CN114773952B - Concrete protective coating and preparation method thereof - Google Patents
Concrete protective coating and preparation method thereof Download PDFInfo
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- CN114773952B CN114773952B CN202210470200.8A CN202210470200A CN114773952B CN 114773952 B CN114773952 B CN 114773952B CN 202210470200 A CN202210470200 A CN 202210470200A CN 114773952 B CN114773952 B CN 114773952B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 30
- 239000011253 protective coating Substances 0.000 title claims abstract description 30
- 230000035515 penetration Effects 0.000 claims abstract description 23
- 239000003822 epoxy resin Substances 0.000 claims description 92
- 229920000647 polyepoxide Polymers 0.000 claims description 92
- 239000003973 paint Substances 0.000 claims description 74
- 239000002994 raw material Substances 0.000 claims description 38
- 239000002904 solvent Substances 0.000 claims description 38
- 239000003795 chemical substances by application Substances 0.000 claims description 36
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 35
- 239000000843 powder Substances 0.000 claims description 34
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 33
- 229910000077 silane Inorganic materials 0.000 claims description 33
- 238000002156 mixing Methods 0.000 claims description 32
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 30
- 239000004952 Polyamide Substances 0.000 claims description 26
- 229920002647 polyamide Polymers 0.000 claims description 26
- 238000005303 weighing Methods 0.000 claims description 26
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 24
- 239000002270 dispersing agent Substances 0.000 claims description 24
- 238000000227 grinding Methods 0.000 claims description 23
- 229920003180 amino resin Polymers 0.000 claims description 20
- 239000000440 bentonite Substances 0.000 claims description 20
- 229910000278 bentonite Inorganic materials 0.000 claims description 20
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 20
- 239000006229 carbon black Substances 0.000 claims description 20
- 239000004593 Epoxy Substances 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 18
- 239000013530 defoamer Substances 0.000 claims description 18
- 239000010456 wollastonite Substances 0.000 claims description 18
- 229910052882 wollastonite Inorganic materials 0.000 claims description 18
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 16
- 239000001038 titanium pigment Substances 0.000 claims description 15
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 13
- 239000004925 Acrylic resin Substances 0.000 claims description 12
- 229920000178 Acrylic resin Polymers 0.000 claims description 12
- 230000000149 penetrating effect Effects 0.000 claims description 12
- 239000012856 weighed raw material Substances 0.000 claims description 12
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 11
- 150000004291 polyenes Chemical class 0.000 claims description 11
- 239000008096 xylene Substances 0.000 claims description 11
- 238000013461 design Methods 0.000 claims description 10
- 239000004698 Polyethylene Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- -1 polyethylene Polymers 0.000 claims description 9
- 229920000573 polyethylene Polymers 0.000 claims description 9
- GODZNYBQGNSJJN-UHFFFAOYSA-N 1-aminoethane-1,2-diol Chemical compound NC(O)CO GODZNYBQGNSJJN-UHFFFAOYSA-N 0.000 claims description 8
- FMGBDYLOANULLW-UHFFFAOYSA-N 3-isocyanatopropyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)CCCN=C=O FMGBDYLOANULLW-UHFFFAOYSA-N 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 8
- 239000005057 Hexamethylene diisocyanate Substances 0.000 claims description 8
- 230000002745 absorbent Effects 0.000 claims description 8
- 239000002250 absorbent Substances 0.000 claims description 8
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 claims description 8
- 239000002557 mineral fiber Substances 0.000 claims description 8
- 239000005056 polyisocyanate Substances 0.000 claims description 8
- 229920001228 polyisocyanate Polymers 0.000 claims description 8
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 8
- DCKVNWZUADLDEH-UHFFFAOYSA-N sec-butyl acetate Chemical compound CCC(C)OC(C)=O DCKVNWZUADLDEH-UHFFFAOYSA-N 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims description 6
- 239000002518 antifoaming agent Substances 0.000 claims description 6
- 239000012975 dibutyltin dilaurate Substances 0.000 claims description 6
- 239000000049 pigment Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims 2
- ZDWQSEWVPQWLFV-UHFFFAOYSA-N C(CC)[Si](OC)(OC)OC.[O] Chemical compound C(CC)[Si](OC)(OC)OC.[O] ZDWQSEWVPQWLFV-UHFFFAOYSA-N 0.000 claims 1
- 239000004408 titanium dioxide Substances 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 10
- 230000001681 protective effect Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 8
- 239000011148 porous material Substances 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000011161 development Methods 0.000 abstract description 3
- 230000007613 environmental effect Effects 0.000 abstract description 3
- 230000003487 anti-permeability effect Effects 0.000 abstract description 2
- 238000007596 consolidation process Methods 0.000 abstract description 2
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 238000011065 in-situ storage Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 14
- 238000011056 performance test Methods 0.000 description 10
- 238000000576 coating method Methods 0.000 description 9
- 230000001070 adhesive effect Effects 0.000 description 8
- 239000002519 antifouling agent Substances 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 7
- 230000032683 aging Effects 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 6
- 238000004132 cross linking Methods 0.000 description 6
- 125000003700 epoxy group Chemical group 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 125000003277 amino group Chemical group 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 2
- 230000007062 hydrolysis Effects 0.000 description 2
- 238000006460 hydrolysis reaction Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000011179 visual inspection Methods 0.000 description 2
- MTEZSDOQASFMDI-UHFFFAOYSA-N 1-trimethoxysilylpropan-1-ol Chemical compound CCC(O)[Si](OC)(OC)OC MTEZSDOQASFMDI-UHFFFAOYSA-N 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000004841 bisphenol A epoxy resin Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005010 epoxy-amino resin Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 125000001905 inorganic group Chemical group 0.000 description 1
- 229910052909 inorganic silicate Inorganic materials 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000000962 organic group Chemical group 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 229940124543 ultraviolet light absorber Drugs 0.000 description 1
- 239000006097 ultraviolet radiation absorber Substances 0.000 description 1
Classifications
-
- 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
- C08G59/14—Polycondensates modified by chemical after-treatment
- C08G59/1433—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds
- C08G59/1477—Polycondensates modified by chemical after-treatment with organic low-molecular-weight compounds containing nitrogen
-
- 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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
-
- 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
-
- 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
-
- 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
- C09D7/61—Additives non-macromolecular inorganic
-
- 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
- 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
- C09D7/65—Additives macromolecular
-
- 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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
-
- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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- 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
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- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
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- Paints Or Removers (AREA)
Abstract
The invention relates to the technical field of building engineering protective materials, and particularly discloses a concrete protective coating and a preparation method thereof. The concrete protective coating comprises a penetration primer, an elastic intermediate coat and an elastic top coat, wherein the penetration primer comprises an A component and a B component. The concrete protective coating provided by the invention has excellent infiltration-consolidation performance, can infiltrate into pores of concrete and is cured and crosslinked in situ, so that capillaries, pores and microcracks formed by a porous medium of the concrete are eliminated, the concrete structure is repaired, the concrete has excellent anti-permeability and anti-corrosion functions, the damage of the environment on the concrete structure can be resisted, the safe service life of the concrete structure is prolonged, the environmental damage and energy consumption caused by reconstruction can be greatly reduced, the sustainable development of expressway infrastructure is realized, and the concrete protective coating has wide market prospect and popularization value.
Description
Technical Field
The invention relates to the technical field of building engineering protective materials, in particular to a concrete protective coating and a preparation method thereof.
Background
In recent years, concrete is widely applied to hydroelectric dams, sea-crossing bridges, coastal projects and island reef construction, and the concrete structure has excellent properties of easy pouring, impact resistance, wear resistance and the like, so that the concrete structure becomes an indispensable component in the construction of expressway infrastructure. However, concrete has a porous structure, water and ions can permeate into the interior of the concrete through pores of the concrete to cause corrosion to the concrete, and the concrete is a brittle material, so that the concrete is easy to crack and lose efficacy under the action of stress, thereby causing huge economic loss and serious potential safety hazard. Therefore, the protection technology of the concrete structure of the expressway gradually becomes a hot spot problem of people.
Coating protection is one of the most effective protection methods in highway concrete protection. However, the conventional concrete protective material does not have the penetrating property, a coating layer is formed only on the surface of concrete, and the coating layer is easily foamed, cracked and peeled off on the surface of concrete because the coating layer and the concrete are mutually independent two phases. Although some reports about penetrating type coatings exist, the existing penetrating type concrete coating has the disadvantages of shallow penetration depth, low bonding strength, aging resistance and poor chemical corrosion resistance, and the protective coating has limited protective capability and cannot meet the protective requirement in the service environment.
Disclosure of Invention
Aiming at the problems of shallow penetration depth, low bonding strength, aging resistance and poor chemical corrosion resistance of the existing concrete protective coating, the invention provides the concrete protective coating.
The application also provides a preparation method of the concrete protective coating.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the concrete protective coating comprises a penetration primer, an elastic intermediate coat and an elastic top coat, wherein the penetration primer comprises an A component and a B component.
The component A comprises the following raw materials in percentage by mass: 8-12% of silane modified epoxy resin, 45-55% of first epoxy resin, 2-3% of amino resin, 2-3% of silane coupling agent and 30-37% of solvent.
The component B comprises the following raw materials in percentage by mass: 59 to 65 percent of epoxy curing agent, 34 to 40 percent of solvent and 0.8 to 1.2 percent of dibutyl tin dilaurate.
Compared with the prior art, the concrete protective coating composed of the penetration primer, the elastic intermediate paint and the elastic finish paint has excellent penetration-consolidation performance, and can penetrate into the pores of concrete and be solidified and crosslinked, so that capillaries, pores and microcracks formed by a porous medium of the concrete are eliminated, the concrete structure is repaired, the concrete has excellent anti-permeability and anti-corrosion functions, the corrosion of the concrete structure is fundamentally slowed down, and the durability of the concrete structure is improved. Moreover, the concrete protective coating provided by the invention not only can resist the damage of environmental effects to a concrete structure and improve the safe service life of the concrete structure, but also can greatly reduce the environmental damage and energy consumption caused by reconstruction, thereby realizing the sustainable development of high-speed railway infrastructure.
Compared with the prior art, the penetrating primer provided by the invention adopts silane modified epoxy resin, first epoxy resin and amino resin as film forming substances, and the self-crosslinking reaction of the two epoxy resins and the crosslinking reaction between epoxy groups and amino groups in the two epoxy resins are adopted to uniformly crosslink a paint film, and the silane coupling agent is added to fully connect organic groups and inorganic groups, so that the adhesive force and the adhesive strength of the paint are improved. In addition, the addition of the solvent can also improve the permeability of the primer. The penetration primer provided by the invention has the advantages that the penetration primer prepared by the method has strong penetration force, short drying time, higher impact resistance and bonding strength, good flexibility and excellent cupping property, and has good penetration and gap blocking characteristics with the elastic intermediate paint and the elastic finishing paint when being used in combination, so that the degradation of concrete can be effectively relieved, and the durability of the concrete can be improved.
Preferably, the raw materials of the silane modified epoxy resin comprise the following components in parts by weight: 45-55 parts of E51 epoxy resin, 5-10 parts of glycol amine, 10-12 parts of dimethylbenzene, 3-5 parts of butanol, 4-6 parts of absolute ethyl alcohol and 3-5 parts of 3-isocyanatopropyl trimethoxy silane.
Preferably, the preparation method of the silane modified epoxy resin comprises the following steps:
step a: weighing each component according to the designed proportion of the silane modified epoxy resin, uniformly mixing the weighed E51 epoxy resin, glycol amine, xylene and butanol, heating to 37-42 ℃, and stirring for reaction for 3.5-4 hours to obtain a reaction solution;
step b: and (3) adding the weighed 3-isocyanatopropyl trimethoxy silane into the reaction solution, reacting for 3.5-4 hours at 37-42 ℃, cooling to room temperature, adding absolute ethyl alcohol, and uniformly stirring to obtain the silane modified epoxy resin.
The hydroxyl generated by hydrolysis of the self-made silane modified epoxy resin silane, the silicon hydroxyl generated by hydrolysis of the silane coupling agent and the inorganic silicon resin in the concrete are crosslinked and cured, so that the self-made silane modified epoxy resin silane can play a role in permeation reinforcement, and the adhesive force to a base material is improved. In addition, the epoxy groups in the silane modified epoxy resin and the silane coupling agent can be crosslinked and cured with the amino groups in the curing agent, and the silicon-oxygen bond at one end of the silane modified epoxy resin and the silane coupling agent can be crosslinked and cured with the inorganic silicate in the concrete, so that the crosslinking density is further improved, and the solvent resistance and the permeation resistance are further improved.
Preferably, the mass ratio of the component A to the component B is 3.8-4.2:0.9-1.1.
Preferably, the amino resin is 582-2 amino resin.
Preferably, the first epoxy resin is 618 epoxy resin.
Preferably, the silane coupling agent is gamma-glycidyl ether oxypropyl trimethoxy silane.
Further preferably, the silane coupling agent is KH-560.
The silane coupling agent is low in viscosity, low in surface tension and good in permeability, silicon hydroxyl at one end of KH-560 reacts with silicon hydroxyl in silane modified epoxy resin, epoxy at the other end reacts with an epoxy curing agent, and substances such as epoxy resin and solvent can be adsorbed and connected, so that the adhesive property and adhesive force of the coating are greatly improved. And the curing speed of the coating can be accelerated by acting with the components such as polyamide wax, polyethylene wax and the like in the application, so that the impact resistance and the stability of the coating are further improved.
Preferably, the solvent is a mixture of butanol and xylene in a mass ratio of 0.9-1.1:2.0-2.5.
Preferably, the epoxy hardener is winning 2390.
Preferably, the elastic intermediate paint comprises a C component and a D component, wherein the C component comprises the following raw materials in percentage by mass: 10% -15% of plant polyene phenol modified epoxy resin, 40% -45% of second epoxy resin, 0.3% -0.6% of dispersing agent, 0.6% -1% of bentonite, 0.5% -1% of polyamide wax, 8% -12% of titanium pigment, 0.1% -0.2% of carbon black, 8% -12% of wollastonite powder, 13% -18% of mineral fiber powder, 10% -15% of solvent and 0.2% -0.5% of defoamer.
The component D comprises the following raw materials in percentage by mass: 52% -62% of epoxy curing agent, 0.3% -0.6% of dispersing agent, 0.6% -1% of bentonite, 1% -2% of polyamide wax, 8% -10% of sericite powder, 15% -20% of wollastonite powder, 10% -15% of solvent and 0.2% -0.5% of defoaming agent.
According to the elastic intermediate paint provided by the invention, through the self-crosslinking reaction of the plant polyene phenol modified epoxy resin and the second epoxy resin, a paint film can be uniformly and densely crosslinked, through the reaction of epoxy groups in a system and amino groups in polyamide wax, the film forming speed of the paint is increased, the internal structure of the system is enhanced, the prepared elastic intermediate paint has excellent adhesive force and flexibility, the content of non-volatile components is more than 80%, the elongation at break can reach 30%, and the surface strength of concrete can be improved when the elastic intermediate paint is compounded with a penetrating primer and an elastic finishing paint, so that the concrete protective paint has excellent flexibility, weather resistance, ageing resistance and other properties, the durability of a concrete structure is improved, and the service life of the concrete structure is prolonged.
Preferably, the mass ratio of the component C to the component D is 6.7-7.3:0.9-1.1.
Preferably, the plant polyene phenol modified epoxy resin is PLR 602.
Preferably, the second epoxy resin is 601 epoxy resin.
Preferably, the carbon black is a pigment grade carbon black.
Preferably, the bentonite is organic bentonite.
Preferably, the elastic top coat comprises an E component and an F component, wherein the E component comprises the following raw materials in percentage by mass: 40% -45% of hydroxy acrylic resin, 0.5% -0.8% of dispersing agent, 0.3% -0.5% of defoaming agent, 0.5% -1% of polyamide wax, 0.5% -1% of polyethylene wax, 20% -25% of titanium pigment, 0.2% -0.4% of carbon black, 12% -17% of precipitated barium sulfate, 2% -3% of second epoxy resin, 1% -2% of amino resin, 0.4% -0.6% of ultraviolet light absorbent, 1% -2% of silane coupling agent, 0.4% -0.6% of leveling agent, 3% -4% of propylene glycol methyl ether acetate, 4% -5% of butyl ester and 4% -5% of dimethylbenzene.
The component F comprises the following raw materials in percentage by mass: 70-80% of hexamethylene diisocyanate and 20-30% of polyisocyanate curing agent.
The elastic finish paint provided by the invention adopts the hydroxyl acrylic resin and the second epoxy resin as film forming substances, and the film is uniformly and densely crosslinked through self-crosslinking reaction of the second epoxy resin, crosslinking reaction between epoxy groups in the second epoxy resin and carboxyl groups in the hydroxyl acrylic resin and polymerization reaction between acrylic groups, so that the adhesive force and corrosion resistance of the paint are improved, the film forming rate is accelerated through amino reaction between epoxy groups and amino resins in the system, the internal structure and impact resistance of the system are enhanced, the active ingredients in the elastic finish paint are protected from being affected by ultraviolet rays through adding the ultraviolet light absorber, and the ageing resistance of the paint film is greatly prolonged.
The components of the elastic finishing paint provided by the invention have synergistic effect, so that the prepared elastic finishing paint film has low water absorption rate, high viscosity, strong impact resistance and high flexibility, the temperature resistance can reach more than 10 times, the elongation at break is high, the flexibility is good, and the elastic finishing paint can be used in combination with the penetration primer and the elastic intermediate paint, so that the concrete paint has excellent weather resistance, high and low temperature resistance, chemical corrosion resistance and other performances, the multifunctional integrated requirement of the concrete protective material is realized, and the safe service life of a concrete structure is further prolonged.
Preferably, the mass ratio of the E component to the F component is 4.8-5.2:0.9-1.1.
Preferably, the hydroxy acrylic resin is HU56020 by Shanghai.
Preferably, the second epoxy resin is 601 epoxy resin.
Preferably, the fineness of the wollastonite powder is 800-1000 meshes.
The invention also provides a preparation method of the concrete protective coating, which comprises the preparation of the penetration primer, the elastic intermediate paint and the elastic finishing paint.
Preferably, the preparation method of the penetration primer comprises the following steps: weighing all raw materials according to the design proportion of the component A and the component B, and uniformly mixing all the weighed raw materials of the component A to obtain the component A; and uniformly mixing the weighed raw materials of the component B to obtain the component B.
Preferably, the preparation method of the elastic intermediate paint comprises the following steps: weighing all the raw materials according to the designed proportion of the component C and the component D, uniformly mixing the weighed raw materials of the component C, and grinding to obtain the component C; and uniformly mixing the weighed raw materials of the component D, and grinding to obtain the component D.
Preferably, the grinding fineness in the preparation method of the elastic intermediate paint is less than or equal to 70 mu m.
Preferably, the preparation method of the elastic finishing paint comprises the following steps: weighing all raw materials according to the designed proportion of the E component and the F component respectively, uniformly mixing the weighed raw materials of the E component, and grinding to obtain the E component; and uniformly mixing the weighed raw materials of the component F, and grinding to obtain the component F.
Preferably, the grinding fineness of the elastic finishing paint in the preparation method is less than or equal to 25 mu m.
The preparation method provided by the invention is simple to operate, does not have complex procedures, does not need special equipment, is low in cost, is suitable for industrialized large-scale production, and has wide market prospect and development potential.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
The embodiment of the invention provides silane modified epoxy resin, which comprises the following raw materials in parts by weight: 45 parts of E51 epoxy resin, 10 parts of glycol amine, 10 parts of xylene, 3 parts of butanol, 4 parts of absolute ethyl alcohol and 5 parts of 3-isocyanatopropyl trimethoxysilane.
The preparation method of the silane modified epoxy resin comprises the following steps:
step a: weighing each component according to the designed proportion of the silane modified epoxy resin, uniformly mixing the weighed E51 epoxy resin, glycol amine, xylene and butanol, heating to 37 ℃, and stirring for reaction for 4 hours to obtain a reaction solution;
step b: and (3) adding the weighed 3-isocyanatopropyl trimethoxy silane into the reaction solution, reacting for 3.5 hours at 37 ℃, cooling to room temperature, adding absolute ethyl alcohol, and uniformly stirring to obtain the silane modified epoxy resin.
Example 2
The embodiment of the invention provides silane modified epoxy resin, which comprises the following raw materials in parts by weight: 55 parts of E51 epoxy resin, 5 parts of glycol amine, 12 parts of xylene, 5 parts of butanol, 6 parts of absolute ethyl alcohol and 3 parts of 3-isocyanatopropyl trimethoxysilane.
The preparation method of the silane modified epoxy resin comprises the following steps:
step a: weighing each component according to the designed proportion of the silane modified epoxy resin, uniformly mixing the weighed E51 epoxy resin, glycol amine, xylene and butanol, heating to 42 ℃, and stirring for reaction for 3.5 hours to obtain a reaction solution;
step b: and adding the weighed 3-isocyanatopropyl trimethoxy silane into the reaction liquid, reacting for 4 hours at 42 ℃, cooling to room temperature, adding absolute ethyl alcohol, and uniformly stirring to obtain the silane modified epoxy resin.
Example 3
The embodiment of the invention provides a penetration primer in a concrete protective coating, which comprises an A component and a B component.
The component A comprises the following raw materials in percentage by mass: 12% of silane modified epoxy resin, 45% of 618 epoxy resin, 3% of amino resin, 3% of silane coupling agent and 37% of solvent.
The component B comprises the following raw materials in percentage by mass: 59% of epoxy curing agent, 39.8% of solvent and 1.2% of dibutyl tin dilaurate.
The silane modified epoxy resin is prepared in the embodiment 1, the silane coupling agent is KH-560, and the solvent is a mixture of butanol and dimethylbenzene in a mass ratio of 0.9:2.5.
The preparation steps of the penetrating primer are as follows:
step a, weighing each component according to the design proportion of the component A, and uniformly mixing the weighed silane modified epoxy resin, 618 epoxy resin, amino resin, silane coupling agent and solvent to obtain the component A;
and B, weighing all the components according to the designed proportion of the component B, and uniformly mixing the weighed epoxy curing agent, solvent and dibutyltin dilaurate to obtain the component B.
When the composition is specifically used, the mass ratio of the component A to the component B is 3.8:0.9.
example 4
The embodiment of the invention provides a penetration primer in a concrete protective coating, which comprises an A component and a B component.
The component A comprises the following raw materials in percentage by mass: 8% of silane modified epoxy resin, 55% of 618 epoxy resin, 2% of amino resin, 2% of silane coupling agent and 33% of solvent.
The component B comprises the following raw materials in percentage by mass: 65% of epoxy curing agent, 34.2% of solvent and 0.8% of dibutyl tin dilaurate.
The silane modified epoxy resin is prepared in the embodiment 2, the silane coupling agent is KH-560, and the solvent is a mixture of butanol and dimethylbenzene in a mass ratio of 1.1:2.0.
The preparation steps of the penetrating primer are as follows:
step a, weighing each component according to the design proportion of the component A, and uniformly mixing the weighed silane modified epoxy resin, 618 epoxy resin, amino resin, silane coupling agent and solvent to obtain the component A;
and B, weighing all the components according to the designed proportion of the component B, and uniformly mixing the weighed epoxy curing agent, solvent and dibutyltin dilaurate to obtain the component B.
When the composition is specifically used, the mass ratio of the component A to the component B is 4.2:1.1.
example 5
The embodiment of the invention provides elastic intermediate paint in concrete protective paint, which comprises a component C and a component D.
The component C comprises the following raw materials in percentage by mass: 14.5% of plant polyene phenol modified epoxy resin, 40% of 601 epoxy resin, 0.3% of dispersing agent, 1% of organic bentonite, 0.5% of polyamide wax, 12% of titanium pigment, 0.2% of pigment-grade carbon black, 8% of wollastonite powder, 13% of mineral fiber powder, 10% of solvent and 0.5% of defoamer.
The component D comprises the following raw materials in percentage by mass: 57.6% of epoxy curing agent, 0.6% of dispersing agent, 0.6% of organic bentonite, 1% of polyamide wax, 10% of sericite powder, 15% of wollastonite powder, 15% of solvent and 0.2% of defoamer.
Wherein the solvent is a mixture of butanol and dimethylbenzene in a mass ratio of 1.1:2.4.
The preparation steps of the elastic intermediate paint are as follows:
step a, weighing all components according to the designed proportion of the component C, uniformly mixing the weighed plant polyene phenol modified epoxy resin, 601 epoxy resin, dispersing agent, organic bentonite, polyamide wax, titanium pigment, pigment-grade carbon black, wollastonite powder, mineral fiber powder, solvent and defoamer, and grinding until the fineness is less than or equal to 70 mu m to obtain the component C;
and b, weighing the components according to the design proportion of the component D, uniformly mixing the weighed epoxy curing agent, dispersing agent, organic bentonite, polyamide wax, sericite powder, wollastonite powder, solvent and defoamer, and grinding until the fineness is less than or equal to 70 mu m to obtain the component D.
When the composition is specifically used, the mass ratio of the component C to the component D is 6.7:0.9.
example 6
The embodiment of the invention provides elastic intermediate paint in concrete protective paint, which comprises a component C and a component D.
The component C comprises the following raw materials in percentage by mass: 10% of plant polyene phenol modified epoxy resin, 44.5% of 601 epoxy resin, 0.6% of dispersing agent, 0.6% of organic bentonite, 1% of polyamide wax, 8% of titanium pigment, 0.1% of pigment-grade carbon black, 8% of wollastonite powder, 13% of mineral fiber powder, 14% of solvent and 0.2% of defoamer.
The component D comprises the following raw materials in percentage by mass: 62% of epoxy curing agent, 0.3% of dispersing agent, 1.0% of organic bentonite, 2% of polyamide wax, 8% of sericite powder, 16.2% of wollastonite powder, 10% of solvent and 0.5% of defoamer.
Wherein the solvent is a mixture of butanol and dimethylbenzene in a mass ratio of 0.9:2.3.
The preparation steps of the elastic intermediate paint are as follows:
step a, weighing all components according to the designed proportion of the component C, uniformly mixing the weighed plant polyene phenol modified epoxy resin, 601 epoxy resin, dispersing agent, organic bentonite, polyamide wax, titanium pigment, pigment-grade carbon black, wollastonite powder, mineral fiber powder, solvent and defoamer, and grinding until the fineness is less than or equal to 70 mu m to obtain the component C;
and b, weighing the components according to the design proportion of the component D, uniformly mixing the weighed epoxy curing agent, dispersing agent, organic bentonite, polyamide wax, sericite powder, wollastonite powder, solvent and defoamer, and grinding until the fineness is less than or equal to 70 mu m to obtain the component D.
When the composition is specifically used, the mass ratio of the component C to the component D is 7.3:1.1.
example 7
The embodiment of the invention provides elastic intermediate paint in concrete protective paint, which comprises a component C and a component D.
The component C comprises the following raw materials in percentage by mass: 10% of plant polyene phenol modified epoxy resin, 40% of 601 epoxy resin, 0.3% of dispersing agent, 0.6% of organic bentonite, 0.5% of polyamide wax, 8% of titanium pigment, 0.1% of pigment-grade carbon black, 12% of wollastonite powder, 18% of mineral fiber powder, 10.3% of solvent and 0.2% of defoamer.
The component D comprises the following raw materials in percentage by mass: 52% of epoxy curing agent, 0.5% of dispersing agent, 0.7% of organic bentonite, 1.5% of polyamide wax, 9.8% of sericite powder, 20% of wollastonite powder, 15% of solvent and 0.5% of defoamer.
Wherein the solvent is a mixture of butanol and dimethylbenzene in a mass ratio of 1.0:2.1.
The preparation steps of the elastic intermediate paint are as follows:
step a, weighing all components according to the designed proportion of the component C, uniformly mixing the weighed plant polyene phenol modified epoxy resin, 601 epoxy resin, dispersing agent, organic bentonite, polyamide wax, titanium pigment, pigment-grade carbon black, wollastonite powder, mineral fiber powder, solvent and defoamer, and grinding until the fineness is less than or equal to 70 mu m to obtain the component C;
and b, weighing the components according to the design proportion of the component D, uniformly mixing the weighed epoxy curing agent, dispersing agent, organic bentonite, polyamide wax, sericite powder, wollastonite powder, solvent and defoamer, and grinding until the fineness is less than or equal to 70 mu m to obtain the component D.
When the composition is specifically used, the mass ratio of the component C to the component D is 7:1.
example 8
The embodiment of the invention provides an elastic finishing paint in concrete protective paint, which comprises an E component and an F component.
The component E comprises the following raw materials in percentage by mass: 42.3% of hydroxy acrylic resin, 0.5% of dispersing agent, 0.3% of defoaming agent, 0.5% of polyamide wax, 1% of polyethylene wax, 20% of titanium pigment, 0.4% of pigment grade carbon black, 17% of precipitated barium sulfate, 3% of 601 epoxy resin, 1% of amino resin, 0.4% of ultraviolet light absorbent, 1% of silane coupling agent, 0.6% of leveling agent, 3% of propylene glycol methyl ether acetate, 4% of butyl ester and 5% of dimethylbenzene.
The component F comprises the following raw materials in percentage by mass: 70% of hexamethylene diisocyanate and 30% of polyisocyanate curing agent.
The preparation steps of the elastic finishing paint are as follows:
step a, weighing all components according to the designed proportion of the finish paint, uniformly mixing the weighed hydroxy acrylic resin, dispersant, defoamer, polyamide wax, polyethylene wax, titanium pigment, pigment-grade carbon black, precipitated barium sulfate, 601 epoxy resin, amino resin, ultraviolet light absorbent, silane coupling agent, leveling agent, propylene glycol methyl ether acetate, butyl ester and xylene, and grinding until the fineness is less than or equal to 25 mu m to obtain the component E;
and b, weighing all the components according to the design proportion of the finishing paint curing agent, uniformly mixing the weighed hexamethylene diisocyanate and polyisocyanate curing agent, and grinding until the fineness is less than or equal to 25 mu m to obtain the component F.
When the composition is specifically used, the mass ratio of the component E to the component F is 4.8:1.1.
example 9
The embodiment of the invention provides an elastic finishing paint in concrete protective paint, which comprises an E component and an F component.
The component E comprises the following raw materials in percentage by mass: 40% of hydroxy acrylic resin, 0.8% of dispersing agent, 0.5% of defoaming agent, 1% of polyamide wax, 0.5% of polyethylene wax, 25% of titanium pigment, 0.2% of pigment grade carbon black, 12% of precipitated barium sulfate, 2% of 601 epoxy resin, 2% of amino resin, 0.6% of ultraviolet light absorbent, 2% of silane coupling agent, 0.4% of leveling agent, 4% of propylene glycol methyl ether acetate, 5% of butyl ester and 4% of dimethylbenzene.
The component F comprises the following raw materials in percentage by mass: 80% of hexamethylene diisocyanate and 20% of polyisocyanate curing agent.
The preparation steps of the elastic finishing paint are as follows:
step a, weighing all components according to the designed proportion of the finish paint, uniformly mixing the weighed hydroxy acrylic resin, dispersant, defoamer, polyamide wax, polyethylene wax, titanium pigment, pigment-grade carbon black, precipitated barium sulfate, 601 epoxy resin, amino resin, ultraviolet light absorbent, silane coupling agent, leveling agent, propylene glycol methyl ether acetate, butyl ester and xylene, and grinding until the fineness is less than or equal to 25 mu m to obtain the component E;
and b, weighing all the components according to the design proportion of the finishing paint curing agent, uniformly mixing the weighed hexamethylene diisocyanate and polyisocyanate curing agent, and grinding until the fineness is less than or equal to 25 mu m to obtain the component F.
When the composition is specifically used, the mass ratio of the component E to the component F is 5.2:0.9.
example 10
The embodiment of the invention provides an elastic finishing paint in concrete protective paint, which comprises an E component and an F component.
The component E comprises the following raw materials in percentage by mass: 45% of hydroxy acrylic resin, 0.8% of dispersing agent, 0.5% of defoaming agent, 1% of polyamide wax, 0.5% of polyethylene wax, 21% of titanium pigment, 0.2% of pigment grade carbon black, 12% of precipitated barium sulfate, 2% of 601 epoxy resin, 1% of amino resin, 0.6% of ultraviolet light absorbent, 2% of silane coupling agent, 0.4% of leveling agent, 4% of propylene glycol methyl ether acetate, 4% of butyl ester and 4% of dimethylbenzene.
The component F comprises the following raw materials in percentage by mass: 75% of hexamethylene diisocyanate and 25% of polyisocyanate curing agent.
The preparation steps of the elastic finishing paint are as follows:
step a, weighing all components according to the designed proportion of the finish paint, uniformly mixing the weighed hydroxy acrylic resin, dispersant, defoamer, polyamide wax, polyethylene wax, titanium pigment, pigment-grade carbon black, precipitated barium sulfate, 601 epoxy resin, amino resin, ultraviolet light absorbent, silane coupling agent, leveling agent, propylene glycol methyl ether acetate, butyl ester and xylene, and grinding until the fineness is less than or equal to 25 mu m to obtain the component E;
and b, weighing all the components according to the design proportion of the finishing paint curing agent, uniformly mixing the weighed hexamethylene diisocyanate and polyisocyanate curing agent, and grinding until the fineness is less than or equal to 25 mu m to obtain the component F.
When the composition is specifically used, the mass ratio of the component E to the component F is 5:1.
comparative example 1
The comparative example of the present invention provides a concrete protective primer, wherein the silane modified epoxy resin in example 3 is replaced by bisphenol a epoxy resin, and the rest components and the preparation method are the same as those in example 3, and are not repeated.
In order to better show the characteristics of the concrete protective coating prepared in the embodiment of the invention, the primers prepared in the embodiments 3-4 and the comparative example 1 are subjected to performance test, and the detection results are shown in table 1.
TABLE 1 results of performance tests of the primers prepared in examples 3-4 and comparative example 1
| Project | Example 3 | Example 4 | Comparative example 1 | Detection standard |
| State in a container | Homogeneous liquid | Homogeneous liquid | Homogeneous liquid | Visual inspection |
| Viscosity (coating-4 # cup)(s) | 35 | 30 | 65 | GB/T 1723 |
| Time of surface dry (h) | 1 | 1 | 1.5 | GB/T 1728 |
| Time of actual drying (h) | 6 | 6 | 8 | GB/T 1728 |
| Impact resistance (kg cm) | 50 | 57 | 43 | GB/T 1732 |
| Cup (mm) | 10 | 11 | 7 | GB/T 9753 |
| Flexibility (mm) | 1 | 1 | 2 | GB/T 1731 |
| Bond Strength (MPa) | 5 | 5.5 | 3.6 | GB50212-2014 (pulling method) |
| Penetration depth (mm) | 3 | 3.5 | 1.8 | JG/T337-2011 |
As can be seen from Table 1, the penetration primer provided by the invention has the advantages of strong penetration force, short drying time, high impact resistance and bonding strength, good flexibility and excellent cupping performance.
The elastic intermediate paint prepared in example 5 was subjected to performance test, and the test results are shown in table 2.
TABLE 2 results of Performance test of elastic intermediate paint prepared in example 5
| Project | Example 5 | Detection standard |
| State in a container | No hard block and in uniform state | Visual inspection |
| Fineness (mu m) | 70 | GB/T 1724 |
| Non-volatile component content (%) | 82 | GB/T 1725 |
| Time of surface dry (h) | 2 | GB/T 1728 |
| Experiment time (h) | 12 | GB/T 1728 |
| Flexibility (mm) | 1 | GB/T 1731 |
| Adhesion (grade) | 1 | GB/T9286 (cross-cut method) |
| Elongation at break (%) | 30 | GB/T 528 |
The elastic intermediate paint prepared in examples 6-7 has the performance test result equivalent to that of example 5, and the test result of the elastic intermediate paint shows that the elastic intermediate paint provided by the invention has excellent adhesive force and flexibility, the nonvolatile component content is more than 80%, the elongation at break can reach 30%, and the surface strength of concrete can be improved when the elastic intermediate paint is used in combination with the penetrating primer and the elastic finishing paint, so that the protective paint of the concrete has excellent flexibility, weather resistance, ageing resistance and other properties, the durability of the concrete structure is improved, and the service life of the concrete structure is prolonged.
The elastic top coat prepared in example 8 was subjected to performance test, and the test results are shown in table 3.
TABLE 3 results of Performance test of elastomeric topcoat prepared in example 8
The elastic finish paint prepared in examples 9-10 has the performance test results equivalent to those of example 8, and the test results of the elastic finish paint show that the elastic finish paint film provided by the invention has the advantages of low water absorption, high viscosity, strong impact resistance, high temperature resistance, high elongation at break and good flexibility, and can be used in combination with the penetrating primer and the elastic intermediate paint to ensure that the concrete paint has excellent weather resistance, high and low temperature resistance, chemical corrosion resistance and other performances, thereby realizing the multifunctional integrated requirement of the concrete protective material and further improving the safe service life of the concrete structure.
The primers prepared in examples 3 to 4 and comparative example 1 were respectively combined with the elastic intermediate paint prepared in example 5 and the elastic top paint prepared in example 6 to obtain concrete protective coatings, which were respectively designated as coating a, coating B and coating C, and the properties of the obtained concrete protective coatings were tested, and the test results are shown in table 4.
The composite mode of the concrete protective coating is that the penetrating primer is sprayed firstly, and then the elastic intermediate paint and the elastic finishing paint are sprayed in sequence. The detection standard is GB 9274-1988.
Table 4 results of performance test of concrete protective coating
The penetrating primer, the elastic intermediate paint and the elastic finishing paint prepared by the embodiment of the application are compounded by a matched system at will, and the performance test result is equivalent to that of the paint A and the paint B. Therefore, the concrete protective coating provided by the invention combines the performance characteristics of the penetration primer, the elastic intermediate paint and the elastic finishing paint, has great advantages in chemical corrosion resistance, has strong bonding strength, excellent artificial aging resistance and excellent chloride ion permeation resistance, can effectively relieve concrete degradation, improves various performances such as durability and the like of the concrete, realizes the requirement of multifunctional integration of the concrete protective material, and further improves the safe service life of a concrete structure.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.
Claims (7)
1. The concrete protective coating is characterized by comprising a penetration primer, an elastic intermediate coat and an elastic finish; wherein the penetration primer comprises an A component and a B component;
the component A comprises the following raw materials in percentage by mass: 8-12% of silane modified epoxy resin, 45-55% of first epoxy resin, 2-3% of amino resin, 2-3% of silane coupling agent and 30-37% of solvent;
the component B comprises the following raw materials in percentage by mass: 59% -65% of epoxy curing agent, 34% -40% of solvent and 0.8% -1.2% of dibutyl tin dilaurate;
the raw materials of the silane modified epoxy resin comprise the following components in parts by weight: 45-55 parts of E51 epoxy resin, 5-10 parts of glycol amine, 10-12 parts of dimethylbenzene, 3-5 parts of butanol, 4-6 parts of absolute ethyl alcohol and 3-5 parts of 3-isocyanatopropyl trimethoxy silane;
the silane coupling agent is gamma-glycidol ether oxygen propyl trimethoxy silane; the amino resin is 582-2 amino resin; the first epoxy resin is 618 epoxy resin; the epoxy curing agent is Yingzhuang 2390;
the elastic intermediate paint comprises a C component and a D component; the component C comprises the following raw materials in percentage by mass: 10% -15% of plant polyene phenol modified epoxy resin, 40% -45% of second epoxy resin, 0.3% -0.6% of dispersing agent, 0.6% -1% of bentonite, 0.5% -1% of polyamide wax, 8% -12% of titanium dioxide, 0.1% -0.2% of carbon black, 8% -12% of wollastonite powder, 13% -18% of mineral fiber powder, 10% -15% of solvent and 0.2% -0.5% of defoamer;
the component D comprises the following raw materials in percentage by mass: 52-62% of epoxy curing agent, 0.3-0.6% of dispersing agent, 0.6-1% of bentonite, 1-2% of polyamide wax, 8-10% of sericite powder, 15-20% of wollastonite powder, 10-15% of solvent and 0.2-0.5% of defoamer;
the elastic top coat comprises an E component and an F component; the component E comprises the following raw materials in percentage by mass: 40% -45% of hydroxy acrylic resin, 0.5% -0.8% of dispersing agent, 0.3% -0.5% of defoaming agent, 0.5% -1% of polyamide wax, 0.5% -1% of polyethylene wax, 20% -25% of titanium pigment, 0.2% -0.4% of carbon black, 12% -17% of precipitated barium sulfate, 2% -3% of second epoxy resin, 1% -2% of amino resin, 0.4% -0.6% of ultraviolet light absorbent, 1% -2% of silane coupling agent, 0.4% -0.6% of leveling agent, 3% -4% of propylene glycol methyl ether acetate, 4% -5% of butyl ester and 4% -5% of dimethylbenzene;
the component F comprises the following raw materials in percentage by mass: 70-80% of hexamethylene diisocyanate and 20-30% of polyisocyanate curing agent.
2. The concrete protective coating of claim 1, wherein the method of preparing the silane modified epoxy resin comprises the steps of:
step a: weighing each component according to the designed proportion of the silane modified epoxy resin, uniformly mixing the weighed E51 epoxy resin, glycol amine, xylene and butanol, heating to 37-42 ℃, and stirring for reaction for 3.5-4 hours to obtain a reaction solution;
step b: and (3) adding the weighed 3-isocyanatopropyl trimethoxy silane into the reaction solution, reacting for 3.5-4 hours at 37-42 ℃, cooling to room temperature, adding absolute ethyl alcohol, and uniformly stirring to obtain the silane modified epoxy resin.
3. The concrete protective coating as claimed in claim 1, wherein the mass ratio of the A component to the B component is 3.8-4.2:0.9-1.1; and/or
The mass ratio of the solvent is 0.9-1.1:2.0-2.5 butanol and xylene.
4. The concrete protective coating as claimed in claim 1, wherein the mass ratio of the C component to the D component is 6.7-7.3:0.9-1.1; and/or the plant polyene phenol modified epoxy resin is PLR 602; and/or
The second epoxy resin is 601 epoxy resin; and/or
The carbon black is pigment grade carbon black; and/or
The bentonite is organic bentonite.
5. The concrete protective coating as claimed in claim 1, wherein the mass ratio of the E component to the F component is 4.8-5.2:0.9-1.1; and/or
The hydroxy acrylic resin is HU56020 by Shanghai; and/or
The second epoxy resin is 601 epoxy resin; and/or
The fineness of wollastonite powder is 800-1000 meshes.
6. A method of preparing a concrete protective coating according to any one of claims 1 to 5, comprising the preparation of the penetration primer, the elastic intermediate paint and the elastic topcoat;
the preparation method of the penetrating primer comprises the following steps: weighing all raw materials according to the design proportion of the component A and the component B, and uniformly mixing all the weighed raw materials of the component A to obtain the component A; uniformly mixing the weighed raw materials of the component B to obtain the component B;
the preparation method of the elastic intermediate paint comprises the following steps: weighing all the raw materials according to the designed proportion of the component C and the component D, uniformly mixing the weighed raw materials of the component C, and grinding to obtain the component C; uniformly mixing the weighed raw materials of the component D, and grinding to obtain the component D;
the preparation method of the elastic finishing paint comprises the following steps: weighing all raw materials according to the designed proportion of the E component and the F component respectively, uniformly mixing the weighed raw materials of the E component, and grinding to obtain the E component; and uniformly mixing the weighed raw materials of the component F, and grinding to obtain the component F.
7. The method for preparing a protective coating for concrete according to claim 6, wherein the fineness of grind in the method for preparing the elastic intermediate paint is not more than 70 μm;
the grinding fineness of the elastic finishing paint in the preparation method is less than or equal to 25 mu m.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103031047A (en) * | 2012-12-12 | 2013-04-10 | 澳达树熊涂料(惠州)有限公司 | Scratch-resistant double-component polyurethane high-gloss black finish paint and preparation method thereof |
| CN108676457A (en) * | 2018-04-27 | 2018-10-19 | 青岛太平洋水下科技工程有限公司 | Underwater concrete tough epoxy anticorrosive paint and preparation method thereof |
| CN112898868A (en) * | 2021-01-22 | 2021-06-04 | 沈阳美狮化工有限公司 | Super wear-resistant paint for floor decoration and preparation method thereof |
| CN113045919A (en) * | 2021-03-23 | 2021-06-29 | 石家庄市油漆厂 | Low-temperature curing high-solid epoxy coating and preparation method thereof |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103031047A (en) * | 2012-12-12 | 2013-04-10 | 澳达树熊涂料(惠州)有限公司 | Scratch-resistant double-component polyurethane high-gloss black finish paint and preparation method thereof |
| CN108676457A (en) * | 2018-04-27 | 2018-10-19 | 青岛太平洋水下科技工程有限公司 | Underwater concrete tough epoxy anticorrosive paint and preparation method thereof |
| CN112898868A (en) * | 2021-01-22 | 2021-06-04 | 沈阳美狮化工有限公司 | Super wear-resistant paint for floor decoration and preparation method thereof |
| CN113045919A (en) * | 2021-03-23 | 2021-06-29 | 石家庄市油漆厂 | Low-temperature curing high-solid epoxy coating and preparation method thereof |
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