Corrosion-resistant plastic bucket composite material and method for manufacturing the same

Abstract

The present application relates to the technical field of plastic bucket composite material, and discloses a kind of corrosion-resistant plastic bucket composite material and preparation method thereof.The plastic bucket composite material in the present application is with polypropylene resin and polyethylene resin as main matrix resin, and adds modified toughening agent, reinforcing agent, antioxidant, lubricant and maleic anhydride grafted polypropylene and other functional additives, and the corrosion resistance, weather resistance and toughness of the composite material are comprehensively improved;Among them, the addition of modified toughening agent improves the toughness and weather resistance of the matrix;The addition of reinforcing agent can synergistically act with antioxidant to improve the weather resistance and corrosion resistance of the matrix.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic bucket composite materials, and particularly relates to a corrosion-resistant plastic bucket composite material and a preparation method thereof. BACKGROUND

[0002] Commonly used materials of plastic buckets include polypropylene, polyethylene, polyvinyl chloride, etc., and polypropylene, as a semi-crystalline thermoplastic, has high impact resistance, strong mechanical properties, and can resist various organic solvents and acid and alkali corrosion, so that it can be widely used as a plastic bucket material to store liquid and solid materials in industries such as chemical raw materials, pesticides, lubricants, coatings, medicines, food, hardware and electronics, and electromechanical industries.

[0003] However, the toughness of polypropylene is generally poor, and external impact failure is inevitable during the transportation of large storage containers, which can easily cause leakage of storage media and pose a great safety hazard. In addition, the weather resistance of polypropylene material is poor, which can cause the material to be easily affected by ultraviolet rays, oxygen and high temperature during outdoor use, resulting in material aging, discoloration and performance degradation and cracking, which greatly limits the application of polypropylene bucket materials. In addition, plastic buckets often cannot meet the requirements when they are used in high-strength environments and extreme chemical corrosion. Therefore, in view of the increasing requirements for polypropylene plastic buckets, a plastic bucket composite material with good toughness, good weather resistance and good corrosion resistance needs to be prepared to meet the actual application requirements. SUMMARY

[0004] In order to solve the above technical problems, the present application provides a corrosion-resistant plastic bucket composite material and a preparation method thereof.

[0005] The object of the present application can be achieved by the following technical solutions:

[0006] A corrosion-resistant plastic bucket composite material comprises the following raw materials by weight: 70-80 parts of polypropylene resin, 20-30 parts of polyethylene resin, 8-15 parts of modified toughening agent, 10-20 parts of reinforcing agent, 0.3-0.6 parts of antioxidant, 2-4 parts of lubricant, and 1-3 parts of maleic anhydride grafted polypropylene.

[0007] The antioxidant is one of antioxidant 1010 or antioxidant 168, and the lubricant is calcium stearate.

[0008] The modified toughening agent is prepared by the following steps:

[0009] Step A1, tetraethyl orthosilicate and dimethyldiethoxysilane were mixed in deionized water and stirred for 10 min to form a mixed solution, then the mixed solution was slowly added to ethanol, stirred for 2-3 h, then γ-glycidoxypropyltrimethoxysilane was slowly added, stirred for 0.5-1.5 h, then 10 wt% ammonia water was added, and transferred to a 60℃ water bath for 30 min, centrifuged, washed, and dried to obtain functionalized silicone microspheres;

[0010] Step A2, 2,2-dimethylol propionic acid, tetrabutylammonium bromide and N,N-dimethylformamide were mixed in the functionalized silicone microspheres, first purged with nitrogen for 10 min, then reacted under the conditions of nitrogen and 80-90℃ for 4-6 h, rotary evaporated, added ethyl acetate and stirred for 15 min, washed, and dried to obtain hyperbranched silicone precursor;

[0011] Step A3, the hyperbranched silicone precursor and potassium hydroxide were mixed, then purged with nitrogen for 10 min, then heated to 90-110℃ under nitrogen, reacted for 2-4 h, cooled to room temperature, added propylene oxide, heated to 60-80℃, reacted for 3-6 h, then cooled to 20-30℃, added epichlorohydrin, heated to 60-80℃, reacted for 2-3 h, then added 25 wt% potassium hydroxide solution, stirred for 2-3 h, washed, then added pentaerythritol phosphate at 60-80℃, stirred for 2.5-3.5 h, washed, and dried to obtain the modified toughening agent;

[0012] Further, in step A1, the amount ratio of tetraethyl orthosilicate, dimethyldiethoxysilane, deionized water, ethanol, γ-glycidoxypropyltrimethoxysilane and ammonia water was 0.05-0.1 mol:0.03-0.06 mol:20 mL:80 mL:0.01-0.03 mol:1-3 mL;

[0013] Further, in step A2, the amount ratio of 2,2-dimethylol propionic acid, tetrabutylammonium bromide, N,N-dimethylformamide and ethyl acetate was 0.01-0.03 mol:1.6-4.8 g:100 mL:30 mL;

[0014] Further, in step A3, the amount ratio of hyperbranched silicone precursor, potassium hydroxide, propylene oxide, epichlorohydrin, potassium hydroxide solution and pentaerythritol phosphate was 8-16 g:0.5-1.2 g:10-20 g:3-8 g:100 mL:5-10 g.

[0015] The reinforcing agent is prepared by the following steps:

[0016] Step B1, the zinc nitrate hexahydrate and 2,3,5,6-tetrafluorobenzenedicarboxylic acid are ultrasonically dispersed in N,N-dimethylformamide for 30 min, distilled water is added and stirred for 10 min, is transferred to an autoclave, and is reacted at 120 DEG C for 24 h, is filtered, washed, soaked in methanol for 72 h, filtered, and dried to obtain Zn-MOF (zinc-based metal organic framework);

[0017] Step B2, the Zn-MOF is ultrasonically dispersed in deionized water for 30 min, and then the magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and urea are ultrasonically dispersed for 30 min, and then is heated to 85-95 DEG C and stirred for 1.5-2.5 h, and then is transferred to an autoclave, and is reacted at 120 DEG C for 12 h, and is filtered, washed and dried to obtain Zn-MOF / magnesium-aluminum hydrotalcite;

[0018] Step B3, the gamma-methacryloxypropyltrimethoxysilane is stirred in a mixture of ethanol and deionized water for 30 min, and then the Zn-MOF / magnesium-aluminum hydrotalcite is added, and is heated to 35-55 DEG C and stirred for 3-5 h, and then is filtered, washed and dried to obtain the reinforcing agent;

[0019] Further, in step B1, the zinc nitrate hexahydrate, 2,3,5,6-tetrafluorobenzenedicarboxylic acid, N,N-dimethylformamide and distilled water are used in a ratio of 1.5-4.5 g:0.4-1.2 g:30 mL:1-2 mL;

[0020] Further, in step B2, the Zn-MOF, deionized water, magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and urea are used in a ratio of 1-2 g:100 mL:0.8-1.2 g:0.6-0.9 g:1.2-1.9 g;

[0021] Further, in step B3, the gamma-methacryloxypropyltrimethoxysilane, ethanol, deionized water and Zn-MOF / magnesium-aluminum hydrotalcite are used in a ratio of 0.2-0.8 mL:80 mL:20 mL:2-4 g.

[0022] A preparation method of a corrosion-resistant plastic bucket composite material comprises the following steps:

[0023] The raw materials are weighed by weight parts, the polypropylene resin, the polyethylene resin, the maleic anhydride grafted polypropylene and the modified toughening agent are added into a stirrer, and are stirred at 130-150 DEG C for 2-4 h, then the reinforcing agent, the antioxidant and the lubricant are added and uniformly stirred to obtain a mixture, and then the mixture is put into a double-screw extruder to be extruded and granulated to obtain the corrosion-resistant plastic bucket composite material.

[0024] The beneficial effects of the present application are as follows:

[0025] The plastic bucket composite material in the application is prepared by using polypropylene resin and polyethylene resin as main base resins, adding modified toughening agent, reinforcing agent, antioxidant, lubricant and maleic anhydride grafted polypropylene and other functional additives, and comprehensively improving the corrosion resistance, weather resistance and toughness of the composite material.

[0026] In the modified toughening agent, first, functionalized silicone microspheres with surface modified epoxy groups are synthesized by using tetraethyl orthosilicate, dimethyldiethoxysilane and gamma-glycidoxypropyltrimethoxysilane as raw materials; then, hyperbranched silicone precursor containing polyhydroxy structure is prepared by reacting the functionalized silicone microspheres with 2,2-dimethylolpropionic acid; finally, hyperbranched polyether chain segments are synthesized on the hyperbranched silicone precursor by using propylene oxide and epichlorohydrin as raw materials, and the modified toughening agent is prepared by end-capping with pentaerythritol phosphate. The modified toughening agent is prepared by taking the functionalized silicone microspheres as the core layer and the polyether chain segments as the shell layer, and adding the modified toughening agent into the base material can significantly improve the toughness and weather resistance of the base material; wherein, the silicone microspheres in the core layer can uniformly disperse the impact stress and reduce the stress concentration on the base material when the base material is subjected to external force impact, thereby improving the toughness of the base material, and the polyether branched chain structure in the shell layer can entangle with the polypropylene molecular chain to form a network structure, thereby further improving the toughness of the base material; in addition, the phosphate structure at the end of the modified toughening agent also improves the weather resistance of the base material, because the phosphorus-oxygen bond in the phosphate molecule has high bond energy and is relatively stable under the action of ultraviolet light and oxygen, and is not easy to degrade, thereby improving the weather resistance of the composite material.

[0027] In the reinforcing agent, Zn-MOF is prepared from zinc nitrate hexahydrate and 2,3,5,6-tetrafluoroterephthalic acid as raw materials; magnesium aluminum hydrotalcite is synthesized from magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and urea as raw materials, and the Zn-MOF is loaded on the magnesium aluminum hydrotalcite to prepare Zn-MOF / magnesium aluminum hydrotalcite; finally, the surface of the Zn-MOF / magnesium aluminum hydrotalcite is treated by a coupling agent to prepare the reinforcing agent. The introduction of the reinforcing agent improves the corrosion resistance of the matrix, which is due to the synergistic effect of the magnesium aluminum hydrotalcite and the Zn-MOF in the reinforcing agent, the unique physical structure of which has a physical barrier effect on air, water and corrosive ions and other corrosive substances, and the loaded Zn-MOF can reinforce the magnesium aluminum hydrotalcite to further improve the corrosion resistance of the matrix; finally, the Zn-MOF / magnesium aluminum hydrotalcite treated by the coupling agent has good dispersibility in the matrix, which can further improve the corrosion resistance of the matrix; the Zn-MOF is synthesized by using an organic ligand containing fluorine element, and the fluorine element has good corrosion resistance and can resist the corrosion of strong acid, strong alkali and other corrosive media, further improving the corrosion resistance of the matrix. In addition, the physical structure of the reinforcing agent also has the effect of shielding ultraviolet rays, which helps to reduce the direct damage of ultraviolet rays to the matrix and improves the weather resistance of the composite material. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0029] Example 1: The modified toughening agent is prepared by the following steps:

[0030] Step A1, 0.05 mol of tetraethyl orthosilicate and 0.03 mol of dimethyldiethoxysilane are mixed and stirred in 20 mL of deionized water for 10 min to form a mixed solution, then the mixed solution is slowly added to 80 mL of ethanol, stirred and reacted for 2 h, then 0.01 mol of γ-glycidoxypropyltrimethoxysilane is slowly added, stirred and reacted for 0.5 h, then 1 mL of 10 wt% ammonia water is added, and transferred to a 60℃ water bath for standing for 30 min, centrifuged, washed, and dried to obtain functionalized silicone microspheres;

[0031] Step A2, 0.01 mol of 2,2-dimethylol propionic acid, 1.6 g of tetrabutylammonium bromide and 100 mL of N,N-dimethylformamide are added to the functionalized silicone microspheres and mixed, first purged with nitrogen for 10 min, then reacted at 80℃ under nitrogen for 4 h, rotary evaporated, 30 mL of ethyl acetate is added and stirred for 15 min, washed and dried to obtain hyperbranched silicone precursor.

[0032] Step A3, 8 g of hyperbranched organosilicon precursor and 0.5 g of potassium hydroxide were mixed, then purged with nitrogen for 10 min, and then heated to 90°C under nitrogen for 2 h. Then 10 g of propylene oxide was added, and the temperature was raised to 60°C for 3 h. Then the temperature was lowered to 20°C, and 3 g of epichlorohydrin was added. The temperature was raised to 60°C for 2 h, and then 100 mL of 25 wt% potassium hydroxide solution was added and stirred for 2 h. Then it was washed and 5 g of pentaerythritol phosphate was added at 60°C and stirred for 2.5 h. Then it was washed and dried to obtain the modified toughening agent.

[0033] The reinforcing agent was prepared by the following steps:

[0034] Step B1, 1.5 g of zinc nitrate hexahydrate and 0.4 g of 2,3,5,6-tetrafluoroterephthalic acid were ultrasonically dispersed in 30 mL of N,N-dimethylformamide for 30 min. 1 mL of distilled water was added and stirred for 10 min. Then it was transferred to an autoclave and reacted at 120°C for 24 h. Then it was filtered, washed, soaked in methanol for 72 h, filtered, and dried to obtain Zn-MOF;

[0035] Step B2, 1 g of Zn-MOF was ultrasonically dispersed in 100 mL of deionized water for 30 min. Then 0.8 g of magnesium nitrate hexahydrate, 0.6 g of aluminum nitrate nonahydrate, and 1.2 g of urea were added and ultrasonically dispersed for 30 min. Then the temperature was raised to 85°C and stirred for 1.5 h. Then it was transferred to an autoclave and reacted at 120°C for 12 h. Then it was filtered, washed, and dried to obtain Zn-MOF / magnesium-aluminum hydrotalcite;

[0036] Step B3, 0.2 mL of γ-methacryloyloxypropyltrimethoxysilane was stirred in a mixture of 80 mL of ethanol and 20 mL of deionized water for 30 min. Then 2 g of Zn-MOF / magnesium-aluminum hydrotalcite was added and the temperature was raised to 35°C for 3 h. Then it was filtered, washed, and dried to obtain the reinforcing agent.

[0037] Example 2: The modified toughening agent was prepared by the following steps:

[0038] Step A1, 0.075 mol of tetraethyl orthosilicate and 0.045 mol of dimethyldiethoxysilane were mixed in 20 mL of deionized water and stirred for 10 min to form a mixture. Then the mixture was slowly added to 80 mL of ethanol and stirred for 2.5 h. Then 0.02 mol of γ-glycidoxypropyltrimethoxysilane was slowly added and stirred for 1 h. Then 2 mL of 10 wt% ammonia water was added and transferred to a 60°C water bath for 30 min. Then it was centrifuged, washed, and dried to obtain functionalized organosilicon microspheres;

[0039] Step A2, 0.02 mol 2,2-dimethylol propionic acid, 3.2 g tetrabutyl ammonium bromide and 100 mL N,N-dimethylformamide were mixed into the functionalized silicone microspheres, purged with nitrogen for 10 min, and then reacted at 85°C for 5 h under nitrogen. After rotary evaporation, 30 mL ethyl acetate was added and stirred for 15 min. After washing and drying, the hyperbranched silicone precursor was obtained.

[0040] Step A3, 12 g of the hyperbranched silicone precursor and 0.85 g of potassium hydroxide were mixed, purged with nitrogen for 10 min, and then heated to 100°C under nitrogen for 3 h. After cooling to room temperature, 15 g of propylene oxide was added, and then heated to 70°C for 4.5 h. After cooling to 25°C, 5.5 g of epichlorohydrin was added, and then heated to 70°C for 2.5 h. After stirring for 2.5 h, 100 mL of 25 wt% potassium hydroxide solution was added, and then stirred for 2.5 h. After washing, 7.5 g of pentaerythritol phosphate was added at 70°C, and then stirred for 3 h. After washing and drying, the modified toughening agent was obtained.

[0041] The reinforcing agent was prepared by the following steps:

[0042] Step B1, 3 g of zinc nitrate hexahydrate and 0.8 g of 2,3,5,6-tetrafluoroterephthalic acid were ultrasonically dispersed in 30 mL of N,N-dimethylformamide for 30 min. After adding 1.5 mL of distilled water and stirring for 10 min, it was transferred to an autoclave and reacted at 120°C for 24 h. After filtration, washing, and soaking in methanol for 72 h, filtration and drying, the Zn-MOF was obtained.

[0043] Step B2, 1.5 g of Zn-MOF was ultrasonically dispersed in 100 mL of deionized water for 30 min. After adding 1 g of magnesium nitrate hexahydrate, 0.75 g of aluminum nitrate nonahydrate, and 1.55 g of urea, it was ultrasonically dispersed for another 30 min. After heating to 90°C and stirring for 2 h, it was transferred to an autoclave and reacted at 120°C for 12 h. After filtration, washing, and drying, the Zn-MOF / magnesium-aluminum hydrotalcite was obtained.

[0044] Step B3, 0.5 mL of γ-methacryloxypropyltrimethoxysilane was stirred in a mixture of 80 mL of ethanol and 20 mL of deionized water for 30 min. After adding 3 g of Zn-MOF / magnesium-aluminum hydrotalcite, it was heated to 45°C and stirred for 4 h. After filtration, washing, and drying, the reinforcing agent was obtained.

[0045] Example 3: The modified toughening agent was prepared by the following steps:

[0046] Step A1, 0.1 mol of tetraethyl orthosilicate and 0.06 mol of dimethyl diethoxysilane were mixed in 20 mL of deionized water and stirred for 10 min to form a mixed solution, and then the mixed solution was slowly added dropwise into 80 mL of ethanol and stirred for reaction for 3 h, then 0.03 mol of γ-glycidoxypropyltrimethoxysilane was slowly added, stirred for reaction for 1.5 h, then 3 mL of 10 wt% ammonia water was added, and transferred to a 60°C water bath for standing for 30 min, centrifuged, washed, and dried to obtain the functionalized silicone microspheres;

[0047] Step A2, 0.03 mol of 2,2-dimethylol propionic acid, 4.8 g of tetrabutylammonium bromide and 100 mL of N,N-dimethylformamide were mixed in the functionalized silicone microspheres, first purged with nitrogen for 10 min, then reacted at 90°C for 6 h under nitrogen, rotary evaporated, 30 mL of ethyl acetate was added and stirred for 15 min, washed and dried to obtain the hyperbranched silicone precursor;

[0048] Step A3, 16 g of the hyperbranched silicone precursor and 1.2 g of potassium hydroxide were mixed, then purged with nitrogen for 10 min, then heated to 110°C under nitrogen, reacted for 4 h, then cooled to room temperature, added 20 g of propylene oxide, then heated to 80°C, reacted for 6 h, then cooled to 30°C, added 8 g of epichlorohydrin, stirred and heated to 80°C, reacted for 3 h, then added 100 mL of 25 wt% potassium hydroxide solution, stirred for 3 h, washed, then added 10 g of pentaerythritol phosphate at 80°C, stirred and reacted for 3.5 h, washed, dried to obtain the modified toughening agent.

[0049] The reinforcing agent was prepared by the following steps:

[0050] Step B1, 4.5 g of zinc nitrate hexahydrate and 1.2 g of 2,3,5,6-tetrafluoroterephthalic acid were ultrasonically dispersed in 30 mL of N,N-dimethylformamide for 30 min, 2 mL of distilled water was added and stirred for 10 min, then transferred to an autoclave and reacted at 120°C for 24 h, filtered, washed, soaked in methanol for 72 h, filtered, dried to obtain the Zn-MOF;

[0051] Step B2, 2 g of Zn-MOF was ultrasonically dispersed in 100 mL of deionized water for 30 min, then 1.2 g of magnesium nitrate hexahydrate, 0.9 g of aluminum nitrate nonahydrate and 1.9 g of urea were ultrasonically dispersed for 30 min, then heated to 95°C and stirred for reaction for 2.5 h, then transferred to an autoclave and reacted at 120°C for 12 h, filtered, washed, dried to obtain the Zn-MOF / magnesium-aluminum hydrotalcite;

[0052] Step B3, 0.8 mL of γ-methacryloxypropyltrimethoxysilane was stirred in a mixture of 80 mL of ethanol and 20 mL of deionized water for 30 min, then 4 g of Zn-MOF / Mg-Al hydrotalcite was added, the temperature was raised to 55°C and the reaction was stirred for 5 h, then filtered, washed and dried to obtain the reinforcing agent.

[0053] Example 4: A method for preparing a corrosion-resistant plastic bucket composite material includes the following steps:

[0054] Polypropylene resin 70 parts, polyethylene resin 20 parts, modified toughening agent prepared in Example 1 8 parts, reinforcing agent prepared in Example 1 10 parts, antioxidant 1010 0.3 parts, calcium stearate 2 parts, maleic anhydride grafted polypropylene 1 part;

[0055] The raw materials are weighed by weight parts, the polypropylene resin, the polyethylene resin, the maleic anhydride grafted polypropylene and the modified toughening agent prepared in Example 1 are added to a stirrer, stirred at 130°C for 2h, then the reinforcing agent prepared in Example 1, antioxidant 1010 and calcium stearate are added and stirred uniformly to obtain a mixture, then the mixture is put into a double screw extruder for extrusion and granulation to obtain the corrosion-resistant plastic bucket composite material.

[0056] Example 5: A method for preparing a corrosion-resistant plastic bucket composite material includes the following steps:

[0057] Polypropylene resin 75 parts, polyethylene resin 25 parts, modified toughening agent prepared in Example 2 12 parts, reinforcing agent prepared in Example 2 15 parts, antioxidant 168 0.45 parts, calcium stearate 3 parts, maleic anhydride grafted polypropylene 2 parts;

[0058] The raw materials are weighed by weight parts, the polypropylene resin, the polyethylene resin, the maleic anhydride grafted polypropylene and the modified toughening agent prepared in Example 2 are added to a stirrer, stirred at 140°C for 3h, then the reinforcing agent prepared in Example 2, antioxidant 168 and calcium stearate are added and stirred uniformly to obtain a mixture, then the mixture is put into a double screw extruder for extrusion and granulation to obtain the corrosion-resistant plastic bucket composite material.

[0059] Example 6: A method for preparing a corrosion-resistant plastic bucket composite material includes the following steps:

[0060] Polypropylene resin 80 parts, polyethylene resin 30 parts, modified toughening agent prepared in Example 3 15 parts, reinforcing agent prepared in Example 3 20 parts, antioxidant 168 0.6 parts, maleic anhydride grafted polypropylene 3 parts, calcium stearate 4 parts;

[0061] The raw materials were weighed by weight parts, the polypropylene resin, the polyethylene resin, the maleic anhydride grafted polypropylene and the modified toughening agent prepared in Example 3 were added into a stirrer, stirred at 150℃ for 4h, then the reinforcing agent prepared in Example 3, the antioxidant 168 and the calcium stearate were added and stirred uniformly to obtain a mixture, and then the mixture was extruded and granulated in a double screw extruder to obtain the corrosion-resistant plastic bucket composite material.

[0062] Comparative Example 1: The plastic bucket composite material of this comparative example is different from Example 6 in that the commercially available thermoplastic elastomer POE is used instead of the modified toughening agent prepared in Example 3, and the rest are the same.

[0063] Comparative Example 2: The plastic bucket composite material of this comparative example is different from Example 6 in that the magnesium-aluminum hydrotalcite treated with a coupling agent (the specific steps are the same as step B3 of Example 3) is used instead of the reinforcing agent prepared in Example 3, and the rest are the same.

[0064] Comparative Example 3: The plastic bucket composite material of this comparative example is different from Example 6 in that the Zn-MOF treated with a coupling agent (the specific steps are the same as step B3 of Example 3) is used instead of the reinforcing agent prepared in Example 3, and the rest are the same.

[0065] The plastic bucket composite materials prepared in Examples 4-6 and Comparative Examples 1-3 were tested for performance:

[0066] Tensile strength test: The tensile strength test was carried out according to the method specified in GB / T1040-2018, with a tensile rate of 10mm / min;

[0067] Notched impact strength test: The notched impact strength of the material was tested according to ISO180-2000, with a type A notch and an impact pendulum capacity of 5.5J;

[0068] Weather resistance test: After drying the sample in a forced air oven at 120℃ for 4h, a smooth color plate with no skin was injection molded into a size of 83mmx54mmx2m using an injection molding machine at 240℃ with an injection molding cycle of 5s; The test was carried out in a UVA-340 test chamber according to the provisions of GB / T 16422.3-2014 cycle 1: 8h drying + 4h condensation for 1 cycle, for a total of 6 cycles for 72h; The data under D65 light source of the color plate were measured before and after the color plate was put into the test chamber using X-rite7000A colorimeter, and the color difference before and after was compared, represented by △E, the larger the △E, the larger the color difference;

[0069] Corrosion resistance test: The corrosion resistance of the sample was tested according to GB / T 10125-2021, and the mass loss rate was calculated according to the formula: mass loss rate = [(m 前 -m 后 ) / m 前] x 100%;

[0070] The test results are shown in Table 1:

[0071] Table 1: Performance test results

[0072]

[0073] As shown in Table 1, the plastic bucket composite material prepared by the application has the tensile strength in the range of (33.3-35.5) MPa, the notched impact strength in the range of (66.8-68.1) KJ / m 2 The color difference is in the range of 0.4-0.5, the mass reduction rate is in the range of (0.023-0.026) %, indicating that the composite material has excellent toughness, weather resistance and corrosion resistance.

[0074] The above is only an example and description of the concept of the application, and those skilled in the art can make various modifications or supplements to the described specific embodiments or use similar ways to replace, as long as they do not deviate from the scope defined by the concept of the application, which shall belong to the protection scope of the application.

Claims

1. A corrosion resistant plastic pail composite material, characterized by, The raw materials include the following components by weight: polypropylene resin 70-80 parts, polyethylene resin 20-30 parts, modified toughening agent 8-15 parts, reinforcing agent 10-20 parts, antioxidant 0.3-0.6 parts, lubricant 2-4 parts, maleic anhydride grafted polypropylene 1-3 parts; The modified toughening agent is prepared by the following steps: Step A1, tetraethyl orthosilicate and dimethyldiethoxysilane are mixed in deionized water and stirred for 10 min to form a mixed solution, the mixed solution is slowly added to ethanol, stirred and reacted for 2-3 h, then γ-glycidyl ether propyltrimethoxysilane is slowly added, stirred and reacted for 0.5-1.5 h, then 10wt% ammonia water is added, and transferred to a 60℃ water bath for 30 min, centrifuged, washed, and dried to obtain functionalized silicone microspheres, the amount ratio of tetraethyl orthosilicate, dimethyldiethoxysilane, deionized water, ethanol, γ-glycidyl ether propyltrimethoxysilane and ammonia water is 0.05-0.1 mol:0.03-0.06 mol:20 mL:80 mL:0.01-0.03 mol:1-3 mL; Step A2, 2,2-dimethylol propionic acid, tetrabutylammonium bromide and N,N-dimethylformamide are mixed in the functionalized silicone microspheres, first purged with nitrogen for 10 min, then reacted at 80-90℃ for 4-6 h under nitrogen, rotary evaporated, added with ethyl acetate and stirred for 15 min, washed and dried to obtain hyperbranched silicone precursor, the amount ratio of 2,2-dimethylol propionic acid, tetrabutylammonium bromide, N,N-dimethylformamide and ethyl acetate is 0.01-0.03 mol:1.6-4.8 g:100 mL:30 mL; Step A3, the hyperbranched silicone precursor and potassium hydroxide are mixed, purged with nitrogen for 10 min, then heated to 90-110℃ under nitrogen, reacted for 2-4 h, cooled to room temperature, added with propylene oxide, heated to 60-80℃, reacted for 3-6 h, cooled to 20-30℃, added with epichlorohydrin, stirred and heated to 60-80℃, reacted for 2-3 h, added with 25wt% potassium hydroxide solution, stirred for 2-3 h, washed, added with pentaerythritol phosphate at 60-80℃, stirred and reacted for 2.5-3.5 h, washed and dried to obtain the modified toughening agent, the amount ratio of hyperbranched silicone precursor, potassium hydroxide, propylene oxide, epichlorohydrin, potassium hydroxide solution and pentaerythritol phosphate is 8-16 g:0.5-1.2 g:10-20 g:3-8 g:100 mL:5-10 g; The reinforcing agent is prepared by the following steps: Step B1, ultrasonic dispersion of zinc nitrate hexahydrate and 2,3,5,6-tetrafluoroterephthalic acid in N,N-dimethylformamide for 30 min, stirring in distilled water for 10 min, transfer to an autoclave, reaction at 120℃ for 24 h, filtration, washing, soaking in methanol for 72 h, filtration, drying, to obtain Zn-MOF, the amount ratio of zinc nitrate hexahydrate, 2,3,5,6-tetrafluoroterephthalic acid, N,N-dimethylformamide and distilled water is 1.5-4.5g:0.4-1.2g:30mL:1-2mL; Step B2, ultrasonic dispersion of Zn-MOF in deionized water for 30 min, then ultrasonic dispersion of magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and urea for 30 min, then heating to 85-95℃ and stirring for 1.5-2.5h, then transferring to an autoclave, reaction at 120℃ for 12h, filtration, washing, drying, to obtain Zn-MOF / magnesium-aluminum hydrotalcite, the amount ratio of Zn-MOF, deionized water, magnesium nitrate hexahydrate, aluminum nitrate nonahydrate and urea is 1-2g:100mL:0.8-1.2g:0.6-0.9g:1.2-1.9g; Step B3, stirring of γ-methacryloyloxypropyltrimethoxysilane in a mixture of ethanol and deionized water for 30 min, then adding Zn-MOF / magnesium-aluminum hydrotalcite, heating to 35-55℃ and stirring for 3-5h, filtration, washing, drying, to obtain the reinforcing agent, the amount ratio of γ-methacryloyloxypropyltrimethoxysilane, ethanol, deionized water and Zn-MOF / magnesium-aluminum hydrotalcite is 0.2-0.8mL:80mL:20mL:2-4g.

2. A corrosion resistant plastic bucket composite material as claimed in claim 1, wherein, The antioxidant is one of antioxidant 1010 or antioxidant 168, and the lubricant is calcium stearate.

3. A method of preparing the corrosion resistant plastic bucket composite material according to any one of claims 1-2, characterized in that, The following steps are included: The raw materials are weighed by parts by weight, the polypropylene resin, the polyethylene resin, the maleic anhydride grafted polypropylene and the modified toughening agent are added into a stirrer, stirring at 130-150℃ for 2-4h, then the reinforcing agent, the antioxidant and the lubricant are added and mixed uniformly to obtain a mixture, and the mixture is extruded and granulated in a twin-screw extruder to obtain the corrosion-resistant plastic bucket composite material.

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