Light environment-friendly shaving board for decoration and manufacturing process thereof

Abstract

The invention relates to the technical field of materials, and discloses a decorative light environment-friendly shaving board and a manufacturing process thereof.The shaving board comprises a shaving base plate and a functional coating coated on the surface of the shaving base plate, the functional coating is formed by coating the surface of the shaving base plate with functional paint and curing the functional paint, and the functional coating is formed by coating the surface of the shaving base plate with the functional paint. The functional coating is formed by mixing water-based acrylic resin serving as a film-forming substance and an inorganic modifier serving as an additive, the physical barrier effect and the super-hydrophobic effect can be utilized by adding the inorganic modifier, the strength and the hydrophobic effect of a coating formed by curing the coating are improved, the high-strength coating can effectively protect a plate, and the service life of the plate is prolonged. The super-hydrophobic effect can enable the plate to show antifouling and self-cleaning effects, and application of the plate in the decoration direction is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of materials, and in particular to a decorative lightweight environmentally friendly particle board and a manufacturing process thereof. Background Art

[0002] As an important building material, board materials are widely used in building structures, decoration and furniture manufacturing. Different types of board materials, such as plywood, particleboard, fiberboard, OSB oriented strand board, gypsum board, etc., play a key role in different fields of the construction industry due to their different performance. Among them, particleboard raw materials are widely available, have low density, and are lightweight. Compared with solid wood boards and plywood, they are easier to transport, carry and install. Therefore, they are used in interior decoration and furniture manufacturing. At present, particleboard is mainly made of wood or wood fiber materials. It is pressed under high temperature and high pressure by applying adhesives such as urea-formaldehyde resin and phenolic resin. Due to the release of harmful volatile organic compounds (VOCs) such as formaldehyde in urea-formaldehyde resin and phenolic resin, it affects indoor air quality and does not meet the standards of modern green building materials. Moreover, due to the low density of particleboard, it is easily affected by moisture and then deformed, resulting in a significant reduction in service life. Therefore, particleboard needs to be modified.

[0003] The study found that by selecting a clean adhesive and setting a coating on the surface of the particleboard, the protective effect of the coating can be utilized to reduce formaldehyde release and avoid moisture. However, most of the existing coatings use high-molecular organic matter as a film-forming substance. On the one hand, there is a defect of insufficient strength, which may cause cracks due to slight collisions and thus fail to play a protective role. On the other hand, it cannot completely prevent the penetration of water and still cannot avoid moisture. Therefore, the development of a coating with high strength and excellent waterproof performance is of great significance to the further development of particleboard. Summary of the Invention

[0004] In order to solve the problems mentioned in the background technology, the purpose of the present invention is to provide a decorative lightweight environmentally friendly particle board and a manufacturing process thereof.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A decorative lightweight environmentally friendly particleboard, comprising a particleboard substrate and a functional coating coated on the surface of the particleboard substrate;

[0007] The functional coating is formed by coating the functional coating on the surface of the wood chip substrate and curing the coating;

[0008] The functional coating comprises the following raw materials measured in parts by weight:

[0009] 60-75 parts of water-based acrylic resin, 2-6.5 parts of inorganic modifier, 0.5-1 part of defoaming agent, 0.5-1.5 parts of film-forming aid, 1-3 parts of dispersant, 0.5-1 part of leveling agent, and 1-1.5 parts of antioxidant.

[0010] As a further embodiment of the present invention, the method for preparing the functional coating comprises the following steps:

[0011] Step 1: Weigh all the raw materials according to their weight and prepare them;

[0012] Step 2: Add water-based acrylic resin, inorganic modifier, film-forming aid, dispersant, leveling agent and antioxidant to the mixer according to their weight parts, start stirring, control the speed to 1000-1500r / min, stir and mix for 20-30min, then adjust the speed to 200-300r / min, continue to add defoaming agent and stir, stop stirring after 5-10min, let it stand for 1-2h, and the functional coating can be obtained.

[0013] As a further embodiment of the present invention, the preparation method of the inorganic modifier comprises the following steps:

[0014] Step A: Using tetrahydrofuran as a medium and a halogenation modification reagent to halogenate kaolin in the presence of a catalyst to obtain halogen-modified kaolin;

[0015] Step B: In N,N-dimethylformamide medium, the halogen substituent of the halogen-modified kaolin is used as the active initiation site, and under the action of a promoter, a thiol chain extender and a functional agent are initiated to undergo chain extension polymerization to prepare an inorganic modifier.

[0016] As a further embodiment of the present invention, in step A, the catalyst is triethylamine or pyridine.

[0017] As a further embodiment of the present invention, in step A, the halogenation modification reagent is any one of chloroacetyl chloride, bromoacetyl bromide, 4-bromobutyryl chloride or 4-chlorobutyryl chloride.

[0018] As a further embodiment of the present invention, in step B, the mass ratio of the halogen-modified kaolin, the mercaptan chain extender, and the functional agent is 1:2.5-4:5-8.

[0019] As a further embodiment of the present invention, in step B, the thiol chain extender is 1,2-octanedithiol or 1,7-heptandithiol.

[0020] As a further embodiment of the present invention, in step B, the functional agent is prepared by reacting 3-fluoro-5-(trifluoromethyl)phenylacetic acid and bis(2-chloroethyl)amine hydrochloride as reactants in the presence of 1-ethyl-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide.

[0021] As a further solution of the present invention, in step B, the accelerator is a sodium hydroxide aqueous solution with a mass fraction of 15-20%.

[0022] In the above technical scheme, the hydroxyl functional groups on the surface of kaolin are firstly utilized to halogenate the kaolin using a halogenation modification reagent to obtain kaolin with halogen substituents on the surface, i.e., halogen-modified kaolin. Then, under the action of a promoter, the halogen substituents on the surface of kaolin are used as active initiation sites, and first further substitution reaction is carried out with a thiol chain extender, followed by continuous substitution with a functional agent to achieve chain extension polymerization, thereby in situ modifying the kaolin surface with a polymer substance having an alternating connection structure of trifluoromethylbenzene-long fatty chain blocks, i.e., an inorganic modifier.

[0023] The functional agent is prepared by amidation reaction of the carboxyl groups and secondary amines in the structures of 3-fluoro-5-(trifluoromethyl)phenylacetic acid and bis(2-chloroethyl)amine hydrochloride as reactants under the combined catalysis of 1-ethyl-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide.

[0024] A manufacturing process for a decorative lightweight environmentally friendly particleboard comprises the following steps:

[0025] The first step is to select bamboo and wood waste, screen out impurities, and then place it in a crusher to crush it into wood shavings;

[0026] Step 2: Add wood shavings and water-based polyurethane adhesive into a mixer at a mass ratio of 100:4-8, set the speed to 500-1000 r / min, mechanically stir for 1-2 hours, take out, and dry until the moisture content is less than 5% to form a particleboard precursor;

[0027] The third step is to place the particleboard material in the mold, control the temperature to 80-100℃, the pressure to 3-5MPa, and perform hot pressing for 5-15min. Then, use a hot press to form the material, demould it, and form a blank.

[0028] Step 4: Control the amount of glue applied to 10-20g / cm 2 , use a roller brush to evenly apply the functional coating on the surface of the blank, and then place it in a temperature environment of 100-120℃ for heating and curing.

[0029] Just form a functional coating.

[0030] Beneficial effects of the present invention:

[0031] The present invention is to prepare a polymer substance with a trifluoromethylbenzene-long fatty chain block alternating connection structure as an inorganic modifier for acrylic resin coating. First, the presence of the polymer substance can extend to each region of the acrylic resin molecular chain during the coating curing process, thereby significantly improving the interfacial compatibility between kaolin and the film-forming material acrylic resin, effectively promoting the uniform dispersion of kaolin, and the uniformly dispersed kaolin can form a physical barrier effect in the coating, which can not only extend the penetration path of water and improve the waterproof performance of the coating, but also utilize the high strength and high hardness effect of kaolin itself to enhance the strength of the coating. In addition, the polymer substance structure contains a large amount of fluorine elements and long fatty chains with extremely low surface energy. During the curing process, the presence of these structures can cause a super-hydrophobic layer to appear on the coating surface, so that the coating can have a good super-hydrophobic effect, thereby further enhancing the waterproof performance of the coating.

[0032] The present invention uses water-based polyurethane adhesive to bond wood chips, does not contain organic solvents, and does not volatilize organic pollutants. At the same time, water-based acrylic resin is selected as the film-forming material of the coating, which also does not contain organic solvents. Therefore, the prepared particle board has good environmental protection characteristics.

[0033] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] Figure 1 This is the infrared analysis test diagram of the functional agent. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] Preparation example, preparation of inorganic modifier:

[0038] Step A, ultrasonically dispersing 5 g of kaolin in a tetrahydrofuran medium to form a uniform dispersion, then adding 1.8 g of chloroacetyl chloride and 0.5 g of triethylamine to the dispersion, stirring after the addition, then heating to 35° C., keeping the temperature and stirring for 4 hours, cooling and discharging, centrifuging, washing, and vacuum drying to obtain halogen-modified kaolin;

[0039] Step B, add 1.8g of halogen-modified kaolin to N,N-dimethylformamide medium, and after uniform dispersion, continue to add 6g of 1,2-octanedithiol and 20mL of 20% mass fraction of sodium hydroxide aqueous solution. After the addition is completed, stir evenly, then heat to 65°C, keep warm for 4h, and then add 12g of functional agent. After the addition is completed, the temperature is further increased to 75°C, and after keeping warm for 18h, the temperature is lowered and the material is discharged. The product is separated, washed, and vacuum dried to obtain an inorganic modifier.

[0040] The preparation method of the functional agent is as follows:

[0041] 3-Fluoro-5-(trifluoromethyl)phenylacetic acid and bis(2-chloroethyl)amine hydrochloride are added to acetone. After the addition is completed, nitrogen is introduced for protection and stirring is started to form a uniform reaction liquid. Then, 1-ethyl-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide are added to the reaction liquid. After the addition is completed, the temperature is raised to 40°C and kept warm for 6 hours. The solvent is evaporated and the nitrogen is removed. The temperature is lowered and the material is discharged. After purification and post-treatment, the functional agent can be obtained.

[0042] Figure 1 This is the infrared analysis test chart of the functional agent, where 3000~3100cm -1 The characteristic absorption peak at 1686 cm is the carbon-hydrogen stretching vibration peak of the benzene ring skeleton. -1 The characteristic absorption peak at 1321 cm is the characteristic absorption peak of the C=O double bond of the amide group produced by the amidation reaction. -1 and 1251cm -1 The characteristic absorption peak at 749 cm is the CF characteristic absorption peak. -1 The characteristic absorption peak that appears at is the C-Cl characteristic absorption peak.

[0043] Example 1, preparation of functional coating:

[0044] Step 1: Weigh 60 parts of water-based acrylic resin, 2 parts of inorganic modifier, 0.5 parts of defoamer, 0.5 parts of film-forming aid, 1 part of dispersant, 0.5 parts of leveling agent, and 1 part of antioxidant according to weight;

[0045] Step 2: Add water-based acrylic resin, inorganic modifier, film-forming aid, dispersant, leveling agent and antioxidant to the mixer according to their weight parts, start stirring, control the speed to 1000r / min, stir and mix for 30 minutes, then adjust the speed to 200r / min, continue to add defoaming agent and stir, stop stirring after 10 minutes, let it stand for 1 hour, and the functional coating can be obtained.

[0046] The preparation method of the inorganic modifier is shown in Preparation Example 1; BYK-019 is selected as the defoaming agent; dodecanol ester is selected as the film-forming aid; BYK-996 is selected as the dispersant; BYK-358N is selected as the leveling agent; and antioxidant 1010 is selected as the antioxidant, and the rest are the same.

[0047] Example 2, preparation of functional coating:

[0048] Step 1: Weigh 65 parts of water-based acrylic resin, 6 parts of inorganic modifier, 0.6 parts of defoamer, 1 part of film-forming aid, 2 parts of dispersant, 0.8 parts of leveling agent, and 1.2 parts of antioxidant according to weight;

[0049] Step 2: Add water-based acrylic resin, inorganic modifier, film-forming aid, dispersant, leveling agent and antioxidant to the mixer according to their weight parts, start stirring, control the speed to 1200r / min, stir and mix for 25 minutes, then adjust the speed to 250r / min, continue to add defoaming agent and stir, stop stirring after 5 minutes, and let it stand for 2 hours to obtain the functional coating.

[0050] Example 3, preparation of functional coating:

[0051] Step 1: Weigh 75 parts of water-based acrylic resin, 6.5 parts of inorganic modifier, 1 part of defoamer, 1.5 parts of film-forming aid, 3 parts of dispersant, 1 part of leveling agent, and 1.5 parts of antioxidant according to weight;

[0052] Step 2: Add water-based acrylic resin, inorganic modifier, film-forming aid, dispersant, leveling agent and antioxidant to the mixer according to their weight parts, start stirring, control the speed to 1500r / min, stir and mix for 20 minutes, then adjust the speed to 300r / min, continue to add defoaming agent and stir, stop stirring after 5 minutes, and let it stand for 2 hours to obtain the functional coating.

[0053] Comparative Example 1, preparation of functional coating:

[0054] Step 1: Weigh 65 parts of water-based acrylic resin, 6 parts of kaolin, 0.6 parts of defoamer, 1 part of film-forming aid, 2 parts of dispersant, 0.8 parts of leveling agent, and 1.2 parts of antioxidant according to weight;

[0055] Step 2: Add water-based acrylic resin, kaolin, film-forming aid, dispersant, leveling agent and antioxidant to the mixer according to their weight parts, start stirring, control the speed to 1200r / min, stir and mix for 25 minutes, then adjust the speed to 250r / min, continue to add defoaming agent and stir, stop stirring after 5 minutes, and let it stand for 2 hours to obtain the functional coating.

[0056] Comparative Example 2, preparation of functional coating:

[0057] Step 1: Weigh 65 parts of water-based acrylic resin, 0.6 parts of defoaming agent, 1 part of film-forming aid, 2 parts of dispersant, 0.8 parts of leveling agent, and 1.2 parts of antioxidant according to weight;

[0058] Step 2: Add water-based acrylic resin, film-forming aid, dispersant, leveling agent and antioxidant to the mixer according to their weight parts, start stirring, control the speed to 1200r / min, stir and mix for 25 minutes, then adjust the speed to 250r / min, continue to add defoaming agent and stir, stop stirring after 5 minutes, and let it stand for 2 hours to obtain the functional coating.

[0059] Performance test: The functional coatings in the embodiments and comparative examples were made into coating test samples that met the test specifications, and various performance tests were carried out. According to the standard GB / T 16777-2008, the anti-water seepage performance test was carried out. The pressure was set to 0.5 MPa and the test time was 12 h. According to the standard GB / T 1732-2020, the impact resistance test (500 g, 500 mm) was carried out. The water contact angle was directly tested using a water contact angle meter.

[0060] The results are shown in the table below:

[0061] Water seepage impact resistance Water contact angle / ° Example 1 No water seepage No obvious cracking 154 Example 2 No water seepage No obvious cracking 155 Example 3 No water seepage No obvious cracking 154 Comparative Example 1 Severe water seepage Obvious cracks 111 Comparative Example 2 Severe water seepage Severe cracking occurs 112

[0062] The analysis and test results show that the functional coating prepared in the embodiment of the present invention has obvious good waterproof performance, high strength, and a water contact angle greater than 150°, and has an anti-fouling and self-cleaning effect.

[0063] After the inorganic modifier is replaced with unsurface-modified kaolin, it cannot be evenly dispersed due to the obvious interfacial incompatibility effect with the acrylic resin, making it difficult to form an effective physical barrier layer. It also does not contain fluorine elements, resulting in a significant decline in the performance of the coating.

[0064] A decorative lightweight environmentally friendly particleboard is prepared using the functional coating prepared in the embodiment of the present invention. The specific manufacturing process includes the following steps:

[0065] The first step is to select bamboo and wood waste, screen out impurities, and then place it in a crusher to crush it into wood shavings;

[0066] The second step is to add wood chips and water-based polyurethane adhesive into a mixer at a mass ratio of 100:6, set the speed to 1000r / min, mechanically stir for 1 hour, take out, and dry until the moisture content is less than 5% to form a particleboard precursor;

[0067] The third step is to place the particleboard material in the mold, control the temperature to 100 ° C, the pressure to 5 MPa, and hot press for 15 minutes, use a hot press to form, demould, and form a blank;

[0068] Step 4: Control the glue coating amount to 15g / cm 2 Use a roller brush to evenly apply the functional coating on the surface of the blank, and then place it in a temperature environment of 120°C for heating and curing to form a functional coating.

[0069] Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enable any technician in the field to practice the present invention, including making and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The scope of patent protection of the present invention is defined by the claims and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements similar to the literal description of the claims, or if they include equivalent structural elements that are not substantially different from the literal description of the claims, then these other embodiments should also be included in the scope of the claims.

[0070] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A decorative lightweight environmentally friendly particleboard, characterized in that: It includes a particle board and a functional coating coated on the surface of the particle board; The functional coating is formed by coating the functional coating on the surface of the wood chip substrate and curing the coating; The functional coating comprises the following raw materials measured in parts by weight: 60-75 parts of water-based acrylic resin, 2-6.5 parts of inorganic modifier, 0.5-1 part of defoaming agent, 0.5-1.5 parts of film-forming aid, 1-3 parts of dispersant, 0.5-1 part of leveling agent, and 1-1.5 parts of antioxidant.

2. The decorative lightweight environmentally friendly particle board according to claim 1, characterized in that: The preparation method of the functional coating comprises the following steps: Step 1: Weigh all the raw materials according to their weight and prepare them; Step 2: Add water-based acrylic resin, inorganic modifier, film-forming aid, dispersant, leveling agent and antioxidant to the mixer according to their weight parts, start stirring, control the speed to 1000-1500r / min, stir and mix for 20-30min, then adjust the speed to 200-300r / min, continue to add defoaming agent and stir, stop stirring after 5-10min, let it stand for 1-2h, and the functional coating can be obtained.

3. The decorative lightweight environmentally friendly particle board according to claim 1, characterized in that: The preparation method of the inorganic modifier comprises the following steps: Step A: Using tetrahydrofuran as a medium and a halogenation modification reagent to halogenate kaolin in the presence of a catalyst to obtain halogen-modified kaolin; Step B: In N,N-dimethylformamide medium, the halogen substituent of the halogen-modified kaolin is used as the active initiation site, and under the action of a promoter, a thiol chain extender and a functional agent are initiated to undergo chain extension polymerization to prepare an inorganic modifier.

4. The decorative lightweight environmentally friendly particle board according to claim 3, characterized in that: In step A, the catalyst is triethylamine or pyridine.

5. The decorative lightweight environmentally friendly particle board according to claim 3, characterized in that: In step A, the halogenation modification reagent is any one of chloroacetyl chloride, bromoacetyl bromide, 4-bromobutyryl chloride or 4-chlorobutyryl chloride.

6. The decorative lightweight environmentally friendly particle board according to claim 3, characterized in that: In step B, the mass ratio of the halogen-modified kaolin, the mercaptan chain extender and the functional agent is 1:2.5-4:5-8.

7. The decorative lightweight environmentally friendly particle board according to claim 3, characterized in that: In step B, the thiol chain extender is 1,2-octanedithiol or 1,7-heptandithiol.

8. The decorative lightweight environmentally friendly particle board according to claim 3, characterized in that: In step B, the functional agent is prepared by reacting 3-fluoro-5-(trifluoromethyl)phenylacetic acid and bis(2-chloroethyl)amine hydrochloride in the presence of 1-ethyl-(3-dimethylaminopropyl)carbodiimide and N-hydroxysuccinimide.

9. The decorative lightweight environmentally friendly particle board according to claim 3, characterized in that: In step B, the accelerator is a sodium hydroxide aqueous solution with a mass fraction of 15-20%.

10. A process for manufacturing a decorative lightweight environmentally friendly particle board according to claim 1, characterized in that: The following steps are involved: The first step is to select bamboo and wood waste, screen out impurities, and then place it in a crusher to crush it into wood shavings; Step 2: Add wood shavings and water-based polyurethane adhesive into a mixer at a mass ratio of 100:4-8, set the speed to 500-1000 r / min, mechanically stir for 1-2 hours, take out, and dry until the moisture content is less than 5% to form a particleboard precursor; The third step is to place the particleboard material in the mold, control the temperature to 80-100℃, the pressure to 3-5MPa, and perform hot pressing for 5-15min. Then, use a hot press to form the material, demould it, and form a blank. Step 4: Control the amount of glue applied to 10-20g / cm 2 , use a roller brush to evenly apply the functional coating on the surface of the blank, and then place it in a temperature environment of 100-120℃ for heating and curing to form a functional coating.

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