CN102533053B - Environmental-friendly waterborne epoxy zinc phosphate anti-corrosion paint for steel structures and preparation method thereof - Google Patents
Environmental-friendly waterborne epoxy zinc phosphate anti-corrosion paint for steel structures and preparation method thereof Download PDFInfo
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- CN102533053B CN102533053B CN201110450117.6A CN201110450117A CN102533053B CN 102533053 B CN102533053 B CN 102533053B CN 201110450117 A CN201110450117 A CN 201110450117A CN 102533053 B CN102533053 B CN 102533053B
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Abstract
The invention belongs to the technical field of paint and particularly relates to environmental-friendly waterborne epoxy zinc phosphate anti-corrosion paint for steel structures and a preparation method of the environmental-friendly waterborne epoxy zinc phosphate anti-corrosion paint. The paint comprises an ingredient A and an ingredient B and is characterized in that the ingredient A consists of 25 to 40 weight parts of waterborne epoxy emulsion, 10 to 20 weight parts of rust-proof pigment, 5 to 15 weight parts of precipitated barium sulfate, 5 to 10 weight parts of mica powder, 5 to 10 weight parts of pigment, 0.5 to 2 weight parts of dispersing agents and 10 to 30 weight parts of water, and the ingredient B consists of 5 to 15 weight parts of curing agents, 1 to 5 weight parts of cosolvents and 3 to 8 weight parts of water, wherein the rust-proof pigment is compounded by zinc phosphate and aluminum triphosphate according to the weight ratio of 1:3, and the ingredient A and the ingredient B are mixed according to the weight ratio of 8:1. The paint belongs to the anti-corrosion paint with anti-corrosion and environmental-friendly effects in the field of the steel structures.
Description
Technical field
The invention belongs to technical field of coatings, particularly environment-friendly type aqueous epoxy phosphate zinc protective system and preparation method for a kind of steel construction.
Background technology
At present, in steel structure anti-corrosion field, iron and steel adopts solvent based coating substantially with anticorrosive coating.Particularly being widely used of solvent epoxy varnish, causes very large harm to environment and human body.Along with the raising day by day to environmental protection requirement, epoxy coating has turned to the solvent-borne formulation of low VOC from high VOC solvent-borne formulation.In order to reduce the discharge of objectionable impurities, the research and development steel construction use epoxy resin anticorrosive coating trend that is inevitable.
The R&D process of aqueous epoxy resins has been passed through 3 stages.
First-generation product is directly to carry out emulsification with emulsifying agent, under violent mechanical stirring, obtains emulsion particle, and the emulsion particle diameter obtaining is like this thicker, causes film forming difficulty; And in emulsion, exist free emulsifying agent, and while meeting water, can from film, separate out, cause water-resistance property of coating bad, thereby restricted its application.
S-generation water-base epoxy is water soluble solid agent oil in water emulsion dissolubility epoxy resin, the feature of this class aqueous epoxy resin systems is that the solidifying agent using is all water miscible, when two components are when mixing cured, the curative concentration that solidifying agent diffuses into resin particle surface from water is higher, make resin surface easily solidify to form duricrust, stop the film forming of resin particle, finally make resin in paint film and solidifying agent affect film performance because of skewness, therefore not mate be to affect the important factor that s-generation water-borne epoxy systems is promoted to solubility parameters.The another kind of form of s-generation water-borne epoxy systems is resin to be made to the epoxy emulsion of aqueous dispersion type, and this system exists solubility parameters mismatch problem equally.Because epoxy resin is hydrophobic, and water miscible solidifying agent has very strong wetting ability, two components owing to existing great difference aspect hydrophilic and hydrophobicity, thereby have affected the film-forming properties of coating after mixing.
Third generation aqueous epoxy resins is the eighties of last century nineties, researchs and develops successful by Shell company of the U.S. through for many years.Its epoxy resin and solidifying agent have all connected nonionic surface active agent.After two components mix, solubility parameters is close, and matching is good, after solidifying, obtains uniform film, obtains good physical and mechanical property, chemical resistance, electrical insulation properties and adhesive property.
Aqueous epoxide resin paint is mainly used in following field at present: (1) concrete, cement flooring seal coat.Aqueous epoxy coating is constructed in concrete surface, and concrete surface is had to good sticking power, and can prevent the accumulation of salt in the surface soil, and simultaneously water-base epoxy film has ventilation property, and has Permeable characteristic, can overcome the problem that concrete, cement flooring get damp.(2) industry ground slab coating.Aqueous epoxy coating smell is little, wear resistance good, and coatingsurface is easy to clean, and is specially adapted to hospital, food factory, supermarket, dairy plant and Cosmetics Plant etc. and need to keeps low VOC and highly clean place.(3) wood lacquer field.The aqueous epoxy coating adopting is bicomponent system, has higher hardness and good scoring resistance after curing of coating, is made into varnish and can be used for wood floors, substitutes widely used solvent borne polyurethane crystal like floor paint and polyester furniture paint etc. in the market.
But aqueous epoxide resin paint does not also have product application in steel structure anti-corrosion field, utilize physical and mechanical property, chemical resistance, electrical insulation properties and adhesive property that aqueous epoxy resins is good, the industrial antisepsis of preparing taking it as base-material erosion coating has huge development prospect in iron structure field.
Summary of the invention
The object of the present invention is to provide environment-friendly type aqueous epoxy phosphate zinc protective system and preparation method for a kind of steel construction, mainly solve the existing technical problem of above-mentioned prior art, it is the anticorrosive coating at field of steel structure with protection against corrosion, environmentally friendly type.
For achieving the above object, the present invention realizes like this.
A kind of environment-friendly type aqueous epoxy phosphate zinc protective system for steel construction, it has A, B two components; It is characterized in that: described A component is made up of aqueous epoxy emulsion 25-40 weight part, rust-stabilising pigment 10-20 weight part, process white 5-15 weight part, mica powder 5-10 weight part, pigment 5-10 weight part, dispersion agent 0.5-2 weight part and water 10-30 weight part; B component is made up of solidifying agent 5-15 weight part, solubility promoter 1-5 and water 3-8 weight part; Wherein: described rust-stabilising pigment is that zinc phosphate and aluminium triphosphate are composite, and weight proportion is 1:3; Described A, B two components are mixed according to the ratio of weight ratio 8:1.
Environment-friendly type aqueous epoxy phosphate zinc protective system for described steel construction, is characterized in that: described dispersion agent is special modified polycarboxylic acid sylvite.
Environment-friendly type aqueous epoxy phosphate zinc protective system for described steel construction, is characterized in that: described pigment is the pigment with opacifying power.
Environment-friendly type aqueous epoxy phosphate zinc protective system for described steel construction, is characterized in that: described pigment is titanium dioxide or iron oxide red mill base.
Environment-friendly type aqueous epoxy phosphate zinc protective system for described steel construction, is characterized in that: described aqueous epoxy emulsion is liquid or solid epoxy resin dispersion.
Environment-friendly type aqueous epoxy phosphate zinc protective system for described steel construction, is characterized in that: described solidifying agent is the fatty amine aqueous dispersion carrying out after end-blocking, addition.
Environment-friendly type aqueous epoxy phosphate zinc protective system for described steel construction, is characterized in that: described solubility promoter is DPnB, DPM or propylene glycol monomethyl ether.
The preparation method of environment-friendly type aqueous epoxy phosphate zinc protective system for a kind of steel construction as above, it is characterized in that: concrete steps are, (1) A component preparation: use high speed dispersor under 500-1500r/min rotating speed, add successively water, rust-stabilising pigment, process white, mica powder, pigment, dispersion agent, blending dispersion to fineness reaches the following form slurry of 70 order, then under 500r/min-800r/min stir speed (S.S.), add aqueous epoxy emulsion, stir, slaking, obtains A component after filtration; (2) B component preparation: under high speed dispersor, solidifying agent, solubility promoter, water are mixed in proportion; (3) A, B two components are mixed according to the ratio of mass ratio 8:1, in container, mix, obtain environment-friendly type aqueous epoxy phosphate zinc anticorrosive coating for steel construction.
The performance of gained coating is as follows:
Time of drying surface drying/h 1
Do solid work/h≤24
Shock resistance/kgcm 50
Sticking power/level 1
Snappiness/mm 1
Pencil hardness/H 2
Salt water resistance (3%NaCl) 1000h is without extremely.
The environment-friendly type aqueous epoxy phosphate zinc anticorrosive coating for steel construction of the present invention's development, there is acid and alkali-resistance, oils, chemical mediator and have good sticking power with steel substrate, this coating is using water as dispersion medium simultaneously, odorlessness, do not fire, easily store, transport, greatly improved the security of coating use procedure.Material therefor of the present invention is the commercially available prod that is easy to buy, and can not restrict the suitability for industrialized production of environment-friendly type aqueous epoxy phosphate zinc anticorrosive coating.
The steel construction of the present invention's development is with in environment-friendly type aqueous epoxy phosphate zinc anticorrosive coating formula, and the selection of rust-stabilising pigment and consumption are related to the Corrosion Protection of coating.In the present invention, select zinc phosphate [Zn
3(PO
4)
2] and aluminium triphosphate (AlH
2p
3o
102H
2o) the best of 1:3 is composite, the phosphate ion that zinc phosphate hydrolysis is generated, the Fe of it and metallic surface
3+form the zinc iron phosphate complex compound Fe[Zn of adhere firmly
3(PO
4)
3] beds of precipitation suppress anodic reaction (anodic polarization); The OH in zine ion and cathodic area
-reaction, generates the very little zinc hydroxide of solvability or basic zinc salt and plays cathodic polarization effect; Condensed phosphate tripolymer is to Fe
3+there is very strong complex ability, tripolyphosphate radical ion P
3o
10 5
- with steel substrate anodic reaction, form taking tripolyphosphate iron as main complicated protective membrane.These the two kinds of rust-stabilising pigment performance stacks of zinc phosphate and aluminium triphosphate, the fine and close purification membrane of formation is water insoluble, and hardness is high, and sticking power excellence makes water-base epoxy zinc phosphate protective system have remarkable Corrosion Protection.
Embodiment
Further illustrate the present invention below by embodiment.
EXAMPLE l:
Unit takes following raw materials according by weight: aqueous epoxy emulsion (liquid epoxies dispersion E20) 25 weight parts, process white 15 weight parts, rust-stabilising pigment 20 weight parts (rust-stabilising pigment is that zinc phosphate and aluminium triphosphate are composite, and weight proportion is 1:3), mica powder 5 weight parts, iron oxide red mill base 5 weight parts, dispersion agent (COADIS 123K) 2 weight parts and water 30 weight parts.
Under high-speed stirring, successively by blending dispersion such as rust-stabilising pigment, mica powder, pigment, process white, dispersion agent and water to 70 microns of following form slurry of fineness, under 500r/min-800r/min stir speed (S.S.), add again aqueous epoxy emulsion, stir, after filtration, obtain A component.
Get fatty amine aqueous dispersion (AB-HGA) 5 weight parts, water 3 weight parts, propylene glycol monomethyl ether 1.0 weight parts that carry out after end-blocking, addition and be made into B component.
Then A, B two components according to the ratio mixing and stirring of weight ratio 8:1, slaking 15 minutes, obtain the environment-friendly type aqueous epoxy phosphate zinc anticorrosive coating for steel construction that can directly construct, this coating is brushed or is sprayed on tinplate sheet, 20 minutes surface dryings of film, 30 microns of coating thicknesses, dry one week film can be completely curing, test film performance:
Test event test result
Time of drying surface drying/min 20
Do solid work/h 2
Shock resistance/kgcm 50
Sticking power/level (drawing lattice 1mm) 0
Snappiness/mm 1
Pencil hardness/H 3
Salt water resistance (3%NaCl) 1000h is without extremely.
Embodiment 2:
Unit takes following raw materials according by weight: aqueous epoxy emulsion (liquid epoxies dispersion E51) 40 weight parts, rust-stabilising pigment (rust-stabilising pigment is that zinc phosphate and aluminium triphosphate are composite, and weight proportion is 1:3) 10 weight parts, mica powder 10 weight parts, titanium white mill base 10 weight parts, process white 5 weight parts, dispersion agent (COADIS 123K) 0.5 weight part and water 10 weight parts.
Under high-speed stirring, successively by blending dispersion such as rust-stabilising pigment, mica powder, pigment, process white, dispersion agent and water to 70 microns of following form slurry of fineness, under 500r/min-800r/min stir speed (S.S.), add again aqueous epoxy emulsion, stir, after filtration, obtain A component.
Get fatty amine aqueous dispersion (703) 15 weight parts, water 8 weight parts, propylene glycol monomethyl ether 5 weight parts that carry out after end-blocking, addition, mix and be made into B component.
Then A, B two components according to the ratio mixing and stirring of weight ratio 8:1, slaking 15 minutes, obtain the environment-friendly type aqueous epoxy phosphate zinc anticorrosive coating for steel construction that can directly construct, this coating is brushed or is sprayed on tinplate sheet, 30 minutes surface dryings of film, 30 microns of coating thicknesses, dry one week film can be completely curing, test film performance:
Test event test result
Time of drying surface drying/min 30
Do solid work/h 12
Shock resistance/kgcm 50
Sticking power/level (drawing lattice 1mm) 0
Snappiness/mm 1
Pencil hardness/H 3
Salt water resistance (3%NaCl) 1000h is without extremely.
In embodiments of the invention, each component can also produce following variation:
In the present invention, described dispersion agent is special modified polycarboxylic acid sylvite.
In the present invention, described pigment is the pigment with opacifying power.
In the present invention, described aqueous epoxy emulsion is liquid or solid epoxy resin dispersion, and as E20, E44, E51, solidifying agent is the fatty amine aqueous dispersion carrying out after end-blocking, addition, as AB-HGA, 703 etc.
In the present invention, described solubility promoter is DPnB, DPM or propylene glycol monomethyl ether.
Be only preferred embodiment of the present invention in sum, be not used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application the scope of the claims change and modify, all should be technology category of the present invention.
Claims (8)
1. an environment-friendly type aqueous epoxy phosphate zinc protective system for steel construction, it has A, B two components; It is characterized in that: described A component is made up of aqueous epoxy emulsion 25-40 weight part, rust-stabilising pigment 10-20 weight part, process white 5-15 weight part, mica powder 5-10 weight part, pigment 5-10 weight part, dispersion agent 0.5-2 weight part and water 10-30 weight part; B component is made up of solidifying agent 5-15 weight part, solubility promoter 1-5 and water 3-8 weight part; Wherein: described rust-stabilising pigment is that zinc phosphate and aluminium triphosphate are composite, and weight proportion is 1:3; Described A, B two components are mixed according to the ratio of weight ratio 8:1.
2. environment-friendly type aqueous epoxy phosphate zinc protective system for steel construction according to claim 1, is characterized in that: described dispersion agent is special modified polycarboxylic acid sylvite.
3. environment-friendly type aqueous epoxy phosphate zinc protective system for steel construction according to claim 1, is characterized in that: described pigment is the pigment with opacifying power.
4. environment-friendly type aqueous epoxy phosphate zinc protective system for steel construction according to claim 3, is characterized in that: described pigment is titanium dioxide or iron oxide red mill base.
5. environment-friendly type aqueous epoxy phosphate zinc protective system for steel construction according to claim 1, is characterized in that: described aqueous epoxy emulsion is liquid or solid epoxy resin dispersion.
6. environment-friendly type aqueous epoxy phosphate zinc protective system for steel construction according to claim 1, is characterized in that: described solidifying agent is the fatty amine aqueous dispersion carrying out after end-blocking, addition.
7. environment-friendly type aqueous epoxy phosphate zinc protective system for steel construction according to claim 1, is characterized in that: described solubility promoter is DPnB, DPM or propylene glycol monomethyl ether.
8. the preparation method of environment-friendly type aqueous epoxy phosphate zinc protective system for the steel construction as described in claim 1 or 2 or 3 or 4 or 5 or 6 or 7, it is characterized in that: concrete steps are, (1) A component preparation: use high speed dispersor under 500-1500r/min rotating speed, add successively water, rust-stabilising pigment, process white, mica powder, pigment, dispersion agent, blending dispersion to fineness reaches the following form slurry of 70 order, then under 500r/min-800r/min stir speed (S.S.), add aqueous epoxy emulsion, stir, slaking, obtains A component after filtration; (2) B component preparation: under high speed dispersor, solidifying agent, solubility promoter, water are mixed in proportion; (3) A, B two components are mixed according to the ratio of mass ratio 8:1, in container, mix, obtain environment-friendly type aqueous epoxy phosphate zinc anticorrosive coating for steel construction.
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| CN201110450117.6A CN102533053B (en) | 2011-12-29 | 2011-12-29 | Environmental-friendly waterborne epoxy zinc phosphate anti-corrosion paint for steel structures and preparation method thereof |
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| CN102533053B true CN102533053B (en) | 2014-07-09 |
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| CN102993906B (en) * | 2012-11-28 | 2016-05-11 | 安徽开林新材料股份有限公司 | Water-base epoxy antirust paint and preparation method |
| CN103146284A (en) * | 2012-12-21 | 2013-06-12 | 新疆红山涂料有限公司 | Water-based epoxy anti-corrosion primer coatings |
| CN104031527B (en) * | 2014-06-24 | 2016-06-01 | 眉山新彩涂料有限责任公司 | A kind of environment-friendly type aqueous anti-corrosion of metal paint and its preparation method |
| CN104231864B (en) * | 2014-10-11 | 2017-07-18 | 江苏华夏制漆科技有限公司 | A kind of water-based epoxy micaceous sheet iron strip rust anti-corrosive primer |
| CN104371486A (en) * | 2014-10-31 | 2015-02-25 | 无锡阳工机械制造有限公司 | Coating for inner wall of water supply pipe |
| CN104371485A (en) * | 2014-10-31 | 2015-02-25 | 无锡阳工机械制造有限公司 | Coating for inner wall of water supply pipe |
| CN104530911B (en) * | 2014-12-31 | 2017-01-11 | 厦门双瑞船舶涂料有限公司 | Preparation method for high-performance water-based environmentally-friendly anticorrosive paint used for metal base material |
| CN104673059A (en) * | 2015-02-16 | 2015-06-03 | 河南省金凤化工有限公司 | Water-based epoxy acrylic resin anticorrosive paint and preparation method thereof |
| CN110894391A (en) * | 2019-11-21 | 2020-03-20 | 无锡市太湖防腐材料有限公司 | Long-acting acid and alkali corrosion resistant water-based epoxy anticorrosive paint and preparation method thereof |
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| CN101735706A (en) * | 2010-01-07 | 2010-06-16 | 同济大学 | Waterborne polyurethane modified epoxy steel structure anti-corrosive paint and preparation method thereof |
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| CN102020909A (en) * | 2010-12-15 | 2011-04-20 | 湖南三力达化工有限公司 | High-performance aqueous epoxy anticorrosive paint for steel structures |
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Patent Citations (3)
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|---|---|---|---|---|
| CN101735706A (en) * | 2010-01-07 | 2010-06-16 | 同济大学 | Waterborne polyurethane modified epoxy steel structure anti-corrosive paint and preparation method thereof |
| CN101899256A (en) * | 2010-05-21 | 2010-12-01 | 资阳赛特化工有限公司 | Water-based transparent anticorrosive paint, preparation method and application method thereof |
| CN102020909A (en) * | 2010-12-15 | 2011-04-20 | 湖南三力达化工有限公司 | High-performance aqueous epoxy anticorrosive paint for steel structures |
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