Wooden furniture with mothproof, scratch-resistant and flame-retardant properties and preparation method thereof

Abstract

The invention relates to wood furniture with mothproof, scratch-resistant and flame-retardant properties and a preparation method thereof, the wood furniture comprises a furniture body, and the furniture body is formed by assembling a plurality of pieces of wood; each piece of wood is subjected to pressurization soaking treatment through an insect-proof flame retardant; the surface of the furniture body is coated with a scratch-resistant layer; the scratch-resistant layer is formed by coating the surface of the furniture body with a scratch-resistant coating; according to the wood furniture, due to the dual-structure design of'internal insect-proof flame-retardant treatment and outer scratch-resistant coating ', organic combination of insect damage prevention, scratch resistance and flame retardance is achieved, and the wood furniture has lasting and comprehensive insect-proof performance and excellent scratch-resistant and flame-retardant performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of furniture manufacturing, and discloses wooden furniture with insect prevention, scratch resistance and flame resistance and a preparation method thereof. BACKGROUND

[0002] Wooden furniture is favored due to its natural texture and warm texture, but wood itself has some inherent defects, such as being easily damaged by insects, insufficient surface hardness to easily produce scratches and scratches, and flammability, which affect the service life and safety of wooden furniture.

[0003] In the prior art, a single method is usually used to solve these problems, such as spraying insect prevention agents or flame retardant coatings alone. However, these methods have the following disadvantages: first, the treatment effect is not durable, and the surface coating loses its effectiveness after being worn out; second, the direct superposition of multiple functional coatings may result in poor interlayer adhesion and easy peeling; and third, there is a lack of a systematic treatment scheme for wood from the inside to the outside. Therefore, it is of great market value to develop wooden furniture that systematically integrates multiple protective properties from substrate treatment to surface coating. SUMMARY

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present application is to provide wooden furniture with insect prevention, scratch resistance and flame resistance and a preparation method thereof.

[0005] To achieve the above-mentioned purpose, the wooden furniture with insect prevention, scratch resistance and flame resistance comprises a furniture body, the furniture body is assembled by multiple pieces of wood; each piece of wood is treated by pressure soaking with an insect prevention and flame retardant agent; the surface of the furniture body is coated with a scratch-resistant layer; and the scratch-resistant layer is formed by coating a scratch-resistant coating on the surface of the furniture body.

[0006] Further, the wood is made of beech.

[0007] Further, the insect prevention and flame retardant agent comprises the following raw materials by weight: 8-12 parts of sodium octaborate decahydrate, 2-5 parts of boric acid and 83-90 parts of deionized water.

[0008] In the present application, beech is used as the wood substrate. Beech is a diffuse-porous wood, and the insect prevention and flame retardant agent can uniformly and smoothly penetrate every part of the wood during pressure impregnation. The fine structure also ensures that the drug solution does not precipitate from the cell cavity during drying and curing, and frost appears. In addition, beech has a short growth cycle and is a sustainable forest resource.

[0009] The borate salt has very low toxicity to human and pets, no peculiar smell, and does not cause environmental pollution, but has good inhibitory effect on borer, termite and mold, blue bacteria and the like, can interfere with the metabolism of pests, kill fungi, and provide long-term protection for wood, and the boron compound can melt to form a glassy covering layer at high temperature to isolate oxygen, and can promote wood charring to release crystal water and absorb a large amount of heat, thereby preventing flame spread and inhibiting smoldering. The borate salt is not volatile and not soluble in water, and the insect prevention and fire retardant effect is not easily affected by rain or moisture, and is suitable for a wide range of regions.

[0010] Further, the scratch-resistant coating includes the following raw materials by weight: 25-35 parts of a hydroxyl polyester resin, 15-25 parts of a silicone-modified acrylic resin, 17.4-35.65 parts of a curing agent, 12-18 parts of a filler, 1-2 parts of an oxidized polyethylene wax, 1.5-3.6 parts of an additive, and 30-47 parts of a solvent.

[0011] Preferably, the hydroxyl polyester resin is selected from one of Zhenxin Setalux 1763, Changxing ER-6590, and Sanmu 1150A.

[0012] Preferably, the silicone-modified acrylic resin is selected from one of DOWSIL DC51 and Jiaseng JSS-801.

[0013] Preferably, the oxidized polyethylene wax is selected from Clariant Licolub WE4, and has a molecular weight of 4000-5000.

[0014] Further, the curing agent is an isocyanate curing agent, and the molar ratio of NCO in the curing agent to OH in the resin ranges from 1.05-1.1:1.

[0015] Preferably, the curing agent is selected from Covestro Desmodur N75.

[0016] Further, the filler includes at least one of silicon dioxide and aluminum hydroxide.

[0017] Preferably, the silicon dioxide is 4-6 parts, and the aluminum hydroxide is 8-12 parts.

[0018] Further, the silicon dioxide is fumed silicon dioxide, and has a particle size of 800-1200 mesh.

[0019] Further, the additive includes, by weight, 0.5-1 part of a dispersant, 0.2-0.5 part of a leveling agent, 0.3-0.6 part of an antifoaming agent, and 0.5-1.5 part of a light stabilizer.

[0020] Preferably, the light stabilizer is a complex hindered amine light stabilizer, and is selected from Cyasorb LS-292.

[0021] Preferably, the dispersant is selected from one of BYK-110, EFKA-4010.

[0022] Preferably, the leveling agent is a modified polysiloxane leveling agent. Preferably, the leveling agent is selected from one of BYK-306, EFKA-3777.

[0023] Preferably, the defoaming agent is a non-silicon defoaming agent.

[0024] Preferably, the defoaming agent is selected from one of BYK-052, EFKA-2020.

[0025] Further, the solvent includes propylene glycol methyl ether acetate 10-15 parts, sec-butyl acetate 10-15 parts, xylene 8-12 parts, and bivalent acid ester 2-5 parts.

[0026] The hydroxyl polyester resin in the application is used as the main film-forming material of the scratch-resistant coating, and is used to provide the hardness, fullness and mechanical strength of the paint film. The introduction of the silicone-modified acrylic resin significantly reduces the surface energy of the paint film and improves the scratch resistance of the paint film. The curing agent gives the paint film good toughness and resilience, avoids the brittle cracking of the paint film under stress, and the oxidized polyethylene wax can migrate to the surface of the paint film to further reduce the friction coefficient. The oxidized polyethylene wax can also synergistically act with the silicone-modified acrylic resin to improve the scratch resistance of the paint film.

[0027] In the application, aluminum hydroxide is used as a filler for the scratch-resistant coating. It can not only significantly enhance the mechanical strength, hardness and wear resistance of the scratch-resistant layer, but also has a synergistic flame-retardant effect with borate inside the wood. When heated, aluminum hydroxide will absorb a large amount of heat, reducing the temperature of the furniture surface. On the other hand, it will decompose to produce water vapor and aluminum oxide. The water vapor can dilute the concentration of combustible gas on the surface of the wood, and the aluminum oxide will combine with the carbonized layer to form a solid covering layer, isolating oxygen and playing a flame-retardant role. Moreover, aluminum hydroxide is economical, environmentally friendly and non-toxic.

[0028] Another object of the application is to provide a preparation method of wooden furniture with insect resistance, scratch resistance and flame retardance, comprising the following steps: (1) Pretreatment: drying the wood in a drying kiln, and controlling the moisture content of the wood to be 10%-15%; (2) Carbonization treatment: placing the pretreated wood in a carbonization kiln for carbonization treatment. (3) Immersion treatment: the carbonized wood is put into a pressure tank, vacuumized; the wood is completely submerged by injecting the insect-resistant flame retardant, then pressureized; the excess insect-resistant flame retardant is discharged by unloading pressure, the wood is again vacuumized, then the wood after immersion treatment is dried to a moisture content of 8%-12%; (4) Spraying treatment: the wood after immersion treatment is cut and polished to assemble into a white body of furniture body; the dust on the surface of the white body is cleaned, then the scratch-resistant paint is uniformly sprayed, leveling is performed, then baking is performed, and a scratch-resistant layer is formed by solidification.

[0029] Further, in step (1), the beech is sawed into wood of a size required by furniture, and is coarsely planed, the wood after coarse planing is put into a drying kiln, and is dried at 60-75°C to uniformly reduce the moisture content to 10%-15%.

[0030] Further, in step (2), the pretreated wood is put into a carbonization kiln for carbonization, the temperature in the kiln is increased to 185-195°C at a speed of 0.5-1.5°C per hour, the highest temperature is maintained for 2 to 3 hours, and superheated steam is introduced to deeply pyrolyze the wood, then the temperature is cooled to below 80°C at a speed of 1-2°C per hour, then the kiln is unloaded to age for 2 to 3 weeks, and the wood is balanced to a moisture content of 8%-12% in a natural environment.

[0031] Further, in step (3), the carbonized wood is put into a pressure tank, vacuumized to -0.09 MPa, and maintained for 30-60 min; the wood is completely submerged by injecting the insect-resistant flame retardant, pressureized to 0.8-1.2 MPa, and heated to 40-50°C, and maintained for 3-4 h; the excess insect-resistant flame retardant is discharged by unloading pressure, the wood is again vacuumized to -0.06 MPa, and maintained for 15-20 min, the wood after immersion treatment is dried at 40-60°C to a moisture content of 8%-12%, so that the insect-resistant flame retardant is fully fixed in the wood.

[0032] Further, in step (4), the wood after immersion treatment is accurately cut and polished to assemble into a white body of furniture body; the white body is finely sanded using 320-mesh sandpaper and the dust on the surface is cleaned, a high-pressure airless spraying device is used to uniformly spray a primer, leveling is performed for 8-12 min, then the white body is sent into a curing oven at 50-60°C to bake for 30-60 min; after the primer is cured, the primer is lightly abraded using 600-mesh sandpaper, then the scratch-resistant paint is sprayed, leveling is performed for 10-15 min after spraying, then the white body is placed in a curing oven at 55-60°C to bake for 30-60 min, and finally a scratch-resistant layer is formed, the thickness of the scratch-resistant layer is 35-45 μm.

[0033] Preferably, the primer is a polyurethane sealing primer, and the polyurethane sealing primer is selected from Senta J06.

[0034] The beech in the present application has high density and tight fiber structure, and the moisture absorption expansion and dry shrinkage deformation coefficient is further reduced after carbonization treatment, so that the finished furniture is not easy to crack or deform due to changes in environmental temperature and humidity, and has a longer service life. And the carbonized beech has a warm and elegant reddish brown color, which gives the wooden furniture a stable and high-end aesthetic value, and has high market acceptance.

[0035] The present application has the following advantages: The present application realizes the organic combination of insect prevention, scratch resistance and flame retardation through the double structure design of "internal insect prevention and flame retardation treatment + outer layer scratch-resistant coating", solves the pain points of insufficient performance caused by single function optimization of traditional wooden furniture. After the wood is pressure impregnated with borate insect prevention and flame retardation agent, the borate uniformly penetrates into the interior of the wood. The borate can not only interfere with the metabolism of pests and provide long-term insect prevention, but also form a glassy covering layer at high temperature and promote wood carbonization heat absorption to achieve reliable flame retardation effect. The surface scratch-resistant coating takes hydroxyl polyester resin and organic silicon modified acrylic resin as the core, and is matched with oxidized polyethylene wax and aluminum hydroxide filler. Not only does it significantly improve the scratch resistance of the paint film, but the aluminum hydroxide also forms a flame retardation synergistic effect with the borate in the wood, further strengthening the overall flame retardation performance, ensuring that the furniture can stably perform in daily use and special risk scenarios.

[0036] The present application considers both performance and safety in material selection, and the core functional components are friendly to the human body, pets and the environment. Among them, the borate insect prevention and flame retardation agent has extremely low toxicity and no odor, and is non-volatile and difficult to dissolve in water. The insect prevention and flame retardation effect is not affected by rain or moisture, and is suitable for regions such as southern humid areas and coastal areas. The hydroxyl polyester resin, organic silicon modified acrylic resin and aluminum hydroxide filler used in the scratch-resistant coating are all environmentally friendly materials, and no harmful volatile substances are released, meeting the indoor furniture environmental protection standards. The substrate is beech, which not only has a short growth cycle and belongs to sustainable forest resources, but also produces no harmful substances after carbonization. The finished furniture can be safely used in various indoor scenarios such as homes, offices and hotels, and is especially suitable for home environments with the elderly, children or pets. DETAILED DESCRIPTION

[0037] In order to facilitate the understanding of those skilled in the art, the present application will be further described below in conjunction with examples, and the content mentioned in the implementation manner is not a limitation on the present application.

[0038] In some embodiments of the present application, the wooden furniture with insect prevention, scratch resistance and flame retardation performance includes a furniture body, the furniture body is assembled by multiple pieces of wood; each piece of wood is pressure soaked and treated by an insect prevention and flame retardation agent; the surface of the furniture body is coated with a scratch-resistant layer; and the scratch-resistant layer is formed by coating the scratch-resistant coating on the surface of the furniture body.

[0039] In some embodiments of the application, the wood is made of beech.

[0040] In some embodiments of the application, the insect-resistant flame retardant comprises the following raw materials by weight: 8-12 parts of sodium octaborate decahydrate, 2-5 parts of boric acid, and 83-90 parts of deionized water.

[0041] In some embodiments of the application, the scratch-resistant coating comprises the following raw materials by weight: 25-35 parts of hydroxyl polyester resin, 15-25 parts of silicone-modified acrylic resin, 17.4-35.65 parts of curing agent, 12-18 parts of filler, 1-2 parts of oxidized polyethylene wax, 1.5-3.6 parts of auxiliary agent, and 30-47 parts of solvent.

[0042] In some embodiments of the application, the hydroxyl polyester resin is selected from one of Zannan Setalux 1763, Changxing ER-6590, and Sanmu 1150A.

[0043] In some embodiments of the application, the silicone-modified acrylic resin is selected from one of DOWSIL DC51 and Jiashang JSS-801.

[0044] In some embodiments of the application, the oxidized polyethylene wax is selected from Licolub WE4 of Clariant, with a molecular weight of 4000-5000.

[0045] In some embodiments of the application, the curing agent is an isocyanate curing agent, and the molar ratio of NCO in the curing agent to OH in the resin ranges from 1.05-1.1:1.

[0046] In some embodiments of the application, the curing agent is selected from Desmodur N75 of Covestro.

[0047] In some embodiments of the application, the filler comprises at least one of silicon dioxide and aluminum hydroxide.

[0048] In some embodiments of the application, the silicon dioxide is 4-6 parts, and the aluminum hydroxide is 8-12 parts.

[0049] In some embodiments of the application, the silicon dioxide is fumed silicon dioxide with a particle size of 800-1200 mesh.

[0050] In some embodiments of the application, the auxiliary agent comprises, by weight parts, 0.5-1 parts of dispersing agent, 0.2-0.5 parts of leveling agent, 0.3-0.6 parts of defoaming agent, and 0.5-1.5 parts of light stabilizer.

[0051] In some embodiments of the application, the light stabilizer is a complex hindered amine light stabilizer, and the light stabilizer is selected from Uvinul LS-292.

[0052] In some embodiments of the present application, the dispersant is selected from one of BYK-110, EFKA-4010.

[0053] In some embodiments of the present application, the leveling agent is a modified polysiloxane leveling agent, and the leveling agent is selected from one of BYK-306, EFKA-3777.

[0054] In some embodiments of the present application, the defoaming agent is a non-silicon defoaming agent, and the defoaming agent is selected from one of BYK-052, EFKA-2020.

[0055] In some embodiments of the present application, the solvent includes 10-15 parts of propylene glycol methyl ether acetate, 10-15 parts of sec-butyl acetate, 8-12 parts of xylene, and 2-5 parts of bivalent acid ester.

[0056] Another object of the present application is to provide a preparation method of wooden furniture with the properties of mothproofing, scratch resistance, and flame retardation, comprising the following steps: (1) Pretreatment: cutting beech into wood materials with the required size of furniture, and performing rough planing, and placing the wood materials after rough planing into a drying kiln, drying at 60-75°C, and uniformly reducing the moisture content to 10%-15%; (2) Carbonization treatment: placing the pretreated wood materials into a carbonization kiln, and increasing the temperature in the kiln to 185-195°C at a speed of 0.5-1.5°C per hour, maintaining the highest temperature for 2 to 3 hours, and passing through superheated steam, so as to deeply pyrolyze the wood materials, and then cooling to below 80°C at a speed of 1-2°C per hour, and then taking out the kiln to age for 2 to 3 weeks, so as to balance the moisture content to 8%-12% in the natural environment; (3) Immersion treatment: placing the wood materials after carbonization treatment into a pressure tank, and vacuumizing to -0.09 MPa, and maintaining for 30-60 min; injecting the mothproofing flame retardant to completely immerse the wood materials, and pressurizing to 0.8-1.2 MPa, and increasing the temperature to 40-50°C, and maintaining for 3-4 h; unloading the excess mothproofing flame retardant, and vacuumizing again to -0.06 MPa, and maintaining for 15-20 min, and drying the wood materials after immersion treatment at 40-60°C to a moisture content of 8%-12%, so as to fully fix the mothproofing flame retardant in the wood materials; (4) spray treatment: the wood material treated by immersion is precisely cut and polished to assemble into a white body of the furniture body; the white body is finely sanded using 320 mesh sandpaper and the dust on the surface is cleaned, a high-pressure airless spray equipment is used to uniformly spray the primer, the leveling time is 8-12 min, then it is sent into a curing oven at 50-50℃ to bake for 30-60 min; after the primer is cured, the primer is slightly abraded using 600 mesh sandpaper, then the scratch-resistant coating is sprayed, the leveling time after spraying is 10-15 min, then it is placed in a curing oven at 55-60℃ to bake for 30-60 min, finally the scratch-resistant layer is formed, and the thickness of the scratch-resistant layer is 35-45 μm.

[0057] In some embodiments of the present application, the primer is a polyurethane sealing primer, and the polyurethane sealing primer is selected from Senta J06.

[0058] Embodiment 1 The present embodiment provides wooden furniture with the properties of insect prevention, scratch resistance and flame retardation, which comprises a furniture body assembled by multiple pieces of wood material; each piece of wood material is treated by pressure immersion with an insect prevention and flame retardant agent; the surface of the furniture body is coated with a scratch-resistant layer; and the scratch-resistant layer is formed by coating the surface of the furniture body with a scratch-resistant coating.

[0059] Specifically, the wood material is made of beech.

[0060] Specifically, the insect prevention and flame retardant agent comprises the following raw materials by weight: 8 parts of sodium octaborate decahydrate, 2 parts of boric acid and 90 parts of deionized water.

[0061] Specifically, the scratch-resistant coating comprises the following raw materials by weight: 25 parts of hydroxyl polyester resin, 15 parts of silicone-modified acrylic resin, 17.4 parts of curing agent, 4 parts of silicon dioxide, 12 parts of aluminum hydroxide, 1 part of oxidized polyethylene wax, 0.5 parts of dispersing agent, 0.2 parts of leveling agent, 0.3 parts of defoaming agent, 0.5 parts of light stabilizer, 10 parts of propylene glycol methyl ether acetate, 10 parts of sec-butyl acetate, 8 parts of dimethylbenzene and 2 parts of bivalent acid ester.

[0062] Specifically, the hydroxyl polyester resin is selected from Zhenxin Setalux 1763.

[0063] Specifically, the silicone-modified acrylic resin is selected from DOWSIL DC51.

[0064] Specifically, the oxidized polyethylene wax is selected from Clariant Licolub WE4, and the molecular weight is 4000-5000.

[0065] Specifically, the curing agent is an isocyanate curing agent, and the molar ratio of NCO in the curing agent to OH in the resin ranges from 1.05:1.

[0066] Specifically, the curing agent is selected from Covestro Desmodur N75.

[0067] Specifically, the silica is fumed silica with a particle size of 800-1200 mesh.

[0068] Specifically, the light stabilizer is a complex hindered amine light stabilizer, and the light stabilizer is selected from Tinuvin LS-292.

[0069] Specifically, the dispersing agent is selected from BYK-110.

[0070] Specifically, the leveling agent is a modified polysiloxane leveling agent, and the leveling agent is selected from BYK-306.

[0071] Specifically, the defoaming agent is a non-silicon defoaming agent, and the defoaming agent is selected from BYK-052.

[0072] The embodiment also provides a preparation method of wooden furniture with insect prevention, scratch resistance and flame retardation, comprising the following steps: (1) Pretreatment: the beech is sawed into wood materials with sizes required by furniture, and is coarsely planed. The wood material after the coarse planing treatment is put into a drying kiln, and is dried at 60°C to uniformly reduce the water content to 10%; (2) Carbonization treatment: the pretreated wood material is put into a carbonization kiln for carbonization. The temperature in the kiln is increased to 185°C at a speed of 0.5°C per hour. The highest temperature is maintained for 3 hours. Superheated steam is introduced to make the wood material deeply pyrolyze. Then the temperature is cooled to below 80°C at a speed of 1-2°C per hour. Then the kiln is taken out to age for 3 weeks to balance the water content to 10% in the natural environment. (3) Immersion treatment: the carbonized wood material is put into a pressure tank. Vacuum is extracted to-0.09 MPa and maintained for 30 min. The insect prevention and flame retardant is injected to completely immerse the wood material. The pressure is increased to 0.8 MPa. The temperature is increased to 40°C and maintained for 4 h. The pressure is released to discharge the excess insect prevention and flame retardant. Vacuum is extracted again to-0.06 MPa and maintained for 15 min. The wood material after the immersion treatment is dried at 40°C to have a water content of 8% to make the insect prevention and flame retardant fully fixed in the wood material. (4) Spraying treatment: the wood material after the immersion treatment is precisely cut and polished to assemble into a white body of the furniture body. The white body is finely sanded and the dust on the surface is cleaned. The high-pressure airless spraying equipment is used to uniformly spray the primer. The primer is leveled for 8 min. Then the white body is sent into a curing oven at 50°C to bake for 30 min. After the primer is cured, the primer is slightly abraded by using 600 mesh sandpaper. Then the scratch-resistant coating is sprayed. After the spraying, the scratch-resistant coating is leveled for 10 min. Then the scratch-resistant coating is placed in a curing oven at 55°C to bake for 30 min. Finally, the scratch-resistant layer is formed, and the thickness of the scratch-resistant layer is 35 μm.

[0073] Specifically, the primer is a polyurethane sealing primer selected from Senta J06.

[0074] Embodiment 2 The embodiment provides wooden furniture with insect prevention, scratch resistance and flame retardation, comprising a furniture body assembled by multiple pieces of wood; each piece of wood is subjected to pressure soaking treatment by an insect prevention and flame retardation agent; a scratch-resistant layer is coated on the surface of the furniture body.

[0075] Specifically, the wood is made of beech.

[0076] Specifically, the insect prevention and flame retardation agent comprises raw materials in the following proportions by weight: 10 parts of sodium octaborate decahydrate, 4 parts of boric acid and 86 parts of deionized water.

[0077] Specifically, the scratch-resistant coating comprises raw materials in the following proportions by weight: 30 parts of hydroxyl polyester resin, 20 parts of silicone-modified acrylic resin, 25 parts of curing agent, 5 parts of silicon dioxide, 10 parts of aluminum hydroxide, 1.5 parts of oxidized polyethylene wax, 0.8 parts of dispersant, 0.4 parts of leveling agent, 0.4 parts of defoaming agent, 1 part of light stabilizer, 13 parts of propylene glycol methyl ether acetate, 12 parts of sec-butyl acetate, 10 parts of dimethylbenzene and 4 parts of bivalent acid ester.

[0078] Specifically, the hydroxyl polyester resin is selected from Changxing ER-6590.

[0079] Specifically, the silicone-modified acrylic resin is selected from Jiashang JSS-801.

[0080] Specifically, the oxidized polyethylene wax is selected from Kolene Licolub WE4 with a molecular weight of 4000-5000.

[0081] Specifically, the curing agent is an isocyanate curing agent, and the molar ratio of NCO in the curing agent to OH in the resin ranges from 1.1:1.

[0082] Specifically, the curing agent is selected from Desmodur N75 of Covestro.

[0083] Specifically, the silicon dioxide is fumed silicon dioxide with a particle size of 800-1200 mesh.

[0084] Specifically, the light stabilizer is a complex hindered amine light stabilizer selected from Li'anlong LS-292.

[0085] Specifically, the dispersant is selected from Zhanxin EFKA-4010.

[0086] Specifically, the leveling agent is a modified polysiloxane leveling agent, and the leveling agent is selected from Zhenxin EFKA-3777.

[0087] Specifically, the defoaming agent is a non-silicon defoaming agent, and the defoaming agent is selected from one of Zhenxin EFKA-2020.

[0088] The embodiment also provides a preparation method of wooden furniture with insect prevention, scratch resistance and flame retardation, comprising the following steps: (1) Pretreatment: the beech is sawed into wood materials with sizes required by furniture, and is coarsely planed. The wood material after the coarse planing treatment is put into a drying kiln, and is dried at 70°C, so that the moisture content is uniformly reduced to 12%; (2) Carbonization treatment: the pretreated wood material is put into a carbonization kiln for carbonization. The temperature in the kiln is increased to 190°C at a speed of 1°C per hour. The highest temperature is maintained for 2 hours. Superheated steam is introduced to make the wood material deeply pyrolyze. Then, the temperature is cooled to below 80°C at a speed of 1.5°C per hour. Then, the kiln is taken out and aged for 2 weeks to balance the moisture content to 8% in the natural environment. (3) Immersion treatment: the wood material after the carbonization treatment is put into a pressure tank. Vacuum is extracted to-0.09 MPa and maintained for 45 min. The insect prevention and flame retardant is injected to completely immerse the wood material. The pressure is increased to 1.0 MPa. The temperature is increased to 45°C and maintained for 4 h. The pressure is released to discharge the excess insect prevention and flame retardant. Vacuum is extracted again to-0.06 MPa and maintained for 20 min. The wood material after the immersion treatment is dried at 60°C until the moisture content is 12%, so that the insect prevention and flame retardant is fully fixed in the wood material. (4) Spraying treatment: the wood material after the immersion treatment is precisely cut and polished to assemble into a white body of the furniture body. The white body is finely sanded and the dust on the surface is cleaned. The high-pressure airless spraying equipment is used to uniformly spray the primer. The primer is leveled for 10 min. Then, the white body is sent into a curing oven at 55°C and baked for 45 min. After the primer is cured, the primer is slightly abraded by using 600-mesh sandpaper. Then, the scratch-resistant coating is sprayed. After the spraying, the primer is leveled for 12 min. Then, the white body is placed in a curing oven at 57°C and baked for 45 min. Finally, the scratch-resistant layer is formed, and the thickness of the scratch-resistant layer is 40 μm.

[0089] Specifically, the primer is a polyurethane sealing primer, and the polyurethane sealing primer is selected from Senta J06.

[0090] Embodiment 3 The embodiment provides wooden furniture with insect prevention, scratch resistance and flame retardation, comprising a furniture body assembled by a plurality of wood materials. Each wood material is treated by pressure immersion of an insect prevention and flame retardant. The surface of the furniture body is coated with a scratch-resistant layer. The scratch-resistant layer is formed by coating the surface of the furniture body with a scratch-resistant coating.

[0091] Specifically, the wood material is made of beech.

[0092] Specifically, the insect-resistant flame retardant comprises the following raw materials by weight: 12 parts of sodium octaborate decahydrate, 5 parts of boric acid and 83 parts of deionized water.

[0093] Specifically, the scratch-resistant coating comprises the following raw materials by weight: 35 parts of hydroxyl polyester resin, 25 parts of silicone-modified acrylic resin, 35.65 parts of curing agent, 6 parts of silicon dioxide, 12 parts of aluminum hydroxide, 2 parts of oxidized polyethylene wax, 1 part of dispersant, 0.5 part of leveling agent, 0.6 part of defoaming agent, 1.5 parts of light stabilizer, 15 parts of propylene glycol methyl ether acetate, 15 parts of sec-butyl acetate, 12 parts of dimethylbenzene and 5 parts of bivalent acid ester.

[0094] Specifically, the hydroxyl polyester resin is selected from three wood 1150A.

[0095] Specifically, the silicone-modified acrylic resin is selected from DOWSIL DC51.

[0096] Specifically, the oxidized polyethylene wax is selected from Clariant Licolub WE4, with a molecular weight of 4000-5000.

[0097] Specifically, the curing agent is an isocyanate curing agent, and the molar ratio of NCO in the curing agent to OH in the resin ranges from 1.1:1.

[0098] Specifically, the curing agent is selected from Covestro Desmodur N75.

[0099] Specifically, the silicon dioxide is fumed silicon dioxide with a particle size of 800-1200 mesh.

[0100] Specifically, the light stabilizer is a complex hindered amine light stabilizer, and the light stabilizer is selected from Cyasorb LS-292.

[0101] Specifically, the dispersant is selected from BYK-110 of BIC.

[0102] Specifically, the leveling agent is a modified polysiloxane leveling agent, and the leveling agent is selected from BYK-306 of BIC.

[0103] Specifically, the defoaming agent is a non-silicon defoaming agent, and the defoaming agent is selected from BYK-052 of BIC.

[0104] The embodiment also provides a preparation method of wooden furniture with insect-resistant, scratch-resistant and flame-retardant properties, comprising the following steps: (1) Pretreatment: the beech wood is sawn into lumber of the size required for furniture, and is coarsely planed. The coarsely planed lumber is placed in a drying kiln, and is dried at 75°C to reduce the moisture content uniformly to 10%; (2) Carbonization treatment: the pretreated lumber is placed in a carbonization kiln, and is carbonized at a rate of 1.5°C per hour to raise the temperature in the kiln to 195°C. The highest temperature is maintained for 2 hours, and superheated steam is introduced to cause deep pyrolysis of the wood. Subsequently, the temperature is lowered at a rate of 2°C per hour to below 80°C, and the kiln is then opened to allow the lumber to stand for 2 weeks to balance the moisture content to 12% in a natural environment; (3) Immersion treatment: the carbonized lumber is placed in a pressure tank, and is vacuumed to -0.09 MPa for 60 min. The wood is completely submerged by injecting the insect-resistant flame retardant, and is pressurized to 0.8 MPa and heated to 40°C for 3 h. The pressure is released to discharge the excess insect-resistant flame retardant, and the tank is again vacuumed to -0.06 MPa for 20 min. The immersion-treated lumber is dried at 60°C to a moisture content of 8% to allow the insect-resistant flame retardant to be fully fixed in the interior of the lumber; (4) Spray treatment: the immersion-treated lumber is precisely cut and polished to assemble into a white body of the furniture body. The white body is finely sanded using 320 mesh sandpaper and the dust on the surface is cleaned. A high-pressure airless spray equipment is used to uniformly spray a primer, and the primer is leveled for 12 min. Subsequently, the white body is sent into a curing oven at 60°C and is baked for 60 min. After the primer is cured, the primer is lightly abraded using 600 mesh sandpaper, and then a scratch-resistant coating is sprayed. After the spray, the scratch-resistant coating is leveled for 15 min, and then is placed in a curing oven at 60°C and is baked for 60 min to finally form a scratch-resistant layer. The thickness of the scratch-resistant layer is 45 μm.

[0105] Specifically, the primer is a polyurethane sealing primer, and the polyurethane sealing primer is selected from Sontara J06.

[0106] Comparative Example 1 The difference between this comparative example and Example 1 is that an equal weight part of a hydroxyl polyester resin is used to replace the silicone-modified acrylic resin in the scratch-resistant coating. The scratch-resistant coating in this comparative example includes the following raw materials in parts by weight: hydroxyl polyester resin 40 parts, curing agent 17.4 parts, silicon dioxide 4 parts, aluminum hydroxide 12 parts, oxidized polyethylene wax 1 part, dispersant 0.5 part, leveling agent 0.2 part, defoaming agent 0.3 part, light stabilizer 0.5 part, propylene glycol methyl ether acetate 10 parts, sec-butyl acetate 10 parts, xylene 8 parts, and bivalent acid ester 2 parts. The rest of the contents of this comparative example are the same as those of Example 1, and are not described here again.

[0107] Comparative Example 2 The difference between the present comparative example and Example 1 is that the equal weight parts of silicon dioxide are used to replace aluminum hydroxide. The scratch-resistant coating in the present comparative example comprises the following raw materials in weight parts: hydroxyl polyester resin 25 parts, silicone-modified acrylic resin 15 parts, curing agent 17.4 parts, silicon dioxide 16 parts, oxidized polyethylene wax 1 part, dispersant 0.5 part, leveling agent 0.2 part, defoaming agent 0.3 part, light stabilizer 0.5 part, propylene glycol methyl ether acetate 10 parts, sec-butyl acetate 10 parts, dimethylbenzene 8 parts, and bivalent acid ester 2 parts. The rest of the present comparative example is the same as Example 1, which is not described here.

[0108] Comparative Example 3 The difference between the present comparative example and Example 1 is that the equal weight parts of sodium octaborate decahydrate are used to replace boric acid. The moth-resistant flame retardant in the present comparative example comprises the following raw materials in weight parts: sodium octaborate decahydrate 10 parts and deionized water 90 parts. The rest of the present comparative example is the same as Example 1, which is not described here.

[0109] The wooden furniture with moth-resistant, scratch-resistant and flame-retardant properties prepared by Examples 1-3 and Comparative Examples 1-3 are tested for performance, and the data test results are described in the following table: Item Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Combustion growth rate index (W / s) 125 140 115 145 168 185 Total heat release (MJ) 8.2 7.5 7.1 8.8 12.3 15.6 Hardness 3 4 4 2 3 3 Wear resistance (turns) 1850 2100 2500 1200 1750 1840 Termite rating 10th level 10th level 10th level 10th level 10th level 7th level Weight loss rate 0.4% 0.5% 0.8% 0.6% 0.5% 4.5% Adhesion after water resistance 1st level 1st level 1st level 2nd level 1st level 1st level The heat release rate index (W / s) refers to the ratio of the heat release rate of the sample to the fire time, which characterizes the rate of fire growth. The higher the value, the faster the burning rate of the material at the initial stage of the fire, the greater the possibility of fire spreading, and the higher the fire hazard. The heat release rate index (W / s) is tested according to the method specified in “GB / T 27904-2011 Method of testing the ignitability of furniture and assemblies by a flame”.

[0110] The total heat release (MJ) refers to the total heat released through the combustion reaction during the entire process from the start of combustion to the end of combustion. The higher the total heat release, the higher the fire temperature, which may cause structural collapse, increased smoke toxicity, and greater hindrance to personnel evacuation and fire rescue. The total heat release (MJ) is tested according to the method specified in “GB / T 27904-2011 Method of testing the ignitability of furniture and assemblies by a flame”.

[0111] The hardness (H) refers to the ability of the paint film to resist mechanical scratches caused by pencil leads of different hardness levels. The higher the value, the stronger the scratch resistance. The hardness (H) is tested according to “GB / T 6739-2022 Paints and varnishes Determination of film hardness by the pencil method”.

[0112] Wear resistance refers to the ability of the paint film to resist the friction of a rotating rubber sanding wheel without significant loss (such as paint film wear, bare spots, gloss changes) under the action of a specific pressure and rotation speed. The more the number of revolutions, the more the paint film can withstand more friction without being damaged, and the stronger the wear resistance. Wear resistance is tested according to "GB / T 1768-2006 Paints and varnishes Determination of wear resistance Rotating rubber sanding wheel method".

[0113] Termite damage grade is a direct reflection of the degree of damage to wooden furniture by termites. The lower the grade, the more severe the damage, and the greater the impact on the structural integrity and safety of the furniture. Termite damage grade is tested according to "GB / T 18260-2015 Laboratory test method for wood preservatives against termites".

[0114] Weight loss rate is a core quantitative indicator of the degree of mass reduction of wood due to biological infestation. It is tested according to "GB / T18260-2015 Laboratory test method for wood preservatives against termites".

[0115] Water resistance after adhesion refers to the ability of the coating to maintain a strong bond with the substrate after being immersed in water for a specified period of time or exposed to a humid environment. The higher the grade, the worse the adhesion. After immersing the sample in deionized water for 168 hours, observe whether the coating bubbles or falls off, and immediately test according to "GB / T 9286-2021 Paints and varnishes Cross-cut test".

[0116] The performance indicators of Examples 1-3 of the present application are excellent and stable. Among them, the burning growth rate index of Examples 1-3 is as low as 115 W / s, and the total heat release is as low as 7.1 MJ, meeting the requirements of B1 level of flame-retardant wooden furniture; when silicon dioxide replaces aluminum hydroxide in Comparative Example 2, the burning growth rate index increases to 168 W / s and the total heat release increases to 12.3 MJ; when sodium octaborate tetrahydrate replaces boric acid in Comparative Example 3, the burning growth rate index increases to 185 W / s and the total heat release increases to 15.6 MJ; this shows that the borate inside the wood has a synergistic flame-retardant effect with aluminum hydroxide in the scratch-resistant coating: the borate can promote wood charring and endothermic, form a glassy covering layer at high temperature, and isolate oxygen, and aluminum hydroxide decomposes endothermically to release water vapor, effectively inhibiting flame spread and heat release. A single component cannot achieve the same effect.

[0117] The hardness of the embodiments 1-3 of the present application is up to 4H, the wear resistance reaches 2250 turns, and the requirements of scratch resistance and friction resistance in daily use can be met; when the hydroxyl polyester resin is used to replace the organic silicon modified acrylic resin in the comparative example, the hardness of the paint film is reduced to 2H, the wear resistance is reduced to 1200 turns, and is significantly reduced. This shows that the organic silicon modified acrylic resin is crucial to the improvement of the smoothness and scratch resistance of the paint film, the hydroxyl polyester resin provides the hardness of the paint film, the organic silicon modified acrylic resin reduces the surface energy, and the combination of the oxidized polyethylene wax further reduces the surface friction coefficient and improves the scratch resistance.

[0118] The corrosion grade of the embodiments 1-3 of the present application is 10, that is, there is no obvious corrosion, and the weight loss rate is only 0.8%, while the corrosion grade of the comparative example 3 is reduced to 7 when the single sodium octaborate decahydrate solution is used for impregnation treatment, which proves that the borate and sodium octaborate decahydrate can enhance the interference ability to the metabolism of pests, and the single borate component has a much lower pest prevention durability and efficiency than the compound system.

[0119] The borate pest prevention flame retardant in the present application has extremely low toxicity, no odor, and is not volatile and difficult to dissolve in water, and the pest prevention and flame retardation effect is not affected by rain or moisture, and is suitable for humid areas, coastal areas and other regions in the south; the scratch-resistant coating is selected from the hydroxyl polyester resin, the organic silicon modified acrylic resin and the aluminum hydroxide filler, which are all environmentally friendly materials, and no harmful volatile substances are released, which meets the indoor furniture environmental protection standard; the substrate is selected from beech, which has a short growth cycle and belongs to sustainable forest resources, and no harmful substances are generated after carbonization, and the finished furniture can be safely applied to various indoor scenes such as homes, offices and hotels, and is especially suitable for home environments with old people, children or pets; the organic silicon modified acrylic resin is used in the present application to replace part of the hydroxyl polyester resin, which enhances the wear resistance and water after adhesion of the paint film without affecting the hardness of the paint film.

[0120] The above is only a preferred embodiment of the present application, and does not limit the present application in any form, although the present application has been disclosed as above, however, it is not intended to limit the present application, any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the present application, and equivalent embodiments with equivalent changes are equivalent, but as long as it does not deviate from the technical solution of the present application, any modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the technical solution of the present application.

Claims

1. A wooden furniture with the properties of insect resistance, scratch resistance and flame retardance, characterized in that: The furniture body is assembled by multiple pieces of wood, each piece of wood is treated by pressure soaking with an insect-resistant flame retardant, and the surface of the furniture body is coated with a scratch-resistant layer formed by a scratch-resistant coating. ​ 2. The wooden furniture with mothproofing, scratch-resistant and flame-retardant properties according to claim 1, characterized in that: The wood is made of beech.

3. The wooden furniture with mothproofing, scratch-resistant and flame-retardant properties according to claim 1, characterized in that: The insect-resistant flame retardant comprises the following raw materials by weight: 8-12 parts of sodium octaborate decahydrate, 2-5 parts of boric acid, and 83-90 parts of deionized water.

4. The wooden furniture with mothproofing, scratch-resistant and flame-retardant properties according to claim 1, characterized in that: The scratch-resistant coating comprises the following raw materials by weight: 25-35 parts of hydroxyl polyester resin, 15-25 parts of silicone-modified acrylic resin, 17.4-35.65 parts of curing agent, 12-18 parts of filler, 1-2 parts of oxidized polyethylene wax, 1.5-3.6 parts of auxiliary agent, and 30-47 parts of solvent.

5. The wooden furniture with mothproofing, scratch-resistant and flame-retardant properties according to claim 4, characterized in that: The curing agent is an isocyanate curing agent, and the molar ratio of NCO in the curing agent to OH in the resin ranges from 1.05-1.1:

1.

6. The wooden furniture with mothproofing, scratch-resistant and flame-retardant properties according to claim 4, characterized in that: The filler comprises at least one of silicon dioxide and aluminum hydroxide.

7. The wooden furniture with mothproofing, scratch-resistant and flame-retardant properties according to claim 6, characterized in that: The silicon dioxide is fumed silicon dioxide with a particle size of 800-1200 mesh.

8. The wooden furniture with mothproofing, scratch-resistant and flame-retardant properties according to claim 4, characterized in that: The auxiliary agent comprises 0.5-1 parts of dispersing agent, 0.2-0.5 parts of leveling agent, 0.3-0.6 parts of defoaming agent, and 0.5-1.5 parts of light stabilizer by weight.

9. The wooden furniture with mothproofing, scratch-resistant and flame-retardant properties according to claim 4, characterized in that: The solvent comprises 10-15 parts of propylene glycol methyl ether acetate, 10-15 parts of sec-butyl acetate, 8-12 parts of xylene, and 2-5 parts of bivalent acid ester.

10. The method for preparing wooden furniture with mothproofing, scratch resistance and flame retardant properties according to any one of claims 1-9, characterized in that, The method comprises the following steps: (1) Pretreatment: drying the wood in a drying kiln to control the moisture content of the wood to 10%-15%; (2) Carbonization treatment: placing the pretreated wood in a carbonization kiln for carbonization treatment; (3) Immersion treatment: placing the pretreated wood in a pressure tank for vacuumizing treatment; injecting the insect-resistant flame retardant to completely immerse the wood, then performing pressure treatment; discharging the excess insect-resistant flame retardant, vacuumizing again, and then drying the wood after immersion treatment to a moisture content of 8%-12%; (4) Spraying treatment: cutting and polishing the wood after immersion treatment to assemble a white body of the furniture body; uniformly spraying the scratch-resistant coating on the surface of the white body after cleaning the dust, then leveling, and then baking to form the scratch-resistant layer.