Plastic electroplating-imitating mirror silver water paint and preparation process thereof

Abstract

The invention discloses a plastic electroplating-imitating mirror silver water paint and a preparation process, and belongs to the technical field of water paint preparation processes, the plastic electroplating-imitating mirror silver water paint comprises a transparent primer and silver paste, the transparent primer comprises the following components by weight: 30-45 of acrylic resin with solid content of 50% and Tg of 70-90 DEG C, 20-30 of a leveling agent with solid content of 20%, 5-10 of a pigment, 5-10 of a curing agent, 5-10 of a curing agent, and 5-10 of a curing agent. The paint comprises the following components in parts by weight: 8-12 parts of terpolymer vinyl chloride-vinyl acetate resin with the solid content of 30%, 1-2 parts of a breathable agent, 10-15 parts of a curing agent, 0.5-1.5 parts of benzoin, 2-4 parts of a brightener, 1-2 parts of an arrangement agent and 30-40 parts of deionized water. According to the plastic electroplating-imitating mirror silver water paint and the preparation process, the floating silver directional arrangement agent is added into the water paint, so that the wettability between floating silver and plastic is improved, the floating silver has high capacity to migrate to the surface of a coating, the electroplating floating silver is uniformly and compactly distributed on the surface of the coating, and the electroplating effect of the water paint is effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of water paint preparation technology, in particular to plastic electroplating mirror silver water paint and a preparation technology thereof. Background Art

[0002] Traditional imitation electroplating silver coatings mostly use solvent-based paints or electroplating technology. Although these methods can achieve a mirror silver effect to a certain extent, they have many disadvantages. First, solvent-based coatings have a high content of volatile organic compounds (VOCs), which poses certain environmental pollution problems and may cause harm to human health during construction. Secondly, traditional electroplating processes not only require expensive equipment investment, but may also cause problems such as insufficient coating adhesion, poor corrosion resistance, and short service life due to uneven coating or improper surface treatment. In addition, traditional coatings have poor fluidity and construction stability, and are prone to defects such as sagging, bubbling, and uneven coatings, which affect the appearance and use of the final coating.

[0003] In recent years, with the increasingly stringent environmental regulations and the increasing market demand for high-performance coatings, water-based coatings have gradually replaced traditional solvent-based coatings due to their low VOC emissions, environmental protection, non-toxicity, and easy construction. However, in the application of water-based coatings, due to the characteristics of water-based paints themselves, such as poor wettability of water-based systems and difficulty in achieving metallic luster effects, the application of water-based imitation electroplating silver paint on plastic surfaces still faces many challenges.

[0004] In order to solve these problems, researchers and engineers have proposed a variety of improvement measures. For example, by adjusting the resin formula, adding specific additives, improving the construction process and other means, the adhesion, glossiness and durability of water-based paints on plastic surfaces are improved. However, in the prior art, how to effectively control the distribution of silver paste in water-based paints, improve the uniformity of the coating and the mirror effect, is still a technical problem. Most of the existing water-based imitation electroplating silver paints have certain deficiencies in leveling, adhesion, weather resistance and environmental protection, and fail to fully meet the market demand for high-performance, long-life and environmentally friendly coatings. Therefore, the development of a plastic imitation electroplating mirror silver water paint with high gloss, good adhesion, uniform coating and low VOC emissions has become a technical problem that needs to be solved urgently in the coatings industry. Summary of the invention

[0005] The purpose of the present invention is to provide a plastic imitation electroplating mirror silver water paint and a preparation process. By adding a floating silver directional arrangement agent into the water paint, the wettability between the floating silver and the plastic is improved, so that the floating silver has a stronger ability to migrate to the coating surface, and the electroplated floating silver is evenly and densely distributed on the coating surface, effectively improving the electroplating effect of the water paint, and solving the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a plastic imitation electroplating mirror silver water paint, comprising a transparent primer and a silver paste, and its components and weight proportions are as follows: 6-8 silver pastes, the transparent primer comprising 30-45 acrylic resins with a solid content of 50% and a Tg of 70-90°C, 20-30 leveling agents with a solid content of 20%, 8-12 ternary copolymerized chlorovinyl resins with a solid content of 30%, 1-2 breathable agents, 10-15 curing agents, 0.5-1.5 benzoin, 2-4 brighteners, 1-2 arranging agents, 30-40 deionized water, 0.2-0.8 bactericides, 0.1-0.4 dispersants, 0.5-1.5 crosslinking agents, 30-40 polyurethane emulsions, 0.3-0.7 film-forming aids, 1-2 thickeners, and 1-5 protective agents.

[0007] Preferably, the alignment agent is silver powder directional alignment agent CATB-100.

[0008] Preferably, the bactericide is one or both of 2-methyl-4-isothiazoline-3-one and 5-chloro-2-methyl-4-isothiazoline-3-one; the dispersant is one or both of sodium dodecyl sulfate and sodium dodecylbenzene sulfonate; the cross-linking agent is one or both of aziridine and polycarbodiimide; the film-forming aid is alcohol ester dodecahydrate; and the thickener is one or both of a polyurethane thickener and an alkali swelling thickener.

[0009] Preferably, the stirring reaction is carried out at a temperature of 60-70°C for 2-4 hours; the heating reaction is carried out at a temperature of 70-80°C for 5-8 hours.

[0010] Preferably, the silver paste is nano-scale water-based aluminum-silver paste JNW312 with an aluminum powder content of 65% and a particle size of 8-15 μm.

[0011] Preferably, the leveling agent is an acrylate leveling agent.

[0012] Preferably, the acrylic resin with a solid content of 50% is dissolved in a mixed solution of butyl acetate, butanone and ethylene glycol monobutyl ether in a weight ratio of 25:10:15; the ternary copolymer chloroacetic acid resin with a solid content of 30% is a resin liquid dissolved in butanone.

[0013] The present invention provides another technical solution: a preparation process of plastic electroplating mirror silver water paint, comprising the following steps: Step 1, preparation of silver paste: add nano-scale water-based aluminum-silver paste into a preparation pot, add co-solvent, dispersant, deionized water, and glass powder at one time, and stir evenly to form aluminum-silver paste; Step 2, preparation of transparent primer: weigh the transparent primer raw materials according to the formula, mix deionized water, bactericide, dispersant, breathable agent and benzoin, add curing agent, acrylic resin, leveling agent and ternary copolymer chlorovinyl resin after stirring, keep stirring, and the fineness of the solid matter in the test solution is less than 50μm, which is qualified. After the fineness is qualified, add polyurethane emulsion, aligning agent, brightener, film-forming aid, crosslinking agent, thickener and protective agent, stir evenly to obtain the transparent primer, and set aside; Step 3, preparation of finished product: adding protective agent solution to silver paste for granulation, obtaining floating silver after the particles are produced, adding the floating silver to transparent primer, and mixing evenly to obtain the imitation electroplating mirror silver water paint; Step 4: When used on site, the ratio of floating silver to transparent primer is 10:1. Add 10-20% water according to the construction process for spraying. Dry naturally for 24 hours at room temperature or dry at 60-80°C for 30 minutes.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The plastic imitation electroplating mirror silver water paint and preparation process proposed in the present invention improve the wettability between the floating silver and the plastic by adding a floating silver directional arrangement agent into the water paint, so that the floating silver has a stronger ability to migrate to the coating surface, and the electroplated floating silver is evenly and densely distributed on the coating surface, effectively improving the electroplating effect of the water paint. In addition, the addition of the silver paste directional arrangement agent can also improve the overall leveling of the water paint, making the mirror effect better, significantly improving the reflection effect, glossiness and stability of the coating, avoiding the stratification phenomenon in traditional coatings, making the appearance of the coating more uniform and exquisite, with high commercial value and market prospects, and also has significant advantages in improving coating durability and production efficiency.

[0015] 2. The plastic imitation electroplating mirror silver water paint and preparation process proposed in the present invention adopts high-quality silver paste and transparent primer formula, and through a unique process, the coating has a good mirror effect and shows an elegant silver luster. The use of silver paste can not only enhance the metallic gloss of the paint film, but also improve the durability and corrosion resistance of the coating. The acrylic resin, ternary copolymer chlorovinyl resin and other ingredients in the present invention make the coating have strong adhesion on the plastic surface, effectively prevent peeling and falling off, and ensure stability and weather resistance in long-term use. It is particularly suitable for applications exposed outdoors or in extreme environments. The transparent primer and silver paste formula used in the present invention contain water-based components. The low organic solvent content makes the water paint have low volatile organic compounds (VOC), which meets modern environmental protection requirements, has almost no odor during construction, has little impact on human health, and reduces the emission of harmful gases.

[0016] 3. The plastic imitation electroplating mirror silver water paint and preparation process proposed in the present invention, the leveling agent, thickener and film-forming aid in the water paint formula can improve the fluidity and stability of the paint film, avoid sagging, bubbling and other undesirable phenomena during spraying, make the construction smoother, and the paint surface effect is uniform and smooth, which greatly improves the user's construction experience. By using appropriate bactericides and antibacterial ingredients, the water paint has certain antibacterial and anti-mildew functions, which can effectively prevent the coating from being invaded by microorganisms, thereby extending the service life of the coating and keeping the surface clean. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention are described clearly and completely below. 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 creative work are within the scope of protection of the present invention. Example

[0018] This embodiment provides the following technical solutions: Plastic imitation electroplating mirror silver water paint, including a transparent primer and silver paste, its components and weight ratio are as follows: silver paste 6, transparent primer including 50% solid content of acrylic resin 30 with Tg of 70~90℃, 20% solid content of leveling agent, 8% solid content of ternary copolymer chloroacetic acid resin, 1% breathable agent, 10% curing agent, 0.5% benzoin, 2% brightener, 1% aligning agent, 30% deionized water, 0.2% bactericide, 0.1% dispersant, 0.5% cross-linking agent, 30% polyurethane emulsion, 0.3% film-forming aid, 1 thickener, 1 protective agent.

[0019] The alignment agent used is silver powder directional alignment agent CATB-100.

[0020] The bactericide is 2-methyl-4-isothiazoline-3-one; the dispersant is sodium dodecyl sulfate; the crosslinking agent is aziridine; the film-forming aid is alcohol ester dodecahydrate; and the thickener is a polyurethane thickener.

[0021] The stirring reaction temperature was 60°C for 2 h; the heating reaction temperature was 70°C for 5 h.

[0022] The silver paste used was nano-scale water-based aluminum silver paste JNW312 with an aluminum powder content of 65% and a particle size of 8 μm.

[0023] The leveling agent is an acrylic leveling agent.

[0024] The acrylic resin with a solid content of 50% is prepared by dissolving a mixed solution of butyl acetate, butanone and ethylene glycol monobutyl ether in a weight ratio of 25:10:15; the ternary copolymer chloroacetic acid resin with a solid content of 30% is prepared by dissolving butanone into a resin liquid.

[0025] Furthermore, a single transparent coating enables light to project through the coating, thereby enhancing the reflectivity of light. After the silver paste solidifies, it floats on the surface of the solidified coating due to surface tension, forming a uniform and bright floating silver layer on the surface of the coating. Compared with traditional silver flash pigments, it has a better and denser reflective effect.

[0026] After repeated tests, it was found that the formula did not contain silver paste directional arrangement agent. Due to the greater density of floating silver than the true density of powder and the characteristics of floating silver paste, floating silver will migrate disorderly to the upper and lower surfaces of the coating when heated, and will not produce stratification effect. When the silver paste directional arrangement agent is added, the directional arrangement agent will play an orderly arrangement role on the aluminum powder in the powder, and make the silver paste migrate to the upper surface in an orderly manner, achieving a neat and orderly arrangement effect, resulting in stratification.

[0027] In order to better demonstrate the process of realizing the silver water paint of mirror-like electroplating on plastic, this embodiment proposes a preparation process of the silver water paint of mirror-like electroplating on plastic, including the following steps: Step 1, preparation of silver paste: add nano-scale water-based aluminum-silver paste into a preparation pot, add co-solvent, dispersant, deionized water, and glass powder at one time, and stir evenly to form aluminum-silver paste; Step 2, preparation of transparent primer: weigh the transparent primer raw materials according to the formula, mix deionized water, bactericide, dispersant, breathable agent and benzoin, add curing agent, acrylic resin, leveling agent and ternary copolymer chlorovinyl resin after stirring, keep stirring, and the fineness of the solid matter in the test solution is less than 50μm, which is qualified. After the fineness is qualified, add polyurethane emulsion, aligning agent, brightener, film-forming aid, crosslinking agent, thickener and protective agent, stir evenly to obtain transparent primer, and set aside; Step 3, preparation of finished product: adding protective agent solution to silver paste for granulation, obtaining floating silver after the granulation, adding floating silver to transparent primer, mixing evenly, obtaining imitation electroplating mirror silver water paint; Step 4: When used on site, the ratio of floating silver to transparent primer is 10:1. Add 10-20% water according to the construction process for spraying. Dry naturally for 24 hours at room temperature or dry at 60-80°C for 30 minutes. Example

[0028] Plastic imitation electroplating mirror silver water paint, including a transparent primer and silver paste, its components and weight ratio are as follows: silver paste 8, the transparent primer includes 50% of acrylic resin with a Tg of 70~90℃ 45, a solid content of 20% of a leveling agent 30, a solid content of 30% of a ternary copolymer chloroacetic acid resin 12, a breathable agent 2, a curing agent 15, benzoin 1.5, a brightener 4, an aligning agent 2, deionized water 40, a bactericide 0.8, a dispersant 0.4, a cross-linking agent 1.5, a polyurethane emulsion 40, a film-forming aid 0.7, a thickener 2, and a protective agent 5.

[0029] The alignment agent used is silver powder directional alignment agent CATB-100.

[0030] The bactericides are 2-methyl-4-isothiazoline-3-one and 5-chloro-2-methyl-4-isothiazoline-3-one; the dispersants are sodium dodecyl sulfate and sodium dodecylbenzene sulfonate; the crosslinking agents are aziridine and polycarbodiimide; the film-forming aid is alcohol ester dodecahydrate; and the thickeners are polyurethane thickener and alkali swelling thickener.

[0031] The stirring reaction temperature was 70°C for 4 h; the heating reaction temperature was 80°C for 8 h.

[0032] The silver paste used was nano-scale water-based aluminum silver paste JNW312 with an aluminum powder content of 65% and a particle size of 15 μm.

[0033] The leveling agent is an acrylic leveling agent.

[0034] The acrylic resin with a solid content of 50% is prepared by dissolving a mixed solution of butyl acetate, butanone and ethylene glycol monobutyl ether in a weight ratio of 25:10:15; the ternary copolymer chloroacetic acid resin with a solid content of 30% is prepared by dissolving butanone into a resin liquid. Example

[0035] Plastic imitation electroplating mirror silver water paint, including a transparent primer and silver paste, its components and weight ratio are as follows: silver paste 7, the transparent primer includes 50% of the solid content of acrylic resin Tg 70 ~ 90 ℃ 40, 20% of the solid content of the leveling agent 25, 30% of the solid content of the ternary copolymer chloroacetic acid resin 10, a breathable agent 1.5, a curing agent 13, benzoin 1, a brightener 3, an aligning agent 1.5, deionized water 35, a bactericide 0.4, a dispersant 0.2, a cross-linking agent 1, a polyurethane emulsion 35, a film-forming aid 0.5, a thickener 1.5, a protective agent 3.

[0036] The alignment agent used is silver powder directional alignment agent CATB-100.

[0037] The bactericide is 2-methyl-4-isothiazoline-3-one; the dispersants are sodium dodecyl sulfate and sodium dodecylbenzene sulfonate; the crosslinking agents are aziridine and polycarbodiimide; the film-forming aid is alcohol ester dodecahydrate; and the thickener is an alkali swelling thickener.

[0038] The stirring reaction temperature was 65°C and the time was 3h; the heating reaction temperature was 75°C and the time was 6.5h.

[0039] The silver paste used was nano-scale water-based aluminum silver paste JNW312 with an aluminum powder content of 65% and a particle size of 12 μm.

[0040] The leveling agent is an acrylic leveling agent.

[0041] The acrylic resin with a solid content of 50% is prepared by dissolving a mixed solution of butyl acetate, butanone and ethylene glycol monobutyl ether in a weight ratio of 25:10:15; the ternary copolymer chloroacetic acid resin with a solid content of 30% is prepared by dissolving butanone into a resin liquid.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Plastic imitation electroplating mirror silver water paint, including transparent primer and silver paste, characterized in that: Its components and weight proportions are as follows: 6-8 of silver paste, a transparent primer including 30-45 of acrylic resin with a solid content of 50% and a Tg of 70-90°C, 20-30 of a leveling agent with a solid content of 20%, 8-12 of a ternary copolymer chloroacetic acid resin with a solid content of 30%, 1-2 of a breathable agent, 10-15 of a curing agent, 0.5-1.5 of benzoin, 2-4 of a brightener, 1-2 of an aligning agent, 30-40 of deionized water, 0.2-0.8 of a bactericide, 0.1-0.4 of a dispersant, 0.5-1.5 of a cross-linking agent, 30-40 of a polyurethane emulsion, 0.3-0.7 of a film-forming aid, 1-2 of a thickener, and 1-5 of a protective agent.

2. The plastic imitation electroplating mirror silver water paint according to claim 1, characterized in that: The alignment agent is silver powder directional alignment agent CATB-100.

3. The plastic imitation electroplating mirror silver water paint according to claim 2, characterized in that: The bactericide is one or both of 2-methyl-4-isothiazoline-3-one and 5-chloro-2-methyl-4-isothiazoline-3-one; the dispersant is one or both of sodium dodecyl sulfate and sodium dodecylbenzene sulfonate; the cross-linking agent is one or both of aziridine and polycarbodiimide; the film-forming aid is alcohol ester dodecahydrate; and the thickener is one or both of a polyurethane thickener and an alkali swelling thickener.

4. The plastic imitation electroplating mirror silver water paint according to claim 3, characterized in that: The temperature of the stirring reaction is 60-70°C and the time is 2-4h; the temperature of the heating reaction is 70-80°C and the time is 5-8h.

5. The plastic imitation electroplating mirror silver water paint according to claim 4, characterized in that: The silver paste is a nano-scale water-based aluminum silver paste JNW312 with an aluminum powder content of 65% and a particle size of 8-15 μm.

6. The plastic imitation electroplating mirror silver water paint according to claim 5, characterized in that: The leveling agent is an acrylic leveling agent.

7. The plastic imitation electroplating mirror silver water paint according to claim 6, characterized in that: The acrylic resin with a solid content of 50% is prepared by dissolving a mixed solution of butyl acetate, butanone and ethylene glycol monobutyl ether in a weight ratio of 25:10:15; the ternary copolymer chloroacetic acid resin with a solid content of 30% is prepared by dissolving butanone into a resin liquid.

8. The preparation process of the plastic imitation electroplating mirror silver water paint according to claim 7, characterized in that: The steps include: Step 1, preparation of silver paste: add nano-scale water-based aluminum-silver paste into a preparation pot, add co-solvent, dispersant, deionized water, and glass powder at one time, and stir evenly to form aluminum-silver paste; Step 2, preparation of transparent primer: weigh the transparent primer raw materials according to the formula, mix deionized water, bactericide, dispersant, breathable agent and benzoin, add curing agent, acrylic resin, leveling agent and ternary copolymer chlorovinyl resin after stirring, keep stirring, and the fineness of the solid matter in the test solution is less than 50μm, which is qualified. After the fineness is qualified, add polyurethane emulsion, aligning agent, brightener, film-forming aid, crosslinking agent, thickener and protective agent, stir evenly to obtain the transparent primer, and set aside; Step 3, preparation of finished product: adding protective agent solution to silver paste for granulation, obtaining floating silver after the particles are produced, adding the floating silver to transparent primer, and mixing evenly to obtain the imitation electroplating mirror silver water paint; Step 4: When used on site, the ratio of floating silver to transparent primer is 10:

1. Add 10-20% water according to the construction process for spraying. Dry naturally for 24 hours at room temperature or dry at 60-80°C for 30 minutes.