CN117025005B - Water-based workshop primer and preparation method thereof - Google Patents
Water-based workshop primer and preparation method thereofInfo
- Publication number
- CN117025005B CN117025005B CN202311121612.1A CN202311121612A CN117025005B CN 117025005 B CN117025005 B CN 117025005B CN 202311121612 A CN202311121612 A CN 202311121612A CN 117025005 B CN117025005 B CN 117025005B
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- component
- water
- polyethylene glycol
- acidic solution
- preparation
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Classifications
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- 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
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- 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
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
-
- 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
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Paints Or Removers (AREA)
Abstract
本发明涉及涂料领域，特别涉及一种水性车间底漆及其制备方法，所述水性车间底漆，包括甲组分和乙组分，所述甲组分包括锌粉和填料，所述乙组分包括硅酸乙酯、聚乙二醇、酸性溶液和去离子水。本发明通过使用改性硅酸乙酯，避免了碱金属的引入，从而解决了常见碱金属硅酸盐体系中，因碱金属离子残留而导致初期耐水性及后道涂层附着力下降的问题，且涂层的防腐性、耐候性和配套附着力优异，将此涂层用于船舶和大型工业中钢板的临时防护，可减少钢板损坏率，并提高与下道涂层的附着力，减少后续施工成本，提高整体施工质量。The present invention relates to the field of coatings, and particularly to a waterborne shop primer and a preparation method thereof. The waterborne shop primer comprises a component A and a component B, wherein the component A comprises zinc powder and a filler, and the component B comprises ethyl silicate, polyethylene glycol, an acidic solution, and deionized water. By using modified ethyl silicate, the present invention avoids the introduction of alkali metals, thereby resolving the problem of reduced initial water resistance and subsequent coating adhesion caused by residual alkali metal ions in common alkali metal silicate systems. Furthermore, the coating exhibits excellent corrosion resistance, weather resistance, and complementary adhesion. When used for temporary protection of steel plates in ships and large-scale industries, the coating can reduce the damage rate of the steel plates, improve adhesion to the subsequent coating, reduce subsequent construction costs, and improve overall construction quality.
Description
Technical Field
The invention relates to the field of coatings, in particular to a water-based workshop primer and a preparation method thereof.
Background
Shop primers are widely used in the construction of ships and large industrial steel structures, and are mainly used for providing temporary corrosion protection for steel substrates during construction of projects. Besides providing a certain anticorrosion function, the shop primer also needs to have good adhesive force with the subsequent primer for convenient construction.
Conventional shop primers are solvent-borne paints based on ethyl silicate hydrolysates and zinc dust, which contain significant amounts of volatile organic solvents and which, when used, can have an adverse effect on the environment. With the increasing emphasis of the national environmental protection, solvent-type shop primer can not meet the new demands of the market, and the waterborne is an important development direction of the shop primer.
The water-based shop primer is generally formed by using water-based alkali metal silicate, silica sol and zinc powder as main raw materials and forming an inorganic network structure of Si-O-Si through hydrolysis and solidification of the alkali metal silicate. However, the inorganic network structure has the defect of larger brittleness, and the alkali metal silicate contains a large amount of alkali metal cations, and the alkali metal cations still remain in a paint film after hydrolysis and solidification, so that the corrosion resistance of the coating and the adhesive force with a next coating can be affected.
In order to solve the above problems, the prior art generally adopts a water-based organic resin or emulsion modification mode to reduce the content of alkali metal cations in the coating and realize the toughening modification of the coating.
For example, chinese patent document CN108300052A discloses a self-curing weldable water-based shop primer and a preparation method thereof, wherein the self-curing weldable water-based shop primer comprises a base material and a curing agent, the base material comprises 10-100 parts of zinc powder, 0-60 parts of mica iron oxide, 0-30 parts of filler, 30-100 parts of curing agent, 0-60 parts of modified emulsion, 0-1 part of fumed silica, 0-1 part of wetting agent and 0-8 parts of water. The water-based shop primer with excellent performance is prepared by modifying lithium potassium silicate solution by special emulsion.
The Chinese patent document CN109943109A discloses a water-based shop primer composition, which comprises a base material and a curing agent, wherein the base material comprises, by weight, 30-50% of zinc powder, 20-30% of ferrophosphorus powder, 15-20% of quartz powder and 15-20% of filler. The curing agent comprises 50-70% of silicate solution, 13-23% of carbon titanium cage resin, 0.2-0.5% of leveling agent, 0.2-0.5% of wetting agent, 0.2-0.5% of defoaming agent and 14-26% of water, and the high temperature resistance of the coating is improved and the adhesive force with a subsequent coating is improved through modification of the carbon titanium cage resin emulsion.
Chinese patent document CN110982312a discloses a water-based shop primer with excellent initial water resistance and a preparation method thereof. The anti-rust paint comprises a component A and a component B, wherein the component A comprises zinc powder, an anti-rust filler and a filler, and the component B comprises potassium silicate, lithium silicate, silica sol, aqueous hyperbranched resin, an auxiliary agent and water. The crosslinking density of the coating is improved by modifying the water-based hyperbranched resin.
The process reduces the dosage of alkali metal silicate in the formula by introducing aqueous organic resin or emulsion, but still has the problems that alkali metal cations remain in a paint film and the corrosion resistance of the paint film and the adhesive force of a subsequent coating are affected.
Disclosure of Invention
In order to solve the problem of alkali metal cation residue after the existing water-based shop primer is cured, the invention provides a water-based shop primer which comprises a first component and a second component, wherein the first component comprises zinc powder and a filler, and the second component comprises ethyl silicate, polyethylene glycol, an acidic solution and deionized water.
Further, the component A comprises, by mass, 25-60 parts of zinc powder and 40-75 parts of filler.
Further, the component B comprises 20-30 parts by mass of ethyl silicate, 1-9.7 parts by mass of polyethylene glycol, 0.3-0.6 part by mass of acidic solution and 65-70 parts by mass of deionized water.
Further, the fineness of the zinc powder is 500-1500 meshes.
Further, the filler is one or more of ferrophosphorus powder, composite ferrotitanium powder, zinc phosphate, zinc oxide and iron oxide red.
Further, the polyethylene glycol is an oligomer with a molecular weight less than or equal to 600.
Further, the acidic solution is one or more of sulfuric acid solution, hydrochloric acid solution and nitric acid solution.
Further, the concentration of the acidic solution is 0.5-1 mol/L.
Further, the mass ratio of the component A to the component B is (2-4): 1.
The invention also provides a preparation method of the water-based shop primer, which comprises the following preparation methods of the component A and the component B:
The preparation method of the component A comprises adding zinc powder and filler into a preparation container, and mixing;
the preparation method of the component B comprises the steps of firstly mixing ethyl silicate and polyethylene glycol, heating the mixture to 50-70 ℃, slowly dripping an acidic solution into the mixture under the stirring condition, reacting for 20-60min under the heat preservation, cooling to room temperature, and adding water for dilution.
Preferably, the stirring speed is 200-400r/min.
Preferably, the acidic solution is added dropwise within 10-30 min.
Compared with the prior art, the water-based workshop primer provided by the invention has the following beneficial effects:
According to the invention, the alcohol-soluble ethyl silicate is subjected to hydrophilic modification by polyethylene glycol to obtain the water-soluble modified ethyl silicate, so that the introduction of alkali metal is avoided, the problems of initial water resistance and subsequent coating adhesion reduction caused by alkali metal ion residues in a common alkali metal silicate system are solved, and when the water-based shop primer is mixed, the pH value of the system is changed from weak acid to alkaline along with the addition of zinc powder, and the ethyl silicate is further hydrolyzed, so that a paint film is obtained by curing. The water-based shop primer provided by the technical scheme of the invention has the advantages that the film formation is more compact, the corrosion resistance, the weather resistance and the matched adhesive force of the coating are excellent, the coating is used for temporary protection of steel plates in ships and large-scale industries, the damage rate of the steel plates can be reduced, the adhesive force with a next coating is improved, the subsequent construction cost is reduced, and the overall construction quality is improved.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a water-based workshop primer, which comprises a first component and a second component, wherein the first component comprises zinc powder and a filler, and the second component comprises ethyl silicate, polyethylene glycol, an acidic solution and deionized water.
Wherein the component A comprises 25-60 parts of zinc powder and 40-75 parts of filler by mass.
The component B comprises, by mass, 20-30 parts of ethyl silicate, 1-9.7 parts of polyethylene glycol, 0.3-0.6 part of an acidic solution and 65-70 parts of deionized water.
The fineness of the zinc powder is 500-1500 meshes.
The filler is one or more of ferrophosphorus powder, composite ferrotitanium powder, zinc phosphate, zinc oxide and iron oxide red.
The polyethylene glycol is an oligomer with the molecular weight less than or equal to 600.
The acidic solution is one or more of sulfuric acid solution, hydrochloric acid solution and nitric acid solution.
The concentration of the hydrochloric acid solution is 0.5-1 mol/L.
The mass ratio of the component A to the component B is (2-4): 1.
The invention also provides a preparation method of the water-based workshop primer, which comprises the following preparation methods of the component A and the component B:
The preparation method of the component A comprises adding zinc powder and filler into a preparation container, and mixing;
the preparation method of the component B comprises the steps of firstly mixing ethyl silicate and polyethylene glycol, heating the mixture to 50-70 ℃, slowly dripping an acidic solution into the mixture under the stirring condition, reacting for 20-60min under the heat preservation, cooling to room temperature, and adding water for dilution.
Preferably, the stirring speed is 200-400r/min.
Preferably, the acidic solution is added dropwise within 10-30 min.
The invention also provides the following examples and comparative examples of formulations (unit: parts by weight), as shown in Table 1 below:
TABLE 1
Wherein, the zinc powder of the example 1 is 500 meshes, the zinc powder of the example 2 is 800 meshes, and the zinc powder of the example 3 is 1500 meshes;
The filler in the embodiment 1 is ferrophosphorus powder, the filler in the embodiment 2 is a composition of composite ferrotitanium powder and zinc phosphate mixed according to a mass ratio of 1:1, and the filler in the embodiment 3 is a composition of zinc oxide and iron oxide red mixed according to a mass ratio of 1:1;
the polyethylene glycol of example 1 has a molecular weight of 300, the polyethylene glycol of example 2 has a molecular weight of 400, and the polyethylene glycol of example 3 has a molecular weight of 600;
The acidic solution of example 1 was 0.5 mol/L hydrochloric acid solution, the acidic solution of example 2 was 0.7 mol/L hydrochloric acid solution, and the acidic solution of example 3 was 1mol/L hydrochloric acid solution.
Comparative example 1 differs from example 1 only in that no polyethylene glycol was added, and the remainder was identical to example 1.
The raw materials are all commercial products or are prepared by a conventional method.
The above examples and comparative examples were prepared as follows:
The preparation method of the component A comprises the following steps:
And weighing zinc powder and filler according to the formula amount, and mixing for 10min on a shaker to obtain the component A.
The preparation method of the component B comprises the following steps:
And (3) weighing ethyl silicate and polyethylene glycol according to the formula amount, mixing, heating the mixture to 60 ℃, slowly dropwise adding a hydrochloric acid solution into the mixture at the stirring speed of 300r/min, dropwise adding the hydrochloric acid solution within 20min, then, after heat preservation for 30min at 60 ℃, cooling to room temperature, and adding the formula amount of water for dilution to obtain the component B.
And uniformly mixing the component A and the component B to obtain the water-based workshop primer. Wherein the mass ratio of the components A and B in the example 1 and the comparative example 1 is 4:1, the mass ratio of the components A and B in the example 2 is 3:1, and the mass ratio of the components A and B in the example 3 is 2:1.
Comparative example 2
The water-based shop primer prepared according to the Chinese patent document CN 109943109A.
The above examples and comparative examples were subjected to performance tests, and the test results are shown in table 2.
TABLE 2
The method comprises the steps of spraying solvent type epoxy antirust paint on the surface of the water-based shop primer after the construction of the water-based shop primer is completed for 24 hours, curing for 7 days at normal temperature, and then carrying out adhesion test of a matched coating;
"/" indicates that there is no relevant data.
As can be seen from Table 2, the water-based shop primer provided by the invention has good corrosion resistance and adhesion with a subsequent coating in practical use, and meets the temporary protection requirements of ships and large-scale industrial steel substrates in the aspects of paint film thickness, drying time, salt spray resistance, weather resistance and matched adhesion. Comparative example 1 in-can layering of the coating occurred because hydrophilic modification was performed without polyethylene glycol added, and ethyl silicate was not miscible with water. Comparing the examples with comparative example 2, it can be seen that the water-based shop primer provided by the invention has more excellent weather resistance and mating adhesion.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.
Claims (3)
1. The water-based workshop primer is characterized by comprising a first component and a second component, wherein the first component comprises zinc powder and filler, the second component comprises ethyl silicate, polyethylene glycol, an acidic solution and deionized water, the first component comprises, by mass, 25-60 parts of zinc powder and 40-75 parts of filler, the second component comprises, by mass, 20-30 parts of ethyl silicate, 1-9.7 parts of polyethylene glycol, 0.3-0.6 part of acidic solution and 65-70 parts of deionized water, and the concentration of the acidic solution is 0.5-1mol/L;
The preparation method of the component B comprises mixing ethyl silicate and polyethylene glycol, heating the mixture to 50-70deg.C, slowly dripping acidic solution into the mixture under stirring, reacting for 20-60min under heat preservation, cooling to room temperature, and diluting with water to obtain the final product;
the filler is one or more of ferrophosphorus powder, composite ferrotitanium powder, zinc phosphate, zinc oxide and iron oxide red;
the polyethylene glycol is an oligomer with the molecular weight less than or equal to 600;
the acidic solution is one or more of sulfuric acid solution, hydrochloric acid solution and nitric acid solution;
the mass ratio of the component A to the component B is (2-4): 1.
2. The water-based shop primer according to claim 1, wherein the fineness of the zinc powder is 500-1500 mesh.
3. A method of preparing a waterborne shop primer according to any of claims 1-2, comprising the steps of:
The preparation method of the component A comprises adding zinc powder and filler into a preparation container, and mixing;
the preparation method of the component B comprises the steps of firstly mixing ethyl silicate and polyethylene glycol, heating the mixture to 50-70 ℃, slowly dripping an acidic solution into the mixture under the stirring condition, reacting for 20-60min under the heat preservation, cooling to room temperature, and adding water for dilution.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311121612.1A CN117025005B (en) | 2023-09-01 | 2023-09-01 | Water-based workshop primer and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311121612.1A CN117025005B (en) | 2023-09-01 | 2023-09-01 | Water-based workshop primer and preparation method thereof |
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| CN117025005A CN117025005A (en) | 2023-11-10 |
| CN117025005B true CN117025005B (en) | 2025-08-19 |
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| CN119081500A (en) * | 2024-09-29 | 2024-12-06 | 厦门双瑞船舶涂料有限公司 | A modified water-based shop primer and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB958787A (en) * | 1960-12-14 | 1964-05-27 | Carboline Co | Improvements in protective coating materials and methods of making such materials |
| CN109071967A (en) * | 2016-01-29 | 2018-12-21 | 佐敦有限公司 | shop primer |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109735182A (en) * | 2019-01-26 | 2019-05-10 | 宁波市鄞州艾博化工科技有限公司 | A kind of high anti-corrosion anticorrosion galvanizing layer sealer |
| CN116162366B (en) * | 2021-11-25 | 2023-12-26 | 中海油常州涂料化工研究院有限公司 | Water-based inorganic zinc silicate paint and preparation method thereof |
| CN114196281A (en) * | 2021-12-10 | 2022-03-18 | 江南大学 | Method for preparing anti-fog transparent coating by modified silane coupling agent and hydrophilic copolymer |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB958787A (en) * | 1960-12-14 | 1964-05-27 | Carboline Co | Improvements in protective coating materials and methods of making such materials |
| CN109071967A (en) * | 2016-01-29 | 2018-12-21 | 佐敦有限公司 | shop primer |
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