CN101386769A - Single-component epoxy zinc rich primer - Google Patents
Single-component epoxy zinc rich primer Download PDFInfo
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- CN101386769A CN101386769A CNA2008102229842A CN200810222984A CN101386769A CN 101386769 A CN101386769 A CN 101386769A CN A2008102229842 A CNA2008102229842 A CN A2008102229842A CN 200810222984 A CN200810222984 A CN 200810222984A CN 101386769 A CN101386769 A CN 101386769A
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Abstract
The invention relates to a single-composition epoxy zinc-rich primer, which comprises an epoxy resin, a cross-linking agent, zinc powder, a water absorbent, and a solvent. The primer is characterized in that the primer also comprises other sheet metal powder. The using amount of the compositions are as follows: 100 weight percent of the epoxy resin (solid), 5 to 60 weight portions of the cross-linking agent (solid), 500 to 1, 100 weight portions of the zinc powder, 2 to 15 weight portions of the water absorbent, 1 to 20 weight portions of an addition agent, 0 to 50 weight portions of pigment and/or stuffing, 200 to 800 weight portions of the solvent, and other sheet metal powder which accounts for 2 to 20 percent of the using amount of the zinc powder;, wherein the other sheet metal powder is one or two or three of aluminum powder, stainless steel powder or nickel powder. The primer is particularly suitable for corrosion resistance of workpieces made of metal materials, can be thinly coated, and has better anticorrosion property; and the single-composition epoxy zinc-rich primer which is steadily stored can meet the need of continuous production of stream lines.
Description
Technical field
The present invention relates to a kind of single-component epoxy zinc rich primer, be specially adapted to the protection against corrosion of metallic substance workpiece.
Background technology
Epoxy zinc rich primer is meant the organic zinc-rich primer of film forming matter based on Resins, epoxy, and it plays the galvanic protection effect by sacrificing zinc powder to grounds such as iron and steel in corrosive environment.Existing epoxy zinc rich primer mostly is three packing or two packings, and one of them packing is a zinc powder.Take by weighing respectively in proportion during construction, mix also and use after the slaking.The weak point of the epoxy zinc rich primer of this many packings is: need repeatedly weighing during use, and very inconvenient; Disperse the zinc powder time environment and operator all to be harmful to than long and zinc powder dust; After the mixing, construction in time, working life is shorter.The rich zinc anti-corrosive paint of a kind of single-component epoxy is arranged at present, and its each component is packaging together.It is to be crosslinking and curing agent with the ketoimine.Though the rich zinc anti-corrosive paint of this single-component epoxy does not need repeatedly weighing and disperses zinc powder, but, behind its coated substrate, ketoimine need absorb airborne moisture gradually just can be hydrolyzed to primary amine, the reaction of epoxide group generation cold cross-linking in primary amine groups and the Resins, epoxy begins to solidify then, and the paint film completely solidified generally needed more than the week, therefore, can't satisfy modern protection against corrosion industry streamline demand of continuous work of auto; In addition, as etch-proof epoxy zinc rich primer, require the zinc powder consumption to account for more than 77% of dry paint gross weight usually, its film thickness is usually more than 75 μ m, and in heavy anticorrosive engineering field, its film thickness in addition to reach 250 μ m more than could satisfy the heavy anticorrosive engine request.But, some is needed the workpiece of corrosion-proof coating, both needed higher Corrosion Protection, tolerance value because of design is little again, does not allow the protection against corrosion paint film too thick, though adopt zinc flake, paint film can have anticorrosion ability preferably under thin state, but because the zinc powder large usage quantity, and the price of zinc flake is higher, can not satisfy customer requirements on cost.Therefore, being badly in need of can scumbling, cost is lower and have the epoxy zinc rich primer of higher corrosion proof function.Applicant's related a kind of single-component epoxy zinc rich primer in Chinese invention patent (ZL01138040.3) is the formulation for coating material according to the requirement of application scenario design, and thicker and requirement of its coating and the supporting use of finish paint just can have Corrosion Protection preferably.
Summary of the invention
The objective of the invention is: provide scumbling of a kind of energy and Corrosion Protection better, the single-component epoxy zinc rich primer of shelf-stable particularly can satisfy the needs that the streamline serialization is produced.
The technical scheme that realizes the object of the invention is: a kind of single-component epoxy zinc rich primer, comprise Resins, epoxy, linking agent, zinc powder, water-retaining agent, solvent, its characteristics are, also have other metal powders of sheet, each amounts of components is as follows: Resins, epoxy is in solids constituent 100 weight parts, linking agent is in solids constituent 5～60 weight parts, zinc powder 500～1100 weight parts, water-retaining agent 2～15 weight parts, auxiliary agent 1～20 weight part, pigment and/or filler 0～50 weight part, solvent 200～800 weight parts, other metal powders of sheet are 2～20% of zinc powder consumption; Other metal powders of described sheet are one or both or three kinds in aluminium powder, Stainless Steel Powder, the nickel powder.
Above-mentioned single-component epoxy zinc rich primer, its each amounts of components is as follows: Resins, epoxy is in solids constituent 100 weight parts, linking agent is in solids constituent 20～40 weight parts, zinc powder 700～1000 weight parts, water-retaining agent 5～12 weight parts, auxiliary agent 8～16 weight parts, filler 0～6 weight part, solvent 300～600 weight parts, other metal powders of sheet are 4～10% of zinc powder consumption; Other metal powders of described sheet are aluminium powders.
Above-mentioned single-component epoxy zinc rich primer, its described water-retaining agent are one or both in periporate powder metal oxide, periporate powder carbide, calcium cpd, metal alkoxide compound, silane coupling agent, titanate coupling agent, the monofunctional isocyanates.
Above-mentioned single-component epoxy zinc rich primer, its described linking agent are one or more in resol, aminoresin, blocked isocyanate, aromatic amine, the acid anhydrides.
Above-mentioned single-component epoxy zinc rich primer, its described solvent is by 2 kinds or 3 kinds or 4 kinds of mixed solvents that oil-based solvent is formed.Described oil-based solvent is benzene class, acetate esters, ketone, gylcol ether, glycol ether ester or solvent oils.Preferred dimethylbenzene: butylacetate: the mixed solvent that ethyl cellosolve acetate was formed by weight 2: 1: 1.
Above-mentioned single-component epoxy zinc rich primer has at least two epoxide groups in the molecule of its described Resins, epoxy, be preferably 2～5 epoxide groups; Its number average relative molecular mass is 200～5000, is preferably 345～4000, and its representative products is: home made article bisphenol A-type (as unification of the motherland trade mark E-03, E-06, E-12, E-20, E-44, E-51 etc.) or F type or EX type etc.; The D.E.R.331 of the EPON1009 of external product such as SHELL company, EPON1006, EPON1001, EPON872, EPON834, EDPP etc. and Dow company, D.E.R.661, D.E.R.664, D.E.R.669, D.E.N.439 etc.
Above-mentioned single-component epoxy zinc rich primer, its described auxiliary agent are one or more in anti-settling agent, thickening material, flow agent, defoamer, dispersion agent, directing agent, the curing catalyst.
Above-mentioned single-component epoxy zinc rich primer, its described pigment are one or more in the modified phosphate with corrosion proof function, unmodified phosphoric acid salt, chromic salt, the molybdate.
Above-mentioned single-component epoxy zinc rich primer, its described filler are one or more in talcum powder, mica powder, kaolin, the pure aluminium silicate.
Technique effect of the present invention is: single-component epoxy zinc rich primer of the present invention, owing to adopt other metal powders of an amount of sheet to cooperate with zinc powder, under the effect of auxiliary agent (directing agent), other metal powders of sheet are parallel to ground and are arranged in the paint film, make corrosive medium such as water, corrosive ion, oxygen etc. infiltrate paint film contact with ground the path propagation of process, both improved anticorrosion ability, can not influence the galvanic protection effect of zinc powder again because of having reduced the zinc powder consumption, the requirement and the cost performance that therefore, can be only just can satisfy the heavy anticorrosive engineering with scumbling priming paint suit; Owing to allocate suitable linking agent into, only under 120～300 ℃ just can with hydroxyl and/or the epoxy group(ing) generation crosslinking reaction in the Resins, epoxy, and chemical reaction can not take place under normal temperature condition, thus realized single packing, removed operations such as repeatedly weighing, slaking, long-time dispersion from; Proper amount of cross-linking agent guarantees that paint film can not cause degradation because of solidifying deficiency, even occurs being clamminess and to do phenomenon, can be, or because of the reaction between the remaining solidifying agent because of the paint film over-curing yet, and the mechanical property that causes paint film worsens and influences its anticorrosion ability; An amount of water-retaining agent of allocating into guarantees that priming paint shelf-stable, working life are long, is specially adapted to the requirement that the streamline serialization is produced.
Embodiment
Below in conjunction with embodiment the present invention is done further specific descriptions, but be not limited thereto.
Embodiment and comparative example are unless otherwise indicated raw materials used, are coating technical grade commercially available product, and equipment used is the coatings industry conventional equipment, and quantity related in embodiment and the comparative example is weight part.
Embodiment 1～8 preparation single-component epoxy zinc rich primer
(1) prescription sees Table 1
Table 1
In the table 1:
E-06 is a solid epoxy, and 2 epoxide groups are arranged in its molecule, and the number average relative molecular mass is 2900, Wuxi resin processing plant product;
582-2 is an aminoresin, Xinhua Resin Factory, Shanghai's product;
284# is a resol, Xinhua Resin Factory, Shanghai's product;
Spherical zinc powder fineness 1000 orders, Beijing Institute of Mining and Metallurgy's product;
Zinc flake fineness 800 orders, Beijing Institute of Mining and Metallurgy's product;
Flake aluminum median size≤12 μ m, ocean, Henan Province Aluminum company limited product;
Sheet Stainless Steel Powder median size≤12 μ m, Haining City flies to reach metallurgical powder company limited product;
The water-retaining agent vinyltrimethoxy silane is industrial goods, organosilicon novel material limited-liability company of Wuhan University product; The water-retaining agent molecular sieve is a sodium A type, is periporate powder metal oxide, Shanghai International Automobile City Tourist Festival molecular sieve factory product;
Directing agent is RAYBO41, U.S. Rui Bao company product;
Anti-settling agent is a wilkinite 881, the blue or green rainbow auxiliary chemicals in Linan, Zhejiang factory product;
Aluminium triphosphate is the WPS-2 type, new brilliant Science and Technology Ltd. of Guangxi Chemical Inst.;
Modified zinc phosphate is the ZAM type, Heubach GmbH's product;
Talcum powder is ultra-fine level, industrial goods;
Mica powder is ultra-fine level, industrial goods;
Solvent is the coating industrial goods;
(2) preparation single-component epoxy zinc rich primer
Earlier solid epoxy is made 50% solution with partially mixed solvent, join in the container of clean dried, add other raw materials except that directing agent, zinc powder, other metal powders of sheet in the prescription again, disperse to stir after 0.5 hour, add and add zinc powder and other metal powders of sheet immediately after directing agent stirs, continuing to stir did not have particulate matter in 1 hour to priming paint, promptly make single-component epoxy zinc rich primer of the present invention through the above screen filtration of 120 orders.
(3) priming paint to each embodiment carries out Performance Detection
Main test event: outward appearance, coat-thickness, drying property, salt fog resistance, sticking power, snappiness, shock-resistance, package stability;
Preparation of specimen: adopt the compressed air spraying method to apply model;
Salt fog resistance, sticking power test sample plate are the steel sheet of 120mm * 50mm * 0.8～1.2mm;
Snappiness, shock-resistance test sample plate are the tinplate of 120mm * 50mm * 0.2～0.3mm;
Concrete detection method is as follows:
1) outward appearance: range estimation;
2) film thickness: adopt the test of QuaNix4500 thickness tester;
3) drying property: by " GB/T1728 paint film putty membrane assay method time of drying " test, probe temperature is 200 ± 5 ℃, and the test duration is 20 ± 2min;
Evaluation method is as follows: A represents to do solid work; B represents not do solid work as yet;
4) salt fog resistance: test by " mensuration of GB/T1771 colored paint and the anti-neutral salt spray performance of lacquer ", test period is 240 hours;
Evaluation method is as follows: A represents that outward appearance is normal, does not have defectives such as foaming, corrosion; B represents partly foamed or corrosion; C represents that full plate bubbles or corrosion;
5) sticking power: test line space 1mm by " cross cut test of GB/T9286 paint and varnish paint film ";
6) snappiness: test by " GB/T1731 paint film flexibility assay method ";
7) shock-resistance: test by " the shock-resistant assay method of GB/T1732 paint film ";
8) package stability: take by weighing 300 each embodiment priming paint sample of gram respectively, be positioned in 350 milliliters of iron flasks, sealing was placed after 6 months, and observing the iron flask profile earlier has no abnormal, opening a jar state of observing the priming paint sample more also estimates as follows: A represents that the iron flask profile is no abnormal, and priming paint is even; B represents that the iron flask profile is no abnormal substantially, and priming paint sinks to the bottom, but can easily stir; C represents that the iron flask profile has slight drum to listen, priming paint thickening or sink to the bottom and be difficult to stir, and slight drum is listened; D represents that iron flask profile drum is listened serious or coating sinks to the bottom firmly, can't normally use.
Detected result is listed in table 2.
Table 2
| Test item | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 |
| Outward appearance | Grey, smooth | Grey, smooth | Grey, smooth | Grey, smooth | Grey, smooth | Grey, smooth | Grey, smooth | Grey, smooth |
| Film thickness, μ m | 20±2 | 20±2 | 20±2 | 20±2 | 20±2 | 20±2 | 20±2 | 20±2 |
| Drying property | A | A | A | A | A | A | A | A |
| Salt fog resistance | A | A | A | A | A | A | A | A |
| Sticking power, level | ≤1 | ≤1 | ≤1 | ≤1 | ≤1 | ≤1 | ≤1 | ≤1 |
| Snappiness, mm | 1 | 1 | 2 | 1 | 1 | 1 | 1～2 | 2 |
| Shock-resistance, kg | 50 | 50 | 50 | 50 | 50 | 50 | 50 | 50 |
| Package stability | B | C | B | B | B | B | B | B |
Comparative example 1～7
Prescription sees Table 3, and its raw material specification, priming paint preparation method and primer performance detection method are all identical with embodiment, and detected result is listed in table 4.
Table 3
Table 4
| Test item | Comparative example 1-1 | Comparative example 1-2 | Comparative example 2 | Comparative example 3 | Comparative example 4 | Comparative example 5 | Comparative example 6 | Comparative example 7 |
| Outward appearance | Grey, smooth | Grey, smooth | Grey, smooth | Grey, smooth | Grey, smooth | Grey, smooth | Grey, smooth | Grey, smooth |
| Film thickness, μ m | 20±2 | 50±2 | 20±2 | 20±2 | 20±2 | 20±2 | 20±2 | 20±2 |
| Drying property | A | A | B | A | A | A | A | A |
| Salt fog resistance | C | A | C | B | A | A | C | B |
| Sticking power, level | ≤1 | ≤1 | / | 1 | 3 | ≤1 | ≤1 | 2 |
| Snappiness, mm | 1～2 | 3 | / | >3 | >3 | 1 | 1 | 2 |
| Shock-resistance, kg | 50 | 50 | / | 35 | 20 | 50 | 50 | 50 |
| Package stability | B | B | B | B | B | C | D | B |
The detected result that table 2 and table 4 are listed shows, single-component epoxy zinc rich primer of the present invention (embodiment 1～8) is when scumbling, the salt spray resistance of its paint film reaches the A level, and (paint film appearance is normal, there are not defectives such as foaming, non-corroding), can satisfy the requirement of heavy anticorrosive engineering fully, cost performance is suitable, and carry out paint film property when detecting with priming paint (only the containing spherical zinc powder) making sheet of comparative example 1,6 and 7, the A level of having only the salt spray resistance of its paint film of increase film thickness (seeing Table 4 comparative example 1-2) just can be up to state standards; Single-component epoxy zinc rich primer embodiment 1～8 of the present invention (except the embodiment 2), the package stability of priming paint (6 months) still reaches B level (the iron flask profile is no abnormal substantially, and priming paint sinks to the bottom, but can easily stir), can normally use, can satisfy the requirement that the streamline serialization is produced.
Claims (10)
1, a kind of single-component epoxy zinc rich primer, comprise Resins, epoxy, linking agent, zinc powder, water-retaining agent, solvent, it is characterized in that, also have other metal powders of sheet, each amounts of components is as follows: Resins, epoxy is in solids constituent 100 weight parts, linking agent is in solids constituent 5～60 weight parts, zinc powder 500～1100 weight parts, water-retaining agent 2～15 weight parts, auxiliary agent 1～20 weight part, pigment and/or filler 0～50 weight part, solvent 200～800 weight parts, other metal powders of sheet are 2～20% of zinc powder consumption; Other metal powders of described sheet are one or both or three kinds in aluminium powder, Stainless Steel Powder, the nickel powder.
2, single-component epoxy zinc rich primer according to claim 1, it is characterized in that, each amounts of components is as follows: Resins, epoxy is in solids constituent 100 weight parts, linking agent is in solids constituent 20～40 weight parts, zinc powder 700～1000 weight parts, water-retaining agent 5～12 weight parts, auxiliary agent 8～16 weight parts, filler 0～6 weight part, solvent 300～600 weight parts, other metal powders of sheet are 4～10% of zinc powder consumption; Other metal powders of described sheet are aluminium powders.
3, single-component epoxy zinc rich primer according to claim 1 and 2, it is characterized in that described water-retaining agent is one or both in periporate powder metal oxide, periporate powder carbide, calcium cpd, metal alkoxide compound, silane coupling agent, titanate coupling agent, the monofunctional isocyanates.
4, single-component epoxy zinc rich primer according to claim 1 and 2 is characterized in that, described linking agent is one or more in resol, aminoresin, blocked isocyanate, aromatic amine, the acid anhydrides.
5, single-component epoxy zinc rich primer according to claim 1 and 2 is characterized in that, described solvent is by 2 kinds or 3 kinds or 4 kinds of mixed solvents that oil-based solvent is formed.
6, want 5 described single-component epoxy zinc rich primers according to right, it is characterized in that, described oil-based solvent is benzene class, acetate esters, ketone, gylcol ether, glycol ether ester or solvent oils.
7, single-component epoxy zinc rich primer according to claim 1 and 2 is characterized in that, has at least two epoxide groups in the molecule of described Resins, epoxy, and the number average relative molecular mass is 200～5000.
8, single-component epoxy zinc rich primer according to claim 1 and 2 is characterized in that, described auxiliary agent is one or more in anti-settling agent, thickening material, flow agent, defoamer, dispersion agent, directing agent, the curing catalyst.
9, single-component epoxy zinc rich primer according to claim 1 is characterized in that, described pigment is one or more in the modified phosphate with corrosion proof function, unmodified phosphoric acid salt, chromic salt, the molybdate.
10, single-component epoxy zinc rich primer according to claim 1 and 2 is characterized in that, described filler is one or more in talcum powder, mica powder, kaolin, the pure aluminium silicate.
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| CN114773961A (en) * | 2022-04-06 | 2022-07-22 | 天津大学 | Epoxy zinc-rich anticorrosive paint adopting conductive nickel interpenetrating network and preparation method thereof |
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