CN102719173A - Epoxy anti-corrosive paint used for underwater concrete - Google Patents
Epoxy anti-corrosive paint used for underwater concrete Download PDFInfo
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Abstract
The invention discloses epoxy anti-corrosive paint used for underwater concrete. Liquid epoxy resin DER351 is used as a base material; polysulfide rubber is used as a flexibilizer; pentanediol diglycidyl ether 6286 is used as a diluent; zinc phosphate and iron oxide red are used as active anti-corrosive pigment; spherical silicon carbide, ceramic microspheres, mica iron oxide, sericite and precipitate vitriolic barium are used as fillings; cashew shell oil, modified phenolic aldehyde amine and modified aliphatic amine are used as curing agents; and a silane coupling agent 1121 is used as an adhesion promoter. With the cooperation of functional promoters, the raw materials are made into solvent-free double-component epoxy anti-corrosive paint used for underwater concrete through conventional preparation technique equipment. The epoxy anti-corrosive paint used for underwater concrete is highly environmental-friendly and can be directly painted or smeared on damp interfaces of underwater concrete and rapidly solidified into films; the coating has great adhesion and strong abrasion resistance and corrosion prevention. The epoxy anti-corrosive paint used for underwater concrete is widely applied to the corrosion prevention of various underwater concrete facilities.
Description
Affiliated technical field
The present invention relates to Steel Concrete protective system technical field, relate to a kind of underwater concrete corrosion-resistant epoxy paint specifically.
Background technology
Now; Along with the fast development of China's economic construction, construction work is extensive, relates to every field; Like facilities such as the port and pier of skeleton construction, bridge bridge pier, wind-power tower bases; Owing to be in water immersion district, tidal range district, splash zone throughout the year, what suffer seawater and marine life dashes the mill corrosion, makes that original corrosionproof protection coating wrecks on the structures; Fresh water field by land; River dike, reservoir dam, power station, flood-relief channel, hydro project and engineering of water treatment, mine, tunnel etc.; Owing to be under water or wet environment, skeleton construction are worn and torn by wave or water impact, burn into throughout the year throughout the year; Make original protective layer be damaged, safeguard, need a kind of protective system of the film-forming of damping interface under water in order to make these facility original places obtain application.At present, reach damping interface under water and mainly contain vibrin system, ethenoid resin system and epoxy resin 3 individual system with protective system; The coating that the vibrin system forms is thin and soft, is vulnerable to damage; The ethenoid resin system need add solvent, is unfavorable for construction, in water, solidifies not exclusively, and the feature of environmental protection is poor; It is less that the ring-opening reaction of epoxy resin is influenced by water; The epoxy resin molecule contains a large amount of polar groups; Be easier to displacement and fall coated article surface water molecule, good to various substrate adhesions, and the cured article volumetric shrinkage is low; Epoxy resin has that mechanical property is good, cohesive strength is high, the characteristics of excellent combination property, is fit to be applied to the anticorrosive coating field.Develop good, the concrete damping interface direct brushing or batch scrape under water of a kind of feature of environmental protection as early as possible; And the fast setting film forming, coating has outstanding sticking power, underwater concrete that Corrosion Protection is strong is the problem that current in the art urgent need is researched and solved with corrosion-resistant epoxy paint.
Summary of the invention
The object of the present invention is to provide a kind of have favorable environment protection, concrete damping interface direct brushing or batch scrape under water; And the fast setting film forming, coating has outstanding sticking power, anti-impact mill, underwater concrete that Corrosion Protection is strong is used corrosion-resistant epoxy paint.
In order to achieve the above object, the present invention adopts following technical scheme: a kind of underwater concrete is used corrosion-resistant epoxy paint, is base-material with liquid-state epoxy resin DER351; With pentanediol glycidyl ether 6286 is thinner; With zn phosphate, red iron oxide is active anti-corrosion paint, is filler with spherical silit, ceramic fine bead, iron mica, sericite, process white; With cashew nut oil modified phenolic aldehyde amine and modified fatty amine is solidifying agent; With silane coupling agent 1121 is adhesion promoter, under the cooperation of functional agent, is prepared into underwater concrete solvent-free, two-pack through conventional preparation technology and uses corrosion-resistant epoxy paint; Composition in the coating is constructed as follows:
The A component:
More than each component measure unit in massfraction/%;
The B component:
More than each component measure unit in massfraction/%;
The A component with the mixing quality ratio of B component is: A component: B component=100: 50.
Various compositions in the present invention's prescription are the commercially available prod, and the source channel is extensive.
Underwater concrete is following with corrosion-resistant epoxy paint preparation technology:
The preparation of step 1, A component:
By the prescription weighing; With liquid-state epoxy resin DER 351, liquid polysulphide rubber JLY-121, pentanediol glycidyl ether 6286, add in the dispersion tank, stir adding dispersant B YK-P 104, flow agent BYK-361, skimmer BYK-A 530, silit, iron mica, sericite, process white down; High speed dispersion 30min; Through three-roller mesh-of-grind＜40 μ m, add ceramic fine bead at last and disperse 20min again, filter and package for use to evenly;
The preparation of step 2, B component:
By the prescription weighing; With cashew nut oil modified phenolic aldehyde amine NX-2007, modified fatty amine SM593, silane coupling agent 1121, dispersant B YK-P 104, flow agent BYK-361, skimmer BYK-A 530, iron mica, sericite, process white; Add in the dispersion tank successively; High speed dispersion 30min is through three-roller mesh-of-grind＜40 μ m, packed for standby use.
The selection of binder resin in the present invention's prescription, the preparation solventless epoxy anti-corrosive coating is selected low molecular mass, low viscosity epoxy resin.Bisphenol f type epoxy resin viscosity is low, and various performances are good, suit to make solventless epoxy coating, but price is high; Bisphenol A type epoxy resin E51 also can make solventless epoxy coating, though the lower viscosity of price is higher; Liquid-state epoxy resin DER 351 epoxy resin combine the advantage of Bisphenol F type and bisphenol A type epoxy resin, and moderate, the suitable binder resin of making solventless epoxy anti-corrosive coating.Because form fine and close aromatic structure behind the epoxy resin cure, cross-linking density is big, force of cohesion is strong, makes the deformability of its cured article poor, often presents brittle state, coating opposing water flow impact pressure and temperature deformation ability are relatively poor.In order to improve the snappiness of epoxy resin cured product, select liquid polysulphide rubber that epoxy resin is carried out modification.Liquid polysulphide rubber has toughness, snappiness, resistant of high or low temperature, water-fast erosion resistance, oil resistant solvent resistance, antifouling mildew resistance etc. preferably; Active sulfhedryl is arranged (SH) in its molecular structure; Can with epoxy reaction; Can in the crosslinking structure of epoxy coating, introduce a part of soft segment and form block, reduce coating force of cohesion.Behind the thiorubber toughening modifying epoxy resin cure; The thiorubber that is connected the epoxy resin rigid chain segment disperses to separate out with the elastic granule state; In system, form " island structure ", the caoutchouc elasticity group that promptly in stiffening ring oxysome type framework, distributing, thus improved the sticking power and the snappiness of cured product; Give higher work of rupture of coating and Young's modulus, what anti-sea beaten of enhancement coating or rivers were held the sand current under the arm dashes the mill performance.In order to reduce the viscosity of coating, selected pentanediol glycidyl ether 6268 to make thinner, not only viscosity is low, dilution effect good for it, and can with the solidifying agent crosslinking reaction, improve cross-linked network density.Because this thinner possess hydrophilic property, but therefore the doing of enhancement coating, wet interface sticking power are suitable for submersible service.
The selection of solidifying agent is used for the epoxy hardener of underwater concrete substrate interface, and must have following characteristics: (1) has higher polarity and lower viscosity; (2) water insoluble and not by emulsifying water; (3) with epoxy resin higher cross-linking density and snappiness are arranged; (4) have low-temperature curing and hypotoxicity; (5) have fast setting and high adhesive force characteristic under wet condition.The epoxy hardener that possesses above-mentioned characteristic simultaneously is of less types, can mix through dissimilar epoxy hardener collocation and realize; Cashew nut oil modified phenolic aldehyde amine is the novel epoxy solidifying agent that a kind of cryodrying speed is fast, antiseptic property is excellent; Contain a large amount of phenolic hydroxyl group and active high aliphatic amides of normal-temperature reaction that can promote epoxy resin cure in its molecular structure; Make the curing system in the winter time also can fast setting under the coldcondition, high polar hydroxyl can also strengthen the wetting and sticking power to ground simultaneously.In addition, the cashew nut shell oil verivate generally is to be the basis with the carbon 15 long-chain substituted phenols that contain unsaturated double-bond, and carbon 15 long-chains can provide excellent in water resistance and snappiness to system.Contain benzene ring structure in the substituted phenol simultaneously, have the characteristics of resistance to chemical attack again.The hardness of the existing low relative molecular mass aliphatic amide of this solidifying agent system and good chemicals-resistant corrosive nature; Long, the good snappiness and the low toxicity performance of usage period of low relative molecular mass polymeric amide system arranged again, also have the fast setting of general phenolic aldehyde amine system and good sticking power in addition.In order further to improve the underwater curing speed of epoxy curing systems, sticking power and snappiness, select modified fatty amine SM593 to make auxiliary solidifying agent.Modified fatty amine SM593 can solidify under low temperature and wet environment, and, good toughness fast with epoxy resin cure, shock resistance are strong, and the mass ratio of cashew nut oil modified phenolic aldehyde amine and modified fatty amine is 2: 1-3: 1.
The selection of color stuffing, concrete substrate reach damping interface under water and use corrosion-resistant epoxy paint, and the apolegamy of color stuffing is required: (1) has certain hydrophilic reactive behavior and the function that transforms iron rust; (2) have outstanding rust resistance and corrosion resistance function, and low toxic and environment-friendly; (3) has good shield effectiveness and anti-impact mill performance; (4) has good sexual valence mechanical property when.In view of the above, in view of the above, selected zn phosphate, red iron oxide, silit, ceramic fine bead, iron mica, sericite and permanent white to be used.Zn phosphate, red iron oxide all are active anti-corrosion paints commonly used in the protective system, and zn phosphate is met the water capacity and is prone to disassociation or hydrolysis, generates s-generation phosphate ion, phosphate radical and iron rust ionic reaction, and generation indissoluble and phosphoric acid salt adhesion layer closely cause anodic polarization; And the OH in zine ion and cathodic area
-1Reaction generates the indissoluble thing and causes cathodic polarization, has inhibition, passivation.Red stone is not only a kind of tinting pigment, can also play the satisfactory stability effect to preservative coat simultaneously, and is obvious to the hot effect of moisture-resistant that improves coating.Iron mica is structure in the form of sheets, and chemicalstability is good, is a kind of physics anti-corrosion paint commonly used, and it is the overlapping arrangement of fish scale shape in coating, and the infiltration of corrosive medium is played barrier action, also plays dispersion coatings stress simultaneously, prevents the effect of film cracking.Mica also is a kind of laminal filler, can strengthen shielding, tenacity, the water-fast chemical resistance of filming; Permanent white density is big, can improve the hardness and the wear resistance of filming.The silit of globosity and the ceramic fine bead particle diameter is little, surface-area is big, hardness is high wherein; Be prone to absorb filmogen and form the cross-linking set that is as the criterion; Spheroidal particle combines more firmly with the toughening modifying epoxy adhesive, and the coating adhesion of formation, shock resistance and wear resistance are all very excellent.Experimental result proves, when the resin-pigment ratio of coating is 0.3, and m (red iron oxide): m (zn phosphate): m (silit): m (ceramic fine bead): m (iron mica): m (sericite): m (permanent white)=2: 1: 2: 1: 1: 1: 1 o'clock; The corrosion-resistant epoxy paint over-all properties of preparation is best.
The selection of adhesion promoter, anti-corrosive paint of epoxy resin has fabulous sticking power to the exsiccant concrete substrate, but when interface zone water, the sticking power that the curable epoxide thing is filmed just reduces greatly.Therefore need select a kind of adhesion promoter for use, make between coating and the ground and form chemical bonds, strengthen sticking power.Silane coupling agent has two kinds of different reactive groups: close inorganic group and close organic group.The chemical group reaction on parent's inorganic group and inorganics surface forms strong chemically bonded; Parent's organic group and reactive organic molecule or physics twine, thereby make organic and inorganic materials interface realization chemical bonding.Silane coupling agent 1121 is a kind of strong adhesion, multi-functional silane coupling agent, and the epoxy coating of adding 1121 significantly improves sticking power at the high moist interfacial energy of immersion neutralization.Its mechanism is: after coating coating construction; Silane is to coating and ground interfacial migration; Run into the moisture hydrolyzable and become the silanol base this moment; Hydroxyl on silanol base and the substrate surface forms hydrogen bond or is condensed into Si-O-M (M represents inorganic surfaces) covalent linkage, and simultaneously, each intermolecular silanol base of silane is condensed into cancellated mulch film again each other.In addition, silane carries out bridge joint with organism and inorganics in coating, form reticulated structure closely, the stability of enhancement coating force of cohesion and water-fast etch.
The selection of auxiliary agent: the surface tension of underwater curing epoxy coating must be far below water, therefore need select for use promptly good to band water-base wettability, can reduce the capillary wetting dispersing agent of coating system again.BYK-P104 is the unsaturated polycarboxylic acid polymers soln of a kind of lower molecular weight; Have wetting, dispersion, perviousness; It is inner that moisture that can coated article is residual sucks coating, thereby strengthen coating to the sticking power with water base material, during paint solidification; Along with tight cancellated formation, again the moisture extruding is excluded.Flow agent BYK-361 is a kind of organic silicon modified by polyether auxiliary agent, and it can reduce the surface tension of coating, provides better ground wetting, can impel the coatingsurface levelling at short notice.BYK-A530 is a kind of efficient bubble, skimmer of pressing down, and can reduce thick slurry curable epoxide thing internal porosity, strengthens density, improves impervious shield effectiveness.In order to improve the thixotropy of epoxy coating, give coating a kind of structural viscosity, reach the thick not purpose of sagging that is coated with of construction, select for use anti-sagging agent BYK-410 to make anti-sagging agent.
The present invention is through detecting performance such as following table:
Underwater concrete is used the corrosion-resistant epoxy paint performance index
Test result shows that each item performance of the present invention meets this area national standard.
With liquid-state epoxy resin DER 351 is base-material; Be toughner with the liquid polysulphide rubber, be thinner with pentanediol glycidyl ether 6286; With zn phosphate, red iron oxide is active anti-corrosion paint, is filler with spherical silit, ceramic fine bead, iron mica, sericite, process white; With cashew nut oil modified phenolic aldehyde amine and modified fatty amine is solidifying agent; With silane coupling agent 1121 is adhesion promoter; Under the cooperation of functional agent, be prepared into solvent-free, two-pack, underwater concrete technical scheme with corrosion-resistant epoxy paint through conventional preparation technology; Make the present invention have favorable environment protection, concrete belt rust damping interface direct brushing or batch scrape under water; And the fast setting film forming, coating has outstanding sticking power, anti-impact mill, Corrosion Protection is strong, has reached goal of the invention.
Embodiment
Below in conjunction with specific embodiment the present invention is described in further detail: a kind of underwater concrete is used corrosion-resistant epoxy paint, is base-material with liquid-state epoxy resin DER 351; Liquid polysulphide rubber is a toughner; With pentanediol glycidyl ether 6286 is thinner; With zn phosphate, red iron oxide is active anti-corrosion paint, is filler with spherical silit, ceramic fine bead, iron mica, sericite, process white; With cashew nut oil modified phenolic aldehyde amine and modified fatty amine is solidifying agent; With silane coupling agent 1121 is adhesion promoter, under the cooperation of functional agent, is prepared into underwater concrete solvent-free, two-pack through conventional preparation technology and uses corrosion-resistant epoxy paint; Composition in the coating is constructed as follows:
The A component:
More than each component measure unit in massfraction/%;
The B component:
More than each component measure unit in massfraction/%;
Underwater concrete with corrosion-resistant epoxy paint preparation technology is:
The preparation of step 1, A component:
By the prescription weighing; With liquid-state epoxy resin DER 351, liquid polysulphide rubber, pentanediol glycidyl ether 6286, add in the dispersion tank, stir adding dispersant B YK-P 104, flow agent BYK-361, skimmer BYK-A 530, silit, iron mica, sericite, process white down; High speed dispersion 30min; Through three-roller mesh-of-grind＜40 μ m, add ceramic fine bead at last and disperse 20min again, filter and package for use to evenly;
The preparation of step 2, B component:
By the prescription weighing; With cashew nut oil modified phenolic aldehyde amine NX-2007, modified fatty amine SM593, silane coupling agent 1121, dispersant B YK-P 104, flow agent BYK-361, skimmer BYK-A 530, iron mica, sericite, process white, add in the dispersion tank successively; High speed dispersion 30min; Through three-roller mesh-of-grind＜40 μ m, packed for standby use.
During use, the A component with the mixing quality ratio of B component is: A component: B component=100: 50.
Claims (2)
1. a underwater concrete is used corrosion-resistant epoxy paint, is base-material with liquid-state epoxy resin DER351; With the liquid polysulphide rubber is tackifier; With pentanediol glycidyl ether 6286 is thinner; With zn phosphate, red iron oxide is active anti-corrosion paint, is filler with spherical silit, ceramic fine bead, iron mica, sericite, process white; With cashew nut oil modified phenolic aldehyde amine and modified fatty amine is solidifying agent; With silane coupling agent 1121 is adhesion promoter, under the cooperation of functional agent, is prepared into underwater concrete solvent-free, two-pack through conventional preparation technology and uses corrosion-resistant epoxy paint; Composition in the coating is constructed as follows:
The A component:
More than each component measure unit in massfraction/%;
The B component:
More than each component measure unit in massfraction/%;
The A component with the mixing quality ratio of B component is: A component: B component=100: 50.
According to claim 1 underwater concrete with the preparation method of corrosion-resistant epoxy paint: its process step is following:
The preparation of step 1, A component:
By the prescription weighing; With liquid-state epoxy resin DER 351, liquid polysulphide rubber, pentanediol glycidyl ether 6286, add in the dispersion tank, stir adding dispersant B YK-P 104, flow agent BYK-361, skimmer BYK-A 530, silit, iron mica, sericite, process white down; High speed dispersion 30min; Through three-roller mesh-of-grind＜40 μ m, add ceramic fine bead at last and disperse 20min again, filter and package for use to evenly;
The preparation of step 2, B component:
By the prescription weighing; With cashew nut oil modified phenolic aldehyde amine NX-2007, modified fatty amine SM593, silane coupling agent 1121, dispersant B YK-P 104, flow agent BYK-361, skimmer BYK-A 530 iron micas, sericite, process white, add in the dispersion tank successively; High speed dispersion 30min; Through three-roller mesh-of-grind＜40 μ m, packed for standby use.
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| CN102911586A (en) * | 2012-10-24 | 2013-02-06 | 江苏纽克莱涂料有限公司 | Epoxy anticorrosion decoration paint |
| CN103333468A (en) * | 2013-07-09 | 2013-10-02 | 云南曲靖润扬商贸有限公司 | Filling resin of electrolytic zinc negative plate stripping mouth and processing technology thereof |
| CN104926231A (en) * | 2015-06-01 | 2015-09-23 | 刘志勇 | Anti-rust protective coating for steel material and preparation method of anti-rust protective coating |
| CN104987806A (en) * | 2015-07-07 | 2015-10-21 | 冶建新材料股份有限公司 | Solvent-free anticorrosive coating |
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| CN102911586A (en) * | 2012-10-24 | 2013-02-06 | 江苏纽克莱涂料有限公司 | Epoxy anticorrosion decoration paint |
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| CN104926231A (en) * | 2015-06-01 | 2015-09-23 | 刘志勇 | Anti-rust protective coating for steel material and preparation method of anti-rust protective coating |
| CN104987806A (en) * | 2015-07-07 | 2015-10-21 | 冶建新材料股份有限公司 | Solvent-free anticorrosive coating |
| CN105948304A (en) * | 2016-05-02 | 2016-09-21 | 北京工业大学 | Direct solidification processing method for arsenic wastewater |
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| CN106116361A (en) * | 2016-06-28 | 2016-11-16 | 王青 | A kind of concrete of anticorrosion and carbonization and preparation method thereof |
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| 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 |
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| CN113185895A (en) * | 2021-04-30 | 2021-07-30 | 华南理工大学 | Coating material, preparation method thereof and application thereof in marine concrete surface protection |
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Application publication date: 20121010 |