Coating composition, coating method for accentuating wood grain, and coated wood

Abstract

The embodiments of the present application relate to the technical field of coating. Disclosed are a coating composition, a coating method for accentuating wood grain, and a coated wood. The coating composition and coating method provided in the present invention provide an effective solution to the problems in the prior art of the presentation of wood grain being unclear, and the coating having an excessively high hiding power and being prone to discoloration. Shellac or a shellac-based derivative material is selected as a film-forming agent, and is formulated with a suitable volatile carrier solution, thereby ensuring that a paint film formed by a coating on a wood surface is transparent and long-lasting, and prolonging the service life of the wood surface. By means of the detailed coating steps, it is ensured that the coating uniformly covers the wood surface and penetrates deep into fine pores of the wood, such that wood grain is more distinct, and wood grain blurring caused by coating accumulation or uneven coating penetration in conventional processes is prevented. In summary, the coating composition and coating method of the present invention achieve an ideal effect of both aesthetics and practicality.

Description

Finishing compositions, finishing methods that highlight wood grain, and finished wood Technical Field

[0001] This application relates to the field of coating technology, and more particularly to coating compositions, coating methods for highlighting wood grain, and coated wood. Background Technology

[0002] As urbanization continues, increasingly artificial living environments are becoming monotonous and dull. This environment inspires people's deep-seated yearning for a natural state, especially in the field of furniture and interior decoration, where people are increasingly inclined to choose products that can maintain the natural texture and color of wood, thereby creating a harmonious and relaxing living space.

[0003] However, in existing coating and finishing technologies, the common practice is to apply a lacquer film to the wood surface to reinforce the wood grain. But due to the limitations of the coating itself and the inadequacy of the finishing methods, the wood grain appearance is not satisfactory.

[0004] From the perspective of the coating itself, some common coatings may have high hiding power, which, while beneficial for protecting the wood, can also easily obscure the wood's natural grain, preventing the wood's original beauty from being fully displayed. Furthermore, some coatings may discolor or lose their luster over time, further affecting the wood's appearance.

[0005] In terms of finishing methods, traditional finishing processes have not fully considered the characteristics and texture of wood. During the finishing process, if problems such as the paint failing to penetrate the pores of the wood evenly or the paint accumulating on the wood surface occur, even transparent paint may not be able to highlight the natural texture of the wood well.

[0006] To improve this situation, we need to address both the optimization of paint formulations and the improvement of coating processes. This will better highlight the natural grain of the wood, achieving an ideal effect that is both aesthetically pleasing and practical. Summary of the Invention

[0007] The purpose of this application is to provide a more transparent and durable coating that ensures sufficient protection without altering the natural color of the wood; in addition, a coating method for use with the above coating is provided to ensure that the coating can be evenly applied to the wood surface and penetrate deep into the micropores of the wood.

[0008] A coating composition comprising:

[0009] A resin-based solid film-forming agent, wherein the resin-based solid film-forming agent is shellac or a shellac-derived material;

[0010] A volatile carrier solution, wherein the volatile carrier solution is used to dissolve a resin-type solid film-forming agent, and the volatile carrier solution is ethanol;

[0011] The coloring medium may be selected from, but is not limited to, natural mineral color sources, plant-extracted pigments, or synthetic colorants;

[0012] Adhesion accelerator, wherein the adhesion accelerator is selected from, but not limited to, phenolic compounds;

[0013] A flow modifier, wherein the flow modifier is selected from, but is not limited to, vegetable oil derivatives or mineral oil derivatives;

[0014] The coating compositions are prepared into different categories based on the different ratios of resin-based solid film-forming agents and volatile carrier solutions.

[0015] Furthermore, the coloring medium selects different types of colorants to match the desired wood grain color.

[0016] Furthermore, the coating composition also includes an anti-reflective agent selected from, but not limited to, one or more of polyacrylates, silicone or fluorocarbon compounds, modified urethanes, optically clear varnishes, nano-sized silica or alumina particles, nonionic surfactants, polyether-modified siloxanes, and ultraviolet absorbers.

[0017] A method for highlighting wood grain, the method being implemented based on the above-mentioned coating composition, comprising the following steps:

[0018] Step 1: Perform a smoothing treatment on the wood surface to obtain a smoothing coating;

[0019] Step 2: Apply a coating composition to the smoothing coating to obtain a coating base layer, and sand the coating base layer with No. 0 sandpaper.

[0020] Step 3: Apply a water-based color-inhibiting treatment to the substrate using a type II coating composition to obtain a color-controlled coating;

[0021] Step 4: Apply oil-based powder to the color-control coating to obtain a deeper coating;

[0022] Step 5: Use three types of coating compositions to perform a strengthening treatment on the deep coating layer to obtain a textured strengthening layer;

[0023] Step 6: Apply a second-class coating composition to the texture enhancement layer to obtain a glossy layer;

[0024] Step 7: Apply color blocking to the translucent layer to obtain a textured coating.

[0025] Furthermore, the leveling process specifically includes the following steps:

[0026] Step 11: Sand and fine plan the unfinished wood to remove loose dust; use 1-12 grit sandpaper. 1 Wooden sandpaper;

[0027] Step 12: Apply a coating composition to the polished unfinished wood;

[0028] Step 13: After the coating composition has dried, apply shellac putty.

[0029] Step 14: Sand the wood obtained in step 13 using #1 sandpaper.

[0030] Furthermore, the ratio of resin-type solid film-forming agent to volatile carrier solution in the coating composition is 1:7 to 1:8;

[0031] The ratio of resin-based solid film-forming agent to volatile carrier solution in the second type of coating composition is 1:4;

[0032] The ratio of resin-type solid film-forming agent to volatile carrier solution in the three types of coating compositions is 1:6.

[0033] Furthermore, the shellac putty includes a volatile carrier solution, an old powder, and a colorant, wherein the ratio of the volatile carrier solution to the old powder is 6:1.

[0034] Furthermore, the ingredients of the oil-based powder are perfume, various colored lacquer, and pigments.

[0035] Furthermore, the color-blocking process includes:

[0036] Step 71: Use the three-component coating composition to repair areas with uneven coating color;

[0037] Step 72: Sand the wood obtained in step 71 with #0 sandpaper;

[0038] Step 73: Apply a topcoat to the wood obtained in step 72. The topcoat may be phenolic varnish / nitrocellulose varnish / polyurethane varnish.

[0039] A type of wood with prominent grain, obtained using the above-described finishing method, preferably wood with large duct grooves.

[0040] Compared with related technologies, the coating composition and coating method proposed in this invention provide an effective solution to the problems of unclear wood grain display, strong coating hiding power and easy discoloration in the prior art.

[0041] First, by adding a transparency-enhancing ingredient to the coating, the transparency is significantly improved, allowing the natural grain of the wood to be clearly presented, avoiding the problem of traditional coatings obscuring the natural beauty of the wood due to their strong hiding power. Second, the use of shellac or shellac-derived materials as film-forming agents, combined with a suitable volatile carrier solution, ensures that the paint film formed on the wood surface is both transparent and durable, extending the service life of the wood surface. Furthermore, detailed coating steps ensure that the coating evenly covers the wood surface and penetrates deep into the wood's micropores, making the wood grain more distinct and avoiding the blurring of wood grain caused by paint accumulation or uneven penetration in traditional processes. Using a specific ratio of coating composition and color matching treatment solves the problem of uneven color on the wood surface, making the wood color more uniform and natural, resulting in a beautiful and harmonious overall effect. Finally, the coating method provided by this invention has clear steps, is easy to operate, improves coating efficiency, and reduces construction difficulty.

[0042] In summary, the coating composition and coating method of the present invention not only effectively solve the problem of indistinct wood grain, but also significantly improve the aesthetics and durability of wood, achieving the ideal effect of being both beautiful and practical. Attached Figure Description

[0043] Figure 1 is a flowchart of the coating method in this invention. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0045] Example 1: This example provides a coating composition comprising:

[0046] Resin-based solid film-forming agents are shellac or shellac-derived materials. Shellac or shellac-derived materials have excellent transparency and good adhesion, forming a strong protective layer without obscuring the natural grain of the wood.

[0047] Volatile carrier solution, used to dissolve resin-based solid film-forming agents, is ethanol; ethanol not only helps the coating dry quickly, but also ensures that the coating is evenly distributed on the wood surface.

[0048] The coloring medium can be selected from, but is not limited to, natural mineral color sources, plant-derived pigments, or synthetic colorants. The coloring medium is selected according to the desired wood grain color to match different types of colorants, ensuring that the final color is coordinated and unified with the wood grain itself.

[0049] Adhesion accelerators, selected from but not limited to phenolic compounds, are used to enhance the adhesion between coatings and wood, ensuring the durability of the paint film.

[0050] Flow modifiers, selected from but not limited to vegetable oil derivatives or mineral oil derivatives, are used to adjust the flowability and coatability of coatings, making them easy to apply and able to evenly cover the wood surface.

[0051] The coating composition also contains a light-enhancing agent selected from, but not limited to, one or more of polyacrylates, silicone or fluorocarbon compounds, modified urethanes, optically clear varnishes, nano-sized silica or alumina particles, nonionic surfactants, polyether-modified siloxanes, and ultraviolet absorbers. These agents not only increase the transparency of the coating but also improve its optical properties, making the natural grain of the wood more clearly visible.

[0052] Through careful formulation of the above ingredients, this coating composition can significantly enhance the clarity of wood grain without altering the natural color of the wood. The brightening agents in the coating preserve the natural texture of the wood while enhancing the protective properties of the wood surface. Furthermore, the transparency and durability of the coating are also ensured, thus improving both the aesthetics and lifespan of the wood.

[0053] Specifically, resin-based solid film-forming agents and volatile carrier solutions can be mixed in different proportions to prepare coating compositions of various types. Using a mixture of resin-based solid film-forming agents and volatile carrier solutions as the base material, the mixing ratio of the base material, adhesion promoter, flow modifier, and anti-reflective agent in the coating composition is 87:5:5:3. By rationally adjusting the proportions of each component, the clarity of the wood grain can be significantly improved without altering the natural color of the wood.

[0054] When the resin-based solid film-forming agent and volatile carrier solution in the substrate are mixed in different ratios of 1:7 to 1:8, the coating composition is called a type of coating composition; this means that each part of film-forming agent corresponds to a larger amount of volatile carrier solution. This type of composition is mainly used for initial coating, providing a preliminary protective layer to the wood surface. Due to the higher content of volatile carrier solution and the lower content of film-forming agent, the coating has good flowability, is easy to apply, and dries quickly. Furthermore, the higher proportion of volatile carrier solution allows the coating to better penetrate the wood surface, filling the tiny pores and laying a good foundation for subsequent coating steps. It is suitable for initial coating primer treatment, providing good flowability and fast drying characteristics.

[0055] When the resin-based solid film-forming agent and volatile carrier solution in the substrate are mixed in a 1:4 ratio, the coating composition is called a Class II coating composition; this means that each part of film-forming agent corresponds to a smaller amount of volatile carrier solution. This type of composition is mainly used for water stain suppression treatment and gloss finishing. Due to the relatively high film-forming agent content, the coating has stronger hiding power and can effectively suppress uneven color on the wood surface. At the same time, the higher film-forming agent content also gives the coating better adhesion and transparency, allowing it to better showcase the natural texture of the wood. It is suitable for water stain suppression treatment and gloss finishing, and has strong hiding power and transparency.

[0056] When the resin-based solid film-forming agent and volatile carrier solution in the substrate are mixed in a 1:6 ratio, the coating composition is called a Class III coating composition. This means that each part of film-forming agent corresponds to a moderate amount of volatile carrier solution. This type of composition is mainly used for texture enhancement treatment. Due to the moderate content of both film-forming agent and volatile carrier solution, the coating has both good fluidity and strong hiding power. This ratio can enhance the wood texture while maintaining good adhesion and transparency, making the wood texture more vivid. Suitable for texture enhancement treatment, maintaining good adhesion and transparency, and making the wood texture more vivid.

[0057] Example 2, as shown in Figure 1, provides a method for highlighting wood grain based on the coating composition provided in Example 1, including the following steps:

[0058] Step 1: Perform a smoothing treatment on the wood surface to obtain a smoothing coating.

[0059] Step 2: Apply a coating composition to the smoothing coating to obtain a coating base layer, and sand the coating base layer with No. 0 sandpaper.

[0060] Step 3: Apply the second-class finishing composition to the substrate to inhibit water staining, resulting in a color-controlled coating. Apply the second-class finishing composition to the substrate using a cotton ball soaked in shellac varnish, and allow it to dry for 7–14 minutes. This reduces the amount of water stain absorbed by the wood; otherwise, excessive water stain absorption will not only make the wood surface too dark but also make the color uneven.

[0061] Step 4: Apply oil-based powder to the color control coating to obtain a deeper coating.

[0062] Step 5: Use three types of coating compositions to strengthen the deep coating layer to obtain a textured layer.

[0063] Step 6: Apply a second-class coating composition to the texture enhancement layer to obtain a glossy layer.

[0064] Step 7: Apply color blocking to the translucent layer to obtain a textured coating.

[0065] The coating method provided by this invention effectively solves the problems of indistinct wood grain display, strong paint coverage, and easy discoloration in existing technologies through a series of meticulous steps. First, a leveling treatment ensures a smooth wood surface, laying the foundation for subsequent coating. Next, multiple coatings and treatments are applied using different types of coating compositions to gradually build a coating layer, ensuring uniform coverage and penetration into the wood pores, enhancing the grain display. Applying oil-based finishing powder and strengthening treatments further enhance the wood grain, and finally, color matching achieves a uniform and natural color, making the wood surface beautiful and durable. The overall method has clear steps, is easy to operate, and improves coating efficiency and effectiveness.

[0066] The leveling process specifically includes the following steps:

[0067] Step 11: Remove loose powder from the unfinished wood by sanding and fine planing; use sandpaper... High-grit sandpaper with a moderate grit is suitable for removing rough parts of the wood surface without leaving noticeable scratches. During sanding, maintain consistent pressure to ensure even sanding of every part of the wood surface, avoiding over- or under-sanding in certain areas. Sand along the grain of the wood to avoid damaging its natural texture. Fine planing further eliminates any unevenness on the wood surface, ensuring it is as smooth as possible. Use a precision planer, carefully controlling the angle and pressure to ensure a smooth surface without compromising the wood's natural texture. Remove loose powder with a clean, soft cloth or a dedicated dusting tool to remove any remaining powder and debris. Alternatively, gently blow with an air gun to ensure a clean, dust-free surface. After removing loose powder, check the wood surface again with a clean cotton cloth or soft brush to ensure no residue remains, creating a clean and tidy surface for subsequent finishing steps. This step ensures a smooth, clean, and even wood surface, laying a solid foundation for subsequent finishing work and guaranteeing the beauty and durability of the final finish.

[0068] Step 12: Apply a coating composition to the polished unfinished wood. This step involves hand-brushing with a non-shedding, flexible brush, applying even pressure and ensuring each stroke is the same length and uses a consistent amount of paint. Avoid uneven application; brush along the grain of the wood, not back and forth, as this can easily cause wrinkles. If brush bristles are found in the coating, remove them immediately with the corner of the brush or a needle. For industrial-scale applications, automated application equipment can be used for brushing or spraying to improve efficiency and quality.

[0069] Step 13: After the first type of coating composition dries, apply shellac putty. The drying process after application takes 7-15 minutes to ensure that the coating fully penetrates and cures, creating conditions for the next step. Use shellac putty to fill small defects or unevenness on the wood surface. Shellac putty consists of a volatile carrier solution, old powder, and colorant. The ratio of volatile carrier solution to old powder is 6:1. Apply the shellac putty manually with a foot knife. The surface of the putty should be slightly higher than the surrounding area. After drying and shrinking, sand it smooth with sandpaper.

[0070] Step 14: Sand the wood obtained in Step 13 using #1 sandpaper. This sandpaper is finer than the one used in Step 11, further improving the smoothness of the wood surface and creating better conditions for subsequent processes. During sanding, also operate along the wood grain to ensure a smooth and scratch-free surface.

[0071] Furthermore, the ingredients for the aged lacquer powder are perfume, various colored lacquer, and pigments. Specifically, for mahogany grain aged lacquer powder, red lacquer and iron oxide are added; for green wood grain aged lacquer powder, green lacquer is added; for coffee-colored wood grain aged lacquer powder, styrax powder or red and black lacquer are added; and for orange-yellow wood grain aged lacquer powder, yellow and red lacquer are added. The aged lacquer powder is applied by hand using bamboo brushes and allowed to dry for 8-12 hours.

[0072] Step 7, the color matching process, includes the following steps:

[0073] Step 71: Use the three-component coating composition to touch up areas with uneven color in the deep coating. Use a flat brush and various sizes of brushes to manually touch up the color, working from light to dark, one touch at a time, and do not rush. Allow it to dry for 7-15 minutes to ensure the color is set and ready for subsequent steps.

[0074] Step 72: Sand the wood obtained in step 71 with No. 0 sandpaper; this sandpaper has a very fine grit and is suitable for the final polishing process.

[0075] Step 73: Apply a topcoat to the wood obtained in Step 72. The topcoat can be phenolic varnish / nitrocellulose varnish / polyurethane varnish. Use a pig bristle brush to apply the topcoat, and work lightly. The drying time is 12-24 hours.

[0076] In summary, the coating method provided by this invention, through a series of detailed steps and the selection of different types of coating compositions at different stages, effectively solves the problems of indistinct wood grain display, strong coating coverage, and easy discoloration in the prior art.

[0077] In Example 3, the wood coated using the coating method provided in Example 2 is preferably wood with large vascular bundles. This is because wood with large vascular bundles can better showcase its natural grain and absorbs the coating more easily during the coating process, making the grain on the wood surface more distinct.

[0078] Specifically, woods with large pores (such as oak and pine) possess a natural aesthetic appeal due to their larger porosity. These larger pores not only add depth and dimension to the wood surface but also allow for better absorption of coatings during the finishing process, enabling the paint to penetrate deep into the wood and form a more uniform coating. This not only enhances the aesthetics of the wood surface but also improves the durability and protective properties of the coating.

[0079] In particular, not all woods have large vessel grooves. For woods with small vessel grooves (such as cherry and maple), heating can be used to enlarge the vessel grooves, thus making them more suitable for the finishing methods described above.

[0080] In other words, the wood in the small conduit groove needs to be pre-treated by heat before it can be coated.

[0081] The heat pretreatment requires placing the wood in a temperature-controlled environment, setting the temperature between 60°C and 80°C, and heating for approximately 1 to 2 hours. This temperature range effectively activates the moisture molecules inside the wood, causing the wood fibers to expand slightly.

[0082] During the heating process, maintain the ambient humidity between 40% and 60%. Moderate humidity helps prevent the wood from becoming too dry, which can lead to cracks.

[0083] It is important to ensure that the temperature-controlled environment provides even heating, guaranteeing that all parts of the wood are heated uniformly. Fans or other air circulation devices can be used to help distribute heat evenly. This prevents overheating of any one area of ​​the wood, which could lead to localized deformation or damage.

[0084] After the above steps, place the wood in a well-ventilated area to cool naturally. The cooling time depends on the thickness of the wood and the ambient temperature, generally requiring several hours. During cooling, maintain the ambient humidity at around 50% to help the wood's internal moisture reach a new equilibrium, preventing warping or cracking during the cooling process.

[0085] The heating process described above enlarges the wood's channels, allowing for better absorption of the coating and showcasing the wood's natural grain. Heat-treated cherry wood, like wood with large channels, exhibits clear and beautiful grain, and the coating penetrates the wood more effectively during the finishing process, achieving a harmonious and aesthetically pleasing finish.

[0086] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily made by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims, and the above embodiments should be regarded as exemplary and non-limiting.

Claims

1. A coating composition, characterized in that, Include: A resin-based solid film-forming agent, wherein the resin-based solid film-forming agent is shellac or a shellac-derived material; A volatile carrier solution, wherein the volatile carrier solution is used to dissolve a resin-type solid film-forming agent, and the volatile carrier solution is ethanol; The coloring medium may be selected from, but is not limited to, natural mineral color sources, plant-extracted pigments, or synthetic colorants; Adhesion accelerator, wherein the adhesion accelerator is selected from, but not limited to, phenolic compounds; A flow modifier, wherein the flow modifier is selected from, but is not limited to, vegetable oil derivatives or mineral oil derivatives; The coating compositions are prepared into different categories based on the different ratios of resin-based solid film-forming agents and volatile carrier solutions.

2. The coating composition according to claim 1, characterized in that, The coloring medium is selected based on the desired wood grain color, with different types of colorants chosen to match it.

3. The coating composition according to claim 2, characterized in that, The coating composition further comprises an anti-reflective agent selected from, but not limited to, one or more of polyacrylates, silicone or fluorocarbon compounds, modified urethanes, optically clear varnishes, nano-sized silica or alumina particles, nonionic surfactants, polyether-modified siloxanes, and ultraviolet absorbers.

4. A method for highlighting wood grain, the method comprising applying a finishing composition of any one of claims 2-3 to wood, characterized in that, Includes the following steps: Step 1: Perform a smoothing treatment on the wood surface to obtain a smoothing coating; Step 2: Apply a coating composition to the smoothing coating to obtain a coating base layer, and sand the coating base layer with No. 0 sandpaper. Step 3: Apply a water-based color-inhibiting treatment to the substrate using a type II coating composition to obtain a color-controlled coating; Step 4: Apply oil-based powder to the color-control coating to obtain a deeper coating; Step 5: Use three types of coating compositions to perform a strengthening treatment on the deep coating layer to obtain a textured strengthening layer; Step 6: Apply a second-class coating composition to the texture enhancement layer to obtain a glossy layer; Step 7: Apply color blocking to the translucent layer to obtain a textured coating.

5. The method for highlighting wood grain according to claim 4, characterized in that, The leveling process specifically includes the following steps: Step 11: Remove loose powder from the unfinished wood by sanding and fine planing; use sandpaper... Wooden sandpaper; Step 12: Apply a coating composition to the polished unfinished wood; Step 13: After the coating composition has dried, apply shellac putty. Step 14: Sand the wood obtained in step 13 using #1 sandpaper.

6. The method for highlighting wood grain according to claim 5, characterized in that, The ratio of resin-based solid film-forming agent to volatile carrier solution in the aforementioned coating composition is 1:7 to 1:8; The ratio of resin-based solid film-forming agent to volatile carrier solution in the second type of coating composition is 1:4; The ratio of resin-type solid film-forming agent to volatile carrier solution in the three types of coating compositions is 1:

6.

7. The method for highlighting wood grain according to claim 6, characterized in that, The shellac putty comprises a volatile carrier solution, an old powder, and a colorant, wherein the ratio of the volatile carrier solution to the old powder is 6:

1.

8. The method for highlighting wood grain according to claim 7, characterized in that, The ingredients of the oil-based varnish are perfume, various colored lacquer, and pigments.

9. A method for highlighting wood grain according to claim 8, characterized in that, The color-blocking process includes: Step 71: Use the three-component coating composition to repair areas with uneven coating color; Step 72: Sand the wood obtained in step 71 with #0 sandpaper; Step 73: Apply a topcoat to the wood obtained in step 72. The topcoat may be phenolic varnish / nitrocellulose varnish / polyurethane varnish.

10. Wood coated using the coating method of claim 9, characterized in that, The preferred timber is wood with large conduit channels.

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