CN113045977A - Water-based acrylic polyurethane coating for assembly type building steel structure and preparation method thereof - Google Patents
Water-based acrylic polyurethane coating for assembly type building steel structure and preparation method thereof Download PDFInfo
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- CN113045977A CN113045977A CN202110285721.1A CN202110285721A CN113045977A CN 113045977 A CN113045977 A CN 113045977A CN 202110285721 A CN202110285721 A CN 202110285721A CN 113045977 A CN113045977 A CN 113045977A
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
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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
- 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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- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- 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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
Abstract
The invention relates to the technical field of water-based paint, in particular to water-based acrylic polyurethane paint for an assembled building steel structure and a preparation method thereof, wherein the paint comprises a component A and a component B, the component A comprises a dispersing agent, a defoaming agent, a thickening agent, a cosolvent, titanium dioxide, barium sulfate, a pigment, a water-based hydroxyl acrylic dispersion, a water-based hydroxyl acrylic emulsion, a water-based acrylic emulsion and deionized water, and the component B comprises a curing agent; the method comprises the preparation of the component A, the preparation of the component B and the mixing of the component A and the component B. The coating disclosed by the invention has extremely low VOC content, good salt spray resistance, construction property, weather resistance, decoration property and higher hardness, and can meet the dual requirements of the coating for the steel structure of the fabricated building on performance and environmental protection.
Description
Technical Field
The invention relates to the technical field of water-based paint, in particular to water-based acrylic polyurethane paint for an assembly type building steel structure and a preparation method thereof.
Background
The assembly type building is a new technology in the building field, has the technical characteristics of safety, energy conservation and environmental protection, but the coating industry matched with the assembly type building is not suitable for the development of the assembly type building, and has some problems.
At present, the coating of the assembly type building steel structure is mainly solvent type coating, and the VOC of the traditional solvent type acrylic polyurethane coating is about 400 g/L. Some coatings adopt water-based coatings, but the coatings are coatings with strong universality and have high VOC content, so that a large amount of organic matters volatilize during coating, the environment is polluted, and harmful substances in a coated film slowly volatilize after coating and can continuously influence human health. Meanwhile, the VOC of the water-based acrylic polyurethane coating for the steel structure of the existing fabricated building is obviously reduced compared with that of a solvent-based coating, but the construction performance and the coating performance of the water-based acrylic polyurethane coating are damaged.
Therefore, the water-based paint for the assembled building steel structure has important significance in ensuring the protective performance and the decorative requirement of the coating film and simultaneously greatly reducing the VOC content.
Disclosure of Invention
Aiming at the technical problem that the VOC content, the film protection performance and the decoration performance of the existing coating for the steel structure of the fabricated building are difficult to simultaneously consider, the invention provides the water-based acrylic polyurethane coating for the steel structure of the fabricated building and the preparation method thereof.
In a first aspect, the invention provides a water-based acrylic polyurethane coating for a fabricated building steel structure, which is a two-component coating and comprises a component A and a component B,
the component A comprises the following raw materials in parts by weight:
1-3 parts of dispersing agent, 0.1-0.2 part of defoaming agent, 0.2-0.8 part of thickening agent, 0-10 parts of cosolvent, 10-15 parts of titanium dioxide, 10-15 parts of barium sulfate, 3-8 parts of pigment, 0-40 parts of waterborne hydroxy acrylic acid dispersoid, 0-40 parts of waterborne hydroxy acrylic acid emulsion, 0-20 parts of waterborne acrylic acid emulsion and 0-40 parts of deionized water;
the component B comprises the following raw materials in parts by weight:
100 parts of curing agent.
Further, in the component A, the dispersant is byk 190.
Further, in the component A, the defoaming agent is an organic silicon defoaming agent.
Further, in the component A, the thickening agent is a polyurethane thickening agent, such as Hamming 299.
Furthermore, in the component A, a cosolvent is Dow dipropylene glycol methyl ether.
Further, in the component A, titanium dioxide is rutile type titanium dioxide, barium sulfate is precipitated barium sulfate, and the pigment is an environment-friendly pigment without heavy metals.
Furthermore, in the component A, the aqueous hydroxy acrylic acid dispersoid is Kadsura Bayhydrol A XP 2770, and the dispersoid has low cosolvent content, small influence on a coating system and is more environment-friendly;
the water-based hydroxy acrylic emulsion is Joncryl OH8312, and can react with polyisocyanate resin under the low VOC content, so that the film-forming property of a coating film under the low VOC content is ensured;
the water-based acrylic emulsion is a low Tg self-crosslinking acrylic emulsion, and ensures film formation performance of a coating film under low VOC.
Furthermore, in the component B, the curing agent is polyisocyanate resin, such as Costa Bayhydur XP 2655, and the curing agent can be uniformly dispersed in water and has good film-forming property with hydroxyl resin.
Further, the coating comprises a component A and a component B,
the component A comprises the following raw materials in parts by weight:
1 part of dispersing agent, 0.2 part of defoaming agent, 0.3 part of thickening agent, 10 parts of titanium dioxide, 10 parts of barium sulfate, 3 parts of pigment, 15 parts of aqueous hydroxy acrylic acid dispersoid, 35 parts of aqueous hydroxy acrylic acid emulsion, 20 parts of aqueous acrylic acid emulsion and 8.5 parts of deionized water;
the component B comprises the following raw materials in parts by weight:
100 parts of curing agent.
In a second aspect, the present invention provides a method for preparing the above waterborne acrylic polyurethane coating for prefabricated building steel structures, comprising the steps of:
s1: preparation of component A:
s11: adding a dispersing agent and deionized water into a container, stirring for 5 minutes, adding titanium dioxide, pigment and barium sulfate while stirring, adding a defoaming agent while stirring, and dispersing for 10 minutes;
s12: after the dispersion is finished, grinding the mixture by a grinder, controlling the temperature to be not higher than 60 ℃, and filtering the mixture after the grinding is carried out until the fineness is qualified;
s13: adding the water-based hydroxy acrylic acid dispersoid, the water-based hydroxy acrylic acid emulsion and the water-based acrylic acid emulsion after filtering, stirring for 15 minutes, adding the defoaming agent, the thickening agent and the cosolvent, and continuing stirring for 15 minutes;
s14: filtering, removing filter residue, and finishing the preparation of the component A;
s2: preparation of the component B:
directly filtering and filling the component B;
s3: mixing the component A and the component B:
when in use, the component A and the component B are stirred and mixed.
The beneficial effect of the invention is that,
the invention provides a water-based acrylic polyurethane coating for an assembled building steel structure, which has extremely low VOC content while ensuring excellent performance, can reduce the VOC to 0 even under the condition of not pursuing gloss, is very suitable for the field of the assembled building steel structure, surely fills the product blank in the field of the assembled building steel structure and promotes the development of the assembled building industry.
The three components of the aqueous hydroxyl acrylic acid dispersoid, the aqueous hydroxyl acrylic acid emulsion and the aqueous acrylic acid emulsion are compounded to obtain good film-forming property and the protection and decoration performance of a paint film under the lowest VOC; the aqueous hydroxyl acrylic acid dispersoid ensures that a paint film has good crosslinking density and compactness, and endows the coating with good mechanical and protective properties, but the VOC can not be controlled to a lower range by fully using the hydroxyl acrylic acid dispersoid; the hydroxyl acrylic emulsion can provide a certain crosslinking density, and simultaneously reduces VOC (volatile organic compounds), if the hydroxyl acrylic emulsion is fully used, the crosslinking density of a paint film is lower, so that the performance of the paint film is influenced; the addition of the self-film-forming acrylic emulsion ensures film-forming property and simultaneously reduces VOC content to the minimum.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A water-based acrylic polyurethane coating for an assembled building steel structure is a two-component coating, and comprises a component A and a component B,
the component A comprises the following raw materials in parts by weight:
2.5 parts of a dispersing agent (byk190), 0.1 part of an organic silicon defoaming agent, 0.8 part of a polyurethane thickener (Haiming 299), 8 parts of a cosolvent (Dow dipropylene glycol methyl ether), 12 parts of rutile titanium dioxide, 12 parts of precipitated barium sulfate, 6 parts of a pigment, 30 parts of a water-based hydroxy acrylic acid dispersion (Coxiba Bayhydrol A XP 2770), 20 parts of a water-based hydroxy acrylic acid emulsion (Pasteur Joncryl OH8312), 10 parts of a low Tg self-crosslinking water-based acrylic acid emulsion and 30 parts of deionized water;
the component B comprises the following raw materials in parts by weight:
100 parts of curing agent polyisocyanate resin (Cosmagawa Bayhydur XP 2655);
the preparation method of the coating comprises the following steps:
s1: preparation of component A:
s11: adding 2.5 parts of dispersing agent and 30 parts of deionized water into a container, stirring for 5 minutes, adding 12 parts of titanium dioxide, 6 parts of pigment and 12 parts of barium sulfate while stirring, adding 0.05 part of defoaming agent while stirring after stirring, and dispersing for 10 minutes;
s12: after dispersion, grinding the mixture by a grinder, controlling the temperature to be not higher than 60 ℃, and filtering the mixture after grinding;
s13: after filtering, adding 30 parts of aqueous hydroxy acrylic acid dispersoid, 20 parts of aqueous hydroxy acrylic acid emulsion and 10 parts of low Tg self-crosslinking aqueous acrylic acid emulsion, stirring for 15 minutes, then adding 0.05 part of defoaming agent, 0.8 part of thickening agent and 8 parts of cosolvent, and continuing stirring for 15 minutes;
s14: filtering, removing filter residue, and finishing the preparation of the component A;
s2: preparation of the component B:
directly filtering and filling the component B;
s3: mixing the component A and the component B:
when in use, the component A and the component B are stirred and mixed.
Example 2
A water-based acrylic polyurethane coating for an assembled building steel structure is a two-component coating, and comprises a component A and a component B,
the component A comprises the following raw materials in parts by weight:
1 part of dispersing agent (byk190), 0.2 part of organosilicon defoaming agent, 0.3 part of polyurethane thickener (Haiming 299), 10 parts of rutile titanium dioxide, 10 parts of precipitated barium sulfate, 3 parts of pigment, 15 parts of aqueous hydroxy acrylic dispersion (Coxiba Bayhydrol A XP 2770), 35 parts of aqueous hydroxy acrylic emulsion (Pasteur Joncryl OH8312), 20 parts of low-Tg self-crosslinking aqueous acrylic emulsion and 8.5 parts of deionized water;
the component B comprises the following raw materials in parts by weight:
100 parts of curing agent polyisocyanate resin (Cosmagawa Bayhydur XP 2655);
the preparation method of the coating comprises the following steps:
s1: preparation of component A:
s11: adding 1 part of dispersing agent and 8.5 parts of deionized water into a container, stirring for 5 minutes, adding 10 parts of titanium dioxide, 3 parts of pigment and 10 parts of barium sulfate while stirring, adding 0.1 part of defoaming agent while stirring after stirring, and dispersing for 10 minutes;
s12: after dispersion, grinding the mixture by a grinder, controlling the temperature to be not higher than 60 ℃, and filtering the mixture after grinding;
s13: after filtering, adding 15 parts of aqueous hydroxy acrylic acid dispersoid, 35 parts of aqueous hydroxy acrylic acid emulsion and 20 parts of low Tg self-crosslinking aqueous acrylic acid emulsion, stirring for 15 minutes, then adding 0.1 part of defoaming agent and 0.3 part of thickening agent, and continuing stirring for 15 minutes;
s14: filtering, removing filter residue, and finishing the preparation of the component A;
s2: preparation of the component B:
directly filtering and filling the component B;
s3: mixing the component A and the component B:
when in use, the component A and the component B are stirred and mixed.
Comparative example 1
A water-based acrylic polyurethane coating for an assembled building steel structure is a two-component coating, and comprises a component A and a component B,
the component A comprises the following raw materials in parts by weight:
1 part of dispersing agent (byk190), 0.2 part of organosilicon antifoaming agent, 0.3 part of polyurethane thickener (Haiming 299), 10 parts of rutile titanium dioxide, 10 parts of precipitated barium sulfate, 3 parts of pigment, 70 parts of aqueous hydroxy acrylic dispersion (Costa Bayhydrol A XP 2770) and 8.5 parts of deionized water;
the component B comprises the following raw materials in parts by weight:
100 parts of curing agent polyisocyanate resin (Cosmagawa Bayhydur XP 2655);
the preparation method of the coating comprises the following steps:
s1: preparation of component A:
s11: adding 1 part of dispersing agent and 8.5 parts of deionized water into a container, stirring for 5 minutes, adding 10 parts of titanium dioxide, 3 parts of pigment and 10 parts of barium sulfate while stirring, adding 0.1 part of defoaming agent while stirring after stirring, and dispersing for 10 minutes;
s12: after dispersion, grinding the mixture by a grinder, controlling the temperature to be not higher than 60 ℃, and filtering the mixture after grinding;
s13: after filtering, adding 70 parts of aqueous hydroxy acrylic acid dispersoid and stirring for 15 minutes, then adding 0.1 part of defoaming agent and 0.3 part of thickening agent and continuing stirring for 15 minutes;
s14: filtering, removing filter residue, and finishing the preparation of the component A;
s2: preparation of the component B:
directly filtering and filling the component B;
s3: mixing the component A and the component B:
when in use, the component A and the component B are stirred and mixed.
Comparative example 2
A water-based acrylic polyurethane coating for an assembled building steel structure is a two-component coating, and comprises a component A and a component B,
the component A comprises the following raw materials in parts by weight:
1 part of dispersant (byk190), 0.2 part of organosilicon defoamer, 0.3 part of polyurethane thickener (Haimines 299), 10 parts of rutile titanium dioxide, 10 parts of precipitated barium sulfate, 3 parts of pigment, 70 parts of water-based hydroxy acrylic emulsion (Basf Joncryl OH8312) and 8.5 parts of deionized water;
the component B comprises the following raw materials in parts by weight:
100 parts of curing agent polyisocyanate resin (Cosmagawa Bayhydur XP 2655);
the preparation method of the coating comprises the following steps:
s1: preparation of component A:
s11: adding 1 part of dispersing agent and 8.5 parts of deionized water into a container, stirring for 5 minutes, adding 10 parts of titanium dioxide, 3 parts of pigment and 10 parts of barium sulfate while stirring, adding 0.1 part of defoaming agent while stirring after stirring, and dispersing for 10 minutes;
s12: after dispersion, grinding the mixture by a grinder, controlling the temperature to be not higher than 60 ℃, and filtering the mixture after grinding;
s13: adding 70 parts of water-based hydroxy acrylic emulsion after filtering and stirring for 15 minutes, then adding 0.1 part of defoaming agent and 0.3 part of thickening agent and continuing stirring for 15 minutes;
s14: filtering, removing filter residue, and finishing the preparation of the component A;
s2: preparation of the component B:
directly filtering and filling the component B;
s3: mixing the component A and the component B:
when in use, the component A and the component B are stirred and mixed.
Comparative example 3
A water-based acrylic polyurethane coating for an assembled building steel structure is a two-component coating, and comprises a component A and a component B,
the component A comprises the following raw materials in parts by weight:
1 part of dispersant (byk190), 0.2 part of organosilicon defoamer, 0.3 part of polyurethane thickener (Haimines 299), 10 parts of rutile titanium dioxide, 10 parts of precipitated barium sulfate, 3 parts of pigment, 50 parts of waterborne hydroxy acrylic emulsion (Basf Joncryl OH8312), 20 parts of low Tg self-crosslinking waterborne acrylic emulsion and 8.5 parts of deionized water;
the component B comprises the following raw materials in parts by weight:
100 parts of curing agent polyisocyanate resin (Cosmagawa Bayhydur XP 2655);
the preparation method of the coating comprises the following steps:
s1: preparation of component A:
s11: adding 1 part of dispersing agent and 8.5 parts of deionized water into a container, stirring for 5 minutes, adding 10 parts of titanium dioxide, 3 parts of pigment and 10 parts of barium sulfate while stirring, adding 0.1 part of defoaming agent while stirring after stirring, and dispersing for 10 minutes;
s12: after dispersion, grinding the mixture by a grinder, controlling the temperature to be not higher than 60 ℃, and filtering the mixture after grinding;
s13: adding 50 parts of water-based hydroxyl acrylic emulsion and 20 parts of low Tg self-crosslinking water-based acrylic emulsion after filtering, stirring for 15 minutes, adding 0.1 part of defoaming agent and 0.3 part of thickening agent, and continuing stirring for 15 minutes;
s14: filtering, removing filter residue, and finishing the preparation of the component A;
s2: preparation of the component B:
directly filtering and filling the component B;
s3: mixing the component A and the component B:
when in use, the component A and the component B are stirred and mixed.
Comparative example 4
A water-based acrylic polyurethane coating for an assembled building steel structure is a two-component coating, and comprises a component A and a component B,
the component A comprises the following raw materials in parts by weight:
1 part of dispersing agent (byk190), 0.2 part of organosilicon defoaming agent, 0.3 part of polyurethane thickener (Haiming 299), 10 parts of rutile titanium dioxide, 10 parts of precipitated barium sulfate, 3 parts of pigment, 50 parts of aqueous hydroxy acrylic dispersion (Costa Bayhydrol A XP 2770), 20 parts of low-Tg self-crosslinking aqueous acrylic emulsion and 8.5 parts of deionized water;
the component B comprises the following raw materials in parts by weight:
100 parts of curing agent polyisocyanate resin (Cosmagawa Bayhydur XP 2655);
the preparation method of the coating comprises the following steps:
s1: preparation of component A:
s11: adding 1 part of dispersing agent and 8.5 parts of deionized water into a container, stirring for 5 minutes, adding 10 parts of titanium dioxide, 3 parts of pigment and 10 parts of barium sulfate while stirring, adding 0.1 part of defoaming agent while stirring after stirring, and dispersing for 10 minutes;
s12: after dispersion, grinding the mixture by a grinder, controlling the temperature to be not higher than 60 ℃, and filtering the mixture after grinding;
s13: adding 50 parts of aqueous hydroxyl acrylic acid dispersoid and 20 parts of low Tg self-crosslinking aqueous acrylic acid emulsion after filtering, stirring for 15 minutes, adding 0.1 part of defoaming agent and 0.3 part of thickening agent, and continuing stirring for 15 minutes;
s14: filtering, removing filter residue, and finishing the preparation of the component A;
s2: preparation of the component B:
directly filtering and filling the component B;
s3: mixing the component A and the component B:
when in use, the component A and the component B are stirred and mixed.
Test example 1
The VOC content of the coatings of examples 1-2 and comparative examples 1-4 was measured according to the method specified in GB/T23986, and the measurement results are shown in Table 1 below.
Table 1 VOC content of the coatings
| Test items | Example 1 | Example 2 | Comparative example 1 | Comparative example 2 | Comparative example 3 | Comparative example 4 |
| VOC content | 15g/L | 10g/L | 150g/L | 50g/L | 80g/L | 100g/L |
Test example 2
The paint film properties of the coatings of examples 1-2 and comparative examples 1-4 were tested and the results are shown in Table 2 below.
TABLE 2 paint film Performance test results
Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Various equivalent modifications or substitutions can be made on the embodiments of the present invention by those skilled in the art without departing from the spirit and scope of the present invention, and these modifications or substitutions are within the scope of the present invention/any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The water-based acrylic polyurethane coating for the assembly type building steel structure is characterized by being a two-component coating comprising a component A and a component B,
the component A comprises the following raw materials in parts by weight:
1-3 parts of dispersing agent, 0.1-0.2 part of defoaming agent, 0.2-0.8 part of thickening agent, 0-10 parts of cosolvent, 10-15 parts of titanium dioxide, 10-15 parts of barium sulfate, 3-8 parts of pigment, 0-40 parts of waterborne hydroxy acrylic acid dispersoid, 0-40 parts of waterborne hydroxy acrylic acid emulsion, 0-20 parts of waterborne acrylic acid emulsion and 0-40 parts of deionized water;
the component B comprises the following raw materials in parts by weight:
100 parts of curing agent.
2. The waterborne acrylic polyurethane coating for prefabricated building steel structures as claimed in claim 1, wherein in the A component, the dispersant is byk 190.
3. The waterborne acrylic polyurethane coating for fabricated building steel structures as claimed in claim 1, wherein in the A component, the defoaming agent is a silicone-based defoaming agent.
4. The waterborne acrylic polyurethane coating for fabricated building steel structures as claimed in claim 1, wherein in the A component, the thickener is a polyurethane thickener.
5. The waterborne acrylic polyurethane coating for fabricated building steel structures as claimed in claim 1, wherein in the component A, the cosolvent is Dow dipropylene glycol methyl ether.
6. The waterborne acrylic polyurethane coating for the assembly type building steel structure of claim 1, wherein in the component A, titanium dioxide is rutile type titanium dioxide, barium sulfate is precipitated barium sulfate, and the pigment is an environment-friendly pigment without heavy metals.
7. The waterborne acrylic polyurethane coating for fabricated building steel structures of claim 1, wherein in the A component, the waterborne hydroxyl acrylic dispersion is Cosimva Bayhydrol A XP 2770, the waterborne hydroxyl acrylic emulsion is Bassfer Joncryl OH8312, and the waterborne acrylic emulsion is a low Tg self-crosslinking acrylic emulsion.
8. The waterborne acrylic polyurethane coating for fabricated building steel structures as claimed in claim 1, wherein in the B component, the curing agent is polyisocyanate resin.
9. The waterborne acrylic polyurethane coating for fabricated building steel structures as claimed in claim 1, which comprises an A component and a B component,
the component A comprises the following raw materials in parts by weight:
1 part of dispersing agent, 0.2 part of defoaming agent, 0.3 part of thickening agent, 10 parts of titanium dioxide, 10 parts of barium sulfate, 3 parts of pigment, 15 parts of aqueous hydroxy acrylic acid dispersoid, 35 parts of aqueous hydroxy acrylic acid emulsion, 20 parts of aqueous acrylic acid emulsion and 8.5 parts of deionized water;
the component B comprises the following raw materials in parts by weight:
100 parts of curing agent.
10. The preparation method of the water-based acrylic polyurethane coating for the fabricated building steel structure as claimed in claim 1, which comprises the following steps:
s1: preparation of component A:
s11: adding a dispersing agent and deionized water into a container, stirring for 5 minutes, adding titanium dioxide, pigment and barium sulfate while stirring, adding a defoaming agent while stirring, and dispersing for 10 minutes;
s12: after the dispersion is finished, grinding the mixture by a grinder, controlling the temperature to be not higher than 60 ℃, and filtering the mixture after the grinding is carried out until the fineness is qualified;
s13: adding the water-based hydroxy acrylic acid dispersoid, the water-based hydroxy acrylic acid emulsion and the water-based acrylic acid emulsion after filtering, stirring for 15 minutes, adding the defoaming agent, the thickening agent and the cosolvent, and continuing stirring for 15 minutes;
s14: filtering, removing filter residue, and finishing the preparation of the component A;
s2: preparation of the component B:
directly filtering and filling the component B;
s3: mixing the component A and the component B:
when in use, the component A and the component B are stirred and mixed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114702894A (en) * | 2022-04-12 | 2022-07-05 | 佩特化工(上海)有限公司 | Aqueous single-layer UV (ultraviolet) matte black coating |
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