Plate with antibacterial and insect-repelling functions and preparation method thereof

Abstract

The invention discloses a plate with antibacterial and insect-repelling functions and a preparation method thereof. The board is a multi-layer composite board prepared by dipping veneers with Chinese herbal medicine extracts with antibacterial and insect-repelling effects and bonding and pressing the veneers. In the bonding and hot pressing processes of the board, no formaldehyde component is released, and the board has the antibacterial and insect-repelling effects. And in the plate steeping liquor, a humifuse euphorbia herb extract and a phyllanthus urinaria extract are combined, and a cortex meliae extract and a radix berberidis extract are combined, so that the antibacterial and parasite expelling effects of the plate are improved, and synergistic interaction is achieved.

Description

Technical Field

[0001] This invention belongs to the field of furniture board technology, specifically relating to a board with antibacterial and insect-repellent functions and its preparation method. Background Technology

[0002] Furniture panels are mostly made of wood, which, due to its unique properties and affordability, has become an indispensable core material. From mass-market particleboard to mid-to-high-end plywood and fiberboard, various types of panels not only shape living spaces but also bear the complex burden of balancing performance, cost, and the environment. A systematic examination of their advantages and disadvantages is not only crucial for consumers' informed choices but also influences the sustainable development path of the furniture industry.

[0003] The core advantages of wood-based panels lie primarily in their superior physical stability and economic efficiency. Compared to traditional solid wood, engineered wood panels, through the recombination of wood fibers or fragments and the application of adhesives under high pressure, effectively overcome the inherent anisotropy of solid wood, significantly reducing the risk of deformation and cracking caused by changes in humidity and temperature. For example, plywood uses a structure where adjacent layers of wood grain are arranged perpendicularly, ensuring uniform strength in all directions; while oriented strand board (OSB) achieves stronger longitudinal load-bearing capacity through oriented strand board technology. From a resource utilization perspective, panels can fully utilize small-diameter timber, branches, and even recycled wood, significantly improving the comprehensive utilization rate of timber, reducing dependence on large virgin forests, and offering both cost and environmental advantages. Furthermore, the uniform specifications of panels facilitate industrialized mass production and standardized design, providing a material foundation for the popularization of modern minimalist furniture.

[0004] However, wood-based panels also have significant drawbacks, primarily in terms of chemical safety and durability limitations. Most engineered wood panels use aldehyde-based adhesives such as urea-formaldehyde resin, which continuously release formaldehyde during use, potentially causing indoor air pollution and posing a long-term health threat. Although E0-grade and formaldehyde-free panels are becoming increasingly popular, their higher cost prevents widespread adoption. Regarding durability, once the surface coating of a panel is damaged, the exposed substrate is highly susceptible to moisture absorption and swelling, and repairs are far more difficult than with solid wood. In particular, the holding power of screws decreases significantly after repeated disassembly and assembly, affecting the furniture's lifespan. Furthermore, from an aesthetic and value perspective, panels lack the unique texture and warm feel of natural wood; their standardized appearance fails to meet high-end customization needs and lacks the collectible value and emotional warmth of solid wood furniture.

[0005] Furthermore, wood-based panels generally have weak natural antibacterial and insect-resistant properties. Untreated panels themselves are a good source of nutrition for mold, and their loose and porous structure provides an ideal living space for pests such as wood-boring insects and termites. Summary of the Invention

[0006] The purpose of this invention is to provide a board material with antibacterial and insect-repellent functions and its preparation method.

[0007] A board material with antibacterial and insect-repellent functions, wherein the board material is made by impregnating veneers with extracts of traditional Chinese medicines with antibacterial and insect-repellent effects, and then bonding and pressing the veneers together to prepare a multi-layer composite board material.

[0008] The thickness of the single veneer is 0.5-6mm, and the number of single veneer layers in the multi-layer composite board is 3-30.

[0009] The herbal extract with antibacterial and insecticidal effects is a mixture of *Euphorbia humifusa* extract and *Phyllanthus urinaria* extract in a mass ratio of 3:1.

[0010] The extraction method of the *Euphorbia humifusa* extract is as follows: Take fresh *Euphorbia humifusa*, add 1-2 parts by weight of water to make a slurry, then add 1-3 parts by weight of water, stir evenly, centrifuge to remove the precipitate, take the supernatant, add activated carbon for decolorization, filter to remove the activated carbon, concentrate the filtrate to 5-10% of the original volume, and it is prepared.

[0011] The extraction method of Phyllanthus urinaria extract is as follows: Take fresh Phyllanthus urinaria, add 1-3 parts by weight of water and beat into a slurry, then add 1-3 parts by weight of water, stir evenly, centrifuge to remove the precipitate, take the supernatant, add activated carbon for decolorization, filter to remove activated carbon, concentrate the filtrate to 7-15% of the original volume, and it is prepared.

[0012] The herbal extract with antibacterial and insecticidal effects is a mixture of neem bark extract and three-needle extract in a weight ratio of 1:1.

[0013] The extraction method of the neem bark extract is as follows: take neem bark, sun-dry or oven-dry, grind into powder, pass through a 60-120 mesh sieve, add 3-8 times the weight of water and reflux extract 3 times, combine the filtrates, add activated carbon for decolorization, filter to remove activated carbon, concentrate the filtrate to 8-12% of the original volume, and it is prepared.

[0014] The extraction method of the three needle extract is as follows: take three needles, sun-dry or oven-dry, grind into powder, pass through a 60-120 mesh sieve, add 4-10 times the weight of water and reflux extract 3 times, combine the filtrates, add activated carbon for decolorization, filter to remove activated carbon, concentrate the filtrate to 8-15% of the original volume, and it is prepared.

[0015] The preparation method of the board with antibacterial and insect-repellent functions is carried out according to the following steps: immersing the veneer in a traditional Chinese medicine extract with antibacterial and insect-repellent effects for 5-10 hours; removing and drying it; applying soybean protein adhesive between adjacent veneers, with each layer of soybean protein adhesive applied at a rate of 30-50 g / m². 2Hot pressing is used for adhesive molding. The hot pressing temperature is 100-120℃ and the time is 15-25 minutes.

[0016] The soybean protein adhesive is prepared as follows: Take 80-120 parts by weight of defatted soybean powder and 10-30 parts by weight of aluminum hydroxide, add 1000-2000 parts by weight of water, stir for 5-10 minutes, then add 10-20 parts by weight of guanidine hydrochloride and 10-20 parts by weight of sodium dodecylbenzene sulfonate, and stir for 10-20 minutes; before use, add 10-30 parts by weight of crosslinking agent and mix evenly; the crosslinking agent is WSR-6101 type or WSR-6690 type epoxy resin.

[0017] The beneficial effects of this invention are as follows: During the bonding and hot-pressing process, the boards of this invention do not release formaldehyde and possess antibacterial and insect-repellent properties. The combination of *Euphorbia humifusa* extract and *Phyllanthus urinaria* extract, as well as the combination of *Melia azedarach* bark extract and *Smilax china* extract in the board impregnation solution, enhances the antibacterial and insect-repellent effects of the boards, exhibiting a synergistic effect. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more comprehensive description will be given below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the present invention.

[0019] Example 1

[0020] A type of board with antibacterial and insect-repellent functions, wherein the board is made by impregnating veneers with extracts of traditional Chinese medicine with antibacterial and insect-repellent effects, and bonding and pressing the veneers (wood) together to prepare a multi-layer composite board; the thickness of the veneers is 2mm, and the number of veneer layers in the multi-layer composite board is 12; the extracts of traditional Chinese medicine with antibacterial and insect-repellent effects are a mixture of extracts of Euphorbia humifusa and Phyllanthus urinaria at a mass ratio of 3:1.

[0021] The extraction method of the *Euphorbia humifusa* extract is as follows: Take fresh *Euphorbia humifusa*, add 1 part by weight of water and beat into a slurry, then add 2 parts by weight of water, stir evenly, centrifuge to remove the precipitate, take the supernatant, add activated carbon for decolorization, filter to remove the activated carbon, concentrate the filtrate to 8% of the original volume, and it is prepared.

[0022] The extraction method of Phyllanthus urinaria extract is as follows: Take fresh Phyllanthus urinaria, add 1 part by weight of water and beat into a slurry, then add 2 parts by weight of water, stir evenly, centrifuge to remove the precipitate, take the supernatant, add activated carbon for decolorization, filter to remove activated carbon, concentrate the filtrate to 8% of the original volume, and it is prepared.

[0023] The preparation method of the board with antibacterial and insect-repellent functions is carried out according to the following steps: immersing the veneer in a traditional Chinese medicine extract with antibacterial and insect-repellent effects for 8 hours; removing and drying it; applying soybean protein adhesive between adjacent veneers, with each layer of soybean protein adhesive applied at a rate of 40 g / m². 2 Hot pressing is used for adhesive molding at a temperature of 110℃ for 20 minutes.

[0024] The soybean protein adhesive is prepared as follows: Take 100 parts of defatted soybean powder and 20 parts of aluminum hydroxide by weight, add 1500 parts of water, stir for 8 minutes, then add 15 parts of guanidine hydrochloride and 15 parts of sodium dodecylbenzene sulfonate, stir for 15 minutes; before use, add 20 parts of WSR-6101 epoxy resin and mix evenly.

[0025] Example 2

[0026] A type of board with antibacterial and insect-repellent functions, wherein the board is made by impregnating veneers with extracts of traditional Chinese medicine with antibacterial and insect-repellent effects, and bonding and pressing the veneers (wood) together to prepare a multi-layer composite board; the thickness of the veneers is 3mm, and the number of veneer layers in the multi-layer composite board is 10; the extracts of traditional Chinese medicine with antibacterial and insect-repellent effects are a mixture of neem bark extract and three needle extract in a weight ratio of 1:1.

[0027] The extraction method of the neem bark extract is as follows: take neem bark, sun-dry or oven-dry, grind into powder, pass through a 100-mesh sieve, add 6 times the weight of water and reflux extract 3 times, combine the filtrates, add activated carbon for decolorization, filter to remove activated carbon, concentrate the filtrate to 10% of the original volume, and it is prepared.

[0028] The extraction method of the three needle extract is as follows: take three needles, sun-dry or oven-dry, grind into powder, pass through a 100-mesh sieve, add 6 times the weight of water and reflux extract 3 times, combine the filtrates, add activated carbon for decolorization, filter to remove activated carbon, concentrate the filtrate to 10% of the original volume, and it is prepared.

[0029] The preparation method of the board with antibacterial and insect-repellent functions is carried out according to the following steps: immersing the veneer in a traditional Chinese medicine extract with antibacterial and insect-repellent effects for 6 hours; removing and drying it; applying soybean protein adhesive between adjacent veneers, with each layer of soybean protein adhesive applied at a rate of 35g / m². 2 Hot pressing is used for adhesive molding at a temperature of 100℃ for 25 minutes.

[0030] The soybean protein adhesive is prepared as follows: Take 80 parts by weight of defatted soybean powder and 12 parts by weight of aluminum hydroxide, add 1200 parts by weight of water, stir for 6 minutes, then add 12 parts by weight of guanidine hydrochloride and 12 parts by weight of sodium dodecylbenzene sulfonate, and stir for 12 minutes; before use, add 12 parts by weight of WSR-6690 epoxy resin and mix evenly.

[0031] Example 3

[0032] A type of board with antibacterial and insect-repellent functions is disclosed. The board is constructed by impregnating veneers with extracts of traditional Chinese medicinal herbs that have antibacterial and insect-repellent effects, and then bonding and pressing the veneers (wood) together to prepare a multi-layer composite board. The thickness of the veneers is 4 mm, and the multi-layer composite board has 6 veneer layers. The extracts of traditional Chinese medicinal herbs with antibacterial and insect-repellent effects are a mixture of *Euphorbia humifusa* extract and *Phyllanthus urinaria* extract at a mass ratio of 3:1.

[0033] The extraction method of the *Euphorbia humifusa* extract is as follows: Take fresh *Euphorbia humifusa*, add 2 parts by weight of water and beat into a slurry, then add 2 parts by weight of water, stir evenly, centrifuge to remove the precipitate, take the supernatant, add activated carbon for decolorization, filter to remove the activated carbon, concentrate the filtrate to 6% of the original volume, and it is prepared.

[0034] The extraction method of Phyllanthus urinaria extract is as follows: Take fresh Phyllanthus urinaria, add 2 parts by weight of water and beat into a slurry, then add 1 part by weight of water, stir evenly, centrifuge to remove the precipitate, take the supernatant, add activated carbon for decolorization, filter to remove the activated carbon, concentrate the filtrate to 12% of the original volume, and it is prepared.

[0035] The preparation method of the board with antibacterial and insect-repellent functions is carried out according to the following steps: immersing the veneer in a traditional Chinese medicine extract with antibacterial and insect-repellent effects for 9 hours; removing and drying it; applying soybean protein adhesive between adjacent veneers, with each layer of soybean protein adhesive applied at a rate of 50 g / m². 2 Hot pressing is used for adhesive molding at a temperature of 120℃ for 15 minutes.

[0036] The soybean protein adhesive is prepared as follows: Take 120 parts by weight of defatted soybean powder and 30 parts by weight of aluminum hydroxide, add 2000 parts by weight of water, stir for 10 minutes, then add 20 parts by weight of guanidine hydrochloride and 20 parts by weight of sodium dodecylbenzene sulfonate, and stir for 20 minutes; before use, add 30 parts by weight of WSR-6690 epoxy resin and mix evenly.

[0037] Comparative Example 1

[0038] A board material with antibacterial and insect-repellent functions, wherein the board material is made by impregnating veneer with extract of Euphorbia humifusa, which has antibacterial and insect-repellent effects, and bonding and pressing the veneer (wood) together to prepare a multi-layer composite board material; the thickness of the veneer is 2mm, and the number of veneer layers in the multi-layer composite board material is 12.

[0039] The extraction method of the *Euphorbia humifusa* extract is as follows: Take fresh *Euphorbia humifusa*, add 1 part by weight of water and beat into a slurry, then add 2 parts by weight of water, stir evenly, centrifuge to remove the precipitate, take the supernatant, add activated carbon for decolorization, filter to remove the activated carbon, concentrate the filtrate to 8% of the original volume, and it is prepared.

[0040] The preparation method of the board with antibacterial and insect-repellent functions is carried out according to the following steps: immersing the veneer in an extract of *Euphorbia humifusa* with antibacterial and insect-repellent effects for 8 hours; removing and drying it; applying soybean protein adhesive between adjacent veneers, with each layer of soybean protein adhesive applied at a rate of 40 g / m². 2 Hot pressing is used for adhesive molding at a temperature of 110℃ for 20 minutes.

[0041] The soybean protein adhesive is prepared as follows: Take 100 parts of defatted soybean powder and 20 parts of aluminum hydroxide by weight, add 1500 parts of water, stir for 8 minutes, then add 15 parts of guanidine hydrochloride and 15 parts of sodium dodecylbenzene sulfonate, stir for 15 minutes; before use, add 20 parts of WSR-6101 epoxy resin and mix evenly.

[0042] Comparative Example 2

[0043] A board material with antibacterial and insect-repellent functions, wherein the board material is made by impregnating veneer with Phyllanthus urinaria extract which has antibacterial and insect-repellent effects, and bonding and pressing the veneer (wood) together to prepare a multi-layer composite board material; the thickness of the veneer is 2mm, and the number of veneer layers in the multi-layer composite board material is 12.

[0044] The extraction method of Phyllanthus urinaria extract is as follows: Take fresh Phyllanthus urinaria, add 1 part by weight of water and beat into a slurry, then add 2 parts by weight of water, stir evenly, centrifuge to remove the precipitate, take the supernatant, add activated carbon for decolorization, filter to remove activated carbon, concentrate the filtrate to 8% of the original volume, and it is prepared.

[0045] The preparation method of the board with antibacterial and insect-repellent functions is carried out according to the following steps: immersing the veneer in Phyllanthus urinaria extract, which has antibacterial and insect-repellent effects, for 8 hours; removing and drying it; applying soybean protein adhesive between adjacent veneers, with each layer of soybean protein adhesive applied at a rate of 40 g / m². 2 Hot pressing is used for adhesive molding at a temperature of 110℃ for 20 minutes.

[0046] The soybean protein adhesive is prepared as follows: Take 100 parts of defatted soybean powder and 20 parts of aluminum hydroxide by weight, add 1500 parts of water, stir for 8 minutes, then add 15 parts of guanidine hydrochloride and 15 parts of sodium dodecylbenzene sulfonate, stir for 15 minutes; before use, add 20 parts of WSR-6101 epoxy resin and mix evenly.

[0047] Comparative Example 3

[0048] A board material with antibacterial and insect-repellent functions, wherein the board material is made by impregnating veneer with neem bark extract which has antibacterial and insect-repellent effects, and bonding and pressing the veneer (wood) together to prepare a multi-layer composite board material; the thickness of the veneer is 3mm, and the number of veneer layers in the multi-layer composite board material is 10.

[0049] The extraction method of the neem bark extract is as follows: take neem bark, sun-dry or oven-dry, grind into powder, pass through a 100-mesh sieve, add 6 times the weight of water and reflux extract 3 times, combine the filtrates, add activated carbon for decolorization, filter to remove activated carbon, concentrate the filtrate to 10% of the original volume, and it is prepared.

[0050] The preparation method of the board with antibacterial and insect-repellent functions is carried out according to the following steps: immersing the veneer in a neem bark extract with antibacterial and insect-repellent effects for 6 hours; removing and drying it; applying soybean protein adhesive between adjacent veneers, with each layer of soybean protein adhesive applied at a rate of 35 g / m². 2 Hot pressing is used for adhesive molding at a temperature of 100℃ for 25 minutes.

[0051] The soybean protein adhesive is prepared as follows: Take 80 parts by weight of defatted soybean powder and 12 parts by weight of aluminum hydroxide, add 1200 parts by weight of water, stir for 6 minutes, then add 12 parts by weight of guanidine hydrochloride and 12 parts by weight of sodium dodecylbenzene sulfonate, and stir for 12 minutes; before use, add 12 parts by weight of WSR-6690 epoxy resin and mix evenly.

[0052] Comparative Example 4

[0053] A board material with antibacterial and insect-repellent functions, wherein the board material is made by impregnating veneer with extract of three needles which has antibacterial and insect-repellent effects, and bonding and pressing the veneer (wood) together to prepare a multi-layer composite board material; the thickness of the veneer is 3mm, and the number of veneer layers in the multi-layer composite board material is 10.

[0054] The extraction method of the three needle extract is as follows: take three needles, sun-dry or oven-dry, grind into powder, pass through a 100-mesh sieve, add 6 times the weight of water and reflux extract 3 times, combine the filtrates, add activated carbon for decolorization, filter to remove activated carbon, concentrate the filtrate to 10% of the original volume, and it is prepared.

[0055] The preparation method of the board with antibacterial and insect-repellent functions is carried out according to the following steps: immersing the veneer in an extract of *Trifolium repens* with antibacterial and insect-repellent effects for 6 hours; removing and drying it; applying soybean protein adhesive between adjacent veneers, with each layer of soybean protein adhesive applied at a rate of 35 g / m². 2 Hot pressing is used for adhesive molding at a temperature of 100℃ for 25 minutes.

[0056] The soybean protein adhesive is prepared as follows: Take 80 parts by weight of defatted soybean powder and 12 parts by weight of aluminum hydroxide, add 1200 parts by weight of water, stir for 6 minutes, then add 12 parts by weight of guanidine hydrochloride and 12 parts by weight of sodium dodecylbenzene sulfonate, and stir for 12 minutes; before use, add 12 parts by weight of WSR-6690 epoxy resin and mix evenly.

[0057] Experimental Example

[0058] The antibacterial properties of the boards prepared in Examples 1-3 and Comparative Examples 1-4 were determined according to the standard LY / T 1926-2020 "Testing and Grading of Antibacterial Properties of Wood-based Panels and Wood (Bamboo) Products". The antibacterial rate was statistically analyzed using SPSS 24.0 software. Measurement data were analyzed using... (mean ± standard deviation) represents the mean. The Kolmogorov-Smirnov test was used to test the normality of the data. For normally distributed data, a t-test was used to compare the differences in means between two groups, with P < 0.05 considered statistically significant. The results are shown in Table 1.

[0059] Table 1

[0060]

[0061] Note: * indicates that compared with Example 1 group, P<0.05.

[0062] According to GB / T 18260-2015 standard, the toxicity of extracts of *Euphorbia humifusa*, *Phyllanthus urinaria*, a combination of *Euphorbia humifusa* and *Phyllanthus urinaria* extracts, *Melia azedarach* bark extract, *Smilax china* extract, and a combination of *Melia azedarach* bark extract and *Smilax china* extract to termites was determined. The total amount of pesticide used in each experiment was the same. The results are shown in Table 2.

[0063] Table 2

[0064]

[0065] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A type of board with antibacterial and insect-repellent functions, characterized in that, The board is made by impregnating veneers with extracts of traditional Chinese medicine that have antibacterial and insect-repellent effects, and then bonding and pressing the veneers together to prepare a multi-layer composite board.

2. The board material with antibacterial and insect-repellent functions according to claim 1, characterized in that, The thickness of the single veneer is 0.5-6mm, and the number of single veneer layers in the multi-layer composite board is 3-30.

3. The board material with antibacterial and insect-repellent functions according to claim 1, characterized in that, The herbal extract with antibacterial and insecticidal effects is a mixture of *Euphorbia humifusa* extract and *Phyllanthus urinaria* extract in a mass ratio of 3:

1.

4. The board material with antibacterial and insect-repellent functions according to claim 3, characterized in that, The extraction method of the *Euphorbia humifusa* extract is as follows: Take fresh *Euphorbia humifusa*, add 1-2 parts by weight of water to make a slurry, then add 1-3 parts by weight of water, stir evenly, centrifuge to remove the precipitate, take the supernatant, add activated carbon for decolorization, filter to remove the activated carbon, concentrate the filtrate to 5-10% of the original volume, and it is prepared.

5. The board material with antibacterial and insect-repellent functions according to claim 3, characterized in that, The extraction method of Phyllanthus urinaria extract is as follows: Take fresh Phyllanthus urinaria, add 1-3 parts by weight of water and beat into a slurry, then add 1-3 parts by weight of water, stir evenly, centrifuge to remove the precipitate, take the supernatant, add activated carbon for decolorization, filter to remove activated carbon, concentrate the filtrate to 7-15% of the original volume, and it is prepared.

6. The board material with antibacterial and insect-repellent functions according to claim 1, characterized in that, The herbal extract with antibacterial and insecticidal effects is a mixture of neem bark extract and three-needle extract in a weight ratio of 1:

1.

7. The board material with antibacterial and insect-repellent functions according to claim 6, characterized in that, The extraction method of the neem bark extract is as follows: take neem bark, sun-dry or oven-dry, grind into powder, pass through a 60-120 mesh sieve, add 3-8 times the weight of water and reflux extract 3 times, combine the filtrates, add activated carbon for decolorization, filter to remove activated carbon, concentrate the filtrate to 8-12% of the original volume, and it is prepared.

8. The board material with antibacterial and insect-repellent functions according to claim 6, characterized in that, The extraction method of the three needle extract is as follows: take three needles, sun-dry or oven-dry, grind into powder, pass through a 60-120 mesh sieve, add 4-10 times the weight of water and reflux extract 3 times, combine the filtrates, add activated carbon for decolorization, filter to remove activated carbon, concentrate the filtrate to 8-15% of the original volume, and it is prepared.

9. The method for preparing the board material with antibacterial and insect-repellent functions according to claim 1, characterized in that, Follow these steps: Immerse the veneer in a traditional Chinese medicine extract with antibacterial and insect-repellent effects for 5-10 hours; remove and air dry; apply soybean protein adhesive between adjacent veneers, with each layer containing 30-50 g / m² of soybean protein adhesive. 2 Hot pressing is used for adhesive molding. The hot pressing temperature is 100-120℃ and the time is 15-25 minutes.

10. The method for preparing the board material with antibacterial and insect-repellent functions according to claim 9, characterized in that, The soybean protein adhesive is prepared as follows: Take 80-120 parts by weight of defatted soybean powder and 10-30 parts by weight of aluminum hydroxide, add 1000-2000 parts by weight of water, stir for 5-10 minutes, then add 10-20 parts by weight of guanidine hydrochloride and 10-20 parts by weight of sodium dodecylbenzene sulfonate, and stir for 10-20 minutes; before use, add 10-30 parts by weight of crosslinking agent and mix evenly; the crosslinking agent is WSR-6101 type or WSR-6690 type epoxy resin.

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