Water-based emulsion coating for pull ring

Abstract

The invention discloses a water-based emulsion coating for a pull ring. The water-based emulsion coating comprises the following raw materials by weight: 30-60 g of butyl acrylate, 20-80 g of methyl methacrylate, 3-8 g of acrylic acid, 0.3-1.5 g of ammonium persulfate, 0.5-2 g of lauryl sodium sulfate and 100-200 ml of water. According to the present invention, the coating material has advantages of good effect, smoothness, uniform color and no particle generation after the coating material molding, can be directly stirred and mixed at the specific temperature to obtain the coating material, has characteristics of low processing cost and suitableness for promotion and use, and can improve the water resistance of the product by adding the proper amounts of the dispersant, the wetting agent, the film forming auxiliary agent and the like, by adding auxiliaries such as the mildew preventive and the antibacterial agent, the product has mildew-proof and antibacterial functions.

Description

Technical Field

[0001] The invention belongs to the technical field of water-based emulsion coatings for pull ring processing, and in particular relates to a water-based emulsion coating for pull rings. Background Art

[0002] After many years of development, water-based emulsion coatings have made breakthroughs in health and environmental protection. However, compared with ordinary coatings, only the content of harmful substances such as organic flux, heavy metals and formaldehyde is controlled. However, when such products are used together with other decoration materials, they cannot effectively prevent toxic substances produced by other materials. In the current production process of cans, most of the coatings used for the outer wall and the pull ring that do not contact food are still solvent-based. Solvent-based coatings eliminate a large amount of organic harmful solvents during the coating process, causing great pollution to the environment. The pure water-based organic polymer emulsion of the present invention can be used to replace the existing solvent-based anti-corrosion coatings for metal surface corrosion protection. Summary of the invention

[0003] The object of the present invention is to provide a water-based emulsion coating for a pull ring to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a water-based emulsion coating for a pull ring, characterized in that the raw materials include, by weight: 10 to 60 grams of butyl acrylate, 20 to 80 grams of methyl methacrylate, 3 to 8 grams of acrylic acid, 0.3 to 1.5 grams of ammonium persulfate, 0.5 to 2 grams of sodium dodecyl sulfate, and 100 to 200 milliliters of water; The steps of preparing a water-based emulsion coating include: weighing butyl acrylate, methyl methacrylate, acrylic acid, ammonium persulfate and sodium dodecyl sulfate by weight, adding them into an emulsifier for stirring and emulsification, adding them into a reactor in batches for forced stirring and emulsion synthesis, synthesizing and keeping the synthetic liquid warm, adjusting the pH value range of the synthetic liquid with ammonia water after the heat preservation, adding an appropriate amount of a water-based phenolic resin curing agent for stirring and curing, and filtering to obtain the water-based emulsion coating.

[0005] Preferably, the butyl acrylate, methyl methacrylate, acrylic acid, ammonium persulfate and sodium dodecyl sulfate are added to an emulsifier for emulsification to obtain an aqueous emulsion, and the aqueous emulsion is added to the reactor in 10 batches.

[0006] Preferably, the temperature of the emulsion added by forced stirring in the reactor is 80-85 degrees, and the pH value of the aqueous emulsion added with ammonia water and kept warm for 30 minutes after the addition is completed is in the range of 7.5-8.

[0007] Preferably, the pH value of the aqueous emulsion is adjusted to 7.8 before adding the aqueous phenolic resin curing agent, and the amount of the aqueous phenolic resin curing agent is 20%.

[0008] Preferably, the sodium dodecyl sulfate is an anionic surfactant, and the anionic surfactant is one or more of a dispersant, a leveling agent, a defoamer, a thickener, a mildewproof agent, and an antibacterial agent.

[0009] Preferably, the dispersant is polycarboxylate sodium salt 5040, the leveling agent is acrylic resin, the defoamer is a polyether modified defoamer, the thickener is a polyurethane thickener, the mildewproof agent is an OIT aqueous emulsion mildewproof agent, and the antibacterial agent is an electrolytic silver ion solution.

[0010] Preferably, the butyl acrylate is an organic compound of the acrylate class, and ammonium persulfate is a strong oxidant of the inorganic compound class.

[0011] Compared with the prior art, the technical effects and advantages of the present invention are as follows: the pull ring water-based emulsion coating is prepared by mixing 10-60g of butyl acrylate, 20-80g of methyl methacrylate, 3-8g of acrylic acid, 0.3-1.5g of ammonium persulfate, 0.5-2g of sodium dodecyl sulfate and 100-200ml of water in the above proportions. The above-synthesized water-based coating is added with 20% of the total coating curing agent and stirred evenly, and then coated on a 0.22mm aluminum strip material. The curing temperature is 230 degrees Celsius and the time is 3 minutes. After being taken out and tested for performance, the bonding strength is good after being boiled in water at 12.7 degrees Celsius for 60 minutes. There is no feather film, and the appearance is golden yellow. The effect after the coating is formed is better, smoother, and the color is more uniform. It will not produce particles. Moreover, the coating can be obtained by directly stirring and mixing at a specific temperature. The processing cost is low and it is suitable for popularization and use. By adding appropriate amounts of dispersants, wetting agents, film-forming aids, etc., the water resistance of the product is improved. By adding additives such as mildew inhibitors and antibacterial agents, the product has mildew and antibacterial functions. DETAILED DESCRIPTION

[0012] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Example

[0013] The present invention provides a technical solution: a water-based emulsion coating for a pull ring, wherein the raw materials thereof include, by weight: 15 grams of butyl acrylate, 80 grams of methyl methacrylate, 5 grams of acrylic acid, 0.8 grams of ammonium persulfate, 1.2 grams of sodium dodecyl sulfate, and 120 milliliters of water; The steps of preparing a water-based emulsion coating include: weighing butyl acrylate, methyl methacrylate, acrylic acid, ammonium persulfate and sodium dodecyl sulfate by weight, adding them into an emulsifier, stirring and emulsifying, adding them into a reactor in 10 batches, forcibly stirring and synthesizing them with an emulsion method at 82 degrees, synthesizing and keeping the synthetic liquid warm for 30 minutes, adding ammonia water after keeping warm to adjust the pH of the water-based emulsion to 7.8, adding 20% ​​of a water-based phenolic resin curing agent, stirring and curing, and filtering to obtain a water-based emulsion coating. Example

[0014] A water-based emulsion coating for a pull ring, wherein the raw materials include, by weight: 20 grams of butyl acrylate, 75 grams of methyl methacrylate, 5 grams of acrylic acid, 1 gram of ammonium persulfate, 0.8 grams of sodium dodecyl sulfate, and 130 milliliters of water; The steps of preparing a water-based emulsion coating include: weighing butyl acrylate, methyl methacrylate, acrylic acid, ammonium persulfate, and sodium dodecyl sulfate by weight, adding them into an emulsifier, stirring and emulsifying, adding them into a reactor in 10 batches, forcibly stirring and synthesizing them at 82 degrees Celsius by an emulsion method, synthesizing and keeping the synthetic liquid warm for 30 minutes, adding ammonia water after keeping warm to adjust the pH of the water-based emulsion to 7.8, adding 20% ​​of a water-based phenolic resin curing agent, stirring and curing, and filtering to obtain a water-based emulsion coating. Example

[0015] A water-based emulsion coating for a pull ring, wherein the raw materials include, by weight: 25 grams of butyl acrylate, 70 grams of methyl methacrylate, 6 grams of acrylic acid, 0.7 grams of ammonium persulfate, 1 gram of sodium dodecyl sulfate, and 140 milliliters of water; The steps of preparing a water-based emulsion coating include: weighing butyl acrylate, methyl methacrylate, acrylic acid, ammonium persulfate, and sodium dodecyl sulfate by weight, adding them into an emulsifier, stirring and emulsifying, adding them into a reactor in 10 batches, forcibly stirring and synthesizing them at 82 degrees Celsius by an emulsion method, synthesizing and keeping the synthetic liquid warm for 30 minutes, adding ammonia water after keeping warm to adjust the pH of the water-based emulsion to 7.8, adding 20% ​​of a water-based phenolic resin curing agent, stirring and curing, and filtering to obtain a water-based emulsion coating.

[0016] In the present invention, 10 to 60 grams of butyl acrylate, 20 to 80 grams of methyl methacrylate, 3 to 8 grams of acrylic acid, 0.3 to 1.5 grams of ammonium persulfate, 0.5 to 2 grams of sodium dodecyl sulfate, and 100 to 200 milliliters of water are mixed in this proportion, and 20% of the total amount of the coating is added to the curing agent and stirred evenly, and then coated on a 0.22 mm aluminum strip material. The curing temperature is 230 degrees Celsius and the time is 3 minutes. After taking out, the performance is tested, and the bonding force is good after boiling in water at 12.7 degrees Celsius for 60 minutes. There is no feather film. The appearance is golden yellow, so that the effect of the coating after molding is better, smoother, and the color is more uniform, and no particles are generated.

[0017] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A water-based emulsion coating for a pull ring, characterized in that: The raw materials include, by weight: 30-60 grams of butyl acrylate, 20-80 grams of methyl methacrylate, 3-8 grams of acrylic acid, 0.3-1.5 grams of ammonium persulfate, 0.5-2 grams of sodium dodecyl sulfate, and the balance is water; The steps of preparing a water-based emulsion coating include: weighing butyl acrylate, methyl methacrylate, acrylic acid, ammonium persulfate and sodium dodecyl sulfate by weight, adding them into an emulsifier for stirring and emulsification, adding them into a reactor in batches for forced stirring and emulsion synthesis, synthesizing and keeping the synthetic liquid warm, adjusting the pH value range of the synthetic liquid with ammonia water after the heat preservation, adding an appropriate amount of a water-based phenolic resin curing agent for stirring and curing, and filtering to obtain the water-based emulsion coating.

2. The water-based emulsion coating for pull ring according to claim 1, characterized in that: The butyl acrylate, methyl methacrylate, acrylic acid, ammonium persulfate and sodium dodecyl sulfate are added to an emulsifier for emulsification to obtain an aqueous emulsion, and the aqueous emulsion is added to the reactor in 10 batches.

3. The water-based emulsion coating for pull ring according to claim 2, characterized in that: The temperature of the emulsion added by forced stirring in the reactor is 80-85 degrees. After the addition is completed, the temperature is kept for 30 minutes and the pH value of the aqueous emulsion added with ammonia water is in the range of 7.5-8.

4. The water-based emulsion coating for pull ring according to claim 3, characterized in that: The pH value of the aqueous emulsion is adjusted to 7.8, and then a water-based phenolic resin curing agent is added, and the amount of the water-based phenolic resin curing agent is 20%.

5. The water-based emulsion coating for pull ring according to claim 1, characterized in that: The sodium dodecyl sulfate is an anionic surfactant, and the anionic surfactant is one or more of a dispersant, a leveling agent, a defoamer, a thickener, a mildewproof agent, and an antibacterial agent.

6. The water-based emulsion coating for pull ring according to claim 5, characterized in that: The dispersant is polycarboxylate sodium salt 5040, the leveling agent is acrylic resin, the defoamer is a polyether modified defoamer, the thickener is a polyurethane thickener, the mildewproof agent is an OIT water-based emulsion mildewproof agent, and the antibacterial agent is an electrolytic silver ion solution.

7. The water-based emulsion coating for pull ring according to claim 1, characterized in that: The butyl acrylate is an organic compound of the acrylic acid ester class, and ammonium persulfate is a strong oxidant of the inorganic compound class.