CN115651435A - Fingerprint-resistant liquid for aluminum-zinc-magnesium plated board and preparation method thereof - Google Patents
Fingerprint-resistant liquid for aluminum-zinc-magnesium plated board and preparation method thereof Download PDFInfo
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- CN115651435A CN115651435A CN202211090726.XA CN202211090726A CN115651435A CN 115651435 A CN115651435 A CN 115651435A CN 202211090726 A CN202211090726 A CN 202211090726A CN 115651435 A CN115651435 A CN 115651435A
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Abstract
The invention discloses a fingerprint-resistant liquid for an aluminum-zinc-magnesium plated board and a preparation method thereof, wherein the fingerprint-resistant liquid comprises the following components in parts by weight according to g/L: 200-500 parts of organic hybrid resin aqueous dispersion liquid, 0.5-30 parts of fluorocarbon-containing high molecular compound aqueous dispersion liquid, 0.1-3 parts of water-soluble antirust agent, or 0.5-5 parts of silica sol and/or 0.01-15 parts of functional assistant, and the balance of pure water or deionized water, wherein the water-soluble antirust agent is selected from metavanadate. The fingerprint-resistant liquid for the aluminum-zinc-magnesium-plated plate synergistically strengthens the compactness and the hydrophobicity of a passivation film through the synergism of resin and surface modification, simultaneously introduces the efficient self-repairing antirust agent, realizes the high water resistance of the surface of the passivation film through the synergistic effect of all components, and obviously improves the corrosion protection capability of the aluminum-zinc-magnesium passivation plate under the severe transportation and storage conditions.
Description
Technical Field
The invention belongs to the field of chemical materials, and particularly relates to a fingerprint-resistant liquid for an aluminum-zinc-magnesium plated board and a preparation method thereof.
Background
The aluminum-zinc-magnesium coating is an improved coating technology based on an aluminum-zinc coating. The carbon steel sheet is subjected to a hot dip coating process to obtain an aluminum zinc coating layer with protective properties, and the thickness of the coating layer is usually 25 μm. The aluminum-zinc plate not only provides excellent outdoor corrosion resistance, but also has a fine appearance, compared to conventional galvanized plates. Based on these advantages, aluminum zinc sheets are widely used in outdoor construction fields, such as outdoor metal panels, roofs, and light gauge steel in light steel structural houses. However, the aluminum-zinc plate still has the following defects: namely, the red rust protection capability of the cut of the aluminum-zinc plate is not good enough. Researches find that the protective effect of the cut red rust can be greatly improved by adding a small amount of magnesium in the aluminum-zinc coating. The added magnesium can promote the generation of a large amount of magnesium-zinc particles (MgZn) 2 ) The magnesium-zinc particles are uniformly distributed on the surface of the coating, in the atmospheric corrosion environment, the magnesium-zinc particles are preferentially dissolved and generate early corrosion products, the corrosion products move and uniformly cover the exposed notch surface, and finally a passivation layer with a compact structure and firm adhesion is formed.
The surface passivation products currently used on aluminum zinc magnesium coatings mainly comprise two types: chromium-containing fingerprint resistance and silane chromium-free passivation. However, in the actual use process, it is found that water enters between the aluminum-zinc-magnesium passivation plates when the package is damaged during the transportation and storage process in high temperature and high humidity and rainy days, and as a result, gray black patches with different areas are formed on the passivation plates, mainly due to uneven dissolution corrosion of magnesium-zinc particles after water enters between the plates. These surface defects not only affect the appearance of the board, but also affect its subsequent use, and the prior passivation products still cannot effectively solve the problem.
Disclosure of Invention
In order to solve the defects in the prior art, the invention mainly aims to provide the fingerprint-resistant liquid for the aluminum-zinc-magnesium-plated plate, the compactness and the hydrophobicity of a passivation film are synergistically enhanced through resin and surface modification, meanwhile, a high-efficiency self-repairing type antirust agent is introduced, the surface high water resistance of the passivation film is obtained through the synergistic effect of all the components, the corrosion protection capability of the aluminum-zinc-magnesium passivation plate under severe transportation and storage conditions (such as high temperature, high humidity, rainy days and the like) is remarkably improved, and the problem of insufficient water resistance of the existing passivation product is solved.
The invention also aims to provide the preparation method of the fingerprint-resistant liquid for the aluminum-zinc-magnesium-plated plate, which is simple in process and suitable for the aluminum-zinc-magnesium-plated continuous production line.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a fingerprint-resistant liquid for an aluminum-zinc-magnesium plated board, which comprises the following components in parts by weight according to g/L:
aqueous organic hybrid resin dispersion: 200-500 parts;
aqueous dispersion of fluorocarbon-containing polymer compound: 0.5-30 parts;
water-soluble antirust agent: 0.1-3 parts;
or further comprising a silica sol: 0.5-5 parts of and/or functional auxiliary agents: 0.01-15 parts;
the balance of pure water or deionized water;
wherein the water-soluble antirust agent is selected from metavanadate.
Preferably, the metavanadate is sodium metavanadate and/or ammonium metavanadate.
Preferably, the organic hybrid resin aqueous dispersion has a solid content of 40% to 60% and is selected from an acrylic-epoxy hybrid resin aqueous dispersion and/or an acrylic-polyurethane hybrid resin aqueous dispersion.
More preferably, the aqueous dispersion of the organic hybrid resin is a cationic aqueous dispersion of an acrylic-urethane hybrid resin having a solids content of 55%, for example, an acrylic-urethane emulsion.
Preferably, the aqueous dispersion of the fluorocarbon-containing polymer compound is an aqueous dispersion of Polytetrafluoroethylene (PTFE), which is a high molecular weight polymer consisting entirely of carbon and fluorine, and provides a high degree of hydrophobicity to the surface of the passivation film layer.
Preferably, the silica sol has a large number of hydroxyl surface groups, increases the crosslinking density of the organic hybrid resin reactive groups in the organic hybrid resin aqueous dispersion, improves the wear resistance and scratch resistance of the passivation film layer, and increases the surface area by improving the roughness of the surface of the passivation film layer.
Preferably, the functional auxiliaries are selected from levelling agents and/or defoamers, the type and amount of which is selected within the knowledge and skill of the person skilled in the art, and can be made without undue experimentation.
The invention also provides a preparation method of the fingerprint-resistant liquid for the aluminum-zinc-magnesium plated plate, which comprises the following steps:
(1) Adding pure water or deionized water into a water-soluble antirust agent, and stirring for dissolving;
(2) Under the condition of stirring, adding the organic hybrid resin aqueous dispersion liquid into the solution, and stirring until the organic hybrid resin aqueous dispersion liquid is uniformly dispersed;
(3) Under the condition of stirring, adding the aqueous dispersion liquid of the fluorocarbon-containing high molecular compound into the mixed liquid, and stirring until the aqueous dispersion liquid is uniformly dispersed;
(4) Adding the silica sol into the mixed solution under the condition of stirring, and stirring until the silica sol is uniformly dispersed.
Compared with the prior art, the invention has the following beneficial effects: the fingerprint-resistant liquid for the aluminum-zinc-magnesium-plated plate synergistically strengthens the compactness and the hydrophobicity of a passive film through the synergism of resin and surface modification, simultaneously introduces the antirust agent with high-efficiency self-repairing type, obtains the high water resistance of the surface of the passive film through the synergistic effect of all components, and obviously improves the corrosion protection capability of the aluminum-zinc-magnesium passive plate under severe transportation and storage conditions (such as high temperature, high humidity, rainy days and the like).
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly and completely described below. It should be apparent that the described embodiments are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
The fingerprint-resistant liquid for the aluminum-zinc-magnesium plated plate provided in the following examples is composed of the following components in parts by weight in terms of g/L of the fingerprint-resistant liquid: 200-500 parts of organic hybrid resin aqueous dispersion, 0.5-30 parts of fluorocarbon-containing high molecular compound aqueous dispersion, 0.1-3 parts of water-soluble antirust agent, or 0.5-5 parts of silica sol and/or 0.01-15 parts of functional additive, and the balance of pure water or deionized water.
The application method of the fingerprint-resistant liquid for the aluminum-zinc-magnesium plated board in the following embodiment comprises degreasing cleaning and roller coating, so that the passivation liquid is uniformly distributed on the surface of the aluminum-zinc-magnesium plated board, and the dry film thickness after drying is 1.0-1.2 mu m.
The performance detection of the fingerprint-resistant liquid for the aluminum-zinc-magnesium plated plate in the following embodiment comprises the following steps:
(a) And (3) corrosion resistance testing: according to the national standard (GB/T10125-2012 neutral salt spray test), the quality of the salt spray performance is judged according to the corrosion area, and the salt spray test time is 96h.
(b) Inlet water damp heat resistant lamination test (simulating corrosion of inlet water between plates): tap water was dropped on the passivated panel surface and then another passivated panel was overlaid on the tap water dropped panel surface and compacted to form a laminate sample, which was placed in a hot and humid cabinet for a laminate test time of 120h with test conditions of 95% rh and 50 ℃. After the test was completed, the stack was opened and the blackening of the two passivated panel surfaces was observed.
The raw material compositions and compounding ratios of the following examples 1 to 8 are shown in Table 1 in terms of grams per liter (g/L) per 1L of the fingerprint resistant liquid.
TABLE 1
| Examples | Acrylic acid-polyurethane emulsion | Sodium metavanadate | PTFE emulsion | Silica sol |
| 1 | 340 | 0 | 0 | 0 |
| 2 | 340 | 1.5 | 0 | 0 |
| 3 | 340 | 2 | 0 | 0 |
| 4 | 340 | 3 | 0 | 0 |
| 5 | 340 | 0 | 5 | 0 |
| 6 | 340 | 0 | 30 | 0 |
| 7 | 340 | 0 | 0 | 1 |
| 8 | 340 | 0 | 0 | 5 |
In Table 1, the acrylic-polyurethane emulsion is Lubrizol CA1009A, the PTFE emulsion is Keime-801, karman, germany, and the silica sol is SNOWTEX-UP, nissan chemical company.
TABLE 2
As can be seen from table 2, the hybrid organic resin itself (example 1) has excellent salt spray corrosion resistance, but the blackening resistance in the inlet wet heat lamination test is not good. Examples 2 to 4, to which sodium metavanadate was added, had excellent water inflow blackening resistance (no blackening), but deteriorated the salt spray corrosion resistance of the hybrid organic resin itself. The addition of a small amount of PTFE or silica sol alone (examples 5 to 8) did not affect the salt spray resistance, but did not have the protective effect against water ingress blackening.
The raw material compositions and compounding ratios of examples 9 to 15 are shown in Table 3 in terms of grams per liter (g/L) per 1L of the fingerprint-resistant liquid.
TABLE 3
| Examples | Acrylic acid-polyurethane emulsion | Sodium metavanadate | PTFE emulsion | Silica sol |
| 9 | 340 | 1 | 0 | 0 |
| 10 | 340 | 1 | 2 | 0 |
| 11 | 340 | 1.5 | 0 | 0 |
| 12 | 340 | 1.5 | 2 | 0 |
| 13 | 340 | 1.5 | 5 | 0 |
| 14 | 340 | 1.5 | 2 | 5 |
| 15 | 340 | 1.5 | 2 | 10 |
TABLE 4
As can be seen from Table 4, further reduction in the amount of sodium metavanadate (examples 9 to 10) did not provide the water ingress blackening resistance preventive effect. A small amount of PTFE and/or silica sol (examples 11 to 15) is added to a formula containing a proper amount of sodium metavanadate, so that good salt spray resistance can be obtained, the water inflow blackening resistance protection effect can be ensured, and certain lubricity can be provided for subsequent processing by adding the PTFE and/or silica sol.
The performance test result shows that the fingerprint-resistant liquid for the aluminum-zinc-magnesium plated plate can enable the surface passive film of the aluminum-zinc-magnesium plate to have high water resistance (water inlet wet heat lamination test, no blackening), and simultaneously still have excellent corrosion resistance and humidity resistance through reasonable formula design.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments and the generic principles defined herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above-described embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the principle of the present invention without departing from the scope of the present invention.
Claims (7)
1. The fingerprint-resistant liquid for the aluminum-zinc-magnesium plated board is characterized by comprising the following components in parts by weight in a gram per liter:
aqueous organic hybrid resin dispersion: 200-500 parts;
aqueous dispersion of fluorocarbon-containing polymer compound: 0.5-30 parts;
water-soluble antirust agent: 0.1-3 parts;
or further comprising a silica sol: 0.5-5 parts of and/or functional auxiliary agents: 0.01-15 parts;
the balance of pure water or deionized water;
wherein the water-soluble antirust agent is selected from metavanadate.
2. The fingerprint-resistant liquid for the aluminum-zinc-magnesium plated board according to claim 1, wherein the metavanadate is sodium metavanadate and/or ammonium metavanadate.
3. The fingerprint-resistant liquid for the aluminum-zinc-magnesium plated board according to claim 1, wherein the solid content of the aqueous dispersion of the organic hybrid resin is 40% to 60% and is selected from an aqueous dispersion of an acrylic acid-epoxy hybrid resin and/or an aqueous dispersion of an acrylic acid-polyurethane hybrid resin.
4. The fingerprint-resistant liquid for the aluminum-zinc-magnesium plated board according to claim 3, wherein the aqueous dispersion of the organic hybrid resin is an acrylic acid-polyurethane emulsion having a solid content of 55%.
5. The fingerprint-resistant liquid for an Al-Zn-Mg plated board according to claim 1, wherein the aqueous dispersion of the fluorocarbon-containing polymer compound is an aqueous polytetrafluoroethylene dispersion.
6. The fingerprint-resistant liquid for the aluminum-zinc-magnesium plated board according to claim 1, wherein the functional assistant is selected from a leveling agent and/or an antifoaming agent.
7. The method for preparing the fingerprint-resistant liquid for the aluminum-zinc-magnesium plated board according to any one of claims 1 to 6, which is characterized by comprising the following steps:
(1) Adding pure water or deionized water into a water-soluble antirust agent, and stirring for dissolving;
(2) Under the condition of stirring, adding the organic hybrid resin aqueous dispersion liquid into the solution, and stirring until the organic hybrid resin aqueous dispersion liquid is uniformly dispersed;
(3) Under the condition of stirring, adding the aqueous dispersion liquid of the fluorocarbon-containing high molecular compound into the mixed liquid, and stirring until the aqueous dispersion liquid is uniformly dispersed;
(4) Adding the silica sol into the mixed solution under the condition of stirring, and stirring until the silica sol is uniformly dispersed.
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| CN202211090726.XA CN115651435B (en) | 2022-09-07 | 2022-09-07 | Fingerprint-resistant liquid for aluminum-zinc-magnesium plated plate and preparation method thereof |
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| CN115651435B CN115651435B (en) | 2023-09-29 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101775106A (en) * | 2010-02-03 | 2010-07-14 | 江苏柏鹤涂料有限公司 | Waterborne acrylic ester-polyurethane resin emulsion and application thereof |
| WO2012100099A2 (en) * | 2011-01-19 | 2012-07-26 | President And Fellows Of Harvard College | Slippery surfaces with high pressure stability, optical transparency, and self-healing characteristics |
| DE102012008959A1 (en) * | 2012-05-03 | 2013-11-07 | NANO - X GmbH | binder system |
| CN104403538A (en) * | 2014-12-08 | 2015-03-11 | 上海涂料有限公司技术中心 | High-corrosion-resistance, high-weather-resistance and excellent-hydrophobicity chromium-free fingerprint-resistant coating used for galvanized steel sheet |
| CN110029338A (en) * | 2019-04-28 | 2019-07-19 | 攀钢集团攀枝花钢铁研究院有限公司 | The preparation method of heat zinc coating plate surface covering liquid and resistance to high humidity Passivated Hot Galvanizing Plate |
| CN110467835A (en) * | 2019-08-28 | 2019-11-19 | 吉力水性新材料科技（珠海）有限公司 | A kind of application of aqueous single group hybrid resin in terrace and corrosion-resistant field |
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- 2022-09-07 CN CN202211090726.XA patent/CN115651435B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101775106A (en) * | 2010-02-03 | 2010-07-14 | 江苏柏鹤涂料有限公司 | Waterborne acrylic ester-polyurethane resin emulsion and application thereof |
| WO2012100099A2 (en) * | 2011-01-19 | 2012-07-26 | President And Fellows Of Harvard College | Slippery surfaces with high pressure stability, optical transparency, and self-healing characteristics |
| DE102012008959A1 (en) * | 2012-05-03 | 2013-11-07 | NANO - X GmbH | binder system |
| CN104403538A (en) * | 2014-12-08 | 2015-03-11 | 上海涂料有限公司技术中心 | High-corrosion-resistance, high-weather-resistance and excellent-hydrophobicity chromium-free fingerprint-resistant coating used for galvanized steel sheet |
| CN110029338A (en) * | 2019-04-28 | 2019-07-19 | 攀钢集团攀枝花钢铁研究院有限公司 | The preparation method of heat zinc coating plate surface covering liquid and resistance to high humidity Passivated Hot Galvanizing Plate |
| CN110467835A (en) * | 2019-08-28 | 2019-11-19 | 吉力水性新材料科技（珠海）有限公司 | A kind of application of aqueous single group hybrid resin in terrace and corrosion-resistant field |
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