A jade resin handicraft and a preparation method thereof

Abstract

This application relates to the field of polymer resin material processing, specifically disclosing a jade-like resin craft and its preparation method. The jade-like resin craft comprises the following raw materials in parts by weight: 90-110 parts unsaturated polyester resin, 18-25 parts aluminum hydroxide, 0.2-0.4 parts titanium dioxide, 0.03-0.08 parts white paste, 0.1-0.3 parts accelerator, and 2-3 parts curing agent. The preparation method is as follows: S1, mixing and stirring the unsaturated polyester resin, aluminum hydroxide, titanium dioxide, and white paste evenly to obtain a preliminary mixture; S2, adding the accelerator to the preliminary mixture and stirring evenly, and finally adding the curing agent and stirring evenly to obtain a final mixture; S3, pouring the mixture into a mold, curing, and maintaining the mixture to obtain the finished product. This product has the advantages of high structural density and structural stability, and is less prone to problems such as porosity, collapse, and shrinkage.

Description

Technical Field

[0001] This application relates to the field of polymer resin material processing, and more specifically, it relates to a jade resin handicraft and its preparation method. Background Technology

[0002] Resin handicrafts are finished products made from resin as the main raw material, cast into molds, and can be made into shapes such as animals, figures, and landscapes, imitating the material effects of copper, gold, jade, and wood. The handicrafts have the advantages of wear resistance, rich colors, and strong plasticity, and are widely used in furniture ornaments, garden landscapes, and other decorative fields.

[0003] Currently, during the casting process of imitation jade handicrafts, uneven mixing of resin and filler often leads to incomplete degassing, resulting in problems such as air holes and vacuum inside and on the surface of the handicrafts, affecting their appearance and strength. Furthermore, the volume shrinkage during resin curing can easily cause local depressions or shrinkage cavities, thus affecting the quality of the handicrafts.

[0004] Therefore, how to prepare a new type of jade resin craft with high structural density and stability, and less prone to problems such as porosity, collapse, and shrinkage, thereby extending the durability and service life of the craft, is an urgent problem to be solved. Summary of the Invention

[0005] In order to prepare a new type of jade resin handicraft with the advantages of high structural density and structural stability, and less prone to problems such as porosity, collapse and shrinkage, thereby extending the durability and service life of the handicraft, this application provides a jade resin handicraft and its preparation method.

[0006] In a first aspect, this application provides a jade resin handicraft, employing the following technical solution: A jade-like resin handicraft, the handicraft being made from the following raw materials in parts by weight: 90-110 parts of unsaturated polyester resin, 18-25 parts of aluminum hydroxide, 0.2-0.4 parts of titanium dioxide, 0.03-0.08 parts of white paste, 0.1-0.3 parts of accelerator, and 2-3 parts of curing agent.

[0007] By adopting the above technical solution, aluminum hydroxide, as an inorganic filler, is added to unsaturated polyester resin in conjunction with accelerators and curing agents. During curing, the strength of aluminum hydroxide forms a rigid support connection between the filler and the resin, inhibiting molecular chain rearrangement and reducing the shrinkage rate of the unsaturated polyester resin during curing. This reduces micropores and cracks, and the rigid network can further resist deformation, reduce surface collapse and shrinkage problems, and improve structural density and stability. Combined with titanium dioxide and white paste, the interfacial connection with the resin is enhanced. The white paste can also improve the rheological properties of the system, improve the scratch resistance of the surface, reduce surface tension, and inhibit shrinkage cavities.

[0008] Preferably, the aluminum hydroxide is carrier aluminum hydroxide, which is prepared by bonding polyvinyl acetate emulsion with aluminum hydroxide after treatment with a silane coupling agent, and the mass ratio of aluminum hydroxide to polyvinyl acetate emulsion is 10:0.2-0.3.

[0009] By adopting the above technical solution, after aluminum hydroxide is treated with a silane coupling agent, the silanol group generated by hydrolysis at one end of the molecule undergoes a condensation reaction with the hydroxyl group on the surface of aluminum hydroxide to form a stable Si-O-Al covalent bond, achieving chemical anchoring. Partial polyvinyl acetate is connected to achieve loading. Furthermore, the silane coupling agent on the surface of aluminum hydroxide can improve the connection effect between aluminum hydroxide and unsaturated polyester resin. Polyvinyl acetate, with its toughness and elasticity, can form an elastic buffer during the curing process of unsaturated polyester resin. Its molecular chain contains polar acetoxy groups, which have a certain degree of free rotation ability. Under stress, it can deform without easily breaking, effectively resisting shrinkage stress. Combined with the rigid resistance and high density connection effect of aluminum hydroxide, the volume shrinkage rate during the curing process of unsaturated polyester resin is further reduced, internal stress of the product is reduced, porosity is reduced, and surface smoothness and dimensional stability are improved, making it less prone to collapse and pitting problems.

[0010] Preferably, the titanium dioxide is modified titanium dioxide, which is prepared by processing titanium dioxide containing stearic acid and methyl methacrylate, and the mass ratio of titanium dioxide, stearic acid and methyl methacrylate is 100:2-3:3-5.

[0011] By adopting the above technical solution, stearic acid is linked to the hydroxyl groups on the surface of titanium dioxide through carboxyl groups, reducing the surface energy of titanium dioxide and facilitating the overflow of bubbles, thus reducing porosity. The combination of methyl methacrylate and stearic acid improves the compatibility and bonding effect between titanium dioxide and unsaturated polyester resin, increases the density of the internal cross-linking structure, enhances the curing rigidity, reduces collapse, and promotes the full wetting of titanium dioxide by the resin, reducing interfacial porosity. When the unsaturated polyester resin undergoes volume shrinkage, it can resist shrinkage stress, thereby reducing the porosity and collapse problems of the craft and extending the service life of the craft.

[0012] Preferably, the accelerator is composed of cobalt naphthenate and cobalt isooctanoate in a mass ratio of 1:0.1-0.2.

[0013] By adopting the above technical solution, the divalent cobalt ions in cobalt naphthenate and cobalt isooctanoate act as redox catalysts, which can promote the cross-linking of resin molecules to form a three-dimensional network structure, thereby achieving the shaping and curing of injection molded products.

[0014] Preferably, the curing agent is methyl ethyl ketone peroxide.

[0015] By adopting the above technical solution, methyl ethyl ketone peroxide generates active free radicals through decomposition, triggering cross-linking polymerization reactions between resin molecular chains, thereby realizing the transformation of liquid resin into high-strength solid products.

[0016] Preferably, the craft also includes 1-2 parts of mesoporous silica composite material and 1-2 parts of nanocellulose composite material.

[0017] By adopting the above technical solution, mesoporous silica, as a nanofiller, can be filled in unsaturated polyester resin. The hydroxyl groups on its surface can be adsorbed and connected with the unsaturated polyester resin, enhancing the interfacial bonding force and promoting the overflow of bubbles. Combined with the filling rigidity of mesoporous silica, it resists the volume shrinkage rate, thereby reducing the generation of pores and collapse.

[0018] Nanocellulose composites contain nanocellulose, which has a large specific surface area. When filled in unsaturated polyester resin, the porous structure can adsorb microbubbles, reduce the bubble nucleation rate, and decrease the porosity of the crafts. It can also resist the volume shrinkage of the unsaturated polyester resin by utilizing its own filling effect and high elastic modulus, reducing micropores and preventing surface shrinkage and collapse. This ensures the structural density and stability of the crafts and extends their service life.

[0019] Preferably, the mesoporous silica composite material is prepared from mesoporous silica and hydroxyl-terminated polybutadiene in a mass ratio of 1:3-5.

[0020] By adopting the above technical solution, mesoporous silica can adsorb some hydroxyl-terminated polybutadiene and disperse it in the hydroxyl-terminated polybutadiene. The hydroxyl groups on the surface of mesoporous silica attract and connect to the hydroxyl groups on the surface of the hydroxyl-terminated polybutadiene. The hydroxyl groups in the hydroxyl-terminated polybutadiene react and connect with the unsaturated polyester resin, bonding the flexible chain segments to the main chain of the unsaturated polyester resin, reducing the resin curing shrinkage rate. Combined with the high specific surface area and filling effect of mesoporous silica, it can not only fill the micro-nano pores formed by molecular chain shrinkage and improve the structural density, but also effectively buffer shrinkage stress, reducing cracking and collapse problems. The three-phase interface bridging effect formed by mesoporous silica, hydroxyl-terminated polybutadiene, and unsaturated polyester resin gives the craftsmanship the advantages of high structural density and good structural stability, making it less prone to porosity and collapse problems, and extending the service life of the craftsmanship.

[0021] Preferably, the nanocellulose composite is prepared by nanocellulose and stearyl stearate in a mass ratio of 1:0.1-0.2.

[0022] By adopting the above technical solution, stearyl stearate is attached to the surface of nanocellulose. Utilizing the lubricating and dispersing effect of stearyl stearate, the melt viscosity can be reduced, and the fluidity improved, facilitating the uniform dispersion of nanocellulose in unsaturated polyester resin. Combined with the bonding effect of stearyl stearate with the unsaturated polyester resin, the bonding effect between nanocellulose and the unsaturated polyester resin is enhanced. The bonding and supporting effect of nanocellulose resists the shrinkage stress of the unsaturated polyester resin, thereby reducing the volume shrinkage rate and minimizing porosity and collapse. Furthermore, some capillary channels of nanocellulose can adsorb microbubbles. During the curing process, the expanding unsaturated polyester resin blocks the pores of nanocellulose, further reducing porosity, improving the structural density and stability of the craft, reducing porosity, shrinkage, and collapse problems, and extending the service life of the craft.

[0023] Secondly, this application provides a method for preparing jade resin handicrafts, employing the following technical solution: A method for preparing a jade resin handicraft includes the following steps: S1. Mix and stir the unsaturated polyester resin, aluminum hydroxide, titanium dioxide and white paste evenly to obtain the initial mixture; S2. Add the accelerator to the initial mixture and stir until uniform. Finally, add the curing agent and stir until uniform to obtain the mixture. S3. The mixture is poured into the mold, cured, and maintained to obtain the finished product.

[0024] By adopting the above technical solutions, the crafts produced have high structural density and stability, and are less prone to problems such as porosity, collapse, and shrinkage, thereby extending the durability and service life of the crafts.

[0025] Preferably, the curing process involves the following steps: first, curing for 30-60 minutes, then raising the temperature to 70-80℃ and continuing curing for 1.5-3 hours.

[0026] By adopting the above technical solution, polyvinyl acetate, with a melting point of 60℃, can further improve the bonding effect between polyvinyl acetate and unsaturated polyester resin. Stearic acid and stearyl stearate can both be thermally melted at 70-80℃, which improves the bonding effect between aluminum hydroxide, nanocellulose and unsaturated polyester resin, increases the density and structural stability of the craft, thereby reducing porosity and depressions and extending the service life of the craft.

[0027] In summary, this application has the following beneficial effects: 1. Aluminum hydroxide, as an inorganic filler, accelerator, and curing agent, is added to unsaturated polyester resin. During curing, the strength of aluminum hydroxide forms a rigid support connection between the filler and the resin, inhibiting molecular chain rearrangement and reducing the shrinkage rate of the unsaturated polyester resin during curing. This reduces micropores and cracks caused by volume shrinkage. The rigid network further resists deformation, reduces surface collapse and shrinkage problems, and improves structural density and stability. Combined with titanium dioxide and white paste, it enhances the interfacial bonding effect with the resin. The white paste also improves the rheological properties of the system, increases surface scratch resistance, reduces surface tension, and inhibits shrinkage cavities.

[0028] 2. The silane coupling agent on the surface of aluminum hydroxide can improve the bonding effect between aluminum hydroxide and unsaturated polyester resin. Polyvinyl acetate, with its toughness and elasticity, can form an elastic buffer during the curing process of unsaturated polyester resin, which can effectively resist shrinkage stress. Combined with the rigidity and high density of aluminum hydroxide, it further reduces the volume shrinkage rate during the curing process of unsaturated polyester resin, reduces internal stress of the product, reduces porosity, and also improves surface smoothness and dimensional stability, making it less prone to collapse and pitting problems.

[0029] 3. The nanoscale structure of mesoporous silica and nanocellulose can guide the resin molecules to arrange themselves in an orderly manner in the early stage of curing, inhibiting microcracks and pores caused by disordered shrinkage, thereby further reducing porosity while ensuring structural stability and making it less prone to collapse and shrinkage problems. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the embodiments.

[0031] Example of preparation of loaded aluminum hydroxide Preparation Example 1: Loaded aluminum hydroxide was prepared by the following method: All of the following ingredients are commercially available.

[0032] 1 kg of aluminum hydroxide was dispersed in 9 kg of silane coupling agent and immersed and dispersed. The average particle size of the aluminum hydroxide was 500 nm. The silane coupling agent was KH-570. The aluminum hydroxide was separated and dried to obtain modified aluminum hydroxide. 0.03 kg of polyvinyl acetate emulsion was uniformly sprayed onto the surface of the modified aluminum hydroxide. During the spraying process, the modified aluminum hydroxide was continuously stirred. After the spraying was completed, stirring was continued for 10 min. Then, it was cured at room temperature and dispersed to obtain loaded aluminum hydroxide with an average particle size of less than 1 μm.

[0033] Preparation Example 2: The difference between this preparation example and Preparation Example 1 is that: 1 kg of aluminum hydroxide was dispersed in 9 kg of silane coupling agent and immersed and dispersed. The average particle size of the aluminum hydroxide was 500 nm. The silane coupling agent was KH-570. The aluminum hydroxide was separated and dried to obtain modified aluminum hydroxide. 0.02 kg of polyvinyl acetate emulsion was uniformly sprayed onto the surface of the modified aluminum hydroxide. During the spraying process, the modified aluminum hydroxide was continuously stirred. After the spraying was completed, stirring was continued for 10 min. Then, it was cured at room temperature and dispersed to obtain loaded aluminum hydroxide with an average particle size of less than 1 μm.

[0034] Preparation Example 3: The difference between this preparation example and Preparation Example 1 is that: 1 kg of aluminum hydroxide was dispersed in 9 kg of silane coupling agent and immersed and dispersed. The average particle size of the aluminum hydroxide was 500 nm. The silane coupling agent was KH-570. The aluminum hydroxide was separated and dried to obtain modified aluminum hydroxide. 0.025 kg of polyvinyl acetate emulsion was uniformly sprayed onto the surface of the modified aluminum hydroxide. During the spraying process, the modified aluminum hydroxide was continuously stirred. After the spraying was completed, stirring was continued for 10 min. Then, it was cured at room temperature and dispersed to obtain loaded aluminum hydroxide with an average particle size of less than 1 μm.

[0035] Example of preparation of modified titanium dioxide All of the following ingredients are commercially available.

[0036] Preparation Example 4: Modified titanium dioxide was prepared using the following method: Add 100 kg of titanium dioxide and 0.3 kg of sodium hexametaphosphate to 400 kg of deionized water, stir at 1500 r / min for 10 min, then ultrasonically disperse for 30 min, add ammonia water to adjust the pH to 9, and mix evenly to obtain a slurry. 2.5 kg of stearic acid was placed in 25 kg of ethanol, heated to 70 °C and stirred until completely dissolved to obtain a stearic acid solution; 5 kg of methyl methacrylate was placed in 50 kg of ethanol, heated to 70 °C and stirred until completely dissolved to obtain a methyl methacrylate solution. Stearic acid solution was added dropwise to the slurry and stirred evenly. The mixture was kept at a constant temperature for 30 minutes. Then, 0.025 kg of ammonium persulfate was added, followed by dropwise addition of methyl methacrylate solution. After mixing and stirring evenly, the mixture was kept at 80°C for 2 hours and then spray-dried to obtain the finished modified titanium dioxide.

[0037] Preparation Example 5: The difference between this preparation example and Preparation Example 4 is that: Add 100 kg of titanium dioxide and 0.3 kg of sodium hexametaphosphate to 400 kg of deionized water, stir at 1500 r / min for 10 min, then ultrasonically disperse for 30 min, add ammonia water to adjust the pH to 9, and mix evenly to obtain a slurry. 2 kg of stearic acid was placed in 25 kg of ethanol, heated to 70 °C and stirred until completely dissolved to obtain a stearic acid solution; 3 kg of methyl methacrylate was placed in 50 kg of ethanol, heated to 70 °C and stirred until completely dissolved to obtain a methyl methacrylate solution. Stearic acid solution was added dropwise to the slurry and stirred until homogeneous. The mixture was kept at this temperature for 30 minutes. Then, 0.02 kg of ammonium persulfate was added, followed by dropwise addition of methyl methacrylate solution. After mixing and stirring until homogeneous, the mixture was kept at 80°C for 2 hours and then spray-dried to obtain the finished modified titanium dioxide.

[0038] Preparation Example 6: The difference between this preparation example and Preparation Example 4 is that: Add 100 kg of titanium dioxide and 0.3 kg of sodium hexametaphosphate to 400 kg of deionized water, stir at 1500 r / min for 10 min, then ultrasonically disperse for 30 min, add ammonia water to adjust the pH to 9, and mix evenly to obtain a slurry. 3 kg of stearic acid was placed in 35 kg of ethanol, heated to 70 °C and stirred until completely dissolved to obtain a stearic acid solution; 4 kg of methyl methacrylate was placed in 50 kg of ethanol, heated to 70 °C and stirred until completely dissolved to obtain a methyl methacrylate solution. Stearic acid solution was added dropwise to the slurry and stirred evenly. The mixture was kept at a constant temperature for 30 minutes. Then, 0.028 kg of ammonium persulfate was added, followed by the addition of methyl methacrylate solution. After mixing and stirring evenly, the mixture was kept at 80°C for 2 hours and then spray-dried to obtain the finished modified titanium dioxide.

[0039] Preparation example of mesoporous silica composite material All of the following ingredients are commercially available.

[0040] Preparation Example 7: Mesoporous silica composite material was prepared using the following method: 1 kg of mesoporous silica was stirred and dispersed in 4 kg of hydroxyl-terminated polybutadiene. The average particle size of the mesoporous silica was 300 nm, thus obtaining a mesoporous silica composite material.

[0041] Preparation Example 8: The difference between this preparation example and Preparation Example 7 is that: 1 kg of mesoporous silica was stirred and dispersed in 3 kg of hydroxyl-terminated polybutadiene. The average particle size of the mesoporous silica was 300 nm, thus obtaining a mesoporous silica composite material.

[0042] Preparation Example 9: The difference between this preparation example and Preparation Example 7 is that: 1 kg of mesoporous silica was stirred and dispersed in 5 kg of hydroxyl-terminated polybutadiene. The average particle size of the mesoporous silica was 300 nm, thus obtaining a mesoporous silica composite material.

[0043] Preparation example of nanocellulose composite material All of the following ingredients are commercially available.

[0044] Preparation Example 10: Nanocellulose composite material was prepared using the following method: 1 kg of nanocellulose was ultrasonically dispersed in 9 kg of water for 30 min, and the average length of the nanocellulose was 200 nm, resulting in a dispersion. 0.15 kg of stearyl stearate was dissolved in 1.5 kg of isopropanol by stirring, resulting in a solution. The solution was added dropwise to the dispersion, ultrasonically dispersed for 20 min, and then spray-dried to obtain a nanocellulose composite material with an average particle size of less than 500 nm.

[0045] Preparation Example 11: The difference between this preparation example and Preparation Example 10 is that: 1 kg of nanocellulose was ultrasonically dispersed in 9 kg of water for 30 min, and the average length of the nanocellulose was 200 nm, resulting in a dispersion. 0.1 kg of stearyl stearate was dissolved in 1 kg of isopropanol by stirring, resulting in a solution. The solution was added dropwise to the dispersion, ultrasonically dispersed for 20 min, and then spray-dried to obtain a nanocellulose composite material with an average particle size of less than 500 nm.

[0046] Preparation Example 12: The difference between this preparation example and Preparation Example 10 is that: 1 kg of nanocellulose was ultrasonically dispersed in 9 kg of water for 30 min, and the average length of the nanocellulose was 200 nm, resulting in a dispersion. 0.2 kg of stearyl stearate was dissolved in 2 kg of isopropanol by stirring, resulting in a solution. The solution was added dropwise to the dispersion, ultrasonically dispersed for 20 min, and then spray-dried to obtain a nanocellulose composite material with an average particle size of less than 500 nm. Example

[0047] The unsaturated polyester resin in the following raw materials was purchased from Zhejiang Tianhe Resin Co., Ltd.; the other raw materials are all commercially available.

[0048] Example 1: A jade resin handicraft: The ingredients are: 100 kg unsaturated polyester resin, 20 kg aluminum hydroxide, 0.3 kg titanium dioxide, 0.05 kg white paste, 0.2 kg accelerator, and 2.5 kg curing agent. The accelerator consists of cobalt naphthenate and cobalt isooctanoate in a mass ratio of 1:0.15. The curing agent is methyl ethyl ketone peroxide. The preparation method is as follows: S1. Mix and stir the unsaturated polyester resin, aluminum hydroxide, titanium dioxide and white paste evenly to obtain the initial mixture; S2. Add the accelerator to the initial mixture and stir until uniform. Finally, add the curing agent and stir until uniform to obtain the mixture. S3. The mixture is poured into the mold, cured at room temperature for 6 hours, and then cured for 7 days to obtain the finished product.

[0049] Example 2: The difference between this example and Example 1 is that: The following materials were prepared: 100 kg of unsaturated polyester resin, 20 kg of aluminum hydroxide, 0.3 kg of titanium dioxide, 0.05 kg of white paste, 0.2 kg of accelerator, 2.5 kg of curing agent, 1.5 kg of mesoporous silica composite material, and 1.5 kg of nanocellulose composite material. The aluminum hydroxide used was the aluminum hydroxide prepared in Preparation Example 1; the titanium dioxide used was the titanium dioxide prepared in Preparation Example 4; the mesoporous silica composite material used was the mesoporous silica composite material prepared in Preparation Example 7; and the nanocellulose composite material used was the nanocellulose composite material prepared in Preparation Example 10. The accelerator consisted of cobalt naphthenate and cobalt isooctanoate in a mass ratio of 1:0.15. The curing agent was methyl ethyl ketone peroxide. The preparation method is as follows: S1. Mix and stir unsaturated polyester resin, aluminum hydroxide, titanium dioxide, mesoporous silica composite material, nanocellulose composite material and white paste evenly to obtain a preliminary mixture; S2. Add the accelerator to the initial mixture and stir until uniform. Finally, add the curing agent and stir until uniform to obtain the mixture. S3. The mixture is poured into the mold and cured for 50 minutes. Then, the temperature is raised to 75°C and cured for another 2 hours. After curing for 7 days, the finished product is obtained.

[0050] Example 3: The difference between this example and Example 2 is that: The following materials were prepared: 90 kg of unsaturated polyester resin, 18 kg of aluminum hydroxide, 0.2 kg of titanium dioxide, 0.03 kg of white paste, 0.1 kg of accelerator, 2 kg of curing agent, 1 kg of mesoporous silica composite material, and 1 kg of nanocellulose composite material. The aluminum hydroxide used was the aluminum hydroxide prepared in Preparation Example 2; the titanium dioxide used was the titanium dioxide prepared in Preparation Example 5; the mesoporous silica composite material used was the mesoporous silica composite material prepared in Preparation Example 8; the nanocellulose composite material used was the nanocellulose composite material prepared in Preparation Example 11; the accelerator consisted of cobalt naphthenate and cobalt isooctanoate in a mass ratio of 1:0.1; and the curing agent was methyl ethyl ketone peroxide. The preparation method is as follows: S3. The mixture is poured into the mold and cured for 30 minutes. Then, the temperature is raised to 70°C and cured for another 3 hours. After curing for 7 days, the finished product is obtained.

[0051] Example 4: The difference between this example and Example 2 is that: The following materials were prepared: 110 kg of unsaturated polyester resin, 25 kg of aluminum hydroxide, 0.4 kg of titanium dioxide, 0.08 kg of white paste, 0.3 kg of accelerator, 3 kg of curing agent, 2 kg of mesoporous silica composite material, and 2 kg of nanocellulose composite material. The aluminum hydroxide used was the aluminum hydroxide prepared in Preparation Example 3; the titanium dioxide used was the titanium dioxide prepared in Preparation Example 6; the mesoporous silica composite material used was the mesoporous silica composite material prepared in Preparation Example 9; the nanocellulose composite material used was the nanocellulose composite material prepared in Preparation Example 12; the accelerator consisted of cobalt naphthenate and cobalt isooctanoate in a mass ratio of 1:0.2; and the curing agent was methyl ethyl ketone peroxide. The preparation method is as follows: S3. The mixture is poured into the mold and cured for 60 minutes. Then, the temperature is raised to 80℃ and cured for another 1.5 hours. After curing for 7 days, the finished product is obtained.

[0052] Example 5: The difference between this example and Example 2 is that: Polyvinyl acetate was not added during the preparation of the aluminum hydroxide carrier.

[0053] Example 6: The difference between this example and Example 2 is that: Methyl methacrylate was not added during the preparation of the modified titanium dioxide.

[0054] Example 7: The difference between this example and Example 2 is that: The mesoporous silica composite material was replaced with an equal mass of mesoporous silica in the raw materials.

[0055] Example 8: The difference between this example and Example 2 is that: The nanocellulose composite material was replaced with an equal mass of nanocellulose in the raw materials.

[0056] Performance testing 1. Porosity detection The crafts were prepared using the methods of Examples 1-8 respectively. The density was calculated with reference to the impregnation method of GB / T1033.1, and the data was recorded. A high density indicates fewer pores.

[0057] 2. Volume shrinkage rate test The crafts were prepared using the methods of Examples 1-8 respectively. The volume shrinkage rate was tested according to GB / T24148.9, and the data were recorded. A low volume shrinkage rate indicates fewer pores, less collapse, and less shrinkage.

[0058] 3. Collapse detection The crafts were prepared using the methods of Examples 1-5 respectively. The depth of the depression in the thick wall of the surface was recorded by non-contact 3D optical scanning. The depth of the depression was the vertical height difference between the lowest point of the collapsed area and the surrounding normal surface.

[0059] Table 1 Performance Test Table (" / " in the table indicates no data is displayed)

[0060] As can be seen from Example 1 and Table 1, the crafts prepared in this application have high density, low volume shrinkage rate, and low depression depth, indicating that the finished crafts have high structural density, few pores, and few depressions, which can extend the service life of the crafts.

[0061] As can be seen from Examples 1 and 2-4 and Table 1, after treatment with aluminum hydroxide and the addition of mesoporous silica composite material and nanocellulose composite material, the structural density and structural stability of the handicrafts can be further improved, making them less prone to porosity and collapse, and extending their service life.

[0062] Combining Examples 2 and 5-8 with Table 1, it can be seen that no polyvinyl acetate was added during the preparation of the aluminum hydroxide carrier in Example 5. Compared with Example 2, the density of Example 5 was lower than that of Example 2, the volume shrinkage rate was higher than that of Example 2, and the pit depth was higher than that of Example 2. This indicates that polyvinyl acetate improves the bonding effect between aluminum hydroxide and unsaturated polyester resin. Combined with its toughness and elasticity, it can form an elastic buffer during the curing process of unsaturated polyester resin, resisting shrinkage stress. Combined with the rigidity resistance and high density bonding effect of aluminum hydroxide, it further reduces the volume shrinkage rate during the curing process of unsaturated polyester resin, reduces internal stress in the product, reduces porosity, and also improves surface smoothness and dimensional stability, making it less prone to collapse and pitting problems.

[0063] In Example 6, no methyl methacrylate was added during the preparation of the modified titanium dioxide. Compared with Example 2, the density of Example 6 was lower than that of Example 2, while the volume shrinkage rate was higher. This indicates that the combination of methyl methacrylate and stearic acid improved the compatibility and bonding effect between titanium dioxide and unsaturated polyester resin, increased the density of the internal cross-linking structure, enhanced the curing rigidity, and reduced collapse. When the unsaturated polyester resin undergoes volume shrinkage, it can resist shrinkage stress, thereby reducing the porosity and collapse problems of the craft and extending the service life of the craft.

[0064] In Example 7, the mesoporous silica composite material was replaced with an equal mass of mesoporous silica in the raw materials. Compared with Example 2, the density of Example 7 was lower than that of Example 2, and the volume shrinkage rate was higher than that of Example 2. This indicates that the terminal hydroxyl groups in the hydroxyl-terminated polybutadiene react and connect with the unsaturated polyester resin. Combined with the supporting effect of the mesoporous silica, the resin curing shrinkage rate is reduced, and cracking and collapse problems are reduced. The mesoporous silica, hydroxyl-terminated polybutadiene, and unsaturated polyester resin form a three-phase interface bridging effect, giving the craftsmanship the advantages of high structural density and good structural stability. It is not prone to porosity and collapse problems, thus extending the service life of the craftsmanship.

[0065] In Example 8, the nanocellulose composite material was replaced with an equal mass of nanocellulose. Compared to Example 2, the density of Example 8 was lower and the volume shrinkage rate was higher. This indicates that stearyl stearate promotes the uniform dispersion of nanocellulose in the unsaturated polyester resin. Combined with the bonding effect between stearyl stearate and the unsaturated polyester resin, it improves the bonding effect between nanocellulose and the unsaturated polyester resin, resists the shrinkage stress of the unsaturated polyester resin, thereby reducing the volume shrinkage rate, reducing the generation of porosity and collapse, improving the structural density and structural stability of the craft, reducing porosity, shrinkage, and collapse problems, and extending the service life of the craft.

[0066] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A jade-based resin handicraft, characterized in that, The craft product is made from the following raw materials in parts by weight: 90-110 parts unsaturated polyester resin, 18-25 parts aluminum hydroxide, 0.2-0.4 parts titanium dioxide, 0.03-0.08 parts white paste, 0.1-0.3 parts accelerator, and 2-3 parts curing agent.

2. A jade resin handicraft according to claim 1, characterized in that: The aluminum hydroxide is a loaded aluminum hydroxide, which is prepared by bonding polyvinyl acetate emulsion with aluminum hydroxide after treatment with a silane coupling agent. The mass ratio of aluminum hydroxide to polyvinyl acetate emulsion is 10:0.2-0.

3.

3. A jade resin handicraft according to claim 1, characterized in that, The titanium dioxide is modified titanium dioxide, which is prepared by processing with stearic acid and methyl methacrylate, and the mass ratio of titanium dioxide, stearic acid and methyl methacrylate is 100:2-3:3-5.

4. A jade resin handicraft according to claim 1, characterized in that, The accelerator is composed of cobalt naphthenate and cobalt isooctanoate in a mass ratio of 1:0.1-0.

2.

5. A jade resin handicraft according to claim 4, characterized in that, The curing agent is methyl ethyl ketone peroxide.

6. A jade resin handicraft according to claim 1, characterized in that, The craft also includes 1-2 parts of mesoporous silica composite material and 1-2 parts of nanocellulose composite material.

7. A jade resin handicraft according to claim 6, characterized in that, The mesoporous silica composite material is prepared by mixing mesoporous silica and hydroxyl-terminated polybutadiene in a mass ratio of 1:3-5.

8. A jade resin handicraft according to claim 6, characterized in that, The nanocellulose composite material is prepared by nanocellulose and stearyl stearate in a mass ratio of 1:0.1-0.

2.

9. A method for preparing a jade resin handicraft according to any one of claims 1-8, characterized in that, Includes the following steps: S1. Mix and stir the unsaturated polyester resin, aluminum hydroxide, titanium dioxide and white paste evenly to obtain the initial mixture; S2. Add the accelerator to the initial mixture and stir until uniform. Finally, add the curing agent and stir until uniform to obtain the mixture. S3. The mixture is poured into the mold, cured, and maintained to obtain the finished product.

10. The method for preparing a jade resin handicraft according to claim 9, characterized in that, The specific steps of the curing process are as follows: first, cure for 30-60 minutes, then raise the temperature to 70-80℃ and continue curing for 1.5-3 hours.

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