High performance coating, manufacturing method, coating device and application in the field of furniture

Abstract

The present application relates to a kind of high-performance coatings, manufacturing method, coating device and application in the field of furniture, belong to high-performance coating field.The high-performance coatings include A component and B component;A component includes water-based fluorocarbon emulsion 30-50 parts, hydroxyl acrylic emulsion 10-20 parts, deionized water 15-25 parts, filler 10-20 parts, fluorine-silicon hybrid branched perfluoropolyether phosphate 2-5 parts, polyether modified heptamethyltrisiloxane 0.5-1.5 parts, water-based wax emulsion 1-3 parts, dodecanol ester 1-2 parts, titanium carbide Ti3C2T x 1-2 parts;B component is water-based isocyanate curing agent;The weight ratio of A component and B component is 100:15-25.The high-performance coatings have excellent anti-graffiti and anti-sticking performance, super waterproof performance under extreme environment, significantly improve the adhesion and durability of artificial board, coating is resistant to ultraviolet, salt fog, cold and hot cycle and water impact, significantly prolong the service life of outdoor furniture.

Description

Technical Field

[0001] This invention relates to the field of high-performance coatings technology, specifically a high-performance coating, manufacturing method, coating apparatus, and its application in the furniture industry. Background Technology

[0002] Outdoor furniture refers to a series of items used in open or semi-open outdoor spaces, as opposed to indoor furniture. Generally speaking, the most important requirements for outdoor furniture are that it is graffiti-proof and waterproof.

[0003] Considering the aesthetics of furniture, anti-graffiti and anti-stick properties (such as resistance to non-adhesive adhesives) are important indicators. In existing technologies, fluorocarbon anti-graffiti coatings generally have excellent water resistance and also possess excellent hydrophobicity (lotus effect). However, this is generally for solid wood panels, and the water resistance is usually "splash-proof" (often tested using immersion methods). However, for furniture on floating platforms / islands, seaside villas / beach leisure areas / yacht marinas (which not only experience heavy rain but also high salt spray and sea breeze corrosion), furniture around swimming pools, outdoor areas of hot springs / saunas / vacuum rooms, outdoor shower / changing area furniture, and marine / yacht interior furniture, some of which are constantly subjected to the long-term impact of waves (ocean waves), the water resistance of furniture coatings faces extreme requirements.

[0004] Furniture boards are generally divided into two types: solid wood boards and engineered wood boards. Engineered wood boards include particleboard, chipboard, and uncoated cardboard used in paperboard furniture.

[0005] The superior bonding strength between solid wood planks and coatings primarily stems from their natural, dense fibrous structure. While the surface of solid wood appears smooth, it is microscopically riddled with natural ducts and fiber gaps. When coatings are applied, they penetrate these tiny pores. Once cured, the coatings act like countless tiny anchors, deeply embedded within the wood fibers, creating a powerful mechanical bond.

[0006] The bonding strength of particleboard and chipboard is limited by their "reconstructed" particle structure, resulting in an inherent disadvantage. The surface of particleboard is made of wood chips and glue pressed together. The coating mainly adheres to this outermost "chip shell" rather than penetrating deep into the interior like solid wood. This "shell" itself has relatively low internal bonding strength.

[0007] Therefore, while commonly used fluorocarbon anti-graffiti coatings bond well with solid wood boards, their bonding effect with particleboard, chipboard, and other boards is limited, and their waterproof performance in extreme environments is also generally poor.

[0008] Based on this, the present invention is proposed. Summary of the Invention

[0009] This invention addresses the shortcomings of existing technologies by providing a high-performance coating, a manufacturing method, a coating apparatus, and its application in the furniture industry. The technical solution is as follows:

[0010] In the first aspect, a high-performance coating comprises component A and component B;

[0011] Component A comprises, by weight:

[0012] Aqueous fluorocarbon emulsion: 30-50 parts;

[0013] Hydroxyacrylic emulsion: 10-20 parts;

[0014] Deionized water: 15-25 parts;

[0015] Filler: 10-20 parts;

[0016] Fluoro-silicon hybrid branched perfluoropolyether phosphate: 2-5 parts;

[0017] Polyether-modified heptamethyltrisiloxane: 0.5-1.5 parts;

[0018] Water-based wax emulsion: 1-3 parts;

[0019] Dodecyl alcohol ester: 1-2 parts;

[0020] Titanium carbide (Ti3C2T) x 1-2 servings;

[0021] Component B is an aqueous isocyanate curing agent;

[0022] The weight ratio of component A to component B is 100:15-25.

[0023] As a further aspect of the present invention, the preparation method of the fluorine-silicon hybrid branched perfluoropolyether phosphate includes the following steps:

[0024] 1. Under nitrogen protection, terminal allyl perfluoropolyether and trifluoropropylmethylhydrodimethoxysilane are reacted at 75-85℃ in the presence of chloroplatinic acid catalyst to obtain a fluoro-silicon hybrid prepolymer with dimethoxysilane terminal group.

[0025] 2. Dissolve the fluoro-silicon hybrid prepolymer with dimethoxysilane end group in an organic solvent, add water, then add phosphorus pentoxide, heat to 40-50℃ and react, then hydrolyze, neutralize, extract and dry to obtain fluoro-silicon hybrid branched perfluoropolyether phosphate.

[0026] As a further aspect of the present invention, the organic solvent is preferably ethanol.

[0027] As a further aspect of the present invention, in component A, titanium dioxide (Ti3C2T) xThe filler is pre-dispersed with the filler through grinding and ultrasonication to form a filler@titanium carbon dispersion.

[0028] The specific method is as follows: Add a portion of deionized water, filler, and titanium dioxide (Ti3C2T) x Grinding and then ultrasonic-assisted dispersion are performed to obtain filler@titanium carbide dispersion.

[0029] Secondly, a method for manufacturing a high-performance coating includes the following steps:

[0030] 1. Take a portion of deionized water, filler, and titanium dioxide (Ti3C2T) from component A. x The filler @ titanium dioxide dispersion was obtained by sequential grinding and ultrasonic dispersion.

[0031] 2. The hydroxyl acrylic emulsion, dodecyl alcohol ester, polyether-modified heptamethyltrisiloxane and filler@titanium carbon dispersion are mixed, first stirred and pre-dispersed, and then dispersed at high speed to obtain the initial mixture;

[0032] 3. Add fluorine-silicon hybrid branched perfluoropolyether phosphate and water-based wax emulsion to the initial mixture, stir evenly, and obtain component A;

[0033] 4. Mix before application, according to the weight ratio of component A: component B = 100: 15-25, and let stand to mature to obtain the high-performance coating.

[0034] Thirdly, a coating apparatus for applying the aforementioned high-performance coating to wooden furniture panels:

[0035] When the wooden furniture board to be coated is a solid wood board, the coating device includes a sprayer, a roller coater, and a brush roller;

[0036] When the wooden furniture board to be coated is an artificial board, the coating device includes a sprayer, a roller coater, a brush roller, and a dry ice sandblasting machine; the dry ice sandblasting machine is used to perform interface treatment on the coating before the first coat of paint has fully cured.

[0037] As a further aspect of the present invention, the engineered wood panel includes particleboard, chipboard, and unpainted paperboard used in paperboard furniture.

[0038] Fourthly, the method for coating wood furniture boards with the aforementioned high-performance coating includes the following steps:

[0039] 1. Mix component A and component B at a weight ratio of 100:15 to obtain a light-curing coating; mix component A and component B at a weight ratio of 100:25 to obtain a heavy-curing coating.

[0040] 2. Apply the light-curing coating to the surface of the wooden furniture board and allow it to dry naturally for 1.5 ± 0.2 hours;

[0041] 3. When the light-curing coating is not fully cured, use a dry ice sandblasting machine for interface treatment. The dry ice sandblasting machine is used under the conditions of working air pressure of 4 bar, dry ice flow rate of 0.2-0.3 kg / min and spraying distance of 38-41 cm. After one spraying, allow it to warm up to room temperature for more than 3 hours.

[0042] 4. Then apply a heavy-duty coating, at least once, with an interval of more than 4 hours between each coat. After drying, you will get a wooden furniture board coated with a high-performance coating.

[0043] As a further embodiment of the present invention, the coating method in steps 2 and 4 is selected from spraying, roller coating or brush coating.

[0044] Fifthly, the high-performance coatings can be used in the furniture industry, especially for surface coating of outdoor furniture, including floating platform furniture, floating island furniture, seaside villa furniture, beach leisure area furniture, yacht marina furniture, poolside furniture, outdoor sauna room furniture, outdoor shower area furniture, marine furniture, or yacht interior furniture.

[0045] Compared with the prior art, the beneficial effects of the present invention are:

[0046] 1. Fluorine-silicon hybrid branched perfluoropolyether phosphate esters, in synergy with water-based wax emulsions, result in an extremely low surface energy coating. Oil-based graffiti can be easily wiped off, and self-adhesive stickers can be removed with a single tap, leaving no residue. Other perfluoropolyether derivatives cannot achieve the same anti-sticking effect.

[0047] 2. It has super waterproof performance in extreme environments and significantly improves the adhesion and durability of artificial boards. The unique light / heavy curing coating combined with dry ice sandblasting (uncuring window period) process allows the coating to penetrate into the sub-surface layer of particleboard up to 0.23mm to form an anchoring layer.

[0048] 3. Suppressing the Ti3C2T content of titanium carbon by pre-dispersing the filler with titanium carbon (grinding + ultrasonication). x Aggregation. When directly mixed or replaced with TiC, particulate matter appears on the coating surface, graffiti resistance is substandard, and the ultimate waterproofing is significantly reduced.

[0049] 4. The high-performance coating described in this invention is applicable to both solid wood boards and engineered wood products such as particleboard and chipboard, significantly expanding the range of materials used in outdoor furniture. The coating is resistant to UV rays, salt spray, thermal cycling, and water impact, significantly extending the service life of outdoor furniture. Attached Figure Description

[0050] Figure 1 This is a photograph of the sample plate 1 of Example 2 with graffiti marks printed on its surface;

[0051] Figure 2This is a photograph of the graffiti marks on the surface of sample plate 1 in Example 2 being wiped off;

[0052] Figure 3 This is a comparison image of sample plate 1 from Example 2 after half of the graffiti markings on its surface have been removed;

[0053] Figure 4 The photo shows a commercially available self-adhesive sticker that can be easily peeled off when applied to the surface of sample plate 1.

[0054] Figure 5 This is a cross-sectional view of sample plate 1. Detailed Implementation

[0055] The present invention will be described in detail below with reference to specific embodiments. These embodiments are merely some, not all, implementations of the present invention. All other implementations obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0056] Example 1

[0057] The raw materials for the high-performance coating include component A and component B, and in this example, 1 part is calculated as 20g;

[0058] The raw materials for component A include:

[0059] Aqueous fluorocarbon emulsion: 30-50 parts (preferably 40 parts); core film-forming substance;

[0060] Hydroxyacrylic emulsion: 10-20 parts (preferably 16 parts); auxiliary film-forming substances;

[0061] Deionized water: 15-25 parts (preferably 22 parts);

[0062] Filler: 10-20 parts (preferably 16 parts); filler includes titanium dioxide or other colored pigments;

[0063] Fluorine-silicone hybrid branched perfluoropolyether phosphate: 2-5 parts (preferably 4.5 parts); key functional additives;

[0064] Polyether-modified heptamethyltrisiloxane: 0.5-1.5 parts (preferably 1.2 parts; CAS No. 27306-78-1);

[0065] Aqueous wax emulsion: 1-3 parts (preferably 2 parts);

[0066] Dodecyl alcohol ester: 1-2 parts (preferably 1.3 parts); it is a film-forming aid;

[0067] Titanium carbide (Ti3C2T) x: 1-2 parts (preferably 1.6 parts, CAS No.: 12363-89-2); key functional filler;

[0068] Titanium carbide (Ti3C2T) x Also known as disilicide titanium carbon (MXene), it is a two-dimensional material that is highly prone to aggregation, with a specific surface area of ​​approximately 146 m². 2 The density of the layer is approximately 1-3 nm, which endows it with excellent adsorption and reactivity. The surface is rich in polar end groups, giving it good hydrophilicity and dispersibility.

[0069] Component B: Waterborne isocyanate curing agent, preferably HDI hydrophilic trimer, polyhexamethylene diisocyanate, CAS No. 28182-81-2.

[0070] Preparation method of fluorine-silicon hybrid branched perfluoropolyether phosphate:

[0071] 1. In a reaction vessel, add 10 mmol of terminal allyl perfluoropolyether (PFPE-allyl, molecular weight approximately 1500, allyl functionality ≈ 2; a type of perfluoropolyether compound containing active allyl terminal groups) and 12 mmol of trifluoropropylmethylhydrodimethoxysilane. Under nitrogen protection, stir, heat to 60°C, vacuum evacuate (vacuum degree -0.09 MPa), then purge with nitrogen, repeating this process three times to remove water and oxygen. Next, add chloroplatinic acid catalyst (Karstedt catalyst, platinum content 10-30 ppm), and under nitrogen protection, raise the temperature to 75-85°C and stir for 4-6 hours. After the reaction is complete, stop heating and allow to cool naturally to room temperature to obtain a fluoro-silicon hybrid prepolymer (viscous liquid) with dimethoxysilane terminal groups.

[0072] 2. Dissolve the fluoro-silicon hybrid prepolymer with dimethoxysilane end groups obtained in step 1 in 50 mL of anhydrous ethanol. Slowly add 2 mL of deionized water dropwise while stirring, and stir at room temperature for 1 h to hydrolyze the terminal methoxy groups to silanol groups. Transfer the reaction solution to an ice-water bath and cool to 0-5°C. Add 10.5 mmol of phosphorus pentoxide in portions. After the addition is complete, remove the ice bath and slowly raise the temperature to 40-50°C, stirring for 3-4 h. After the reaction is complete, slowly add 3-5 mL of deionized water dropwise, and continue stirring at 50°C for 1 h. Cool the reaction solution to room temperature, and add triethylamine (or ammonia) dropwise while stirring to adjust the pH to 6.5-7.5, obtaining a stable triethylamine phosphate salt. Finally, the reaction mixture was transferred to a separatory funnel, 200 mL of perfluorohexane was added, and the mixture was shaken and extracted for 15 minutes. After standing and separating the layers, the lower layer was an alcohol / aqueous phase containing the target product, and the upper layer was a perfluorohexane phase containing unreacted silane and byproducts (discarded). The lower layer was extracted and washed again with 50 mL of perfluorohexane. The lower layer was concentrated in a rotary evaporator to remove ethanol and water. The resulting concentrate was transferred to a vacuum drying oven and dried at 60°C for 12 hours to obtain a colorless to pale yellow transparent viscous liquid, which is the fluorine-silicon hybrid branched perfluoropolyether phosphate.

[0073] Coating preparation and application process:

[0074] Stepwise mixing: First, mix 1 / 3 of the water (approximately 7 parts) from component A, along with the filler and titanium dioxide (Ti3C2T). x Grind in a sand mill for 10-20 minutes, and after grinding, transfer to an ultrasonic disperser and ultrasonically disperse at an ultrasonic frequency of 20-22 kHz for 30-40 minutes to obtain filler@titanium carbide dispersion.

[0075] Next, the hydroxyl acrylic emulsion, dodecyl alcohol ester, polyether-modified heptamethyltrisiloxane, and filler@titanium carbon dispersion are pre-dispersed in a disperser at a stirring speed of 300~600 r / min for 5~6 min. Then, they are dispersed in a high-speed disperser at a linear velocity of 18~25 m / s (dispersion disc) for 20~40 min, and finally dispersed to a preliminary mixture with a fineness of less than or equal to 30µm.

[0076] Paint mixing: Add fluorine-silicon hybrid branched perfluoropolyether phosphate and water-based wax emulsion to the initial mixture, stir at low speed (300~600r / min) until uniform, to prevent damage to the emulsion structure, and obtain component A.

[0077] Mixing before application: Before applying the coating to the wooden furniture board, mix component A: component B in a ratio of 100:(15-25) (preferably 100:21) and stir well.

[0078] Curing and Coating: After mixing, let stand for 15 minutes to cure, obtaining paint 1. Then, apply the paint using a sprayer, roller coater, or brush. Generally, apply two coats, with an interval of at least 4 hours between each coat.

[0079] The above-mentioned coating 1 was applied to the surface of the oak board (raw wood) using a brush roller. After the coating dried, its performance indicators are as follows:

[0080] Anti-sticking performance: After the tape is applied for 48 hours, it can be removed without leaving any residue or damaging the paint film.

[0081] Scrub resistance: > 5000 cycles (without breaking the paint film).

[0082] Anti-graffiti: Oil-based pen writing can be easily wiped off with a cloth or alcohol.

[0083] When component A (hydroxyl-containing aqueous fluorocarbon emulsion and acrylic emulsion) is mixed with component B (aqueous isocyanate curing agent), as moisture evaporates, the distance between polymer latex particles shortens, causing them to come into contact and compress. The -NCO groups penetrate the particle interface and react with the -OH groups on the polymer chains to form strong urethane bonds. This connects the originally independent linear polymer molecules into a three-dimensional network structure. This chemical crosslinking greatly improves the density, hardness, solvent resistance, and water resistance of the paint film, preventing solvents in the adhesive from penetrating into the interior of the paint film.

[0084] Isocyanates and resins, like steel bars and cement, react chemically to create a robust concrete base (cross-linked paint film). Perfluoropolyethers and waxes, like oil droplets floating on the concrete surface, automatically rise to the surface during solidification, forming a non-sticky Teflon surface layer (functionally graded layer). This mechanism ensures that the coating possesses both the ultra-long weather resistance of fluorocarbon paints and excellent anti-fouling and anti-stick properties.

[0085] This high-performance coating (coating 1) exhibits the following characteristics:

[0086] Extremely low surface tension: The bond energy of fluorocarbon bonds is extremely high and their polarity is strong, resulting in extremely low surface tension. Self-adhesive adhesives typically have high surface tension and cannot wet such low-energy surfaces, leading to a very large contact angle, preventing the adhesive from spreading and penetrating.

[0087] Weak boundary layer effect: When attempting to remove a label, the adhesion force (adhesive work) between the glue and the paint surface is much less than the cohesive force of the glue itself, or less than the strength of the label paper. As a result, the damage often occurs inside the glue layer or at the interface between the glue and the paint surface, thus achieving "tore off the whole sheet without leaving any glue residue".

[0088] Microscopic smoothness and lubrication: The synergistic effect of the wax emulsion and PFPE results in an extremely smooth paint film surface (low coefficient of friction). Stains and graffiti (such as oily pen marks) can only remain outside the surface micropores and cannot "bite" into the paint film, so they can be removed with simple physical wiping or alcohol cleaning.

[0089] Example 2

[0090] This example demonstrates the application of component A and component B of the coating described in Example 1 to a particleboard surface, following the application procedure:

[0091] Pre-construction mixing: Before applying the coating to the particleboard, mix component A: component B in a ratio of 100:15 and stir well to obtain a light-curing coating; mix component A: component B in a ratio of 100:25 and stir well to obtain a heavy-curing coating.

[0092] Curing and Coating: After mixing, the light-curing and heavy-curing coatings are allowed to stand for 15 minutes to cure. First, the light-curing coating is sprayed onto the particleboard surface. After natural drying for 1.5 hours, the incompletely cured light-curing coating is treated with a dry ice sandblasting machine. The working air pressure of the dry ice sandblasting machine is 4 bar, the dry ice flow rate is 0.2~0.3 kg / min, and the spraying distance is 38~41 cm (generally, the spraying distance for strong and clear removal of paint, rust, and thick oil stains is 10~15 cm; this invention mainly utilizes the "thermal shock" effect of dry ice to reduce physical impact force and prevent damage to the substrate). After one coat, it is allowed to warm at room temperature for more than 3 hours. Then, the heavy-curing coating is sprayed onto the particleboard surface, at least once, with an interval of more than 4 hours between each coat (only one coat was sprayed in this test, and the surface was dried at room temperature for 4 hours).

[0093] After the coating dries, the dried particleboard (hereinafter referred to as Sample Board 1) is tested for anti-graffiti and waterproof performance. The specific performance indicators are as follows:

[0094] ① Use a commercially available certificate stamp to print graffiti marks on the surface of sample plate 1, such as... Figure 1 As shown; then use a common cloth to wipe away the graffiti marks, such as Figure 2 As shown; see the comparison image after half of the graffiti mark was erased. Figure 3 It can be seen that it has excellent anti-graffiti properties. The following are signs of unqualified anti-graffiti properties: obvious damage to the coating itself after graffiti, graffiti marks cannot be removed (obvious marks, bleeding, shadows after wiping; seeping into the coating and forming permanent stains, etc.), or serious damage to the appearance after cleaning. All of these are unqualified.

[0095] ② Apply commercially available self-adhesive stickers to the surface of sample plate 1 and press them down. After pressing, wait 5 minutes and then press the stickers off with your fingers. It should come off easily. Figure 4 As shown.

[0096] ③ The cross-section of sample plate 1 is precision-trimmed with a knife to expose the secondary surface layer filled with cured coating, see... Figure 5 ;Depend on Figure 5 It can be seen that in sample board 1, the coating and the wood of the subsurface layer are fixed together; the depth of the subsurface layer (with coating) can reach 0.23mm.

[0097] ④ For conventional waterproofing performance, the water absorption rate is tested according to JC / T 2663-2022 "Test Method for Water Absorption of Building Waterproof Coating Film", using the film water absorption method.

[0098] Coating water absorption test method:

[0099] After coating a fixed-size (e.g., 50mm x 50mm) wooden board surface to completely seal it, the resulting specimen is dried and weighed under standard conditions. It is then horizontally immersed in distilled water (usually for 7 days), removed, and quickly blotted dry with filter paper before being weighed again. The water absorption rate is calculated based on the difference in mass before and after immersion. A water absorption rate below 10% is a common performance requirement, while below 5% represents a superior waterproof rating.

[0100] ⑤ Extreme waterproof performance

[0101] Although some wood panels are coated with waterproof coatings, they may have good waterproof performance when soaked in water under normal conditions. However, after a period of exposure to harsh outdoor environments (such as seawater corrosion, wave impact, high / low temperature shocks, etc.), firstly, ultraviolet rays cause the polymer chains in the coating to break, making it brittle and losing its elasticity; secondly, due to the mismatch in thermal expansion and shrinkage coefficients between the coating and the wood, the rigid coating cannot keep up with the deformation of the wood under harsh environmental changes, resulting in huge shear stress at the interface; this continuous stress fatigue eventually causes micro-cracks in the coating film, providing a channel for moisture to penetrate, thus causing the waterproof system to completely fail.

[0102] Ultimate Waterproof Performance Characterization Experiment

[0103] After coating and sealing the surface of a wooden board of a fixed size (e.g., 50mm × 50mm), the resulting specimen was dried and weighed under standard conditions. It was then horizontally immersed in simulated brine, which was prepared by adding copper chloride at a concentration of 0.26 g / L to a 5% sodium chloride solution, adjusting the pH to 3.1–3.3 with glacial acetic acid, maintaining the solution temperature at 60 ± 1℃, and immersing it in an ultrasonic environment at 20 kHz for 10 days. After immersion, the surface moisture was quickly absorbed with filter paper, and the specimen was weighed again. The water absorption percentage was calculated based on the mass difference before and after immersion. A water absorption rate below 10% indicates good ultimate waterproof performance and an intact appearance, without cracks, peeling, or obvious whitening. The ultrasonic environment simulates the impact of severe ocean waves. Extensive experiments have shown that for particleboard and similar boards, the resistance of particles to separation is far lower than that of the original wood. Even if the coating adheres well to the outermost layer, damage often occurs not between the coating and the board itself, but rather within the subsurface layer – specifically, the layer of wood chips carrying the coating – which is "torn" off from the underlying substrate. Therefore, if the adhesion between the coating and the subsurface of the wood is weak, it is prone to premature failure under ultrasonic conditions.

[0104] Comparative Example 1

[0105] Group 1 Experiment: In this group of experiments, the brushing method of Example 1 (without dry ice sandblasting) was directly used to apply the coating to the original wood board / particleboard. The difference between this group of experiments and Example 2 is that the A and B components used in this group of experiments are the same, but the application process is different.

[0106] Group 2 Experiment: In this group of experiments, components A and B of Example 1 were used directly (without distinguishing between light-curing and heavy-curing coatings, both were coating 1), but the construction process of Example 2 (with dry ice sandblasting treatment added during the spraying process) was used to apply the raw wood / particleboard.

[0107] Group 3 Experiment: The only difference between this group of experiments and Example 2 is that the light-curing coating was first sprayed onto the surface of the original wood board / particleboard, and after natural drying for 4 hours, the interface of the incompletely cured light-curing coating was treated with a dry ice sandblasting machine. The rest were the same.

[0108] The control group consisted of wood panels treated with coatings in accordance with the method described in Example 1 and particleboard treated with coatings in accordance with the method described in Example 2.

[0109] The results of experiments 1-3 and the control group are shown in Table 1:

[0110] Table 1

[0111]

[0112] As can be seen from the above, even if the components are the same, if the ratio of component A and component B is different, the "thermal shock" force generated by dry ice sandblasting with a lightly cured coating with a lower degree of curing will promote the bonding with the subsurface layer of particleboard and other engineered wood products and improve the bonding with the "fragmented shell" of the subsurface. At the same time, since dry ice sublimation occurs during the process of coating not being fully cured, the impact generated by sublimation will further improve the pore structure of the subsurface layer of engineered wood products, providing a foundation for deeper penetration of the coating in the subsequent secondary spraying.

[0113] As shown in the first three sets of experiments, for particleboard, chipboard, and other engineered wood products, components A and B must first be formulated into light-curing and heavy-curing coatings. Then, specific application techniques must be employed (dry ice blasting is used to assist in the process before the light-curing coating is fully cured, and the blasting distance must be increased during dry ice blasting) to ensure good bonding between the high-performance coating described in this invention and particleboard, etc.

[0114] Comparative Example 2

[0115] Compared with Example 2, in this example, perfluoropolyether-polyethylene glycol block copolymer (Suzhou Cangmu New Materials Co., Ltd., model: PFPE-PEG-PFPE-3500) is used instead of fluorine-silicone hybrid branched perfluoropolyether phosphate, and all other aspects are the same.

[0116] In this case, particleboard was used as the test substrate. It has excellent anti-graffiti performance, but it cannot remove adhesive stickers with a simple tap. It requires wiping with a 75% ethanol aqueous solution and a sponge cloth to remove them.

[0117] Comparative Example 3

[0118] Compared with Example 2, in this example, perfluoropolyether sulfonate (Shanghai Futian Chemical Technology Co., Ltd., model: TF281) is used instead of fluorine-silicon hybrid branched perfluoropolyether phosphate, and all other aspects are the same.

[0119] In this case, particleboard was used as the test substrate. It has excellent anti-graffiti performance, but it cannot remove adhesive stickers with a simple tap. It requires wiping with a 75% ethanol aqueous solution and a sponge cloth to remove them.

[0120] As shown in Comparative Examples 2 and 3, perfluoropolyether-polyethylene glycol block copolymers, fluoro-silicone hybrid branched perfluoropolyether phosphates, and perfluoropolyether sulfonates are all perfluoropolyether derivatives, but only the fluoro-silicone hybrid branched perfluoropolyether phosphate exhibits the best performance. The reason for the superior performance of the fluoro-silicone hybrid branched perfluoropolyether phosphate may be that PFPE (perfluoropolyether) provides low surface energy, phosphate provides permanent anchoring, and the silicon hybrid branched structure provides appropriate molecular cohesion and orderly surface arrangement; it forms a covalent network with the coating matrix, making the surface layer difficult to mechanically peel off; it has no hydrophilic fragment interference, resulting in a uniform and dense surface; and it does not interfere with the crosslinking of the main resin, thus not causing flocculation. In contrast, the molecules in Comparative Examples 2 and 3 either lack anchoring groups or introduce hydrophilic or ionic fragments, leading to increased surface energy, insufficient anchoring force, or interference with curing, thus failing to achieve the "one-tap-off" anti-adhesive performance.

[0121] Comparative Example 4

[0122] Compared to Example 2, this example does not contain titanium dioxide (Ti3C2T). x Titanium carbide (Ti3C2T) x Since the same mass of filler is used instead, there is no need to prepare a corresponding "filler@titanium carbide dispersion". The filler is directly added to the hydroxy acrylic emulsion, dodecyl alcohol ester, and polyether modified heptamethyltrisiloxane and dispersed on a disperser. Everything else is the same.

[0123] Comparative Example 5

[0124] Compared to Example 2, this example does not prepare a filler@titanium carbon dispersion. Instead, the filler and titanium carbon (Ti3C2T) are first mixed. x The mixture was obtained by homogenizing and dispersing, and then the mixture was directly added to the hydroxy acrylic emulsion, dodecyl alcohol ester, and polyether-modified heptamethyltrisiloxane and dispersed on a disperser. All other steps were the same.

[0125] Comparative Example 6

[0126] Compared to Example 2, this example uses titanium carbide (TiC, molecular weight 59.89, CAS number 12070-08-5) instead of titanium carbon (Ti3C2T). x The rest are the same.

[0127] The experimental structures of comparative examples 4 to 6 are shown in Table 2:

[0128] Table 2

[0129]

[0130] Comparative Example 4 (Ti3C2T without titanium dioxide) x The water resistance is still acceptable for normal applications, but the water resistance deteriorates significantly under extreme conditions, indicating that the titanium carbon (Ti3C2T) is susceptible to damage.x Improving waterproofing in extreme environments is crucial.

[0131] Comparative Example 5 (Ti3C2T titanium dioxide) x (Undispersed): The worst performance, with obvious surface particles, indicating that Ti3C2T titanium dioxide has poor performance. x It is extremely prone to agglomeration and must be treated with a pre-dispersion process.

[0132] Comparative Example 6 (TiC substitution): The performance was also poor, indicating that Ti3C2T titanium carbide... x Its two-dimensional structure, polar surface, and high specific surface area are its key advantages, which cannot be replaced by titanium carbide (TiC).

[0133] The reason why Comparative Examples 5 and 6 failed the anti-graffiti test may be due to titanium dioxide (Ti3C2T). x Direct mixing can easily lead to a large amount of agglomeration. Only by using an ultrasonic-assisted pre-dispersion process can the dispersion effect of fillers in the resin system be improved.

[0134] As shown in Comparative Examples 4-6, the uniformity of filler dispersion and compatibility with resin significantly affect the performance of the cured coating and its penetration into the subsurface layer of wood panels such as particleboard, thus greatly impacting the ultimate waterproofing performance. Only by selecting titanium dioxide (Ti3C2T) can the waterproofing performance be significantly improved. x Disperse with existing pigments first and make titanium carbon Ti3C2T x It adsorbs onto the filler surface, thereby improving the dispersibility of existing pigments in the resin system. Furthermore, the direct addition of titanium dioxide (Ti3C2T)... x This can lead to excessive agglomeration, which in turn degrades the coating performance. Furthermore, titanium carbide (TiC) has poor compatibility with conventional fillers (such as titanium dioxide), which also degrades the coating performance, directly resulting in a poor coating appearance.

[0135] Furthermore, it should be understood that those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high-performance coating, characterized in that, Includes component A and component B; Component A comprises, by weight: Aqueous fluorocarbon emulsion: 30-50 parts; Hydroxyacrylic emulsion: 10-20 parts; Deionized water: 15-25 parts; Filler: 10-20 parts; Fluoro-silicon hybrid branched perfluoropolyether phosphate: 2-5 parts; Polyether-modified heptamethyltrisiloxane: 0.5-1.5 parts; Water-based wax emulsion: 1-3 parts; Dodecyl alcohol ester: 1-2 parts; Titanium carbide (Ti3C2T) x 1-2 servings; Component B is an aqueous isocyanate curing agent; The weight ratio of component A to component B is 100:15-25.

2. The high-performance coating according to claim 1, characterized in that, The preparation method of the fluorine-silicon hybrid branched perfluoropolyether phosphate includes the following steps:

1. Under nitrogen protection, terminal allyl perfluoropolyether and trifluoropropylmethylhydrodimethoxysilane are reacted at 75-85℃ in the presence of chloroplatinic acid catalyst to obtain a fluoro-silicon hybrid prepolymer with dimethoxysilane terminal group.

2. Dissolve the fluoro-silicon hybrid prepolymer with dimethoxysilane end group in an organic solvent, add water, then add phosphorus pentoxide, heat to 40-50℃ and react, then hydrolyze, neutralize, extract and dry to obtain fluoro-silicon hybrid branched perfluoropolyether phosphate.

3. The high-performance coating according to claim 1, characterized in that, In component A, titanium dioxide (Ti3C2T) x The filler is pre-dispersed with the filler through grinding and ultrasonication to form a filler@titanium carbon dispersion.

4. A method for manufacturing a high-performance coating according to any one of claims 1-3, characterized in that, Includes the following steps:

1. Take a portion of deionized water, filler, and titanium dioxide (Ti3C2T) from component A. x The filler @ titanium dioxide dispersion was obtained by sequential grinding and ultrasonic dispersion.

2. The hydroxyl acrylic emulsion, dodecyl alcohol ester, polyether-modified heptamethyltrisiloxane and filler@titanium carbon dispersion are mixed, first stirred and pre-dispersed, and then dispersed at high speed to obtain the initial mixture; 3. Add fluorine-silicon hybrid branched perfluoropolyether phosphate and water-based wax emulsion to the initial mixture, stir evenly, and obtain component A; 4. Mix before application, according to the weight ratio of component A: component B = 100: 15-25, and let stand to mature to obtain the high-performance coating.

5. A coating apparatus for coating wooden furniture boards with the high-performance coating according to any one of claims 1-3 or the high-performance coating obtained by the manufacturing method according to claim 4, characterized in that, When the wooden furniture board to be coated is a solid wood board, the coating device includes a sprayer, a roller coater, and a brush roller; When the wooden furniture board to be coated is an artificial board, the coating device includes a sprayer, a roller coater, a brush roller, and a dry ice sandblasting machine; the dry ice sandblasting machine is used to perform interface treatment on the coating before the first coat of paint has fully cured.

6. The coating method according to claim 5, characterized in that, The artificial boards include particleboard, chipboard, and unpainted paperboard used in paperboard furniture.

7. A method for coating wood furniture panels with the high-performance coating according to any one of claims 1-3 or the high-performance coating obtained by the manufacturing method according to claim 4, characterized in that, Includes the following steps:

1. Mix component A and component B at a weight ratio of 100:15 to obtain a light-curing coating; mix component A and component B at a weight ratio of 100:25 to obtain a heavy-curing coating.

2. Apply the light-curing coating to the surface of the wooden furniture board and allow it to dry naturally for 1.5 ± 0.2 hours; 3. When the light-curing coating is not fully cured, use a dry ice sandblasting machine for interface treatment. The dry ice sandblasting machine is used under the conditions of working air pressure of 4 bar, dry ice flow rate of 0.2-0.3 kg / min and spraying distance of 38-41 cm. After one spraying, allow it to warm up to room temperature for more than 3 hours.

4. Then apply a heavy-duty coating, at least once, with an interval of more than 4 hours between each coat. After drying, you will get a wooden furniture board coated with a high-performance coating.

8. The method according to claim 7, characterized in that, The coating method in steps 2 and 4 can be selected from spraying, roller coating or brush coating.

9. The application of the high-performance coating according to any one of claims 1-3 or the high-performance coating obtained by the manufacturing method according to claim 4 in the field of furniture.

10. The application according to claim 9, characterized in that, The high-performance coating is used for surface coating of outdoor furniture, including floating platform furniture, floating island furniture, seaside villa furniture, beach leisure area furniture, yacht marina furniture, poolside furniture, outdoor sauna room furniture, outdoor shower area furniture, marine furniture, or yacht interior furniture.

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