CN110423500B - Dip-coating type cold-spraying zinc coating and preparation method thereof - Google Patents
Dip-coating type cold-spraying zinc coating and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a dip-coating type cold zinc spraying coating and a preparation method thereof. The coating is a single component, and the material types and the quantity ratios are respectively as follows: compared with the existing similar products, on the premise of reaching 96 percent of dry film zinc content, the cold zinc spray coating has extremely low dip coating viscosity and uniform thickness of a workpiece paint film, and is particularly suitable for dip coating of special-shaped parts and small workpieces. The corrosion resistance of dip-coating galvanization is equivalent to that of high-temperature galvanization above 500 ℃ and even electrogalvanizing, and the dip-coating galvanization can effectively reduce the discharge of a large amount of sewage in the high-temperature galvanization and can ensure the industrial high-efficiency flow line production. Therefore, the invention has great economic value and environmental protection value.
Description
Technical Field
The invention belongs to the field of anticorrosive coatings, and particularly relates to a method for preparing a dip-coating cold-spray zinc coating by taking two self-made thermoplastic rheological acrylic polymer resins as rheological additives.
Background
The dip coating is a coating mode which is convenient for continuous assembly line operation in factories, is suitable for coating workpieces with various shapes and sizes, and is particularly suitable for special-shaped workpieces, small workpieces and the like. The method has the greatest advantage of simple coating operation, convenience in operation and high construction efficiency. Meanwhile, dip coating has extremely high requirement on storage stability under dip coating viscosity, hard precipitation cannot occur in paint liquid, soft precipitation is easy to stir uniformly, and the thickness of a dip coating film is relatively uniform from top to bottom. Dip coating is more rigorous for cold zinc spraying with heavy ultrahigh zinc content. At present, various anti-settling measures are adopted in the market, and the effect is very little in the process of dip-coating and coating the cold zinc-spraying coating with 96 percent of zinc content.
The cold spray zinc coating is a single-component novel organic zinc-rich coating with the zinc content of 96 percent, the potential difference between the coating and the steel matrix is up to more than 1000mV, and the cold spray zinc coating can be used as a metal anti-corrosion protective layer in a single layer and can also be used as a bottom coating of a heavy anti-corrosion coating system. The cold zinc spraying coating integrates the advantages of electrogalvanizing, hot zinc spraying and zinc-rich coating, has the protection principle similar to electrogalvanizing and hot zinc spraying, has the dual functions of active cathodic protection and shielding protection, is a novel, long-acting, environment-friendly and convenient steel structure anticorrosion technology, particularly shows the outstanding advantages in the aspect of steel structure maintenance, thereby expanding the new field of application of zinc protection, being a product with the highest anticorrosion design age at present and being more than 20 years. The hot galvanizing corrosion-resistant service life can reach 20 years, but the high-temperature galvanizing at 500 ℃ is needed, the process is complex, the energy consumption is extremely high, a large amount of sewage is generated in the heating process, and the environmental pollution is serious. Therefore, the cold zinc spraying coating has a tendency of replacing the conventional epoxy zinc-rich coating and inorganic zinc-rich coating, is one of the development directions of the zinc-rich coating, and has wide application prospects in large steel structures such as power systems, bridges, building steel structures, towers, tunnel facilities, port facilities, water gates and auxiliary steel structures thereof, pipelines, signs, fences, heating facilities, roof steel structures of large places and the like.
Disclosure of Invention
Aiming at the defects that zinc powder is easy to precipitate and the thickness of a paint film is not uniform in dip coating construction of the existing cold spray zinc paint in the prior art, the invention provides a dip coating type cold spray zinc paint and a preparation method thereof.
The invention is realized by the following technical scheme.
A dip-coating type cold zinc spraying coating comprises the following raw materials in percentage by mass:
further, the thermoplastic rheological acrylic polymer resin A comprises the following raw materials in percentage by mass:
further, the thermoplastic rheological acrylic polymer resin B comprises the following raw materials in percentage by mass:
further, the rheological oligomer is prepared from the following raw materials in percentage by mass:
the invention further provides a preparation method of the dip-coating type cold zinc spraying coating, which comprises the following steps:
weighing and mixing 4-6 parts of thermoplastic rheological acrylic resin A and 4-6 parts of thermoplastic rheological acrylic resin B according to the mass ratio, adding 11-14 parts of solvent xylene, stirring until the resin liquid is in a jelly state, increasing the rotating speed, slowly adding 76-81 parts of high-purity superfine zinc powder in the state, then increasing the rotating speed, stirring, controlling the viscosity to be 110 +/-10 KU, filtering and packaging.
Further, adding dimethylbenzene into the mixture, and stirring for 1h at 600 r/min; increasing the rotating speed to 1000r/min, and stirring for 15 min.
Further, the thermoplastic rheological acrylic resin A is prepared according to the following method:
putting 30-35 parts of rheological oligomer, 4-6 parts of butyl acrylate, 8-10 parts of methyl methacrylate, 7-9 parts of styrene and 0.3-0.7 part of benzoyl peroxide in a mass ratio into a dropwise adding kettle, and uniformly stirring to obtain a mixed monomer; and then 40-50 parts of dimethylbenzene is put into a reaction kettle, heated and stirred, the temperature is raised to 80 +/-2 ℃, nitrogen is introduced into the reaction kettle at a constant temperature, the mixed monomer in the dropping kettle is uniformly dropped into the dimethylbenzene reaction kettle, the constant temperature is kept at 80 +/-2 ℃ after dropping, and after 6 hours, the prepared thermoplastic rheological acrylic resin A is cooled, filtered and packaged.
Further, the thermoplastic rheological acrylic resin B is prepared according to the following method:
putting 25-30 parts of rheological oligomer, 6-8 parts of butyl acrylate, 12-15 parts of methyl methacrylate, 5-7 parts of styrene and 0.3-0.7 part of benzoyl peroxide into a dropwise adding kettle, and uniformly stirring to obtain a mixed monomer; and then 40-50 parts of dimethylbenzene is put into a reaction kettle, heated and stirred, the temperature is raised to 80 +/-2 ℃, nitrogen is introduced into the reaction kettle at a constant temperature, the mixed monomer in the dropping kettle is uniformly dropped into the dimethylbenzene reaction kettle, the constant temperature is kept at 80 +/-2 ℃ after dropping, and after 6 hours, the prepared thermoplastic rheological acrylic resin B is cooled, filtered and packaged.
Further, the rheo-oligomer is prepared according to the following method:
placing 18-23 parts of dimethylamine and 13-16 parts of formaldehyde into a container, adding 50-60 parts of nonionic polyacrylamide into an aminomethylation reaction system after the reaction is completed for about 1 hour, slowly adding 9-11 parts of dimethyl sulfate for quaternization treatment when the reaction is carried out for 3-4 hours at 45-50 ℃, and cooling to room temperature after the reaction is carried out for 1 hour. The product is water solution, is evaporated and dried into solid powder, and then xylene is used for dissolving the powdery oligomer into solution with the mass fraction of 25 percent, namely the rheological oligomer.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
the dip-coating type cold-spraying zinc coating is prepared by self-preparing and synthesizing the thermoplastic rheological acrylic resin A and the thermoplastic rheological acrylic resin B, the cold-spraying zinc coating with the zinc content of more than 96 percent is suitable for dip-coating of the cold-spraying zinc coating, hard bottom precipitation can be avoided within 15 days when the viscosity is extremely low (about 20 seconds), and the thicknesses of upper and lower paint films of a workpiece are relatively uniform. The energy consumption is extremely low in the process of dip-coating galvanization, zero dust emission of sewage is realized, and meanwhile, the industrial high-efficiency flow line production can be ensured. Therefore, the invention has great economic value and environmental protection value.
Detailed Description
The present invention will be described in detail with reference to specific embodiments, which are illustrative of the invention and are not to be construed as limiting the invention.
The preparation method of the dip-coating cold zinc spraying coating comprises the following steps:
1) preparation of a rheological oligomer:
placing 18-23 parts of dimethylamine and 13-16 parts of formaldehyde into a three-neck flask, adding 50-60 parts of nonionic polyacrylamide into an aminomethylation reaction system after the reaction is completed for about 1 hour, slowly adding 9-11 parts of dimethyl sulfate for quaternization treatment when the reaction is carried out for 3-4 hours at 45-50 ℃, and cooling to room temperature after the reaction is carried out for 1 hour. The product is water solution, is evaporated and dried into solid powder, and then xylene is used for dissolving the powdery oligomer into solution with the mass fraction of 25 percent, namely the rheological oligomer.
2) Preparation of thermoplastic flow-modified acrylic resin a:
putting 30-35 parts of rheological oligomer, 4-6 parts of butyl acrylate, 8-10 parts of methyl methacrylate, 7-9 parts of styrene and 0.3-0.7 part of benzoyl peroxide in a mass ratio into a dropwise adding kettle, and uniformly stirring to obtain a mixed monomer; and then 40-50 parts of dimethylbenzene is put into a reaction kettle, heated and stirred, the temperature is raised to 80 +/-2 ℃, nitrogen is introduced into the reaction kettle at a constant temperature, the mixed monomer in the dropping kettle is uniformly dropped into the dimethylbenzene reaction kettle, the constant temperature is kept at 80 +/-2 ℃ after dropping, and after 6 hours, the prepared thermoplastic rheological acrylic resin A is cooled, filtered and packaged.
3) Preparing thermoplastic rheological acrylic resin B:
putting 25-30 parts of rheological oligomer, 6-8 parts of butyl acrylate, 12-15 parts of methyl methacrylate, 5-7 parts of styrene and 0.3-0.7 part of benzoyl peroxide into a dropwise adding kettle, and uniformly stirring to obtain a mixed monomer; and then 40-50 parts of dimethylbenzene is put into a reaction kettle, heated and stirred, the temperature is raised to 80 +/-2 ℃, nitrogen is introduced into the reaction kettle at a constant temperature, the mixed monomer in the dropping kettle is uniformly dropped into the dimethylbenzene reaction kettle, the constant temperature is kept at 80 +/-2 ℃ after dropping, and after 6 hours, the prepared thermoplastic rheological acrylic resin B is cooled, filtered and packaged.
4) Preparing a dip-coating type cold zinc spraying coating:
weighing and mixing 4-6 parts of thermoplastic rheological acrylic resin A and 4-6 parts of thermoplastic rheological acrylic resin B according to the mass ratio, adding 11-14 parts of solvent xylene, stirring until the resin liquid is in a jelly state, increasing the rotating speed, slowly adding 78-81 parts of high-purity superfine zinc powder in the state, then increasing the rotating speed, stirring, controlling the viscosity to be 110 +/-10 KU, filtering and packaging.
The invention is further illustrated by the following specific examples.
Example 1
Step 1, preparing a rheological oligomer, which comprises the following reaction processes:
Placing 18 parts of dimethylamine and 13 parts of formaldehyde into a three-neck flask, adding 60 parts of nonionic polyacrylamide into an aminomethylation reaction system after the reaction is completed for about 1 hour, slowly adding 9 parts of dimethyl sulfate for quaternization treatment when the reaction is carried out for 4 hours at 45 ℃, and cooling to room temperature after the reaction is carried out for 1 hour. The product is water solution, is evaporated and dried into solid powder, and then xylene is used for dissolving the powdery oligomer into solution with the mass fraction of 25 percent, namely the rheological oligomer. The reaction equation is as follows:
step 2, preparing the thermoplastic rheological acrylic polymer resin A, wherein the required raw materials and the quantity ratio are as follows:
process for polymerization
Adding the rheological oligomer, butyl acrylate, methyl methacrylate, styrene and benzoyl peroxide in the mass ratio into a dropwise adding kettle, and uniformly stirring to obtain a mixed monomer; then adding dimethylbenzene into a reaction kettle, heating and stirring, heating to 80 +/-2 ℃, introducing nitrogen into the reaction kettle at a constant temperature, uniformly dropwise adding the mixed monomer in the dropwise adding kettle into the dimethylbenzene reaction kettle, keeping the constant temperature of 80 +/-2 ℃ after dropwise adding, and cooling, filtering and packaging the prepared thermoplastic rheological acrylic resin A after 6 hours;
Step 3, preparing a thermoplastic rheological acrylic polymer resin B, wherein the required raw materials and the quantity ratio are as follows:
adding the rheological oligomer, butyl acrylate, methyl methacrylate, styrene and benzoyl peroxide in the ratio into a dropwise adding kettle, and uniformly stirring to obtain a mixed monomer; then adding dimethylbenzene into a reaction kettle, heating and stirring, heating to 80 +/-2 ℃, introducing nitrogen into the reaction kettle at a constant temperature, uniformly dropwise adding the mixed monomer in the dropwise adding kettle into the dimethylbenzene reaction kettle, keeping the constant temperature of 80 +/-2 ℃ after dropwise adding, and cooling, filtering and packaging the prepared thermoplastic rheological acrylic resin B after 6 hours;
step 4, preparing the dip-coating cold-spray zinc coating by using the thermoplastic rheological acrylic polymer resin A and the thermoplastic rheological acrylic polymer resin B respectively prepared in the step 2 and the step 3 as rheological additives:
the process comprises the following steps:
and (2) quantitatively weighing the self-made thermoplastic rheological acrylic resin A and the self-made thermoplastic rheological acrylic resin B according to the proportion, putting the self-made thermoplastic rheological acrylic resin A and the self-made thermoplastic rheological acrylic resin B into a stirring cylinder connected with a condensing unit, adding a solvent, stirring for 1h at 600r/min until the resin liquid is in a jelly state, increasing the rotating speed to 1000r/min, slowly adding high-purity superfine zinc powder in the state, increasing the rotating speed to 1500r/min after the high-purity superfine zinc powder is added, stirring for 15min, controlling the viscosity to be 110 +/-10 KU, filtering and packaging.
Example 2
Step 1, preparing a rheological oligomer, which comprises the following reaction processes:
placing 23 parts of dimethylamine and 16 parts of formaldehyde into a three-neck flask, adding 50 parts of nonionic polyacrylamide into an aminomethylation reaction system after the reaction is completed for about 1 hour, slowly adding 11 parts of dimethyl sulfate for quaternization treatment when the reaction is carried out for 3 hours at 50 ℃, and cooling to room temperature after the reaction is carried out for 1 hour. The product is water solution, is evaporated and dried into solid powder, and then xylene is used for dissolving the powdery oligomer into solution with the mass fraction of 25 percent, namely the rheological oligomer;
step 2, preparing the thermoplastic rheological acrylic polymer resin A, wherein the required raw materials and the quantity ratio are as follows:
preparing thermoplastic rheological acrylic resin A from the raw materials in the proportion by the polymerization process of the embodiment 1, cooling, filtering and packaging;
step 3, preparing a thermoplastic rheological acrylic polymer resin B, wherein the required raw materials and the quantity ratio are as follows:
preparing thermoplastic rheological acrylic resin B from the raw materials in the proportion by the polymerization process of the embodiment 1, cooling, filtering and packaging;
step 4, preparing the dip-coating cold-spray zinc coating by using the thermoplastic rheological acrylic polymer resin A and the thermoplastic rheological acrylic polymer resin B respectively prepared in the step 2 and the step 3 as rheological additives:
And (2) quantitatively weighing the self-made thermoplastic rheological acrylic resin A and the self-made thermoplastic rheological acrylic resin B according to the proportion, putting the self-made thermoplastic rheological acrylic resin A and the self-made thermoplastic rheological acrylic resin B into a stirring cylinder connected with a condensing unit, adding a solvent, stirring for 1h at 600r/min until the resin liquid is in a jelly state, increasing the rotating speed to 1000r/min, slowly adding high-purity superfine zinc powder in the state, increasing the rotating speed to 1500r/min after the high-purity superfine zinc powder is added, stirring for 15min, controlling the viscosity to be 110 +/-10 KU, filtering and packaging.
Example 3
Step 1, preparing a rheological oligomer, which comprises the following reaction processes:
placing 20 parts of dimethylamine and 13 parts of formaldehyde into a three-neck flask, adding 57 parts of nonionic polyacrylamide into an aminomethylation reaction system after the reaction is completed for about 1 hour, slowly adding 10 parts of dimethyl sulfate for quaternization treatment when the reaction is carried out for 4 hours at 50 ℃, and cooling to room temperature after the reaction is carried out for 1 hour. The product is water solution, is evaporated and dried into solid powder, and then xylene is used for dissolving the powdery oligomer into solution with the mass fraction of 25 percent, namely the rheological oligomer;
step 2, preparing the thermoplastic rheological acrylic polymer resin A, wherein the required raw materials and the quantity ratio are as follows:
Process for polymerization
Preparing thermoplastic rheological acrylic resin A from the raw materials in the proportion by the polymerization process of the embodiment 1, cooling, filtering and packaging;
step 3, preparing a thermoplastic rheological acrylic polymer resin B, wherein the required raw materials and the quantity ratio are as follows:
preparing thermoplastic rheological acrylic resin B from the raw materials in the proportion by the polymerization process of the embodiment 1, cooling, filtering and packaging;
step 4, preparing the dip-coating cold-spray zinc coating by using the thermoplastic rheological acrylic polymer resin A and the thermoplastic rheological acrylic polymer resin B respectively prepared in the step 2 and the step 3 as rheological additives:
and (2) quantitatively weighing the self-made thermoplastic rheological acrylic resin A and the self-made thermoplastic rheological acrylic resin B according to the proportion, putting the self-made thermoplastic rheological acrylic resin A and the self-made thermoplastic rheological acrylic resin B into a stirring cylinder connected with a condensing unit, adding a solvent, stirring for 1h at 600r/min until the resin liquid is in a jelly state, increasing the rotating speed to 1000r/min, slowly adding high-purity superfine zinc powder in the state, increasing the rotating speed to 1500r/min after the high-purity superfine zinc powder is added, stirring for 15min, controlling the viscosity to be 110 +/-10 KU, filtering and packaging.
Example 4
Step 1, preparing a rheological oligomer, which comprises the following reaction processes:
Placing 20 parts of dimethylamine and 15 parts of formaldehyde into a three-neck flask, adding 55 parts of nonionic polyacrylamide into an aminomethylation reaction system after the reaction is completed for about 1 hour, slowly adding 10 parts of dimethyl sulfate for quaternization treatment when the reaction is carried out for 3 hours at 45 ℃, and cooling to room temperature after the reaction is carried out for 1 hour. The product is water solution, is evaporated and dried into solid powder, and then xylene is used for dissolving the powdery oligomer into solution with the mass fraction of 25 percent, namely the rheological oligomer;
step 2, preparing the thermoplastic rheological acrylic polymer resin A, wherein the required raw materials and the quantity ratio are as follows:
preparing thermoplastic rheological acrylic resin A from the raw materials in the proportion by the polymerization process of the embodiment 1, cooling, filtering and packaging;
step 3, preparing a thermoplastic rheological acrylic polymer resin B, wherein the required raw materials and the quantity ratio are as follows:
preparing thermoplastic rheological acrylic resin B from the raw materials in the proportion by the polymerization process of the embodiment 1, cooling, filtering and packaging;
step 4, preparing the dip-coating cold-spray zinc coating by using the thermoplastic rheological acrylic polymer resin A and the thermoplastic rheological acrylic polymer resin B respectively prepared in the step 2 and the step 3 as rheological additives:
And (2) quantitatively weighing the self-made thermoplastic rheological acrylic resin A and the self-made thermoplastic rheological acrylic resin B according to the proportion, putting the self-made thermoplastic rheological acrylic resin A and the self-made thermoplastic rheological acrylic resin B into a stirring cylinder connected with a condensing unit, adding a solvent, stirring for 1h at 600r/min until the resin liquid is in a jelly state, increasing the rotating speed to 1000r/min, slowly adding high-purity superfine zinc powder in the state, increasing the rotating speed to 1500r/min after the high-purity superfine zinc powder is added, stirring for 15min, controlling the viscosity to be 110 +/-10 KU, filtering and packaging.
During the production process, attention needs to be paid to:
in the production processes of proportioning and the like, attention should be paid to sealing and preserving paint liquid, chemical reaction caused by water vapor contact is avoided as much as possible, and production operation is strictly forbidden in rainy and snowy days and environments with humidity of more than or equal to 60 percent.
Table 1 below shows the results of the performance test of the dip-coating type cold-spray zinc coating of the present invention
During the production process, attention needs to be paid to: the control of the metal content of the high-purity superfine zinc powder has the following technical requirements:
| item | Technical requirements | |
| 1 | Appearance of the product | Grey powder, no mechanical impurities |
| 2 | Total zinc content,%) | ≥99.8 |
| 3 | Metal zinc content,%) | ≥97.5 |
| 4 | Zinc powder particle size, mesh | ≥1200 |
The detection results of the dip-coated cold zinc spray coating products produced according to the embodiments 1 to 4 of the invention are as follows:
according to the detection results, the dip-coating type cold zinc-spraying coating prepared by the embodiment 4 of the invention can completely replace the traditional high-temperature galvanizing and electrogalvanizing processes, and the dip-coating galvanizing can greatly reduce the energy consumption, realize zero emission of sewage and zero dust emission, and simultaneously ensure the industrial high-efficiency flow line production. Therefore, the invention has great economic value and environmental protection value, and is more suitable for popularization and application.
Finally, it should be noted that the above-mentioned embodiments are only preferred embodiments of the present invention, and not intended to limit the present invention, and although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and equivalents can be made in the technical solutions described in the above-mentioned embodiments, or some technical features can be replaced. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The dip-coating cold-spray zinc coating is characterized by comprising the following raw materials in percentage by mass:
4-6 parts of thermoplastic rheological acrylic polymer resin A;
4-6 parts of thermoplastic flow-modified acrylic polymer resin B;
11-14 parts of dimethylbenzene;
76-81 parts of high-purity superfine zinc powder;
the thermoplastic rheological acrylic polymer resin A consists of the following raw materials in percentage by mass:
40-50 parts of dimethylbenzene;
30-35 parts of rheological oligomer;
4-6 parts of butyl acrylate;
8-10 parts of methyl methacrylate;
7-9 parts of styrene;
0.3-0.7 part of benzoyl peroxide;
the thermoplastic rheological acrylic polymer resin B consists of the following raw materials in percentage by mass:
40-50 parts of dimethylbenzene;
25-30 parts of rheological oligomer;
6-8 parts of butyl acrylate;
12-15 parts of methyl methacrylate;
5-7 parts of styrene;
0.3-0.7 part of benzoyl peroxide;
the rheological oligomer is prepared from the following raw materials in percentage by mass:
50-60 parts of nonionic polyacrylamide;
18-23 parts of dimethylamine;
13-16 parts of formaldehyde;
9-11 parts of dimethyl sulfate;
the rheopectic oligomer is prepared according to the following method:
placing 18-23 parts of dimethylamine and 13-16 parts of formaldehyde into a container, adding 50-60 parts of nonionic polyacrylamide into an aminomethylation reaction system after the reaction is completed for 1h, carrying out co-reaction at a certain temperature, slowly adding 9-11 parts of dimethyl sulfate for quaternization, and cooling to room temperature after the reaction is carried out for 1 h;
Adding nonionic polyacrylamide into an amine methylation reactant, and carrying out a co-reaction for 3-4 h at 45-50 ℃.
2. A method for preparing a dip-coated cold zinc spray coating according to claim 1, comprising the steps of:
weighing and mixing 4-6 parts of thermoplastic rheological acrylic resin A and 4-6 parts of thermoplastic rheological acrylic resin B according to the mass ratio, adding 11-14 parts of solvent xylene, stirring until the resin liquid is in a jelly state, increasing the rotating speed, slowly adding 76-81 parts of high-purity superfine zinc powder in the state, then increasing the rotating speed, stirring, controlling the viscosity to be 110 +/-10 KU, filtering and packaging.
3. The method for preparing a dip-coating type cold zinc spray coating according to claim 2, wherein the mixture is stirred for 1h at 600r/min after the xylene is added; increasing the rotating speed to 1000r/min, and stirring for 15 min.
4. The method for preparing a dip-coating type cold zinc spray coating according to claim 2, wherein the thermoplastic rheological acrylic resin A is prepared by the following method:
putting 30-35 parts of rheological oligomer, 4-6 parts of butyl acrylate, 8-10 parts of methyl methacrylate, 7-9 parts of styrene and 0.3-0.7 part of benzoyl peroxide in a mass ratio into a dropwise adding kettle, and uniformly stirring to obtain a mixed monomer; and then 40-50 parts of dimethylbenzene is put into a reaction kettle, heated and stirred, the temperature is raised to 80 +/-2 ℃, nitrogen is introduced into the reaction kettle at a constant temperature, the mixed monomer in the dropwise adding kettle is uniformly dropwise added into the dimethylbenzene reaction kettle, the constant temperature is kept at 80 +/-2 ℃ after dropwise adding is finished, and after 6 hours, the prepared thermoplastic rheological acrylic resin A is cooled, filtered and packaged.
5. The method for preparing dip-coating type cold zinc spray coating according to claim 2, wherein the thermoplastic rheological acrylic resin B is prepared according to the following method:
putting 25-30 parts of rheological oligomer, 6-8 parts of butyl acrylate, 12-15 parts of methyl methacrylate, 5-7 parts of styrene and 0.3-0.7 part of benzoyl peroxide into a dropwise adding kettle, and uniformly stirring to obtain a mixed monomer; and then 40-50 parts of dimethylbenzene is put into a reaction kettle, heated and stirred, the temperature is raised to 80 +/-2 ℃, nitrogen is introduced into the reaction kettle at constant temperature, the mixed monomer in the dropwise adding kettle is uniformly dropwise added into the dimethylbenzene reaction kettle, the constant temperature is kept at 80 +/-2 ℃ after dropwise adding is finished, and after 6 hours, the prepared thermoplastic rheological acrylic resin B is cooled, filtered and packaged.
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| CN103525236A (en) * | 2013-10-22 | 2014-01-22 | 江苏邦杰防腐保温科技有限公司 | Cold galvanizing coating preparation technology |
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| 浮选剂制备与性能评价;李颖等;《能源与环境》;20071231;第44-46页 * |
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