CN115011190B - Water-based low-temperature quick-drying acrylate coating and preparation method thereof - Google Patents
Water-based low-temperature quick-drying acrylate coating and preparation method thereof Download PDFInfo
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- 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
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention relates to the technical field of coatings, and in particular discloses a water-based low-temperature quick-drying acrylate coating, which comprises the following components in percentage by weight: 20-30 parts of small molecular weight alkali-soluble acrylic resin, 2-3 parts of water-based alkyd resin, 2.0-2.5 parts of organic amine, 5-10 parts of cosolvent, 1-2 parts of film-forming auxiliary agent, 0.5-1.0 part of wetting agent, 0.5-1.0 part of dispersing agent, 0.1-0.5 part of first defoaming agent, 15-20 parts of ferric oxide red, 20-40 parts of nanometer superfine barium sulfate, 1-5 parts of antifreezing agent, 0.5-1.0 part of flash rust inhibitor, 0.1-0.5 part of second defoaming agent, 0.5-1.0 part of epoxy silane oligomer and 22-35 parts of purified water. The paint provided by the invention is surface-dried for 1h at minus 5 ℃ and is dried for 3h, so that the requirements of a low-temperature construction process in winter are completely met, and the paint film has excellent hardness, water resistance and rust resistance and higher practical value.
Description
Technical Field
The invention relates to the technical field of coatings, in particular to a water-based low-temperature quick-drying acrylate coating and a preparation method thereof.
Background
With the change of global climate and the growing tension of resource energy, a series of strict environmental protection regulations and policies are formulated in countries around the world. Since the emission of Volatile Organic Compounds (VOCs) of conventional solvent-based paints causes serious environmental pollution, aqueous paints have begun to gradually replace conventional solvent-based paints. The water paint is used as a product of paint, the solvent of the water paint is water, the hidden danger of inflammability and explosiveness is avoided, and the water paint has no pollution to the environment, so the water paint is a main direction of paint development in the future.
At present, the existing water-based paint in the market has the defects of low drying speed, corrosion resistance and rust resistance which are different from those of solvent-based paint to a certain extent. Particularly, when the ambient temperature is lower than 5 ℃, the crosslinking and curing of the coating are very difficult, the surface drying time of most of the coating is generally about 12 hours, the actual drying time is about 18 hours, and even more than 24 hours, the crosslinking degree of the dried coating is difficult to reach 50%, and bubbles are easy to generate in the coating, so that the antirust performance of the coating is poor. The temperature in winter in China, especially in winter in northern China is lower, the general temperature is between-5 ℃ and 5 ℃, the general aqueous acrylic ester paint has the defect of low drying speed, the next working procedure can be carried out after 4-5 days or even longer after construction, air holes are easily formed in a paint film after solidification, the glossiness and the strength are reduced, and the requirements for influencing the construction progress, the construction quality and the coating effect are hardly met. Therefore, the development of the water-based acrylate paint which can be rapidly cured in a coating environment with the temperature lower than 5 ℃ and has excellent performances such as rust resistance, hardness and the like has very important significance.
Disclosure of Invention
Aiming at the technical problems that the water-based acrylate coating film in the prior art cannot be rapidly solidified in a coating environment with the temperature lower than 5 ℃ and has the defects of poor rust resistance, low hardness and the like, the invention provides the water-based low-temperature quick-drying acrylate coating and a preparation method thereof.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
the water-based low-temperature quick-drying acrylate coating comprises the following raw material components in parts by weight: 20-30 parts of small molecular weight alkali-soluble acrylic resin, 2-3 parts of water-based alkyd resin, 2.0-2.5 parts of organic amine, 5-10 parts of cosolvent, 1-2 parts of film-forming auxiliary agent, 0.5-1.0 part of wetting agent, 0.5-1.0 part of dispersing agent, 0.1-0.5 part of first defoaming agent, 15-20 parts of ferric oxide red, 20-40 parts of nanometer superfine barium sulfate, 1-5 parts of antifreezing agent, 0.5-1.0 part of flash rust inhibitor, 0.1-0.5 part of second defoaming agent, 0.5-1.0 part of epoxy silane oligomer and 22-35 parts of purified water.
Compared with the prior art, the water-based low-temperature quick-drying acrylate coating provided by the invention has the advantages that the low-molecular-weight alkali-soluble acrylic resin is selected as the film-forming resin, so that the drying speed of the coating in a low-temperature environment is obviously improved, and meanwhile, the dried paint film can be ensured to have higher hardness; the water-based alkyd resin, the organic amine, the cosolvent, the film-forming auxiliary agent, the epoxy silane oligomer and the small molecular weight alkali-soluble acrylic resin are added for compounding, so that the low-temperature film-forming performance of the paint is remarkably improved, normal construction can be performed at the temperature of minus 5 ℃, the paint is dried for 1h at the temperature of minus 5 ℃ and is dried for 3h, meanwhile, the compatibility of the auxiliary agents and the small molecular weight alkali-soluble acrylic resin is enhanced, the problems of air holes, low glossiness, strength reduction and the like of a paint film easily caused by low-temperature quick drying are avoided, the problem of difficult low-temperature construction of the paint in winter is solved, the paint has good adhesive force with various base materials (such as cement, wood, metal and the like), and the paint has higher popularization and application values.
Further, the small molecular weight alkali-soluble acrylic resin is prepared by tubular polymerization of acrylic acid and propionate as monomers.
Further, the small molecular weight alkali-soluble acrylic resin has a molecular weight of 2500, a distribution index of 1.25, a glass transition temperature of 85 ℃, an acid value of 220mgKOH/g, and a softening point of 130 ℃.
Further, the molecular weight of the small molecular weight alkali-soluble acrylic resin is LZ-680 of Baoding Phyllostachys Pubescens chemical Co.
The invention adopts the unique tubular polymerization to prepare the small molecular weight alkali-soluble resin as the film-forming resin, can realize the quick drying of the coating in a low-temperature environment, and can ensure that a dried paint film has higher hardness, but the solubility of the small molecular weight alkali-soluble resin in an aqueous system and the compatibility with other components are poorer.
Further, the water-based alkyd resin is Shanghai yuan bang water-based resin YPWK-01W75.
The preferable water-based alkyd resin has the function of assisting the small molecular weight alkali-soluble resin in quick film formation, and also has the functions of wetting a base material, promoting leveling and effectively improving the workability of the coating under the low-temperature condition.
Further, the organic amine is dimethylethanolamine.
The preferable organic amine can improve the solubility of the small molecular weight alkali-soluble resin in an aqueous system, and can promote the compatibility of the small molecular weight alkali-soluble resin and various auxiliary agents by being cooperated with a cosolvent, so that the comprehensive performance of a paint film is improved.
Further, the cosolvent is ethylene glycol butyl ether.
The preferable cosolvent can promote the quick dissolution of the small molecular weight alkali-soluble resin in an aqueous system, and enhance the compatibility of the film-forming resin and various auxiliary agents; and the preferable cosolvent is matched with the film forming auxiliary agent, so that the drying speed of a paint film can be improved, and the adhesive force between the paint film and a substrate is ensured as much as possible while the drying speed is improved.
Further, the film forming aid is alcohol ester twelve.
Furthermore, the film forming auxiliary agent and other components jointly act to ensure the overall performance of a paint film, so that the paint can reach the best in terms of quick drying and adhesive force and is in an equilibrium state.
Further, the wetting agent is TEGO-4100.
Further, the dispersant is TEGO-760W.
The preferable wetting agent and the dispersing agent cooperate to enhance the compatibility among the components in the paint, so that the components in the paint are uniformly dispersed in the system, the paint is uniformly and firmly adhered to various substrates, the preferable wetting agent and the dispersing agent can also increase the dispersibility of pigment and filler in the system, and the flocculation of superfine nano superfine barium sulfate and iron oxide red in the paint is avoided, so that the glossiness and strength of a paint film are enhanced.
Further, the first defoamer is TEGO-810 and the second defoamer is TEGO-845.
The two preferred defoamers are compounded for use, so that a durable defoaming and foam inhibiting effect can be generated on a coating system, no side effect is caused on the appearance and uniformity of a paint film, and the phenomenon that fish eyes, craters and the like have influence on the appearance of the paint film is avoided.
Further, the antifreezing agent is ethylene glycol.
Further, the fineness of the nanometer superfine barium sulfate is 3000-6000 meshes.
The optimized superfine barium sulfate can enable the paint film to have higher compactness, thereby being beneficial to improving the water resistance and rust resistance of the paint film.
Further, the flash rust inhibitor is Defos T-730.
Further, the epoxy silane oligomer is
SICO-OP200。
Epoxy silane oligomer is added into a coating system to serve as a cross-linking agent, so that the cross-linking reaction of acrylic acid and alkyd resin active groups in a low-temperature environment is promoted, the drying speed of a paint film in the low-temperature environment is remarkably improved, the cross-linking density of the paint film is remarkably improved, and the performances of water resistance, hardness, rust resistance and the like of the paint film are remarkably improved.
The invention also provides a preparation method of the water-based low-temperature quick-drying acrylate coating, which comprises the following steps:
s1: weighing the components according to the designed proportion, uniformly mixing a first part of purified water and the weighed cosolvent, heating to 50-60 ℃, then adding the weighed small molecular weight alkali-soluble acrylic resin and organic amine, stirring and dissolving to obtain a first material;
s2, adding the weighed water-based alkyd resin, a film forming additive, a wetting agent, a dispersing agent, a first defoaming agent, iron oxide red and nanometer superfine barium sulfate into the first material, uniformly mixing, adding a second part of purified water to adjust the viscosity to 90KU-100KU, and grinding to obtain a second material;
and S3, under the stirring condition, adding the weighed antifreezing agent, the flash rust inhibitor, the second defoaming agent and the epoxy silane oligomer into the second material, uniformly mixing, adding the rest purified water to adjust the viscosity to 70KU-80KU, and filtering to obtain the water-based low-temperature quick-drying acrylate coating.
Further, in step S1, the small molecular weight alkali-soluble acrylic resin and the organic amine need to be slowly added to prevent the materials from adhering to the container.
Further, in step S1, the first portion of purified water is 80wt% to 90wt% of the total amount of purified water.
Further, in step S2 and step S3, the amounts of the second portion of purified water and the third portion of purified water are adjusted to the desired values in order to adjust the viscosity of the coating system. And the total amount of the first part of pure book, the second part of pure water and the third part of pure water is 22-35 parts.
Further, in step S2, the mixture is ground to a fineness of 20-25 μm to thoroughly mix the components to form a uniform system.
Compared with the prior art, the preparation method of the water-based low-temperature quick-drying acrylate paint provided by the invention has the advantages that the process is simple, the operation is convenient, the environment is protected, the low-molecular-weight alkali-soluble acrylic resin is firstly dissolved, and then the low-molecular-weight alkali-soluble acrylic resin is mixed with other components according to a specific sequence, so that all components in the paint are uniformly mixed, the compatibility is better, and the prepared acrylate paint has excellent low-temperature quick-drying property, water resistance, hardness and rust resistance; the auxiliary agent, pigment and filler and the like in the paint formula are all prepared from environment-friendly and low-toxicity ingredients, so that the paint is environment-friendly, is suitable for coating various base materials in winter, is particularly suitable for coating metal components such as steel structure equipment, metal plate houses and automobile chassis, has excellent paint workability and film drying property, has higher popularization and application value and has wide market prospect.
Detailed Description
The present invention will be described in further detail with reference to the following examples in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
The embodiment of the invention provides a water-based low-temperature quick-drying acrylate coating, which comprises the following raw material components in parts by mass:
20 parts of small-molecular-weight alkali-soluble acrylic resin, 2.5 parts of water-based alkyd resin, 2.0 parts of organic amine, 5 parts of cosolvent, 1.5 parts of film-forming additive, 0.6 part of wetting agent, 0.8 part of dispersing agent, 0.3 part of first defoaming agent, 18 parts of ferric oxide red, 30 parts of nanometer superfine barium sulfate, 2 parts of antifreezing agent, 0.7 part of flash rust inhibitor, 0.2 part of second defoaming agent, 0.3 part of epoxy silane oligomer and 30 parts of purified water.
Wherein, LZ-680 of Baoding Phyllostachys Pubescens chemical Co., ltd; the water-based alkyd resin is Shanghai Yuan bang water-based resin YPWK-01W75; the organic amine is dimethylethanolamine of Isman; the cosolvent is ethylene glycol butyl ether; the film forming additive is alcohol ester twelve of Isman; the wetting agent is TEGO-4100; the dispersant is TEGO-760W; the first defoamer is TEGO-810 and the second defoamer is TEGO-845; the antifreezing agent is glycol; the fineness of the nanometer superfine barium sulfate is 3000-6000 meshes; the flash rust inhibitor is Defos T-730; the epoxy silane oligomer is
SICO-OP200。
The preparation method of the water-based low-temperature quick-drying acrylate coating comprises the following steps:
s1: weighing the components according to the designed proportion, adding 26 parts of weighed purified water and a weighed cosolvent into a temperature-adjustable reaction kettle, uniformly mixing, heating to 55 ℃, then adding the weighed small molecular weight alkali-soluble acrylic resin into the reaction kettle slowly, then adding the weighed organic amine slowly, and stirring to completely dissolve the small molecular weight alkali-soluble acrylic resin to obtain a first material;
s2, adding the first material into a stirring tank, sequentially adding the weighed water-based alkyd resin, a film forming auxiliary agent, a wetting agent, a dispersing agent, a first defoaming agent, iron oxide red and nanometer superfine barium sulfate in a stirring state, dispersing at a high speed of 1100r/min for 15min, adding purified water to adjust the viscosity to 95KU, and grinding to the fineness of 20-25 mu m to obtain a second material;
and S3, under the stirring condition of 1100r/min, sequentially adding the weighed antifreezing agent, the flash rust inhibitor, the second defoaming agent and the epoxy silane oligomer into the second material, dispersing at a high speed for 15min, adding the rest purified water to adjust the viscosity to 75KU, filtering with 80 meshes, and filling to obtain the water-based low-temperature quick-drying acrylate coating.
Example 2
The embodiment of the invention provides a water-based low-temperature quick-drying acrylate coating, which comprises the following raw material components in parts by mass:
25 parts of small-molecular-weight alkali-soluble acrylic resin, 2 parts of water-based alkyd resin, 2.2 parts of organic amine, 8 parts of cosolvent, 2 parts of film-forming auxiliary agent, 1.0 part of wetting agent, 0.5 part of dispersing agent, 0.5 part of first defoaming agent, 20 parts of ferric oxide red, 40 parts of nanometer superfine barium sulfate, 1 part of antifreezing agent, 1.0 part of anti-flash rust agent, 0.1 part of second defoaming agent, 0.5 part of epoxy silane oligomer and 22 parts of purified water.
Wherein, LZ-680 of Baoding Phyllostachys Pubescens chemical Co., ltd; the water-based alkyd resin is Shanghai Yuan bang water-based resin YPWK-01W75; the organic amine is dimethylethanolamine of Isman; the cosolvent is ethylene glycol butyl ether; the film forming additive is alcohol ester twelve of Isman; the wetting agent is TEGO-4100; the dispersant is TEGO-760W; the first defoamer is TEGO-810 and the second defoamer is TEGO-845; the antifreezing agent is glycol; the fineness of the nanometer superfine barium sulfate is 3000-6000 meshes; the flash rust inhibitor is Defos T-730; the epoxy silane oligomer is
SICO-OP200。
The preparation method of the water-based low-temperature quick-drying acrylate coating comprises the following steps:
s1: weighing the components according to the designed proportion, adding 18 parts of purified water and a cosolvent into a temperature-adjustable reaction kettle, uniformly mixing, heating to 50 ℃, then adding the weighed small molecular weight alkali-soluble acrylic resin into the reaction kettle slowly, then adding the weighed organic amine slowly, and stirring to completely dissolve the small molecular weight alkali-soluble acrylic resin to obtain a first material;
s2, adding the first material into a stirring tank, sequentially adding the weighed water-based alkyd resin, a film forming auxiliary agent, a wetting agent, a dispersing agent, a first defoaming agent, iron oxide red and nanometer superfine barium sulfate in a stirring state, dispersing at a high speed of 1000r/min for 20min, adding purified water to adjust the viscosity to 90KU, and grinding to the fineness of 20-25 mu m to obtain a second material;
and S3, under the stirring condition of 1000r/min, sequentially adding the weighed antifreezing agent, the flash rust inhibitor, the second defoaming agent and the epoxy silane oligomer into the second material, dispersing at a high speed for 20min, adding the rest purified water to adjust the viscosity to 70KU, and filtering and filling with 80 meshes to obtain the water-based low-temperature quick-drying acrylate coating.
Example 3
The embodiment of the invention provides a water-based low-temperature quick-drying acrylate coating, which comprises the following raw material components in parts by mass:
30 parts of small-molecular-weight alkali-soluble acrylic resin, 3 parts of water-based alkyd resin, 2.5 parts of organic amine, 10 parts of cosolvent, 1 part of film-forming auxiliary agent, 0.5 part of wetting agent, 1.0 part of dispersing agent, 0.1 part of first defoaming agent, 15 parts of ferric oxide red, 20 parts of nanometer superfine barium sulfate, 5 parts of antifreezing agent, 0.5 part of anti-flash rust agent, 0.5 part of second defoaming agent, 1.0 part of epoxy silane oligomer and 35 parts of purified water.
Wherein, LZ-680 of Baoding Phyllostachys Pubescens chemical Co., ltd; the water-based alkyd resin is Shanghai Yuan bang water-based resin YPWK-01W75; the organic amine is dimethylethanolamine of Isman; the cosolvent is ethylene glycol butyl ether; the film forming additive is alcohol ester twelve of Isman; the wetting agent is TEGO-4100; the dispersant is TEGO-760W; the first defoamer is TEGO-810 and the second defoamer is TEGO-845; the antifreezing agent is glycol; the fineness of the nanometer superfine barium sulfate is 3000-6000 meshes; the flash rust inhibitor is Defos T-730; the epoxy silane oligomer is
SICO-OP200。
The preparation method of the water-based low-temperature quick-drying acrylate coating comprises the following steps:
s1: weighing all the components according to the designed proportion, adding 31 parts of weighed purified water and a weighed cosolvent into a temperature-adjustable reaction kettle, uniformly mixing, heating to 60 ℃, then adding the weighed small molecular weight alkali-soluble acrylic resin into the reaction kettle slowly, then adding the weighed organic amine slowly, and stirring to completely dissolve the small molecular weight alkali-soluble acrylic resin to obtain a first material;
s2, adding the first material into a stirring tank, sequentially adding the weighed water-based alkyd resin, a film forming auxiliary agent, a wetting agent, a dispersing agent, a first defoaming agent, iron oxide red and nanometer superfine barium sulfate in a stirring state, dispersing at a high speed of 1200r/min for 10min, adding purified water to adjust the viscosity to 100KU, and grinding to the fineness of 20-25 mu m to obtain a second material;
and S3, under the stirring condition of 1200r/min, sequentially adding the weighed antifreezing agent, the flash rust inhibitor, the second defoaming agent and the epoxy silane oligomer into the second material, dispersing at a high speed for 10min, adding the rest purified water to adjust the viscosity to 80KU, and filtering and filling with 80 meshes to obtain the water-based low-temperature quick-drying acrylate coating.
In order to better illustrate the technical solutions of the present invention, the following is further compared with examples of the present invention.
Comparative example 1
The comparative example provides an aqueous low temperature quick-drying acrylate coating, which has the same formulation and preparation method as in example 1, except that the addition amount of the organic amine is replaced by 1 part, and no aqueous alkyd resin is added.
Comparative example 2
The formulation and preparation method of the aqueous low-temperature quick-drying acrylate coating are exactly the same as those of the example 1, except that no aqueous alkyd resin is added.
Comparative example 3
The comparative example provides a water-based low-temperature quick-drying acrylate coating, the formula and the preparation method of the water-based low-temperature quick-drying acrylate coating are completely the same as those of the example 1, and the difference is that the compounding ratio of the molecular weight alkali-soluble acrylic resin and the water-based alkyd resin is changed, the dosage of the small molecular weight alkali-soluble acrylic resin is replaced by 18 parts, and the dosage of the water-based alkyd resin is replaced by 4.5 parts.
Comparative example 4
The formulation and preparation method of the aqueous low-temperature quick-drying acrylate coating are completely the same as those of the example 1, except that the wetting agent TEGO-4100 is replaced by an equivalent amount of Shanghai Tech-2841 as a substrate wetting agent, and the epoxy silane oligomer OP-200 is replaced by an equivalent amount of Lubo 2063 metal adhesion promoter (the component is polyester-based phosphoric acid).
Comparative example 5
The formula and the preparation method of the water-based low-temperature quick-drying acrylic ester coating are completely the same as those of the example 1, and the difference is that the water-based alkyd resin YPWK-01W75 is replaced by the equivalent water-based acrylic acid modified alkyd resin GS-601 in the broad-spectrum chemical industry.
In order to better illustrate the characteristics of the aqueous low-temperature quick-drying acrylate coating provided by the embodiment of the invention, the aqueous low-temperature quick-drying acrylate coatings prepared by the embodiments 1-3 and the comparative examples 1-5 are subjected to corresponding performance tests, the test standards are shown in table 1, and specific results are shown in table 2.
TABLE 1
TABLE 2
As is clear from the above data, the insufficient amount of the water-based alkyd resin YPWK-01W75 and the organic amine in comparative example 1 can cause problems of flash rust of a paint film, poor water resistance, mirror frame on a plate surface, shrinkage cavity and the like; in the comparative example 2, the water-based alkyd resin YPWK-01W75 is not added, the dosage of the organic amine is enough, and the phenomenon of mirror frame and flow leveling difference of the low-temperature spraying plate still exists; in comparative example 3, the compounding ratio of the alkali-soluble acrylic resin with molecular weight and the water-based alkyd resin is changed, the surface dryness and the real dryness are prolonged, the hardness of a paint film is also reduced, and sagging is generated in low-temperature construction; in comparative example 4, other types of wetting agents are selected, and epoxy silane oligomer is replaced by polyester-based phosphoric acid, so that slight shrinkage cavities can be generated after the paint film is dried, the flatness of the paint film is poor, and the water resistance is obviously reduced; in comparative example 5, the water-based alkyd resin YPWK-01W75 is replaced by the equivalent GS601 of the broad-tree chemical industry, so that the flatness of the paint film is not abnormal, but the drying property is poor, and the water resistance of the paint film is also poor.
In conclusion, the water-based low-temperature quick-drying acrylate coating provided by the invention has the advantages of no solvent, no toxicity, normal construction at the low temperature of-5 ℃, high drying speed of a coating film, surface drying at-5 ℃ for 1h and real drying for 3h, capability of completely meeting the requirements of a low-temperature construction process in winter, improvement of the construction efficiency of a low-temperature environment, excellent hardness, water resistance and rust resistance of the coating film, and higher practical value.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, or alternatives falling within the spirit and principles of the invention.
Claims (9)
1. The water-based low-temperature quick-drying acrylate coating is characterized by comprising the following raw material components in parts by weight: 20-30 parts of small molecular weight alkali-soluble acrylic resin, 2-3 parts of water-based alkyd resin, 2.0-2.5 parts of organic amine, 5-10 parts of cosolvent, 1-2 parts of film-forming auxiliary agent, 0.5-1.0 part of wetting agent, 0.5-1.0 part of dispersing agent, 0.1-0.5 part of first defoaming agent, 15-20 parts of ferric oxide red, 20-40 parts of nanometer superfine barium sulfate, 1-5 parts of antifreezing agent, 0.5-1.0 part of flash rust inhibitor, 0.1-0.5 part of second defoaming agent, 0.5-1.0 part of epoxy silane oligomer and 22-35 parts of purified water;
the small molecular weight alkali-soluble acrylic resin is prepared by tubular polymerization by taking acrylic acid and acrylic ester as monomers; the molecular weight of the small molecular weight alkali-soluble acrylic resin is 2500.
2. The aqueous low temperature quick drying acrylate coating according to claim 1 wherein: the distribution index of the small molecular weight alkali-soluble acrylic resin is 1.25, the glass transition temperature is 85 ℃, the acid value is 220mgKOH/g, and the softening point is 130 ℃.
3. The aqueous low temperature quick drying acrylate coating according to claim 2 wherein: the molecular weight of the small molecular weight alkali soluble acrylic resin is LZ-680 of Bobber Lophatherum gracile chemical industry Co.
4. The aqueous low temperature quick drying acrylate coating according to claim 1 wherein: the water-based alkyd resin is Shanghai Yuan bang water-based resin YPWK-01W75.
5. The aqueous low temperature quick drying acrylate coating according to claim 1 wherein said organic amine is dimethylethanolamine; and/or
The cosolvent is ethylene glycol butyl ether; and/or
The film forming auxiliary agent is alcohol ester twelve.
6. The aqueous low temperature quick drying acrylate coating according to claim 1 wherein said wetting agent is TEGO-4100; and/or
The dispersant is TEGO-760W; and/or
The first defoamer is TEGO-810 and the second defoamer is TEGO-845.
7. The aqueous low temperature quick drying acrylate coating according to claim 1, wherein the antifreeze is ethylene glycol; and/or
The fineness of the nanometer superfine barium sulfate is 3000-6000 meshes; and/or
The flash rust inhibitor is Defos T-730; and/or
The epoxy silane oligomer is SICO-OP200.
8. A method for preparing the aqueous low-temperature quick-drying acrylate coating according to any one of claims 1 to 7, which is characterized by comprising the following steps:
s1: weighing the components according to the designed proportion, uniformly mixing a first part of purified water and the weighed cosolvent, heating to 50-60 ℃, then adding the weighed small molecular weight alkali-soluble acrylic resin and organic amine, stirring and dissolving to obtain a first material;
s2, adding the weighed water-based alkyd resin, a film forming additive, a wetting agent, a dispersing agent, a first defoaming agent, iron oxide red and nanometer superfine barium sulfate into the first material, uniformly mixing, adding a second part of purified water to adjust the viscosity to 90KU-100KU, and grinding to obtain a second material;
and S3, under the stirring condition, adding the weighed antifreezing agent, the flash rust inhibitor, the second defoaming agent and the epoxy silane oligomer into the second material, uniformly mixing, adding the rest purified water to adjust the viscosity to 70KU-80KU, and filtering to obtain the water-based low-temperature quick-drying acrylate coating.
9. The method for preparing an aqueous low-temperature quick-drying acrylate coating according to claim 8, wherein in step S2, the coating is ground to a fineness of 20 μm to 25 μm.
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