CN114621648A - Water-based single-component anticorrosive primer and preparation method thereof - Google Patents
Water-based single-component anticorrosive primer and preparation method thereof Download PDFInfo
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- CN114621648A CN114621648A CN202011458672.9A CN202011458672A CN114621648A CN 114621648 A CN114621648 A CN 114621648A CN 202011458672 A CN202011458672 A CN 202011458672A CN 114621648 A CN114621648 A CN 114621648A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 67
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 239000004925 Acrylic resin Substances 0.000 claims abstract description 27
- 229920000178 Acrylic resin Polymers 0.000 claims abstract description 27
- 229920000180 alkyd Polymers 0.000 claims abstract description 22
- 239000000049 pigment Substances 0.000 claims abstract description 20
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 15
- 239000000945 filler Substances 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 12
- 239000002562 thickening agent Substances 0.000 claims abstract description 12
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 11
- 239000002270 dispersing agent Substances 0.000 claims abstract description 10
- 239000008367 deionised water Substances 0.000 claims abstract description 8
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 8
- 239000000080 wetting agent Substances 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims description 19
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 claims description 8
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 6
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 claims description 6
- 239000003112 inhibitor Substances 0.000 claims description 6
- VHSHLMUCYSAUQU-UHFFFAOYSA-N 2-hydroxypropyl methacrylate Chemical compound CC(O)COC(=O)C(C)=C VHSHLMUCYSAUQU-UHFFFAOYSA-N 0.000 claims description 5
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 5
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 claims description 5
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 5
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 5
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 5
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 238000009775 high-speed stirring Methods 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 4
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical group [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims description 4
- 229910000165 zinc phosphate Inorganic materials 0.000 claims description 4
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 230000003472 neutralizing effect Effects 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 2
- UEEJHVSXFDXPFK-UHFFFAOYSA-O N-dimethylethanolamine Chemical compound C[NH+](C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-O 0.000 claims description 2
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 2
- 125000000129 anionic group Chemical group 0.000 claims description 2
- 239000006229 carbon black Substances 0.000 claims description 2
- 238000006555 catalytic reaction Methods 0.000 claims description 2
- 239000010941 cobalt Substances 0.000 claims description 2
- 229910017052 cobalt Inorganic materials 0.000 claims description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims description 2
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000010445 mica Substances 0.000 claims description 2
- 229910052618 mica group Inorganic materials 0.000 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 230000035484 reaction time Effects 0.000 claims description 2
- 239000001038 titanium pigment Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 2
- 239000002987 primer (paints) Substances 0.000 abstract description 28
- 238000001035 drying Methods 0.000 abstract description 20
- 150000003839 salts Chemical class 0.000 abstract description 7
- 239000007921 spray Substances 0.000 abstract description 7
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 2
- 239000003973 paint Substances 0.000 description 21
- 230000000052 comparative effect Effects 0.000 description 9
- 239000012855 volatile organic compound Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 8
- 239000004593 Epoxy Substances 0.000 description 7
- 230000007797 corrosion Effects 0.000 description 6
- 238000003618 dip coating Methods 0.000 description 4
- 150000002148 esters Chemical class 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- UEEJHVSXFDXPFK-UHFFFAOYSA-N N-dimethylaminoethanol Chemical compound CN(C)CCO UEEJHVSXFDXPFK-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000012972 dimethylethanolamine Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- IAXXETNIOYFMLW-COPLHBTASA-N [(1s,3s,4s)-4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl] 2-methylprop-2-enoate Chemical compound C1C[C@]2(C)[C@@H](OC(=O)C(=C)C)C[C@H]1C2(C)C IAXXETNIOYFMLW-COPLHBTASA-N 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000006115 industrial coating Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 229940119545 isobornyl methacrylate Drugs 0.000 description 1
- 239000003002 pH adjusting agent Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- 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
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
- C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09D133/062—Copolymers with monomers not covered by C09D133/06
- C09D133/068—Copolymers with monomers not covered by C09D133/06 containing glycidyl groups
-
- 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
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/328—Phosphates of heavy metals
Landscapes
- 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
The invention discloses a water-based single-component anticorrosive primer which comprises the following components in parts by weight: 5-30 parts of water-based alkyd resin, 5-40 parts of deionized water, 0.5-2 parts of a drier, 0.5-3 parts of a pH regulator, 0.2-2 parts of an anti-settling agent, 0.5-2 parts of a dispersant, 0.1-1 part of a defoaming agent, 1-10 parts of an anti-rust pigment, 5-50 parts of a pigment and filler, 5-40 parts of water-based diluted acrylic resin, 0.5-2 parts of an anti-flash rust agent, 0.1-0.5 part of a base material wetting agent and 0.1-1 part of a thickening agent. The primer coating has short drying time, can be surface-dried within 15min and is solid-dried within 4h, and the primer coating has good adhesive force, good salt spray resistance and low VOC content. The invention also discloses a preparation method of the water-based single-component anticorrosive primer, which is simple to operate, energy-saving, environment-friendly, low in cost and suitable for large-scale production.
Description
Technical Field
The invention relates to the field of coatings, and particularly relates to a water-based single-component anticorrosive primer and a preparation method thereof.
Background
At present, the water-based bi-component epoxy primer is matched with the water-based bi-component polyurethane finish paint, so that the corrosion prevention requirement in the field of water-based industrial paint can be well met, but the defects of VOC (volatile organic compound) more than 150g/L and high cost exist, the water-based bi-component epoxy primer is particularly suitable for dip-coating construction of parts with irregular shapes on railway trucks, and the application of the bi-component water-based paint is difficult. Therefore, it is important to develop a water-based single-component anticorrosive primer with good anticorrosive performance, fast drying and low VOC content.
In the water-based industrial coating system, single-component water-based acrylic paint, water-based alkyd paint and water-based epoxy ester paint are widely applied. The water-based acrylic paint has the advantages of quick drying but poor corrosion resistance, and the water-based alkyd paint and the water-based epoxy paint have better corrosion resistance but slow drying. The water-based acrylic paint and the water-based alkyd paint (or the water-based epoxy ester paint) are mixed, so that the balance problem between the drying property and the corrosion resistance can be well solved.
The patent CN09439090A discloses that the salt spray resistance test of the quick-drying environment-friendly water-based paint prepared from water-diluted acrylic resin and water-based epoxy ester resin can only reach 96 h. The patent CN11133460A adopts the quick-drying environment-friendly water-based dip-coating primer prepared from water-diluted acrylic resin and water-based epoxy ester resin, the VOC content is low, and the salt spray test can reach 240 h.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming the defects and defects in the background technology, providing the water-based single-component anticorrosive primer which has good anticorrosive performance, quick drying time, low VOC content, excellent adhesive force and good storage stability and can meet the dip-coating construction of railway wagon accessories, and also providing the preparation method thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the water-based single-component anticorrosive primer comprises the following raw materials in parts by mass:
preferably, the water-thinned acrylic resin is formed by copolymerizing methyl methacrylate, methacrylic acid, butyl acrylate, beta-hydroxypropyl methacrylate and glycidyl methacrylate under the catalysis of dibenzoyl peroxide.
More preferably, the aqueous dilution type acrylic resin is formed by mixing and copolymerizing the following raw materials in parts by mass:
preferably, the mass solid content of the waterborne alkyd resin is 70-80%, and the acid value is 26-30 mgKOH/g; for example, the waterborne alkyd resin may be selected from URADILAZ3531G3Z-75XP waterborne air-drying alkyd resin from Dismann, Netherlands.
Preferably, the dispersant is an anionic acrylate polymer; for example, the dispersant may be selected from hyperdispersant 303 of new materials technologies, ltd, guangzhou dun.
Preferably, the pH regulator is any one or more of ammonia water, N-dimethylethanolamine and triethylamine; for example, the pH adjusting agent may be DMEA from Heimax.
Preferably, the anti-settling agent is poly-magnesium aluminum silicate; for example, the anti-settling agent can be selected from SHV model poly-magnesium aluminum silicate, a new material of hui-throwing minerals, manufactured by suzhou nations.
Preferably, the defoaming agent is an acrylic defoaming agent; for example, from Bassfer may be selected
ST2437 antifoaming agent.
Preferably, the rust inhibitive pigment is zinc phosphate, such as zinc phosphate A-S-7 by Acordid New materials technology, Inc., Changzhou.
Preferably, the pigment filler comprises pigment and filler, wherein the pigment comprises one or more of iron oxide red, carbon black and titanium pigment, and the filler comprises one or more of talcum powder, barium sulfate, silica micropowder and mica powder.
Preferably, the thickener is a polyurethane thickener, such as PUR62 thickener from minling, germany.
Preferably, the substrate wetting agent is a polyether siloxane copolymer, such as WET 270 or BYK 346 from degussa.
Preferably, the flash rust inhibitor is SC2190Z type flash rust inhibitor; for example, the flash rust inhibitor can be selected from Sc2190Z model of Jiangsu Trihong nanotechnology Co.
Preferably, the drier is a cobalt drier; for example, T2012 siccator from xinhong science ltd, shoji may be selected.
According to the invention, the water-based alkyd resin and the water-diluted acrylic resin are compounded to be used as film-forming substances, wherein the water-based alkyd resin can improve the corrosion resistance of a paint film, the water-diluted acrylic resin can shorten the surface drying time and the actual drying time of the paint film, and the water-based single-component anticorrosive primer has the advantages of good corrosion resistance and fast drying by combining with other reagents, and has excellent storage stability, low VOC content and good paint film adhesion.
Based on a general inventive concept, the invention also provides a preparation method of the water-based single-component anticorrosive primer, which comprises the following steps:
(1) uniformly stirring the water-based alkyd resin, the drier and the pH regulator, sequentially adding deionized water, an anti-settling agent, a dispersing agent, a defoaming agent, an anti-rust pigment and pigment filler, uniformly stirring, and grinding;
(2) and (2) under the stirring state, sequentially adding water-diluted acrylic resin, a base material wetting agent, an anti-flash rust agent and a thickening agent into the mixture obtained in the step (1), adjusting the viscosity, and filtering to obtain the water-based single-component anticorrosive primer.
In the preparation method, preferably, the grinding is carried out until the fineness is less than or equal to 50 mu m, the stirring speed is 500-800 r/min, the viscosity is adjusted to 2.5-4 Pa.S, and the pH value of the water-based single-component anticorrosive primer is 8-9.
Preferably, the preparation method of the water-dilutable acrylic resin comprises the following steps: mixing isopropanol and ethylene glycol monobutyl ether to form a base solution, heating to a reaction temperature, slowly dripping a mixed solution of methyl methacrylate, methacrylic acid, butyl acrylate, beta-hydroxypropyl methacrylate, glycidyl methacrylate and dibenzoyl peroxide into the base solution under low-speed stirring, carrying out heat preservation reaction for a period of time, cooling to 60 ℃, neutralizing with a pH regulator under stirring, and adding deionized water under high-speed stirring to obtain the water-diluted acrylic resin.
More preferably, the reaction temperature is 80-90 ℃, the low-speed stirring speed is 300-500 r/min, the dripping time is 3.5-4 h, the heat preservation reaction time is 3-3.5 h, and the high-speed stirring speed is 500-800 r/min.
Compared with the prior art, the invention has the beneficial effects that:
1. the water-based single-component anticorrosive primer disclosed by the invention adopts the water-based alkyd resin and the water-diluted acrylic resin to be compounded as a film-forming substance, has the advantages of good anticorrosive property and quick drying, and is excellent in storage stability and good in paint film adhesion.
2. The water-based single-component anticorrosive primer disclosed by the invention has the advantages that the paint film drying time is short, the surface drying time is 15min, and the actual drying time is 4 h; the corrosion resistance is good and can reach 500 h; the primer is environment-friendly, and the VOC is less than or equal to 120 g/L.
3. The preparation method disclosed by the invention is simple to operate, energy-saving, environment-friendly, low in cost and suitable for large-scale production.
Detailed Description
In order to facilitate an understanding of the present invention, the present invention will be described more fully and in detail with reference to the preferred embodiments, but the scope of the present invention is not limited to the specific embodiments below.
Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
For a further understanding of the present invention, preferred embodiments of the present invention are described below with reference to examples.
The addition amounts of the raw materials of the water-based single-component anticorrosive primer (examples 1-3) and the comparative example are shown in the following table 1:
TABLE 1 waterborne one-component anticorrosion primer examples and comparative examples
| Raw materials/addition (in parts by mass) | Example 1 | Example 2 | Example 3 | Comparative example 1 | Comparative example 2 |
| Aqueous alkyd resin | 15 | 15 | 12 | 15 | 21 |
| Drier | 1.0 | 1.0 | 0.8 | 1.0 | 1.5 |
| pH regulator | 1.5 | 1.5 | 1.2 | 1.5 | 2 |
| Deionized water | 25 | 25 | 22 | 25 | 31 |
| Anti-settling agent | 0.5 | 0.5 | 0.4 | 0.5 | 0.5 |
| Dispersing agent | 1.0 | 1.0 | 1.2 | 1.0 | 0.5 |
| Defoaming agent | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 |
| Rust-proof pigment | 8 | 8 | 8 | 8 | 8 |
| Pigment (I) | 12 | 12 | 12 | 12 | 12 |
| Filler material | 10 | 10 | 10 | 10 | 15 |
| Water-thinned acrylic resin | 25 | 30 | 30 | 25 | 0 |
| Substrate wetting agent | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 |
| Flash rust inhibitor | 1 | 1 | 1 | 1 | 1 |
| Thickening agent | 0.5 | 0.5 | 0.5 | 0.3 | 1.0 |
Wherein, the water-diluted acrylic resin in the embodiments 1-3 is obtained by copolymerization of the raw materials according to the following table 2;
TABLE 2 Water-dilutable acrylic resin preparation starting materials
The water-reducible acrylic resin in comparative example 1 is a commercially available water-reducible acrylic resin. In addition, the types and preparation methods of other raw materials used in examples 1 to 3 and comparative examples 1 to 2 were the same.
The water-based alkyd resin is URADILAZ3531G3Z-75XP water-based air-dried alkyd resin of Dusmann, Netherlands, the solid content of the alkyd resin is 70-80%, and the acid value of the alkyd resin is 26-30 mgKOH/G;
the dispersant is a hyper dispersant 303 of Guangzhou Dundon new material science and technology limited company;
the pH regulator is DMEA of Heimex;
the anti-settling agent is SHV type poly-magnesium aluminum silicate of New mineral Material Co., Ltd, Huiyu, China, Suzhou;
the foaming agent is from Bassfer
ST2437 antifoaming agent;
the anti-flash rust agent is SC2190Z type anti-flash rust agent of Jiangsu and Sanhong nanometer science and technology Limited;
the substrate wetting agent is WET 270 of Degussa company;
the drier is T2012 drier of Xinhong science and technology Limited company in Tanshou city;
the rust-proof pigment is zinc phosphate A-S-7 of New Material science and technology Limited of Changzhou Archider;
the pigment is 190 iron oxide red of New Material Co., Ltd, double-horse century, Hunan Tan City; the filler is 1250-mesh quasi-spherical silica micropowder of New Material science and technology Limited of Hunan Jinma;
the thickener is PUR62 thickener from Mingling, Germany.
The preparation method of the water-based single-component anticorrosive primer comprises the following steps:
(1) uniformly stirring the water-based alkyd resin, the drier and the pH regulator, sequentially adding deionized water, an anti-settling agent, a dispersing agent, a defoaming agent, an anti-rust pigment and pigment filler, uniformly stirring at a speed of 500-800 r/min, and grinding until the fineness is less than or equal to 50 microns;
(2) and (2) sequentially adding water-diluted acrylic resin, a base material wetting agent, an anti-flash rust agent and a thickening agent into the mixture obtained in the step (1) under a stirring state at a speed of 500-800 r/min, adjusting the viscosity to 2.5-4 Pa.S, controlling the pH value to 8-9, detecting the viscosity fineness and passing the pH value, and filtering to obtain the aqueous single-component anticorrosive primer.
The preparation method of the water-diluted acrylic resin comprises the following steps:
adding isopropanol and ethylene glycol monobutyl ether into a four-mouth reaction bottle, wherein a reflux condenser pipe, a mechanical stirrer, a constant-pressure dropping funnel and a thermometer are arranged on the four-mouth reaction bottle, heating to 80-85 ℃, slowly dropping a mixed solution of methyl methacrylate, methacrylic acid, butyl acrylate, beta-hydroxypropyl methacrylate, glycidyl methacrylate, isobornyl methacrylate and dibenzoyl peroxide into the four-mouth reaction bottle under stirring at 300-500 r/min for 3.5-4 h, carrying out heat preservation reaction for 3-3.5 h, cooling to 60 ℃, neutralizing with a pH regulator under stirring, and adding deionized water under high-speed stirring at 500-800 r/min to obtain the water-diluted acrylic resin.
The performance test of each of the aqueous single-component anticorrosion primers obtained in examples 1 to 3 and comparative examples 1 to 2 was performed, and the test results are shown in table 3.
TABLE 3 comparison of main Performance test results for aqueous one-component anticorrosion primer
As can be seen from table 3 above: (1) the amount of the water-thinned acrylic resin or the amount of the water-based alkyd resin in the embodiments 1-3 is increased, so that the surface drying time and the actual drying time of the finally obtained water-based single-component anticorrosive primer are obviously shortened, and the salt spray resistance of the water-based single-component anticorrosive primer is deteriorated along with the decrease of the amount of the water-based alkyd resin; (2) comparative example 2 no water-dilutable acrylic resin was added and only paint was made with aqueous alkyd resin, the tack coat time and the tack coat time were extended, but the paint film had better salt spray resistance; (3) in comparative example 1, the salt spray resistance and the storage stability were poor when a commercially available water-dilutable acrylic resin was used; (4) the VOC content in the embodiments 1-3 is less than 120g/L, and the water-based technical standard of the railway wagon is met.
In general, the water-based single-component anticorrosive primer disclosed by the invention has the advantages that the coating film drying time is short, the surface drying can be realized within 15min, the surface drying is realized within 4h, the paint film adhesion is good, the salt spray resistance is good, the VOC content is low, and the dip-coating construction of railway wagon accessories can be met.
Claims (10)
1. The water-based single-component anticorrosive primer is characterized by comprising the following raw materials in parts by mass:
2. the waterborne one-component anticorrosion primer according to claim 1, wherein the water-dilutable acrylic resin is formed by copolymerizing methyl methacrylate, methacrylic acid, butyl acrylate, beta-hydroxypropyl methacrylate and glycidyl methacrylate under the catalysis of dibenzoyl peroxide.
3. The water-based single-component anticorrosion primer as claimed in claim 2, wherein the water-based diluted acrylic resin is formed by mixing and copolymerizing the following raw materials in parts by mass:
4. the water-based single-component anticorrosion primer as claimed in claim 1, wherein the mass solid content of the water-based alkyd resin is 70-80%, and the acid value is 26-30 mgKOH/g.
5. The waterborne one-component anticorrosion primer according to any one of claims 1 to 4, wherein the dispersant is an anionic acrylate polymer; the pH regulator is any one or more of ammonia water, N dimethylethanolamine and triethylamine; the anti-settling agent is poly-magnesium aluminum silicate; the defoaming agent is an acrylic defoaming agent.
6. The water-based single-component anti-corrosion primer according to any one of claims 1 to 4, wherein the anti-corrosion pigment is zinc phosphate; the pigment filler comprises pigment and filler, wherein the pigment comprises one or more of iron oxide red, carbon black and titanium pigment, and the filler comprises one or more of talcum powder, barium sulfate, silica micropowder and mica powder; the thickening agent is a polyurethane thickening agent; the base material wetting agent is polyether silicon-oxygen copolymer; the flash rust inhibitor is an SC2190Z type flash rust inhibitor; the drier is a cobalt drier.
7. A method for preparing the water-based single-component anti-corrosive primer according to any one of claims 1 to 6, which is characterized by comprising the following steps:
(1) uniformly stirring the water-based alkyd resin, the drier and the pH regulator, sequentially adding deionized water, an anti-settling agent, a dispersing agent, a defoaming agent, an anti-rust pigment and pigment filler, uniformly stirring, and grinding;
(2) and (2) under the stirring state, sequentially adding water-diluted acrylic resin, a base material wetting agent, an anti-flash rust agent and a thickening agent into the mixture obtained in the step (1), adjusting the viscosity, and filtering to obtain the water-based single-component anticorrosive primer.
8. The preparation method of the waterborne single-component anticorrosive primer according to claim 7, wherein the grinding is carried out until the fineness is less than or equal to 50 μm, the stirring speed is 500-800 r/min, the viscosity is adjusted to 2.5-4 Pa-S, and the pH value of the waterborne single-component anticorrosive primer is 8-9.
9. The production method according to claim 7 or 8, characterized in that the production method of the water-dilutable acrylic resin comprises the steps of: mixing isopropanol and ethylene glycol monobutyl ether to form a base solution, heating to a reaction temperature, slowly dripping a mixed solution of methyl methacrylate, methacrylic acid, butyl acrylate, beta-hydroxypropyl methacrylate, glycidyl methacrylate and dibenzoyl peroxide into the base solution under low-speed stirring, carrying out heat preservation reaction for a period of time, cooling to 60 ℃, neutralizing with a pH regulator under stirring, and adding deionized water under high-speed stirring to obtain the water-diluted acrylic resin.
10. The preparation method according to claim 9, wherein the reaction temperature is 80-90 ℃, the low-speed stirring speed is 300-500 r/min, the dripping time is 3.5-4 h, the heat preservation reaction time is 3-3.5 h, and the high-speed stirring speed is 500-800 r/min.
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| CN115011190A (en) * | 2022-07-25 | 2022-09-06 | 河北冀中漆业有限公司 | Water-based low-temperature quick-drying acrylate coating and preparation method thereof |
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| CN115011190A (en) * | 2022-07-25 | 2022-09-06 | 河北冀中漆业有限公司 | Water-based low-temperature quick-drying acrylate coating and preparation method thereof |
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