CN115011190A - 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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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
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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
- C09D7/40—Additives
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- C09D7/61—Additives non-macromolecular inorganic
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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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- 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 coatings, and particularly discloses a water-based low-temperature quick-drying acrylate coating, which comprises the following components in parts by weight: 20-30 parts of low-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 additive, 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 iron oxide red, 20-40 parts of nano 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-5 ℃ and is dried for 3h, the requirements of low-temperature construction process in winter are completely met, and the paint film has excellent hardness, water resistance and antirust property 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 global climate change and increasingly tense resource and energy sources, countries in the world have set up a series of strict environmental regulations and policies. Since the emission of Volatile Organic Compounds (VOC) of the conventional solvent-based coating causes serious environmental pollution, the aqueous coating begins to gradually replace the conventional solvent-based coating. The water paint is used as a product of the paint, the solvent of the water paint is water, the hidden danger of flammability and explosiveness is avoided, and the water paint has no pollution to the environment, so the water paint is bound to be the main direction of the development of the future paint.
At present, the existing water-based paint in the market generally has the defects of low drying speed, corrosion resistance and certain gap in antirust performance compared with a solvent-based paint. Particularly, when the environmental temperature is lower than 5 ℃, the crosslinking and curing of the coating are very difficult, the surface drying time of most coatings is about 12 hours generally, the actual drying time is about 18 hours, and even more than 24 hours, the surface drying time is difficult to reach 50% of the crosslinking degree of the drying paint film, and the paint film is easy to generate bubbles, so that the antirust performance of the paint film is poor. In winter in China, particularly in winter in northern China, the temperature is low, the temperature is generally-5 ℃, the disadvantage of low drying speed generally exists in general water-based acrylate coating, the next procedure can be carried out only after waiting for 4-5 days or even longer after construction, and a paint film after curing is easy to have air holes, so that the glossiness and the strength are reduced, and the requirements on construction progress, construction quality and coating effect are difficult to meet. Therefore, it is of great importance to develop a water-based acrylate coating which can be rapidly cured in a coating environment at a temperature lower than 5 ℃ and has excellent performances such as rust resistance and hardness.
Disclosure of Invention
Aiming at the technical problems that the water-based acrylate coating film in the prior art can not be rapidly cured in a coating environment at the temperature of lower than 5 ℃, and has the defects of poor antirust performance, low hardness and the like, the invention provides a water-based low-temperature quick-drying acrylate coating and a preparation method thereof.
In order to achieve the purpose of the invention, 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 low-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 additive, 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 iron oxide red, 20-40 parts of nano 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 aqueous 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 remarkably increased, and meanwhile, the dried paint film can be ensured to have higher hardness; the water-based alkyd resin, organic amine, cosolvent, film-forming additive, epoxy silane oligomer and low-molecular-weight alkali-soluble acrylic resin with specific contents are added for compounding, so that the low-temperature film-forming property of the coating is remarkably improved, the coating can be normally constructed at the temperature of-5 ℃, the surface of the coating is dried for 1 hour at the temperature of-5 ℃ and the coating is dried for 3 hours, meanwhile, the compatibility of each additive and the low-molecular-weight alkali-soluble acrylic resin is enhanced, the problems of air holes, low glossiness, strength reduction and the like of a paint film, which are easily caused by low-temperature quick drying, are avoided, the problem that the coating is difficult to construct at low temperature in winter is solved, the coating has good adhesive force with various substrates (such as cement, wood, metal and the like), and the coating has high popularization and application values.
Further, the low molecular weight alkali-soluble acrylic resin is prepared by polymerizing acrylic acid and propionate as monomers through a pipe.
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, lanchow chemical ltd.
The invention selects the small molecular weight alkali soluble resin formed by unique tubular polymerization as the film forming resin through creative thinking, can realize the rapid drying of the paint in low temperature environment, and can ensure that the dried paint film has higher hardness, but the solubility of the small molecular weight alkali soluble resin in a water-based system and the compatibility with other components are poorer, the invention obviously improves the solubility of the small molecular weight alkali soluble resin in the water-based system and the compatibility with other components by selecting the water-based alkyd resin with better compatibility to be compounded, and cooperatively adding the assistants such as organic amine, cosolvent, film forming resin, epoxy oligomer and the like, thereby ensuring that the prepared acrylate resin not only has excellent low temperature quick drying, but also has higher hardness, excellent water resistance, antirust performance and the like in the dried paint film, and can well meet the low temperature construction requirements, and the construction efficiency is improved.
Further, the water-based alkyd resin is Shanghai Nippon water-based resin YPWK-01W 75.
The optimized water-based alkyd resin has the effect of assisting the quick film forming of the alkali-soluble resin with small molecular weight, and also has the effects of wetting a substrate, promoting leveling and effectively improving the construction performance of the coating under low-temperature conditions.
Further, the organic amine is dimethylethanolamine.
The preferable organic amine can improve the solubility of the alkali-soluble resin with small molecular weight in an aqueous system, and can promote the compatibility of the alkali-soluble resin with small molecular weight and various additives by cooperating with a cosolvent, thereby improving the comprehensive performance of a paint film.
Further, the cosolvent is ethylene glycol butyl ether.
The preferable cosolvent can promote the quick dissolution of the alkali-soluble resin with small molecular weight in an aqueous system and enhance the compatibility of the film-forming resin and various auxiliaries; and the preferable cosolvent is matched with the film-forming assistant, so that the drying speed of the paint film can be improved, and the adhesive force between the paint film and the base material can be ensured as much as possible while the drying speed is improved.
Further, the film-forming aid is twelve alcohol esters.
Furthermore, the film forming additive and other components act together to ensure the overall performance of a paint film, so that the paint can achieve the best quick drying and adhesive force, and presents a balanced state.
Further, the wetting agent is TEGO-4100.
Further, the dispersant is TEGO-760W.
The preferable wetting agent and the dispersing agent cooperate with each other to enhance the compatibility among the components in the coating, so that the components in the coating are uniformly dispersed in the system, the coating is favorably and uniformly and firmly attached to various base materials, and the preferable wetting agent and the dispersing agent can also increase the dispersibility of pigments and fillers in the system, avoid the flocculation of the superfine nano-sized barium sulfate and the iron oxide red in the coating, and further enhance the glossiness and the strength of a paint film.
Further, the first defoaming agent is TEGO-810, and the second defoaming agent is TEGO-845.
The two preferred defoaming agents are compounded for use, so that a coating system can be subjected to lasting defoaming and foam inhibiting effects, no side effect is caused on the appearance and uniformity of a paint film, and the phenomenon that fish eyes, craters and the like influence the appearance of the paint film is avoided.
Further, the antifreeze is ethylene glycol.
Furthermore, the fineness of the nanometer superfine barium sulfate is 3000 meshes-6000 meshes.
The optimized superfine barium sulfate can enable a paint film to have higher compactness, thereby being beneficial to improving the water resistance and the antirust performance of the paint film.
Further, the flash rust inhibitor is Defors T-730.
Further, the epoxy silane oligomer is
SICO-OP200。
Epoxy silane oligomer is added into a coating system as a cross-linking agent to promote the cross-linking reaction of acrylic acid and alkyd resin active groups in a low-temperature environment, so that the drying speed of a paint film under a low-temperature condition is remarkably improved, the cross-linking density of the paint film is also remarkably improved, and the water resistance, hardness, rust prevention and other performances of the paint film are further 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 with the weighed cosolvent, heating to 50-60 ℃, adding the weighed alkali-soluble acrylic resin with small molecular weight and organic amine, and stirring for dissolving to obtain a first material;
s2, adding the weighed water-based alkyd resin, film forming auxiliary agent, wetting agent, dispersing agent, first defoaming agent, iron oxide red and nano superfine barium sulfate into the first material, mixing uniformly, adding a second part of purified water to adjust the viscosity to 90KU-100KU, and grinding to obtain a second material;
s3, adding the weighed antifreeze, anti-flash rust agent, second defoamer and epoxy silane oligomer into the second material under the stirring condition, uniformly mixing, adding the remaining 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 added slowly to prevent the materials from adhering to the container.
Further, in step S1, the first portion of purified water is 80 wt% to 90 wt% of the total amount of purified water.
Further, in step S2 and step S3, the amounts of the second part of purified water and the third part of purified water are adjusted to adjust the viscosity of the paint system to the required value. And the total amount of the first part of purified book, the second part of purified water and the third part of purified water is 22-35 parts.
Further, in step S2, grinding to fineness of 20 μm-25 μm to mix the components thoroughly to form a homogeneous system.
Compared with the prior art, the preparation method of the water-based low-temperature quick-drying acrylate coating provided by the invention is simple in process, convenient to operate, green and environment-friendly, the low-molecular-weight alkali-soluble acrylic resin is dissolved firstly, and then is mixed with other components according to a specific sequence, so that all the components in the coating are uniformly mixed, the compatibility is good, and the prepared acrylate coating has excellent low-temperature quick-drying property, water resistance, hardness and antirust property; and the auxiliary agent, the pigment and the filler in the coating formula are all prepared from environment-friendly and low-toxicity ingredients, are environment-friendly, are suitable for coating various substrates in winter, are particularly suitable for coating metal components such as steel structure equipment, metal plate houses and automobile chassis, have excellent coating application property and coating film dryness, and have high popularization and application values and wide market prospects.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit 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 weight:
20 parts of low-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 iron oxide red, 30 parts of nano 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, the LZ-680 of the Baoding market, bamboo chemical industry Co., Ltd; the water-based alkyd resin is Shanghai Ningpo water-based resin YPWK-01W 75; the organic amine is dimethyl ethanolamine of Istman; the cosolvent is ethylene glycol butyl ether; the film-forming additive is alcohol ester twelve of Istmann; the wetting agent is TEGO-4100; the dispersant is TEGO-760W; the first defoaming agent is TEGO-810, and the second defoaming agent is TEGO-845; the antifreezing agent is ethylene glycol; the fineness of the nanometer superfine barium sulfate is 3000 meshes-6000 meshes; the flash rust inhibitor is Defors 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 a designed ratio, adding 26 parts of weighed purified water and 26 parts of weighed cosolvent into a temperature-adjustable reaction kettle, uniformly mixing, heating to 55 ℃, adding the weighed alkali-soluble acrylic resin with small molecular weight into the reaction kettle slowly, adding the weighed organic amine slowly, and stirring to completely dissolve the alkali-soluble acrylic resin with small molecular weight to obtain a first material;
s2, adding the first material into a stirring cylinder, sequentially adding the weighed water-based alkyd resin, film forming aid, wetting agent, dispersing agent, first defoaming agent, iron oxide red and nano superfine barium sulfate under 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 microns to obtain a second material;
and S3, under the stirring condition of 1100r/min, sequentially adding the weighed antifreezing agent, flash rust inhibitor, second defoaming agent and epoxy silane oligomer into the second material, dispersing for 15min at a high speed, adding the remaining purified water to adjust the viscosity to be 75KU, filtering by 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 weight:
25 parts of low-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 assistant, 1.0 part of wetting agent, 0.5 part of dispersing agent, 0.5 part of first defoaming agent, 20 parts of iron oxide red, 40 parts of nanometer ultrafine barium sulfate, 1 part of antifreezing agent, 1.0 part of flash rust inhibitor, 0.1 part of second defoaming agent, 0.5 part of epoxy silane oligomer and 22 parts of purified water.
Wherein, the LZ-680 of the Baoding market, bamboo chemical industry Co., Ltd; the water-based alkyd resin is Shanghai Ningpo water-based resin YPWK-01W 75; the organic amine is dimethyl ethanolamine of Istman; the cosolvent is ethylene glycol butyl ether; the film-forming additive is alcohol ester twelve of Istmann; the wetting agent is TEGO-4100; the dispersant is TEGO-760W; the first defoaming agent is TEGO-810, and the second defoaming agent is TEGO-845; the antifreezing agent is ethylene glycol; the fineness of the nanometer superfine barium sulfate is 3000 meshes-6000 meshes; the preventionThe flash rust agent is Defors 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 a designed ratio, adding 18 parts of weighed purified water and the weighed cosolvent into a temperature-adjustable reaction kettle, uniformly mixing, heating to 50 ℃, adding the weighed alkali-soluble acrylic resin with small molecular weight into the reaction kettle slowly, adding the weighed organic amine slowly, and stirring to completely dissolve the alkali-soluble acrylic resin with small molecular weight to obtain a first material;
s2, adding the first material into a stirring cylinder, sequentially adding the weighed water-based alkyd resin, film-forming assistant, wetting agent, dispersing agent, first defoaming agent, iron oxide red and nano superfine barium sulfate under stirring, 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 μm to obtain a second material;
and S3, under the stirring condition of 1000r/min, sequentially adding the weighed antifreezing agent, anti-flash rust agent, second defoaming agent and epoxy silane oligomer into the second material, dispersing for 20min at a high speed, adding the remaining purified water to adjust the viscosity to 70KU, filtering through a 80-mesh sieve, and filling 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 weight:
30 parts of low-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 assistant, 0.5 part of wetting agent, 1.0 part of dispersant, 0.1 part of first defoaming agent, 15 parts of iron oxide red, 20 parts of nano 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, baoding is of the chemical Co., LtdLZ-680; the water-based alkyd resin is Shanghai Ningpo water-based resin YPWK-01W 75; the organic amine is dimethyl ethanolamine of Istman; the cosolvent is ethylene glycol butyl ether; the film-forming additive is alcohol ester twelve of Istman; the wetting agent is TEGO-4100; the dispersant is TEGO-760W; the first defoaming agent is TEGO-810, and the second defoaming agent is TEGO-845; the antifreezing agent is ethylene glycol; the fineness of the nanometer superfine barium sulfate is 3000 meshes-6000 meshes; the flash rust inhibitor is Defors 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 design ratio, adding 31 parts of the weighed purified water and the weighed cosolvent into a temperature-adjustable reaction kettle, uniformly mixing, heating to 60 ℃, then adding the weighed alkali-soluble acrylic resin with the small molecular weight into the reaction kettle slowly, then adding the weighed organic amine slowly, and stirring to completely dissolve the alkali-soluble acrylic resin with the small molecular weight to obtain a first material;
s2, adding the first material into a stirring cylinder, sequentially adding the weighed water-based alkyd resin, film-forming assistant, wetting agent, dispersing agent, first defoaming agent, iron oxide red and nano-superfine barium sulfate under 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 microns to obtain a second material;
and S3, under the stirring condition of 1200r/min, sequentially adding the weighed antifreezing agent, flash rust inhibitor, second defoaming agent and epoxy silane oligomer into the second material, dispersing at a high speed for 10min, adding the remaining purified water to adjust the viscosity to 80KU, filtering by an 80-mesh sieve, and filling to obtain the water-based low-temperature quick-drying acrylate coating.
In order to better illustrate the technical solution of the present invention, further comparison is made below by means of a comparative example and an example of the present invention.
Comparative example 1
The comparative example provides a water-based low-temperature quick-drying acrylate coating, the formula and the preparation method of which are completely the same as those in example 1, except that 1 part of organic amine is replaced by 1 part of organic amine, and no water-based alkyd resin is added.
Comparative example 2
This comparative example provides a waterborne, low temperature fast drying acrylate coating, the formulation and preparation method of which is exactly the same as example 1 except that no waterborne alkyd resin is added.
Comparative example 3
The formula and the preparation method of the water-based low-temperature quick-drying acrylate coating are completely the same as those in example 1, except that the compounding ratio of the low-molecular-weight alkali-soluble acrylic resin to the water-based alkyd resin is changed, the amount of the low-molecular-weight alkali-soluble acrylic resin is changed into 18 parts, and the amount of the water-based alkyd resin is changed into 4.5 parts.
Comparative example 4
This comparative example provides a waterborne, low temperature fast drying acrylate coating, the formulation and preparation method of which is exactly the same as example 1 except that the wetting agent TEGO-4100 is replaced with an equivalent amount of Shanghai Tager's substrate wetting agent Tech-2841 and the epoxy silane oligomer OP-200 is replaced with an equivalent amount of Luboemon 2063 metal adhesion promoter (the component is polyester based phosphoric acid).
Comparative example 5
The comparative example provides a water-based low-temperature quick-drying acrylate coating, the formula and the preparation method are completely the same as those of example 1, except that the water-based alkyd resin YPWK-01W75 is replaced by the same amount of the eurytochemical industry water-based acrylic modified alkyd resin GS-601.
To better illustrate the characteristics of the waterborne low temperature quick-drying acrylate coating provided by the embodiment of the present invention, the waterborne low temperature quick-drying acrylate coatings prepared in the embodiments 1 to 3 and the comparative examples 1 to 5 were tested for their corresponding performances, the test standards are shown in Table 1, and the specific results are shown in Table 2.
TABLE 1
TABLE 2
From the above data, it is clear that comparative example 1, in which no water-borne alkyd resin YPWK-01W75 was added and the amount of organic amine was insufficient, resulted in the problems of flash rust of the paint film, deterioration of water resistance, mirror frame on the board surface, crater, and the like; in comparative example 2, the waterborne alkyd resin YPWK-01W75 is not added, the organic amine is used in enough amount, and the phenomena of plate surface mirror frame spraying at low temperature and poor leveling still exist; in the comparative example 3, the compounding ratio of the alkali-soluble acrylic resin with the molecular weight and the water-based alkyd resin is changed, so that the surface drying and the actual drying are prolonged, the hardness of a paint film is reduced, and sagging is generated in low-temperature construction; in the comparative example 4, other types of wetting agents are selected, the epoxy silane oligomer is replaced by polyester-based phosphoric acid, slight shrinkage cavity is generated after the surface of a paint film is dried, the flatness of the paint film is poor, and the water resistance is obviously reduced; in comparative example 5, the waterborne alkyd resin YPWK-01W75 was replaced with the same amount of the general chemical GS601, and the paint film had no abnormal flatness, but had poor solid dryness and poor water resistance.
In conclusion, the water-based low-temperature quick-drying acrylate coating provided by the invention is solvent-free and nontoxic, can be normally constructed at a low temperature of-5 ℃, is high in drying speed of a coating film, is surface-dried for 1 hour at a temperature of-5 ℃ and is dried for 3 hours, can completely meet the requirements of a low-temperature construction process in winter, improves the construction efficiency in a low-temperature environment, and has excellent hardness, water resistance and antirust performance and higher practical value.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The water-based low-temperature quick-drying acrylate coating is characterized by comprising the following raw material components in parts by mass: 20-30 parts of low-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 additive, 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 iron oxide red, 20-40 parts of nano 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.
2. The aqueous low temperature fast drying acrylate coating of claim 1 wherein: the low molecular weight alkali soluble acrylic resin is prepared by polymerizing acrylic acid and propionate as monomers in a tubular manner.
3. The aqueous low temperature fast drying acrylate coating according to claim 1 or 2 wherein: the molecular weight of the alkali-soluble acrylic resin with small molecular weight is 2500, the distribution index is 1.25, the glass transition temperature is 85 ℃, the acid value is 220mgKOH/g, and the softening point is 130 ℃.
4. The aqueous low temperature fast drying acrylate coating of claim 3 wherein: the molecular weight of the alkali-soluble acrylic resin with small molecular weight is LZ-680 of Baoding Branhama chemical industry Co.
5. The aqueous low temperature fast drying acrylate coating of claim 1 wherein: the waterborne alkyd resin is Shanghai Nippon waterborne resin YPWK-01W 75.
6. The aqueous low temperature fast drying acrylate coating of claim 1 wherein the organic amine is dimethylethanolamine; and/or
The cosolvent is ethylene glycol butyl ether; and/or
The film-forming aid is alcohol ester twelve.
7. The aqueous low temperature fast drying acrylate coating of claim 1 wherein the wetting agent is TEGO-4100; and/or
The dispersant is TEGO-760W; and/or
The first defoaming agent is TEGO-810, and the second defoaming agent is TEGO-845.
8. The aqueous low temperature quick-drying acrylate coating of claim 1 wherein the anti-freeze agent is ethylene glycol; and/or
The fineness of the nanometer superfine barium sulfate is 3000 meshes-6000 meshes; and/or
The flash rust inhibitor is Defors T-730; and/or
The epoxy silane oligomer is
SICO-OP200。
9. A method for preparing an aqueous low-temperature quick-drying acrylate coating according to any one of claims 1 to 8, which comprises the following steps:
s1: weighing the components according to the designed proportion, uniformly mixing a first part of purified water with the weighed cosolvent, heating to 50-60 ℃, adding the weighed alkali-soluble acrylic resin with small molecular weight and organic amine, and stirring for dissolving to obtain a first material;
s2, adding the weighed water-based alkyd resin, film forming auxiliary agent, wetting agent, dispersing agent, first defoaming agent, iron oxide red and nano superfine barium sulfate into the first material, mixing uniformly, adding a second part of purified water to adjust the viscosity to 90KU-100KU, and grinding to obtain a second material;
and S3, adding the weighed antifreezing agent, anti-flash rust agent, second defoaming agent and epoxy silane oligomer into the second material under the stirring condition, uniformly mixing, adding the remaining purified water to adjust the viscosity to 70KU-80KU, and filtering to obtain the water-based low-temperature quick-drying acrylate coating.
10. The method for preparing an aqueous low-temperature quick-drying acrylate coating according to claim 9, wherein in step S2, the coating is ground to a fineness of 20 μm to 25 μm.
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| CN116004063A (en) * | 2023-01-09 | 2023-04-25 | 湖南金化科技集团有限公司 | Improved quick-drying aqueous steel pipe antirust varnish |
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