High-performance environment-friendly coating and preparation method thereof
High-performance environmentally friendly coatings were prepared by using water-based acrylic resin and highly active nano-titanium dioxide JR05, which solved the problems of VOC emissions and insufficient performance in coatings, and improved environmental protection and physicochemical properties, making them suitable for modern buildings and industrial equipment.
Patent Information
- Application Number
- CN202511584334.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-31
- Publication Date
- 2026-01-23
AI Technical Summary
Existing coatings release large amounts of volatile organic compounds (VOCs) during use, which harms indoor air quality and human health. They also have shortcomings in terms of durability, corrosion resistance, and adhesion, and cannot meet the needs of modern buildings and industrial equipment.
A high-performance environmentally friendly coating is prepared by using water-based acrylic resin as the main film-forming substance, combined with highly active nano-titanium dioxide JR05 and functional additives, through steps such as dispersion, mixing, grinding and filtration. This reduces VOC emissions, improves durability, corrosion resistance and adhesion, and adds defoamers and leveling agents to optimize drying speed and hardness.
It achieves low VOC emissions, good durability, corrosion resistance and adhesion, and has antiviral and antibacterial properties, meeting the needs of different application scenarios. It is easy to operate and low in cost, making it suitable for large-scale industrial production.
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Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of environmental protection coatings, and specifically relates to a high-performance environmental protection coating and a preparation method thereof. BACKGROUND
[0002] With the improvement of people's living standards and the enhancement of environmental awareness, higher requirements are put forward for the performance and environmental protection of coatings. Traditional coatings release a large amount of volatile organic compounds (VOCs) during use, which causes harm to indoor air quality and human health. In addition, some coatings have deficiencies in durability, corrosion resistance, adhesion, etc., and cannot meet the growing demand in modern construction, industrial equipment and other fields.
[0003] At present, although some environmentally friendly coatings have appeared on the market, their comprehensive performance still needs to be improved. For example, although some water-based coatings reduce the emission of VOCs, they still have gaps in drying speed, hardness, water resistance, etc. compared with solvent-based coatings; and some coatings with good performance have complex preparation processes and high costs, which limits their large-scale application. Therefore, it is of great practical significance to develop a coating that not only has good environmental performance, but also has excellent physical and chemical properties, and has a simple preparation process and reasonable cost. SUMMARY
[0004] The purpose of the present application is to provide a high-performance environmental protection coating and a preparation method thereof, which aims to solve the above problems.
[0005] The present application is mainly realized by the following technical solutions: A high-performance environmental protection coating, according to mass fraction, comprises: 30-50 parts of water-based acrylic resin, 5-15 parts of high-activity nano-titanium dioxide JR05, 3-8 parts of functional additives, 2-6 parts of film-forming additives, 0.5-2 parts of defoaming agent, 0.5-2 parts of leveling agent and 20-40 parts of deionized water.
[0006] In order to better realize the present application, further, the particle size of the high-activity nano-titanium dioxide JR05 is less than 5 nanometers.
[0007] In order to better realize the present application, further, according to mass fraction, it comprises 35 parts of water-based acrylic resin, 8 parts of high-activity nano-titanium dioxide JR05, 5 parts of functional additives, 3 parts of film-forming additives, 1 part of defoaming agent, 1 part of leveling agent and 32 parts of deionized water.
[0008] In order to better realize the present application, further, according to mass fraction, it comprises 40 parts of water-based acrylic resin, 10 parts of high-activity nano-titanium dioxide JR05, 6 parts of functional additives, 4 parts of film-forming additives, 1.5 parts of defoaming agent, 1.5 parts of leveling agent and 30 parts of deionized water.
[0009] A preparation method of high-performance environment-friendly paint, for preparing the high-performance environment-friendly paint, comprising the following steps: Step S1: pre-dispersing: adding high-activity nano-titanium dioxide JR05 into deionized water, and dispersing the same by using a high-speed dispersion machine at a rotating speed of 1000-1500 r / min for 15-30 minutes to obtain a high-activity nano-titanium dioxide JR05 dispersion liquid; Step S2: then, slowly adding water-based acrylic resin into the high-activity nano-titanium dioxide JR05 dispersion liquid in a stirring state, and continuing to stir for 15-20 minutes at a stirring speed of 600-800 r / min, so that the two are fully mixed; Step S3: finally, sequentially adding functional additives, film-forming additives, defoaming agents and leveling agents, and stirring for 5-10 minutes after adding each additive at a stirring speed of 400-600 r / min; Step S4: grinding the paint mixed in step S3 by a sand mill for 30-60 minutes, so that the particle size of the ground paint is 10-20 μm.
[0010] In order to better realize the present application, further, in step S4, the ground paint is filtered through a 100-200 mesh filter screen.
[0011] The present application has the following advantages: (1) The present application uses water-based acrylic resin as the main film-forming material, and water as the diluent, which greatly reduces the emission of VOCs, meets the environmental protection requirements, and reduces the harm to the environment and human health; by adding water-based acrylic resin, the present application meets the environmental protection requirements, and the water-based acrylic resin can be used as a dispersant / stabilizer, which significantly improves the agglomeration of high-activity nano-titanium dioxide JR05, and makes the high-activity nano-titanium dioxide JR05 stably dispersed in the resin water-based system. The paint of the present application has low VOCs emission, good durability, corrosion resistance, adhesion, excellent drying speed and hardness, the preparation method of the present application has the advantages of simplicity, high efficiency and low production cost, the preparation method of the present application is simple to operate, and can be completed by conventional dispersion, mixing, grinding and filtering steps, without the need for complex equipment and special process conditions, which is conducive to large-scale industrial production, reduces production cost, can better meet the market demand for high-performance environment-friendly paint, and has good practicability.
[0012] (2) The present application significantly improves the durability, corrosion resistance and hardness of the coating by adding high-activity nano-titanium dioxide (JR05). The high-activity nano-titanium dioxide (JR05) has good photocatalytic activity and ultraviolet shielding ability, can effectively decompose organic pollutants in the air, and prevent the coating from aging and degradation due to ultraviolet radiation; the reasonable use of functional additives further optimizes the adhesion, drying speed and other properties of the coating, so that it can meet the needs of different application scenarios. The coating prepared by the present application has antiviral and antibacterial properties, can efficiently kill viruses and inhibit bacterial production; at the same time, it has the functions of anti-formaldehyde, mildew resistance, alkali resistance, scrubbing resistance, high hiding power, etc., can purify air, prolong the service life of the coated object, and facilitate cleaning. DETAILED DESCRIPTION
[0013] Example 1 A high-performance environmentally friendly coating, by weight, comprises: water-based acrylic resin 30-50 parts, high-activity nano-titanium dioxide JR05 5-15 parts, functional additives 3-8 parts, film-forming additives 2-6 parts, defoaming agent 0.5-2 parts, leveling agent 0.5-2 parts, deionized water 20-40 parts. The preparation of the high-performance environmentally friendly coating comprises the following steps: (1) Pre-dispersion: The high-activity nano-titanium dioxide JR05 has a particle size of less than 5 nanometers and a hydrophilic surface, and has good dispersion performance. The high-activity nano-titanium dioxide JR05 is added to deionized water, and a high-speed dispersing machine is used to disperse at a speed of 1000-1500 r / min for 15-30 minutes to make it fully dispersed and uniform, obtaining a high-activity nano-titanium dioxide JR05 dispersion liquid.
[0014] (2) Mixing: Under stirring, the water-based acrylic resin is slowly added to the above-mentioned high-activity nano-titanium dioxide JR05 dispersion liquid, and stirring is continued for 15-20 minutes, with the stirring speed controlled at 600-800 r / min, so that the two are fully mixed; (3) Additives addition: The functional additives, film-forming additives, defoaming agent and leveling agent are added in turn, and after adding each kind of additive, stirring is carried out for 5-10 minutes, with the stirring speed maintained at 400-600 r / min, to ensure that the additives are uniformly dispersed in the coating system. The reaction principle is mainly physical mixing and functional synergy.
[0015] (4) Grinding: The mixed coating is ground through a sand mill, and the grinding time is 30-60 minutes, and the particle size after grinding is controlled between 10-20 μm, to improve the fineness and stability of the coating.
[0016] (5) Filtering and packaging: The ground coating is filtered through a 100-200 mesh filter screen to remove possible impurity particles, and then packaged, to obtain the high-performance environmentally friendly coating of the present application.
[0017] The present application selects water-based acrylic resin, and the specific differences between water-based acrylic resin and acrylic resin are as follows: 1) Different solvent systems: water-based acrylic resin is an important branch of acrylic resin, and the core difference between the two is solvent type and environmentally friendly type. Acrylic resin is solvent type, with organic solvents (such as toluene, xylene, butyl acetate, etc.) as dispersion / dissolution medium; water-based acrylic resin takes water as the main dispersion / dissolution medium, only contains a small amount of cosolvent (such as propylene glycol methyl ether, ethanol, usually <10%), and realizes stable dispersion of the resin in water through emulsifiers or self-emulsifying structures.
[0018] 2) Different environmental protection and safety: acrylic resin: a large amount of volatile organic compounds (VOCs) are released during construction and drying, polluting the environment and possibly harming human health; water-based acrylic resin: VOCs emission is extremely low (VOC <100 g / L), almost no irritating odor, higher safety, more in line with the trend of environmentally friendly coatings, and widely used in indoor, children's products, and food contact scenes.
[0019] 3) Different performance: acrylic resin, paint film drying speed is fast, hardness is high, solvent resistance and weather resistance are strong, but water resistance is weak; water-based acrylic resin, paint film has better water resistance and alkali resistance.
[0020] 4) Different construction and storage requirements: acrylic resin: pay attention to ventilation and explosion prevention during construction, tools need to be cleaned with organic solvents, and stored away from fire to prevent solvent evaporation and leakage; water-based acrylic resin: no special explosion-proof measures are required during construction, tools can be directly cleaned with water, and storage needs to be prevented from freezing.
[0021] The functional additives are used to improve the mechanical properties, environmental adaptability, and special functions of the paint film, such as moisture resistance and fire resistance, and to optimize the storage and construction stability of the coating. Specifically, the functional additives include dispersants and preservatives, the dispersants prevent pigment / filler aggregation through charge repulsion or steric hindrance, and the preservatives protect the coating by inhibiting microbial activity.
[0022] The film-forming additives are used to reduce the film-forming temperature, ensure normal temperature film-forming, improve the compactness and mechanical properties of the paint film, and improve the workability of the coating and the appearance of the paint film. Specifically, the film-forming additives are used to reduce the minimum film-forming temperature of resin particles, penetrate into the interior of the resin particles during drying of the coating, soften and fuse the particles, and finally form a continuous and dense protective film. This process does not produce chemicals, but only physical fusion of the particles.
[0023] The defoaming agent is to reduce the surface tension of the coating system, destroy the bubbles generated during the drying process (physical defoaming), no chemical reaction. The leveling agent is to improve the spreading of the coating on the substrate surface, reduce the brush marks, shrinkage, achieve physical leveling by adjusting the surface tension, and does not react with other components.
[0024] The high-activity nano-titanium dioxide JR05 is extremely easy to agglomerate due to its extremely small particle size and extremely high surface energy, and cannot be stably dispersed in the aqueous system for a long time. The primary role of the aqueous acrylic resin is to act as a dispersion medium / stabilizer, preventing the high-activity nano-titanium dioxide JR05 from agglomerating by physical wrapping. The aqueous acrylic resin molecular chain contains hydrophilic groups such as carboxyl (-COOH), hydroxyl (-OH), and ether (-O-) that can form hydrogen bonds with water molecules, allowing the resin to stably disperse in water and form a uniform aqueous emulsion. The high-activity nano-titanium dioxide JR05 surface is usually positively charged, and the hydrophilic groups on the resin molecular chain will be adsorbed on the surface of the high-activity nano-titanium dioxide JR05 particles through "charge repulsion" or "steric hindrance" effect, forming a resin wrapping layer that prevents particles from approaching each other, ultimately allowing the high-activity nano-titanium dioxide JR05 to be stably dispersed in the resin aqueous system.
[0025] Example 2: A high-performance environmentally friendly coating, according to the mass fraction, includes 35 parts of thermosetting aqueous acrylic resin, 8 parts of high-activity nano-titanium dioxide JR05 mixed with anatase and rutile, 5 parts of wetting functional additives, 3 parts of alkyd twelve fatty film-forming additives, 1 part of silicone defoaming agent, 1 part of polyether modified silicone leveling agent, and 32 parts of deionized water. The preparation of the high-performance environmentally friendly coating includes the following steps: First, the high-activity nano-titanium dioxide JR05 is added to the deionized water and dispersed at a speed of 1200 r / min for 20 minutes to obtain a high-activity nano-titanium dioxide JR05 dispersion; then, the functional additives, film-forming additives, defoaming agent, and leveling agent are slowly added to the dispersion and stirred at a speed of 700 r / min for 18 minutes; then, the functional additives, film-forming additives, defoaming agent, and leveling agent are added in sequence and stirred for 7 minutes after each addition; then, the mixture is ground by a sand mill for 45 minutes; finally, the mixture is filtered through a 150-mesh filter screen.
[0026] Example 3: A high-performance environmentally friendly coating, according to the mass fraction, includes 40 parts of aqueous acrylic resin, 10 parts of high-activity nano-titanium dioxide JR05, 6 parts of functional additives, 4 parts of film-forming additives, 1.5 parts of defoaming agent, 1.5 parts of leveling agent, and 30 parts of deionized water. The preparation method of the high-performance environmentally friendly coating is the same as that of Example 2, and therefore will not be repeated.
[0027] Comparative Example 1: The ordinary water-based paint commonly used in the market is used, and its composition and preparation method are conventional techniques.
[0028] The performance tests of the paints prepared in Examples 2 and 3 and the ordinary water-based paint of Comparative Example 1 are shown in Table 1. The high-performance environment-friendly paints prepared in Examples 2 and 3 have advantages over the ordinary water-based paint in terms of VOCs content, adhesion, hardness, water resistance and drying time.
[0029] Table 1 Test information The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification or equivalent change of the above embodiment according to the technical essence of the present application falls within the protection scope of the present application.
Claims
1. A high performance environmentally friendly coating characterized in that, According to the mass parts, including: 30-50 parts of water-based acrylic resin, 5-15 parts of high activity nano titanium dioxide JR05, 3-8 parts of functional additives, 2-6 parts of film forming additives, 0.5-2 parts of defoaming agent, 0.5-2 parts of leveling agent and 20-40 parts of deionized water.
2. The high performance environmentally friendly coating according to claim 1, characterized in that, The particle size of the high activity nano titanium dioxide JR05 is less than 5 nanometers.
3. The high-performance environmentally friendly coating according to claim 1 or 2, characterized in that, According to the mass parts, including 35 parts of water-based acrylic resin, 8 parts of high activity nano titanium dioxide JR05, 5 parts of functional additives, 3 parts of film forming additives, 1 part of defoaming agent, 1 part of leveling agent and 32 parts of deionized water.
4. The high-performance environmentally friendly coating of claim 1 or 2, wherein, According to the mass parts, including 40 parts of water-based acrylic resin, 10 parts of high activity nano titanium dioxide JR05, 6 parts of functional additives, 4 parts of film forming additives, 1.5 parts of defoaming agent, 1.5 parts of leveling agent and 30 parts of deionized water.
5. A process for the preparation of a high performance eco-friendly coating for the preparation of a high performance eco-friendly coating according to any one of claims 1 to 4, characterized in that, Including the following steps: Step S1: pre-dispersion: adding high activity nano titanium dioxide JR05 into deionized water, using a high-speed disperser to disperse at a speed of 1000-1500 r / min for 15-30 minutes, to obtain a high activity nano titanium dioxide JR05 dispersion liquid; Step S2: then, slowly adding water-based acrylic resin into the above high activity nano titanium dioxide JR05 dispersion liquid under stirring, continuing to stir for 15-20 minutes, the stirring speed is 600-800 r / min, so that the two are fully mixed; Step S3: finally, adding functional additives, film forming additives, defoaming agent and leveling agent in turn, and stirring for 5-10 minutes after adding each additive, the stirring speed is 400-600 r / min; Step S4: grinding the mixed paint in step S3 by a sand mill, the grinding time is 30-60 minutes, so that the particle size of the ground paint is 10-20 μm.
6. The method for preparing a high-performance environmentally friendly coating according to claim 5, characterized in that, In the step S4, the ground paint is filtered through a 100-200 mesh filter screen. In the step S4, the ground paint is filtered through a 100-200 mesh filter screen.