CN107474693A - Low-surface-energy metal water-base epoxy paint base composition and preparation method thereof - Google Patents
Low-surface-energy metal water-base epoxy paint base composition and preparation method thereof Download PDFInfo
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- CN107474693A CN107474693A CN201710754511.6A CN201710754511A CN107474693A CN 107474693 A CN107474693 A CN 107474693A CN 201710754511 A CN201710754511 A CN 201710754511A CN 107474693 A CN107474693 A CN 107474693A
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
- B05D7/16—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies using synthetic lacquers or varnishes
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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
- C09D5/002—Priming 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/02—Emulsion paints including aerosols
- C09D5/024—Emulsion paints including aerosols characterised by the additives
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Abstract
The invention discloses a kind of low-surface-energy metal water-base epoxy paint base composition, said composition includes component A and B component, and according to mass parts meter, component A includes：35 70 parts of aqueous epoxy emulsions, 10 20 parts of deionized waters, 0.5 2 parts of wetting dispersing agents, 0.2 1 parts of defoamers, 5 20 parts of pigment, 5 15 parts of rust resisting pigments, 10 20 parts of fillers, 0.3 1.5 parts of flash rust inhibitors, 0.1 0.5 parts of substrate wetting agents, 0.3 1 parts of thickeners, the epoxide equivalent of aqueous epoxy emulsion is 800 1100；According to mass parts meter, B component includes：60 80 parts of aqueous epoxy curing agents, 20 40 parts of deionized waters；And the ratio between aqueous epoxy curing agent active hydrogen equivalent weight is 1 in the epoxide equivalent of aqueous epoxy emulsion and B component in component A:0.6‑0.7.Also disclose a kind of preparation method of low-surface-energy metal water-base epoxy priming paint.Water-base epoxy priming paint disclosed by the invention, it is suitable for surface energy and is used than relatively low metal, such as aluminium, galvanized sheet or surface of stainless steel, adhesive force is high, and water resistance is excellent, and paint film flexibility is good.
Description
Technical field
The invention belongs to water paint field, and in particular to low-surface-energy metal epoxy primer composition and its preparation side
Method.
Background technology
With expanding economy, water paint products application is increasingly popularized, and aluminium, galvanized sheet, stainless steel etc. are good because of its
Good anticorrosive property, widely used in building, manufacture and industrial circle.Their good anticorrosive properties both are from its surface and formed
One layer of inertia, the sull of low-surface-energy, and the inertia and low-surface-energy of this layer of sull often make coating not
Can firmly it stick.Or the water resistance of paint film is not good enough, easily foaming, can not meet requirement.
The content of the invention
Problem in view of the above, should the invention discloses a kind of low-surface-energy metal water-base epoxy paint base composition
Composition includes component A and B component, wherein：According to mass parts meter, component A includes the following raw material：
The epoxide equivalent of the aqueous epoxy emulsion is 800-1100；
According to mass parts meter, B component includes the following raw material：
Aqueous epoxy curing agent 60-80 parts,
Deionized water 20-40 parts；
And the ratio between aqueous epoxy curing agent active hydrogen equivalent weight in the epoxide equivalent of aqueous epoxy emulsion and B component in component A
For 1:0.6-0.7.
As the alternative embodiment of low-surface-energy water-base epoxy priming paint disclosed by the invention, the ring of the aqueous epoxy emulsion
Oxygen equivalent is 1000-1100.
As the alternative embodiment of low-surface-energy water-base epoxy priming paint disclosed by the invention, aqueous epoxy emulsion in component A
Epoxide equivalent and B component in the ratio between aqueous epoxy curing agent active hydrogen equivalent weight can be 1:0.68-0.7.
As the alternative embodiment of low-surface-energy water-base epoxy priming paint disclosed by the invention, aqueous epoxy emulsion can be room
The curable aqueous epoxy resin latex of temperature.
As the alternative embodiment of low-surface-energy water-base epoxy priming paint disclosed by the invention, the aqueous epoxy resin emulsion
For aliphatic epoxy resin emulsion.
Further, the alternative embodiment as low-surface-energy water-base epoxy priming paint disclosed by the invention, the aliphatic ring
Oxygen tree fat liquor is long-chain fat race epoxy resin latex.
As the alternative embodiment of low-surface-energy water-base epoxy priming paint disclosed by the invention, the aqueous epoxy curing agent is
Amine curing agent.
The invention also discloses a kind of preparation method of water-base epoxy paint base composition, comprise the following steps：
It is prepared by component A：
Deionized water, 400-600rpm stirrings are added in a reservoir；
Sequentially add wetting dispersing agent, defoamer, pigment, rust resisting pigment, filler；
Rotational speed regulation disperses 20min, mill base is ground into fineness≤25 μm to 1000rpm；
Aqueous epoxy emulsion, flash rust inhibitor, substrate wetting agents and thickener are sequentially added, obtains component A, it is standby.
It is prepared by B component：
Aqueous epoxy curing agent, deionized water are disperseed into 15min under 400-600rpm stirrings, B component is made, it is standby；
Using it is preceding by A, B component according to the ratio between aqueous epoxy emulsion epoxide equivalent and aqueous epoxy curing agent active hydrogen equivalent weight
Mixing.
The invention also discloses a kind of coating application technique, is used in low-surface-energy metal surface disclosed by the invention water-based
Epoxy primer.
As the alternative embodiment of coating application technique disclosed by the invention, water-base epoxy bottom disclosed by the invention is being used
Before paint, pretreatment of metal surface step can also be included.
As the alternative embodiment of coating application technique disclosed by the invention, pre-treatment step can include with cleaning agent
Manage low-surface-energy metal surface.
Further, the alternative embodiment as coating application technique disclosed by the invention, cleaning agent can include organic molten
Agent, slightly acidic water solution or weak alkaline aqueous solution.
Further, the alternative embodiment as coating application technique disclosed by the invention, processing low-surface-energy metal surface
The coating of such metal surface or spraying cleaning agent can be included in.
As the alternative embodiment of coating application technique disclosed by the invention, pre-treatment step can include using 80-180 mesh
Sand paper polishing low-surface-energy metal surface.
As the alternative embodiment of coating application technique disclosed by the invention, pre-treatment step can also be included with pressurization gas
Body processing low-surface-energy metal surface.
Further, the alternative embodiment as coating application technique disclosed by the invention, described gas-pressurized are drying
Air.
Water-base epoxy priming paint disclosed by the invention, is suitable for the metal in low-surface-energy, such as aluminium, galvanized sheet or stainless steel
Material surface uses.
Water-base epoxy priming paint disclosed in the embodiment of the present invention, in low-surface-energy metal surface, adhesive force is high, and water resistance is excellent
Different, paint film flexibility is good.
Embodiment
Special word " embodiment " herein, any embodiment as exemplary illustration should not necessarily be construed as preferred or advantageous over
Other embodiments.Testing performance index in this law embodiment, unless stated otherwise, using this area conventional methods.
In order to better illustrate present invention, numerous details is given in specific embodiment below.This
Art personnel should be appreciated that no some details, and the present invention can equally be implemented.In embodiment, for some
Method well known to those skilled in the art, means, raw material, reagent, Parameter Conditions are not described in detail, in order to highlight the present invention
Purport.
It should be understood that heretofore described term is only to describe special embodiment, being not intended to limit this hair
Bright disclosure.
Unless otherwise stated, all technologies used herein and scientific terminology have routine of the art
The identical meanings that technical staff is generally understood that.
Epoxy coating is the coating using epoxy resin as main film forming substance.Epoxy resin abbreviation EP, it is molecule knot
The general name of resin containing two or more epoxy radicals in structure.No matter molecule is long or short, the both ends of key are essentially all ring
Epoxide, and the degree of functionality of epoxy radicals be 2, with curing agent crosslinking curing after, tridimensional network can be formed, so epoxy resin
It is a kind of three dimensional polymer.According to degree of polymerization size, liquid or solid-state can be divided into.Epoxy resin is thermoplasticity in itself
, to make epoxy resin that useful coating be made, must just epoxy resin is reacted with curing agent, be cross-linked into insoluble and not
Molten tridimensional network, it can just show various excellent performances.Particularly, it is desirable to it is stronger to the adhesive force of metal surface,
Just need to contain aliphatic alkyl, ehter bond and as lively as a cricket epoxy radicals in the structure, the first two base produces between two adjacent surfaces
Gravitation, epoxy radicals react with metal surface containing active hydrogen and generate chemical bond, simultaneously because forming tridimensional network, its resistance toization
Medicament is excellent, and especially alkali resistance is more preferable.So the present invention discloses selection long-chain fat race epoxy resin, gold can be increased
Belong to the pliability of material surface paint film.
Water-base epoxy is heterogeneous system, and epoxy resin and curing agent are dispersed in aqueous phase with disperse phase, crosslinking curing
Process is interpenetrating between particulate during moisture evaporation, diffusion inside, cross-linking reaction process, therefore compatibility shadow
The compatibility of the curing degree of sound water-base epoxy, aqueous epoxy resins and aqueous epoxy curing agent is better, is more advantageous to curing agent
Particulate and the mutual diffusion inside of epoxy resin particulate, are advantageous to the progress of curing reaction；Moreover, aqueous epoxy resins and water-based ring
When oxygen curing agent dispersed phase particles particle diameter is smaller, kernel can be more fully hereinafter interpenetrated to so as to reach more completely solidification path
Degree；The hydrophilic lipophilic balance of aqueous epoxy resins and aqueous epoxy curing agent approaches, and reaches consistent in aqueous phase and coexists surely
Determine state, if differed greatly, the stronger component of hydrophily gradually can be gathered in aqueous phase, so as to cause resin phase and curing agent
It is separated；, could be mutually equal by resin phase and curing agent only by certain mechanical agitation in the state of multi-phase separation
It is even to be distributed in aqueous phase.For example, the present invention discloses epoxy resin latex can be selected profound new for the U.S.VEP
2381w/55WA or LG-DOW DER WB6001 or both mixture.
Epoxide equivalent refers to the epoxy resin grams containing monovalent epoxy radicals, the i.e. amount of resin containing an epoxy radicals, single
Position for gram/equivalent, i.e., the value of epoxy radicals quantity contained by the mean molecule quantity of epoxy resin divided by each molecule.
Aqueous epoxy resin curing agent function is chemically reacted with aqueous epoxy resins, forms netted stereopolymerization
Thing, composite aggregate envelope among reticulate body.
The selection of aqueous epoxy curing agent is, it is necessary to according to the specific bar such as epoxy resin type and use environment, solidification regulation
Part selects.The more amine additives curing agent of water-soluble modified epoxy of nonionic can such as be selected.The curing agent completely using water as
Diluent, without alcohol ethers solvent or cosolvent, without acetate type nertralizer.The liquid epoxy of common low molecule amount can be emulsified
The epoxy resin latex of resin, and can and HMW is used cooperatively.Usually obtain and solidify good paint film, solidification temperature should
More than 10 DEG C, relative humidity is advisable below 80%.In the present disclosure, amine curing agent can be selected.Various solidifications
The solidification temperature of agent is different, and the heat resistance of solidfied material is also very different.In general, using the high solidification of solidification temperature
Agent can obtain heat-resisting excellent solidfied material.For addition polymerization type curing agent, solidification temperature and heat resistance carry in the following order
It is high：Aliphatic polyamine<Alicyclic polyamine<Aromatic polyamine ≈ phenolic aldehyde<Acid anhydrides.Curing reaction belongs to chemical reaction, by solidification temperature
Degree influence is very big, and temperature increases, and reaction speed is accelerated, and gel time shortens；The logarithm value of gel time rises with solidification temperature
Generally straight downward trend, but solidification temperature is too high, often declines condensate performance, so the upper limit of solidification temperature be present；
The temperature for making curing rate and condensate performance trade off must be selected, as suitable solidification temperature.Primary amine and secondary amine are to epoxy
The solidification of resin is to open epoxide group by the active hydrogen on nitrogen-atoms, and is allowed to crosslinking curing.Aliphatic polyamine is such as
Ethylenediamine, hexamethylene diamine, diethylenetriamine, triethylene tetramine, diethylaminopropylamine isoreactivity are larger, can make epoxy resin in room temperature
Crosslinking curing.The present invention disclose low temperature curing agent of the preferred consolidation temperature below 50 DEG C, more preferably solidification temperature for room temperature~
50 DEG C of room temperature curing agent.Room temperature refers to the temperature of use environment under normal conditions, and it is commonly called can also to refer to this area
Environment temperature is 25 DEG C.
Under normal circumstances, the quantity of aqueous epoxy resins and aqueous epoxy resin curing agent is selected, it is necessary to reference to water-based
The epoxide equivalent of epoxy resin, and the active hydrogen equivalent weight of aqueous epoxy resin curing agent.Generally for the paint for obtaining stable performance
Film, epoxy resin can be fully cured, and can select the ratio between epoxide equivalent and active hydrogen equivalent weight 1:Between 0.8-1.2, but this
The selection of sample can not obtain stable performance and protect good paint film in low-surface-energy metal surface.The present invention discloses selection ring
Oxygen equivalent is 1 with active hydrogen equivalent weight:Between 0.6-0.7, it is found that the paint film property to be formed is stable, solidification is good, and pliability
More preferably, the adhesive force in metal surface greatly increases.As preferred embodiment side, the ratio between the two can be selected 1:
Between 0.68-0.7.
Metal material surface, such as aluminium, zinc-plating material or surface of stainless steel, it is miscellaneous often to have grease, rust staining etc.
Matter is present, or is adsorbed with some moisture etc., can influence priming paint filming performance in base coat construction, if it is possible to
Metal surface is pre-processed before coating application, then these impurity or moisture etc. can be gone out, obtain clean material
Surface, the paint film of formation is uniform, is contacted with surface close good, and paint film property is stable, is advantageous to increase the service life.The present invention
It is open to use the modes such as organic solvent, acidic aqueous solution or gas-pressurized, you can such to solve the problems, such as.Organic solvent can be with
Grease by metal surface etc. dissolves, and reaches the effect of removing.Organic solvent can use common alcohols, such as ethanol.Can be with
Using weakly acidic solution, such as weak organic acid, or slightly acidic water solution, you can remove the rust staining on surface etc. impurity.Acid solution
Including but not limited to acetic acid, acidic buffer solution, low-concentration hcl, low-concentration sulfuric acid, low concentration nitric acid etc..It is described herein
Weakly acidic solution, refer to hydrogen ion concentration very little in solution, it is possible to be the low concentration solutions of the strong acid such as hydrochloric acid or weak
The highly concentrated solution of acid such as carbonic acid.Weakly alkaline solution can also be used, removes the dirts such as the oil stain of metal surface, as sodium carbonate is molten
Liquid, low-concentration sodium hydroxide solution etc..It is appreciated that the weak base addressed herein also refers to the concentration of hydroxide ion in solution very
It is small.Pretreatment time and weak acid or weak base concentration etc. can be tested according to the grease of surface to be treated, rust staining situation and determined.May be used also
To be handled using compressed gas, such as compressed air, nitrogen, inert gas metal surface, such as high pressure gas is directly used
Body purges metal surface, removes the hydrone of adsorption, or organic the greasy dirt molecule or air of other influences priming paint film forming
In contaminant particle, the metal surface totally cleaned.
In embodiment disclosed by the invention, with sand paper polishing low-surface-energy metal surface, make its surface that there is roughness, just
In obtaining the good paint film of adhesive force in metal material surface.The specification of sand paper can select, such as 80-180 mesh.
Wetting dispersing agent, defoamer, pigment, rust resisting pigment, flash rust inhibitor, filler, the base that the present invention addresses in disclosing
Material wetting agent, thickener etc., it can use in water paint field commonly used material, especially, with epoxy resin breast
The sealing wax auxiliary agent or auxiliary material that liquid uses typically together.
The embodiment of the present invention selects aqueous epoxy emulsion profound new for the U.S.VEP 2381w/55WA or the U.S.
Tao Shi DER WB6001 or both mixture.WhereinVEP 2381w/55WA solid content is 55%, epoxy
Equivalent is 850-960；DER WB6001 solid content is 47%, epoxide equivalent 1050.
The present invention disclose embodiment select aqueous epoxy curing agent forEH613w/80WA, solid content are
80%, active hydrogen equivalent weight 145.
Embodiment 1
Low-surface-energy metal water-base epoxy paint base composition disclosed in the present embodiment 1, comprising component A and B component, its
In：
Component A includes the composition of following mass parts：40 parts of aqueous epoxy emulsion, 18 parts of deionized water, wetting dispersing agent 0.9
Part, 0.3 part of defoamer, 15 parts of pigment, 10 parts of rust resisting pigment, 14 parts of filler, 1 part of flash rust inhibitor, 0.3 part of substrate wetting agents,
0.5 part of thickener；
B component includes the composition of following mass parts：70 parts of aqueous epoxy curing agent, 30 parts of deionized water；
The ratio between aqueous epoxy curing agent active hydrogen equivalent weight is in the epoxide equivalent of aqueous epoxy emulsion and B component in component A
1:0.63。
Aqueous epoxy emulsion is that the U.S. is profound newVEP 2381w/55WA, aqueous epoxy curing agent areEH613w/80WA。
It is prepared as follows the present embodiment water-base epoxy paint base composition.
It is prepared by component A：
Deionized water, 400rpm stirrings are added in a reservoir；
Sequentially add wetting dispersing agent, defoamer, pigment, rust resisting pigment, filler；
Rotational speed regulation is disperseed 20 minutes to 1000rpm, mill base is ground into fineness≤25 μm；
Aqueous epoxy emulsion, flash rust inhibitor, substrate wetting agents and thickener are sequentially added, obtains component A, it is standby.
It is prepared by B component：
Aqueous epoxy curing agent, deionized water are disperseed into 15min under 600rpm stirrings, B component is made；
By A, B component according to the ratio between the epoxide equivalent of aqueous epoxy emulsion and aqueous epoxy curing agent active hydrogen equivalent weight 1:
0.63 mixing.
Aluminium, galvanized sheet and stainless steel material are blown off with pressure-air, then in its surface spraying water-base epoxy priming paint
Composition, to solidification is completely dried, carry out performance test, such as adhesive force, impact resistance, pliability and water resistance performance.Survey
Amount the results are shown in Table 1.
Embodiment 2
Low-surface-energy metal water-base epoxy paint base composition disclosed in the present embodiment 2, comprising component A and B component, its
In：
Component A includes the composition of following mass parts：50 parts of aqueous epoxy emulsion, 15 parts of deionized water, wetting dispersing agent 0.7
Part, 0.5 part of defoamer, 14 parts of pigment, 8 parts of rust resisting pigment, 10 parts of filler, 0.8 part of flash rust inhibitor, 0.4 part of substrate wetting agents,
0.6 part of thickener；
B component includes the composition of following mass parts：80 parts of aqueous epoxy curing agent, 20 parts of deionized water；
The ratio between aqueous epoxy curing agent active hydrogen equivalent weight is in the epoxide equivalent of aqueous epoxy emulsion and B component in component A
1:0.68。
Aqueous epoxy emulsion is LG-DOW DER WB6001, and aqueous epoxy emulsion curing agent is
EH613w/80WA。
It is prepared as follows water-base epoxy paint base composition disclosed in the present embodiment.
It is prepared by component A：
Deionized water, 500rpm stirrings are added in a reservoir；
Sequentially add wetting dispersing agent, defoamer, pigment, rust resisting pigment, filler；
Rotational speed regulation is disperseed 20 minutes to 1000rpm, mill base is ground into fineness≤25 μm；
Aqueous epoxy emulsion, flash rust inhibitor, substrate wetting agents and thickener are sequentially added, obtains component A, it is standby.
It is prepared by B component：
Aqueous epoxy curing agent, deionized water are disperseed into 15min under 400rpm stirrings, B component is made；
By A, B component according to the ratio between the epoxide equivalent of aqueous epoxy emulsion and aqueous epoxy curing agent active hydrogen equivalent weight 1:
0.68 mixing.
Aluminium, galvanized sheet and stainless steel material are polished with 80 mesh sand paper, blown off surface with pressure-air, then at it
Surface spraying water-base epoxy paint base composition, to solidification is completely dried, performance test is carried out, such as adhesive force, impact resistance, flexible
The performance such as property and water resistance.Measurement result is shown in Table 1.
Embodiment 3
Low-surface-energy metal water-base epoxy paint base composition disclosed in the present embodiment 3, comprising component A and B component, its
In：
Component A includes the composition of following mass parts：55 parts of aqueous epoxy emulsion, 10 parts of deionized water, wetting dispersing agent 0.8
Part, 0.6 part of defoamer, 16 parts of pigment, 10 parts of rust resisting pigment, 6 parts of filler, 0.9 part of flash rust inhibitor, 0.3 part of substrate wetting agents,
0.4 part of thickener；
B component includes the composition of following mass parts：75 parts of aqueous epoxy curing agent, 25 parts of deionized water；
The ratio between aqueous epoxy curing agent active hydrogen equivalent weight is in the epoxide equivalent of aqueous epoxy emulsion and B component in component A
1:0.7；
Aqueous epoxy resin emulsion is that the U.S. is profound newVEP 2381w/55WA and LG-DOW DER
WB6001 mixture, aqueous epoxy resin curing agent areEH613w/80WA。
Water-base epoxy paint base composition preparation method comprises the following steps disclosed in the present embodiment：
It is prepared by component A：
Deionized water, 600rpm stirrings are added in a reservoir；
Sequentially add wetting dispersing agent, defoamer, pigment, rust resisting pigment, filler；
Rotational speed regulation disperses 20min, mill base is ground into fineness≤25 μm to 1000rpm；
Aqueous epoxy emulsion, flash rust inhibitor, substrate wetting agents and thickener are sequentially added, obtains component A, it is standby.
It is prepared by B component：
Aqueous epoxy curing agent, deionized water are disperseed into 15min under 500rpm stirrings, B component is made；
By A, B component according to the ratio between the epoxide equivalent of aqueous epoxy emulsion and aqueous epoxy curing agent active hydrogen equivalent weight 1:
0.7 mixing.
Aluminium, galvanized sheet and stainless steel material are blown off with pressure-air, then in its surface spraying water-base epoxy priming paint
Composition, to solidification is completely dried, carry out performance test, such as adhesive force, impact resistance, pliability and water resistance performance.Survey
Amount the results are shown in Table 1.
Comparative example 1
Aqueous epoxy curing agent in the epoxide equivalent of aqueous epoxy emulsion in component A in embodiment 1 and B component is active
The ratio between hydrogen equivalent is adjusted to as 1:0.8, obtain the water-base epoxy paint base composition of this comparative example 1.
Water-base epoxy paint base composition is sprayed in aluminium, galvanized sheet and surface of stainless steel, to solidification is completely dried, is entered
Row performance test, such as adhesive force, impact resistance, pliability and water resistance performance.Measurement result is shown in Table 1.
Comparative example 2
Aqueous epoxy curing agent in the epoxide equivalent of aqueous epoxy emulsion in component A in embodiment 1 and B component is active
The ratio between hydrogen equivalent is 1:1.
Aluminium, galvanized sheet and surface of stainless steel are sprayed into water-base epoxy paint base composition, to solidification is completely dried, entered
Row performance test, such as adhesive force, impact resistance, pliability and water resistance performance.Measurement result is shown in Table 1.
Therefore, the water-base epoxy paint base composition of the invention disclosed in embodiment is in aluminium, galvanized sheet or stainless steel material
Surface uses, and adhesive force is high, and water resistance is excellent, and paint film flexibility is good.
The embodiment of table 1 and comparative example measurement result list
Claims (17)
1. low-surface-energy metal water-base epoxy paint base composition, it is characterised in that including component A and B component, wherein, according to
Mass parts meter, component A include the following raw material：
The epoxide equivalent of the aqueous epoxy emulsion is 800-1100；
B component includes the following raw material：
Aqueous epoxy curing agent 60-80 parts,
Deionized water 20-40 parts；
In the component A in the epoxide equivalent of aqueous epoxy emulsion and the B component aqueous epoxy curing agent active hydrogen equivalent weight it
Than for 1:0.6-0.7.
2. epoxy primer composition according to claim 1, it is characterised in that the epoxide equivalent of the aqueous epoxy emulsion
For 1000-1100.
3. epoxy primer composition according to claim 1, it is characterised in that aqueous epoxy emulsion in the component A
The ratio between aqueous epoxy curing agent active hydrogen equivalent weight is 1 in epoxide equivalent and the B component:0.68-0.7.
4. epoxy primer composition according to claim 1, it is characterised in that the aqueous epoxy emulsion is cold curing
Type aqueous epoxy resin emulsion.
5. epoxy primer composition according to claim 1, it is characterised in that the aqueous epoxy resin emulsion is fat
Race's epoxy resin latex.
6. epoxy primer composition according to claim 5, it is characterised in that the aliphatic epoxy resin emulsion is length
Chain fatty race epoxy resin latex.
7. water-base epoxy paint base composition according to claim 1, it is characterised in that the aqueous epoxy curing agent is amine
Class curing agent.
8. the preparation method of the water-base epoxy paint base composition described in claim any one of 1-7, it is characterised in that including as follows
Step：
It is prepared by component A：
Deionized water, 400-600rpm stirrings are added in a reservoir；
Sequentially add wetting dispersing agent, defoamer, pigment, rust resisting pigment, filler；
Rotational speed regulation disperses 20min, mill base is ground into fineness≤25 μm to 1000rpm；
Aqueous epoxy emulsion, flash rust inhibitor, substrate wetting agents and thickener are sequentially added, obtains component A, it is standby.
It is prepared by B component：
Aqueous epoxy curing agent, deionized water are disperseed into 15min under 400-600rpm stirrings, B component is made；
Using preceding that A, B component is mixed according to the ratio between the epoxide equivalent of aqueous epoxy emulsion and aqueous epoxy curing agent active hydrogen equivalent weight
Close.
9. a kind of coating application technique, it is characterised in that require any one of 1-7 in low-surface-energy metal material surface usage right
Described water-base epoxy priming paint.
10. coating application technique according to claim 9, it is characterised in that required in usage right described in any one of 1-7
Water-base epoxy priming paint before, in addition to low-surface-energy metal material surface pre-treatment step.
11. coating application technique according to claim 10, it is characterised in that described pre-treatment step is included with cleaning
Agent processing low-surface-energy metal surface.
12. coating application technique according to claim 11, it is characterised in that described cleaning agent include organic solvent,
Weakly acidic solution or weakly alkaline solution.
13. coating application technique according to claim 11, it is characterised in that the processing low-surface-energy metal surface,
It is included in the coating of low-surface-energy metal surface or sprays the cleaning agent.
14. coating application technique according to claim 10, it is characterised in that described pre-treatment step includes using 80-
180 mesh sand paper polishing low-surface-energy metal surface.
15. coating application technique according to claim 10, it is characterised in that described pre-treatment step is included with pressurization
Gas treatment low-surface-energy metal surface.
16. coating application technique according to claim 15, it is characterised in that described gas-pressurized is dry air.
17. according to the coating application technique described in claim any one of 10-16, it is characterised in that described low-surface-energy gold
Category material includes aluminium, galvanized sheet or stainless steel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710754511.6A CN107474693A (en) | 2017-08-29 | 2017-08-29 | Low-surface-energy metal water-base epoxy paint base composition and preparation method thereof |
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| CN201710754511.6A CN107474693A (en) | 2017-08-29 | 2017-08-29 | Low-surface-energy metal water-base epoxy paint base composition and preparation method thereof |
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| CN108864891A (en) * | 2018-06-05 | 2018-11-23 | 河北晨阳工贸集团有限公司 | A kind of two-component quick-drying abrasion-resistance water epoxy coating and preparation method thereof |
| CN110791170A (en) * | 2019-11-04 | 2020-02-14 | 德爱威（中国）有限公司 | Water-based bonding primer and preparation method thereof |
| CN111019483A (en) * | 2019-12-25 | 2020-04-17 | 清远雅克化工有限公司 | High-performance water-based epoxy coating and preparation method thereof |
| CN112280429A (en) * | 2020-10-30 | 2021-01-29 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Anti-corrosion self-cleaning composite coating and preparation method and application thereof |
| CN112374791A (en) * | 2020-11-20 | 2021-02-19 | 内蒙古电力（集团）有限责任公司巴彦淖尔电业局 | Anticorrosion additive for all telegraph pole in high saline-alkali area and preparation method thereof |
| CN115558373A (en) * | 2022-10-11 | 2023-01-03 | 广州集泰化工股份有限公司 | Water-based epoxy primer for rail transit and preparation method thereof |
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| CN108864891A (en) * | 2018-06-05 | 2018-11-23 | 河北晨阳工贸集团有限公司 | A kind of two-component quick-drying abrasion-resistance water epoxy coating and preparation method thereof |
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| CN112280429A (en) * | 2020-10-30 | 2021-01-29 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Anti-corrosion self-cleaning composite coating and preparation method and application thereof |
| CN112374791A (en) * | 2020-11-20 | 2021-02-19 | 内蒙古电力（集团）有限责任公司巴彦淖尔电业局 | Anticorrosion additive for all telegraph pole in high saline-alkali area and preparation method thereof |
| CN115558373A (en) * | 2022-10-11 | 2023-01-03 | 广州集泰化工股份有限公司 | Water-based epoxy primer for rail transit and preparation method thereof |
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