the coating in a more serious corrosion environment.
The Chinese patent with the prior application publication number of CN104017401A discloses an anticorrosive paint for aluminum plates, which comprises the following components in parts by weight: 100-150 parts of epoxy resin, 15-20 parts of amino resin, 10-15 parts of modified bisphenol epoxy resin, 15-20 parts of novolac epoxy resin, 4-5 parts of zinc oxide thin sheet, 35-40 parts of vinyl chloride, 4-8 parts of kaolin, 5-20 parts of nano aluminum powder, 2-6 parts of zirconium quartz and 5-15 parts of nano aluminum oxide; 2-10 parts of silicon carbide and 5-20 parts of porcelain powder; 0-5 parts of dispersing agent and 5-20 parts of mixed organic solvent.
However, the above patent has the following problems: firstly, the solvent-based coating has high VOC volatilization and large energy consumption; moreover, because the texture of the metal aluminum is , the component structure is complicated, the adhesion of the traditional solvent-based epoxy coating to the surfaces is poor, and the coating film is easy to displace or even fall off on the metal surface along with the fatigue damage of the metal, so that the protection effect is lost.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the water-based epoxy coating with good adhesive force and corrosion resistance on the surface of the metal substrate and the preparation method thereof, the water-based epoxy coating can be firmly attached on the surface of the metal substrate, the corrosion resistance of the metal substrate is improved, and the preparation method is simple.
In order to achieve the purpose, the invention provides the following technical scheme:
the water-based epoxy coating with good adhesive force and corrosion resistance on the surface of a metal substrate comprises the following raw materials in parts by weight: 30-40 parts of water-based epoxy resin, 0-5 parts of epoxy resin, 15-20 parts of deionized water, 1-3 parts of water-based dispersant BYK1901, 0.1-0.5 part of defoaming agent, 0-1 part of organosilicon coupling agent, 6-12 parts of tartaric acid, 5-9 parts of EDTA disodium, 10-30 parts of titanium dioxide, 10-30 parts of talcum powder, 5-10 parts of precipitated barium sulfate, 5-10 parts of zinc phosphate, 0.3-1 part of wetting agent, 0.5-1 part of thickening agent, 9-12 parts of modified amine resin and 1-4 parts of alcohol ether cosolvent.
By adopting the technical scheme, the waterborne epoxy resin is a high polymer material with excellent corrosion resistance, and can meet the basic corrosion resistance requirement on metal substrates; the modified amine resin is used as a curing agent of the waterborne epoxy resin and can generate a cross-linking reaction with the waterborne epoxy resin to form a block, so that the waterborne epoxy resin and the modified amine resin are added, an epoxy functional group and the amine react to form a high molecular structure, the expansion coefficients of the coating and the metal to be sprayed are close to or the same, and a coating film with good adhesive force and flexibility can be formed on the surface of the aluminum;
meanwhile, as a water-based paint, deionized water is used as a solvent, so that the water-based paint is low in volatility and more environment-friendly, and a water-based dispersant BYK190 and a wetting agent are added, so that all components in a paint system can be fully and uniformly mixed; according to the invention, the talcum powder, the precipitated barium sulfate and the zinc phosphate are added to serve as aggregates in the coating system, so that the drying speed of the coating is improved, the dried coating can be supported, the dried coating is stable in shape, the cracking problem of the coating is reduced, smaller talcum powder particles are embedded among particles of the precipitated barium sulfate, the structural compactness of the coating system is improved, the oil absorption rate of the talcum powder is low, the oil absorption rate of the precipitated barium sulfate is high, and the talcum powder, the precipitated barium sulfate and the zinc phosphate are matched with each other and cooperate with the thickening agent and the defoaming agent to adjust the viscosity and the popularity of the coating; the addition of the organosilicon coupling agent can also improve the mixing uniformity of all components in a coating system, improve the adhesion and the corrosion resistance of the coating, and shorten the drying time of the coating by the curing action of the organosilicon coupling agent; the alcohol ether cosolvent promotes the components to be dissolved in the deionized water solvent; the addition of the titanium dioxide utilizes the excellent covering property of the titanium dioxide to adjust the primary color of the coating to be white, so that the later-stage coloring of the coating is facilitated;
in addition, tartaric acid and disodium EDTA are added, because the aluminum oxide on the surface of the aluminum plate is an amphoteric oxide and the tartaric acid is acidic, the tartaric acid can react with the aluminum oxide as an organic acid to improve the bonding property between the coating and the aluminum plate by utilizing the formation of chemical bonds, and the disodium EDTA is an excellent complexing agent and can be complexed with aluminum ions obtained by reaction, so that the combination between the aluminum plate and the coating can be greatly improved, and the coating can be firmly attached to the surface of a metal substrate to improve the corrosion resistance of the metal substrate.
The invention is further provided that the thickener comprises the following components in parts by weight: 15-26 parts of sodium alginate and 8-16 parts of calcium chloride.
By adopting the technical scheme, the sodium alginate is a water-soluble substance and can be well dispersed in a coating system, meanwhile, the sodium alginate has a viscosity and can be well used as a thickening agent to improve the viscosity of the coating and modify the fluid state of the coating, and the sodium alginate is also a metal complexing agent and can be complexed with aluminum ions to further improve the binding property of the coating and an aluminum plate; and calcium chloride mainly improves calcium ions, so that sodium ions and calcium ions are subjected to ion exchange reaction to form a cross-linked network structure, thereby forming hydrogel and further improving the bonding strength between the aluminum plate and the coating.
The invention further provides that the epoxy value of the water-based epoxy resin is 0.19-0.21mol/g, and the epoxy value of the epoxy resin is 0.4-0.6 mol/g.
By adopting the technical scheme, with the increase of the epoxy value, the molecular chains of the water-based epoxy resin and the epoxy resin are shortened, the viscosity of the water-based epoxy resin and the viscosity of the epoxy resin are reduced, and the epoxy value of the water-based epoxy resin and the epoxy resin is limited, so that the water-based epoxy resin and the epoxy resin have proper viscosity and fluidity, and the service performance of the coating is improved.
The invention is further provided with 6-13 parts of KP-1 daub and 3-6 parts of calcium stearoyl lactylate.
By adopting the technical scheme, the KP-1 daub is a novel anticorrosive material formed by combining various acid-resistant materials by taking potassium water glass as an adhesive, phosphate as a curing agent and potassium water glass as a curing agent, has excellent acid corrosion resistance, can buffer the influence of tartaric acid on a coating while improving the corrosion resistance of an aluminum plate, has good bonding performance and can improve the bonding strength between the aluminum plate and the coating; the calcium stearoyl lactylate is added to serve as an excellent anionic emulsifier, so that the emulsification of KP-1 daub can be promoted, the KP-1 daub is uniformly dispersed in a coating system, the local agglomeration of the coating system caused by the excessive viscosity of the KP-1 daub is avoided, the calcium stearoyl lactylate also has good anti-aging performance, and the service life of the coating can be prolonged.
The invention is further provided that the defoaming agent comprises the following components in parts by weight: 9-15 parts of emulsified silicone oil and 10-16 parts of polyoxyethylene polyoxypropylene amine ether.
By adopting the technical scheme, the emulsified silicone oil has good lubricity and low surface tension, so that a defoaming effect can be well achieved, and the emulsified silicone oil has no corrosivity on metal, so that the damage of the coating to an aluminum plate can be reduced; the polyoxyethylene polyoxypropylene amine ether is a non-volatile oily liquid, is volatile, safe and environment-friendly, has a strong defoaming effect, and can be used for defoaming a coating system well.
The invention is further provided that the wetting agent comprises the following components in parts by weight: 8-12 parts of pentaerythritol and 10-15 parts of sulfonated oil.
By adopting the technical scheme, the pentaerythritol has a large amount of hydrophilic hydroxyl groups, so that a wetting effect can be well achieved, and the pentaerythritol can improve the hardness, the gloss and the durability of a coating film and improve the service performance of the coating; the sulfonated oil is used as an anionic surfactant and has good wetting, emulsifying, dispersing, lubricating and other effects, so that the dissolution and mixing of various components in a coating system can be further improved.
The invention is further provided that the raw materials comprise the following components in parts by weight: 36 parts of water-based epoxy resin with the epoxy value of 0.2mol/g, 2 parts of epoxy resin with the epoxy value of 0.45mol/g, 18 parts of deionized water, 1901 parts of water-based dispersant BYK, 0.2 part of defoaming agent, 0.2 part of organic silicon coupling agent, 10 parts of tartaric acid, 8 parts of EDTA disodium, 16 parts of titanium dioxide, 21 parts of talcum powder, 8 parts of precipitated barium sulfate, 6 parts of zinc phosphate, 0.6 part of wetting agent, 0.4 part of thickening agent, 10 parts of modified amine resin, 2 parts of alcohol ether cosolvent, 11 parts of KP-1 cement and 5 parts of calcium stearoyl lactate.
By adopting the technical scheme, the components in the coating system are further refined, so that the time ratio of the components can be optimized, and the bonding property and the corrosion resistance of the coating are improved.
The invention also aims to provide a preparation method of the water-based epoxy coating with good adhesion and corrosion resistance on the surface of the metal substrate, which comprises the following steps:
s1: grinding talcum powder, precipitated barium sulfate, zinc phosphate and titanium dioxide to particles of 100 +/-10 meshes;
s2: stirring the water-based epoxy resin, the deionized water, the water-based dispersant BYK190 and the defoaming agent at the rotating speed of 400 +/-30 revolutions per minute for 30 +/-3 min;
s3: adding an organic silicon coupling agent, ground titanium dioxide, ground talcum powder, ground precipitated barium sulfate, ground zinc phosphate, a wetting agent, a thickening agent, modified amine resin and an alcohol ether cosolvent into the mixture in S2, continuously stirring for 15 +/-2 min, finally adding tartaric acid and EDTA disodium, and continuously stirring for 20 +/-3 min to obtain a crude coating;
s4: and (4) sieving the crude coating by using a coating filter sieve with a sieve of 300 +/-25 meshes to obtain a final product.
By adopting the technical scheme, the components in the coating system can be uniformly mixed by pre-grinding the talcum powder, the precipitated barium sulfate, the zinc phosphate and the titanium dioxide and mixing and stirring the components at a high speed, and after the crude coating is prepared, the product is obtained by filtering the crude coating, so that the coating disclosed by the invention is more delicate in texture, the drying speed is improved, and the bonding strength between the coating and an aluminum plate is enhanced.
In conclusion, the invention has the following beneficial effects:
1. the water-based paint prepared by adopting the water-based base material has small volatility and is more energy-saving and environment-friendly;
2. in the invention, the KP-1 cement calcium stearoyl lactylate is added, and the KP-1 cement is uniformly dispersed in a coating system by using the emulsification effect of the stearoyl lactylate, so that the adhesion and the corrosion resistance of the coating can be further improved by the KP-1 cement;
3. in the invention, tartaric acid and EDTA disodium are added, tartaric acid is reacted with aluminum oxide to improve the bonding property between the coating and the aluminum plate, and EDTA disodium can be complexed with aluminum ions obtained by the reaction, so that the combination between the aluminum plate and the coating can be greatly improved, and the coating can be firmly attached to the surface of a metal substrate to improve the corrosion resistance of the metal substrate.
Detailed Description
The present invention will be described in further detail with reference to examples.
The first embodiment is as follows:
the water-based epoxy coating with good adhesive force and corrosion resistance on the surface of a metal substrate comprises the following raw materials in parts by weight:
30 parts of water-based epoxy resin with the epoxy value of 0.19mol/g,
2 parts of epoxy resin with the epoxy value of 0.41mol/g,
15 parts of deionized water, 1901 parts of a water-based dispersant BYK1901 part, 0.2 part of a defoaming agent, 0.1 part of an organic silicon coupling agent (chenguang 560), 6 parts of tartaric acid, 5 parts of EDTA disodium, 10 parts of titanium dioxide, 10 parts of talcum powder, 5 parts of precipitated barium sulfate, 5 parts of zinc phosphate, 0.3 part of a wetting agent, 0.6 part of a thickening agent, 10 parts of modified amine resin (Vast EPIKURE6870-W-53 in the United states), 2 parts of an alcohol ether cosolvent (ethylene glycol), 8 parts of KP-1 cement and 4 parts of stearoyl calcium lactate.
Wherein:
the thickening agent comprises the following components in parts by weight: 15 parts of sodium alginate and 10 parts of calcium chloride;
the defoaming agent comprises the following components in parts by weight: 9 parts of emulsified silicone oil and 10 parts of polyoxyethylene polyoxypropylene amine ether;
the wetting agent comprises the following components in parts by weight: 10 parts of pentaerythritol and 12 parts of sulfonated oil.
Example two:
the water-based epoxy coating with good adhesive force and corrosion resistance on the surface of a metal substrate comprises the following raw materials in parts by weight:
35 parts of water-based epoxy resin with the epoxy value of 0.21mol/g,
18 parts of deionized water, 1902 parts of a water-based dispersant BYK, 0.3 part of a defoaming agent, 0.5 part of an organic silicon coupling agent (chenguang 560), 6-12 parts of tartaric acid, 6 parts of EDTA disodium, 15 parts of titanium dioxide, 15 parts of talcum powder, 7 parts of precipitated barium sulfate, 6 parts of zinc phosphate, 0.5 part of a wetting agent, 0.5 part of a thickening agent, 9 parts of modified amine resin (Vast Epikure6870-W-53), 1 part of an alcohol ether cosolvent (ethylene glycol), 6 parts of KP-1 cement and 3 parts of calcium stearoyl lactate.
Wherein:
the thickening agent comprises the following components in parts by weight: 18 parts of sodium alginate and 8 parts of calcium chloride;
the defoaming agent comprises the following components in parts by weight: 11 parts of emulsified silicone oil and 12 parts of polyoxyethylene polyoxypropylene amine ether;
the wetting agent comprises the following components in parts by weight: 8 parts of pentaerythritol and 10 parts of sulfonated oil.
Example three:
the water-based epoxy coating with good adhesive force and corrosion resistance on the surface of a metal substrate comprises the following raw materials in parts by weight:
38 parts of water-based epoxy resin with the epoxy value of 0.21mol/g,
3 parts of epoxy resin with the epoxy value of 0.5mol/g,
18 parts of deionized water, 1903 parts of a water-based dispersant BYK, 0.4 part of a defoaming agent, 0.8 part of an organic silicon coupling agent (chenguang 560), 11 parts of tartaric acid, 8 parts of EDTA disodium, 20 parts of titanium dioxide, 19 parts of talcum powder, 7 parts of precipitated barium sulfate, 7 parts of zinc phosphate, 0.6 part of a wetting agent, 0.7 part of a thickening agent, 11 parts of modified amine resin (Vast EPIKURE6870-W-53 in the United states), 3 parts of an alcohol ether cosolvent (ethylene glycol), 10 parts of KP-1 cement and 5 parts of stearoyl calcium lactate.
Wherein:
the thickening agent comprises the following components in parts by weight: 20 parts of sodium alginate and 12 parts of calcium chloride;
the defoaming agent comprises the following components in parts by weight: 13 parts of emulsified silicone oil and 14 parts of polyoxyethylene polyoxypropylene amine ether; the wetting agent comprises the following components in parts by weight: 11 parts of pentaerythritol and 15 parts of sulfonated oil.
Example four:
the water-based epoxy coating with good adhesive force and corrosion resistance on the surface of a metal substrate comprises the following raw materials in parts by weight:
36 parts of water-based epoxy resin with the epoxy value of 0.2mol/g,
2 parts of epoxy resin with the epoxy value of 0.45mol/g,
18 parts of deionized water, 1901 parts of a water-based dispersant BYK, 0.2 parts of a defoaming agent, 0.2 parts of an organic silicon coupling agent (chenguang 560), 10 parts of tartaric acid, 8 parts of EDTA disodium, 16 parts of titanium dioxide, 21 parts of talcum powder, 8 parts of precipitated barium sulfate, 6 parts of zinc phosphate, 0.6 part of a wetting agent, 0.4 part of a thickening agent, 10 parts of modified amine resin (Vast EPIKURE6870-W-53 in the United states), 2 parts of an alcohol ether cosolvent (ethylene glycol), 11 parts of KP-1 cement and 5 parts of stearoyl calcium lactate.
Wherein:
the thickening agent comprises the following components in parts by weight: 26 parts of sodium alginate and 14 parts of calcium chloride;
the defoaming agent comprises the following components in parts by weight: 14 parts of emulsified silicone oil and 16 parts of polyoxyethylene polyoxypropylene amine ether;
the wetting agent comprises the following components in parts by weight: 12 parts of pentaerythritol and 14 parts of sulfonated oil.
Example five:
the water-based epoxy coating with good adhesive force and corrosion resistance on the surface of a metal substrate comprises the following raw materials in parts by weight:
40 parts of water-based epoxy resin with the epoxy value of 0.21mol/g,
5 parts of epoxy resin with the epoxy value of 0.6mol/g,
20 parts of deionized water, 1903 parts of a water-based dispersant BYK, 0.5 part of a defoaming agent, 1 part of an organic silicon coupling agent (chenguang 560), 12 parts of tartaric acid, 9 parts of EDTA disodium, 30 parts of titanium dioxide, 30 parts of talcum powder, 10 parts of precipitated barium sulfate, 10 parts of zinc phosphate, 1 part of a wetting agent, 1 part of a thickening agent, 12 parts of modified amine resin (American Hansen EPIKURE6870-W-53), 4 parts of an alcohol ether cosolvent (ethylene glycol), 13 parts of KP-1 cement and 6 parts of calcium stearoyl lactate.
Wherein:
the thickening agent comprises the following components in parts by weight: 24 parts of sodium alginate and 16 parts of calcium chloride;
the defoaming agent comprises the following components in parts by weight: 15 parts of emulsified silicone oil and 14 parts of polyoxyethylene polyoxypropylene amine ether;
the wetting agent comprises the following components in parts by weight: 10 parts of pentaerythritol and 15 parts of sulfonated oil.
Example six:
a preparation method of a water-based epoxy coating with good adhesive force and corrosion resistance on the surface of a metal substrate is characterized by comprising the following steps:
s1: grinding talcum powder, precipitated barium sulfate, zinc phosphate and titanium dioxide to particles of 100 +/-10 meshes (preferably 100);
s2: stirring the water-based epoxy resin, the epoxy resin, deionized water, the water-based dispersant BYK190 and the defoaming agent at the rotating speed of 400 +/-30 revolutions per minute (preferably 420) for 30 +/-3 min (preferably 32);
s3: adding an organic silicon coupling agent, ground titanium dioxide, ground talcum powder, ground precipitated barium sulfate, ground zinc phosphate, a wetting agent, a thickening agent, modified amine resin and an alcohol ether cosolvent into the mixture in the S2, continuously stirring for 15 +/-2 min (preferably 16), finally adding tartaric acid and EDTA disodium, and continuously stirring for 20 +/-3 min (preferably 22) to obtain a crude coating;
s4: the crude dope is passed through a 300 + -25 mesh (preferably 325 mesh) screen using a dope filter screen to obtain the final product.
Comparative example one:
compared with the first embodiment, KP-1 daub and calcium stearoyl lactylate are not added.
Comparative example two:
in contrast to example one, no tartaric acid was added.
Comparative example three:
in contrast to example one, no tartaric acid and disodium EDTA were added.
Comparative example four:
in contrast to example one, no modified amine resin was added.
Comparative example five:
in contrast to example one, no talc and precipitated barium sulfate was added.
And (3) performance detection:
according to the component proportions of the first to fifth examples and the first to fifth comparative examples, the paint sample is prepared according to the preparation method of the sixth example, the paint is coated on an aluminum plate, the adhesion of the paint is detected according to GB/T9286-1988, and the corrosion resistance is detected on the basis.
TABLE 1
TABLE 2
According to the detection structure, the proper proportion of the modified amine resin and the waterborne epoxy resin can ensure that the expansion coefficients of the coating and the metal to be sprayed are close to or the same, so that the adhesive force of the coating is improved; meanwhile, the adhesive force of the coating can be improved due to the interaction of the talcum powder and the precipitated barium sulfate; the interaction of tartaric acid and EDTA disodium can greatly improve the combination between the aluminum plate and the coating; KP-1 daub and calcium stearoyl lactylate are added, so that the adhesive force and the corrosion resistance of the coating can be improved; therefore, the coating can be firmly attached to the surface of the metal substrate, and the corrosion resistance of the metal substrate is improved.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.

Claims (6)

1. The water-based epoxy coating with good adhesive force and corrosion resistance on the surface of a metal substrate is characterized by comprising the following raw materials in parts by weight: 30-40 parts of water-based epoxy resin, 0-5 parts of epoxy resin, 15-20 parts of deionized water, 1-3 parts of water-based dispersant BYK190, 0.1-0.5 part of defoaming agent, 0-1 part of organosilicon coupling agent, 6-12 parts of tartaric acid, 5-9 parts of EDTA disodium, 10-30 parts of titanium dioxide, 10-30 parts of talcum powder, 5-10 parts of precipitated barium sulfate, 5-10 parts of zinc phosphate, 0.3-1 part of wetting agent, 0.5-1 part of thickening agent, 9-12 parts of modified amine resin, 1-4 parts of alcohol ether cosolvent, 6-13 parts of KP-1 cement and 3-6 parts of calcium stearoyl lactate; the epoxy value of the waterborne epoxy resin is 0.19-0.21mol/g, and the epoxy value of the epoxy resin is 0.4-0.6 mol/g.
2. The water-based epoxy coating with good adhesion and corrosion resistance on the surface of a metal substrate according to claim 1, wherein: the thickening agent comprises the following components in parts by weight: 15-26 parts of sodium alginate and 8-16 parts of calcium chloride.
3. The water-based epoxy coating with good adhesion and corrosion resistance on the surface of a metal substrate according to claim 1, wherein: the defoaming agent comprises the following components in parts by weight: 9-15 parts of emulsified silicone oil and 10-16 parts of polyoxyethylene polyoxypropylene amine ether.
4. The water-based epoxy coating with good adhesion and corrosion resistance on the surface of a metal substrate according to claim 1, wherein: the wetting agent comprises the following components in parts by weight: 8-12 parts of pentaerythritol and 10-15 parts of sulfonated oil.
5. The water-based epoxy coating with good adhesion and corrosion resistance on the surface of a metal substrate according to claim 1, which comprises the following raw materials in parts by weight: 36 parts of water-based epoxy resin with the epoxy value of 0.2mol/g, 2 parts of epoxy resin with the epoxy value of 0.45mol/g, 18 parts of deionized water, 1901 parts of water-based dispersant BYK, 0.2 part of defoaming agent, 0.2 part of organic silicon coupling agent, 10 parts of tartaric acid, 8 parts of EDTA disodium, 16 parts of titanium dioxide, 21 parts of talcum powder, 8 parts of precipitated barium sulfate, 6 parts of zinc phosphate, 0.6 part of wetting agent, 0.4 part of thickening agent, 10 parts of modified amine resin, 2 parts of alcohol ether cosolvent, 11 parts of KP-1 cement and 5 parts of calcium stearoyl lactate.
6. The method for preparing the water-based epoxy coating with good adhesion and corrosion resistance on the surface of the metal substrate according to any one of claims 1 to 5, characterized by comprising the following steps:
s1: grinding talcum powder, precipitated barium sulfate, zinc phosphate and titanium dioxide to particles of 100 +/-10 meshes;
s2: stirring the water-based epoxy resin, the deionized water, the water-based dispersant BYK190 and the defoaming agent at the rotating speed of 400 +/-30 revolutions per minute for 30 +/-3 min;
s3: adding an organic silicon coupling agent, ground titanium dioxide, ground talcum powder, ground precipitated barium sulfate, ground zinc phosphate, a wetting agent, a thickening agent, modified amine resin and an alcohol ether cosolvent into the mixture in S2, continuously stirring for 15 +/-2 min, finally adding tartaric acid and EDTA disodium, and continuously stirring for 20 +/-3 min to obtain a crude coating;
s4: and (4) sieving the crude coating by using a coating filter sieve with a sieve of 300 +/-25 meshes to obtain a final product.
CN201911386552.XA 2019-12-27 2019-12-27 Water-based epoxy coating with good adhesive force and corrosion resistance on surface of metal substrate and preparation method thereof Active CN110982387B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911386552.XA CN110982387B (en) 2019-12-27 2019-12-27 Water-based epoxy coating with good adhesive force and corrosion resistance on surface of metal substrate and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911386552.XA CN110982387B (en) 2019-12-27 2019-12-27 Water-based epoxy coating with good adhesive force and corrosion resistance on surface of metal substrate and preparation method thereof

Publications (2)

Publication Number Publication Date
CN110982387A CN110982387A (en) 2020-04-10
CN110982387B true CN110982387B (en) 2021-08-20

Family

ID=70076761

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911386552.XA Active CN110982387B (en) 2019-12-27 2019-12-27 Water-based epoxy coating with good adhesive force and corrosion resistance on surface of metal substrate and preparation method thereof

Country Status (1)

Country Link
CN (1) CN110982387B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112625550B (en) * 2021-01-08 2022-05-13 福州大学 Cathode plate anticorrosive paint for wet smelting electrolytic zinc and preparation method thereof
CN113212016A (en) * 2021-06-07 2021-08-06 石家庄众旺彩印有限公司 Printing process of environment-friendly green paper product

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101050322A (en) * 2006-04-04 2007-10-10 联合工艺公司 Chromate free waterborne corrosion resistant primer with non-carcinogenic corrosion inhibiting additive
CN101708984A (en) * 2009-11-16 2010-05-19 灵宝市金源矿业有限责任公司 KP1 clay and preparation method and application thereof
JP2014169406A (en) * 2013-03-04 2014-09-18 Plaza Of Legacy:Kk Heavy-duty rust proofing primer
CN106366876A (en) * 2016-08-27 2017-02-01 安徽天瞳智能科技有限公司 Antibacterial, uvioresistant, heat-resisting and anticorrosion composite material
WO2018011103A1 (en) * 2016-07-13 2018-01-18 Akzo Nobel Coatings International B.V. Process for the manufacture of an epoxy-functional polyester, epoxy-functional polyester obtained by such process and coating composition comprising such epoxy-functional polyester
CN107652843A (en) * 2017-10-18 2018-02-02 哈尔滨金纳科技有限公司 A kind of preparation method of CNT composite graphite alkene anticorrosive paint
CN107964335A (en) * 2017-10-30 2018-04-27 合肥林邦门业有限公司 A kind of wood furniture extinguishing waterborn preparation method for coating
CN108546497A (en) * 2018-05-09 2018-09-18 常州市华菱新材料有限公司 A kind of self-drying type epoxy coating and preparation method thereof and application method
CN108840586A (en) * 2018-08-23 2018-11-20 天津大学 Ion response type gel and preparation method and application suitable for cement silicate self-healing system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101050322A (en) * 2006-04-04 2007-10-10 联合工艺公司 Chromate free waterborne corrosion resistant primer with non-carcinogenic corrosion inhibiting additive
CN101708984A (en) * 2009-11-16 2010-05-19 灵宝市金源矿业有限责任公司 KP1 clay and preparation method and application thereof
JP2014169406A (en) * 2013-03-04 2014-09-18 Plaza Of Legacy:Kk Heavy-duty rust proofing primer
WO2018011103A1 (en) * 2016-07-13 2018-01-18 Akzo Nobel Coatings International B.V. Process for the manufacture of an epoxy-functional polyester, epoxy-functional polyester obtained by such process and coating composition comprising such epoxy-functional polyester
CN106366876A (en) * 2016-08-27 2017-02-01 安徽天瞳智能科技有限公司 Antibacterial, uvioresistant, heat-resisting and anticorrosion composite material
CN107652843A (en) * 2017-10-18 2018-02-02 哈尔滨金纳科技有限公司 A kind of preparation method of CNT composite graphite alkene anticorrosive paint
CN107964335A (en) * 2017-10-30 2018-04-27 合肥林邦门业有限公司 A kind of wood furniture extinguishing waterborn preparation method for coating
CN108546497A (en) * 2018-05-09 2018-09-18 常州市华菱新材料有限公司 A kind of self-drying type epoxy coating and preparation method thereof and application method
CN108840586A (en) * 2018-08-23 2018-11-20 天津大学 Ion response type gel and preparation method and application suitable for cement silicate self-healing system

Also Published As

Publication number Publication date
CN110982387A (en) 2020-04-10

Similar Documents

Publication Publication Date Title
CN110982387B (en) Water-based epoxy coating with good adhesive force and corrosion resistance on surface of metal substrate and preparation method thereof
CN105349019A (en) Water-borne acrylic polyurethane primer-topcoat corrosion-resistant decorative coating containing double components and preparation method of coating
CN102358804A (en) Special binder for waterbrone inorganic zinc-rich anti-corrosion coating
CN103205142A (en) Organic modified ceramic non-stick ceramic coating and coating method thereof
CN107418277B (en) A kind of water nano long-effective corrosion finishing coat and preparation method thereof
CN101781496A (en) Composition of water-based silver powder coating
CN102585667B (en) Hydrophilic ultraviolet light curing coating and preparation method thereof
CN109517516B (en) Certified bentonite modified waterborne polyurethane coating and preparation method thereof
CN109401564B (en) High-weather-resistance hydrophobic self-cleaning metal curtain wall plate and preparation method thereof
CN101693801A (en) Rare earth modification exterior wall water-borne fluorocarbon coating and preparation method thereof
CN108285730A (en) Suitable for outdoor high performance polyurethane terrace sealing wax
CN110885617A (en) Rust conversion coating and preparation method thereof
CN111269626B (en) Preparation method of epoxy acrylic polysiloxane self-cleaning coating
CN111087906B (en) Waterborne two-component polyurethane paint for galvanized sheet and preparation method thereof
CN109370420A (en) A kind of high weather resistant water-thinned preparation method of anticorrosion paint
CN111320917A (en) Water-based single-component epoxy anticorrosive paint coated on automobile plate spring and preparation method thereof
CN103865377B (en) A kind of water soluble acrylic acid Polyurethane-organosilicone Coatings
CN106967317A (en) A kind of environment-friendlywater-based water-based paint
CN107987247A (en) A kind of dual-component polyurethane Drawing board for children paint
CN113604119A (en) Water-based hydrophobic self-cleaning finishing oil and preparation method thereof
CN112480793B (en) Zinc-rich coating and preparation method thereof
CN109181473B (en) High-performance bi-component water-based anticorrosive paint and preparation method thereof
CN112358777B (en) Water-based PU self-drying erasable protective coating and preparation method and application thereof
CN112552779B (en) Environment-friendly low-surface-treatment water-based epoxy thick paste acid-alkali-resistant coating and preparation method thereof
CN110560344B (en) Aluminum alloy surface ATS composite membrane compatible with FEVE fluorocarbon powder coating and preparation method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant